可控刚度桩筏基础桩土共同作用的工程实践

发布时间：2018-05-14 09:11

本文选题：基础工程 + 端承桩　；参考：《岩石力学与工程学报》2017年12期

【摘要】：端承型桩等支承刚度较大的桩基础,在正常工作荷载作用下,桩顶较小的竖向变形无法保证桩土共同作用的实现,这可能导致良好的天然地基承载力得不到充分利用,造成极大的浪费。介绍的典型工程成功解决了支承刚度较大的桩基础难以实现桩土共同作用的问题,同时还实现了桩筏基础的变刚度调平,通过对工程设计及数值分析过程的详细论述与描写,并将现场测试数据与分析结果进行对比分析,验证可控刚度桩筏基础应用于该项目的合理性与可靠性。数值分析及现场实测结果显示,本工程采用可控刚度桩筏基础后,建筑物总沉降和差异沉降均满足设计要求,地基土分担了上部结构63%的的荷载,桩基数量大幅度降低,减少了高能耗建材的使用和桩基施工对周边环境的影响,取得了显著的经济效益和社会效益。本工程可控刚度桩筏基础实施所取得的相关经验与成果可供类似工程借鉴与参考。
[Abstract]:Under the normal working load, the small vertical deformation of the pile top can not guarantee the realization of the pile-soil interaction, which may lead to the good bearing capacity of the natural foundation can not be fully utilized. Cause great waste. The typical engineering has successfully solved the problem that the pile foundation with high supporting stiffness is difficult to realize the pile-soil interaction, at the same time, the variable stiffness leveling of the pile-raft foundation has been realized. Through the detailed discussion and description of the engineering design and numerical analysis process, The rationality and reliability of the pile-raft foundation with controllable stiffness applied to the project are verified by comparing the field test data with the analysis results. The results of numerical analysis and field measurement show that after adopting the pile-raft foundation with controllable stiffness, the total settlement and differential settlement of the building meet the design requirements, and the foundation soil shares 63% of the load of the superstructure, and the number of pile foundation is greatly reduced. The use of high energy consumption building materials and the influence of pile foundation construction on the surrounding environment are reduced, and remarkable economic and social benefits are obtained. The relevant experience and results obtained from the construction of pile-raft foundation with controllable stiffness can be used for reference in similar projects.
【作者单位】：南京工业大学交通运输工程学院;南京工业大学海西工程技术中心;厦门新区建筑设计有限公司;
【基金】：国家自然科学基金资助项目(51278244,51778287)~~
【分类号】：TU43;TU473.1

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