Relevant bibliographies by topics / Weak slope

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Weak slope'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Weak slope"

1

Liu, Hanxiang, Tong Qiu, and Qiang Xu. "Dynamic acceleration response of a rock slope with a horizontal weak interlayer in shaking table tests." PLOS ONE 16, no. 4 (April 21, 2021): e0250418. http://dx.doi.org/10.1371/journal.pone.0250418.

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The weak interlayer in a rock slope often plays a significant role in seismic rockslides; however, the effect of weak interlayer on the seismic slope response and damage process is still not fully understood. This study presents a series of shaking test tests on two model slopes containing a horizontal weak interlayer with different thicknesses. A recorded Wenchuan earthquake ground motion was scaled to excite the slopes. Measurements from accelerometers embedded at different elevations of slope surface and slope interior were analyzed and compared. The effect of the weak interlayer thickness on the seismic response was highlighted by a comparative analysis of the two slopes in terms of topographic amplification, peak accelerations, and deformation characteristics as the input amplitude increased. It was found that the structure deterioration and nonlinear response of the slopes were manifested as a time lag of the horizontal accelerations in the upper slope relative to the lower slope and a reduction of resonant frequency and Fourier spectral ratio. Test results show that under horizontal acceleration, both slopes exhibited significant topographic amplification in the upper half, and the difference in amplification between slope face and slope interior was more pronounced in Slope B (with a thin weak interlayer) than in Slope A (with a thick weak interlayer). A four-phased dynamic response process of both slopes was observed. Similar deformation characteristics including development of strong response zone and macro-cracks, vertical settlement, horizontal extrusion and collapse in the upper half were observed in both slopes as the input amplitude increased; however, the deformations were more severe in Slope B than in Slope A, suggesting an energy isolation effect of the thick interlayer in Slope A.
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Li, Yang, Ling Yu, Weidong Song, and Tianhong Yang. "Three-Dimensional Analysis of Complex Rock Slope Stability Affected by Fault and Weak Layer Based on FESRM." Advances in Civil Engineering 2019 (December 7, 2019): 1–14. http://dx.doi.org/10.1155/2019/6380815.

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Slope stability analysis is the most important problem in slope engineering design and construction. Open-pit slope often spans several strata, many of which are relatively weak. There may be faults and weak layers across the whole rock. It is very necessary to study the instability mechanism and stability analysis of multistratigraphic slopes with faults and weak layers. In this paper, taking a complex three-dimensional slope with fault and weak layer as the research object, the evolution laws of the stress field and damage zone of the slope are analyzed by using the finite element strength reduction method. The results show that the fault and weak layer have different degrees of effect on the slope stability. The fault causes stress concentration and damage to nearby rock mass, and the weak layer causes stress concentration on the slope above it and forms a dangerous slip zone. Then the effect of the fault and weak layer on slope stability is discussed. Because the effect of horizontal structural plane on slope stability is greater than that of the vertical structural plane, the effect of weak layer on slope stability is greater than that of the fault in the slope. The research results can provide a theoretical guidance for the study of slope stability in practical engineering.
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Shuheng, Zhong, and Miao Yinjun. "Research on the Influence of Weak Interlayer in Open-Pit Slope on Stability." Advances in Civil Engineering 2021 (July 7, 2021): 1–9. http://dx.doi.org/10.1155/2021/4256740.

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The weak interlayer in the slope meets with water threatening the overall stability of the slope. Sequestration location of the weak layer has an impact on the stability of the slope. Based on this, taking the south-side slope of Fushun West Open-Pit Mine as the background, the limit equilibrium method was used to study the influence of different depths and dip angles of weak interlayers on the factor-of-safety and sliding mode of the slope. After analyzing the effect, a bottom friction experiment was conducted to verify the theoretical results. The research results show that, as the buried depth of the weak layer becomes larger and the dip angle becomes smaller, the safety factor of the slope increases. Dip angle and depth both affect the sliding mode of the slope. This can provide a reference for study of the influence mechanism of weak interlayer on slope stability in multi-weak-layer slopes.
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Zhi, Song, and Liu Yang. "Dynamic Response Differences Between Bedding and Counter-Tilt Rock Slopes with Intercalated Weak Layers." Journal of Disaster Research 11, no. 4 (August 1, 2016): 681–90. http://dx.doi.org/10.20965/jdr.2016.p0681.

