Journal articles: 'Geotechnical investigations'

1

Threadgold, Leonard. "Undertaking geotechnical investigations." Structural Survey 3, no. 3 (March 1985): 225–31. http://dx.doi.org/10.1108/eb006212.

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Temple, Merdith W. B., and George Stukhart. "Cost Effectiveness of Geotechnical Investigations." Journal of Management in Engineering 3, no. 1 (April 1987): 8–19. http://dx.doi.org/10.1061/(asce)9742-597x(1987)3:1(8).

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3

Koutsoftas, Demetrious C., Roger Foott, and Leo D. Handfelt. "Geotechnical Investigations Offshore Hong Kong." Journal of Geotechnical Engineering 113, no. 2 (February 1987): 87–105. http://dx.doi.org/10.1061/(asce)0733-9410(1987)113:2(87).

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Feng, Zhengyi, Tian-yu Wang, Der-guey Lin, and Jin-ching Chern. "Improving Effectiveness and Reliability in Geotechnical Investigations with a Personal Digital Assistant." Transportation Research Record: Journal of the Transportation Research Board 1936, no. 1 (January 2005): 161–70. http://dx.doi.org/10.1177/0361198105193600119.

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Personal digital assistant (PDA) applications to improve the effectiveness and reliability in geotechnical investigations have been developed. Because of PDA's legerity and mobility, it is an excellent choice for use with a simple global position system (GPS) in geotechnical field work, such as site reconnaissance, subsurface investigation, surface investigation, safety evaluation, testing, and instrumentation. Using PDAs in geotechnical engineering can save traditional field paper forms, avoid repeated record input, reduce the risk of wrong data interpretation, and shorten the time and space “barrier” between the office and the field. After the field data are collected on the PDA, they can be transferred to a desktop personal computer (PC) for further processing and reporting. The desktop PC is designated to handle more complicated analyses and visual presentations. Specialized functions of applications to operate PDA and GPS, as well as for the desktop PC, were developed according to the characteristics of the geotechnical tasks. The concept and framework were applied for three geotechnical assistant systems: drilling investigation assistant system, surface geologic investigation assistant system, and slope safety evaluation assistant system. In addition, an example illustrates the application of GPS, PDA, and geographic information systems for debris flow reconnaissance. Using PDAs improves the effectiveness and reliability of geotechnical investigations and is promising for further development.

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Sowmya, S., P. S. Meenu, R. Asha Latha, and Devendra Narain Singh. "Laboratory Investigations on the Effects of Bacteria on Fine-Grained Soils." Advanced Engineering Forum 21 (March 2017): 352–57. http://dx.doi.org/10.4028/www.scientific.net/aef.21.352.

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Over the years, the field of geotechnical engineering focused on physical, chemical and mechanical aspects of the geomaterials. However, recent developments in environmental geotechnics have highlighted the impact of biological processes on geo-materials and their performance. Also, the present day geotechnical problems favour biological interventions to develop eco-friendly and sustainable technology. In view of this, the present study is a preliminary investigation on the impact of microbial loading on fine-grained soils. In addition, a protocol has been developed to establish ‘bio-geo interface’ between bacteria and the geo-material. However, long term studies are demanded in this direction for in-depth understanding of the mechanism for development of prospective application.

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Batog, Andrzej, and Maciej Hawrysz. "Reliability of the geotechnical data for the modernization and repair of railways." Transportation Overview - Przeglad Komunikacyjny 2016, no. 10 (October 1, 2016): 39–46. http://dx.doi.org/10.35117/a_eng_16_10_04.

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The article concerns the rules and guidelines used for geotechnical design, subsoil investigation procedures and geotechnical investigation methods of railway lines. The discussion of the soil investigation methods, which provide reliable geotechnical data for the modernization and repair of railway lines, is presented. The article describes a comprehensive example of errors made during the programming and performing of soil investigations in the modernized railway line. The impact of soil investigation errors on the slope stability of the railway embankment is discussed.

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Gay, Derek A., Frank D. Morgan, Yervant Vichabian, John A. Sogade, Philip Reppert, and A. E. Wharton. "Investigations of andesitic volcanic debris terrains: Part 2 — Geotechnical." GEOPHYSICS 71, no. 1 (January 2006): B9—B15. http://dx.doi.org/10.1190/1.2159046.

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Here, results of geotechnical investigations for the proposed Dominica international airport are presented. The main geotechnical investigative method is comprised of boreholes to 30 m depth with standard penetrating testing (SPT) and undisturbed Shelby tube and disturbed split-spoon soil sampling. The geotechnical investigation confirms the findings of a companion geophysical investigation, which concludes that bedrock is not likely to be encountered within the proposed depths of excavation for the airport. Geophysical and geotechnical data correlations are developed. Seismic velocity and the number N of blow counts with SPT (SPT N) appear to be well correlated by a linear model. A model relationship between SPT and seismic dynamic elastic modulus is developed using seismic velocity. SPT N is better correlated with the dynamic elastic modulus than with seismic velocity. The study shows that the seismic velocity and the derived dynamic elastic moduli can accurately predict soil strength as measured by SPT blow counts.

