位移调节器用于端承型桩筏基础的模型试验研究

周 峰; 郭 亮; 刘壮志; 王旭东; 王继果

位移调节器用于端承型桩筏基础的模型试验研究 English Version

1. 南京工业大学交通学院，江苏南京 210009; 2. 三江学院土木工程学院，江苏南京 210012

基金项目: 国家自然科学青年基金项目（ 51008159 ）；住房与城乡建设

详细信息

作者简介:
周峰 (1979 – ) ，男，江苏阜宁人，博士，副教授，硕士生导师，主要从事桩土共同作用方面的理论研究与工程实践。

中图分类号: TU470
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出版历程
- 收稿日期: 2011-01-05
- 发布日期: 2012-02-19

Model tests on end-bearing pile foundation by use of settlement adjustor

1. College of Transportation Science & Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. College of Civil Engineering, Sanjiang University, Nanjing 210012, China

摘要

摘要: 位移调节器是用于调节物体支承接触点之间位移的特殊装置，可用来保证端承型桩筏基础桩–土的变形协调和共同作用。为研究端承型桩筏基础中位移调节器的设置对桩–土–筏相互作用的影响，进行了位移调节器设置前后端承型桩筏基础的室内模型对比试验。试验测量了桩身轴力、筏板沉降及桩间土反力，分析了不同荷载级别下端承型桩筏基础的荷载传递规律、整体沉降与差异沉降分布特征以及桩土荷载分担比等内容，结果表明：与常规端承型桩筏基础相比，位移调节器的设置改变了桩筏基础的荷载传递规律，顺利实现了桩土的共同作用，同时适当支承刚度的调节器可优先且充分地发挥筏底土体承载能力，优化桩土荷载分担比。结论可为进一步理论研究提供试验依据。
- 位移调节器 /
- 端承型桩筏基础 /
- 桩土共同作用 /
- 荷载传递规律
Abstract: Settlement adjustor is a special device used to adjust the displacement between contact points of structures. The installation of the settlement adjustor can ensure the deformation coordination and the interaction for pile-soil of end-bearing piled raft foundation. In order to study the influence of the settlement adjustor on the interaction with pile-soil-raft of end-bearing piled raft foundation, laboratory model tests are performed before and after the installation of the settlement adjustor. The axial forces of pile ， the settlement of raft and the raft-soil contact pressure are measured. Then, the pile-soil load transfer mechanism, the settlement and difference settlement of raft and the pile-soil load sharing ratio of end-bearing piled raft foundation under different load levels are analyzed. The results show that, as compared with the conventional end-bearing piled raft foundation, the installation of the settlement adjustor has changed the load transfer rule of piled raft foundation and achieved the interaction of pile-soil. Suitable bearing stiffness of the settlement adjustor can give priority and full play to the bearing capacity of the soil beneath the raft and optimize the pile-soil load sharing ratio. The conclusions can provide the experimental basis for further theoretical researches.
- settlement adjustor /
- end-bearing piled raft foundation /
- pile-soil interaction /
- load transfer rule

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参考文献(16)

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