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Bedding and counter-tilt rock slope with intercalated weak layers are common geological bodies in west China, the dynamic response research will guide the anti-seismic reinforcement of bedding and counter-tilt rock slope with intercalated weak layer effectively. Two test models of bedding rock slope with intercalated weak layer and counter-tilt rock slope with intercalated weak layer, which are in the same size, have been designed and developed. A large scale shaking table test has been performed to analyze the dynamic response difference of bedding and counter-tilt rock slope with intercalated weak layer. The study results show that the acceleration amplification coefficient inside the bedding slope is smaller than that inside the counter-tilt rock slope; at the middle and upper parts of the slope body (relative height > 0.4), the acceleration amplification coefficient at bedding rock slope surface is larger than that of counter-tilt rock slope. At the lower part of the slope (relative height le 0.4), the acceleration amplification coefficient at bedding rock slope surface is close to that of counter-tilt rock slope. The slope surface displacement of both bedding and counter-tilt rock slopes increases with increasing input seismic wave amplitude. The slope surface displacement of the bedding rock is larger than that of counter-tilt rock slope. The seismic stability of counter-tilt rock slope is stronger than bedding rock slope. The dynamic failure form of bedding rock slope mainly includes vertical tension crack at back edge, bedding sliding along intercalated weak layer and rock collapse at slope crest; whereas the dynamic failure form of counter-tilt slope mainly includes intersection of horizontal and vertical cracks on slope surface, extrusion of intercalated weak layer and shattering of slope crest.
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Yao, Ding, Guoping Qian, Jiawu Liu, and Jialiang Yao. "Application of Polymer Curing Agent in Ecological Protection Engineering of Weak Rock Slopes." Applied Sciences 9, no. 8 (April 17, 2019): 1585. http://dx.doi.org/10.3390/app9081585.

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Under the action of water, weak rock slopes easily expand and the strength and stiffness decrease, which results in slope instability. The styrene–acrylic emulsion cement-matrix composite, a new type of polymer curing agent, was developed for the curing and treatment of weak rock slopes. The strength-reduction factor method and ANSYS finite element software were used to calculate and analyze the stability of slopes before and after protection. The stability safety factor of weak rock after protection increased by 30% from 2.0 to 2.6. In order to evaluate the performance of the polymer curing agent, the mixture test was carried out in the laboratory. It was found that the waterproofness, hydrophobicity, and microstructure of weak rock slopes with the polymer curing agent can be significantly improved. Finally, the polymer curing agent was adopted and the external-soil spray-seeding technique was used in physical engineering. From test results, it was indicated that the polymer curing agent for weak slopes is beneficial in improving the water-damage resistance of a slope surface and prevent or reduce the softening of weak rock so that plants can grow for a long time. The treatment for weak rock slopes was successfully combined with plant protection, achieving the dual effect of weak rock slope protection and ecological protection.
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Liu, Guang-wei, Dan-qing Song, Zhuo Chen, and Ju-wen Yang. "Dynamic Response Characteristics and Failure Mechanism of Coal Slopes with Weak Intercalated Layers under Blasting Loads." Advances in Civil Engineering 2020 (June 30, 2020): 1–18. http://dx.doi.org/10.1155/2020/5412795.

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Rock slopes with weak intercalated layers could experience disturbance from various deep mining activities; however, their dynamic stability has not been thoroughly investigated. In this paper, the dynamic response characteristics and failure mechanism of the coal slopes with weak intercalated layers under blasting loads were studied by means of numerical analysis, shaking table tests, and field tests. The effects of dynamic loads with different frequencies on the dynamic response of the slope were analyzed, and the natural frequency of the slope was also determined. The results show that the dynamic amplification effect of the slope is smaller than that of the homogeneous slope, and weak layers weaken the wave propagation in the rock mass. Both experimental and field investigation results show that the slope’s natural frequency was approximately 35 Hz. The slope deformation decreased with the distance of the blasting source. Cracks appear along the weak interlayer firstly under the action of horizontal vibration; then, longitudinal cracks occur at the slope crest. With the increase of dynamic loads, cracks continue expanding, deepening, and penetrating in the main controlled weak interlayer; then, the sliding body presents tensile shear failure along the sliding surface. This study could provide insights into the understanding of the coal slope instability and failure mechanism; this could benefit the blasting operation of the coal slope in fields.
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Zhou, Haizuo, Gang Zheng, Xinyu Yang, Yu Diao, Lisen Gong, and Xuesong Cheng. "Displacement of Pile-Reinforced Slopes with a Weak Layer Subjected to Seismic Loads." Mathematical Problems in Engineering 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1527659.

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The presence of a weak layer in a slope requires special attention because it has a negative impact on slope stability. However, limited insight into the seismic stability of slopes with a weak layer exists. In this study, the seismic stability of a pile-reinforced slope with a weak thin layer is investigated. Based on the limit analysis theory, a translational failure mechanism for an earth slope is developed. The rotational rigid blocks in the previous rotational-translational failure mechanism are replaced by continuous deformation regions, which consist of a sequence ofnrigid triangles. The predicted static factor of safety and collapse mechanism in two typical examples of slopes with a weak layer compare well with the results obtained from the available literature and by using the Discontinuity Layout Optimization (DLO) technique. The lateral forces provided by the stabilizing piles are evaluated using the theory of plastic deformation. An analytical solution for estimating the critical yield acceleration coefficient for the pile-reinforced slopes is derived. Based on the proposed translational failure mechanism and the corresponding critical yield acceleration coefficient, Newmark’s analytical procedure is employed to evaluate the cumulative displacement. Considering different real earthquake acceleration records as input motion, the effect of stabilizing piles and varying the spacing of piles on the cumulative displacement of slopes with a weak layer is investigated.
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Yang, Bing, Jiangrong Hou, Yifei Liu, and Zihong Zhou. "Dynamic Response and Failure Characteristics of Slope with Weak Interlayer under Action of Near-Fault Ground Motion." Shock and Vibration 2021 (April 30, 2021): 1–18. http://dx.doi.org/10.1155/2021/5595278.

