输水隧洞穿越断层破碎带TBM施工过程研究  

TBM Construction Process of Water Conveyance Tunnel Crossing Fault and Fractured Zone

作　　者：张玉婷 张程程 李悦 ZHANG Yuting;ZHANG Chengcheng;LI Yue(Yangzhou Branch of Taihu Lake Water Resources Planning and Design Institute Co.Ltd.,Yangzhou 225007,China;Jiangsu Province Engineering Investigation and Research Institute Co.Ltd.,Yangzhou 225000,China)

机构地区：[1]江苏省太湖水利规划设计研究院有限公司扬州分公司,江苏扬州225007 [2]江苏省工程勘测研究院有限责任公司,江苏扬州225000

出　　处：《海河水利》2025年第2期103-106,110,共5页Haihe Water Resources

摘　　要：输水隧洞施工过程中围岩变形影响隧洞整体稳定性,以某输水隧洞为研究对象,利用HSP217超前地质预报仪对隧道地质进行预报,进一步通过数值软件建立输水隧洞三维数值模型模拟全断面施工过程,获得施工过程中隧洞拱顶、拱腰和拱底的变形规律。通过布置不同监测断面,进一步研究破碎带存在对输水隧洞变形稳定性的影响。研究表明,桩号T50+250-T50+450段内的地震波反射界面明显,周围背景值有明显差异,结构面组数较多且杂乱无序,可判断为断层破碎带及影响带。掌子面接近破碎带过程中,隧洞变形变化较小,当掌子面穿越破碎带时,隧洞变形迅速增大;隧洞施工影响范围划分为几乎无影响区(>3D)、弱影响区(1D~3D)和强影响区(<1D);在隧洞穿越断裂破碎带时,隧洞围岩变形的空间效应会显著放大,必要时可采取加固措施。研究方法和内容可为类似工程提供指导和经验。During the construction process of a water conveyance tunnel,the deformation of the surrounding rock affects the overall stability of the tunnel.Therefore,this article takes a certain water conveyance tunnel as the research object and uses the HSP217 advanced geological prediction instrument to predict the tunnel geology.Further,numerical software was used to establish a simulation of the full section construction process of the water conveyance tunnel,and the deformation laws of the tunnel arch crown,arch waist,and arch bottom during the construction process were obtained.By arranging different monitoring sections,the influence of the presence of fractured zones on the deformation stability of water conveyance tunnels was further studied.Research has shown that the seismic wave reflection interface within the mileage T50+250—50+450 section is obvious,with significant differences in surrounding background values.The number of structural plane groups is large and disorderly,which can be determined as fault fracture zones and influence zones.During the process of approaching the fractured zone,the deformation of the tunnel is relatively small.However,when the palm passes through the fractured zone,the deformation of the tunnel increases rapidly;The impact area of tunnel construction is divided into almost no impact zone(>3D),weak impact zone(1D~3D),and strong impact zone(<1D);When the tunnel passes through a fractured zone,the spatial effect of tunnel surrounding rock deformation will be significantly amplified,and necessary reinforcement measures can be taken if necessary.The research methods and content of this article can provide guidance and experience for similar projects.

关 键 词：破碎带 输水隧洞 有限元分析 隧洞变形 

分 类 号：TV523[水利工程—水利水电工程] TV672.1