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Journal articles on the topic 'Suction Seepage'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Panchali, Chakraborty. "Study of Flow Field Around Abutment Under Suction Seepage." International Journal of Emerging Science and Engineering (IJESE) 13, no. 6 (2025): 32–39. https://doi.org/10.35940/ijese.E4623.13060525/.

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<strong>Abstract:</strong> The present study investigates the effects of side, vertical, and a combination of both side and vertical suction seepage on the flow patterns in a laboratory flume. To examine streamwise, transverse, and vertical components, an Acoustic Doppler Velocimeter (ADV) is used to analyze the complete velocity readings. The results demonstrate that near-bed velocity is relatively higher under suction seepage conditions than in other conditions. The impact of side suction seepage is primarily in the lower area next to the side wall. The vertical and transverse components of

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2

Panchali, Chakraborty. "Study of Flow Field Around Abutment Under Suction Seepage." International Journal of Emerging Science and Engineering (IJESE) 13, no. 6 (2025): 32–39. https://doi.org/10.35940/ijese.E4623.13060525.

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<strong>Abstract: </strong>The present study investigates the effects of side, vertical, and a combination of both side and vertical suction seepage on the flow patterns in a laboratory flume. To examine streamwise, transverse, and vertical components, an Acoustic Doppler Velocimeter (ADV) is used to analyze the complete velocity readings. The results demonstrate that near-bed velocity is relatively higher under suction seepage conditions than in other conditions. The impact of side suction seepage is primarily in the lower area next to the side wall. The vertical and transverse components of

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3

Wang, He, Rui Wang, and Jian-Min Zhang. "Solid-Fluid Coupled Numerical Analysis of Suction Caisson Installation in Sand." Journal of Marine Science and Engineering 9, no. 7 (2021): 704. http://dx.doi.org/10.3390/jmse9070704.

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Suction caissons are widely used foundations in offshore engineering. The change in excess pore pressure and seepage field caused by penetration and suction significantly affects the soil resistance around the caisson wall and tip, and also affects the deformation of the soil within and adjacent to the caisson. This study uses Arbitrary Lagrangian–Eulerian (ALE) large deformation solid-fluid coupled FEM to investigate the changes in suction pressure and the seepage field during the process of the suction caisson installation in sand. A nonlinear Drucker-Prager model is used to model soil, whil

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4

Chakraborty, Panchali, and Prof Abdul K. Barbhuiya. "Study of Flow Field Around Abutment Under Suction Seepage." International Journal of Emerging Science and Engineering 13, no. 6 (2025): 32–39. https://doi.org/10.35940/ijese.e4623.13060525.

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The present study investigates the effects of side, vertical, and a combination of both side and vertical suction seepage on the flow patterns in a laboratory flume. To examine streamwise, transverse, and vertical components, an Acoustic Doppler Velocimeter (ADV) is used to analyze the complete velocity readings. The results demonstrate that near-bed velocity is relatively higher under suction seepage conditions than in other conditions. The impact of side suction seepage is primarily in the lower area next to the side wall. The vertical and transverse components of the flow mostly stay negati

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5

Qi, Jian Feng, Xue Lin Song, and An Long Li. "The Soil Plug Failure Analysis during the Suction Penetration of Bucket Foundation." Advanced Materials Research 243-249 (May 2011): 3092–97. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.3092.

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A physical model test is conducted to study the hydraulic gradient and soil plug development during the suction penetration of bucket foundation in the silts. Furthermore, a FEM simulation is carried out by changing the geotechnical parameters and constitutive model to deeply study the suction penetration mechanism. Through the comprehensive analysis, the results indicate that the seepages inside and outside the bucket foundation are the direct reasons for the formation of soil plugs, and that there are the high hydraulic gradient and the safety mechanism preventing soil flow failure for the s

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6

Koteras, Aleksandra Katarzyna, and Lars Bo Ibsen. "Medium-scale laboratory model of mono-bucket foundation for installation tests in sand." Canadian Geotechnical Journal 56, no. 8 (2019): 1142–53. http://dx.doi.org/10.1139/cgj-2018-0134.

