Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure
Soil slopes, located near rivers or the sea, often get damaged dramatically under seismic action due to the high groundwater level. To determine the failure mechanism, this study proposed an analytical method for a composite critical slip surface of a multi-layer slope considering the effects of the...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-12-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2021.799612/full |
| _version_ | 1819004717113540608 |
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| author | Shuai Huang Shufeng Zhai Yingjie Liu Chuanzheng Liu Katsuichiro Goda Ben Mou |
| author_facet | Shuai Huang Shufeng Zhai Yingjie Liu Chuanzheng Liu Katsuichiro Goda Ben Mou |
| author_sort | Shuai Huang |
| collection | DOAJ |
| description | Soil slopes, located near rivers or the sea, often get damaged dramatically under seismic action due to the high groundwater level. To determine the failure mechanism, this study proposed an analytical method for a composite critical slip surface of a multi-layer slope considering the effects of the excess pore water pressure using the Newmark’s method and variational principle. Based on this, a method for evaluating the effects of the excess pore water pressure on the permanent displacement of the slope under seismic action was established, and influence mechanisms of the excess pore water pressure on failure modes of the multi-layer bank slope at different groundwater levels were studied. The research results show that slip surfaces basically have same shapes at different groundwater levels; however, with the rise of the groundwater level, soil above a seepage line is not affected by the excess pore water pressure, and its sliding scale slightly changes. For soil below the seepage line influenced by the excess pore water pressure, the slip surface constantly extends to the interior of the slope, resulting in the increase in the sliding scale. Due to the cumulative increase in the excess pore water pressure, the bank slope at different groundwater levels is generally manifested as shear sliding at the slope toe and tensile fracture at the top. Finally, based on the shaking table test, the proposed method was verified to be reasonable and accurate. This research provides a simple and reliable method for slope engineering technicians to evaluate the stability of water-rich soil slopes. |
| first_indexed | 2024-12-20T23:41:20Z |
| format | Article |
| id | doaj.art-c63c324b2cb44ad69f48684fe7550cb2 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-20T23:41:20Z |
| publishDate | 2021-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-c63c324b2cb44ad69f48684fe7550cb22022-12-21T19:23:05ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632021-12-01910.3389/feart.2021.799612799612Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water PressureShuai Huang0Shufeng Zhai1Yingjie Liu2Chuanzheng Liu3Katsuichiro Goda4Ben Mou5National Institute of Natural Hazards, MEMC, Beijing, ChinaInstitute of Disaster Prevention, He Bei, ChinaChina Coal Research Institute, Beijing, ChinaNational Institute of Natural Hazards, MEMC, Beijing, ChinaDepartment of Earth Science, Western University, London, ON, CanadaFaculty of Engineering, The University of Hong Kong, Hong Kong, Hong KongSAR, ChinaSoil slopes, located near rivers or the sea, often get damaged dramatically under seismic action due to the high groundwater level. To determine the failure mechanism, this study proposed an analytical method for a composite critical slip surface of a multi-layer slope considering the effects of the excess pore water pressure using the Newmark’s method and variational principle. Based on this, a method for evaluating the effects of the excess pore water pressure on the permanent displacement of the slope under seismic action was established, and influence mechanisms of the excess pore water pressure on failure modes of the multi-layer bank slope at different groundwater levels were studied. The research results show that slip surfaces basically have same shapes at different groundwater levels; however, with the rise of the groundwater level, soil above a seepage line is not affected by the excess pore water pressure, and its sliding scale slightly changes. For soil below the seepage line influenced by the excess pore water pressure, the slip surface constantly extends to the interior of the slope, resulting in the increase in the sliding scale. Due to the cumulative increase in the excess pore water pressure, the bank slope at different groundwater levels is generally manifested as shear sliding at the slope toe and tensile fracture at the top. Finally, based on the shaking table test, the proposed method was verified to be reasonable and accurate. This research provides a simple and reliable method for slope engineering technicians to evaluate the stability of water-rich soil slopes.https://www.frontiersin.org/articles/10.3389/feart.2021.799612/fullmulti-layer slopecomposite critical slip surfaceexcess pore water pressurepermanent displacementshaking table test |
| spellingShingle | Shuai Huang Shufeng Zhai Yingjie Liu Chuanzheng Liu Katsuichiro Goda Ben Mou Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure Frontiers in Earth Science multi-layer slope composite critical slip surface excess pore water pressure permanent displacement shaking table test |
| title | Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure |
| title_full | Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure |
| title_fullStr | Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure |
| title_full_unstemmed | Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure |
| title_short | Seismic Behavior Analysis of the Bank Slope Considering the Effect of Earthquake-Induced Excess Pore Water Pressure |
| title_sort | seismic behavior analysis of the bank slope considering the effect of earthquake induced excess pore water pressure |
| topic | multi-layer slope composite critical slip surface excess pore water pressure permanent displacement shaking table test |
| url | https://www.frontiersin.org/articles/10.3389/feart.2021.799612/full |
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