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针对小埠东橡胶坝坝基渗漏和稳定问题,在采取加固除险措施基础上采用多孔介质稳定渗流理论建立了坝基典型剖面的二维有限元模型,计算了设置和不设混凝土防渗墙的坝基渗流场的位势分布、渗透坡降和单宽流量,分析了防渗墙对坝基渗流场的影响。结果表明,设置防渗墙后,坝基渗透坡降和渗漏量均显著减小,可满足渗透稳定要求。建议增设厚45 cm的混凝土防渗墙。
In view of the seepage and stability problems of Xiaobu East rubber dam foundation, a two-dimensional finite element model of a typical dam foundation was established based on the theory of reinforcement and percolation, and the seepage control theory The potential distribution of the seepage field of the dam foundation, the slope of the seepage gradient and the single-wide flow rate, and analyzes the influence of the seepage prevention wall on the seepage field of the dam foundation. The results show that after setting up the cutoff wall, the seepage gradient and leakage of the dam foundation decrease significantly, which can meet the requirement of stability of infiltration. Proposed to add a 45 cm thick concrete cutoff wall.