胶州湾第二海底隧道跨断裂带抗错方案研究  

Research on the Anti-error Scheme for the Second Submarine Tunnel of Jiaozhou Bay

作　　者：陈立保[1,2] 孙文昊 孙州[3,4] 武哲书 CHEN Libao;SUN Wenhao;SUN Zhou;WU Zheshu(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;National and Local Joint Engineering Research Center for Underwater Tunnel Technology,Wuhan 430063,China;Tongyan Civil Engineering Science and Technology Co.,Ltd.,Shanghai 200092,China;Shanghai Engineering Research Center of Underground Infrastructure Detection and Maintenance Equipment,Shanghai 200092,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]水下隧道技术国家地方联合工程研究中心,武汉430063 [3]上海同岩土木工程科技股份有限公司,上海200092 [4]上海地下基础设施安全检测与养护装备工程技术研究中心,上海200092

出　　处：《铁道标准设计》2021年第10期116-122,166,共8页Railway Standard Design

基　　金：中铁第四勘察设计院集团有限公司科研开发课题(2017K110);山东省重点研发计划(重大科技创新工程(2019JZZY010428))。

摘　　要：以胶州湾第二海底隧道工程为例,结合穿越活动断裂带的相关类似工程,通过数值模拟方法研究沧口断裂带断层错动位移对主线钻爆法隧道结构应力、变形影响规律,对比分析不同衬砌模宽、剪切缝宽度、剪切缝模量比以及柔性层厚度的抗错效果,明确了断层错动引起的隧道结构破坏范围,提出活动断裂带大错断量作用下钻爆法隧道的合理抗震设防区域及抗错措施。研究表明:(1)抗震设防区域可设置为上盘左边界4D至下盘右边界4D范围;(2)建议采用衬砌模宽6 m,剪切缝宽度0.5 m,剪切缝弹性模量50 MPa及柔性层厚度45 cm的隧道进行抗错断设计。The influence of fault displacement in the Cangkou fault zone on the stress and deformation of the main-line drilling and blasting tunnel structure is studied by numerical simulation with reference to Jiaozhou Bay Second Submarine Tunnel Project and related similar projects crossing the active fault zone.The anti-dislocation effects of different lining mold widths,shearing gap widths,shearing gap modulus ratios,and flexible layer thicknesses are analyzed.The damage scope of the tunnel structure caused by the fault dislocation is determined.Reasonable seismic fortification area and anti-error measures for drilling and blasting tunnels under the action of a large amount of fault in the active fault zone are proposed.The results show that the seismic fortification area can be set from the left boundary 4D of the hanging wall to the right boundary 4D of the footwall.It is suggested to adopt the anti-fault design of the tunnel with the width of the lining formwork of 6 m,the width of the shear joint of 0.5 m,the elastic modulus of the shear joint of 50 MPa and the thickness of the flexible layer of 45 cm.

关 键 词：海底隧道 钻爆法 错动断层 抗错设计 剪切缝宽度 设防区域 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]