高速铁路Ⅱ型板路桥过渡段底座劣化整治技术研究  

Research on Deterioration Remediation Technology of the Transition Section Base of the High-speed Railway Type Ⅱ Slab Road Bridge

作　　者：赵虎[1] 杨怀志 代冲 谭诗宇 洪剑 ZHAO Hu;YANG Huaizhi;DAI Chong;TAN Shiyu;HONG Jian(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Beijing-Shanghai High Speed Railway Co.Ltd.,Beijing 100038,China;China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan 430063,China;China Railway Shanghai Group Co.Ltd.,Shanghai 200071,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]京沪高速铁路股份有限公司,北京100038 [3]中铁第四勘察设计院集团有限公司,湖北武汉430063 [4]中国铁路上海局集团有限公司,上海200071

出　　处：《石家庄铁道大学学报(自然科学版)》2025年第1期59-63,共5页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：京沪高铁重大课题(2022-20)。

摘　　要：CRTSⅡ型板式无砟轨道在中国高速铁路应用较多,为解决该型轨道在路桥过渡段端刺区底座板混凝土劣化的问题,建立了路桥过渡段端刺区段有限元仿真模型,计算得到由混凝土劣化导致混凝土强度等级从C30下降到C15时,轨道结构应力增大约9%;底座板受力截面减小30%时,轨道结构应力增大约9%。研究了对底座板外露部分进行局部凿除重筑的技术方案可行性,并通过分布式混凝土应变监测技术对目标病害区段进行长期监测。结果表明,局部凿除重筑后病害区段整体结构稳定,混凝土应力变化可控,对运营条件下该类问题的解决有一定指导意义。The CRTSⅡ slab ballastless track is widely used in high-speed railways in China.To solve the problem of concrete deterioration in the base plate of the track at the transition section between bridge and roadbed,a finite element simulation model of the transition section was established.It was calculated that when the concrete strength grade decreased from C30 to C15 due to concrete degradation,the stress in the track structure increased by about 9%;When the stress cross-section of the base plate decreases by 30%,the stress of the track structure increases by about 9%.The feasibility of a technical solution for locally chiseling and rebuilding the exposed part of the base plate was studied,and long-term monitoring of the target disease section was carried out through distributed concrete strain monitoring technology.The results indicate that the overall structure of the damaged section is stable after local chiseling and reconstruction,and the stress changes in the concrete are controllable,which has certain guiding significance for solving such problems under operating conditions.

关 键 词：高速铁路 路桥过渡段 混凝土劣化 修复 监测 

分 类 号：TU216[建筑科学—建筑设计及理论]