Investigating the mud pumping phenomena and dynamic characteristics in ballasted track subgrade under multi-stage/multi-frequency train load–wetting coupling

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Transportation Geotechnics Pub Date : 2025-03-19 DOI:10.1016/j.trgeo.2025.101545

Guoqing Cai , Bowen Han , Xu Yang , Huaxiong Wang

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引用次数: 0

Abstract

In the process of expanding ballasted railway capacity, there is a significant increase in train axle load and speed, which leads to significant mud pumping disease under multi-stage/multi-frequency train load-wetting coupling, and its mechanism is still unclear. Mud pumping model tests from ballasted track subgrades under multi-stage/multi-frequency train load-wetting (MSC-W test/MFC-W test) coupling were conducted. The test results show that in the unsaturated state, the accumulated deformation of MSC-W test is more significant than that of MFC-W test, and the compactness of the subgrade filler is greater without significant particle migration. Under saturated or near saturated conditions, the MSC-W and MFC-W tests produces significant mud pumping by the driving force of dynamic pore water pressure. The amounts of mud pumping, fine particle layer displacement and void contaminant index (VCI) of the MFC-W test are significantly higher than those of the MSC-W test.

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多级/多频列车载湿耦合下有碴轨道路基的抽泥现象及动力特性研究

在有碴铁路运力扩大过程中，列车轴荷和速度显著增加，导致多级/多频列车载湿耦合下出现明显的抽泥病，其机理尚不清楚。在多级/多频列车加载润湿（MSC-W试验/MFC-W试验）耦合条件下，对有碴轨道路基进行了泵送泥浆模型试验。试验结果表明，在非饱和状态下，MSC-W试验的累积变形比MFC-W试验更显著，路基填料的密实度更大，且颗粒迁移不明显。在饱和或近饱和条件下，MFC-W和MSC-W试验在动孔隙水压力的驱动下产生明显的泥浆泵送。MFC-W试验的抽泥量、细颗粒层位移和孔隙污染物指数（VCI）均显著高于MSC-W试验。

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来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.