挤密效应对支盘桩承载性能影响的模型试验研究  

Model test study of influence of compaction effect on bearing capacity of disc pile

作　　者：王科元[1] 朱兴海 卢成原[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032 [2]华汇工程设计集团有限公司,浙江绍兴312000

出　　处：《浙江工业大学学报》2009年第1期53-57,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(502117)

摘　　要：介绍了新型变直径灌注桩——挤扩支盘桩和旋扩珠盘桩的工作原理,主要优缺点和施工技术要点.设计了模拟挤扩和旋扩成盘的模型试验方案并进行了一系列的模型试验,根据模型试验结果分析了新型变直径灌注桩在承载和抵抗变形方面与普通等直径桩相比的优越性,同时还比较了挤扩和旋扩这两种不同施工方法对变直径桩承载力和变形的影响,讨论了它们在荷载传递上的区别,在设计和施工时应充分注意各自的特点.This paper presents the new change diameter cast-in-place piles--the piles with plates by compaction and the piles with plates by incision, whose working principle, main advantages and disadvantages, and the construction technique points. A model test plan of simulating compaction and incision was designed and a series of model tests were carried out. According to the results of the model tests, we analyzed the advantages of the new change diameter cast-inplace piles in the loading ability and deformation compared with other ordinary equivalentdiameter piles. At the same time, compared the impacts which the two different construction ways of compaction and incision play on the loading ability and deformation of the change diameter piles; discussed their differences in load transfer. During the design and construction we should pay attention to their own characteristics.

关 键 词：挤扩支盘桩 旋扩珠盘桩 模型试验 挤密效应 

分 类 号：TU473.14[建筑科学—结构工程]