复合墙式地铁站结构力学性能影响因素分析  

Analysis on influencing factors of structural mechanical properties of composite wall subway station

作　　者：闫腾飞 陈保国[2] 马昆泉 张建锁 YAN Tengfei;CHEN Baoguo;MA Kunquan;ZHANG Jiansuo(China State Construction Civil Engineering Construction Co.,Ltd.,Beijing 100070,China;Faculty of Engineering,China University of Geosciences,Wuhan 430014,Hubei.China;School of Highway,Chang’an University,Xi'an 710064,Shaanxi,China)

机构地区：[1]中国建筑土木建设有限公司,北京100070 [2]中国地质大学(武汉)工程学院,湖北武汉430074 [3]长安大学公路学院,陕西西安710064

出　　处：《工程建设》2022年第3期1-6,26,共7页Engineering Construction

基　　金：国家自然科学基金资助项目(51108434)。

摘　　要：复合墙结构体系是车站结构体系型式的重要组成部分之一。复合墙式地铁车站结构体系受力特性具有显著的不确知性,柔性夹层性质及围护结构相关参数对其有直接影响。鉴于此,本文采用数值模拟方法研究了柔性夹层厚度、弹性模量、地连墙刚度、嵌入深度等因素对复合墙体系受力特性的影响,得出墙后水平土压力、地连墙水平位移、车站侧墙水平位移、结构体系内力等变化规律。结果表明:(1)地连墙水平位移及嵌入段墙后水平土压力随柔性夹层厚度增加而增大,随柔性夹层弹性模量减小而增大,随地连墙刚度增加而减小;(2)墙后水平土压力、车站侧墙水平位移、车站结构弯矩随柔性夹层厚度增加而减小,随柔性夹层弹性模量减小而减小,随地连墙刚度增加而减小;(3)地连墙嵌入深度对墙背土压力减载效果影响不显著。Composite wall structure system is one of the important components of station structure system.The force characteristics of subway station structure system of composite wall have significant uncertainty,and the nature of flexible band and relevant parameters of envelope structure have direct influence on it.In view of this,numerical simulation method is adopted to study the influence of the thickness of flexible band,elastic modulus,ground link wall stiffness,embedment depth and other factors on the force characteristics of the composite wall system,while such change laws as horizontal earth pressure behind the wall,horizontal displacement of ground link wall,horizontal displacement of station side wall and internal force of structural system are derived.The results show that:(1)the horizontal displacement of the ground link wall and the horizontal earth pressure behind the embedded section increase with the increase of the thickness of the flexible band,increase with the decrease of the elastic modulus of the flexible band,and decrease with the increase of the stiffness of the ground link wall;(2)the horizontal earth pressure behind the wall,the horizontal displacement of the station side wall,and the bending moment of the station structure decrease with the increase of the thickness of the flexible band,decrease with the decrease of the elastic modulus of the flexible band,and decrease with the increase of the stiffness of the ground link wall;(3)the effect of embedment depth of ground-linked wall on the effect of load reduction of earth pressure behind the wall is not significant.

关 键 词：复合墙 土压力 结构内力 柔性夹层 影响因素 数值模拟 

分 类 号：TU753[建筑科学—建筑技术科学]