| 双层散体材料桩复合地基固结理论 |
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| 引用本文： | 孙举,谢新宇,谢康和.双层散体材料桩复合地基固结理论[J].岩土力学,2008,29(2):321-326. |
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| 作者姓名： | 孙举 谢新宇 谢康和 |
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| 作者单位： | 浙江大学 软弱土与环境土工教育部重点实验室, 杭州 310027 |
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| 摘 要： | 研究了考虑涂抹效应和应力集中效应的双层散体材料桩复合地基固结解析解及其工程应用，分不同情况讨论了特征根的可能变化规律，也讨论了解析解转化为双层竖井地基以及双层天然地基的普遍适用性。研究发现，固结速率随井径比的减小、水平向渗透系数比的增大和桩体刚度的增大而增加；底面排水条件对双层散体材料桩复合地基的固结影响，在井径比不是很大的情况下影响不大；是否考虑应力集中效应对计算结果影响较大。
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| 关 键 词： | 散体材料桩 双层复合地基 固结解析解 应力集中效应 涂抹效应 |
| 文章编号： | 1000-7598-（2008）02-321-06 |
| 收稿时间： | 2006-04-29 |
| 修稿时间： | 2006年4月29日 |
Analytical theory for consolidation of double-layered composite ground with granular columns |
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| SUN Ju,XIE Xin-yu,XIE Kang-he.Analytical theory for consolidation of double-layered composite ground with granular columns[J].Rock and Soil Mechanics,2008,29(2):321-326. |
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| Authors: | SUN Ju XIE Xin-yu XIE Kang-he |
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| Institution: | Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education，Zhejiang University，Hangzhou 310027, China |
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| Abstract: | This paper mainly carried out analytical theory for consolidation and its engineering performance of double-layered composite ground with granular columns considering smear effects and stress concentration effects, and discussed possible variational laws considering different cases, also with the common applicability of this analytical theory. Conclusions were made that speed of consolidation depended on drain ratio and horizontal coefficient of permeability and stiffness of pile; draining of bottom did not have efficient influence on consolidation with small drain spacing ratio, whether considering stress concentration effects or not had efficient influence on consolidation. |
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| Keywords: | granular columns double-layered composite ground smear effects analytical theory for consolidation stress concentration effects |
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