考虑降雨作用的含张拉裂隙顺层岩坡稳定性分析

发布时间：2018-03-17 02:18

本文选题：降雨入渗　切入点：弱化模式　出处：《人民长江》2017年20期 　论文类型：期刊论文

【摘要】：顺层岩质边坡的稳定性主要取决于软弱层面的性质和地下水对层面的水压力。而目前软弱层面的入渗渐进弱化作用对岩质边坡稳定性影响的分析方法仍不完善。探讨了张裂隙水对软弱夹层面的入渗渐进弱化模式,并结合水力作用给出了入渗作用下岩质边坡稳定性系数和临界降雨强度的表达式。研究结果表明:弱化作用和静水压力对边坡稳定性的影响均与后缘裂隙水位高度(h)和阶段表征值(λL)有关,其稳定性系数随后缘裂隙水位高度和阶段表征值的增加而减小;后缘裂隙临界水位高度和临界降雨强度并不是固定值,而是与边坡所处的入渗阶段有关。
[Abstract]:The stability of bedding rock slope mainly depends on the property of soft layer and the water pressure of groundwater to the layer, but the method of analyzing the influence of gradual weakening of infiltration on the stability of rock slope is still imperfect. In this paper, the progressive weakening model of the infiltration of tensional fissure water to the soft intercalation layer is discussed. The expressions of stability coefficient and critical rainfall intensity of rock slope under infiltration are given. The results show that the influence of weakening action and hydrostatic pressure on slope stability is similar to the high level of fissure water level in the rear edge. It is related to the stage representation value (位 L). The stability coefficient decreases with the increase of the height of the fracture water level and the phase characteristic value, and the critical water level height and the critical rainfall intensity of the rear edge fissure are not fixed values, but are related to the infiltration stage of the slope.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家基础研究计划(973计划)项目(2013CB733202) 国家自然科学基金面上项目(41672282) 四川省青年科技创新研究团队(2015TD0030)
【分类号】：TU457

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