城际铁路地下车站公共区域大跨无柱结构设计  

Design and Research of Large-span Structure without Column for the Public Area of Intercity Railway Station

作　　者：蒙蛟 MENG Jiao(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《铁道勘察》2023年第5期132-137,共6页Railway Investigation and Surveying

基　　金：中国铁路设计集团有限公司科技开发项目重点课题(2021CJ0112)。

摘　　要：在粤港澳大湾区南沙至珠海(中山)城际铁路岐江新城站建设过程中,为满足公共区站台门退台距离和站台层布置需要,优化车站规模和空间视觉效果,需采用无柱设计。目前城际铁路地下结构中采用无柱概念的工程经验不足,而地下三层岐江新城站层板跨度达22.9 m,存在构件受力、断面选型、抗浮等重难点问题。运用数值模拟方法,通过对底板抗拔桩设置和顶板结构形式的受力结果进行比较,对各种工况下的设计方案展开分析,研究表明:底板设双排抗拔桩后,跨中和支座处弯矩分别减小67.5%和69.4%,相较于底板设置双排抗拔桩的方案,弯矩仅增加4.2%,其施工难度和经济性更具有优势;在顶板起拱的断面型式中,顶板跨中弯矩降低63.85%,支座弯矩降低51%,可明显改善结构受力。During the construction of the Nansha-Zhuhai-Zhongshan Intercity Railway in the Greater Bay Area,in order to meet the requirements including platform yield distance,platform floor layout in the public area of the Qijiangxincheng station,and optimize the station scale and spatial visual effect,the public area was designed without columns.At present,the engineering experience of adopting the concept of no column in the underground structure of intercity railway is insufficient.The span of the station on the third underground floor is 22.9 m,which leads to questions including component stress design,section selection,anti-floating design,etc.Based on the scheme design of the project,this paper used the numerical simulation method to analyze the design scheme under various working conditions by comparing the stress results of the bottom uplift pile setting and the roof structure.The results show that:The bending moment at the midspan and bearing decreases by 67.5%and 69.4%respectively after the bottom plate is set with double rows of uplift piles.The bending moment of the bottom plate only increases 4.2%,and the scheme has more advantages in terms of construction and economy.In the section type of roof camber,the bending moment of roof midspan can be reduced by 63.85%,and the bending moment of support can be reduced by 51%,which can significantly improve the structural stress.

关 键 词：城际铁路 地下车站 数值模拟 无柱车站结构 断面型式 

分 类 号：U291[交通运输工程—交通运输规划与管理] TU312[交通运输工程—道路与铁道工程]