新建高速公路隧道与配水工程支洞近接施工方案比选研究  

Research on Comparison and Selection of Proximity Construction Plans for the Branch Tunnel of Water Distribution Engineering and the New Expressway Tunnel

作　　者：吴根强 郑军华 张海忠 丁海洋 莫晨聪 WU Gen-qiang;ZHENG Jun-hua;ZHANG Hai-zhong;DING Hai-yang;MO Chen-cong(Zhejiang Institute of Communications Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]浙江数智交院科技股份有限公司,浙江杭州310000

出　　处：《浙江交通职业技术学院学报》2025年第1期24-32,共9页Journal of Zhejiang Institute of Communications

摘　　要：本文从设计变更的角度,综合考虑安全性、施工便捷性、工期、造价、社会影响等因素对某新建高速公路隧道与配水工程支洞近接施工方案进行了比选研究。研究结果表明:当高速公路隧道与配水工程支洞最小净距为2.2m时,只通过加强隧道自身的支护参数不能保证支洞初期支护的结构安全,需对中间岩体提前加固、隧道提前施作初支和二衬、对支洞洞周进行加固和对支洞原有的衬砌结构进行加强设计;当高速公路隧道与配水工程支洞最小净距为8.4m时,只需加强隧道自身的支护参数和对中间岩体提前加固、对支洞必要时采用预应力长锚杆及钢拱架临时支撑等加固措施;在项目实际变更过程中,更注重考虑隧道施工的安全性、便捷性。本文的分析过程和结论可供其他类似工程参考。From the perspective of design change,a comparative study was conducted on the construction plan for a new expressway tunnel and the branch tunnel of water distribution engineering,taking into account factors such as safety,construction convenience,construction period,cost,and social impact.The research results indicate that:when the minimum clear distance between the expressway tunnel and the branch tunnel of water distribution engineering is 2.2m,simply strengthening the support parameters of the tunnel itself cannot guarantee the structural safety of the initial support of the branch tunnel.Therefore,it is necessary to reinforce the intermediate rock mass in advance,apply initial support and secondary lining to the tunnel in advance,reinforce the surrounding area of the branch tunnel,and strengthen the design of the original lining structure of the branch tunnel.When the minimum clear distance between the expressway tunnel and the branch tunnel of water distribution engineering is 8.4m,only the support parameters of the tunnel itself need to be strengthened,and the intermediate rock mass needs to be reinforced in advance.If necessary,reinforcement measures such as prestressed long anchor rods and temporary steel arch support should be adopted for the branch tunnel.In the actual change process of the project,more emphasis is placed on considering the safety and convenience of tunnel construction.The analysis process and conclusions of this article can be used as a reference for other similar projects.

关 键 词：高速公路隧道 配水工程 近接施工 加固措施 施工安全性 

分 类 号：U45[建筑科学—桥梁与隧道工程]