北京交通大学学报2024，Vol.48Issue(1)：106-114,9.DOI:10.11860/j.issn.1673-0291.20230040
SCC灌注过程中轨道板变形与扣压装置受力特性分析
Analysis on track slab deformation and clamps mechanical characteristics during SCC pouring process
摘要
Abstract
Addressing the issues of floating of track slabs and excessive forces on clamps during thepouring process of Self-Compacting Concrete (SCC), a Coupled Eulerian-Lagrangian (CEL) method is employed. This study establishes a fluid-solid coupling model for the pouring process of SCC in the CRTS Ⅲ slab track on straight sections. Theoretical exploration is conducted on the effects and mechanisms of various construction parameters on the SCC pouring process. A primary focus is placed on the impact of funnel height and number on filling rates, vertical and lateral displacements of track slabs, and clamps forces. Results indicate that increasing funnel height and number decreases pouring time and enhances construction efficiency, with a more pronounced effect for the latter. During single-hole pouring, the maximum vertical displacement of track slabs occurs in the middle of the slab edge, while during double-hole pouring, it is near the observation hole. Maximum lateral displacement oc-curs near the clamps. Greater funnel height results in higher SCC pressure on the track slabs, leadingto increased vertical and lateral displacements, as well as higher clamp forces. Notably, double-hole pouring results in greater final floating and lateral displacements of track slabs, along with higher clamp forces, compared to single-hole pouring.关键词
无砟轨道/数值模拟/自密实混凝土/CEL方法/漏斗高度/漏斗数量Key words
slab track/numerical simulation/self-compacting concrete/CEL method/funnel height/funnel number分类
交通运输引用本文复制引用
张浩楠,张艳荣,吴楷,高亮,张爽,丁一..SCC灌注过程中轨道板变形与扣压装置受力特性分析[J].北京交通大学学报,2024,48(1):106-114,9.基金项目
国家自然科学基金(52378214) （52378214）
运城市揭榜挂帅项目(C22M0011)National Natural Science Foundation of China(52378214) （C22M0011）
Unveiled Project of Yuncheng(C22M0011) （C22M0011）