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Reiffsteck, Philippe, Jean Benoît, Céline Bourdeau, and Gilles Desanneaux. "Enhancing Geotechnical Investigations Using Drilling Parameters." Journal of Geotechnical and Geoenvironmental Engineering 144, no. 3 (March 2018): 04018006. http://dx.doi.org/10.1061/(asce)gt.1943-5606.0001836.

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Das, Subhajyoti. "Groundwater: Geotechnical investigations and quality assessment." Journal of the Geological Society of India 89, no. 2 (February 2017): 216. http://dx.doi.org/10.1007/s12594-017-0586-y.

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10

Popescu, M. E. "In-situ testing for geotechnical investigations." Earth-Science Reviews 22, no. 2 (September 1985): 146. http://dx.doi.org/10.1016/0012-8252(85)90008-x.

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11

Arshid, Muhammad Usman, and M. A. Kamal. "Regional Geotechnical Mapping Employing Kriging on Electronic Geodatabase." Applied Sciences 10, no. 21 (October 29, 2020): 7625. http://dx.doi.org/10.3390/app10217625.

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A regional geotechnical map was developed by employing kriging using spatial and s geostatistical analysis tools. Many studies have been carried out in the field of topography, digital elevation modeling, agriculture, geological, crop, and precipitation mapping. However, no significant contribution to the development of geotechnical mapping has been made. For the appraisal of a geotechnical map, extensive field explorations were carried out throughout the geotechnically diversified plateau spread over an area of approximately 23,000 km2. In total, 450 soil samples were collected from 75 data stations to determine requisite index properties and soil classification for the subsequent allowable bearing capacity evaluation. The formatted test results, along with associated geospatial information, were uploaded to ArcMap, which created an initial input electronic database. The kriging technique of geostatistical analysis was determined to be more feasible for generating a geotechnical map. The developed map represents the distribution of soil in the region as per the engineering classification system, allowable bearing capacity, and American Association of State Highway and Transportation Officials (AASHTO) subgrade rating for 1.5-, 3.0-, and 4.5-m depths. The accuracy of the maps generated using kriging interpolation technique under spatial analyst tools was verified by comparing the values in the generated surface with the actual values measured at randomly selected validation points. The database was primarily created for the appraisal of geotechnical maps and can also be used for preliminary geotechnical investigations, which saves the cost of soil investigations. In addition, this approach allows establishing useful correlations among the geotechnical properties of soil.

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12

Gadeikis, Saulius, Kastytis Dundulis, Sonata Gadeikytė, Donatas Urbaitis, and Domas Gribulis. "Geotechnical properties of compacted clays as buffer and backfill." Baltica 27, no. 1 (September 6, 2014): 55–62. http://dx.doi.org/10.5200/baltica.2014.27.06.

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The purpose of the investigation is to assess local clay soils of different composition, physical state and mechanical properties as a base and construction material for establishment of landfills for radioactive waste. The investigations have been carried out for three clay soil types of different age and origin in order to assess the potential of this clay to be used for the establishment of engineering barriers, as well as the base and slopes of landfills. The investigations have been performed by laboratory and field methods for both the natural as well as the disturbed and compacted soils. In order to assess the soil to be used for fill-ins (aggregate), field investigations have been performed at a special test site. Changes in geotechnical features of the soils were observed at the test site in autumn and spring. Seasonal investigations enabled to assess the compacted clay soils according to changes of their features over time.

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13

Rezaei, Sadegh, Issa Shooshpasha, and Hamed Rezaei. "Empirical Correlation between Geotechnical and Geophysical Parameters in a Landslide Zone (Case Study: Nargeschal Landslide)." Earth Sciences Research Journal 22, no. 3 (July 1, 2018): 195–204. http://dx.doi.org/10.15446/esrj.v22n3.69491.

