阴坪水电站泄洪闸深厚覆盖层地基渗流分析

Seepage Analysis of Deep Overburden Foundation of Sluice Gate for Yinping Hydropower Station

分析深厚覆盖层条件下大坝的渗流特性,对于保证大坝防渗体系及工程整体安全有重要意义。结合ANSYS大型有限元分析软件,以阴坪水电站为例,研究了在深厚覆盖层及复杂地基情况下,闸基在各典型工况的渗透特性,并对各覆盖层渗透性、防渗墙深度及水平铺盖长度进行了敏感性分析。结果表明,各工况下的渗流参数符合规范要求,对于阴坪水电站深厚覆盖层基础,采用垂直混凝土防渗墙加水平铺盖的防渗措施安全有效,渗流量与渗透坡降均很小,满足渗流稳定性要求。研究成果可供类似工程参考。

Analysis of seepage characteristics of dam under deep overburden conditions is of great significance to the overall safety of the project.Taking the Yingpin Hydroelectric Project as an example,the paper studied the permeability characteristics of the sluice foundation in different typical working conditions and the sensitivity analysis of cover layer permeability,depth of cut-off wall and the blanket length by using the software of finite element analysis(ANSYS).The results show that the permeability parameters in different working conditions meet the requirements of the relevant standard,it is reasonable and effective by using the vertical concrete anti-seepage wall.The amount of seepage and gradient are small,and they meet the stability requirements of seepage.The research results might be useful to the similar projects.