支盘桩群桩抗拔承载性状试验研究  

Experimental study on bearing capacity of the disk-pile group under uplift load

作　　者：卢成原[1] 李汉杰[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《浙江工业大学学报》2014年第3期298-301,共4页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(Y1080440)

摘　　要：设计了两组室内模型对比试验来研究多支盘桩群桩的抗拔承载性能.两组模型桩分别为等桩距的两桩群桩和四桩群桩,每组群桩又分为等直径桩群桩和双盘支盘桩群桩,以便进行对比分析.试验结果表明:支盘桩群桩的承载力远远大于等直径群桩;当群桩桩距在两倍盘径(约6.7倍桩径)时,等直径四桩群桩的承载力大约是两桩群桩的两倍,说明等直径群桩的群桩效应几乎可以忽略;而此时支盘桩群桩当桩数增加一倍时,其承载力增加小于一倍,说明其群桩效应比较明显,这从桩周土压力的变化情况可以证实.Indoor contrast model test has been designed to study the bearing capacity behavior of the disk pile group under uplift load.In order to finish comparative analysis,the model piles were divided into two sets of pile group with equal spacing pile：one with two piles and the other with four piles,and each set was divided into two groups：one is the equi-diameter-piles and the other is the disk-piles with two disks.The test results showed that：the bearing capacity of the disk-pile groups is more than that of the equi-diameterpile groups; If the spacing of the pile is twice over the diameter of plate,the bearing capacity of the equidiameter-pile group with four piles is also twice over the equi-diameter-pile group with two piles,but the same situation did not happen for the group of four piles.

关 键 词：支盘桩群桩 模型试验 上拔荷载 承载力 

分 类 号：TU473[建筑科学—结构工程]