地铁运行诱发振动对车辆段上盖开发结构的影响  

Study on Vibration Effects Induced by Subway Train on Structures of Subway Depot Cover Development

作　　者：李晓霖[1,2] 陶连金[1] 张丁盛 

机构地区：[1]北京工业大学建筑工程学院,北京100022 [2]北京城建设计发展集团股份有限公司,北京100037

出　　处：《都市快轨交通》2014年第3期13-17,共5页Urban Rapid Rail Transit

摘　　要：以北京地铁四惠车辆段上盖大平台及其上方的住宅楼为研究对象,根据地质勘察及设计等资料,以地铁列车动荷载时程作为模型输入,建立FLAC二维动力数值分析模型,并进行动力学分析,得到地铁列车运行产生的振动对车辆段上盖及开发建筑的影响规律:在地铁列车通过时,车辆段上盖开发大平台两层板的水平振动强度第一层比第二层大,而两层板竖直方向振动强度几乎一致;随着与地铁线路距离的增加,各幢楼房的水平振动强度在不同楼层的分布规律并不一致,其中位于地铁线路上方楼房的水平振动强度在底层和顶层都较大、中间层较小;每幢楼各层的竖直方向振动加速度几乎一致;对于各幢楼房而言,振动强度竖直方向较水平方向更为显著。The cover platform with storied buildings on it of Sihui vehicle depot of Beijing subway is studied in this article. Based on geotechnieal and design data, with the input of a dynamic load history of subway train, a 2D dynamic numerical model is built and analyzed with FLAC （Fast Lagrangian Analysis of Continua）. The influences of vibration responses of the cover platform and the storied buildings are obtained. The horizontal vibration intensity of the first layer of the two-layer boards of depot cover development platform is larger than the second one when train passes, and the vertical direction vibration intensity of two-layer boards is almost identical. With the increase of subway lines＇ distance, the horizontal vibration intensity distribution in different floors is not consist- ent. The horizontal vibration intensity in the bottom and top are larger than that of the middle layer. The vertical vibration of each lay- er is almost identical. For all buildings, intensity of vertical vibration is more intense than that of horizontal vibration. The conclusions can provide references for vibrating evaluation of subway depot development, for vibration control of subgrade of subway and the cover platform of subway depot with development buildings.

关 键 词：地铁 振动 有限差分 动力学分析 

分 类 号：U211.3[交通运输工程—道路与铁道工程]