沂蒙抽水蓄能电站坝基岩体压水试验成果有限元分析

Finite Element Analysis of Water Pressure Test Results of Dam Foundation Rock Mass in Yimeng Pumped Storage Power Station

对坝基开挖前后的二次压水试验成果进行分析,分析研究二次压水试验成果差异特点,结合坝址区工程地质条件,采用有限元数值模拟与工程地质分析紧密结合的方法,对坝址区工程地质条件及坝基开挖后状态进行研究,分析推演出坝基开挖、坝基岩体发生弹性变化、坝基岩体渗透性发生变化是坝基开挖前后的二次压水试验成果出现差异的主要原因,为坝基防渗工程提供了精准的渗透剖面图。

This paper analyzes the results of the secondary water pressure test before and after the excavation of the dam foundation,analyzes and studies the difference characteristics of the results of the secondary water pressure test.Combined with the engineering geological conditions of the dam site area,the method of combining the finite element numerical simulation with the engineering geological analysis is adopted to study the engineering geological conditions of the dam site area and the state of the dam foundation after excavation The main reason for the difference of the results of the secondary water pressure test before and after the excavation of the dam foundation is the change of the permeability of the rock mass of the dam foundation,which provides an accurate seepage profile for the anti-seepage design of the dam foundation.