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本文根据某电站调压井围岩稳定模型试验研究成果,分析了调压井开挖后围岩应变重分布、上室开挖对调压井应变分布的影响、调压井采用不同支护方式的效果和围岩失稳时的破坏机制。研究结果表明:调压井围岩应变重分布主要取决于地应力特征;上室开挖只扰动调压井与上室衔接部分应变分布;支护方式不同导致围岩破坏荷载、过程、形态不同,但是破坏机制不变。
Based on the research results of stability model tests for the surrounding rock of surge shaft in a power station, this paper analyzes the influence of the strain redistribution of the surrounding rock after surge tank excavation on the strain distribution of the surge shaft and the surge tank with different support methods The effect and failure mechanism of surrounding rock instability. The results show that the strain distribution of surrounding rock in surge shaft mainly depends on the characteristics of ground stress. The excavation of upper chamber only perturbes the strain distribution in the interface between surge tank and upper chamber. The failure modes, , But the damage mechanism remains unchanged.