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Design implications of suction installation of bucket foundations are still not well understood. During suction installation, applied suction under the bucket lid results in seepage flow through the surrounding sand. Seepage flow plays a pivotal role in reducing the penetration resistance, allowing for full penetration despite the initial large soil resistance. However, loosening of the inside soil plug might be problematic when the soil approaches its failure stage, due to soil piping or extensive soil heave inside the bucket foundation. To better understand the interaction between the soil a

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7

Xie, Yi, De Zhou, Hong Liao, and Jianqun Zhu. "Failure Mode of Tunnel Face Under Transient Unsaturated Seepage with Temperature Influence." Mathematics 13, no. 8 (2025): 1311. https://doi.org/10.3390/math13081311.

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The seepage caused by heavy rainfall and storm runoff is not a static phenomenon. On the contrary, it is a dynamic process known as unsaturated transient seepage. Under the condition, the spatiotemporal variations in suction stress cannot be overlooked. With the development of tunnel mechanics, there has been an emergence of tunnels affected by high ground temperatures or temperature influences, highlighting the necessity of incorporating temperature effects into the analysis. This article proposes a new framework for the spatiotemporal response of tunnel face safety to temperature-affected an

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8

Park, Min Cheol. "Behavior analysis by model slope experiment of artificial rainfall." Natural Hazards and Earth System Sciences 16, no. 3 (2016): 789–800. http://dx.doi.org/10.5194/nhess-16-789-2016.

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Abstract. In this study, we performed a model slope experiment with rainfall seepage, and the results were compared and verified with the unsaturated slope stability analysis method. In the model slope experiment, we measured the changes in water content and matric suction due to rainfall seepage, and determined the time at which the slope failure occurred and the shape of the failure. In addition, we compared and verified the changes in the factor of safety and the shape of the failure surface, which was calculated from the unsaturated slope stability analysis with the model experiment. From

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9

Park, M. C. "Behavior analysis by model slope experiment of artificial rainfall." Natural Hazards and Earth System Sciences Discussions 3, no. 6 (2015): 4159–87. http://dx.doi.org/10.5194/nhessd-3-4159-2015.

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Abstract. In this study, we performed a model slope experiment with rainfall seepage, and the results were compared and verified with the unsaturated slope stability analysis method. In the model slope experiment, we measured the changes in water content and matric suction due to rainfall seepage, and determined the time at which the slope failure occurred and the shape of the failure. In addition, we compared and verified the changes in the factor of safety and the shape of the failure surface, which was calculated from the unsaturated slope stability analysis with the model experiment. From

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10

He, Zhong Ming, Xin Tong Zhao, Ling Zeng, and Yan Qi Qin. "The Stability Studies of Soil Slope under the Action of Short-Time Heavy Rainfall." Applied Mechanics and Materials 170-173 (May 2012): 1192–95. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.1192.

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Based on the saturated-unsaturated seepage theory and the unsaturated shear strength, the numerical simulations of soil slope seepage field in short-time heavy rainfall was carried out, and on this basis calculated the slope safety coefficient at different rainfall time. The research shows that: the rainfall infiltration will cause the slope soil matrix suction decreased or even disappeared which leads to the slope shear strength reduce; Rainwater infiltration increases the transient water load of infiltration area; and under the dual role of matrix suction reduction and transient water load i

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11

Blatz, James A., Nelson J. Ferreira, and James Graham. "Effects of near-surface environmental conditions on instability of an unsaturated soil slope." Canadian Geotechnical Journal 41, no. 6 (2004): 1111–26. http://dx.doi.org/10.1139/t04-058.

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In 1999, after a period of extensive rainfall, two shallow slope failures developed in the right-of-way of Provincial Road 259 near Virden, Manitoba. The rainfall caused dissipation of soil suction in the near-surface soil, thereby reducing shear resistance and triggering failure. A research project was initiated between the Geotechnical Group at the University of Manitoba and the Manitoba Department of Highways and Transportation to assess the mechanism of failure. The project included a field investigation program, laboratory testing program, and advanced numerical modeling to identify the c

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12

Zhang, L. L., D. G. Fredlund, L. M. Zhang, and W. H. Tang. "Numerical study of soil conditions under which matric suction can be maintained." Canadian Geotechnical Journal 41, no. 4 (2004): 569–82. http://dx.doi.org/10.1139/t04-006.

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The effect of negative pore-water pressure is often ignored in slope stability studies. There is a perception among geotechnical engineers that negative pore-water pressures will dissipate with rainfall infiltration and cannot be relied upon in design considerations. The objective of this paper is to illustrate that under certain conditions soil suction can be maintained. Based on the theory of infiltration and seepage through a saturatedunsaturated soil system, steady state and transient finite element seepage analyses were conducted using Seep/W on a 20 m high slope inclined at 30°. The res

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13

Park, Sunji, Shah Neyamat Ullah, Youngho Kim, Yuxia Hu, and Muhammad Shazzad Hossain. "Seepage induced displacements of suction caissons: FE analysis." Computers and Geotechnics 152 (December 2022): 105004. http://dx.doi.org/10.1016/j.compgeo.2022.105004.

