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昌图引水隧洞出口段岩溶发育、充填物比较复杂且强度低。开挖时采用超前管缝式锚杆钢支撑联合支护形式进行,塌方时采取先喷后支再清理的方式来处理,取得显著效果。
Changtu diversion tunnel exit karst development, filling more complex and low strength. Excavation using advanced seam anchor bolt steel support form of joint support, landslides to take the first spray after the branch and then clean up the way to achieve significant results.