Influence of swelling behavior of expansive soil foundation on deformation performance of ballastless track subgrade

被引：0
|
作者：
Duan, Junyi [1 ]
Cao, Pengyuan [1 ]
Su, Yu [1 ]
Lin, Yuliang [2 ,3 ]
Yang, Guolin [2 ,3 ]
机构：
[1] School of Infrastructure Engineering, Nanchang University, Nanchang,330031, China
[2] School of Civil Engineering, Central South University, Changsha,410075, China
[3] National Engineering Research Center of High-speed Railway Construction Technology, Changsha,410075, China
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2024年 / 55卷 / 09期
关键词：
To study the impact of the swelling behavior in expansive soil foundations on the mechanical and deformation characteristics of ballastless track subgrades; firstly; the thermal properties of materials were introduced to simulate the swelling behavior of expansive soils through thermal-force coupling analysis; based on the theory of equivalence between temperature and moisture fields. Secondly; a three-dimensional numerical model of ballastless track-subgrade-expansive soil foundation for double-line railways was established and verified. Finally; the effects of the swelling potential(denoted by the coefficient of thermal expansion) and the swelling area(denoted by the longitudinal length of the swelling area) of the expansive soil foundation on the mechanical and deformation behavior of the ballastless track subgrade were investigated. The results show that localized water immersion causes swelling in the expansive soil foundation; resulting in heave; longitudinal irregularity and lateral tilting of the ballastless track structure. These effects are more pronounced with the increase of swelling potential and area in the foundation. However; when the length of the swelling area along the longitudinal direction of the subgrade exceeds 10 m; there is only a small increase in the lateral inclination angle for the ballastless track structure. Furthermore; the compression of the subgrade fillers results in an attenuation of the heave; and the attenuation rate of the heave increases with the increase of the swelling potential and decreases with the increase of the swelling area in the foundation. The heave amount; longitudinal unevenness of heave and lateral inclination angle of the ballastless track structure are suggested as the performance control indexes for ballastless track subgrades in expansive soils. Additionally; measures should be implemented to mitigate the uneven transverse distribution of subgrade heave and moisture gradient in expansive soil foundations; aiming to alleviate the lateral inclination of the ballastless track structures. © 2024 Central South University of Technology. All rights reserved;
D O I：
10.11817/j.issn.1672-7207.2024.09.025
中图分类号：
学科分类号：
摘要：
引用
收藏
页码：3530 / 3542
相关论文
共 50 条
  • [1] Influence of Water Immersion on Mechanical and Deformation Behaviors of Expansive Soil Subgrade for Ballastless Track
    Duan, Junyi
    Yang, Guolin
    Liu, Yang
    Kan, Jingliang
    Zhang, Liwei
    Tiedao Xuebao/Journal of the China Railway Society, 2022, 44 (04): : 119 - 126
  • [2] Swelling characteristics of andesite foundation induced by water immersion and their influence on ballastless track subgrade
    DUAN Jun-yi
    YANG Guo-lin
    HU Min
    LEI Xiao-qin
    LIN Yu-liang
    JournalofMountainScience, 2020, 17 (04) : 1001 - 1012
  • [3] Swelling characteristics of andesite foundation induced by water immersion and their influence on ballastless track subgrade
    Jun-yi Duan
    Guo-lin Yang
    Min Hu
    Xiao-qin Lei
    Yu-liang Lin
    Journal of Mountain Science, 2020, 17 : 1001 - 1012
  • [4] Swelling characteristics of andesite foundation induced by water immersion and their influence on ballastless track subgrade
    Duan Jun-yi
    Yang Guo-lin
    Hu Min
    Lei Xiao-qin
    Lin Yu-liang
    JOURNAL OF MOUNTAIN SCIENCE, 2020, 17 (04) : 1001 - 1012
  • [5] Deformation characteristics of double-line ballastless track subgrade under water immersion of expansive rock foundation
    Duan J.
    Yang G.
    Liu Y.
    Kan J.
    Qiu M.
    Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology), 2020, 51 (01): : 156 - 164
  • [6] Dynamic characteristics of soil subgrade bed for ballastless track
    Jiang G.
    Kong X.
    Meng L.
    Wang Z.
    Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University, 2010, 45 (06): : 855 - 862
  • [7] Influence of Chemical Additives and Flyash on the Swelling and Bearing Resistance of Expansive Subgrade Soil
    Radhakrishnan, G.
    Kumar, M. Anjan
    Raju, G. V. R. Prasada
    ADVANCES IN CHARACTERIZATION AND ANALYSIS OF EXPANSIVE SOILS AND ROCKS, 2018, : 1 - 7
  • [8] Analysis of Deformation Control of High-speed Railway Subgrade on Expansive Soil Foundation
    Yao, Yuchun
    Li, Anhong
    Chen, Weizhi
    Ding, Xuanming
    Cui, Xinzhuang
    Journal of Railway Engineering Society, 2024, 41 (10) : 13 - 17
  • [9] Reasonable style and mechanical property of ballastless track on soil subgrade
    Yang, Jian, 1600, Editorial Department of Journal of Railway Engineering Society, China (31):
  • [10] Study of dynamic characteristics of soil subgrade bed for ballastless track
    Zhan, Yong-Xiang
    Jiang, Guan-Lu
    Yantu Lixue/Rock and Soil Mechanics, 2010, 31 (02): : 392 - 396
12345