天生桥二级水电站第二台掘进机拆除场的洞室设计

Design of the cavern for dismantling No。2 TBM at TSQ-Ⅱ Hydropower Station

本文介绍了在不良的地质条件下开挖大型洞室，为了某种特殊原因的需要，针对不同的地质情况，采用不同的支护形式，是能取得良好效果的。

This article describes the excavation of large size cavern under adverse geological conditions。Derivedfrom special requirement for certain specific reason,good result can be obtained by means of different kinds ofsupports for different geological conditions。