路基工程Issue(2)：138-142,5.DOI:10.13379/j.issn.1003-8825.202304043
双块式无砟轨道端梁区高温拱曲影响因素及控制技术
Influence Factors and Control Technology of High Temperature Arching in End Beam Area of Twin-block Slab Ballastless Track
摘要
Abstract
Aimming at the problem of the upward arching of the track slab near the end beam area on the two ends of the subgrade section of the line twin-block slab ballastless track of the high-speed railway,the finite element method was used to study the influence law of different temperature combinations,subgrade section lengths,and end beam pile-soil constraint stiffness.The results show that the temperature deformation of the track slab is the main cause of the upward arching,but the deformation disturbance of the support layer and its combined effect with the temperature deformation of the track slab cannot be ignored.As the length of the subgrade section increases,the amplitude of the upward arching increases significantly.The influence of pile-soil constraints on the upward arching of the end beam is relatively complex.The upward arching reaches its peak at a specific constraint stiffness in the middle space,meanwhile the constraint stiffness increases or decreases,the upward arching shows a decreasing trend.The effect of disconnecting the support layer on controlling the deformation of high-temperature upward arching is not significant.Breaking the track slab has a significant effect,but it is necessary to consider the rail forces in the corresponding sections.关键词
高速铁路/双块式无砟轨道/过渡段/温度/变形控制/约束刚度Key words
high-speed railway/twin-block slab ballastless track/transition section/temperature/deformation control/constraint stiffness分类
交通工程引用本文复制引用
赵虎,杨怀志,代冲,谭诗宇,洪剑..双块式无砟轨道端梁区高温拱曲影响因素及控制技术[J].路基工程,2024,(2):138-142,5.基金项目
京沪高速铁路股份有限公司科研项目:纵连板式无砟轨道Ⅱ型刺服端服役状态健康监测与稳定性控制技术研究(2020-13) （2020-13）
京沪高速铁路股份有限公司重大课题:桥上CRTS Ⅱ型板式无砟轨道连续底座板后浇带服役状态健康监测评估及路桥过渡段底座板混凝土连续劣化整治关键技术研究(2022-20) （2022-20）