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Today, geotechnical and geophysical techniques are used for landslide evaluation. Geotechnical methods provide accurate data, but are time consuming and costly. Geophysical techniques, however, are fast and inexpensive, yet their accuracy is lower than that of the geotechnical methods. Therefore, simultaneous use of geotechnical and geophysical methods provides a suitable solution for landslide evaluation. Availability of geotechnical and geophysical data makes it possible to investigate correlation between different parameters. Correlating geotechnical and geophysical parameters ends up lowering field investigation costs and enhancing subsurface survey speed in a landslide zone. In the present study, in order to evaluate Nargeschal landslide in Iran, ambient noise measurement, ERT survey, and geotechnical investigations were used. Once finished with data processing, the data obtained from geotechnical and geophysical investigations were correlated. These included SPT-N – electrical resistivity, soil moisture content – electrical resistivity, and SPT-N – shear wave velocity correlations. The correlations were examined using two methods, namely Spearman’s coefficient test and least square regression analysis. The results obtained from the two methods were in good agreement with one another. The correlations obtained in this study were of moderate to very strong strength and fell in the range of the results of previous studies. Investigation of the results indicated significant influences of ground water on electrical resistivity and soil stiffness on shear wave velocity. Results of this study can be used for soil classification and determination of mechanical and seismic characteristics of soil across various areas.

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14

Campbell, K. J., G. W. Quiros, C. Machado, and J. R. de Castro. "Integrated geophysical and geotechnical deepwater site investigations." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 27, no. 2 (April 1990): A90. http://dx.doi.org/10.1016/0148-9062(90)95066-a.

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15

Yang, Rui, Jinsong Huang, D. V. Griffiths, Jingjing Meng, and Gordon A. Fenton. "Optimal geotechnical site investigations for slope design." Computers and Geotechnics 114 (October 2019): 103111. http://dx.doi.org/10.1016/j.compgeo.2019.103111.

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16

Lutenegger, Alan J. "Practical Aspects of Routine Geotechnical Site Investigations." GEOSTRATA Magazine 25, no. 1 (January 2021): 54–59. http://dx.doi.org/10.1061/geosek.0000005.

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17

Li, Gang, Jin-Li Zhang, and Qing Yang. "Geotechnical Investigations at the Dalian Offshore Airport, China." Marine Georesources & Geotechnology 34, no. 8 (September 6, 2015): 747–58. http://dx.doi.org/10.1080/1064119x.2015.1087438.

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18

Pelletier, J. H., E. H. Doyle, and R. N. Dutt. "Deepwater Geotechnical Investigations in the Gulf of Mexico." Underwater Technology 22, no. 2 (January 1, 1997): 63–74. http://dx.doi.org/10.3723/175605497783338112.

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19

Bennett, R., J. Burns, F. Nastav, J. Lipkin, and C. Percival. "Deep-ocean piezometer probe technology for geotechnical investigations." IEEE Journal of Oceanic Engineering 10, no. 1 (January 1985): 17–22. http://dx.doi.org/10.1109/joe.1985.1137409.

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20

Clifton, A. W. "Premining geotechnical investigations for a Saskatchewan coal mine." International Journal of Surface Mining, Reclamation and Environment 1, no. 1 (January 1987): 27–34. http://dx.doi.org/10.1080/09208118708944099.

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21

Mutschler, Thomas, Theodoros Triantafyllidis, and Karl Balthasar. "Geotechnical investigations of cap rocks above CO2 -resevoirs." Energy Procedia 1, no. 1 (February 2009): 3375–82. http://dx.doi.org/10.1016/j.egypro.2009.02.126.

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22

Özgüler, E., A. Ertunc, and O. Taner. "Geotechnical investigations of Işikli Tunnel alternative alignments, Turkey." Bulletin of the International Association of Engineering Geology 53, no. 1 (April 1996): 73–81. http://dx.doi.org/10.1007/bf02594943.

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23

Din, Moeen-ul, Jamal Ali, Abdul Qudoos Khan, and Farjad Sami. "Geotechnical Characteristics of Subsoil for Different Sectors of Islamabad." NUST Journal of Engineering Sciences 11, no. 1 (March 10, 2019): 33–40. http://dx.doi.org/10.24949/njes.v11i1.179.

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Geotechnical site investigations are essential in determining subsoil stratigraphy and soil strength and is considered mandatory for design of foundations. This study presents the generalized profiles for subsurface stratigraphy and insitu soil strength (average SPT N values) for different sectors of Islamabad on the basis of wide-ranging experimental work carried out by several agencies in fieldand laboratory testing carried out at the number of locations in the study area. Data from 208 geotechnical site investigations of Islamabad have been collected and subsurface profiling for those sectors is carried out that had more than four data points. The experimental data of the study area has shown potential for development of profile map for 11 different sectors of Islamabad using data of 144 geotechnical site investigations. Generalized soil profile and average SPT N values for each sector have been generated to a depth of 7m which is considered sufficient for lightly loaded structures with shallow foundations. Average SPT N value profile coupled with soil stratigraphy for each zone is established that can used to determine shear strength parameters and bearing capacity of soil using SPT based empirical correlations. The generalized soil profiles will be helpful during feasibility study and planning geotechnical site investigations for mega projects and can also be used to determine engineering properties of subsoil for small scale projects.

