Improved transfer coefficient method considering multistage sliding of rainfall landslides
In the progressive failure process of multiple landslides, different parts of the slip zone have different yielding degrees and failure modes with different strength parameters. Under strong rainfall conditions, water-filled tension cracks generated on the slope surface give rise to hydrostatic pres...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Bulletin of Geological Science and Technology
2022-11-01
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| Series: | 地质科技通报 |
| Subjects: | |
| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0231 |
| _version_ | 1797277587078119424 |
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| author | Hao Wen Guoqing Chen Hong Li Jin'gen Ma Zhanglei Wu |
| author_facet | Hao Wen Guoqing Chen Hong Li Jin'gen Ma Zhanglei Wu |
| author_sort | Hao Wen |
| collection | DOAJ |
| description | In the progressive failure process of multiple landslides, different parts of the slip zone have different yielding degrees and failure modes with different strength parameters. Under strong rainfall conditions, water-filled tension cracks generated on the slope surface give rise to hydrostatic pressure. The current widespread transfer coefficient method, which takes the same strength parameter for different locations of the slip zone, also has not yet taken into account the hydrostatic pressure effect. In this paper, we propose an improved transfer coefficient method which takes into account the hydrostatic pressure effect and the difference in strength parameters of different parts of the slip zone. The results show that, compared with the calculation method without considering the hydrostatic pressure and the difference in strength parameters in different parts of the slip zone, the anti-sliding force calculated by the improved transfer coefficient method is relatively small, the residual sliding force is relatively large, and the stability coefficients of landslides at all levels are reduced by approximately 33.26%, 17.92%, 24.95% and 16.94%, respectively. Based on the high stability coefficient before the improvement, it may lead to insufficient safety reserve of the retaining engineering. The improved transfer coefficient method proposed in this paper can provide a safer reference for multiple landslide disposal. |
| first_indexed | 2024-03-07T15:50:34Z |
| format | Article |
| id | doaj.art-a381b749583641ef8fea076f3313bdbe |
| institution | Directory Open Access Journal |
| issn | 2096-8523 |
| language | zho |
| last_indexed | 2024-03-07T15:50:34Z |
| publishDate | 2022-11-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
| record_format | Article |
| series | 地质科技通报 |
| spelling | doaj.art-a381b749583641ef8fea076f3313bdbe2024-03-05T02:57:40ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232022-11-0141616216810.19509/j.cnki.dzkq.2022.0231dzkjtb-41-6-162Improved transfer coefficient method considering multistage sliding of rainfall landslidesHao Wen0Guoqing Chen1Hong Li2Jin'gen Ma3Zhanglei Wu4State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaChengdu Engineering Corporation Limited, Power Construction Corporation, Chengdu 610072, ChinaChengdu Engineering Corporation Limited, Power Construction Corporation, Chengdu 610072, ChinaIn the progressive failure process of multiple landslides, different parts of the slip zone have different yielding degrees and failure modes with different strength parameters. Under strong rainfall conditions, water-filled tension cracks generated on the slope surface give rise to hydrostatic pressure. The current widespread transfer coefficient method, which takes the same strength parameter for different locations of the slip zone, also has not yet taken into account the hydrostatic pressure effect. In this paper, we propose an improved transfer coefficient method which takes into account the hydrostatic pressure effect and the difference in strength parameters of different parts of the slip zone. The results show that, compared with the calculation method without considering the hydrostatic pressure and the difference in strength parameters in different parts of the slip zone, the anti-sliding force calculated by the improved transfer coefficient method is relatively small, the residual sliding force is relatively large, and the stability coefficients of landslides at all levels are reduced by approximately 33.26%, 17.92%, 24.95% and 16.94%, respectively. Based on the high stability coefficient before the improvement, it may lead to insufficient safety reserve of the retaining engineering. The improved transfer coefficient method proposed in this paper can provide a safer reference for multiple landslide disposal.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0231improved transfer coefficient methodmultiple landslidestability evaluationlandslide progressive failure characteristicshydrostatic pressure effectrainfall |
| spellingShingle | Hao Wen Guoqing Chen Hong Li Jin'gen Ma Zhanglei Wu Improved transfer coefficient method considering multistage sliding of rainfall landslides 地质科技通报 improved transfer coefficient method multiple landslide stability evaluation landslide progressive failure characteristics hydrostatic pressure effect rainfall |
| title | Improved transfer coefficient method considering multistage sliding of rainfall landslides |
| title_full | Improved transfer coefficient method considering multistage sliding of rainfall landslides |
| title_fullStr | Improved transfer coefficient method considering multistage sliding of rainfall landslides |
| title_full_unstemmed | Improved transfer coefficient method considering multistage sliding of rainfall landslides |
| title_short | Improved transfer coefficient method considering multistage sliding of rainfall landslides |
| title_sort | improved transfer coefficient method considering multistage sliding of rainfall landslides |
| topic | improved transfer coefficient method multiple landslide stability evaluation landslide progressive failure characteristics hydrostatic pressure effect rainfall |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0231 |
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