防渗体形式对土坝除险加固工程渗流稳定的影响

Effects of anti-seepage body forms on seepage and stability of reinforcement project for earth dam

从渗流和边坡稳定的角度出发,论述了土坝加固工程中防渗体形式和尺寸选择的条件和要求,结合工程实例给出了土坝加固工程中不同防渗体形式(厚度、位置)对坝体渗流和稳定的影响数值计算结果和规律,特别介绍了土坝防渗体形式对土坝边坡逸出坡降、边坡稳定性的影响.计算结果表明:不论是考虑稳定渗流还是非稳定渗流,土坝防渗墙位置越靠近上游坝坡,防渗效果越好;防渗墙设置越厚,防渗效果越好.以期本结论对于工程设计提供一定的借鉴和参考.

From the perspective of seepage and slope stability, the conditions and requirements for selecting body form and size of requirement, project of earth dam are discussed, combining with engineering examples and given different anti-seepage body forms in reinforcement project of earth dam （thickness, position） influence on dam seepage and stability of the numerical calculation results and laws are given, especially the earth dam seepage prevention body form escape slope, slope stability of earth dam slope. The calculation results show that both consider ing steady seepage and unsteady seepage, cut-off wall location closer to the upstream dam slope, earth dam seepage prevention effect is better; the thick cut-off wall, seepage control effect is better. In the hope of our conclusions provides certain reference for engineering design.