大河桥水库坝体防渗处理技术

Study on Seepage Control of Daheqiao Reservoir Dam

以大河桥水库除险加固工程为例,探讨了防渗墙在坝体防渗中的应用,综合分析了大坝内理论浸润线分布、各测点压力水头等重要的渗流特征参数,并运用有限元法复核计算增设防渗墙前后的坝体渗流.结果表明,实测浸润线与渗流有限元法数值模拟结果能够较好地吻合,水库坝体防渗处理方案可行,有效解决了渗漏问题,改善了水库的运行条件,为相关工程设计提供了依据.

Taking reinforcement project of Daheqiao Reservoir for an example, the application of cut-off wall to darn seepage prevention is preliminary discussed. By comparison of dam seepage stability with and without cut-off wall, some important characteristic parameters of seepage such as theoretical seepage line distribution inside embankment dam, pressure head at every measurement point are comprehensively analyzed, and seepage characteristics with and without cut-off wall are calculated and checked using finite element methed. The results show that the measured seepage lines better match numerical simulation results calculated by finite element method. Therefore, dam seepage control scheme is feasible. The scheme can efficiently solve the seepage problem, improve the reservoir operating condition greatly. This can provide a basis for engineering design related.