库水位下降时库岸边坡浸润线变化规律与稳定性研究  

Variation Rule of Phreatic Line and Stability Analysis of Reservoir Slope under Drawdown Conditions

作　　者：曹伟[1,2] 徐卫亚[1,2] 孟庆祥[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程科学研究所,南京210098

出　　处：《三峡大学学报（自然科学版）》2014年第6期15-19,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家重点基础研究发展计划(973项目)(2011CB013504)"复杂环境下工程边坡岩体时效力学特性"

摘　　要：根据地下水动力学中的布西涅斯克(Boussinesg)方程,通过拉氏变换和逆变换,推导出库水位下降时的浸润线计算公式,对公式进行简化并编制程序进行数值模拟.将数值模拟所得浸润线导入边坡稳定性分析软件SLIDE,分"搜索滑面"和"固定滑面"两种模式对算例边坡进行稳定性分析.分析表明,两种模式下安全系数变化规律既有共同点,也有各自特点,实际工程中,需要针对不同边坡选取不同模式分析,才能更符合实际情况.Based on Boussinesq equation of unsteady seepage and Laplace transform, a simplified formula of phreatic line in reservoir slope under drawdown conditions, is derived. Based on the formula, a computation program has been written to simulate the variation of the phreatic line. According to the phreatic line genera- ted from the program above , the stability analysis of reservoir slope is analyzed by the SLIDE program of Rocscience analysis software in two different search methods, i.e. grid search and block search. Example a- nalysis shows that the change rule of safety factor in two methods both have in common and their own charac- teristics. It is necessary to select different method according to different slope in practical engineering.

关 键 词：库水位下降 库岸边坡 浸润线 渗流 稳定性分析 

分 类 号：TU457[建筑科学—岩土工程]