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14

Butticè, Vincenzo, Alessio Ferrari, Carmine G. Gragnano, and Guido Gottardi. "Hydro-mechanical behaviour of a sandy silt from a river embankment." E3S Web of Conferences 195 (2020): 01033. http://dx.doi.org/10.1051/e3sconf/202019501033.

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The paper presents the results of an experimental campaign aimed at characterizing the hydro-mechanical behaviour of a sandy silt from a river embankment. Due to continuous river level fluctuations and changing climatic and environmental conditions, flood embankment materials experience frequent variations in degree of saturation and suction values. Such variations strongly impact the earthwork performance both in terms of seepage and stability conditions. For these reasons, a detailed characterization of the material behaviour in unsaturated conditions was carried out. Experiments were design

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15

Xie, Liquan, Shili Ma, and Tiantian Lin. "The Seepage and Soil Plug Formation in Suction Caissons in Sand Using Visual Tests." Applied Sciences 10, no. 2 (2020): 566. http://dx.doi.org/10.3390/app10020566.

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The rapid development of offshore wind energy in China is becoming increasingly relevant for movement toward green development. This paper presents the results of visual tests of a suction caisson used as foundation for offshore wind turbines. The distribution of hydraulic gradients of sand at the mudline in the caisson was obtained to find out the relationship with the heights of soil plugs. The relationship equation was proposed and obtained by using quadratic regression, guiding project designs, and construction. It was found that there was no soil plug in the caisson when small suction was

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16

Lin, Shu, Dengfeng Fu, Zefeng Zhou, Yue Yan, and Shuwang Yan. "Numerical Investigation to the Effect of Suction-Induced Seepage on the Settlement in the Underwater Vacuum Preloading with Prefabricated Vertical Drains." Journal of Marine Science and Engineering 9, no. 8 (2021): 797. http://dx.doi.org/10.3390/jmse9080797.

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Vacuum preloading combined with prefabricated vertical drains (PVDs) has the potential to improve the soft sediments under water, however, its development is partly limited by the unclear understanding of the mechanism. This paper aims to extend the comprehension of the influential mechanism of overlapping water in the scenario of underwater vacuum preloading with PVDs. The systematic investigations were conducted by small strain finite element drained analyses, with the separated analysis schemes considering suction-induced consolidation, seepage and their combination. The development of sett

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17

Liu, Jian Hua, Zhi Min Chen, and Wei He. "Research of Slope Stability Analysis Considering Rainfall Infiltration." Applied Mechanics and Materials 204-208 (October 2012): 487–91. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.487.

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Based on the saturated-unsaturated seepage theory and considering soil-hydraulic permeability coefficient characteristic curves of rock slope, the variation of suction in unsaturated region and transient saturated zone formation of rock slope were analyzed. Combined with engineering example, the strength reduction methods were adopted to analyzing the rock slope stability influence factors considering unsaturated seepage with different rainfall intensity and duration. The results show that the flow domain owing to rainfall infiltration mainly appears surface layer region of slope. The rainfall

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18

Sattler, Pamela, and D. G. Fredlund. "Use of thermal conductivity sensors to measure matric suction in the laboratory." Canadian Geotechnical Journal 26, no. 3 (1989): 491–98. http://dx.doi.org/10.1139/t89-063.

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The measurement of soil suction is pivotal to the application of soil mechanics principles in geotechnical engineering practice related to unsaturated soils. Volume change, shear strength, and seepage analyses all require an understanding of the matric suction in the soil. This note summarizes the use of thermal conductivity sensors to measure matric suction in the laboratory. The thermal conductivity sensor is described along with its mode of operation. A brief description is given of the procedure for calibrating thermal conductivity sensors using a pressure plate apparatus. The measurement

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19

Sun, Yongshuai, Zhihui Li, Ke Yang, Guihe Wang, and Ruilin Hu. "Analysis of the Influence of Water Level Change on the Seepage Field and Stability of a Slope Based on a Numerical Simulation Method." Water 15, no. 2 (2023): 216. http://dx.doi.org/10.3390/w15020216.

