复合地基群桩相互作用机理的模型试验研究  

Model Experimental Study on Interaction of Pile-Soil-Pile in Composite Foundation

作　　者：乔京生[1] 贾开武[1] 张凤红[2] 

机构地区：[1]唐山学院土木工程系,河北唐山063000 [2]北京科技职业学院,北京102206

出　　处：《湖南科技大学学报（自然科学版）》2006年第4期57-61,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(50304012);唐山市重点实验室科技攻关项目(04362301B-41)

摘　　要：利用国内最新研制的三维大型模拟试验台——中国矿业大学(北京)的城市地下工程相似模拟试验系统,进行了3组模型试验,试验研究了群桩与单桩复合地基在应力场、位移场等方面的不同.试验结果表明,群桩复合地基桩土应力比明显高于单桩复合地基;桩侧负摩阻力高于单桩复合地基,桩侧正摩阻力低于单桩复合地基;群桩复合地基沉降高于单桩复合地基;群桩复合地基存在差异沉降.所得结论可为进一步理论研究和工程设计提供有益参考.图12,表3,参10.Interaction of pile-soil-pile is an important problem in the theory of composite foundation. Three model experiments were conducted with analog simulation experiment system of urban underground engineering in China University of Mining ＆ Technology, Beijing campus. The differences in stress fields and settlement fields between the single pile composite foundation and pile group composite foundation were studied. Results show that pile-soil stress ratio, pile negative skin friction and settlement in pile group composite foundation are higher than single pile composite foundation, pile positive skin friction is less than single pile composite foundation, differential settlement exists in pile group composite foundation. The conclusions may be useful for further theoretical studies and practical design.12figs., 3tabs., 10refs.

关 键 词：复合地基 群桩 差异沉降 模型试验 

分 类 号：TU473[建筑科学—结构工程]