At present, deformation of emptying tunnel surrounding rock is convergent, physical monitoring indexes are of the downward trend.
目前放空洞围岩变形已趋于收敛，监测物理量呈下降趋势。
Based on the numerical simulation, the check gate contraction section and the vertical-curve section of the emptying tunnel are optimized.
通过数值模拟方法对放空洞检修闸收缩段和龙抬头竖弯段进行了优化。
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