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River floods, dammed lake flood discharge, reservoir discharge, seawater recession, etc. all cause the water level in front of a slope to drop, which changes the original steady-state seepage field in the soil, leading to harmful slope instability. To study this phenomenon, a numerical model was established through theoretical analysis combined with the coupling of the Seep/W and Slope/W modules of the GeoStudio finite element software, and the numerical model was verified by the model test results of indoor medium sand and silt. This paper focuses on the effects when the water level in front

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20

Geng, Xueyu, Buddhima Indraratna, and Cholachat Rujikiatkamjorn. "Effectiveness of partially penetrating vertical drains under a combined surcharge and vacuum preloading." Canadian Geotechnical Journal 48, no. 6 (2011): 970–83. http://dx.doi.org/10.1139/t11-011.

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This paper considers the consolidation of a layer of clay in which partially penetrating prefabricated vertical drains (PVDs) are used in conjunction with a combined surcharge and vacuum preloading. Analytical solutions for partially penetrating PVDs are derived by considering vacuum pressure (suction), time-dependent embankment surcharge, well resistance, and smear zone. Three-dimensional seepage with a virtual vertical drain is assumed to reflect real seepage into the soil beneath the tip of a PVD. Analytical solutions were then used to examine the length of the vertical drain and vacuum pre

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21

Ning, Chongru, Weijiang Luo, Pengyu Zhu, and Cong Liu. "Progress in Fracturing and Displacement Technology." Academic Journal of Science and Technology 6, no. 2 (2023): 159–63. http://dx.doi.org/10.54097/ajst.v6i2.9877.

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 This paper summarizes the exploration and development process of low-permeability tight reservoirs in major oilfields in China, and divides the development of fracturing and flooding technology of low-permeability tight reservoirs in domestic oilfields into four stages: matrix seepage and oil production, fracture matrix dynamic seepage oil production, fracture network fracturing storage and seepage oil production, and fracturing flooding oil simmering and oil production. At the same time, six aspects of fracturing and displacement technology are clarified: (1) volumetric fracturing tech

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22

Wu, Huanjiang, Yimin Wu, Hong Liao, and Jianqun Zhu. "Stability of 3D Tunnel Faces in Inclined Layered Soils Under Steady-State Unsaturated Seepage Based on Grey Relational Analysis." Applied Sciences 15, no. 5 (2025): 2453. https://doi.org/10.3390/app15052453.

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This paper aims to estimate the stability of tunnel faces in inclined layered soils under steady unsaturated seepage conditions, comparing the degree of correlation between the stability of the tunnel face and the influence of three types of parameters: unsaturated soil parameters, spatial geometric parameters of soil stratification, and other relevant factors. The study leverages the suction head distribution in multi-layered unsaturated soils, deriving a new formula to compute the effects of steady-state seepage forces with matric suction distribution in inclined stratified soil layers. A th

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23

Li, X., L. M. Zhang, and D. G. Fredlund. "Wetting front advancing column test for measuring unsaturated hydraulic conductivity." Canadian Geotechnical Journal 46, no. 12 (2009): 1431–45. http://dx.doi.org/10.1139/t09-072.

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Unsaturated hydraulic conductivity is the primary soil parameter required when performing seepage analyses for unsaturated–saturated soil systems. Unsaturated hydraulic conductivity is also one of the most difficult parameters to measure because of the time involved and the limited suction measurement range (e.g., 0∼1500 kPa in a test using the steady-state method). In this study, a new wetting front advancing method was developed for measuring unsaturated hydraulic conductivity. The wetting front advancing method simulates and monitors a soil wetting process through a large-scale soil column.

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24

Chen, Aijun, Yiqing Zhou, Rulin Song, Yangrong Song, Hanlie Cheng, and David Cadasse. "Complexity Model for Predicting Oil Displacement by Imbibition after Fracturing in Tight-Oil Reservoirs." Complexity 2023 (May 5, 2023): 1–9. http://dx.doi.org/10.1155/2023/2140631.

