浅埋暗挖支护工艺在南水北调输水隧洞工程中的应用

Application of supporting technology to shallow-buried and sub-surface excavated water conveyance tunnel for South-to-North Water Transfer Project

输水隧洞工程是南水北调南干渠工程中重要组成部分,在其施工时主要采用了浅埋暗挖施工工艺。文中详细介绍了该施工工艺中的超前支护、初期支护、钢格栅的安装及挂网、喷射混凝土以及支护背后回填灌浆等施工工序和注意事项,总结了该施工工艺具有环保和对周围环境影响较小的特点,旨在为同类工程施工提供参考。

The water conveyance tunnel is an important part of the South Main Canal for the South-to-North Water Transfer Pro- ject, to which the construction technology of shallow-buried and sub-surface excavation is mainly applied. The construction proce- dures of the construction technology such as advancing supporting, initial supporting, steel grating installation and network hang- ing, shot-concreting, back-filling grouting for supporting, etc., and the relevant key attentions are described in detail herein, and then the environment protection characteristics of the construction technology with less impact on the surrounding environment are also summarized, so as to provide reference for the construction of the similar project concerned.