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24

Mitew-Czajewska, Monika. "Geotechnical investigation and static analysis of deep excavation walls – a case study of metro station construction in Warsaw." Annals of Warsaw University of Life Sciences, Land Reclamation 47, no. 2 (June 1, 2015): 163–71. http://dx.doi.org/10.1515/sggw-2015-0022.

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Abstract The paper presents detailed analysis of the case – a construction of deep excavation of metro station in Warsaw. Basing on this example, the great impact of the accuracy of the geotechnical investigation on the static analysis of diaphragm walls is discussed. Geotechnical studies for the construction of the central section of the second metro line were carried out in stages. Basic geotechnical soil investigation took place in the first stage of investment process, e.g. building permit and tender design stages in 2003–2004, 2007 and 2010. In subsequent years, complementary soil investigations have been performed by the contractor, and the results occurred to differ significantly. In the first part of the paper detailed description of the case is introduced. The geological conditions in the area of the station and the interpretation of the results of the three successive stages of geotechnical investigation are presented. As a result, two locations were selected with a great diversity of the soil profile depending on the stage of investigation. For each location, detailed, multiple static analysis of diaphragm walls were performed, taking into account changes in the soil profile. In the paper, one selected location is described in detail. The discussion of calculation results for this location in relation to the changing geotechnical data is presented and final conclusions are provided.

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Gahir, J. S., A. R. Clark, P. L. Martin, and A. F. Howland. "Planning and geotechnical considerations for redevelopment of derelict industrial land in London docklands." Geological Society, London, Engineering Geology Special Publications 4, no. 1 (1987): 429–38. http://dx.doi.org/10.1144/gsl.eng.1987.004.01.52.

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AbstractThe redevelopment of former docklands, with docks frequently backfilled by end tipping through water, requires careful planning and a proper understanding of the geotechnical properties of the materials involved. An overall scheme for development of part of the former Surrey Commercial Docks Southwark, disused since 1960s, was formulated by London Docklands Development Corporation to provide a new environment encompassing housing, schooling, a shopping centre, social and recreation facilities and light industrial units.This paper presents a review of the development strategy and planning aspects of the development of Surrey Quays with particular reference to the assessment of the former wharf areas and the quality of the dockfill. Planning considerations, along with the role of geotechnics within the infrastructure development plan, are presented. The results of geotechnical investigations which included an extensive phase of field and laboratory testing, led to a ground improvement programme consisting of surcharge loading and vibro-replacement.

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26

Yang, Rui, Jinsong Huang, D. V. Griffiths, Jinhui Li, and Daichao Sheng. "Importance of soil property sampling location in slope stability assessment." Canadian Geotechnical Journal 56, no. 3 (March 2019): 335–46. http://dx.doi.org/10.1139/cgj-2018-0060.

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Site investigations provide characterization of soil properties, but inevitable uncertainty remains at locations that have not been examined. Only a limited scope of site investigation can be conducted due to budget and time constraints, hence there are always risks associated with design based on limited investigation information. An efficient geotechnical site investigation should involve choosing the optimal number and location of borehole sites to gain adequate information for a given cost. Using a slope as an example, this paper proposes a framework to find the best sampling location that gives the most information while minimizing the probability of making the wrong decisions. The results suggest that the slope crest appears to be the optimal location to conduct geotechnical site exploration for slope stability assessment.

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27

HOPE, V. S. "THE APPLICATION OF SEISMIC VELOCITY TOMOGRAPHY IN GEOTECHNICAL INVESTIGATIONS." Proceedings of the Institution of Civil Engineers - Geotechnical Engineering 113, no. 4 (October 1995): 215–25. http://dx.doi.org/10.1680/igeng.1995.28017.

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28

Chik, Z., T. Islam, M. M. Mustafa, H. Sanusi, S. A. Rosyidi, and M. R. Taha. "Surface Wave Analysis Using Morlet Wavelet in Geotechnical Investigations." Journal of Applied Sciences 9, no. 19 (September 15, 2009): 3491–501. http://dx.doi.org/10.3923/jas.2009.3491.3501.

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29

Ball, T. G., A. J. Beswick, and J. A. Scarrow. "Geotechnical investigations for a deep radioactive waste repository: drilling." Geological Society, London, Engineering Geology Special Publications 11, no. 1 (1996): 193–200. http://dx.doi.org/10.1144/gsl.eng.1996.011.01.26.

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30

Bortkevich, S. V. "Some problems of improving geotechnical investigations for hydrotechnical construction." Hydrotechnical Construction 21, no. 2 (February 1987): 84–90. http://dx.doi.org/10.1007/bf01424910.