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With the increasing difficulty of conventional oil and gas exploration and development, oil and gas resources have developed from conventional to unconventional, and the exploration and development of tight-oil reservoirs are highly valued. In view of the complexity of the influencing factors of oil-water spontaneous seepage after fracturing and the instability of reservoir recovery, this paper takes the tight sandstone reservoir of Yanchang Formation in the southern Ordos Basin as the research object. Based on the micro-nano pore throat characteristics of tight sandstone, the seepage experime

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25

Guo, Yunhong, Songtao Li, Junzhen Zhang, Baolin Wang, and Yanlong Gao. "Study on the Seepage Mechanism of Rainwater on Granite Residual Soil Cut Slopes." Advances in Civil Engineering 2023 (February 15, 2023): 1–7. http://dx.doi.org/10.1155/2023/1259527.

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In order to study the seepage process of rainwater on granite residual soil cut slopes, a numerical model for seepage analysis of granite residual soil cut slopes was established. Then, by applying the rainfall boundary condition, the seepage path of rainwater on the slope was analyzed under the condition of rainfall infiltration. Finally, during rainwater seepage, the volumetric water content and pore-water pressure change characteristics inside the slope were analyzed, and the seepage mechanism of rainwater in the granite residual soil slope was revealed. The results show that, under the con

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26

Yang, Bei Bei, Yong Chen, and Shu Ang Wei. "The Fluid-Solid Coupling Analysis of Three-Dimensional Slope Based on ABAQUS." Applied Mechanics and Materials 353-356 (August 2013): 663–68. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.663.

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The coupling analysis has been the focus of study in the practical engineering; its assumed that the material is porous medium in the classical seepage mechanics, processing seepage problems as a single field without considering the coupling factor. The fluid-solid coupling analysis, in short, is the interrelationship between the seepage field and the stress field. Based on the basic theory of coupling model analysis and the establishment of coupling model in the finite element calculation software ABAQUS, this paper analyses the interrelationship between the seepage field and the stress field

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27

DEY, SUBHASISH, TUSHAR K. NATH, and SUJIT K. BOSE. "Submerged wall jets subjected to injection and suction from the wall." Journal of Fluid Mechanics 653 (April 27, 2010): 57–97. http://dx.doi.org/10.1017/s0022112010000182.

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This paper presents an experimental study on turbulent flow characteristics in submerged plane wall jets subjected to injection (upward seepage) and suction (downward seepage) from the wall. The vertical distributions of time-averaged velocity components, turbulence intensity components and Reynolds shear stress at different horizontal distances are presented. The horizontal distributions of wall shear stress determined from the Reynolds shear stress profiles are also furnished. The flow field exhibits a decay of the jet velocity over a horizontal distance. The wall shear stress and the rate o

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28

Leung, A. K., and C. W. W. Ng. "Analyses of groundwater flow and plant evapotranspiration in a vegetated soil slope." Canadian Geotechnical Journal 50, no. 12 (2013): 1204–18. http://dx.doi.org/10.1139/cgj-2013-0148.

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Understanding seasonal hydrogeological responses of vegetated soil slopes is vital to slope stability because pore-water pressure (PWP) varies from positive values upon rainfall in wet seasons to negative values upon plant evapotranspiration (ET) in dry seasons. There are, however, few case histories that report seasonal performance of vegetated soil slopes. In this study, a vegetated slope situated in Hong Kong was instrumented to analyse (i) groundwater flow during rainfall in the wet season and (ii) effects of plant ET on PWP in the dry season. Two- and three-dimensional anisotropic transie

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29

Yan, Guanxi, Thierry Bore, Zi Li, Stefan Schlaeger, Alexander Scheuermann, and Ling Li. "Application of Spatial Time Domain Reflectometry for Investigating Moisture Content Dynamics in Unsaturated Loamy Sand for Gravitational Drainage." Applied Sciences 11, no. 7 (2021): 2994. http://dx.doi.org/10.3390/app11072994.

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The strength of unsaturated soil is defined by the soil water retention behavior and soil suction acting inside the soil matrix. In order to obtain the suction and moisture profile in the vadose zone, specific measuring techniques are needed. Time domain reflectometry (TDR) conventionally measures moisture at individual points only. Therefore, spatial time domain reflectometry (spatial TDR) was developed for characterizing the moisture content profile along the unsaturated soil strata. This paper introduces an experimental set-up used for measuring dynamic moisture profiles with high spatial a

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30

Zhao, Youxin, Qingjie Qi, Xinlei Jia, Yingjie Liu, and Jingwen Zhang. "Numerical Simulation of Coal Spontaneous Combustion around a Borehole Induced by Negative Pressure Gas Drainage." Geofluids 2021 (August 7, 2021): 1–11. http://dx.doi.org/10.1155/2021/3938243.

