不同类型断层错动下半圆形曲线隧道力学行为  

Research on Mechanical Behavior of Semicircular Curved Tunnel under Different Types of Fault Dislocation

作　　者：袁松 王希宝 袁飞云 罗庆斐 肖锋 王峥峥[3] YUAN Song;WANG Xi-bao;YUAN Fei-yun;LUO Qing-fei;XIAO Feng;WANG Zheng-zheng(Sichuan Communication Surveying&Design Institute Co.Ltd.,Chengdu 610017,China;Sichuan Yakang Expressway Co.Ltd.,Ya'an 625000,China;School of Civil Engineering,Dalian University of Technology,Dalian 116024,China)

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

出　　处：《公路》2024年第12期440-449,共10页Highway

基　　金：四川省交通科技项目,项目编号2019-ZL-12。

摘　　要：针对半圆形曲线隧道在断层错动作用下受力状态不清的问题,以跑马山2号隧道工程为依托,通过ABAQUS软件建立半圆形曲线隧道穿越正断层、逆断层以及走滑断层的数值模型,并引入隧道OLDT损伤等级,研究半圆形曲线隧道在不同断层作用下的力学行为。结果表明:由于走滑断层的错动方向位于隧道所处平面,因此其相对变形、轴力、剪力以及损伤程度均要大于正、逆断层,并且在隧道进出口位置其受拉损伤程度尤为严重,同时在走滑断层作用下,半圆形曲线隧道在断层附近还会发生一定的扭转;而半圆形曲线隧道在正、逆断层作用下,其相对变形、内力以及损伤范围主要集中在断层附近,与直线隧道相类似。因此,在后续类似工程设计中,需要对上述位置采取适当的措施。In view of the unclear mechanical mechanism of semicircular curved tunnel under the action of fault dislocation,taking the Paomashan No.2 Tunnel as the background,the numerical model of semicircular curved tunnel passing through normal fault,reverse fault and strike-slip fault is established by ABAQUS software,and the tunnel OLDT damage grade is introduced to study the mechanical behavior of semicircular curved tunnel under the action of different faults.The results show that because the dislocation direction of the strike-slip fault is located in the plane of the tunnel,the relative deformation,axial force,shear force and damage degree of the strike-slip fault are greater than that of the normal and reverse fault,and the tensile damage is especially severe at the entrance and exit of the tunnel.At the same time,under the action of the strike-slip fault,the semicircular curved tunnel will have a certain torsion near the fault.Under the action of positive and reverse faults,the relative deformation,internal force and damage degree of semicircular curved tunnel are mainly concentrated near the fault,which is similar to that of linear tunnel.Therefore,in the follow-up similar engineering design,appropriate measures need to be taken for the above positions.

关 键 词：半圆形曲线隧道 正断层 逆断层 走滑断层 力学行为 

分 类 号：U452.27[建筑科学—桥梁与隧道工程]