First sliding area analysis of expansive soil slope based on the upper and lower bound solutions
Expansive soil landslides are prone to frequent disasters due to the expansion, cracking, and over-consolidation characteristics of expansive soil. However, traditional analysis methods cannot adequately reflect the progressive failure characteristic of expansive soil slopes, and effectively estimat...
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Editorial Office of Hydrogeology & Engineering Geology
2025-01-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202311059 |
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| author | Weiming HE Shengwei SHI Qiang CAI Jiong LIANG |
| author_facet | Weiming HE Shengwei SHI Qiang CAI Jiong LIANG |
| author_sort | Weiming HE |
| collection | DOAJ |
| description | Expansive soil landslides are prone to frequent disasters due to the expansion, cracking, and over-consolidation characteristics of expansive soil. However, traditional analysis methods cannot adequately reflect the progressive failure characteristic of expansive soil slopes, and effectively estimate the first sliding area. To better understand the disaster characteristics of expansive soil slopes and quantify the phased disaster scale, based on the change of the tangential force direction at the bottom of some soil strips caused by water swelling of expansive soil, the upper and lower bound solutions of the first sliding area of slope are analyzed. The sliding trend critical point of expansive soil slope is strictly derived using the Morgenstern-Price static equilibrium analysis method. A case study is used to illustrate the calculation and analyze the influence of shear strength on the upper solution and lower solutions. The results show that partial and progressive failure may still occur on expansive soil slope under the influence of expansion although they are determined to be stable by classical analysis methods. The upper bound solution of the first slip area is less affected by the effective shear strength, while the influence of residual shear strength on the lower bound solution is particularly significant. The upper bound solution and its change rate decrease with the increase of effective cohesion and effective internal friction angle, while the lower bound solution and its change rate increase with the increase of residual internal friction angle and residual cohesion. In addition, the stability of expansive soil slope can be determined based on the relationship between the upper and lower limit solutions. This study provides the basic information for evaluating disaster scales and designing prevention and control measures for expansive soil landslides. |
| format | Article |
| id | doaj-art-9155ce15f8b64132af3694580e4cc39f |
| institution | Kabale University |
| issn | 1000-3665 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj-art-9155ce15f8b64132af3694580e4cc39f2025-01-18T03:52:24ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652025-01-0152110411210.16030/j.cnki.issn.1000-3665.202311059202311059First sliding area analysis of expansive soil slope based on the upper and lower bound solutionsWeiming HE0Shengwei SHI1Qiang CAI2Jiong LIANG3Institute of Exploration Technology, Chinese Academy of Geological Sciences, Chengdu, Sichuan 611734, ChinaKunming General Survey of Natural Resources Center, China Geological Survey, Kunming, Yunnan 650111, ChinaInstitute of Exploration Technology, Chinese Academy of Geological Sciences, Chengdu, Sichuan 611734, ChinaInstitute of Exploration Technology, Chinese Academy of Geological Sciences, Chengdu, Sichuan 611734, ChinaExpansive soil landslides are prone to frequent disasters due to the expansion, cracking, and over-consolidation characteristics of expansive soil. However, traditional analysis methods cannot adequately reflect the progressive failure characteristic of expansive soil slopes, and effectively estimate the first sliding area. To better understand the disaster characteristics of expansive soil slopes and quantify the phased disaster scale, based on the change of the tangential force direction at the bottom of some soil strips caused by water swelling of expansive soil, the upper and lower bound solutions of the first sliding area of slope are analyzed. The sliding trend critical point of expansive soil slope is strictly derived using the Morgenstern-Price static equilibrium analysis method. A case study is used to illustrate the calculation and analyze the influence of shear strength on the upper solution and lower solutions. The results show that partial and progressive failure may still occur on expansive soil slope under the influence of expansion although they are determined to be stable by classical analysis methods. The upper bound solution of the first slip area is less affected by the effective shear strength, while the influence of residual shear strength on the lower bound solution is particularly significant. The upper bound solution and its change rate decrease with the increase of effective cohesion and effective internal friction angle, while the lower bound solution and its change rate increase with the increase of residual internal friction angle and residual cohesion. In addition, the stability of expansive soil slope can be determined based on the relationship between the upper and lower limit solutions. This study provides the basic information for evaluating disaster scales and designing prevention and control measures for expansive soil landslides.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202311059expansive soil slopefirst sliding areastability of slopeupper and lower bound solutionmorgenstern-price method |
| spellingShingle | Weiming HE Shengwei SHI Qiang CAI Jiong LIANG First sliding area analysis of expansive soil slope based on the upper and lower bound solutions Shuiwen dizhi gongcheng dizhi expansive soil slope first sliding area stability of slope upper and lower bound solution morgenstern-price method |
| title | First sliding area analysis of expansive soil slope based on the upper and lower bound solutions |
| title_full | First sliding area analysis of expansive soil slope based on the upper and lower bound solutions |
| title_fullStr | First sliding area analysis of expansive soil slope based on the upper and lower bound solutions |
| title_full_unstemmed | First sliding area analysis of expansive soil slope based on the upper and lower bound solutions |
| title_short | First sliding area analysis of expansive soil slope based on the upper and lower bound solutions |
| title_sort | first sliding area analysis of expansive soil slope based on the upper and lower bound solutions |
| topic | expansive soil slope first sliding area stability of slope upper and lower bound solution morgenstern-price method |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202311059 |
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