小断面长隧洞开挖支护施工难点分析

Analysis of Difficulties in Excavation and Support Construction of Small Section Long Tunnel

随着水资源配置工程建设发展趋势,输水工程中小断面长隧洞工程越来越多,小断面隧洞施工由于受断面大小影响,操作空间受限,对于土石方开挖运输效率存在极大影响.根据不同断面尺寸及形式,制定不同的施工方案,有针对性地采取施工方法,有利于工程施工安全、质量及进度目标得以实现.

With the development trend of water resource allocation engineering construction,there are more and more small cross-section long tunnel projects in water transmission engineering.The construction of small cross-section tunnels is greatly affected by the size of the cross-section and the limited operating space,which greatly affects the efficiency of earthwork excavation and transportation.Developing different construction plans based on different cross-sectional dimensions and forms,and adopting targeted construction methods,is conducive to achieving the safety,quality,and progress goals of engineering construction.