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Investigations into the Wenchuan earthquake (2008, China) demonstrated that landslides were concentrated in the near-fault areas, and numerous large-scale landslides occurred in slopes with weak interlayers. A mathematical model was established based on the shear beam theory, while a numerical model was developed based on the discrete element method which perfectly matched layer boundary theory. Through a theoretical analysis and numerical simulation, the dynamic response and failure modes of the slope with a weak interlayer under the near-fault ground motion were studied. It was found that a combined effect took place between the near-fault ground motion and the weak interlayer, causing the slope near a fault to be destroyed more easily. The coupling between the near-fault ground motion and the weak interlayer leads to a maximum amplification effect of the slope. The existence of a weak interlayer induces nonconforming vibration between the upper and the lower rock masses of the interlayer. The variation in the amplification effect along the slope elevation is related to the ratio of the input seismic period to the natural slope period. Under horizontal ground motion, weak interlayers will be subjected to impacting and shearing action. The failure mode of the slope with a weak interlayer under near-fault ground motion can be expressed as a trailing edge tension crack, as well as weak interlayer impacting and shearing failure.
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Lee, Der-Her, Yi-En Yang, and Hung-Ming Lin. "Assessing slope protection methods for weak rock slopes in Southwestern Taiwan." Engineering Geology 91, no. 2-4 (May 2007): 100–116. http://dx.doi.org/10.1016/j.enggeo.2006.12.005.

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Schweizer, J., and B. Reuter. "Relating weak layer and slab properties to snow slope stability." Natural Hazards and Earth System Sciences Discussions 2, no. 7 (July 22, 2014): 4685–710. http://dx.doi.org/10.5194/nhessd-2-4685-2014.

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Abstract. Snow slope stability evaluation requires considering weak layer as well as slab properties – and in particular their interaction. We developed a stability index from snow micro-penetrometer measurements and compared it to 129 concurrent point observations with the compression test (CT). The index considers the SMP-derived micro-structural strength and the additional load which depends on the hardness of the surface layers. The new quantitative measure of stability discriminated well between point observations rated as either "poor" or "fair" (CT < 19) and those rated as "good" (CT ≥ 19). However, discrimination power within the intermediate range was low. We then applied the index to gridded snow micro-penetrometer measurements from 11 snow slopes to explore the spatial structure and possibly relate it to slope stability. Stability distributions on the 11 slopes reflected various possible strength and load (stress) distributions that naturally can occur. Their relation to slope stability was poor possibly because the index does not consider crack propagation. Hence, the relation between spatial patterns of point stability and slope stability remains elusive. Whereas this is the first attempt of a truly quantitative measure of stability, future developments should consider a better reference of stability and incorporate a measure of crack propagation.
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More sources

Dissertations / Theses on the topic "Weak slope"

1

Berg, Wiklund Hannes. "Submarine slope instability as a cause of contaminated sediment dispersal in Ångermanälven, Sweden." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-260790.

