| 现浇混凝土薄壁管桩复合地基桩土应力比影响因素分析 |
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| 引用本文： | 刘汉龙,张波.现浇混凝土薄壁管桩复合地基桩土应力比影响因素分析[J].岩土力学,2008,29(8):2077-2080. |
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| 作者姓名： | 刘汉龙 张波 |
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| 作者单位： | 河海大学,岩土力学与堤坝工程教育部重点实验室,南京,210098;河海大学,岩土工程科学研究所,南京,210098 |
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| 基金项目： | 国家自然科学基金资助
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江苏省"六大人才高峰"基金资助项目 |
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| 摘 要： | 桩土应力比是复合地基设计计算中一个重要参数.基于盐―通高速公路单桩复合地基静载试验,通过有限元模拟,研究了褥垫层模量和厚度、桩体模量、桩长、基础刚度等影响因素对现浇混凝土薄壁管桩复合地基桩土应力比的影响.结果表明所建立的模型是合理的.褥垫层模量增大或厚度减小导致桩土应力比增大,桩体模量、桩长和基础刚度的增加可使桩土应力比增加.
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| 关 键 词： | 现浇混凝土薄壁管桩(PCC) 复合地基 数值模拟 桩土应力比 |
| 收稿时间： | 2006-10-16 |
Analysis of factors influencing stress ratio between pile and soil of composite foundation with cast-in-situ concrete thin-wall pipes |
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| LIU Han-long,ZHANG Bo.Analysis of factors influencing stress ratio between pile and soil of composite foundation with cast-in-situ concrete thin-wall pipes[J].Rock and Soil Mechanics,2008,29(8):2077-2080. |
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| Authors: | LIU Han-long ZHANG Bo |
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| Institution: | 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China |
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| Abstract: | The stress ratio between pile and soil is a key parameter for the design and calculation of composite foundations. Based on single pile composite foundation static load tests of Yan-Tong Expressway, the influences of cushion modulus and thickness, pile modulus, pile length, base stiffness etc. on the stress ratio of pile-soil are analyzed by using the finite element analysis. The results show that the model built is reasonable. The stress ratio of pile-soil increases with the cushion modulus increase or thickness decrease, and with the increases of pile modulus, pile length, base stiffness. |
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| Keywords: | cast-in-situ concrete thin-wall pipe pile composite foundation numerical simulation stress ratio between pile and soil |
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