重庆外环路朝阳寺隧道下穿渝邻高速公路施工

Construction technique of Chaoyangsi tunnel beneath Chongqing-Linshui expressway in outer ring road of Chongqing

主要介绍埋深12.69 m,围岩级别为V级粉砂质泥岩,双线行车的朝阳寺隧道下穿渝邻高速公路施工方案。通过方案比选改为新奥法施工,加强支护措施,提高初期支护强度,有效控制开挖爆破对围岩的扰动,并对既有渝邻高速公路采取安全防护措施,采用监控量测和信息反馈技术,使隧道下穿渝邻高速公路施工顺利通过。

This paper mainly introduces construction scheme of two-way traffic Chaoyangsi tunnel beneath Chongqing-Linshui expressway,the burial depth being 12.69 m and rock level being V level silty mudstone.By comparison,New Austrian Tunneling Method is determined to strengthen support measures,improve initial support strength and control effectively disturbance to rock caused by excavation and explosion,adopting safety protection measures to existing Chongqing-Linshui expressway,and technique of monitoring,measurement and information feedback,to succeed in constructing Chaoyangsi tunnel beneath Chongqing-Linshui expressway.