正断层错动下的输水隧洞动力响应分析

Dynamic Response Analysis of Water Conveyance Tunnel Under Normal Fault Dislocation

长距离调水工程中的输水隧洞通过潜在地震地区时,存在活动断层错动引发的重大工程安全隐患,揭示断层错动对输水隧洞稳定性影响的研究具有非常重要的工程意义。基于围岩、断层破裂带、衬砌和内水的动力相互作用特征,使用ABAQUS有限元分析软件,建立了围岩-断层破裂带-衬砌-内水三维数值模型,深入分析了各种断层错动量、宽度及粘聚力对输水隧洞稳定性的影响。结果表明,处于较小断层错动量、断层宽度及较大断层粘聚力情况下的输水隧洞衬砌结构竖向位移及损伤程度有所减小,结果对跨断层输水隧洞动力响应理论研究有一定的参考价值。

When the water conveyance tunnel in long-distance water diversion project passes through the potential earthquake area,there is a major engineering safety hazard caused by active fault dislocation.It is of great engineering significance to reveal the influence of fault dislocation on the stability of water conveyance tunnel.Based on ABAQUS nite fi-element analysis software,considering the complex dynamic interaction characteristics of surrounding rock,fault,lining and internal water,the three-dimensional numerical simulation of surrounding rock-fault fracture nal zone-lining-inter-water system was carried out,and the influence of different fault dislocation momentum,width and cohesion on the stability of water conveyance tunnel was analyzed in depth.The results show that the vertical displacement and damage degree of the lining structure of the water conveyance tunnel decrease under the conditions of small fault dislocation,fault width and large fault cohesion,which has a certain reference value for the theoretical study of the dynamic response of the water conveyance tunnel across faults.