| 膨胀土地基中桩荷载传递规律的解析分析 |
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| 引用本文： | 范臻辉,张春顺,肖宏彬.膨胀土地基中桩荷载传递规律的解析分析[J].铁道科学与工程学报,2010,7(6). |
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| 作者姓名： | 范臻辉 张春顺 肖宏彬 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075;中南林业科技大学,湖南,长沙,410004 |
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| 基金项目： | 国家自然科学基金资助项目(50978097); 湖南省自然科学基金资助项目(08JJ3092); 湖南省教育厅重点资助项目(07A017) |
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| 摘 要： | 基于桩-土相互作用的机理,利用剪切位移法及叠加原理推求了膨胀土地基中考虑膨胀土膨胀时的单桩荷载传递的解析解,并编制了相应的程序进行各影响参数的分析.分析结果表明:桩长增加,桩身抬升位移减小,桩身拉力的增加;埋入膨胀影响深度以下较深的小直径桩(d<0.044 L)能有效地降低膨胀土中桩顶位移,而大于该直径,桩径的增加对桩顶位移减小量用处不大;桩项荷载的增加,桩身的抬升位移及拉力逐渐减小,阻止桩向上运动所需的桩顶荷栽约为未受荷载的桩中最大拉力的2.5倍.研究结果为膨胀土中桩基的合理设计提供了理论依据.
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| 关 键 词： | 膨胀土 桩 剪切位移法 荷载传递 |
Analytical analysis of load-transfer of single pile in expansive soil |
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| FAN Zhen-hui
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ZHANG Chun-shun
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XIAO Hong-bin.Analytical analysis of load-transfer of single pile in expansive soil[J].Journal of Railway Science and Engineering,2010,7(6). |
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| Authors: | FAN Zhen-hui ZHANG Chun-shun XIAO Hong-bin |
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| Institution: | FAN Zhen-hui1,ZHANG Chun-shun1,XIAO Hong-bin2(1.School of Civil Engineering , Architecture,Central South University,Changsha 410075,China,2.Central South University of Forestry , Technology,Changsha 410004,China) |
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| Abstract: | The derivation of analytic solution to load-transfer for single pile in expansive soil under its swelling was carried out by the shear-deformation method and superposition principle.The corresponding grogram was then compiled to analyze the various factors that affect the pile behavior in expansive soils.The analyzing result show as follows: with the increase of the pile length,upward pile movement could decrease greatly,but meanwhile,tensile force of pile shaft increase as well;the increases of small piles... |
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| Keywords: | expansive soil pile shear-deformation method load transfer |
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