条形基础两侧双灰桩加固地基室内模型试验研究
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摘要
以相似理论为指导,进行了在条形基础两侧设置双灰桩加固地基的室内模型试验,研究了加固后地基的承载力、沉降随荷载变化规律、地基应力的大小及分布规律,分析了该加固技术的承载机理、加固机理和加固效果。试验结果表明,双灰桩可以有效地提高地基承载能力,减小地基沉降量;双灰桩使地基中的应力不易向桩外土扩散,并能使地基应力向更深处扩散。
Using similarity theory as guidance,the laboratory model test on foundation reinforcement by locating flyash-lime pile at both side of strip footing is carried out,and foundation bearing capacity,p-s curve,the magnitude and distribution discipline of the foundation stress before and after reinforcement are researched,and the load-bearing mechanism,strengthening mechanism and reinforcement effect of the strengthening technology are analyzed.The results show that the flyash-lime pile can effectively improve the foundation bearing capacity,and reduce the amount of ground settlement;under the role of the flyash-lime pile,the stress spreads lesser to the outside of pile in the ground,and it causes the foundation stress to the deeper place.
Using similarity theory as guidance,the laboratory model test on foundation reinforcement by locating flyash-lime pile at both side of strip footing is carried out,and foundation bearing capacity,p-s curve,the magnitude and distribution discipline of the foundation stress before and after reinforcement are researched,and the load-bearing mechanism,strengthening mechanism and reinforcement effect of the strengthening technology are analyzed.The results show that the flyash-lime pile can effectively improve the foundation bearing capacity,and reduce the amount of ground settlement;under the role of the flyash-lime pile,the stress spreads lesser to the outside of pile in the ground,and it causes the foundation stress to the deeper place.
引文
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[7]Jean Salencon.The influence of confinement on thebearing capacity of strip footings[J].C.R.Mecanique,2002:521～525
[8]李洋溢.条形基础加筋砂土地基室内模型试验的分析研究[D].上海:同济大学,2006Li Yang-yi.The Study of Model Tests of StripFoundation on the Reinforced Sand Subgrade[D].Shanghai:Tongji University,2006(in Chinese)
[9]王伟堂,等.石灰桩加固软弱地基试验研究[J].岩土工程学报,1987,9(1):72～82Wang Wei-tang,et al.Experimental Study on QuicklimePile for Stabilizing Soft Foundation[J].Chinese Jounalof Geotechnical Engineering,1987,9(1):72～82(inChinese)
[10]JGJ 79-2002,建筑地基处理技术规范[S]JGJ 79-2002,Technical Code for Ground Treatment ofBuildings[S](in Chinese)
[11]GB 50007-2002,建筑地基基础设计规范[S]GB 50007-2002,Code for Design of Building Foundation[S](in Chinese)
[2]谢征勋.建筑工程事故分析及方案论证[M].北京:地震出版社,1996Xie Zheng-xun.Architectural Engineering AccidentAnalysis and Scheme Comparison[M].Beijing:ChinaSeismological Press,1996(in Chinese)
[3]叶书麟.地基处理与托换技术(第三版)[M].北京:中国建筑工业出版社,2005Ye Shu-lin.Foundation Treatment and UnderpinningTechnology[M].Beijing:China Architecture andBuilding Press,2005(in Chinese)
[4]张永钧.既有建筑地基基础加固工程实例手册[M].北京:中国建筑工业出版社,2002Zhang Yong-jun.Engineering Example Manual ofEstablished Building Foundation Reinforcement[M].Beijing:China Architecture and Building Press,2005(inChinese)
[5]Rnadolph M F,Carter,et al.Driven piles in clay—theeffects of installation and subsequent consolidation[J].Geotechnique,1979,29(4)
[6]Vemra B P and Char A N R.Bearing capacity tests onreinforced sand subgrade[J].Joural of GeotechnicalEngineering,ASCE,1986,112:701～706
[7]Jean Salencon.The influence of confinement on thebearing capacity of strip footings[J].C.R.Mecanique,2002:521～525
[8]李洋溢.条形基础加筋砂土地基室内模型试验的分析研究[D].上海:同济大学,2006Li Yang-yi.The Study of Model Tests of StripFoundation on the Reinforced Sand Subgrade[D].Shanghai:Tongji University,2006(in Chinese)
[9]王伟堂,等.石灰桩加固软弱地基试验研究[J].岩土工程学报,1987,9(1):72～82Wang Wei-tang,et al.Experimental Study on QuicklimePile for Stabilizing Soft Foundation[J].Chinese Jounalof Geotechnical Engineering,1987,9(1):72～82(inChinese)
[10]JGJ 79-2002,建筑地基处理技术规范[S]JGJ 79-2002,Technical Code for Ground Treatment ofBuildings[S](in Chinese)
[11]GB 50007-2002,建筑地基基础设计规范[S]GB 50007-2002,Code for Design of Building Foundation[S](in Chinese)
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