天荒坪抽水蓄能电站试验洞的位移反分析研究

Deformation Back Analysis of Test Tunnel of Tianhuangping Pumped Storage Project

为查明天荒坪抽水蓄能电站地下厂房所在位置围岩初始地应力场的情况,沿厂房的拟设轴线开挖了模型试验洞,量测了围岩位移与洞周收敛位移,并据以进行了反分析计算。文中所用的数值计算法为边界单元性,包括弹性问题和粘弹性问题的反演计算,所得初始地应力的方向及量值与以其它方法测得的结果符合较好。

In order to ascertain the initial stress field in rock around the underground powerhouse of Tianhuang-ping project, a test tunnel was excavated along its longitudinal axis and deformation in the surrounding rock and convergence deformation on the boundary of the opening were measured. Back analysis on elasticity was proceeded based on the measurements by BEM. Results agreed with those measured by other methods.