彭水枢纽地下洞室开挖应力及稳定试验研究

Experimental Study on Stress and Stability of Pengshui Project’s Underground Grottos During Excavation

采用地质力学模型平面应变试验技术，模拟彭水枢纽地下厂房洞室围岩的构造特点和力学性能，分析研究了主厂房、调压小井在开挖过程中的围岩应力、洞周位移、Ｆ１断层对洞室稳定的影响及洞室围岩破坏机理等。

This paper presents the results obtained from the geomechanics model test on the structural features and mechanical properties of the surrounding rockmass around the Pengshui Project’s underground plant by using the plane strain testing technique, and analyses the stresses, displacements and stability of the surrounding rockmass around the main factory buildings and a small surge shaft during excavation, the influence of F 1 fault on grottos’ stability and its failure mechanism.