岩质边坡中结构面上水压分布假设的改进研究  

Improvement of water pressure distribution along the structural plane in rock slopes

作　　者：李伟[1,2] 肖蓉[3] 吴礼舟[2] LI Wei XIAO Rong WU Lizhou(College of Environment and Civil Engineering, Chengdu University of Technology , Chengdu, Sichuan 610059, China State Key Laboratory of Geological Hazard Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China College ofLiterature and News Media, Yibin University, Yibin, Sichuan 644000, China)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059 [2]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,四川成都610059 [3]宜宾学院文学与新闻传媒学院,四川宜宾644000

出　　处：《岩石力学与工程学报》2017年第3期599-608,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家科学自然基金重点项目(41130745);国家重点基础研究发展计划(973)项目(2013CB733202);四川省青年科技创新研究团队项目(2015TD0030)~~

摘　　要：探究岩质边坡中结构面上静水压力分布形式,有利于准确评价边坡稳定性,对此类边坡的成灾机制研究具有较好的指导意义。针对传统结构面水压分布假设的不足之处,提出新的水压分布形式,静水压力分布形式与后缘拉张裂隙中充水高度、结构面长度及岩层倾角有关。引入初始静水压力和传递效应的概念,结构面上各点的传递效应随着与结构面上端点的距离增大而线性减弱,详细推导新的静水压力分布形式的计算公式,同时还探索动水压力在结构面上的计算公式,最后通过滑坡实例对比分析不同水压分布假设下边坡稳定性系数变化情况,验证了新假设的合理性。It is important to study the hydrostatic pressure distribution along the structural plane in rock slopes, which is helpful to accurately assess the slope stability and to provide a reasonable suggestion for studying the failure mechanism of this kind of slope. A revised water pressure distribution was proposed to avoid the shortcomings of the traditional assumption of pressure distribution along the structural plane. The hydrostatic pressure distribution is related to the water height in the tension crack, the length of the structural plane and the dip angle. The concepts of the initial hydrostatic pressure and transfer effect are proposed. The transfer effect at each point on the structural plane decreases linearly with the increase of the distance from the point to the start point of the structure plane. The equation for calculating the new hydrostatic pressure distribution is derived and presented in detail. Meanwhile, the equation for calculating the hydrodynamic pressure on the structure plane is also obtained. Finally, the new assumptions and proposed methods are verified based on the analysis of slope stability under the assumptions of different water pressure distributions.

关 键 词：边坡工程 岩质边坡 静水压力 传递效应 动水压力 边坡稳定性 

分 类 号：P642[天文地球—工程地质学]