Mechanical Properties of Rock Ballast in Combined Tamping and Stabilizing Operations Using Numerical Dynamic Domain

IF 3.4 2区工程技术 Q2 ENGINEERING, GEOLOGICAL International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-02-12 DOI:10.1002/nag.3961

Shunwei Shi, Yixiong Xiao, Yang Xu, Xichong Ren, Chunyu Wang, Yanan Zhang, Liang Gao

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Abstract

The maintenance effort for a ballast bed is determined by the combination of tamping and stabilizing, which have always been separated in previous researches. In this study, a tamping‐stabilizing‐ballasted track was established, and a dynamic domain was innovatively developed to improve calculation efficiency. This model was verified through a comparison with field test results. Using this model, the mechanical properties of ballast bed in tamping and stabilizing under different combination modes were firstly analyzed. The results indicate that the mechanical characteristics of rock ballast in tamping are much more intense than those in stabilizing, and repeated tamping may aggravate ballast degradation, but is beneficial for ballast rotation. Repeated tamping and stabilizing operations are conducive to the coordination number of rock ballast and contact density on the sleeper but have opposite effects on the compactness of rock ballast and pressure on the sleeper. The optimal combination model is determined to be T2S1, and this is followed by T1T1S1, according to a comprehensive evaluation of the mechanical state of ballast bed. This study can provide practical guidance for the combination of tamping and stabilizing operations in railway maintenance.

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来源期刊

International Journal for Numerical and Analytical Methods in Geomechanics 工程技术-材料科学：综合

CiteScore

6.40

自引率

12.50%

发文量

160

审稿时长

9 months

期刊介绍： The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.