岩土复合地层双孔隧道开挖对地表沉降的影响  

Influence of Double-hole Tunnel Excavation on Ground Settlement in Geotechnical Composite Stratum

作　　者：黄戡 黄先强 杨海涛 HUANG Kan;HUANG Xianqiang;YANG Haitao(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,Hunan,China;School of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518061,Guangdong,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]深圳大学土木与交通工程学院,广东深圳518061

出　　处：《水力发电》2024年第1期15-19,61,共6页Water Power

基　　金：国家重点研发计划(2022YFC3800905);国家自然科学基金资助项目(52078060);长沙理工大学“双一流”科学研究国际合作拓展项目(2018IC19)。

摘　　要：为研究岩土复合地层中双孔平行隧道开挖对地表沉降的影响,提出一种基于复变函数理论和随机介质理论相结合的计算方法,讨论不同隧道开挖半径、隧道间距以及土层主要影响角对地表沉降的影响。结果表明,相较于不分层理论,考虑岩土分层的计算结果与有限元结果更加吻合;随着隧道开挖半径的增大,地表沉降随之增大;随着隧道间距的增大,地表最大沉降值随之减小,沉降曲线形态发生变化;随着土层主要影响角的增大,地表最大沉降值随之增大,地表沉降槽宽度变小。In order to study the influence of double-hole parallel tunnel excavation on ground settlement in geotechnical composite strata,a calculation method based on complex variable function theory and stochastic medium theory is proposed,and the influences of different tunnel excavation radius,tunnel spacing and main influence angle of soil layer on ground settlement are discussed.The results show that,(a)the calculation results considering geotechnical stratification are more consistent with the finite element results than those without stratification;(b)with the increase of tunnel excavation radius,the ground settlement increases;(c)with the increase of tunnel spacing,the maximum settlement value of ground decreases and the shape of settlement curve changes;and(d)with the increase of main influence angle of soil layer,the maximum ground settlement value increases and the width of ground settlement trough decreases.

关 键 词：地表沉降 岩土复合地层 双孔隧道 开挖 影响 复变函数理论 随机介质理论 

分 类 号：U456.31[建筑科学—桥梁与隧道工程]