木坡水电站引水隧洞塌方及涌水处理措施

Treatment measures of collapse and water gushing of water diversion tunnel of Mupo Hydropower Station

针对木坡水电站隧洞开挖过程中出现的塌方、涌水等现象,通过分析其围岩地质及地下水特征,采取了超前小导管注浆、超前锚杆支护、钢支撑等方案,有效提高了开挖施工进度,取得了良好的社会效益和经济效益。

In excavation process of the water diversion tennel of Mupo Hydropower station,the collapse and water gushing were occurred. Aiming at this problem,based on analysis of the surrounding rock geology and the underground water features,some countermeasures,such as ahead ductule grouting,ahead anchor bolt support and steel sopport,were adopted. The excavation construction progress was improved effectively,and favorable economic benefit and social effect were obtained.