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This study aims at providing results for the analysis of the stratigraphy underlying contaminated sediments in Ångermanälven. The contaminated sediments, containing heavy metals and persistent organic pollutants, are derived from wastewater discharged into Ångermanälven from nearby paper and pulp industries. These sediments consist of cellulose fibres deposited as fibrebanks, or as fibre-rich sediments in the case where fibres are mixed with natural sediments. The importance of the underlying geology is enhanced since the contaminated sediments are deposited in an area where submarine landslides and slope movements occur frequently. In this study two sediment cores from a fibrebank in Ångermanälven are analysed. This is done in order to assess the risk of contaminants being dispersed in the ecosystem as a result of mass movements. Stratigraphic correlation with results from previous sediment core analysis in the middle of the estuary (International Ocean Discovery Program expedition #347) is achieved through magnetic susceptibility and density measurements of the sediment. Results show that silt layers and clay units situated throughout the estuary are potentially weak and geotechnical investigations are necessary to assess the risk of slope movements over these units. With further analysis of fibrebanks and the use of a vibro-corer, the contact between the fibrebanks and underlying sediment could be captured and further correlation establishing the stratigraphy of the estuary achieved.
Denna studie syftar till att tillhandahålla resultat och tolkningar för analys av den underliggande stratigrafin i Ångermanälven, som överlagrats av förorenade antropogena sediment. De förorenade sedimenten, vilka innehåller tungmetaller samt organiska föroreningar, härrör från avfallsvatten som släppts ut i älven från pappers- och massaindustrin. Sedimenten består av cellulosafibrer och har deponerats som fiberbankar eller fiberrika sediment, varav det sistnämnda består av cellulosa uppblandat med naturliga sediment. Eftersom fiberbankarna och de fiberrika sedimenten är avsatta i ett område där jordskred är vanligt förekommande, är den underliggande geologin som de miljöfarliga sedimenten är avsatta på av avsevärd betydelse. I studien ingår analys av två sedimentborrkärnor från en fiberbank i Ångermanälven. Syftet är att ta fram underlag för att möjliggöra riskbedömning kring spridning av föroreningarna som följd av potentiella jordskred, där de förorenade sedimenten är inblandade. Stratigrafisk korrelation med resultat från tidigare studier i den djupare delen av älven (International Ocean Discovery Program expedition #347) har uppnåtts genom jämförelse av två sedimentegenskaper: sedimentens respons av magnetisk susceptibilitet och densitet. Resultaten visar att silt- och lerlager som återfinns genom hela älven är potentiellt svaga. Vidare är geotekniska undersökningar nödvändiga för att bedöma risken för skred över dessa lager. Analys av fler fiberbankar och användning av ”vibro-corer” istället för kolvbaserad borrmetod, skulle möjliggöra analys av kontakten mellan fiberavsättningarna och den underliggande geologin, samt ytterligare tydliggöra stratigrafin i Ångermanälven.
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2

Milbers, Zoja. "Eigenvalue Problem for the 1-Laplace Operator." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1238150433158-43544.

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We consider the eigenvalue problem associated to the 1-Laplace operator. We define higher eigensolutions by means of weak slope and establish existence of a sequence of eigensolutions by using nonsmooth critical point theory. In addition, we deduce a new necessary condition for the first eigenvalue of the 1-Laplace operator by means of inner variations
Wir betrachten das zum 1-Laplace-Operator gehörige Eigenwertproblem. Wir definieren höhere Eigenlösungen mittels weak slope und weisen die Existenz einer Folge von Eigenlösungen nach, indem wir die nichtglatte Theorie kritischer Punkte anwenden. Zusätzlich leiten wir eine neue notwendige Bedingung für den ersten Eigenwert des 1-Laplace-Operators mittels innerer Variationen her
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3

Miramontes, García Elda. "Glissements sous-marins en mer Tyrrhénienne septentrionale et relations avec les dépôts contouritiques et turditiques : morphologie, stratigraphie, géotechnique et modélisation." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0083/document.

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Le Canal de Corse est un bassin confiné asymétrique localisé entre l’Île de Corse et l’Archipel de la Toscane, dont le flanc ouest est dominé par des processus turbiditiques et hémipélagiques et le flanc est par des mouvements en masse et des processus contouritiques. Le présent projet de doctorat a pour objectif de comprendre plus précisément les mécanismes contrôlant la formation des glissements sous-marins dans les contourites vaseuses (dépôts sédimentaires formés par les courants) pendant la période Plio-Quaternaire. Le vaste jeu de données disponible pour ce projet de doctorat inclut : la bathymétrie multifaisceaux, la sismique réflexion, les mesures géotechniques in situ, les mesures de vitesse de courant et les résultats d’un modèle hydrodynamique.Les contourites du Canal de Corse sont principalement composées de vase avec la présence de couches de sable formées par de forts courants de fond pendant les périodes de baisse du niveau marin. La croissance des dépôts contouritiques dépend de la disponibilité de sédiment fourni par le système turbiditique. Ainsi, cette croissance est lente pendant les périodes interglaciaires de haut niveau marin et rapide pendant les bas niveaux marins. Les courants contrôlent la morphologie du fond et génèrent les plastered drifts de forme convexe avec des pentes plus raides dans la partie avale, limités par une incision créée par les courants (moat). Le Pianosa Slump a été initié dans cette partie basse du plastered drift. Les moats pourraient être érodés préférentiellement pendant les périodes froides passées déclenchant ainsi certains glissements observés. Un autre facteur prédisposant l’instabilité de pente sur la Ride de Pianosa est la faiblesse d’une couche dont le comportement mécanique se caractérise par du radoucissement (perte de résistance avec le cisaillement). Cette propriété particulière est due à la présence de zéolites (produit de l’altération des roches volcaniques). Cette couche a formé la surface basale de rupture du Pianosa Slump. En conclusion, les deux principaux facteurs prédisposant la formation de glissements sous-marins sur la Ride de Pianosa sont : la morphologie du plastered drift avec une pente plus raide en aval et la couche faible composée de sédiment vaseux riche en zéolites. Le principal facteur déclenchant semble être l’érosion basale
The Corsica Trough is an asymmetric confined basin located between the Corsica Island and the Tuscan Ar-chipelago, with the western flank dominated by turbiditic and hemipelagic processes and the eastern flank by mass transport and contouritic processes. The present PhD project aims to develop our understanding of the mechanisms that control the formation of submarine landslides within muddy contourites (sediment deposits related to bottom currents) during the Plio-Quaternary. The broad data set available for this PhD project includes: multibeam bathymetry, seismic reflection data, sediment cores, in situ geotechnical measurements, current ADCP measurements and results of a hydrodynamic model.The contourites of the Corsica Trough are mainly composed of mud with sandy layers formed by enhanced bottom currents during periods of sea level fall. The contourite drifts grow slowly during sea level high-stands and rapidly during sea level low-stands due to the high sediment availability provided by an active turbidite sys¬tem. Bottom currents control the seafloor morphology and generate plastered drifts on the slope. This is a con¬vex-shaped contourite with steep slope gradients in the lower part limited by a moat (incision created by bottom currents). The Pianosa Slump was initiated in this lower part of the plastered drift. The occurrence of continuous erosive processes during cold periods could undercut the slope and trigger submarine landslides. Another predis¬posing factor for slope instability identified is the presence of a potential weak layer with a post-peak strain soften¬ing behaviour (strength loss with increasing strain). This particular property is caused by the presence of zeolites (product of the alteration of volcanic rocks). This layer originated the basal failure surface of the Pianosa Slump.In summary, the two main factors predispose the formation of submarine landslides in the Pianosa Ridge are: the morphology of the plastered drift with steep slopes in the lower part and a potential weak layer composed of zeolitic muddy sediment. The main triggering factor seems to be undercutting by bottom currents
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Logan, Spencer Carl. "Temporal changes in the spatial patterns of weak layer shear strength and stability on uniform slopes." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/logan/LoganS0805.pdf.

