喀拉也木勒水库三维渗流数值计算研究

Numerical Calculation of Three-dimensional Seepage in KLYML Reservoir

针对喀拉也木勒水库库区渗漏问题,设计了三种防渗措施,利用有限元程序MIDAS-GTS分别对三种防渗方案以及原地基条件进行了三维渗流计算,分析了各个计算方案下的渗漏量、水力坡降及渗透稳定性,并对库盆防渗措施提出建议。研究结果表明:(1)原地基条件下库区地表附近的渗透坡降超过临界允许值,存在渗透破坏风险。(2)采用全库盆铺设土工膜条件下产生的渗漏量最小。(3)采用黄土和土工膜相结合的防渗方案能起到很好的防渗效果,并且施工简单,能降低成本。

Aiming at the leakage problem in the reservoir area of KLYML reservoir, three anti-seepage measures were designed. Three-dimensional seepage calculations were carried out on the three anti-seepage schemes and the original foundation conditions using the finite element program MIDAS-GTS, and the calculation schemes were analyzed. Under the leakage, hydraulic slope and permeability stability, the appropriate basin anti-seepage measures are recommended. The results show that:(1)Under the ground conditions, the seepage slope near the surface of the reservoir area exceeds the critical allowable value, and there is a risk of seepage damage.(2)The leakage caused by laying the geomembrane in the whole reservoir is the smallest.(3)The anti-seepage scheme combined with loess and geomembrane can achieve a good anti-seepage effect, and the construction is simple and can reduce the cost.