隧道漏水诱发的地层水位降深计算方法与工程应用  

Calculation Method and Engineering Application of Drawdown Induced by Tunnel Water Leakage

作　　者：郑邦友 刘济遥 雷明锋[2,3] 卢智强 吴治刚 彭成 ZHENG Bangyou;LIU Jiyao;LEI Mingfeng;LU Zhiqiang;WU Zhigang;PENG Cheng(China Construction Tunnel Corp.,Ltd.,Chongqing 401320;School of Civil Engineering,Central South University,Changsha 410075;MOE Key Laboratory of Engineering Structures of Heavy Haul Railway,Changsha 410075)

机构地区：[1]中建隧道建设有限公司,重庆401320 [2]中南大学土木工程学院,长沙410075 [3]重载铁路工程结构教育部重点实验室,长沙410075

出　　处：《现代隧道技术》2020年第6期86-92,共7页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(51978669,U1934211);中建股份科技研发计划项目(CSCEC-2017-Z-24);中建五局科技研发计划项目(cscec5b-2017-01).

摘　　要：隧道大量漏、涌水将造成周边地层水位下降,进而诱发大面积地层沉陷,危及周边建(构)筑物、管线的运行安全。文章基于面井法,考虑大气降水补给影响,建立了隧道漏水诱发的周边地层水位降深计算方法,并进行了实例应用与分析。结果表明:(1)隧道漏水诱发的周边地层水位降深曲线呈对称"沉降槽"形,越靠近隧道中心处,水位降深越明显;(2)随漏水持续时间的延长,水位降深呈对数函数发展趋势;(3)依托工程隧道连续漏水30 d,周边50 m范围内地层水位下降将超过3 m,实际施工过程中应及时采取堵水措施。Large amounts of water leakage and water inflow in tunnel will cause the drop of water level of the surrounding strata and induce a large area of strata subsidence,threatening the safety of constructions(structures)and pipelines in the surrounding area.Considering the influence of atmospheric precipitation recharge,a calculation method for drawdown in surrounding strata induced by tunnel water leakage is established based on areal well theory,and practical application and analysis are conducted.The results show:(1)the drawdown curve of surrounding strata induced by tunnel water leakage is in a shape of symmetrical"subsidence trough",the closer to the tunnel center the more significant the drawdown;(2)the drawdown develops in a trend of log function with continuous water leakage;(3)for the studied project,water blocking measures should be taken in light of the drawdown more than 3 m in a scope of 50 m nearby after continuous water leakage of 30 d.

关 键 词：隧道 漏水 水位降深 降水补给 计算方法 

分 类 号：U452[建筑科学—桥梁与隧道工程] U457.2[交通运输工程—道路与铁道工程]