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Lin, Yi-Ling, and 林怡綾. "Effect of Weak Plane Orientation on Rock Slope Stability." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/30847911448885953020.

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碩士
國立中興大學
水土保持學系所
105
Except the shallow landsides that are associated with soils, other slope stability problems are associated with rock. The hill slopes of Taiwan are mainly composed of sedimentary rocks and metamorphic rocks. The bedding planes in the sedimentary rocks and the cleavage in the slate are weak planes with good consistency. Various orientations of these weak planes have different effects on the stability of rock slopes. We study the effects of orientations of planar and wedge weak planes on slope stability, using the software PLAXIS 3D.Simple slope model with various weak plane conditions are simulated. The jointed rock model with overall Mohr-Coulomb failure criterion (Iso-JRMC) is used to take the weak planes into account. The results show that for planar weak planes conditions, the most unfavorable conditions appear when the weak planes and the slope dip to the same direction, and the dip angle of the weak planes coincides with that of the slope or is equal to 90 °. For wedge weak planes conditions, the most unfavorable condition appear when the line of intersection of two sets of weak planes and the slope dip to the same direction, and the plunge of the line of intersection coincides with the dip of the slope or is equal to 90 ° . In particular, the higher the difference of the dip angles of the two sets of weak planes, the lower the safety factor of the slope obtained. For the studied cases, the rainfall induced rizes of groundwater tables from highest to lowest appear in the oblique slope, anaclinal slope, and dip slope.
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Tseng, Tai-Yuan, and 曾泰源. "Deformation of slope models with different orientations of weak planes." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5080036%22.&searchmode=basic.

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碩士
國立中興大學
水土保持學系所
107
Weak planes influence failure and deformation of slopes. We conducted experiments to simulate slopes of different orientations of weak planes, including cataclinal and analcinal slopes with 30ᵒ and 60ᵒ inclination angles of weak planes. We stacked artificial bricks to make small-sized slope models. The artificial bricks were made of gypsum, sand, cement and water with different weight proportion. In view of the scaling law, the artificial bricks were made less strength than natural rocks. The slope models were weakened under loading, resulting in deformation and final collapse. The slope deformation processes were photographed by a camera, and the displacement vector fields were analyzed using the Particle Image Velocimetry (PIV). The deformation and accumulated displacements were compared between slopes of different orientations of weak planes.
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7

Hsieh, Tusi-Ping, and 謝翠萍. "Impact of Material Spatial Variability on Slope Stabilityin Weak Rock." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/g734ds.

