土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (4): 576-579.

• 专题论述 • 上一篇    下一篇

桩承式加筋路堤内三维土拱演变

劳俊源1，迟柄石2，赵林爽3   

  1. （1.中国能源建设集团广西电力设计研究院有限公司，南宁 530007；
    2.汕头大学土木与环境工程系，广东汕头 515063；3.汕头大学土木与环境工程系，广东汕头 515063）
  • 收稿日期:2023-06-17 修回日期:2023-07-04 出版日期:2025-08-31 发布日期:2025-08-27
  • 作者简介:劳俊源（1989-），男，硕士，高级工程师，研究方向为桩承式路堤、土拱效应、桩土相互作用等。
  • 基金资助:
    国家自然科学基金青年基金(42102308)；汕头大学新引进教师启动经费(NTF21008-2021)；2021年广东省大专项项目(STKJ2021168)

Evolution of Three-Dimensional Soil Arching within a Pile-Supported and Geogrid-Reinforced Embankment

LAO Junyuan1, CHI Bingshi2, ZHAO Linshuang3   

  1. (1.CHINA Energy Engineering Group, Guangxi Electric Power Design Institute Co. Ltd., Nanning 530007；
    2.Department of Civil and Environmental Engineering, Shantou University, Shantou 515063；
    3.Department of Civil and Environmental Engineering, Shantou University, Shantou 515063)
  • Received:2023-06-17 Revised:2023-07-04 Online:2025-08-31 Published:2025-08-27

摘要： 采用三维有限元模型研究了桩承式加筋路堤内土拱的演化过程，通过与全尺寸实验的实测数据对比，验证了所得结果。对路堤施工过程和静载过程中土拱的发展进行了评价。研究表明，桩帽平均应力与底土平均应力的应力集中比随填方高度的增加而增大。但在静态分级加载过程中，这一比率几乎没有增加。在土拱过程中，拱脚主要位于桩帽的边缘和角落，而不是桩帽的中心。这导致桩帽上的应力分布不均匀，边缘和角落的应力大于中心的应力。随着路堤填筑高度的增加和土拱的演变，拱脚向中心移动。土拱的临界高度为桩帽净间距的1.3～1.4倍。此外，对不同位置的拱高进行了评估，其值大致相等。


关键词: 有限元模型, 桩承式加筋路堤, 土拱

Abstract: This study investigated the evolution of soil arching within a pile-supported and geogrid-reinforced embankment using a three-dimensional finite element model. The results were verified through a comparison with the measured data obtained from a full-scale experiment. The development of the soil arching was evaluated during the embankment construction process and the static step-loading process. The study revealed that the stress concentration ratio between the average stress on the pile-cap and that on the subsoil increases with the increasing height of the embankment fill. But this ratio increased little during the static step-loading process. In the soil arching process, the arch foot was mainly located at the edge and corner, not the center of the pile-cap. This resulted in an uneven stress distribution on the pile-cap, with stress at the edge and corner larger than that at the center. With the increase of embankment filling height and the evolution of soil arch, the arch foot moves towards the center. The critical height of the soil arching is 1.3 to 1.4 times the net spacing between pile caps. Additionally, the arching heights were assessed at different locations of the embankment, and their values were approximately equal.

Key words: finite element model, Pile-Supported and Geogrid-Reinforced Embankment, Soil arching

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