双线铁路隧道穿越不良地质段施工处理技术  

Construction Treatment Technology of Double Track Railway Tunnel Crossing Unfavorable Geological Section

作　　者：何勇华 HE Yonghua(China Railway No.2 Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二局集团有限公司,成都610031

出　　处：《路基工程》2021年第4期225-231,共7页Subgrade Engineering

摘　　要：以西南岩溶地区某双线铁路隧道出口平导和正洞穿越富水深厚块石土地层为研究对象,采用设置迂回导坑、集水廊道、正洞局部超前预注浆加固、拱部大管棚、隧底袖阀管注浆、拱墙径向注浆等方法,成功通过了该不良地质体,隧道变形沉降得到了有效控制,保证了隧道施工工期和结构安全。Taking the exit horizontal guide and main tunnel of a double track railway tunnel passing through the water-rich and deep block stone soil in karst areas of southwest China as the research object,the methods of setting detour heading,catchment gallery,local advance pre-grouting reinforcement of main tunnel,large pipe shed at arch,sleeve valve pipe grouting at tunnel bottom,radial grouting at arch wall,etc.are adopted to successfully pass the unfavorable geological body,and the tunnel deformation and settlement are effectively controlled,guaranteeing the construction period and structural safety of the tunnel.

关 键 词：铁路隧道 富水 块石土 迂回导坑 集水廊道 袖阀管注浆 

分 类 号：U459.1[建筑科学—桥梁与隧道工程]