| 双向复合地基的有限差分法分析 |
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| 引用本文： | 赵明华,龙军,张玲. 双向复合地基的有限差分法分析[J]. 湖南大学学报(自然科学版), 2009, 36(6) |
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| 作者姓名： | 赵明华 龙军 张玲 |
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| 作者单位： | 湖南大学,岩土工程研究所,湖南,长沙,410082;湖南大学,岩土工程研究所,湖南,长沙,410082;湖南大学,岩土工程研究所,湖南,长沙,410082 |
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| 基金项目： | 国家863计划资助项目 |
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| 摘 要： | 在对双向复合地基的各组成部分及工作原理进行分析的基础上,基于薄板变形的有限差分法理论和Winkler 弹性地基模型,对水平-竖直向增强体系进行合理假定,并考虑复合地基中碎石桩的双向排水作用,提出了桩土应力比随时间变化关系式以及路基工后沉降计算方法.该方法综合反映了桩土应力比随时间变化的特性以及荷载大小、网及桩间土的刚度、复合地基置换率、散体材料桩体的双向固结作用等因素对桩网复合地基的工后沉降的影响.用文中计算方法对一工程实例进行计算,验证了计算方法的可行性.
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| 关 键 词： | 有限差分法 薄板挠度 Winkler地基模型 双向固结 工后沉降 |
Finite Difference Method Analysis of Double-direction Composite Ground |
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| ZHAO Ming-hua,LONG Jun,ZHANG Ling. Finite Difference Method Analysis of Double-direction Composite Ground[J]. Journal of Hunan University(Naturnal Science), 2009, 36(6) |
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| Authors: | ZHAO Ming-hua LONG Jun ZHANG Ling |
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| Affiliation: | ZHAO Ming-hua,LONG Jun,ZHANG Ling (Institute of Geotechnical Engineering,Hunan Univ,Changsha,Hunan 410082,China) |
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| Abstract: | The composition and the work mechanism of double-direction composite ground were discussed.Based on the theory of sheet deformation and Winkler elastic foundation model and reasonably assuming the system of the vertical and horizontal reinforcement,a formula for the pile-soil stress ratio and a calculation method of the post-construction settlement were proposed,which took into account the two-direction drainage of the stone column system and the time effect of the pile-soil stress ratio.This method takes i... |
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| Keywords: | finite difference method sheet deformation Winkler foundation model two-way consolidation post-construction settlement |
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