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碩士
朝陽科技大學
營建工程系碩士班
93
The impacts of material spatial variability were usually not considered in traditional slope stability analyses. However, most geotechnical materials are usually not uniform inside a slope. Thus, traditional ways of analyses were not very reasonable. On the other hand, most geological explorations used vertical borings. Horizontal and inclined borings were seldom performed unless required by the client. The information about the spatial variability is hard to obtain and usually used the previous studies to analyze. The objective of the study is to evaluate the impact of spatial variability on slopes in soft rocks. To understand the failure mechanisms, types of failures, and the size of the scale of fluctuation, d, on the slope stability. The material properties of Eagle Ford Shale from the canceled Superconducting Super Collider (SSC) project in Texas, USA were used as the basis for the numerical analyses using distinct element method based program, UDEC. The results of the analyses could be used for prevention of slope failure, future support system, and geotechnical exploration. The random field model is used to obtain the material spatial variability. Monte Carlo simulation, UDEC, and random field model are used to analyze the impact of material variability and the slope stability. A series of numerical experiments are performed to understand the effect of joint spacing, joint angle, and size of scale fluctuation. Failure types and mechanisms are also synthesized and evaluated. The following results can be obtained: (1) The probabilities of failure are all very high as the slope close to the unstable zone boundary. (2) As the horizontal size of d increased, the probabilities of failure for the slopes with joints remains about the same. However, for the slopes without joints, the probability of failure increases as the d increases. (3) The joints may become a non-uniform boundary for the weak materials to fail or shear as a slope becomes unstable. Thus, the slopes with joints yield less failures as d increases. Key word：Spatial Variability; Random Field Model; Weak Rock; Monte Carol Simulation; UDEC
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Wang, Chi-Li, and 王棋立. "Stability Analysis of an Undrained Slope with a Single Weak Layer." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/75046355635302325756.

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碩士
國立臺灣大學
土木工程學研究所
104
Slope stability analysis is an important engineering problem in Taiwan. We usually use Limit Equilibrium Method (LEM) or Finite Element Method (FEM) to analyze the safety of slope. However, this analysis process could cost lots of time in finding the weakest section of the slope if we want to get more accurate results. Thus, improving efficiency of the analysis is one of the most important issue of the slope stability. For real slope, it is common to see a situation that the slope slides along a weak layer which shear strength is weaker than the soil around it and causes failure, but it still does not have complete study to explain the effect of this situation. Therefore, in this study, we would consider the slope with a weak layer and analyze the influence of the slope stability. In addition, we built a number of the training sample of the slope and use ABAQUS 2D, FEM numerical software, to analyze these sample. After analyzing all training sample, we would use these results to build an analysis method of the slope with a weak layer by correction factor of Ns, support vector regression (SVR), and support vector classification (SVC). In the future, we hope that the analysis method can not only estimate slope stability more easily and more quickly, but also understand the type and the effect range of the slope failure, and get more accuracy assessment with slope stability.
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Wu, Hsin-Ming, and 吳昕明. "Influence of weak planes properties on deformation and failure behavior of slopes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/73659269133527164017.

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碩士
國立中興大學
水土保持學系所
105
Rock slope subjected to weathering and changes in groundwater levels will make the material gradually weakened, resulting in rock slope creeping, folding or progressive damage. The displacement of a rock slope does not necessarily mean that it reaches the condition of collapse. Events of typhoon and heavy rainfall will cause displacement, the phenomena may continue for more than a few years or even decades. Using the UDEC numerical analysis software, the strength reduction method, the gravity increase method and the groundwater level elevation method are used to study the effects of weak planes and spacing on slope behavior. In this study, we use equilibrium ratio and the number of calculation steps to define the failure condition. The cumulative displacements before collapse are compared for slopes with the same safety factor but different orientations and spacing of weak planes. The simulated deformation is consistent with the deformation behavior in literature. The results show that cataclinal slopes yield more displacement than cataclinal slope do. Moreover the more vertical the weak planes are, the more cumulative displacement obtained.
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Books on the topic "Weak slope"

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Martin, Derek, and Peter Stacey, eds. Guidelines for Open Pit Slope Design in Weak Rocks. CSIRO Publishing, 2018. http://dx.doi.org/10.1071/9781486303489.

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Weak rocks encountered in open pit mines cover a wide variety of materials, with properties ranging between soil and rock. As such, they can provide a significant challenge for the slope designer. For these materials, the mass strength can be the primary control in the design of the pit slopes, although structures can also play an important role. Because of the typically weak nature of the materials, groundwater and surface water can also have a controlling influence on stability. Guidelines for Open Pit Slope Design in Weak Rocks is a companion to Guidelines for Open Pit Slope Design, which was published in 2009 and dealt primarily with strong rocks. Both books were commissioned under the Large Open Pit (LOP) project, which is sponsored by major mining companies. These books provide summaries of the current state of practice for the design, implementation and assessment of slopes in open pits, with a view to meeting the requirements of safety, as well as the recovery of anticipated ore reserves. This book, which follows the general cycle of the slope design process for open pits, contains 12 chapters. These chapters were compiled and written by industry experts and contain a large number of case histories. The initial chapters address field data collection, the critical aspects of determining the strength of weak rocks, the role of groundwater in weak rock slope stability and slope design considerations, which can differ somewhat from those applied to strong rock. The subsequent chapters address the principal weak rock types that are encountered in open pit mines, including cemented colluvial sediments, weak sedimentary mudstone rocks, soft coals and chalk, weak limestone, saprolite, soft iron ores and other leached rocks, and hydrothermally altered rocks. A final chapter deals with design implementation aspects, including mine planning, monitoring, surface water control and closure of weak rock slopes. As with the other books in this series, Guidelines for Open Pit Slope Design in Weak Rocks provides guidance to practitioners involved in the design and implementation of open pit slopes, particularly geotechnical engineers, mining engineers, geologists and other personnel working at operating mines.
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Stacey, Peter, and Derek Martin. Guidelines for Open Pit Slope Design in Weak Rocks. Taylor & Francis Group, 2018.

