康西瓦断裂错动对近断层隧道影响的数值模拟分析  

Numerical simulation analysis of the influence of Karakax fault dislocation on near-fault tunnel

作　　者：王杰 盛俭 赵梦丹 王欣宇 WANG Jie;SHENG Jian;ZHAO Mengdan;WANG Xinyu(College of Transportation Science&Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学交通运输工程学院,江苏南京210009

出　　处：《地震工程与工程振动》2022年第3期235-242,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家重点研发计划专题(2017YFC1500405);河北省地震灾害防御与风险评价重点实验室开放基金项目(FZ213105)。

摘　　要：断层错动会对近断层隧道工程造成破坏。为研究逆断层错动对近断层隧道结构产生的影响,以新疆地区拟建隧道的地质背景为依托,利用ABAQUS有限元软件,建立与逆断层走向平行的隧道结构的力学模型。针对隧道与断层破碎带的不同间距、不同断层位错量下的隧道结构反应规律和变形特征进行对比分析。研究结果表明:逆断层错动引起的隧道衬砌结构变形均发生在靠近断层破碎带一侧,随着隧道结构与断层破碎带间距的不断增大,隧道结构受到逆断层错动影响产生的竖向位移和损伤值均不断减小;随着断层位错量的增加产生的竖向位移和损伤值均增大;且受压损伤值始终大于受拉损伤值。断层错动作用下隧道结构产生损伤破坏的临界位错量为0.8 m,隧道与断层破碎带间距的临界值为30 m。Fault dislocation will cause damage to the near-fault tunnel project.In order to study the deformation mechanism of reverse fault dislocation on the near-fault tunnel.Based on the geological background of the proposed tunnel in Xinjiang,the mechanical model of the tunnel structure parallel to the reverse fault is established by ABAQUS finite element software.The response mechanism of tunnel structure under different spacing between tunnel and fault fracture zone,and different fault dislocation are compared and analyzed.The results show that the deformation of the tunnel lining caused by the reverse fault dislocation occurs on the side of the fault fracture zone.With the increase of the distance between the tunnel structure and the fault fracture zone,both the vertical displacement and damage value of the tunnel structure affected by the reverse fault dislocation are decreasing.The vertical displacement and damage values increase with the increase of fault dislocation.And the compression damage value is always greater than the tensile damage value.The critical dislocation is 0.8 m and the critical distance between tunnel and fault fracture zone is 30 m.

关 键 词：断层错动 隧道 距离 数值模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]