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The suction negative pressure is an important factor affecting the spontaneous combustion of coal around a borehole. Because the mechanism of suction negative pressure in the gas extraction process remains unclear, a constant suction negative pressure is often used in coal mines, leading to a low efficiency of gas extraction in deep coal seams. Moreover, the coal body easily undergoes spontaneous combustion during the extraction process, which is not conducive to safe mining. To study the effect of the suction negative pressure near the end sealing section, a numerical model of the combustion

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31

Han, Bo, Hong Jian Liao, Kyoji Sassa, and Fa Wu Wang. "Reliability Analysis for Effects of Reservoir Water Level Change on Embankment Dam." Key Engineering Materials 340-341 (June 2007): 1327–32. http://dx.doi.org/10.4028/www.scientific.net/kem.340-341.1327.

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This paper is mainly concerned with the saturated-unsaturated seepage analysis of embankment dams based on unsaturated soil theory and the reliability analysis of embankment dam based on conception of reliability. The transient seepage due to change of the water level is calculated using the finite element method based on unifying saturated-unsaturated seepage governing equations. The transient pore water pressures are then used for stability analyses of embankment dam considering the effects of suction on shear strength of unsaturated soils. Meanwhile, combined with reliability computation, t

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32

Leung, A. K., V. Kamchoom, and C. W. W. Ng. "Influences of root-induced soil suction and root geometry on slope stability: a centrifuge study." Canadian Geotechnical Journal 54, no. 3 (2017): 291–303. http://dx.doi.org/10.1139/cgj-2015-0263.

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Soil bioengineering using vegetation has been recognised as an environmentally friendly solution for shallow slope stabilization. Plant transpiration induces suction in the soil, but its effects on slope stability are often ignored. This study investigates the influences of transpiration-induced suction and mechanical reinforcement of different root geometries (i.e., tap- and heart-shaped) to the slope stability subjected to an intense rainfall with an intensity of 70 mm/h (prototype scale; corresponding to a return period of 1000 years), via centrifuge modelling. New model roots that have sca

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33

Huang, Zhen, Li Shi, Zefeng Zhou, and Yuanqiang Cai. "Analytical solution for suction-induced seepage flow during suction bucket installation in multilayered soil with anisotropic permeability." Computers and Geotechnics 171 (July 2024): 106393. http://dx.doi.org/10.1016/j.compgeo.2024.106393.

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34

David Suits, L., TC Sheahan, RG Robinson, TS Tan, and FH Lee. "A Comparative Study of Suction-Induced Seepage Consolidation Versus Centrifuge Consolidation." Geotechnical Testing Journal 26, no. 1 (2003): 9919. http://dx.doi.org/10.1520/gtj11109j.

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35

Zhao, Jipeng, Yongan Ma, and Dayong Li. "Penetration of a modified suction caisson in sand considering seepage effect." Ocean Engineering 327 (May 2025): 120997. https://doi.org/10.1016/j.oceaneng.2025.120997.

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36

Huang, Feng, Jianguo Lyu, Guihe Wang, and Hongyan Liu. "One-Dimensional Vacuum Steady Seepage Model of Unsaturated Soil and Finite Difference Solution." Mathematical Problems in Engineering 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/9589638.

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Vacuum tube dewatering method and light well point method have been widely used in engineering dewatering and foundation treatment. However, there is little research on the calculation method of unsaturated seepage under the effect of vacuum pressure which is generated by the vacuum well. In view of this, the one-dimensional (1D) steady seepage law of unsaturated soil in vacuum field has been analyzed based on Darcy’s law, basic equations, and finite difference method. First, the gravity drainage ability is analyzed. The analysis presents that much unsaturated water can not be drained off only

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37

Xie, Yi, Hong Liao, and De Zhou. "Face Stability Analysis for Tunnels under Steady Unsaturated Seepage and Inhomogeneity Conditions." Applied Sciences 14, no. 20 (2024): 9377. http://dx.doi.org/10.3390/app14209377.

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In the field of tunnels, the stability of tunnel faces is generally considered in dry, saturated and homogeneous soils. However, the actual condition of some soils has been found to be inhomogeneous, with unsaturated seepage. In this paper, an analytical method is applied to estimate the safety factor when the supporting force at the tunnel face is zero under steady unsaturated seepage and inhomogeneous conditions. This method combines kinematic limit analysis techniques with strength reduction techniques; an efficient stress formulation utilizing suction stress is employed to determine the ap

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38

Zhao, Siyi, Zhenming Shi, Ming Peng, and Yanni Bao. "Stability Analysis of Expansive Soil Slope Considering Seepage Softening and Moistening Expansion Deformation." Water 12, no. 6 (2020): 1678. http://dx.doi.org/10.3390/w12061678.

