| 夯实水泥土桩复合地基承载特性分析 |
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| 引用本文： | 郭忠贤,霍达,张明聚.夯实水泥土桩复合地基承载特性分析[J].北京工业大学学报,2009,35(8):1045-1053. |
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| 作者姓名： | 郭忠贤 霍达 张明聚 |
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| 作者单位： | 北京工业大学建筑工程学院,北京,100124;石家庄铁道学院土木工程分院,石家庄,050043;北京工业大学建筑工程学院,北京,100124 |
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| 摘 要： | 基于夯实水泥土桩复合地基载荷试验的结果,分析了复合地基在竖向荷载作用下垫层、桩及桩间土的共同作用机理,假设桩侧摩阻力分布形状,建立夯实水泥土桩复合地基的分析模型,考虑复合地基中桩、土变形协调,提出了一种计算复合地基桩土应力比的方法.利用该方法对夯实水泥土桩复合地基在竖向荷载作用下的承载特性进行深入研究,重点分析了垫层模量、桩端持力层模量、桩土相对刚度比、桩长径比对桩土应力比的影响.结果表明:夯实水泥土桩复合地基中垫层的模量对桩土应力比的影响要远大于桩端土持力层的模量;桩长径比的增加会使桩土应力比趋于一定值,说明复合地基中临界桩长的存在;增大桩长并同时提高桩土相对刚度比能显著提高桩土应力比.
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| 关 键 词： | 夯实水泥土桩 复合地基 变形协调 桩土应力比 承载特性 |
Bearing Behavior of Compacted Cement-soil Pile Composite Foundation |
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| GUO Zhong-xian,HUO Da,ZHANG Ming-ju.Bearing Behavior of Compacted Cement-soil Pile Composite Foundation[J].Journal of Beijing Polytechnic University,2009,35(8):1045-1053. |
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| Authors: | GUO Zhong-xian HUO Da ZHANG Ming-ju |
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| Affiliation: | 1.College of Civil Engineering and Architecture;Beijing University of Technology;Beijing 100124;China;2.Department of Civil Engineering;Shijiazhuang Railway Institute;Shijiazhuang 050043;China |
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| Abstract: | On the basis of filed loading test results of compacted cement-soil pile composite foundation,the cooperation mechanismof piles,surrounding soil and cushionis analyzed under vertical load.Analyzing model is proposed by considering the distribution behavior of skinfriction between the pile andthe surroundings,and the method to calculate the stress ratio of piles to soil isintroduced by considering harmony working of piles,surrounding soil and cushion in composite foundation.The bearing behavior of compacted ... |
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| Keywords: | compacted cement-soil pile composite foundation harmony working stress ratio of piles tosoil bearing behavior |
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