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3

Evans, John H. The Human Gene Editing Debate. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780197519561.001.0001.

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Scholars have been debating the ethics of what is now called human gene editing for more than 60 years. This innovative book examines the historical debate and finds that it is set up as a slippery slope, with the ethically consensual acts of human gene editing at the top and the Brave New World or Gattaca at the dystopian bottom. More importantly, what stops the debate from slipping down the slope into unacceptable acts are agreed upon limits, which this book describes as barriers on the slope. The book describes what makes weak and strong barriers, and it shows how the first barriers were built on the slope. The first barrier was between modifying the existing human body (upslope of the barrier and acceptable) and modifying the species (downslope of the barrier and unacceptable). The second was between modifying to combat disease (upslope) and modifying to enhance a person’s abilities (downslope). The book shows how these barriers were weakened and finally knocked over, potentially allowing people to engage in any human gene editing they desired. The book then turns to describing barriers that could be built on the slope and also shows that many commonly advocated barriers are unstable. The debate about human gene editing, as well as many other debates in bioethics, would be greatly improved if participants would consider the insights of this book and only create defensible barriers.
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Book chapters on the topic "Weak slope"

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Ersöz, Timur, Merve Özköse, and Tamer Topal. "Slope Stability Assessment of Weak and Weathered Rocks with BQ System." In Understanding and Reducing Landslide Disaster Risk, 401–5. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60706-7_42.

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Xu, Yingzi, Fu Wei, Rikui Yan, and Jian Li. "Study on Slope Stability Effected by Creep Characteristics of Weak Interlayer in Clastic Rock Slope in Guangxi." In Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard, 81–89. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0128-5_10.

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3

Erguler, Zeynal Abiddin, Huseyin Karakus, I. Goktay Ediz, and Cem Sensogut. "Identification of Geotechnical Properties of Weak Rock Masses and Stockpiles at Tunçbilek Open Pit Mining and the Related Slope Stability Analyses." In Recent Advances in Geo-Environmental Engineering, Geomechanics and Geotechnics, and Geohazards, 129–31. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01665-4_30.

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Cella, Paulo, Luiz Castro, and Trevor Carter. "Mining Slopes in Weathered and Weak Rocks." In Soft Rock Mechanics and Engineering, 373–406. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29477-9_13.

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Chen, Zhenlin, and Nanqi Huang. "Analysis of Failure Mechanism of Slopes with a Horizontal Weak Intercalation Under Earthquakes." In Advancing Culture of Living with Landslides, 669–77. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53498-5_77.

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L’Heureux, Jean-Sebastien, Oddvar Longva, Alois Steiner, Louise Hansen, Mark E. Vardy, Maarten Vanneste, Haflidi Haflidason, et al. "Identification of Weak Layers and Their Role for the Stability of Slopes at Finneidfjord, Northern Norway." In Submarine Mass Movements and Their Consequences, 321–30. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2162-3_29.

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Martinez-Bofill, Joan, Jordi Corominas, and Albert Soler. "Behaviour of the Weak Rock Cut Slopes and Their Characterization Using the Results of the Slake Durability Test." In Engineering Geology for Infrastructure Planning in Europe, 405–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-39918-6_47.

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Yardimci, Ahmet Gunes, and Celal Karpuz. "Fuzzy Rock Mass Rating." In Advances in Civil and Industrial Engineering, 97–131. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-2709-1.ch003.

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Rock mass classification systems are the most commonly used empirical tools in preliminary design of rock slopes. In spite of numerous advantages, these systems lack the common drawbacks of classification systems originated from uncertainties. These drawbacks may lead to similar or so close quality scores for different rock mass properties. Fuzzy Sets is a rising trend in describing Geomechanical problems by including the expert opinion. Especially in the case of weak rocks it allows prediction of more realistic rock mass quality scores. Although the empirical systems form a basis for the preliminary slope stability investigation, slope height and overall slope angle are still two missing important characteristic slope parameters. However, there have been some attempts to describe the graphical presentation of rock quality score, slope height and overall slope angle relation. These charts are called as slope performance charts. This chapter presents a short review on integration of Fuzzy RMR with these charts to provide a useful modification for the case of weak rock slopes.
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Trandafir, A., and M. Popescu. "Weak interlayers effects on seismic performance of a deepwater slope." In Frontiers in Offshore Geotechnics III, 1011–16. CRC Press, 2015. http://dx.doi.org/10.1201/b18442-148.

