偏压浅埋大跨径隧道铣挖法施工技术  

Construction Technology with Boom Type Heading Applied to Unsymmetrical Pressure Shallow Depth and Large Span Tunnel

作　　者：邱伟 张国帅 徐鹏前 范坤 李新 马广珍 QIU Wei;ZHANG Guoshuai;XU Pengqian;FAN Kun;LI Xin;MA Guangzhen(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Zhengzhou Jinda Construction and Development Company Limited,Zhengzhou 450000,China;2nd Engineering Company Limited,China Railway 14 th Bureau Group,Tai’an 271000,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]郑州金达建设发展有限公司,河南郑州450000 [3]中铁十四局集团第二工程有限公司,山东泰安271000

出　　处：《建井技术》2021年第6期16-20,48,共6页Mine Construction Technology

摘　　要：以广东省汕尾市深汕特别合作区科教大道(南山路—望鹏大道段)莲花隧道为工程背景,综合考虑现场施工实际情况,阐述了偏压、浅埋、超大跨径隧道冷挖掘进施工技术的优化及现场应用情况。基于对莲花隧道超前地质预报、监测结果,在施工过程中,采用了不同类型铣挖机;并在施工过程中,监测隧道围岩总体变形及地表沉降等指标变化,避免了超、欠挖等问题。基于上述途径,有效解决了进洞困难、土体失稳、围岩扰动大等难题,顺利完成了偏压、浅埋、超大跨径隧道洞口掘进施工,对类似工程施工具有借鉴意义。Based on Lianhua Tunnel of Kejiao Highway in Shenshan Special Cooperation District of Shanwei City,Guangdong Province as the engineering background,in consideration on the actual condition of the site construction,the paper stated the optimization and the site application condition of the cold excavation construction technology in the unsymmetrical pressure,shallow depth and ultra large span tunnel.Based on the advanced geological forecast and monitoring results of Lianhua Tunnel,during the construction process,different boom type roadheaders were applied.Meanwhile,during the construction process,the total deformation of the surrounding rock along the tunnel and the surface ground settlement as well as other index variation were monitored in order to avoid the over breaking and under breaking as well as other problem.Based on the above approach,the difficult into tunnel,soil unstability,high surrounding rock turbulence and other problems were successfully solved.The entrance excavation construction of the unsymmetrical pressure,shallow depth and high span tunnel was successfully completed and would have the references to the similar projects.

关 键 词：大跨径隧道 偏压 浅埋 铣挖法 变形监测 

分 类 号：U455.44[建筑科学—桥梁与隧道工程]