考虑接触面厚度的桩土相互作用研究

    周勇, 朱亚薇

    周勇, 朱亚薇. 考虑接触面厚度的桩土相互作用研究[J]. 岩土工程学报, 2018, 40(S1): 247-251. DOI: 10.11779/CJGE2018S1040
    引用本文: 周勇, 朱亚薇. 考虑接触面厚度的桩土相互作用研究[J]. 岩土工程学报, 2018, 40(S1): 247-251. DOI: 10.11779/CJGE2018S1040
    ZHOU Yong, ZHU Ya-wei. Pile-soil interaction considering thickness of contact surface[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S1): 247-251. DOI: 10.11779/CJGE2018S1040
    Citation: ZHOU Yong, ZHU Ya-wei. Pile-soil interaction considering thickness of contact surface[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S1): 247-251. DOI: 10.11779/CJGE2018S1040

    考虑接触面厚度的桩土相互作用研究  English Version

    基金项目: 国家自然科学基金项目(51568042)
    详细信息
      作者简介:

      周 勇(1978- ),男,湖北宣恩人,博士,教授,博士生导师,国家一级注册结构工程师,主要从事深基坑开挖支护与边坡加固方面的教学和研究工作。E-mail:gsutzhouy@163.com。

    • 中图分类号: TU470.1

    Pile-soil interaction considering thickness of contact surface

    • 摘要: 土与支护结构相互作用的问题已引起学者的高度关注,对该领域的研究也有了新的突破。但考虑接触面厚度的桩土相互作用,无论是在计算模型的建立上还是在计算方法的选取上,都有待商榷。在考虑接触面厚度后,用刚-塑性理论模拟桩后土体,把塑性区域内的土体用串联的弹簧单元来模拟;在此基础上推导预应力锚杆支护桩的挠曲线微分方程,并用有限差分法计算桩身内力。结合工程实例,用PLAXIS软件进行数值验证,与用上述方法算得的桩身弯矩进行对比,发现计算结果略大于模拟结果,原因可能是串联弹簧个数不够导致的,说明弹簧个数必有一个最优值。通过分析对比,进一步说明该计算模型的可行性。
      Abstract: The problem of interaction between soil and supporting structure has aroused the attention of scholars, and the research on this field has also a new breakthrough. However, considering the thickness of the contact surface of pile-soil interaction, whether for the establishment of the computational model or for the selection of computational method, it is still open to question. After considering the thickness of the contact surface, the rigid plasticity theory is used to simulate the soil mass of pile, and the soil with the series of spring elements in the plastic area is simulated. On the basis of this method, the flexural differential equation of pre-stressed bolting pile is derived, and the finite difference method is used to calculate the internal forces of the pile body. Combined with the practical engineering, PLAXIS software is used for numerical validation, and the bending moment of pile compared with that using the above method. It is that found the results are slightly larger than the simulation ones. The reason may be that the series of spring number is not enough, indicating that there will be an optimal value for the spring number. Through the comparison analysis, the feasibility of the computational model is further illustrated.
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    出版历程
    • 收稿日期:  2017-06-10
    • 发布日期:  2018-08-24

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