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31

Sudha, Kumari, M. Israil, S. Mittal, and J. Rai. "Soil characterization using electrical resistivity tomography and geotechnical investigations." Journal of Applied Geophysics 67, no. 1 (January 2009): 74–79. http://dx.doi.org/10.1016/j.jappgeo.2008.09.012.

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32

Leetsaar, L., L. Korkiala-Tanttu, V. Jaaniso, J. Kurnitski, and J. Idnurm. "Extent of geotechnical site investigations for buildings in Estonia." IOP Conference Series: Earth and Environmental Science 727, no. 1 (April 1, 2021): 012001. http://dx.doi.org/10.1088/1755-1315/727/1/012001.

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33

Cripps, J. C., P. B. Attewell, and J. P. Woodman. "Economic design of ground investigations for planning." Geological Society, London, Engineering Geology Special Publications 4, no. 1 (1987): 61–68. http://dx.doi.org/10.1144/gsl.eng.1987.004.01.05.

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AbtractPlanning the development of an urban area is a complex operation in which many disparate objectives and constraints must be reconciled. An attempt is usually made to achieve particular aims at minimum cost. If geological and geotechnical factors are considered in isolation, then a particular structure will cost least to build in locations offering the most favourable ground conditions. Unfortunately, seldom is suitable geological and geotechnical information available at this early stage of development.The paper outlines a mechanism whereby reduction in the uncertainty about the ground conditions, achieved by carrying out site investigations work, may be related, through the application of simple probability theory, to a consequent expected loss caused by construction or maintenance. Thus in planning decisions a financial optimum can be identified in which the cost implications of ground investigations, construction and maintenance can be taken into account.

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34

Carter, P. G., R. M. Pirie, and M. Sneddon. "Marine Site Investigations and BS 5930." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 163–66. http://dx.doi.org/10.1144/gsl.1986.002.01.33.

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AbstractMarine site investigations are reviewed briefly, in terms of suitable drilling platforms and craft for various conditions, requirements for permissions and service locations, marine ground investigation methods and marine survey methods including geophysical profiling.The wide range of marine site investigation methods is illustrated and the appreciable differences from land site investigation methods are noted. It is suggested that BS 5930 does not give sufficient guidance on marine site investigations and that this situation should be rectified.

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Boboc, Vasile, Ancuţa Rotaru, Andrei Boboc, and Gupinath Bhandari. "Site Soil Investigations for Road Rehabilitation." Advanced Engineering Forum 21 (March 2017): 372–79. http://dx.doi.org/10.4028/www.scientific.net/aef.21.372.

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The soil investigation performed on site identifies the physical and mechanical properties of the soil under the present road structure as well as the nature and thickness of the road structure to rehabilitate it when the road surface condition becomes poor or defective due to ageing, weathering and road traffic action. The rehabilitation processes re-assess the soil parameters to restore the pavement surface to the required level of service based on the recommendations of the field stratification as well as of the geotechnical characteristics of the studied emplacement. The paper presents the soil investigations on site along DN29 Suceava-Botoşani-Săveni-Manoleasa, Km 18+075 section of national road in Romania to get the information on subsurface conditions. The national road DN29 Suceava-Botoşani-Săveni-Manoleasa is covering the north-eastern part of Romania, in Moldavia region. Since its asphalt works in the '70s and '80s, nothing but partial sections of asphalt works has been carried out having never undergone major repairs. Due to external factors such as rain, snow, and traffic, the minor works that had been made make it usable for a short time, the results of soil investigation clearly attesting the rehabilitation priority. Some geotechnical characteristics of the national road DN29 Suceava-Botoşani-Săveni-Manoleasa, Km 18+075 section in Romania appear in comparison with those identified on site on the road DN29A Suceava-Dorohoi-Darabani, Km 50+075, in Romania, under a road structure that needed rehabilitation works as well.

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Long, Michael, Andy Trafford, Tomás McGrath, and Peter O'Connor. "Multichannel analysis of surface waves (MASW) for offshore geotechnical investigations." Engineering Geology 272 (July 2020): 105649. http://dx.doi.org/10.1016/j.enggeo.2020.105649.

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Chung, S. G., P. H. Giao, G. J. Kim, and S. Leroueil. "Geotechnical properties of Pusan clays." Canadian Geotechnical Journal 39, no. 5 (October 1, 2002): 1050–60. http://dx.doi.org/10.1139/t02-055.

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The Nakdong River plain is one of the few areas in Korea where soft clays have been deposited. Although many site investigations related to large-scale reclamation works have been carried out over the past 10 years, soil profiles still need to be better characterized. The Pusan clays at this location constitute an interesting topic for researchers both in and outside Korea due to their geological complexity, unusually great thickness, very low overconsolidation (OCR) values, large consolidation settlement, and the effects of artesian pressure. This paper represents the first comprehensive review of Pusan clays and collates extensive existing and new geotechnical data. These data are then analyzed within the frameworks of both classical and new developments in soft clay engineering to address the problems mentioned above.Key words: Pusan, soft clay, intrinsic compression, geotechnical properties.

