富水山岭地区邻近补水断层隧道结构上的水头分布解析求解  

Analytical solution of head distribution on tunnel structure adjacent water-filled fault in water-enriched mountain region

作　　者：张治国[1,2,3,4] 汪嘉程[1] 赵其华 张孟喜[3] 王志伟[4] 孙良倩[5] 张俊儒 ZHANG Zhiguo;WANG Jiacheng;ZHAO Qihua;ZHANG Mengxi;WANG Zhiwei;SUN Liangqian;ZHANG Junrui(School of Emvironment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengadu,Sichuan610059,China;Department of Civil Engineering,Shanghai University,Shanghai 200444,China;State KeyLaboratory for Track Technology of High-speed Railway,China Academy of Railway Sciences,Beijing 100081,China;The 1th Engineering Co.,Ltd.of China Railway 12th Bureau Group,Xi'an,Shaanxi 710038,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [3]上海大学土木工程系,上海200444 [4]中国铁道科学研究院高速铁路轨道技术国家重点实验室,北京100081 [5]中铁十二局集团第一工程有限公司,陕西西安710038 [6]西南交通大学土木工程学院,四川成都610031

出　　处：《岩石力学与工程学报》2020年第S02期3378-3394,共17页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金项目(41772331,41977247);中国铁道科学研究院高速铁路轨道技术重点实验室基金项目(2018YJ181)。

摘　　要：山岭地区隧道经常处于高水头区域,且多断层。目前,针对高远场水头和补水断层积水水头联合作用下的深埋隧道围岩渗流场研究还较少。为了探究在地下水远场水头和补水断层水头联合作用下隧道结构上水头大小及不均匀分布影响,从而为隧道加固设计提供理论依据,基于镜像法和渗流理论得到了富水区山岭深埋圆形隧道衬砌、注浆圈和围岩等关键位置的隧道排水量和水头变化规律,同时引入了水头差参数来求解隧道结构上的水头不均匀分布规律。采用有限元数值模拟方法对相关地质工况进行数值模拟,并将数值模拟结果与理论解析结果进行对比分析,得到了较好的一致性。此外,着重分析补水断层水头大小、断层与隧道的距离、衬砌设置排水沟后的排水量以及断层倾角等参数对邻近补水断层区域隧道结构上水头分布规律的影响。主要研究结果表明:(1)隧道结构上的水头随着补水断层水头的增大而增大,但是不均匀分布减弱;(2)隧道结构上的水头和不均匀分布都随着断层与隧道中心距离的增大而减小;(3)断层倾角主要影响隧道结构上水头的不均匀分布,距隧道中心同一圆周处隧道结构上的水头最大点与最小点的连线始终与断层保持垂直。研究结果可为富水山岭地区以及存在断层等不良地质环境的隧道开挖和运营提供一定的理论依据。Tunnels in mountainous areas are often in high head areas with multiple faults.Currently,very few studies paid attention to the seepage field of deep tunnels surrounded by rocks under the combined action of high far-field head and the head of water-filled fault.To investigate the influence of the size of head and the uneven distribution under the combined action,this paper provides a theoretical basis for the tunnel reinforcement design.Based on the mirror image method and seepage theory,the tunnel drainage volume and the change law of the head at the key locations area are obtained,such as the lining,grouting circle and surrounding rock of the deep circular tunnel buried in the water-enriched area.Meanwhile,the head difference parameter is introduced to solve the uneven distribution law of the water head.The finite element numerical simulation is used to numerically simulate the geological conditions of this problem.The numerical simulation results are then checked with the results of the theoretical analysis,and good consistency is obtained.Moreover,this paper performs a sensitivity analysis on the influence of the parameters on the seepage field and the distribution law of the head such as the size of the water-filled fault head,the distance between the fault and the tunnel,the dip angle of the fault and the tunnel drainage volume after drainage ditch is set.The main findings are as follows:(1)the water head on the tunnel structure increases as the water-filled fault head enlarges,while the uneven distribution decreases;(2)the head and the uneven distribution on the tunnel structure decrease as the distance between the fault and the center of the tunnel increases;(3)the fault dip mainly affects the uneven distribution of the water head on the tunnel structure.The connection line between the point at the maximum and the point at the minimum of the water head on the tunnel structure at the same circumference from the center of the tunnel is always perpendicular to the fault.The research results can provide a the

关 键 词：隧道工程 山岭隧道 补水断层 渗流场 水头分布 镜像法 

分 类 号：U45[建筑科学—桥梁与隧道工程]