浅埋偏压双孔隧道开挖顺序优化研究  

Study on optimization of excavation sequence of shallow-buried bias pressure double-hole tunnel

作　　者：李扬[1] 费维水[1] 刘文连 肖南润 LI Yang;FEI Wei-shui;LIU Wen-lian;XIAO Nan-run(Kunming University of Science and Technology,Kunming 650000,China;China Nonferrous Metals Industry Kunming Survey,Design and Research Institute Co.,Ltd.,Kunming 650000,China)

机构地区：[1]昆明理工大学,云南昆明650000 [2]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650000

出　　处：《交通科学与工程》2021年第1期82-88,共7页Journal of Transport Science and Engineering

摘　　要：为研究先行洞优先原则与CRD法开挖顺序相结合对浅埋偏压双洞隧道围岩的影响,提出合理的隧道开挖顺序。以重庆某隧道工程为依托,采用Midas/GTS软件建立了二维有限元隧道模型,分析了右洞先行且先开挖右侧、右洞先行且先开挖左侧、左洞先行且先开挖右侧、左洞先行且先开挖左侧等4种不同开挖方案的主应力分布情况。研究结果表明:采用右洞先行且先开挖左侧的开挖顺序时隧道围岩的位移和应力最小,该开挖方案最佳,以期为类似隧道施工提供借鉴。To study the influence of the first tunnel priority principle and the CRD excavation sequence on the surrounding rock of shallow-buried bias pressure double-tunnel tunnel,a reasonable tunnel excavation sequence was put forward.Based on a tunnel project in Chongqing,a two-dimensional finite element tunnel model was established by using Midas/GTS software,and the principal stress of four different excavation schemes,namely right hole with right first excavation,right hole with left first excavation,left hole with right first excavation,and left hole with left first excavation,were analyzed respectively.The results show that the excavation scheme of right hole with left first excavation minimizes the displacement and stress of surrounding rock,and the excavation scheme is the best.The results can provide references for similar tunnel construction.

关 键 词：隧道工程 浅埋偏压隧道 CRD法 数值模拟 开挖顺序 

分 类 号：U455[建筑科学—桥梁与隧道工程]