宜良县海马箐水库导流、输水泄洪隧洞工程开挖中的问题及处理措施

The Water Problems during Excavation of Water-Supply and Spillway Tunnel and the Treatment Measures of Haimaqing Reservoir in Yiliang County

本文以宜良县海马箐水库工程为例,阐述小洞径隧洞在开挖施工过程中遇到的不良地质、洞内地下水渗漏、塌方,超、欠挖等常见问题,提出解决方案:浅钻孔、多循环、弱爆破、强支护,以及"以排为主,防、截、堵相结合"的渗漏综合治理原则,对类似工程具有积极的借鉴作用。

Taking Haimaqing Reservoir in Yiliang County as an example, during small-diameter tunnel excava-tion process, unexpected problem were encountered, such as geological conditions, ground water seepage, col-lapse, overbreak or underbreak and other common problems. Solutions were proposed as below： shallow drilling, more circulation, weak blast, strong support. ＂The main thing is draining off water, also combining with water-proof and catch-drain＂ , the principle of comprehensive control of seepage, it can provides reference to similar projects.