| 复合地基中褥垫作用机理研究 |
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| 引用本文： | 李宁,韩烜. 复合地基中褥垫作用机理研究[J]. 岩土力学, 2000, 21(1): 10-15 |
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| 作者姓名： | 李宁 韩烜 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室, 甘肃 兰州 730000)1 ( 西安理工大学岩土所, 陕西 西安 710048)2 ( 北京市勘察设计研究院, 北京 100038)3 |
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| 摘 要： | 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： | 复合地基 褥垫 作用机理 优化设计 |
| 收稿时间： | 1999-06-08 |
| 修稿时间： | 1999-06-08 |
Numerical tests on the mechanism of the cushion in composite foundation |
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| Li Ning,Han Xuan. Numerical tests on the mechanism of the cushion in composite foundation[J]. Rock and Soil Mechanics, 2000, 21(1): 10-15 |
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| Authors: | Li Ning Han Xuan |
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| Affiliation: | ( State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS , 730000 , China)1 ( Xi an University of Technology, Xian 710048 , China)2 ( Beijing Geotechnical Institute , Beijing 100038 , China)3 |
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| Abstract: | By means of proper numerical modeling, four kinds of pile composite foundation ( from the most flexible pile to the stiffest pile)with different cushions are tested numerically in this paper. The strengthening mechanism of the cushion in pile foundation is studied and discussed further.The optimized design and construction method of the cushion is then proposed for group pile composite foundation . The numerical tests show that ( 1) the bearing capacity of the pile composite foundation is obviously increased by proper usage of cushion , because the cushion reduces the stress concentration greatly; ( 2)the proper thickness of the cushion of optimized within 0. 2 ～ 0 . 5 m through enough numerical tests from the basic consideration of the optimization of load sharing ratio between pile and soil . |
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| Keywords: | composite foundation cushion strengthening mechanism design optimization |
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