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Lech, Mariusz, Marek Bajda, and Katarzyna Markowska-Lech. "The use of resistivity and seismic cone penetration tests for site characterization." Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation 40, no. 1 (January 1, 2008): 87–96. http://dx.doi.org/10.2478/v10060-008-0040-3.

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The use of resistivity and seismic cone penetration tests for site characterization The use of resistivity and seismic cone penetration tests for site characterization. Recent application of cone penetration tests to geotechnical and environmental site characterization has generated a wide collection of new sensors. This paper presents methods of interpreting geotechnical in situ investigations carried out by electrical resistivity (RCPT) and seismic (SCPT) cones. It contains some fundamental equations and the description of in situ electrical resistivity and shear wave velocity measurements and presents the results of SCPT and RCPT investigations at the experimental Stegny site in Warsaw. The aim of the paper is to present the approach to determination of shear wave velocity and porosity of clayey soils. According to the test results obtained, it can be concluded that both applied techniques are very useful to estimate the distribution of clay deposits and some of their geotechnical parameters.

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39

Sharifi-Mood, Mahyar, Daniel T. Gillins, Michael J. Olsen, Kevin W. Franke, and Steven F. Bartlett. "A Geotechnical Database for Utah (GeoDU) enabling quantification of geotechnical properties of surficial geologic units for geohazard assessments." Earthquake Spectra 36, no. 1 (January 13, 2020): 422–51. http://dx.doi.org/10.1177/8755293019878197.

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Geotechnical borehole information is often used for liquefaction hazard mapping, but can be highly variable in terms of quantity and quality. In addition, geotechnical borehole logs are often provided as images in reports rather than delivered in a structured, queryable database, which makes the logs and supplementary information difficult to organize particularly across a large geographic area. In contrast, surficial geologic mapping is generally available and often accessible in geographic information systems (GIS) format. This article’s objective is to describe the compilation of a geotechnical database for regional mapping purposes and to demonstrate the value of documenting geotechnical data into a consistent data format. Specifically, this article describes the development of three geotechnical borehole databases compiled in Utah, which has been coined the Geotechnical Database for Utah (GeoDU). The database is used to quantify geotechnical properties for subsequent liquefaction evaluations of surficial geologic units comprising similar depositional environment and age. The resulting GeoDU is an important resource for future efforts with many applications including community data sharing and planning for preliminary geotechnical site investigations.

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Nguyen, Manh Duc, Nguyen Van Thang, Akihiko Wakai, Go Sato, Jessada Karnjana, Hoang Viet Hung, Lanh Si Ho, Indra Prakash, Hoc Tran Quang, and Binh Thai Pham. "Identification, Monitoring, and Assessment of an Active Landslide in Tavan-Hauthao, Sapa, Laocai, Vietnam – A Multidisciplinary Approach." Journal of Disaster Research 16, no. 4 (June 1, 2021): 501–11. http://dx.doi.org/10.20965/jdr.2021.p0501.

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The active landslide located in the Tavan-Hauthao, Sapa district, Laocai province, Vietnam was investigated using geophysical methods (2D Electrical Resistivity and Tomography), geotechnical investigations, and a ground survey to assess the geologic condition of the sliding block and surrounding ground. Landslide displacement was measured using 15 surface monitoring points. Numerical modeling was done to assess the behavior of an active landslide. This multi-disciplinary approach helped in interpreting landslide stratigraphy, geotechnical characteristics of the sliding groundmass, depth, and nature of the sliding plane. The surface area of the slide is approximately 1200 m2. Studying this active landslide is important as it affects the road No. 152, which is an important road connecting the Sapa Ancient Rock Field. This study involved surface topographical survey, surface and sub-surface geological, and geotechnical investigations including Standard Penetration Test and Electrical Resistivity Tomography. Geologic and geotechnical data were used to characterize an active landslide block, which is composed of different soil layers underlaid by granitic rock. The surface electrical-resistivity measurements across the Sapa landslide resulted in inverted-resistivity sections with distinct resistivity contrasts that correlated well with the geology and geo-hydrology observed in boreholes.

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Dobecki, T. L., and P. R. Romig. "Geotechnical and groundwater geophysics." GEOPHYSICS 50, no. 12 (December 1985): 2621–36. http://dx.doi.org/10.1190/1.1441887.

