地震波诱发的深部地层动应力机制及断裂位移研究——以汶川地震对龙门山前陆盆地的作用为例  

Study on the mechanism of dynamic stress and fault displacement in deep formations induced by seismic waves——Taking the Wenchuan earthquake on the Longmenshan foreland basin as an example

作　　者：张子平 袁青 熊齐欢 Zhang Ziping;Yuan Qing;Xiong Qihuan(CCCC Second Harbor Engineering Company LTD,Wuhan 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan 430040,China)

机构地区：[1]中交第二航务工程局有限公司,武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,武汉430040

出　　处：《地震科学进展》2021年第11期489-497,共9页Progress in Earthquake Sciences

基　　金：云南省交通运输厅科技创新示范项目(云交科教[2019]15号)资助。

摘　　要：借鉴弹性波动力学理论和爆破地震应力计算方法,结合地震波在岩层中的折射效应,以地震波加速度为基础数据,分析岩体在地震波作用下的受力。以汶川地震影响下的龙门山前陆盆地地下岩层的受力变形情况为例,通过计算分析和数值模拟,证实所用方法在求解分析地震波在各向同性岩石层间传播动力的可行性。同时验证汶川地震造成龙门山前陆盆地地下深部地层的断层破坏。With reference to elastic wave dynamics theory and blasting seismic stress calculation method,combined with the refraction effect of seismic waves in the rock layer,the seismic wave acceleration is used as the basic data to analyze the force of the rock mass under the action of seismic waves.Taking the stress and deformation of the underground strata in Longmenshan foreland basin under the influence of Wenchuan earthquake as an example,the feasibility of the method in solving and analyzing the dynamic propagation of seismic waves in isotropic rocks is verified through calculation analysis and numerical simulation.At the same time,it was verified that the Wenchuan earthquake caused fault damage to the deep underground strata in the Longmenshan foreland basin.

关 键 词：汶川地震 龙门山前陆盆地 断层构造 地震动力学 应力模型与形变 

分 类 号：P315.2[天文地球—地震学]