CCS 水电站输水隧洞双护盾 TBM 穿越不良地质段的处理技术

摘要

The sandstone disintegrating , fault fracture zone collapse , water inrush , surrounding rock instability were en-countered in TBM construction process ,which leading to the low excavation speed ,TBM blocked and other adverse conse-quences .The TBM crossed the unfavorable tunnel section by taking effective measures , which provided a guarantee for completion of water conveyance tunnel timely .%CCS水电站输水隧洞在TBM施工过程中，遇到了砂岩崩解砂化、断层破碎带塌方、突涌水、围岩失稳等不良地质条件，导致了掘进速度缓慢、卡机等不良后果。经过采取有效的处理措施， TBM通过了不良地质段，为输水隧洞的如期完成提供了保障。