直线与曲线地段无砟轨道SCC灌注对比分析  

Comparative Analysis on SCC Pouring of Ballastless Track in Straight and Curved Sections

作　　者：查本怡[1] 孙洪斌 张浩楠 姜金凤 赵光 王晓宇 ZHA Benyi;SUN Hongbin;ZHANG Haonan;JIANG Jinfeng;ZHAO Guang;WANG Xiaoyu(China Railway Major Bridge Engineering Group No.2 Engineering Co.,Ltd.,Nanjing Jiangsu 210015,China;Shandong Railway Investment Holding Group Co.,Ltd.,Jinan Shandong 250102,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Qingdao Branch of China Railway No.10 Engineering Group Co.,Ltd.,Qingdao Shandong 266000,China;The 8th Engineering Co.,Ltd.of China Railway No.4 Engineering Group Co.,Ltd.,Hefei Anhui 230009,China)

机构地区：[1]中铁大桥局集团第二工程有限公司,江苏南京210015 [2]山东铁路投资控股集团有限公司,山东济南250102 [3]北京交通大学土木建筑工程学院,北京100044 [4]中铁十局集团有限公司青岛分公司,山东青岛266000 [5]中铁四局集团有限公司第八工程分公司,安徽合肥230009

出　　处：《中国铁路》2024年第9期100-109,共10页China Railway

基　　金：国家自然科学基金资质项目(52378214);山东省交通运输厅科技计划项目(2021B100-1)。

摘　　要：针对自密实混凝土(Self-Compacting Concrete,SCC)灌注中出现的轨道板上浮、扣压装置受力过大的问题,基于耦合的欧拉-拉格朗日(Coupled Eulerian-Lagrangian,CEL)方法,分别建立直线与曲线地段CRTSⅢ型板式无砟轨道SCC灌注的流固耦合模型,从理论上对比分析直线与曲线地段SCC灌注的轨道板和扣压装置力学特性。研究结果表明:轨道板上浮力、轨道板最大垂向及横向位移、拉杆轴向力均随着漏斗高度或漏斗数量的增大而增大,曲线地段的轨道板上浮力、轨道板最大垂向位移、拉杆力随漏斗高度变化更显著。单孔灌注时,曲线地段轨道板上浮力、轨道板最大垂向位移、拉杆轴向力均小于直线地段;双孔灌注时,则大于直线地段。曲线地段轨道板最大横向位移显著大于直线地段,其主要原因为曲线地段的轨道板上浮力的水平分量对轨道板在横向产生推动作用。曲线地段的内侧拉杆轴向力显著大于外侧。In view of the problems of floating of track slab and excessive stress on fastening device during self-compacting concrete(SCC)pouring,based on the Coupled Eulerian-Lagrangian(CEL)method,this paper establishes fluid-solid coupling models for SCC pouring of CRTS III slab ballastless track in straight and curved sections respectively,and compares and analyzes the mechanical characteristics of track slab and fastening device during SCC pouring in straight and curved sections theoretically.The study results indicate that the floating force of track slab,the maximum vertical and lateral displacements of track slab and the axial force of toggle arm increase with the increase of hopper height or the number of hoppers.The floating force of track slab,the maximum vertical displacement of track slab and the axial force of toggle arm in curved section change more significantly with the increase of hopper height.During single-hole grouting,the floating force of track slab,the maximum vertical displacement of track slab and the axial force of toggle arm in curved section are less than those in straight section;during double-hole grouting,they are greater than those in straight section.The maximum lateral displacement of track slab in curved section is significantly greater than that in straight section.This is mainly because the horizontal component of the floating force of track slab in curved section exerts a pushing effect on the track slab in the lateral direction.The axial force of inner toggle arm in curved section is significantly greater than that of outer toggle arm.

关 键 词：无砟轨道 自密实混凝土 曲线地段 CEL方法 轨道板 扣压装置 

分 类 号：U213.2[交通运输工程—道路与铁道工程]