库水位升降作用下库岸边坡渗流特征研究

Study on seepage characteristics of reservoir bank slopes under water level fluctuation

以某库岸边坡工程为例,在对其地质环境调查研究的基础上,运用GEO-SLOPE软件中SEEP/W模块,较为全面地模拟了库岸边坡库水位升降下的渗流场。从库水位上升、水位保持及水位下降三阶段出发,分析了库区内分布较广的强风化泥质砂岩、泥灰岩类型的岸坡在水库升降变化作用下其渗流特征及分布变化规律、水岩相互作用;分析了该库岸边坡的孔隙水压力变化特征和渗流速度动态变化规律,为进一步渗流与变形耦合分析提供了依据。

Taking a reservoir bank slope as example,based on the geological environment study data, using SEEP / W module of GEO-SLOPE software,the seepage field of the reservoir slope under reservoir water level fluctuation is simulated comprehensively. The seepage characteristics and variation,water-rock interaction under water level changes of highly weathered argillaceous sandstones and marl rock formed slopes which are widely distributed around reservoir bank are analyzed from three stages of reservoir water level fluctuation,rising,steady,and dropping; pore water pressure and seepage flow velocity of the slope around reservoir bank are analyzed. The computational results provide a basis for further study of interaction between seepage and the deformation of reservoir bank slope.