条形基础两侧双灰桩加固地基室内模型试验研究  

Laboratory Model Test on Foundation Reinforcement by Locating Flyash-lime Pile at Both Side of Strip Footing

作　　者：周戟[1] 贾仁达[1] 窦远明[1] 徐福泉[2] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]中国建筑科学研究院,北京100013

出　　处：《工程抗震与加固改造》2011年第5期64-68,63,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：国家"十一五"科技支撑计划子课题--既有村镇住宅改造关键技术研究(2006BAJ04A03)

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.

关 键 词：双灰桩 模型试验 地基加固 加固机理 

分 类 号：TU472[建筑科学—结构工程] TU317.1[建筑科学—土工工程]