[1]苏乾坤,何宁,庞玲,等.400km/h高速铁路路基地段CRTSⅢ型板式无砟轨道静力分析[J].高速铁路技术,2022,13(05):20-24.[doi:10.12098/j.issn.1674-8247.2022.05.005]
 SU Qiankun,HE Ning,PANG Ling,et al.Static Analysis of CRTS Ⅲ Slab Ballastless Track for 400 km/h High-speed Railway in Subgrade Section[J].HIGH SPEED RAILWAY TECHNOLOGY,2022,13(05):20-24.[doi:10.12098/j.issn.1674-8247.2022.05.005]
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400km/h高速铁路路基地段CRTSⅢ型板式无砟轨道静力分析()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
13卷
期数:
2022年05期
页码:
20-24
栏目:
理论探索
出版日期:
2022-10-01

文章信息/Info

Title:
Static Analysis of CRTS Ⅲ Slab Ballastless Track for 400 km/h High-speed Railway in Subgrade Section
文章编号:
1674-8247(2022)05-0020-05
作者:
苏乾坤何宁庞玲王育恒卢野
(中铁二院工程集团有限责任公司, 成都610031)
Author(s):
SU QiankunHE NingPANG LingWANG YuhengLU Ye
(China Railway Eryuan Engineering Group Co.,Ltd. , Chengdu 610031, China)
关键词:
CRTSⅢ型板式无砟轨道 静力学 适应性 变形
Keywords:
CRTS Ⅲ slab ballastless tack statics adaptability deformation
分类号:
U213.2+1
DOI:
10.12098/j.issn.1674-8247.2022.05.005
文献标志码:
A
摘要:
基于既有的CRTSⅢ型板式无砟轨道结构设计体系,针对400 km/ h 高速铁路的运营条件,本文建立路 基地段CRTSⅢ型板式无砟轨道的梁体和梁板模型,在列车荷载、温度荷载及基础变形作用下,从静力学角度 对CRTSⅢ型板式无砟轨道进行适应性分析。结果表明:(1)在列车荷载作用下,CRTSⅢ型板式无砟轨道可适 应400 km/ h 高速铁路列车动载系数的变化;(2) 在列车荷载、温度荷载及基础变形的综合作用下,负温度梯 度更不利于轨道部件的垂向变形,较大的基础沉降会引起自密实混凝土层与底座板出现脱空现象,在列车荷 载冲击作用下将使自密实混凝土层不断的拍打底座板,应严格控制不均匀沉降的幅值不超限,建议对沉降曲 线的曲率变化提出控制标准。
Abstract:
Based on the existing structural design system of CRTS Ⅲ slab ballastless track and in view of the operating conditions of 400 km/h high-speed railway, this paper establishes the beam and beam-slab models of CRTS Ⅲ slab ballastless track in subgrade section, and analyzes the adaptability of CRTS Ⅲ slab ballastless track from the perspective of statics under the action of train load ,temperature load and foundation deformation. The results show that: (1 ) CRTS Ⅲ slab ballastless track can adapt to the change of dynamic load cofficient of high-speed milway tain with a Speed of 400 km/h under the action of train load. (2) Under the combined action of train load, temperature load and foundation deformation, the negative temperature gradient is more unfavorable to the vertical deformation of track components. The larger scale of foundation settlement will cause cavity between the self-compacting concrete layer and the base plate, so that under the impact of train load, the self-compacting concrete layer will constantly beat the base plate. The amplitude of uneven settlement shall be strictly controlled not to exeed the limit. It is suggested to propose control standards for the curvature change of settlement curve.

参考文献/References:

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[4]通线
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备注/Memo

备注/Memo:
收稿日期:2022-03-01
作者简介:苏乾坤(1992-) ,男,工程师。
基金项目:中铁二院工程集团有限责任公司科技开发计划(KNSQ202259)
更新日期/Last Update: 2022-10-01