考虑水库水位变化和降雨综合影响的改进传递系数法及其在多级滑动古滑坡稳定性评价中的应用

Water Supply Pub Date : 2024-03-05 DOI:10.2166/ws.2024.047
Xiaofeng Gou, Mo Xu, Xiao Li, An-run Li, Hui Deng
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引用次数: 0

摘要

本文通过考虑水库水位变化引起的动水压力和颗粒迁移效应、降雨入渗对滑动带土体的削弱效应以及多级滑动体之间的相互作用力,提出了水库水位变化和降雨共同作用下多级滑动古滑坡的改进传递系数法。结果表明:(1)水库水位变化和降雨的共同作用对多级滑动古滑坡的稳定性有显著影响。(2)改进的传递系数法计算的滑动力小于传统传递系数法的计算结果,且残余滑动力较大。不同滑动体稳定系数分别降低了约 28.84%、18.13%、19.26% 和 21.01%。(3)传统传递系数法计算的稳定结果高于改进传递系数法,可能导致多级滑动古滑坡稳定状态判断出现偏差。(4)该改进传递系数法可为水电站库区多级滑动古滑坡稳定性精确评价提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An improved transfer coefficient method considering the combined effect of reservoir level variation and rainfall and its application in the stability evaluation of multistage sliding ancient landslides
In this paper, by considering the dynamic water pressure and particle migration effect caused by reservoir level variation, the weakening effect of slip zone soil influenced by rainfall infiltration, and the interaction force between multistage sliding bodies, an improved transfer coefficient method for multistage sliding ancient landslide is proposed under the combined action of reservoir level variation and rainfall. The results show that (1) the combined action of reservoir level variation and rainfall has a significant influence on the stability of multistage sliding ancient landslides. (2) The sliding force calculated by the improved transfer coefficient method is smaller than the calculation result by the traditional transfer coefficient method, and the residual sliding force is larger. The different sliding body stability coefficient is reduced by about 28.84, 18.13, 19.26, and 21.01%, respectively. (3) The stability results calculated by the traditional transfer coefficient are higher than the improved transfer coefficient method, which may lead to deviation in the multistage sliding ancient landslide stable state judgment. (4) This improved transfer coefficient method can provide a reference for the multistage sliding ancient landslides stability accurate evaluation in hydropower station reservoir area.
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