Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity
Slope failure is a common phenomenon all over the world on both man-made and natural slopes. Prolonged rainfall is one of the climatic factors which is largely responsible for slope failure. During heavy and prolonged rainfall, a part of the rainwater infiltrates through the soil and seeps into the...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
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| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_24003.pdf |
| _version_ | 1797835418445545472 |
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| author | Gupta Alinda Islam Md Azijul Alam Md Jobair Bin |
| author_facet | Gupta Alinda Islam Md Azijul Alam Md Jobair Bin |
| author_sort | Gupta Alinda |
| collection | DOAJ |
| description | Slope failure is a common phenomenon all over the world on both man-made and natural slopes. Prolonged rainfall is one of the climatic factors which is largely responsible for slope failure. During heavy and prolonged rainfall, a part of the rainwater infiltrates through the soil and seeps into the slope. The infiltrated water lowers the matric suction and increases the porewater pressure. Eventually, the generated porewater pressure decreases the strength of the soil which results in slope failures. To evaluate the effect of rainwater seepage on slope stability, it is necessary to investigate the hydraulic conductivity of the slope soil. The objective of this study is to evaluate the effect of hydraulic conductivity on slope failure mechanisms. A finite element analysis of slope stability was conducted using Geo-Studio software. A numerical model was developed and calibrated with field monitoring data. The field monitoring data included the observation of hydraulic conductivity using a Guelph Permeameter. Afterward, the temporal variation of rainfall and hydraulic conductivity was incorporated into the SEEP/W program and the consequent changes in slope stability were evaluated in SLOPE/W. From the numerical analysis, with the identical strength parameters of the soil, different factors of safety were observed when the slope sections retain different hydraulic properties. Based on the numerical analysis, it was observed that hydraulic conductivity greater than 4×10-6 cm/s leads to slope failure. Periodic monitoring of hydraulic conductivity in the field may provide deep insight into rainfall-induced slope failures. |
| first_indexed | 2024-04-09T14:52:33Z |
| format | Article |
| id | doaj.art-e45876b7598d493b86dd549b5501ce80 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-09T14:52:33Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-e45876b7598d493b86dd549b5501ce802023-05-02T09:28:10ZengEDP SciencesE3S Web of Conferences2267-12422023-01-013822400310.1051/e3sconf/202338224003e3sconf_unsat2023_24003Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic ConductivityGupta Alinda0Islam Md Azijul1Alam Md Jobair Bin2Graduate Research Assistant, Department of Civil Engineering, The University of Texas at ArlingtonAssistant Professor of Instruction, Department of Civil Engineering, The University of Texas at ArlingtonAssistant Professor, Department of Civil Engineering, Prairie View A&M UniversitySlope failure is a common phenomenon all over the world on both man-made and natural slopes. Prolonged rainfall is one of the climatic factors which is largely responsible for slope failure. During heavy and prolonged rainfall, a part of the rainwater infiltrates through the soil and seeps into the slope. The infiltrated water lowers the matric suction and increases the porewater pressure. Eventually, the generated porewater pressure decreases the strength of the soil which results in slope failures. To evaluate the effect of rainwater seepage on slope stability, it is necessary to investigate the hydraulic conductivity of the slope soil. The objective of this study is to evaluate the effect of hydraulic conductivity on slope failure mechanisms. A finite element analysis of slope stability was conducted using Geo-Studio software. A numerical model was developed and calibrated with field monitoring data. The field monitoring data included the observation of hydraulic conductivity using a Guelph Permeameter. Afterward, the temporal variation of rainfall and hydraulic conductivity was incorporated into the SEEP/W program and the consequent changes in slope stability were evaluated in SLOPE/W. From the numerical analysis, with the identical strength parameters of the soil, different factors of safety were observed when the slope sections retain different hydraulic properties. Based on the numerical analysis, it was observed that hydraulic conductivity greater than 4×10-6 cm/s leads to slope failure. Periodic monitoring of hydraulic conductivity in the field may provide deep insight into rainfall-induced slope failures.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_24003.pdfslope stabilityhydraulic conductivityguelph permeameterunsaturated soil |
| spellingShingle | Gupta Alinda Islam Md Azijul Alam Md Jobair Bin Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity E3S Web of Conferences slope stability hydraulic conductivity guelph permeameter unsaturated soil |
| title | Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity |
| title_full | Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity |
| title_fullStr | Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity |
| title_full_unstemmed | Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity |
| title_short | Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity |
| title_sort | numerical evaluation of slope stability based on temporal variation of hydraulic conductivity |
| topic | slope stability hydraulic conductivity guelph permeameter unsaturated soil |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_24003.pdf |
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