阴坪水电站厂区初始地应力反演与三维地应力

An Analysis of Initial Field Stress and Three-dimensional Ground Stress near the Underground Excavation of Yinping Hydropower Station

结合阴坪水电站厂区地应力实测资料,以ANSYS软件为平台,构建厂区地应力反演计算模型,采用位移函数法对阴坪水电站厂区岩体地应力进行反演分析,从而获得了初始应力场资料。同时,对精细模型的主应力分布及拟开挖的地下洞室群附近的各主应力进行了分析,结果表明实测点处地应力的计算值与实测值吻合较好,可用于地下洞室群围岩稳定性分析的精细模型中。

This paper analyzes the data about the ground stress of the Yinping Hydropower Station in Sichuan .By using ANSYS software as a development platform ,the three-dimensional calculation model has been built .By applying the displacement function method ,the data of initial stress field have been obtained .At the same time ,the principal stress distribution of the detailed model and the principal stress near the underground excavation have been analyzed .The result shows that the analytic results of initial stress fields are in accord with the stress values of the measured points .It can be applied to the analyze the stability of the detailed model of the underground excavation .