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Abe, K., S. Nakamura, and H. Nakamura. "Large deformation analysis of slope models together with weak layers on shaking table by using Material Point Method." In Computer Methods and Recent Advances in Geomechanics, 1805–10. CRC Press, 2014. http://dx.doi.org/10.1201/b17435-320.

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Conference papers on the topic "Weak slope"

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Nishimura, Shinichi, Tatsuya Ueda, Kazunari Imaide, Toshifumi Shibata, and Takayuki Shuku. "Identification Procedure of Shallow Weak Layer in Weathered Slope." In Proceedings of the 6th International Symposium on Reliability Engineering and Risk Management. Singapore: Research Publishing Services, 2018. http://dx.doi.org/10.3850/978-981-11-2726-7_ctc304s1grr14.

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Martin, Derek, and Peter Stacey. "Pit slopes in weathered and weak rocks." In 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2013. http://dx.doi.org/10.36487/acg_rep/1308_0.1_martin.

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Pells, Philip. "A note on design parameters for in-pit coal waste dumps in weak rock." In First Asia Pacific Slope Stability in Mining Conference. Australian Centre for Geomechanics, Perth, 2016. http://dx.doi.org/10.36487/acg_rep/1604_34_pells.

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Nagatani, Keiji, Takahiro Noyori, and Kazuya Yoshida. "Development of multi-D.O.F. tracked vehicle to traverse weak slope and climb up rough slope." In 2013 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2013). IEEE, 2013. http://dx.doi.org/10.1109/iros.2013.6696759.

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Narendranathan, Sanjive, Simon McBeath, Kweku Ayemin, and Eng Lee. "An alternate approach for deriving rock slope shear strength parameters within weak jointed rock masses." In First Asia Pacific Slope Stability in Mining Conference. Australian Centre for Geomechanics, Perth, 2016. http://dx.doi.org/10.36487/acg_rep/1604_50_narendranathan.

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Castro, Luiz, Jose Carvalho, and Gilvan Sá. "Discussion on how to classify and estimate strength of weak rock masses." In 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2013. http://dx.doi.org/10.36487/acg_rep/1308_08_castro.

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Fournier, Mathew, Robert Mercer, Daniel Yang, and Justine Miller. "Characterisation and stability modelling in weak rock masses of the Robinson Mine." In 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2013. http://dx.doi.org/10.36487/acg_rep/1308_39_fournier.

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Dinç, Ö., Z. Karaca, and N. Işık. "The effects of strength parameters on slope failure mechanisms in weak rocks." In The 2016 Isrm International Symposium, Eurock 2016. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315388502-102.

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Bubel, Julian, Marc-André Pick, and Jürgen Grabe. "Stability of Artificial Subaqueous Slopes in Sandy Soils Under Wave Loads." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41827.

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Shallow foundation structures in marine environments can rarely be placed on top of the sea floor. Weak soils usually need to be excavated to place the structure on more stable ground. Steep but stable slopes of the resulting pit meet both economic and ecologic aims as they minimise material movement and sediment disturbance. This paper focuses changes of geometry of submarine slopes in non-cohesive soils (erosion, sedimentation, breach failure, liquefaction failure) due to surface waves. After Terzaghi the angle between slope and the horizontal of the ground surface of cohesionless soil is at most equal to the critical state friction angle, as obviously true for dry soil. However, it can be observed that natural submarine slopes of sandy soils are always mildly sloped. During the construction of artificial submarine pits under offshore conditions it should be considered that the long-term slope-inclination is less than onshore due to hydrodynamic actions (e. g. flow, waves, earthquakes). Large surface waves cause excess pore water pressures within the soil body, leading to a reduction of effective stresses and in case of submarine slopes to changes of the slope geometry depending on wave length L, wave height H, water depth h and soil properties (permeability k, relative density Dr). During our preliminary work we investigated such processes based on the coupling of linear wave theory and linear quasistatic consolidation theory (e.g. [1]). With the help of numerical modelling we solved corresponding equations considering also materially nonlinear consolidation. However, deformations were always limited by used Lagrangian-FEM. Recent developments at our Institute enable the use of an Eulerian-FEM approach with an u-p-Formulation for fully saturated soil [2]. This allows larger deformations of the subaqueous slope to be numerically investigated.
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Trani, Domininc, Jason Hellmuth, and Jon Thompson. "Modelled versus observed open cut performance in weak transition rock: the Dubbo Quarry case study." In 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2020. http://dx.doi.org/10.36487/acg_repo/2025_56.

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