某大坝存在问题及处理方案比选

Existing Problems of a Dam and Comparison of the Solutions

某大坝防渗加固工程设计对现有工程总体布置不作变动,结合现状水库防洪能力不满足规范要求,坝体填筑质量也存问题,黏土心墙填筑质量不满足规范要求等实际情况,通过对坝体、坝基渗透原因进行分析,对劈裂黏土灌浆、深层搅拌桩、浇注塑性混凝土防渗墙3种防渗加固处理方案进行比选,最终决定大坝坝体渗漏处理采用深层水泥土搅拌桩防渗墙。坝顶上游侧增设防浪墙,结合坝体防渗加固处理使防渗体顶部高程满足规范要求。

The design of a dam anti-seepage reinforcement project maintains the overall layout of the current project.Combined with the fact that the insufficient flood control capacity of the reservoir,problems in the dam filling quality,the failing quality of the clay core wall filling and other actual conditions,three kinds of anti-seepage reinforcement treatment schemes,which are splitting clay grouting,deep mixing pile and pouring plastic concrete anti-seepage wall,are compared through the analysis of the causes of seepage in the dam body and foundation.Finally,it is decided that the seepage treatment of dam body adopts deep cement soil mixing pile cutoff wall.A wave wall is added at the upstream side of the dam crest,and the top elevation of the impervious core meets the specification requirements in combination with the anti-seepage reinforcement treatment of the dam body.