边挖边衬在水利隧洞工程中的应用

Application of Side-cut Lining in Hydraulic Tunnel Engineering

水利工程隧洞由于洞断面较小(相比于公路和铁路隧道),施工中一般是先全部开挖贯通后,再进行永久混凝土衬砌施工。但近年来,有很多隧洞施工中引入公路隧道中的一些技术,采用了边挖边衬施工的方式进行施工,可以有效解决了不良地质影响,确保了施工安全。特别是在小断面长隧洞中的应用,更是有效利用了围岩的自稳特性,有效的解决了不良地质造成的安全因素,保障了施工的安全进行。以凤庆县郭大寨水库营盘山隧洞施工为例,阐述该方法具体应用。

due to the small section of water conservancy tunnel(compared with road and railway tunnel),the permanent concrete lining construction is usually carried out after all the excavation.However,in recent years,many tunnel construction projects have introduced some technologies in highway tunnel,and adopted the method of excavating and lining,which can effectively solve the adverse geological effects and ensure the construction safety.Especially in the long tunnel with small cross-section,the self-stability of surrounding rock is effectively utilized,the safety factors caused by bad geology are effectively solved,and the safety of construction is ensured.This paper takes the yingpanshan tunnel construction of guodazhai reservoir in fengqing county as an example to illustrate the concrete application of this method.