摘要
以某水库库岸滑坡为工程背景,根据饱和-非饱和渗流控制方程,针对不同滑坡体渗透性和库水位升降速率,研究库水位变化条件下滑坡体内孔隙水压力的动态响应,得到:(1)水位升降时,在相同的入渗条件下,饱和渗透系数对初始地下水位有明显的影响;增大饱和渗透系数能降低地下水位,使地下水位线变得平缓,滑坡体的动、静水压力减小,有利于稳定;(2)增加库水位升降速率,地下水位响应滞后变得显著,地下水位线形态整体变陡,滑坡体的动水压力增大,不利于边坡稳定性。
Iandslide in a certain reservoir area is chosen as the engineering background.According to the saturated-unsaturated seepage equation,the dynamic response of pore water pressure in the landslide influenced by the fluctuation of water level is studied when considering the infiltration characteristics and the fluctuation velocity of water level.The analysis results show that(1)when the water level fluctuates,the saturated permeability coefficient has great impact on the initial water level under the same infiltration condition;with the increase of the saturated permeability coefficient,the water level becomes lower,and the water level line becomes more smooth,which has smaller impact on the dynamic and static pore water pressure,and is good to the slope stability;(2)with the increase of fluctuation velocity of water level,the response of water level lags behind,the water level line becomes steeper,which causes greater dynamic pore water pressure to the slope,and is worse to the slope stability.
作者
柳群义
朱自强
何现启
鲁光银
唐军峰
LIU Qun-yi;ZHU Zi-qiang;HE Xian-qi;LU Guang-yin;TANG Jun-feng(School of Info-physics and Geomatics Engineering,Central South University,Changsha 410083,China;School of Resources&Safety Engineering,Central South University,Changsha,410083,China;Central South Design and Research Institute,CHECC Changsha 410014,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第S01期85-89,共5页
Rock and Soil Mechanics
基金
湖南省科技攻关项目(No.05SK3077)
关键词
水位涨落
库岸边坡
孔隙水压力
非饱和渗流
water level fluctuation
slope at reservoir area
pore water pressure
unsaturated seepage
作者简介
柳群义,男,1977年生,博士研究生,主要从事地质灾害的预测预报与评价工作。E-mail:liuqunyicsu2009@126.com
