桩筏基础相对刚度及合理板厚的确定

陈云敏; 陈仁朋; 黄海丹

doi:10.13204/j.gyjz200505001

桩筏基础相对刚度及合理板厚的确定

doi: 10.13204/j.gyjz200505001

1.
1. 浙江大学岩土工程研究所杭州 310027;
2.
2. 河北省建筑设计研究院上海分院上海 200125

详细信息

作者简介:
陈云敏男 1962 年 2 月出生博士教授博士生导师

中图分类号: TU473.1
计量
- 文章访问数: 163
- HTML全文浏览量: 16
- PDF下载量: 261
- 被引次数: 0
出版历程
- 收稿日期: 2004-01-28
- 刊出日期: 2005-05-20

DEFINITION OF RELATIVE RIGIDITY AND PROPER RAFT THICKNESS OF PILE-RAFT FOUNDATION

1.
1. Institute of Geotechnical Engineering,Zhejiang University Hangzhou 310027;
2.
2. Shanghai Branch,Hebei Provincial Architectural Design &Research Institute Shanghai 200125

摘要

摘要: 采用考虑相互作用的桩筏基础简化分析方法，提出了一种新的桩筏基础相对刚度表达式，分析了桩筏基础相对刚度对筏板沉降、内力、桩顶反力分布的影响，研究了相对刚度与筏板长宽比的关系，并从发挥桩的承载力角度出发提出了合理板厚确定的公式。最后，用两个实例验证了板厚公式的合理性与工程应用的可行性。
- 共同作用 /
- 相对刚度 /
- 长宽比 /
- 板厚
Abstract: A new type of relative rigidity expression of pile- raft foundation is proposed using pile- raft foundation's simplified analytic method with interaction taken into account, it is analyzed that the effect of pile-raft foundation's relative rigidity on settlement of the raft, internal forces and reaction distribution of pile head; the relationship between the relative rigidity and length/width ratio of the raft is also researched. A rational formula of the raft thickness is put forward according to giving full play to the bearing capacity of the piles. Finally the rationality of the formula and the feasibility of engineering use are verified by two examples.
- coaction /
- relative rigidity /
- length/width ratio /
- raft thickness

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参考文献(10)

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[4] 宰金珉,宰金璋.高层建筑基础分析与设计--土与建筑物共同作用理论与应用.北京:中国建筑工业出版社,1994;

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[7] 陈云敏,陈仁朋,凌道盛.考虑相互作用的桩筏基础简化分析法.岩土工程学报,2001,23(6):686～691;

[8] 凌道盛,陈云敏,丁皓江.任意基础板的有限元分析.岩土工程学报,2000,22(4):450～455;

[9] Sommer H, Wittmann P, Ripper P. Piled Raft Foundation of a Tall Building in Frankfurt Clay. In: Proc. 11 Int. Conf. ON SMFE, 1985,4:2 253 ～ 2 257;

[10] 陈仁朋,凌道盛,陈云敏.群桩基础沉降计算中的几个问题.土木工程学报,2003,36(10):89～94

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