公路工程双连拱隧道中隔墙施工技术要点研究

Research on Key Technical Points of Partition Wall Construction in Double-Arch Tunnel of Highway Engineering

针对双连拱隧道中隔墙施工时因施工不当引发的拱顶沉降、坍塌、中隔墙开裂或渗水问题,结合岙里对隧道工程,深入研究了隧道中隔墙施工中面临的施工技术难点问题及各工序施工技术要点。针对该工程施工技术难点问题,经采用超前地质预报、监控量测和不同围岩等级中导洞分类支撑支护等措施,为中隔墙施工提供有利条件。经工程实践表明,该工程施工技术措施得当合理,具有一定应用推广价值。

Aiming at the problems of arch roof settlement,collapse,middle partition wall cracking or water seepage caused by improper construction during the construction of partition wall in double-arch tunnel,combined with the tunnel engineering of Ao Li,the construction technical difficulties faced in the construction of partition wall in tunnel and the key points of construction technology in each process are deeply studied.In view of the technical difficulties in the construction of the project,the measures such as advanced geological prediction,monitoring measurement and classified support and support for the middle guide tunnel of different surrounding rock grades are adopted to provide favorable conditions for the construction of the middle partition wall.The engineering practice shows that the construction technical measures of the project are proper and reasonable,and it has certain application and popularization value.