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Because of a change in emphasis from power plant siting to projects principally involving process and facility monitoring and certification of existing structures (dams, pipelines, etc.), geotechnical and groundwater geophysics is in quite a healthy state after some lean years following the demise of nuclear energy construction projects. The orders‐of‐magnitude jump in the computational capability of geophysicists working in these fields has overshadowed advances in instrumentation (e.g., digital enhancement seismographs), field methods (e.g., cross‐borehole EM), and interpretive procedures. The advent of powerful, affordable microcomputers has enabled expansion into applications demanding finer resolution and quicker turnaround of results. As a result, shallow seismic reflection, seismic and electromagnetic geotomography, and the complementary use of surface and borehole electrical resistivity and seismic data will soon be common if not dominant methods in geotechnical and groundwater investigations. Future trends point to increased emphasis on environmental and economic issues (e.g., toxic wastes or the stability of underground petroleum storage facilities), cross‐fertilization with petroleum reservoir engineering (process monitoring and detailed reservoir description), and greater involvement of computers in the planning, data acquisition, and interpretive phases of our projects. As computers take over more of the data collection‐processing‐interpretation sequence, one of the greatest challenges facing us will be to define the proper role of humans and to use the new technology wisely.

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Nozaki, Tamotsu, Katsumi Ookubo, and Toshio Yamamoto. "Recumbent fold and deformed cut slope in the landslide-prone region of the Niigata Prefecture, Central Japan." Journal of Nepal Geological Society 22 (December 1, 2000): 510–24. http://dx.doi.org/10.3126/jngs.v22i0.32426.

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The proposed Joushin-etsu Expressway passes along the western margin of the Takada Plain in the Niigata Prefecture. Japan. The Expressway runs through the eastern limb of the Nanbayama Anticline, which is composed mainly of Miocene sedimentary rocks. This part of the Niigata Prefecture is one of the well-known landslide-prone regions of Japan. Numerous prehistoric rockslides were identified during the preliminary investigations. Consequently, many additional studies were conducted and monitoring networks were established during the construction of tunnels and open excavations. In order to obtain representative geotechnical data for one of the excavations, detailed geological mapping, geotechnical investigation, and monitoring of a cut slope deformation were conducted. The investigations revealed unusual geological features: a thick crush zone, interbedding of sandstone and mudstone, and a recumbent fold constituting the crest of an isolated hill. The cut slopes in the crush zone started to deform during the excavation, and continued even after the completion of the excavation. We believe that the crush zone was developed tectonically, and the recumbent fold was formed as a result of the stress release induced by rapid erosion and gravity.

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Zhussupbekov, Askar, and Abdulla Omarov. "Modern Advances in the Field Geotechnical Testing Investigations of Pile Foundations." Procedia Engineering 165 (2016): 88–95. http://dx.doi.org/10.1016/j.proeng.2016.11.739.

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Oung, O., A. Bezuijen, F. Weststrate, E. Haza, C. Favraud, J. Garnier, S. Spiessl, et al. "Investigations of a european network of geotechnical centrifuges on multiphase flow." International Journal of Physical Modelling in Geotechnics 5, no. 1 (March 2005): 01–14. http://dx.doi.org/10.1680/ijpmg.2005.050101.

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Martins, Flávia Burmeister, Pedro Miguel Vaz Ferreira, Juan Antonio Altamirano Flores, Luiz Antônio Bressani, and Adriano Virgílio Damiani Bica. "Interaction between geological and geotechnical investigations of a sandstone residual soil." Engineering Geology 78, no. 1-2 (April 2005): 1–9. http://dx.doi.org/10.1016/j.enggeo.2004.10.003.

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Head, J. M. "Planning and Design of Site Investigations." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 1–5. http://dx.doi.org/10.1144/gsl.eng.1986.002.01.01.

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AbstractGuidance on planning and design of site investigations is not explicitly included in the Code of Practice for Site Investigations (1981). Insufficient emphasis is given to developing a strategy and a programme of activities which is relevant to the proposed development and ground conditions.A more formal approach to the organisation of these preliminary stages is presented and an outline given for a planned programme of administration.Guidelines are given on how to develop an appropriate strategy including categorisation of investigation, preliminary design assessment and detailing site work. The need for records and refinement is highlighted.

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Illiyin, Odhi Attabik, and Fikri Faris. "GEOTECHNICAL INVESTIGATION AND NUMERICAL ANALYSIS OF ROCKFALL IN SOUTH COAST OF GUNUNG KIDUL REGENCY." Journal of the Civil Engineering Forum 3, no. 1 (August 29, 2017): 315. http://dx.doi.org/10.22146/jcef.26595.

