秦岭隧洞富水节理密集带处置方案研究及实践  

Research and Application of Qinling Tunnel Construction Measures with External Water Pressure in Concentrated Joint Area and Water Rich Zone

作　　者：魏军政[1] WEI Junzheng(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi＇an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《人民黄河》2018年第12期122-126,共5页Yellow River

基　　金：陕西省引汉济渭工程建设有限公司科研项目(引汉建函[2014]93号)

摘　　要：地下工程中,常规外水压力的应对措施已经具有大量的工程实践和理论研究,但特殊区段的研究较少。结合引汉济渭秦岭隧洞越岭段的工程实践,针对大埋深、围岩相对较好、富水、空腔发育的节理密集带的特殊段落,研究外水压处理方案。通过数值计算、现场实施条件、实施效果等分析论证,提出推荐方案。密集带外侧采用土工布填塞并注化学浆液速凝形成外模,内侧刻槽扩挖浇筑钢筋混凝土形成内模后,灌注双液浆,达到堵水抗水压的效果。经现场组织实施,效果较好。In underground engineering, there have been lots of conventional engineering practices and theoretical researches on tunnel exter-nal water pressure. But studies are few in special geological conditions. Thus this paper aimed at engineering measures for external water pres-sure in concentrated joint area conditions with large depth, relatively good surrounding rock, rich water and developed cavity combining withthe practices of Qinling tunnel of Hanjiang-to-Weihe River Valley Water Diversion Project. Through numerical calculation method, in-situcondition and case analysis, a series of measures were proposed. Geotextile was used to fill the outer side of the grouting zone and chemicalgrout was injected to form the outer mould. After that, the inner mould closely contacted to the surrounding rock was made by reinforced con-crete. Then the cement-sodium silicate binary slurry was injected to clog waterguiding crack and to resist water pressure. The construction ofthe Qinling tunnel showed a satisfying result.

关 键 词：秦岭隧洞 富水 节理密集带 处理 

分 类 号：TV672.1[水利工程—水利水电工程]