隧道拱顶塌腔处理及防治方法分析

Analysis of Treatment and Prevention methods for Tunnel Arch Collapse

介绍省道S207线闽浙界至寿宁下党段公路工程杨溪头2号隧道工程拱顶塌腔处理的施工实践,针对隧道围岩节理裂隙发育状况及不良地质水文情况引发的拱顶塌腔,着重分析拱顶塌腔发生原因、拱顶塌腔防治办法,以及塌腔处理的系列针对性举措等,并结合地质超前预报、围岩监控量测等手段,实时动态分析围岩支护,跟踪支护效果,以有效预防隧道塌方。

This paper introduces the construction practice of arch caving treatment in Yangxitou No.2 tunnel of the highway project from Minzhe to Xiadang Section of Shouning on Provincial Road S207.In view of the arch caving caused by the joint and crack development of tunnel surrounding rock and poor geological and hydrological conditions,this paper focuses on analyzing the causes of arch caving,the prevention methods of arch caving and a series of targeted measures for caving treatment.Combined with geological advance prediction,surrounding rock monitoring and measurement,real-time dynamic analysis of surrounding rock support,tracking support effect,in order to effectively prevent tunnel collapse.