断层错动作用下隧道衬砌围岩破坏机理研究  

Study on Coupled Failure Mechanism of Tunnel Structural Surrounding Rock under Fault Motion

作　　者：张向阳[1,2,3] 任尚磊[1] 许林峰 Zhang Xiangyang;Ren Shanglei;Xu Linfeng(Key Laboratory oj Coal Mine Safety and Efficiently Caving of Ministry of Education,Anhui University of Science and Technology,Huainan,Anhui 232001,P.R.China;State Key Laboratory of Coal Resources and Safe Minings China University of Mining and Technology,Xuzhou,Jiangsu 221116,P.R.China;State Key Laboratory of Mining Disaster Prevention and Control Co-Joanded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao,Slumdong 266590,P.R.China)

机构地区：[1]安徽理工大学,煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 [2]中国矿业大学,煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]山东科技大学,矿山灾害预防控制省部共建国家重点实验室,山东青岛266590

出　　处：《地下空间与工程学报》2021年第1期290-299,共10页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(52074007,51674007);安徽省自然科学基金(2008085ME142);中国矿业大学煤炭资源与安全开采国家重点实验室开放基金(SKLCRSM19KF006);山东科技大学矿山灾害预防控制省部共建国家重点实验室开放基金(MDPC201805)。

摘　　要：依托西南地区某跨断层隧道工程背景,对断层错动下隧道围岩结构影响开展相似模拟试验和数值模拟研究。综合工况及试验条件,对一般三维模型装置和光纤监测布置等进行设计,试验装置可以更好地反映断层蠕滑错动作用下衬砌围岩断层带的动态关系及衬砌结构的损伤破坏特征。结果表明,隧道结构对围岩体有一定程度的"追随性"和"抑制性",断层错动,整个模型结构内部应力重新分布,随着垂直错动量增加衬砌结构损伤破坏影响范围增大。错动影响下,衬砌结构各部分变化不一,左拱肩处破坏尤为严重,需注意拱肩处衬砌结构的塑性破坏。通过数值模拟试验对错动下跨断层隧道的影响进行进一步的研究,结果表明,围岩及衬砌结构的变形破坏趋势与相似试验相同。Based on the background of a cross-fault tunnel project in southwest China,the effect of fault dislocation on surrounding rock structure of tunnel was studied by similar simulation test and numerical simulation.Based on the engineering conditions and test conditions,the general three-dimensional model device and the fiberoptic monitoring arrangement are designed. The test device can better reflect the fault creep and slip action,dynamic relationship between lining-wall rock-fault fracture zone and damage and failure characteristics of lining structure. The results show that the tunnel structure has a certain degree of " follow-up" and " restraint" to the surrounding rock mass,fault dislocation,and stress redistribution in the whole model structure,with the increase of the vertical displacement,the damage and failure range of the lining structure increases. The influence of dislocation on the lining structure varies in different parts,and the damage at the left Spandrel is especially serious,so the plastic damage of the lining structure at the Spandrel should be noticed. The influence of cross-fault tunnel under staggered motion is further studied by numerical simulation test. The results show that the deformation and failure trend of surrounding rock and lining structure is the same as that of similar test.

关 键 词：断层错动 隧道结构 变形破坏 相似模拟 数值模拟 

分 类 号：U451[建筑科学—桥梁与隧道工程]