摘要
研究平推式滑坡中承压水渗流形式对滑坡稳定性的影响,有利于准确评价斜坡稳定性,对此类滑坡的成灾机制研究具有重要的理论指导意义。基于承压水渗流宽度变化规律,将平推式滑坡中底滑面承压水渗流形式分为辐射流和非辐射流。依据不同的渗流形式,构建了相应的平推式滑坡分析模型,结合地下水向河渠稳定运动相关理论,推导了不同模型中承压水的水头线方程和滑面上扬压力的计算公式,提出了扬压力的3种分布形式,并对平推式滑坡启动判据进行修正,最后结合滑坡实例分析了不同渗流形式对滑坡稳定性的影响规律。
It is important to study seepage forms of confined water on translational landslide, which is helpful to accurately evaluate the slope stability and provides a reasonable theoretical guidance for studies on the disaster mechanism on translational landslide. Based on the variation law of seepage width of confined water, the seepage forms of confined water on slide plane of translational landslide are divided into the radiation flow and the non-radiative flow. According to different seepage forms, the translational landslide analysis models are established. Based on the theory of groundwater flow to canals, the water head line equation of confined water and the calculation formula of uplift pressure in different models are deduced. Furthermore, three kinds of uplift pressure distribution forms are put forward, and then the starting criterion of translational landslide is modified. Finally, based on a case of translational landslide, the law of slope stability under different forms of seepage is discussed.
作者
李伟
许强
吴礼舟
李斯琦
LI Wei;XU Qiang;WU Li-zhou;LI Si-qi(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)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2018年第4期1401-1410,共10页
Rock and Soil Mechanics
基金
国家自然科学基金重点项目(No.41630640)
国家创新研究群体科学基金(No.41521002)~~
关键词
平推式滑坡
承压水
渗流形式
扬压力
斜坡稳定性
translational landslide
confined water
seepage forms
uplift pressure
slope stability