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On 17th of June 2015, rockfall occurred on the South Coast at Gunung Kidul Regency taking a few casualties. The preliminary investigation results concluded that many cliffs on the South Coast are dangerous, and there is a potential that similar events might happen in the future. Therefore, geotechnical investigation in order to plan mitigation action is necessary. Field investigations, laboratory work, and numerical modeling were employed in this study, focusing on Sadranan beach where the incident happened. Rock slope stability analyses by means two-dimensional finite element in both static and seismic conditions were conducted. The investigation results show that both biological decay and wave erosion influence the rock slope instability. Moreover, the infilling material in rock joint has considerable effect on the stability of the slope. However, the results from numerical simulation suggested that potential failure was originating from the intact rock body instead of the plane of discontinuities. In the seismic condition, the slopes are more vulnerable and further mitigation action should be considered in the future.

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Obi L.E. and Uwanugo R.G. Uchejiora. "A geotechnical approach to gully erosion control and management at Inyishi, Ikeduru L.G.A., Imo State, Nigeria." World Journal of Advanced Engineering Technology and Sciences 1, no. 2 (December 30, 2020): 063–70. http://dx.doi.org/10.30574/wjaets.2020.1.2.0032.

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This research is aimed at appraising the root causes of gully erosion at Inyishi in Ikeduru Local Government Area of Imo State, Nigeria, and the possible geotechnical control and management techniques that could be applied in curbing the menace. In pursuance to these objectives, field and laboratory investigations were undertaken. The field works involved reconnaissance and chain surveys, and contouring of the gully catchments. It was observed that gullies were initiated in the research area by flow concentrations induced by environmental factors related to roads and aligned buildings constructed with inadequate drainage facilities upstream of the gully locations. Laboratory investigations carried out involved engineering analyses of soil samples collected at the gully sites and beds for the determination of the soils grain sizes, Atterberg limits, moisture content, specific gravity, permeability, shear strength and bulk density relations. A summary of the engineering properties of the soil revealed its poorly graded and sandy nature, its inadequate fine materials content, low liquid and plastic limits, which ranged between 35.80 to 42.20 % and 28.35 to 35.00 % respectively, as well as its low permeability index of 1 × 10-2cm/sec. These findings, coupled with the fact that the gully area was underlain with friable and cohesionless soil, with small time of concentration, which renders it easily disaggregated by runoff are pointers to the relative ease of water infiltration and seepage at the gully locations. The erosive power of the slope within the gully area was estimated by chain surveying of the entire catchment. The efficacy of natural local materials such as vetiver grass, wood shavings, palm kernel shells, coconut husk, bread fruit husk, dead plant mulch, etc. for the geotechnical works on gully erosion control and management was explored. General specifications on the geotechnics of managing the installed control works for their sustainable services were proffered.

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Hong, Bo, Bao Hui Li, and Yan Bing Lv. "Application and Study of Magnetotellurics in Hydropower Project." Applied Mechanics and Materials 687-691 (November 2014): 791–94. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.791.

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Based on results of the supplementary feasibility study geological and geotechnical investigation of some hydropower project about the active fault, which is partly buried by thick quaternary soil and partly exposed fault that triggered the earthquake ( M7.6 ) of Kashmir in 2005, Comprehensive methods such as geological mapping, drilling, borehole TV, acoustic wave test and testing on-site, are applied, it ascertains location, strike (orientation and dips), width of affected band, approximate depth, properties and integrity of the rocks within the active fault, developing trend and distribution range of the active fault. Interrelations of different methods and advantages or disadvantages are discussed and analyzed, at the same time, key points, difficulties and working procedures during the geological and geotechnical investigations are summarized, lot of data, results and figures are offered and analyzed,these methods and procedures can be mirrored and inferred in the future similar project.

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Chik, Zamri, and Taohidul Islam. "Performance of Multi-Layer Soil Electric Resistivity Model Comparing with Two-Layer Characterizations in Geotechnical Investigations." Advanced Materials Research 655-657 (January 2013): 1857–63. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1857.

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This paper shows the performance of multi-layer soil electric resistivity model comparing with two-layer characterizations in geotechnical investigations. In conventional model, there are inter-relationships between soil apparent electrical resistivity (ρ) and several soil physical or chemical properties. These empirical relationships show limitations to obtain specific soil characterizations of different layers with. Multi-layer true resistivity model is the improvement of conventional two-layer earth model including the criteria of four points probe method. Multi-layer soil resistivity profile shows more accuracy to obtain near surface soil characteristics including the types of soil and rocks, and to detect anomalous materials in soil profile. Alternatively, apparent resistivity in two-layer model can be used to obtain deeper profile of soil characteristics. In this multi-layer soil model, the soil resistivity and resistivity ratio corresponding to the depth in soil medium are considered for geotechnical investigations. Two-layer model includes soil apparent resistivity according to probe distances in depth corresponding resistivity profile. This paper is important for including criteria and performance of multi-layer soil resistivity model and conventional two-layer model for geotechnical characterizations.

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Journal articles on the topic 'Geotechnical investigations'

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