[1] QIU Ruizhe, LIU Kaiwen, YANG Zhixiang, MA Chiyuan, et al. Physical and numerical modeling of a framed anti‑sliding structure for a mountainous railway line [J]. Journal of Southeast University (English Edition), 2025, 41 (1): 12-19. [doi:10.3969/j.issn.1003-7985.2025.01.002]

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Physical and numerical modeling of a framed anti‑sliding structure for a mountainous railway line()

山区铁路框架式抗滑结构模型试验及数值模拟

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

41

Issue:

2025 1

Page:

12-19

Research Field:

Traffic and Transportation Engineering

Publishing date:

2025-03-07

Info

Title:

Physical and numerical modeling of a framed anti‑sliding structure for a mountainous railway line

山区铁路框架式抗滑结构模型试验及数值模拟

Author(s):

QIU Ruizhe¹;  LIU Kaiwen¹; 2;  YANG Zhixiang³;  MA Chiyuan¹;  XIAO Jian¹;  SU Qian²

1.School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.Key Laboratory of High‑Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
3.Chengdu Branch of Sichuan Chengmian Cangba Expressway Co., Ltd., Chengdu 610213, China

邱睿哲¹;  刘凯文¹; 2;  杨智翔³;  马驰原¹;  肖健¹;  苏谦²

1.西南交通大学土木工程学院，成都 610031
2.西南交通大学高速铁路线路工程教育部重点实验室，成都 610031
3.四川成绵苍巴高速公路有限责任公司成都分公司，成都 610213

Keywords:

mountainous railway;  slope;  framed anti‑sliding structure;  model test;  finite element modeling;  mechanical responses

山区铁路; 边坡; 框架式抗滑结构; 模型试验; 有限元模拟; 力学响应

PACS:

U416.1

DOI:

10.3969/j.issn.1003-7985.2025.01.002

Abstract:

To ensure the operational safety of railways in the landslide‑prone areas of mountainous regions, a large‑scale model test and numerical simulation were conducted to study the bending moment distribution, internal force distribution, deformation development, and crack propagation characteristics of a framed anti‑sliding structure (FAS) under landslide thrust up to the point of failure. Results show that the maximum bending moment and its increase rate in the fore pile are greater than those in the rear pile, with the maximum bending moment of the fore pile approximately 1.1 times that of the rear pile. When the FAS fails, the displacement at the top of the fore pile is significantly greater, about 1.27 times that of the rear pile in the experiment. Major cracks develop at locations corresponding to the peak bending moments. Small transverse cracks initially appear on the upper surface at the intersection between the primary beam and rear pile and then spread to the side of the structure. At the failure stage, major cracks are observed at the pil‑beam intersections and near the anchor points. Strengthening flexural stiffness at intersections where major cracks occur can improve the overall thrust‑deformation coordination of the FAS, thereby maximizing its performance.

为保证山区滑坡易发地区铁路的运营安全，通过大比例尺模型试验和数值模拟方法研究了山区铁路框架式抗滑结构在滑坡推力作用下直至结构失效过程中的弯矩分布特点、内力分布特点、变形发展规律及裂缝发展规律。结果表明，前桩的最大弯矩及增加率均大于后桩，前桩的最大弯矩约为后桩的1.1倍。当框架式抗滑结构失效时，前桩桩顶位移更为显著，大约是后桩的1.27倍。主要裂缝出现在与峰值弯矩对应的位置。横向微小裂缝首先出现在主梁与后桩连接处的上表面，随后扩散至结构侧面。在失效阶段，主要裂缝出现在桩-梁交接处及锚固点附近。增强主要裂缝发生截面的抗弯刚度，可以提高框架式抗滑结构的整体荷载-变形协调性，从而最大限度地发挥结构的性能。

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Memo

Memo:

Received 2024-09-18,Revised 2024-11-28.
Biographies:Qiu Ruizhe (1995─), male, Ph.D. candidate; Liu Kaiwen (corresponding author), male, doctor, professor, kaiwenliu@swjtu.edu.cn.
Foundation item:The National Natural Science Foundation of China (No.52078427).
Citation:QIU Ruizhe,LIU Kaiwen,YANG Zhixiang,et al.Physical and numerical modeling of a framed anti-sliding structure for a mountainous railway line[J].Journal of Southeast University (English Edition),2025,41(1):12-19.DOI:10.3969/j.issn.1003-7985.2025.01.002.DOI:10.3969/j.issn.1003-7985.2025.01.002

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