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Expansive soil is a kind of clay soil that expands rapidly after being immersed in water and shrinks significantly after losing water. The expansive soil slopes exposed to the atmosphere are in the process of continuous dry and wet cycles and are extremely unstable under the conditions of rainfall. Based on saturated-unsaturated seepage theory, the unsaturated seepage process and humidification process of the expansive soil slope under rainfall were simulated, and a related FORTRAN language program was developed. The effects of matrix suction changes, seepage softening, and moistening expansio

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39

Dong, Jianjun, Di Yang, Yuan Mei, and Ke Gao. "Study on safety and stability of high altitude dump under severe drying-wetting alternation." PLOS ONE 17, no. 8 (2022): e0273365. http://dx.doi.org/10.1371/journal.pone.0273365.

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This study aimed to reveal the impact of the severe drying-wetting process on the safety and stability of high-altitude dumps. Numerical calculations were conducted for the open mining dump of limestone mines for cement in high-altitude mining areas. The distribution law equation of the matric suction and the shear strength equation were imported for unsaturated soil based on the unsaturated-saturated seepage theory. Therefore, the evolution characteristics of the unsaturated-saturated seepage field and the stability of the dump were studied under severe drying-wetting. The results indicated t

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Widomski, Marcin K., Iwona Pawelec, Ajay Kumar, and Grzegorz Łagód. "Numerical modelling of water percolation through mortar-based connection of concrete pipes." MATEC Web of Conferences 252 (2019): 05014. http://dx.doi.org/10.1051/matecconf/201925205014.

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This paper presents an attempt to numerical modelling of water seepage through the connection of two concrete pipes, commonly used in the past in construction of sanitary and stormwater sewerage systems, sealed by three types of different cement-based mortars. The 2D numerical calculations were made by means of the commercial modelling software FEFLOW, WASY-DHI, especially popular in soil and environmental science. The required input data for the developed numerical model, including saturated hydraulic conductivity and retention characteristics of tested mortars, were obtained during the condu

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Zhong, Xingming, Fan Yang, Fuming Wang, Chengchao Guo, Yunsong Ji, and Xuemei Wang. "Research on penetration characteristics of suction foundation based on seepage in sand." Applied Ocean Research 158 (May 2025): 104578. https://doi.org/10.1016/j.apor.2025.104578.

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Abu-Zreig, Majed M., Amjed M. Zraiqat, and Mohammed Abd Elbaset. "Seepage Rate from Ceramic Pitchers under Positive and Negative Hydraulic Head." Applied Engineering in Agriculture 34, no. 4 (2018): 707–14. http://dx.doi.org/10.13031/aea.12813.

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Picher irrigation is a traditional technique used to supply water to plants under drought conditions in arid regions. Laboratory experiments were conducted to evaluate water seepage rates from ceramic pots/pitchers, made from baked clay-sand local materials, under various environmental and hydraulic conditions. Seven ceramic pots (simulating ceramic emitters) with various dimensions were used in the experiments. Handmade ceramic pots of about 1 L in volume and 26 cm tall were used in the experiment. The hydraulic conductivities of the pots were measured using falling head method and the values

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Wong, D. K. H., S. L. Barbour, and D. G. Fredlund. "Modelling of flow through potash tailings piles." Canadian Geotechnical Journal 25, no. 2 (1988): 292–306. http://dx.doi.org/10.1139/t88-032.

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Modelling the flow of brine through potash tailings requires that the saturated and unsaturated hydraulic properties of the tailings be established; in particular, the relationships of fluid content and permeability to matric suction are required. The in situ and laboratory testing techniques used for determining these properties are described and the results are presented.Numerical modelling techniques for the flow of brine through potash tailings are demonstrated by performing a computer simulation of an open-trench infiltration test conducted at the Lanigan Division Potash Mine in Saskatche

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Zhu, Bin, De-qiong Kong, Ren-peng Chen, Ling-gang Kong, and Yun-min Chen. "Installation and lateral loading tests of suction caissons in silt." Canadian Geotechnical Journal 48, no. 7 (2011): 1070–84. http://dx.doi.org/10.1139/t11-021.

