土质洞开挖及支护施工技术的研究与应用

Research and Application of Construction Skills to Excavation and Protection of Tunnel Segment in Deposit Loess Region

以新疆温泉水电站对外交通工程A标段交通洞开挖过程中进洞段出现的风积黄土不良地质围岩的开挖支护方法及施工工艺为依据,详细介绍了交通洞短进尺台阶开挖、超前注浆小导管结合钢拱架支护措施等特殊的开挖支护方法及施工工艺。

According to the methods of excavation and protection, as well as construction skills, aiming at poor texture of rock wall called deposited loess at the very beginning of the tunnel in the process of excavating A segment of external traffic engineering of Wenquan hydroelectric station in XinJiang, the technique of short footage by steps in traffic tunnel excavation, and construction skills such as advanced small conduit used for immiting plasm combining with steel arch shelf protection measures and so on were expounded in the paper.