CRTSⅢ型板式无砟轨道自密实混凝土灌注过程应力和变形量分析及质量控制  

Stress and deformation analysis and quality control of self-compacting concrete pouringprocess for CRTS III slab ballastless track

作　　者：舒磊 王充 徐书飞 冉红玲 陈永利 曾晓辉[3] 杨兵忠 SHU Lei;WANG Chong;XU Shufei;RAN Hongling;CHEN Yongli;ZENG Xiaohui;YANG Bingzhong(China Railway No.4 Engineering Group Co.,Ltd.,Hefei 230012;Beijing Tianjin Hebei Inter-city Rail Investment Co.,Ltd.,Beijing 101520;School of Civil Engineering,Central South University,Changsha 410075)

机构地区：[1]中铁四局集团有限公司,安徽合肥230012 [2]京津冀城际铁路投资有限公司,北京101520 [3]中南大学土木工程学院,湖南长沙410075

出　　处：《中国建材科技》2023年第4期44-49,共6页China Building Materials Science & Technology

基　　金：京津冀城际铁路投资有限公司科技研究开发计划(JJJ2022A02)。

摘　　要：在高速铁路CRTSⅢ型板式无砟轨道施工中,自密实混凝土灌注易产生水击效应,导致轨道板上浮,进而对轨道标高控制产生影响。随灌注施工所用时间的减少,轨道板上浮量迅速增加,当灌注时间为2.5min时,上浮量达2.7mm,给后续扣件安装、调板等带来较大困难。本文通过ANSYS有限元分析,研究不同扩展度自密实混凝土在不同灌注速度下轨道板、底座板和扣压装置的受力状况及轨道板上浮量,以期为最佳灌注速度及灌注时间提供理论依据。In the construction of CRTS III slab ballastless track on high-speed railway,the pouring of self-compacting concrete is prone to water hammer effect,causing the track slab to float,thereby affecting the control of track elevation.As the time required for pouring construction decreases,the floating of the track slab increases rapidly.When the pouring time is 2.5 minutes,the floating of the track slab reaches 2.7mm,which causes significant difficulties for subsequent installation and adjustment.This paper uses ANSYS finite element analysis to study the stress status of track slab,base slab and clamping device,and the floating of track slab,corresponding to different expansions of self-compacting concrete at different pouring speeds,in order to provide a theoretical basis for the optimal pouring speed and pouring time.

关 键 词：CRTSⅢ型轨道板 有限元分析 自密实混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]