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A number of potential offshore wind turbines in China will be constructed in sandy silt seabeds, and the mono-caisson foundation is an important choice for these offshore wind turbines. A program of large-scale model tests on suction installation and lateral loading of caisson foundations in saturated silt were carried out in a large soil tank at Zhejiang University. Test results of installation resistance during suction installation show that the seepage effect is limited in silt, and the suction required to penetrate the caisson can be well predicted based on the sleeve friction and cone res

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Lei, Ming. "Study and Analysis: Mechanism of Vacuum Preloading, Stress of Soil." Applied Mechanics and Materials 71-78 (July 2011): 3389–96. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3389.

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Several viewpoints of vacuum preloading mechanism were analyzed. Action process of vacuum preloading was compartmentalized three phases. They were seepage consolidation in shallow soil and “surcharge” effect in deep soil by vacuum suction, consolidation stabilization in the shallow soil and transformation of “surcharge” to “negative pressure” in deep soil, seepage consolidation in deep soil under “negative pressure” and to balance. Action mechanism root of vacuum preloading was not negative pressure difference solely, which was produced by seepage field. The root was “positive pressure” and “n

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Kim, Jae Hong. "Water Flow in Unsaturated Porous Media by Finite Element Analysis." Advanced Materials Research 1044-1045 (October 2014): 597–602. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.597.

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To simulate water flow in unsaturated porous media, analytical and numerical solutions of infiltration models have revealed the hydraulic and mechanical properties of partially saturated soil, such as the soil-water retention curve, shear strength, and permeability functions. Seepage, which is related to both the rainfall intensity and the saturated soil permeability, is a problem for partially saturated soils. In this study, a simple stage model in developed to represent vadose zone infiltration under a constant intensity into a homogeneous soil with an ideal suction profile; in this model, t

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Rao, Yunzhang, Xiaoming Zhang, Zhongquan Gao, Run Xiang, and Laiye Zhang. "Experimental Study on Pore Structure and Soil-Water Characteristic Curve of Ionic Rare Earth Ore under Seepage." Minerals 13, no. 8 (2023): 1035. http://dx.doi.org/10.3390/min13081035.

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The ionic rare earth (RE) ore body undergoes particle transport and pore structure change during the leaching process, resulting in "uneven percolation, preferential channel, leaching blind area," and other problems, leading to structural changes in the ore body, low leaching efficiency, and waste of resources. The unsaturated infiltration process is also the key stage that causes these problems. The initial pore structure evolution of the ore body plays a decisive role in the permeability coefficient of the ore body, and the direct influencing factor of the permeability coefficient is the dis

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Ahmed, Asif, Md Jobair Bin Alam, Md Azijul Islam, and MD Sahadat Hossain. "Comparison of numerical modeling results from laboratory and field obtained unsaturated flow parameters." MATEC Web of Conferences 337 (2021): 02008. http://dx.doi.org/10.1051/matecconf/202133702008.

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Moisture and suction variation beneath pavement contribute significantly to the volumetric deformation of expansive subgrade in response to climatic loading. In order to quantify the damage due to climatic loading, estimation of moisture, and suction variation in pavement subgrade is of paramount importance. The objective of the current study is to investigate the moisture and suction variation in response to precipitation events with the aid of numerical modeling in the unsaturated pavement subgrade. In unsaturated soils where the voids are filled with both water and air, the SWCC describes t

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Guo, Zhen, Dong-sheng Jeng, Wei Guo, and Rui He. "Simplified approximation for seepage effect on penetration resistance of suction caissons in sand." Ships and Offshore Structures 12, no. 7 (2016): 980–90. http://dx.doi.org/10.1080/17445302.2016.1200450.

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Xiong, Bao Lin, Jing Song Tang, and Chun Jiao Lu. "Unsaturated Seepage and Fluid-Solid Coupling Analysis of Rainfall Infiltration of Slope." Advanced Materials Research 255-260 (May 2011): 3488–92. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3488.

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Rainfall is one of the main factors that influence the stability of slope. Rainfall infiltration will cause soil saturation changing and further influence pore water pressure and medium permeability coefficient. Based on porous media saturation-unsaturated flow theory, the slope transient seepage field is simulated under the conditions of rainfall infiltration. It is shown that change of pore water pressure in slope soil lag behind relative changes in rainfall conditions. As the rainfall infiltrate, unsaturated zone in top half of slope become diminution, the soil suction and shear strength re

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