浅埋大断面隧道黄土地层注浆预加固技术应用  

Application of Grouting Pre Reinforcement Technology in Loess Stratum of Shallow Buried Large Section Tunnel

作　　者：朱丽刚 ZHU Ligang(The Second Engineering Co.Ltd.of China Railway 18th Bureau Group,Tangshan 063030,China)

机构地区：[1]中铁十八局集团第二工程有限公司,河北唐山063030

出　　处：《新乡学院学报》2023年第12期49-53,共5页Journal of Xinxiang University

摘　　要：为解决浅埋湿陷性黄土大断面隧道在穿越富水区域施工过程中地表沉降不易控制、隧道稳定性差、不易成拱、渗水严重等问题,以国道G309线炸山嘴隧道工程项目为研究背景,采用MIDAS GTS软件分析地表垂直预注浆加固技术和防渗水技术的效果,并与施工现场沉降的监测结果进行对比。结果表明:地表垂直预注浆加固技术能有效地控制地表沉降,避免出现地表裂缝、坍陷、隧道涌水、塌方和拱顶沉降过大等病害;随着围岩自身的密实度和围岩坚硬程度增大阻水性与整体稳定性提高,地表垂直预注浆加固技术达到预期效果。In order to solve the problems of difficult control of surface settlement,poor tunnel stability,difficulty in arching,and severe water seepage during the construction process of shallow buried collapsible loess large section tunnels crossing rich water areas,the research background is the national highway G309 blast mountain mouth tunnel project.The software MIDAS GTS is used to analyze the effectiveness of surface vertical pre grouting reinforcement technology and anti seepage technology,and compare with the monitoring results of settlement on the construction site.The results indicate that the surface vertical pre grouting reinforcement technology can effectively control surface settlement and avoid diseases such as surface cracks,collapse,tunnel water gushing,collapse,and excessive arch settlement.The compactness and hardness of the surrounding rock increase,the water resistance and overall stability improving.The vertical pregrouting reinforcement technology on the surface achieves the expected effect.

关 键 词：湿陷性黄土 垂直预注浆加固 数值模拟 

分 类 号：TV554[水利工程—水利水电工程]