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山东大学学报 (工学版) ›› 2025, Vol. 55 ›› Issue (6): 142-150.doi: 10.6040/j.issn.1672-3961.0.2024.178

• 土木工程 • 上一篇    

废旧轮胎格栅环向约束散体桩承载特性

徐润1,刘志鲲2,孙建秀1,于洋3,张常勇1,刘亚珍2*,岳红亚1,张宏博2   

  1. 1.山东省交通规划设计院集团有限公司, 山东 济南 250100;2.山东大学齐鲁交通学院, 山东 济南 250002;3.济南大学土木建筑学院, 山东 济南 250024
  • 发布日期:2025-12-22
  • 作者简介:徐润(1979— ),男,山东济宁人,研究员,主要研究方向为大宗固废再生资源化利用. E-mail:xurunl@163.com. *通信作者简介:刘亚珍(1998— ),女,山东济宁人,工程师,硕士,主要研究方向为固废再生利用. E-mail:liuyazhen@sdu.edu.cn
  • 基金资助:
    山东省自然科学基金资助项目(ZR2022QE064)

Bearing characteristics of dispersed piles with radial constraints from waste tire grids

XU Run1, LIU Zhikun2, SUN Jianxiu1, YU Yang3, ZHANG Changyong1, LIU Yazhen2*, YUE Hongya1, ZHANG Hongbo2   

  1. XU Run1, LIU Zhikun2, SUN Jianxiu1, YU Yang3, ZHANG Changyong1, LIU Yazhen2*, YUE Hongya1, ZHANG Hongbo2(1. Shandong Provincial Communications Planning and Design Insitute Group Co., Ltd., Jinan 250100, Shandong, China;
    2. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China;
    3. School of Civil Engineering and Architecture, Jinan University, Jinan 250024, Shandong, China
  • Published:2025-12-22

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摘要： 为解决碎石类散体桩加固软土地基时土体侧向约束能力不足,发生扩径、桩顶鼓胀破坏等工程问题,提出废旧轮胎格栅环向约束桩复合地基技术。通过考虑加筋类型、桩径及垫层形式的变化,开展单桩及复合地基承载试验,测试得到荷载-位移曲线;基于不同的破坏模式,提出散体桩单桩承载力计算方法,并进行准确性验证。结果表明:相较于普通散体桩在较小位移条件下即达到极限破坏状态,环向约束桩极限承载力明显提高;对比土工格栅环向约束桩,轮胎格栅约束桩荷载-位移曲线未出现明显的破坏点,表明其径向约束能力更强;对比不同桩径条件下的环向约束桩荷载-位移曲线,可知适当增大桩径对于提高桩体承载力效果显著,而设置碎石垫层可提升桩体承载力。研究成果对于该类型桩基的推广应用、提高固废资源循环利用具有重要的工程应用价值。

关键词: 废旧轮胎格栅, 环向约束散体桩, 复合地基加固, 荷载-位移曲线, 极限承载

Abstract: In order to solve the engineering problems such as insufficient lateral restraining capacity of the soil body and the susceptibility to spreading and bulging damage at the top of the pile when the rubble type bulk piles were reinforcing the soft ground foundation, the composite foundation technology of waste tyre grillage ring-restrained piles was proposed. By considering the changes of reinforcement type, pile diameter and bedding form, single-pile and composite foundation bearing tests were carried out, and the load-displacement curves were tested; based on different damage modes, the calculation method of single-pile bearing capacity of bulk piles was proposed and verified for accuracy. The results showed that: compared with ordinary bulk piles that reach the ultimate damage state under small displacement conditions, the ultimate bearing capacity of ring-restrained piles was obviously improved; compared with the geogrid ring-restrained piles, the load-displacement curves of tyre grid-restrained piles did not show any obvious damage points, which indicated that their radial restraining capacity was stronger; comparing with the load-displacement curves of ring-restrained piles under different pile radius conditions, it indicated that increasing the pile diameter was very effective in improving the bearing capacity of the piles. Comparing the load-displacement curves of piles with different pile diameters, it was indicated that increasing the pile diameter appropriately had a significant effect on increasing the pile bearing capacity, and the setting of gravel bedding further improved the pile bearing capacity. The study results had important engineering application value for the promotion of this type of pile foundation and the improvement of recycling of solid waste resources.

Key words: waste tire grids, circular constraint loose pile, composite foundation reinforcement, load-displacement curve, ultimate bearing capacity

中图分类号: 

  • TU472
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