| 褥垫层对复合地基承载机理的影响 |
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| 引用本文： | 李宁,韩煊.褥垫层对复合地基承载机理的影响[J].土木工程学报,2001,34(2):68-73. |
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| 作者姓名： | 李宁 韩煊 |
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| 作者单位： | 西安理工大学 |
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| 摘 要： | 首先利用数值试验的方法,系统研究了4种模量的代表性群桩复合地基(极柔性桩、一般柔性桩、半刚性桩、刚性桩)施加褥垫后的承载性状,分析了褥垫在复合地基中的加固机理与作用.提出利用褥垫层对复合地基承载力进行优化设计的基本方法与思路.
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| 关 键 词： | 复合桩基 褥垫 加固机理 优化设计 |
| 文章编号： | 1000-131(2001)02-0068-06 |
| 修稿时间： | 1999年1月4日 |
STUDY ON MECHANISM OF CUSHION IN COMPOSITE PILE FOUNDATION |
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| LI Ning,Han Xuan.STUDY ON MECHANISM OF CUSHION IN COMPOSITE PILE FOUNDATION[J].China Civil Engineering Journal,2001,34(2):68-73. |
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| Authors: | LI Ning Han Xuan |
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| Affiliation: | Li NingHan Xuan (Xi'an University of Technology)(Beijing Geotechnical Institute) |
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| Abstract: | A cushion is installed under a pile cap, then the load is redistributed between the pile and soil. A numerical simulation test of four kinds of the pile foundation with different cushion is performed. The strengthening mechanism of a cushion in the pile foundation is studied. An optimized design and construction method of the cushion is proposed in the paper for a composite pile foundation. The results show that the bearing capacity of a composite pile foundation is obviously increased by adopting an appreciate cushion. The stress concentration is greatly reduced due to the cushion. The optimal thickness of a cushion is of 0.2～0.5m. |
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| Keywords: | composite pile foundation cushion strengthening mechanism design optimization |
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