不同转向角度曲线隧道穿越走滑断层力学行为  

Mechanical behavior of curved tunnels with different steering angles passing through strike-slip fault

作　　者：罗庆斐 袁松 袁飞云 周道良 王峥峥[1] LUO Qingfei;YUAN Song;YUAN Feiyun;ZHOU Daoliang;WANG Zhengzheng(Department of Civil Engineering,Dalian University of Technology,Dalian 116024,China;Sichuan Communication Surveying&Design Institute Co.,LTD,Chengdu 610017,China;Sichuan Yakang Expressway Co.,LTD,Ya′an 625000,China)

机构地区：[1]大连理工大学土木工程系,辽宁大连116024 [2]四川省交通勘察设计研究院有限公司,四川成都610017 [3]四川雅康高速公路有限责任公司,四川雅安625000

出　　处：《大连理工大学学报》2025年第2期171-180,共10页Journal of Dalian University of Technology

基　　金：四川省交通科技项目(2019-ZL-12)。

摘　　要：针对不同转向角度曲线隧道穿越走滑断层力学行为不清等问题,以跑马山1号隧道为研究背景,采用ABAQUS软件建立不同转向角度曲线隧道穿越走滑断层的数值模型,研究曲线隧道穿越走滑断层的力学行为,并引入损伤指标对其破坏程度进行评价.结果表明:在走滑断层作用下,曲线隧道的变形、剪力、轴力以及弯矩分布趋势根据转向角度是否大于90°分为两类:当转向角度小于90°时,曲线隧道的剪力、轴力分布趋势与直线隧道相类似;当转向角度大于90°时,曲线隧道的轴力峰值处于45°~70°.曲线隧道受压损伤主要集中在断层附近,同时随着转向角度增大,其受压损伤程度也增大,并且其左右两侧也会有明显的差距;转向角度180°的曲线隧道为最危险工况,并且随着转向角度增大,隧道进出口附近的损伤状态也会变严重.In view of the unclear mechanical behavior of curved tunnels with different steering angles passing through strike-slip faults,taking the No.1 tunnel of Paomashan as the research background,the numerical model of curved tunnels with different steering angles passing through strike-slip faults is established by ABAQUS software,the mechanical behavior of curved tunnels passing through strike-slip faults is studied,and the damage index is introduced to evaluate the damage degree.The results show that under the action of strike-slip fault,the deformation,shear force,axial force and bending moment distribution trends of curved tunnel can be divided into two types according to whether the steering angle is greater than 90°:when the steering angle is less than 90°,the distribution trend of shear force and axial force of curved tunnel is similar to that of linear tunnel;while the steering angle is greater than 90°,the peak value of axial force of curved tunnel exists between 45°and 70°.The compression damage of curved tunnel is mainly concentrated near the fault,and the degree of compression damage increases with the increase of the steering angle,and there will be an obvious gap between the left and right sides of the curved tunnel;the curved tunnel with a steering angle of 180°is the most dangerous situation,and with the increase of the steering angle,the damage state near the tunnel entrance and exit will be more serious.

关 键 词：曲线隧道 转向角度 走滑断层 力学行为 损伤指标 

分 类 号：U45[建筑科学—桥梁与隧道工程]