Numerical simulation method for Surrounding rock stability analysis of surge chamber under seismic conditions

摘要

Underground engineering has broad prospects for development, but its surrounding rock stability' is related to the project construction security as well as operation security. In this paper, quasi-static method is adopted, and based on the surge chamber at the Liuping Hydropower Station, the overall threedimensional model is established to analyses the surrounding rock stability of Surge chamber in complex geological areas under seismic conditions. The compute results show that, the overall stability- of the surge chamber surrounding rock and the lining structure is good, but the safety factor near the left side wall and right spandrel is small. So it is necessary to take the key reinforcement measure and pay the key attention in the construction.