内置式加筋土桥台工作性能的数值模拟

doi:10.3969/j.issn.1674-0696.2025.06.05

重庆交通大学学报（自然科学版） ›› 2025, Vol. 44 ›› Issue (6): 45-52.DOI: 10.3969/j.issn.1674-0696.2025.06.05

• 道路与铁道工程 • 上一篇

内置式加筋土桥台工作性能的数值模拟

左彬澧1，徐超1,2，王清明1，胥昕怡1，杜春雪1

(1. 同济大学地下建筑与工程系，上海 200092； 2. 同济大学岩土工程与地下结构教育部重点试验室，上海 200092)

收稿日期:2024-05-14 修回日期:2025-03-14 发布日期:2025-06-30
作者简介:左彬澧（1999—），男，重庆涪陵人，博士研究生，主要从事加筋土结构与数值仿真方面的研究。E-mail: 2111045@tongji.edu.cn 通信作者：徐超（1965—），男，河南临颍人，教授，博士，主要从事土工合成材料及地基加固方面的研究。E-mail: c_axu@tongji.edu.cn
基金资助:
安徽省交通运输重点科技项目（2021-KJQD-016）

Numerical Simulation of the Working Performance of Embedded Geosynthetic-Reinforced Soil Abutment

ZUO Binli1, XU Chao1,2, WANG Qingming1, XU Xinyi1, DU Chunxue1

(1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China)

Received:2024-05-14 Revised:2025-03-14 Published:2025-06-30

摘要/Abstract

摘要： 内置式加筋土桥台作为非承重加筋土桥台的一种型式，在工程中有良好的经济效益，但桩的存在会改变加筋土桥台内部的受力特征，从而影响内置式加筋土桥台的工作性能。基于某内置式加筋土桥台工程原型及其监测结果，使用FLAC3D建立了1∶1的三维数值模型，分析了工作状态下内置式桥台的受力与变形性能。以设计需求为导向，研究了桩体与桥台面板的水平净距、桩径以及筋材绕桩方式对内置式加筋土桥台工作性能的影响。研究结果表明：桩（柱式台）与加筋土桥台之间存在明显的相互作用，桩体表面存在负摩阻力，同时桩对加筋土体起到了侧向阻挡作用，从而减小了作用于面板背部的水平土压力；桩体水平净距的减小会减小桩前小应力区范围、增大桥台面板侧向位移；增大桩径会增加桩体承载宽度，减小桩体侧向位移，增强桩体抵抗侧向土压力的能力；采用刚性套管的筋材绕桩方式可以提高加筋土桥台的整体性，减小桥台的侧向位移。

关键词: 道路工程；加筋土桥台；内置式；相互作用；数值模拟

Abstract: The embedded geosynthetic-reinforced soil abutment is one type of non-load-bearing abutments and has good economic benefits in engineering. However, the presence of piles can change the internal stress characteristics of the geosynthetic-reinforced soil abutment, thereby affecting its working performance. Based on a prototype of an embedded geosynthetic-reinforced soil abutment project and its monitoring results, a 1∶1 three-dimensional numerical model was established using FLAC3D to analyze the stress and deformation performance of the embedded bridge abutment under working conditions. Guided by design requirements, the effects of horizontal clearance between piles and abutment facing, pile diameter, and reinforcement around pile method on the working performance of the embedded geosynthetic-reinforced soil abutment were studied. The research results show that there is a significant interaction between the pile (column abutment) and the geosynthetic-reinforced soil abutment, and there is negative frictional resistance on the surface of the pile. At the same time, the pile acts as a lateral barrier to the reinforced soil, thereby reducing the horizontal soil pressure acting on the back of the facing. The reduction of the horizontal clearance of the pile will decrease the range of small stress zones in front of the pile and increase the lateral displacement of the abutment facing. Increasing the pile diameter will increase the bearing width of the pile, reduce the lateral displacement of the pile, and enhance the ability of the pile to resist lateral soil pressure. The use of reinforcement around pile method with rigid casing can improve the integrity of geosynthetic-reinforced soil abutment and reduce lateral displacement of the abutment.

Key words: highway engineering; geosynthetic-reinforced soil abutment; embedded; interaction; numerical simulation

中图分类号:

U416

左彬澧1，徐超1,2，王清明1，胥昕怡1，杜春雪1. 内置式加筋土桥台工作性能的数值模拟[J]. 重庆交通大学学报（自然科学版）, 2025, 44(6): 45-52.

ZUO Binli1, XU Chao1,2, WANG Qingming1, XU Xinyi1, DU Chunxue1. Numerical Simulation of the Working Performance of Embedded Geosynthetic-Reinforced Soil Abutment[J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(6): 45-52.

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内置式加筋土桥台工作性能的数值模拟

Numerical Simulation of the Working Performance of Embedded Geosynthetic-Reinforced Soil Abutment

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