| 基于二维弹性变形的碎石桩复合地基固结分析 |
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| 引用本文： | 卢萌盟,谢康和,周国庆,李瑛. 基于二维弹性变形的碎石桩复合地基固结分析[J]. 岩石力学与工程学报, 2011, 0(Z1) |
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| 作者姓名： | 卢萌盟 谢康和 周国庆 李瑛 |
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| 作者单位： | 中国矿业大学深部岩土力学与地下工程国家重点实验室;中国矿业大学力学与建筑工程学院;浙江大学软弱土与环境土工教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(51009135); 中国博士后科学基金资助项目(20100481183); 中国矿业大学青年科研基金资助项目(2009A008) |
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| 摘 要： | 首先对超静孔压影响下的复合地基二维弹性变形性状进行分析,给出复合地基土体和桩体的体积应变、应力及位移等的解析表达式;然后,基于二维变形分析的结果,给出考虑外部荷载瞬时施加、土体内径竖向组合渗流以及扰动区土体水平向渗透系数3种变化模式的复合地基固结解;最后,对二维变形条件下的复合地基固结性状进行分析。分析结果表明:(1)考虑二维变形特性的复合地基固结解给出的固结度小于同等条件下只考虑一维变形的复合地基固结解答给出的固结度;(2)本文解给出的复合地基桩-土应力比随着地基固结逐渐增大,但和以往一维变形解预测结果不同的是,其值增大到一定程度即停止增长,并不会增大到桩-土压缩模量比之值;(3)跟传统一维变形解不同,本文考虑二维变形的复合地基固结解给出的桩-土应力比在初始时刻并不等于0。
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| 关 键 词： | 桩基工程 复合地基 碎石桩 固结 二维弹性变形 桩-土应力比 |
CONSOLIDATION ANALYSIS OF STONE COLUMN-REINFORCED COMPOSITE GROUND BASED ON TWO-DIMENSIONAL ELASTIC DEFORMATION |
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| LU Mengmeng,,XIE Kanghe,ZHOU Guoqing,LI Ying. CONSOLIDATION ANALYSIS OF STONE COLUMN-REINFORCED COMPOSITE GROUND BASED ON TWO-DIMENSIONAL ELASTIC DEFORMATION[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 0(Z1) |
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| Authors: | LU Mengmeng XIE Kanghe ZHOU Guoqing LI Ying |
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| Affiliation: | LU Mengmeng1,2,XIE Kanghe3,ZHOU Guoqing1,LI Ying3(1.State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221008,China,2.School of Mechanics and Civil Engineering,3.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou,Zhejiang 310058,China) |
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| Abstract: | Firstly,the two-dimensional elastic deformation behaviour of composite ground under the influence of excess pore water pressure is analyzed.Analytical solutions are obtained for the volumetric strain,stress and displacement within the column and surrounding soil,respectively.Based on the results of the two-dimensional deformation analysis,solutions are developed for the consolidation of composite ground by comprehensively considering an instantly applied load,the combined flows along both the radial and ver... |
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| Keywords: | pile foundations composite ground stone column consolidation two-dimensional elastic deformation column-soil stress ratio |
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