冰沟富水断层浅埋隧道涌水预测与堵水技术方案  

Water Inflow Prediction and Water Blocking Technology Scheme for Shallow buried Tunnel in Water-rich Fault in Ice Valley

作　　者：叶文亮 YE Weniang(Lanzhou Construction Directorate,China Railway Lanzhou Group Co.,Ltd.,Lanzhou Gansu 730000,China)

机构地区：[1]中国铁路兰州局集团有限公司兰州工程建设指挥部,甘肃兰州730000

出　　处：《中国铁路》2023年第6期25-31,共7页China Railway

摘　　要：随着我国经济的发展和基础设施建设的增多,复杂地质条件隧道工程建设逐渐增多,尤其是西部地区地形和水文地质条件复杂,往往面临着富水、浅埋、穿越断层破碎带等多种不良地质,施工期间易发生涌水、塌方等地质灾害,给隧道建设带来很大的挑战。以中兰客专香山隧道穿越冰沟富水断层浅埋段为工程背景,在地质勘探的基础上,采用经验公式和数值模拟预测隧道施工过程的最大涌水量,基于“堵水限排”的理念,对堵水方案进行研究。研究结果表明,香山隧道下穿冰沟断层浅埋段为中等富水区,需采用有效的注浆堵水方案控制涌水量;采用5m径向注浆后,隧道涌水量为0.64m^(3)/(m·d),此方案堵水效果明显;径向注浆可以有效加快施工进度,节省投资。研究结果可为隧道下穿富水断层浅埋段提供指导。With the economic growth and expansion of infrastructure construction in China,tunnels with complicated geological conditions are being built more frequently.Geological disasters like water inflow and collapse are prone to happen during construction,which presents significant difficulties for tunnel building.Taking the Xiangshan Tunnel of Zhongwei-Lanzhou Dedicated Passenger Railway as the engineering background,this paper uses empirical formula and numerical simulation to predict the maximum water inflow during tunnel construction based on geological exploration,and conducts research on the water blocking scheme based on the concept of“water blocking and controlled drainage”.The results show that the shallow-buried section is a medium water-rich area,and it is necessary to adopt an effective grouting and water blocking method to control the water inflow.After 5 m radial grouting is used,the water inflow of the tunnel is 0.64 m^(3)/(m·d),and this method has a significant effect on water blocking;radial grouting can effectively speed up the construction progress and reduce construction cost.The research results can provide guidance for the tunnel underpassing the shallow-buried section of water-rich fault.

关 键 词：穿越断层 富水 浅埋段 涌水量预测 堵水方案 径向注浆 

分 类 号：U457[建筑科学—桥梁与隧道工程]