考虑倾滑断层上覆土层影响的地表位移概率地震危险性分析  

Probabilistic seismic hazard analysis of surface displacement under dip-slip fault dislocation considering effects of overlying soil layers

作　　者：罗文文[1,2] 聂登攀 王丽萍 程印[3] 何亚蔺 LUO Wenwen;NIE Dengpan;WANG Liping;CHENG Yin;HE Yalin(School of Civil Engineering and Architecture,Chongqing University of Science and Technology,Chongqing 401331,China;Chongqing Key Laboratory of Energy Engineering Mechanics&Disaster Prevention and Mitigation,Chongqing 401331,China;College of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Chongqing Academy of Work Safety,Chongqing 401331,China)

机构地区：[1]重庆科技学院建筑工程学院,重庆401331 [2]能源工程力学与防灾减灾重庆市重点实验室,重庆401331 [3]西南交通大学土木工程学院,四川成都610031 [4]重庆安全生产科学研究院,重庆401331

出　　处：《自然灾害学报》2023年第5期108-116,共9页Journal of Natural Disasters

基　　金：国家自然科学基金项目(51808087);重庆市自然科学基金项目(cstc2018jcyjAX0052,cstc2018jcyjAX0695);四川省科技资助计划(2021YFS0320)。

摘　　要：地铁隧道等长线性工程结构因功能需要,不可避免地跨越活动断层,一旦断层错动将可能产生严重后果。断层错动引发的地表位移可作为近地表长线性工程结构抗断设计的输入依据。其中,覆盖土层对地表位错量的影响不可忽略。鉴于此,采用有限元数值模拟方法,基于试验校准模型,研究了基岩断层错动下上覆土层厚度和土体性质等因素对地表位移的影响,提出了考虑倾滑断层上覆土层影响的地表位移概率地震危险性分析方法。研究结果可为跨断层近地表长线性工程结构抗断设计提供支撑。Due to functional requirements,long line engineering structures such as subway tunnels will cross active faults inevitably.Once the fault is dislocated,it may cause serious consequences.The surface displacement caused by fault rupture can be used as the input basis for the fracture resistance design of near-surface long-line engineering structures.Among them,the influence of the overlying soil layers on the amount of surface displacement can not be ignored.The finite element numerical simulation method based on the experimental calibration model is adopted to study the influence of factors such as the thickness of the overlying soil layers and soil properties on the surface displacement under the bedrock fault rupture,and a probabilistic seismic hazard analysis method is proposed for surface displacement considering the influence of the overlying soil layers of the dip-slip fault.The research results can provide support for the design of fracture resistance of long line engineering structures near the surface that across the fault.

关 键 词：断层错动 上覆土层 地表位移 地震危险性 抗断设计 

分 类 号：P315[天文地球—地震学]