库水位升降作用下土质边坡渗流场动态变化研究  

Study on dynamic variation law of soil slope seepage field under reservoir water level fluctuation condition

作　　者：梁学战[1] 唐红梅[1] 向杰[1] 赵先涛[1] 陈洪凯[1] 

机构地区：[1]重庆交通大学岩土工程研究所,重庆400074

出　　处：《人民长江》2013年第9期55-59,共5页Yangtze River

基　　金：国家自然科学基金项目(41071017);重庆市自然科学基金重点项目(2012BA0018)

摘　　要：为探索水库边坡尤其是土质边坡在库水位升降条件下渗流场的变化规律及边坡的稳定性,建立了较大比例尺的库岸土质边坡地质试验模型。用孔压计测得试验模型的孔隙水压力随水位升降的变化值,以非饱和渗流理论为基础,并结合试验所测数据,用Geostudio有限元数值分析软件SEEP/W模块进行水位升降条件下的瞬态渗流场模拟。结果表明:坡体孔隙水压力随试验水位的升降而变化,坡体位置高程越高,孔隙水压力和基质吸力变化的滞后性越明显。孔隙水压力模拟值与计算值基本一致,表明模拟所选参数和水土特征曲线能反映模型试验情况。Reservoir water level fluctuation has a significant effect on variation of soil slope seepage field and slope stability. A large scale geological test model of soil slope was established, and the variation value of the pore water pressure of the model was measured when the reservoir water level fluctuated. On the basis of unsaturated seepage theory, combining with the measured da- ta in the test, we simulated the transient seepage field with the SEEP/W program of Geostudio analysis software under reservoir water level fluctuation. The results indicate that slope pore water pressure varies with reservoir water level fluctuation. Since the higher the slope elevation is, the more notable the lag effect of the pore water pressure and matrix suction is. The pore water pres- sure is consistent with the measured values, which demonstrates that the parameters and the soil - water characteristics curve se- lected can reflect the reality of the model test.

关 键 词：水位升降 模型试验 土质边坡 渗流场 

分 类 号：P642[天文地球—工程地质学]