Reliability analysis of slope with dominant seepage interlayer under rainfall infiltration

Xiao Jinghong; Wang Min; Wang Chuan; Leng Xianlun

doi:10.19509/j.cnki.dzkq.2021.0619

Volume 40 Issue 6

Nov. 2021

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Article Navigation > Bulletin of Geological Science and Technology > 2021 > 40(6): 193-204

Xiao Jinghong, Wang Min, Wang Chuan, Leng Xianlun. Reliability analysis of slope with dominant seepage interlayer under rainfall infiltration[J]. Bulletin of Geological Science and Technology, 2021, 40(6): 193-204. doi: 10.19509/j.cnki.dzkq.2021.0619

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Xiao Jinghong, Wang Min, Wang Chuan, Leng Xianlun. Reliability analysis of slope with dominant seepage interlayer under rainfall infiltration[J]. Bulletin of Geological Science and Technology, 2021, 40(6): 193-204. doi: 10.19509/j.cnki.dzkq.2021.0619

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Reliability analysis of slope with dominant seepage interlayer under rainfall infiltration

doi: 10.19509/j.cnki.dzkq.2021.0619

Xiao Jinghong^1
,,
Wang Min¹,
Wang Chuan^{2, 3},
Leng Xianlun^{2, 3
,
,}

Received Date: 25 Jun 2021

Abstract

Abstract

Slopes with dominant seepage interlayers (DSI)often have relatively high uncertainty in their seepage field under the action of rainfall infiltration, which brings difficulties to the stability evaluation.In this regard, probabilistic methods are usually used to analyze the stability of such slopes.For analyzing the reliability of slopes with DSI under rainfall infiltration, the point estimation-finite element method used in the stress analysis was introduced to the slope seepage-stability analysis, and a method for seepage probability and reliability analysis of slopes was developed considering the uncertainty of permeability of DSI.Then, by taking a soil slope with gravel interlayer acting as DSI in Guangxi Province as the engineering case, the seepage probability of DSI under rainfall infiltration was analyzed, and then the slope reliability analysis was conducted based on the seepage probability.Results show that:① In the slope with DSI, the depth of rainwater infiltration along DSI is significantly higher than that along the slope surface; the uncertainty of the permeability of DSI has a great impact on the seepage field, which results in the strong uncertainty of slope stability; ② With the rainwater infiltration in the slope with DSI, the failure probability of different potential slip surfaces generally increases, and the position of the most dangerous slip surface evolves from the upper part to the lower part of the slope. The prediction of the position of slip surface is consistent with the practice; ③The proposed probability analysis method, with the advantages of small calculation amount, is suitable and can be used as a new method for analyzing the stability of slopes with DSI under the influence of rainfall infiltration.
- dominant seepage interlayer,
- slope stability,
- rainfall infiltration,
- seepage probability,
- reliability

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References(42)

References

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Reliability analysis of slope with dominant seepage interlayer under rainfall infiltration

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Reliability analysis of slope with dominant seepage interlayer under rainfall infiltration

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