地震作用下层状土中地铁车站变形规律研究  

Study on the Deformation of Subway station in Layered Soil under earthquake

作　　者：潘东旭[1] 陶连金[1] 刘璐[1] 张波[2] 王文沛[3] 

机构地区：[1]北京工业大学,岩土与地下工程研究所,北京100124 [2]北京城建勘测设计研究院有限责任公司,北京100101 [3]中国地质环境监测院,北京100081

出　　处：《地下空间与工程学报》2013年第3期552-557,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金项目(No.41272337,No.51038009);北京市自然科学基金重点项目(No.8111001)

摘　　要：采用FLAC有限差分软件,通过简化模型和土层,在输入唐山地震-北京旅馆测点南北向地震动时程情况下,研究了层状土中地铁车站变形规律;同时,将变形计算结果输入到地下结构的SAP模型,计算了结构的内力。以北京地铁16号线某车站为例,进行了地震响应数值模拟分析,研究表明:均匀土层中结构侧墙变形大于双层(上软下硬)土中侧墙变形;且不同土层中结构侧墙变形曲线斜率明显不同;存在软硬土层交界面时,结构侧墙位移随交界面深度呈线性增加;软硬土层交界面位于结构底板以下,即当车站结构处于同一种地层时,结构侧墙位移随着距离软硬交界面距离的增加而减小。By using finite difference numerical analysis software FLAC, by simplifying the model and soil infor- mation, to input the Tangshan earthquake-Beijing hotel measuring point at north-south direction earthquake in dynam- ic time course the deformation of the subway station in layered soil is studied ; simultaneously, the deformation calcula- tion results are put into the SAP model to calculate the structural internal force. Taking a station of Beijing subway line 16 for example, the numerical simulations analysis of earthquake response was carried out. Studies show that the structure side wall deformation in homogeneous soil is obviously greater than that in double soil, and the sidewall de- formation curve slope is significantly different in different soil layers. The structure sidewall displacement increases linearly with the interface depth when the hard and soft soil interface moves from roof to the floor. Hard and soft soil interface is located below the floor that is the station structure in the same soil layer, structure sidewall displacement is reduced with the increase of the distance from the hard and soft interface.

关 键 词：地铁车站 数值模拟 地震响应 层状土 软硬界面 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]