铁道标准设计2025，Vol.69Issue(6)：1-5,22,6.DOI:10.13238/j.issn.1004-2954.202409180006
基于流固耦合理论的CRTSⅢ型无砟轨道SCC灌注参数影响规律研究
Research on the Influence of SCC Pouring Parameters of CRTSⅢBallastless Track Based on Fluid-Structure Coupling Theory
摘要
Abstract
The CRTSⅢ ballastless track has become the main type of track structure for newly built high-speed railways in China.As a critical process,the pouring construction of self-compacting concrete(SCC)directly affects the smoothness of track structure.To investigate the influencing mechanism of SCC rheological parameters on the quality and efficiency of pouring construction,a finite element analysis model of the complete SCC pouring process was established based on fluid-structure coupling theory.The mechanical properties of track structure during SCC pouring and their variation patterns affected by rheological parameters were studied.The results showed that the buoyancy force and displacement variation of track slab during SCC pouring could be divided into four stages.Plastic viscosity had greater influence on SCC than yield stress.As plastic viscosity increased,the pouring time,buoyancy force,and track slab displacement first decreased and then increased.As yield strength increased,the pouring time,buoyancy force,and track slab displacement increased gradually.To ensure the quality of pouring construction,the optimal ranges for SCC rheological parameters were:yield stress of 45 to 65 Pa and plastic viscosity of 90 to 120 Pa·s.The research findings can provide theoretical support for optimizing materials and processes in SCC pouring construction.关键词
CRTSⅢ型无砟轨道/自密实混凝土/流固耦合/灌注施工/流变参数Key words
CRTSⅢ ballastless track/self-compacting concrete/fluid-structure coupling/pouring construction/rheological parameters分类
交通工程引用本文复制引用
高亮,孙洪斌,张广海,周会,郑小明,张红乾..基于流固耦合理论的CRTSⅢ型无砟轨道SCC灌注参数影响规律研究[J].铁道标准设计,2025,69(6):1-5,22,6.基金项目
山东省交通运输厅科技计划项目(2021B99) （2021B99）
