不同设盘支盘桩的水平承载性状研究  

Studies on horizontal bearing behavior of Disk-Pile with different disk settings

作　　者：卢锡雷 卢成原[2] 卢鸿凯 

机构地区：[1]浙江海天建设集团有限公司,浙江东阳322100 [2]浙江工业大学建筑工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2011年第1期51-56,共6页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(Y1080440);浙江省建设厅项目(08Z035)

摘　　要：支盘桩由于支、盘的存在扩大了水平荷载作用下桩-土的接触面积,从而也提高了其抵抗水平荷载的承载力.在均质土层中,支、盘在桩身中设置位置的不同对承受竖向压力时桩的承载力相差不大,但承受水平荷载时,支、盘在桩身中位置的不同,桩的水平承载力有明显的差异.设计了一组不同设盘位置的支盘桩和等直径桩承受水平荷载的对比试验,通过对试验数据的整理分析,比较了不同桩型的水平承载力和抗变形性能,桩身弯矩变化特点,以及桩周土体土压力变化情况.研究证明支盘桩比等直径桩具有更好的抗水平荷载能力,盘设在桩身上部比设在下部承受水平荷载的效果要好得多,同时盘的存在可以使桩身弯矩减小.因此,支盘桩是一种各向受荷效果均优于等直径桩的新桩型.Disk-Pile due to the existence of disks,the pile-soil contact area under horizontal load is expanded,thus the level of its horizontal load bearing capacity is enhanced.In homogeneous soil,the bearing capacity of piles are about the same when disks in different locations of the pile under the vertical pressure,but they are considerable difference under the horizontal load.A comparative model test on Disk-Pile with disks in different locations and equai-diameter piles under the horizontal load was designed,through the collection of test data analysis,the horizontal bearing capacity and anti-distortion performance,changes in the pile bending moment characteristics as well as the pile of soil changes in earth pressure were compared.It is proved Disk-Pile has a better anti-horizontal load capacity than diameter pile,the effect of bearing horizontal load is much better when disk in upper part of the pile than in lower part,at the same time the existence of disk can reduce the pile bending moment.Therefore,Disk-Pile is a new pile type which the effect of bearing capacity is much better than diameter pile.

关 键 词：支盘桩 水平承载力 工作性状 模型试验 

分 类 号：X131.2[环境科学与工程—环境科学]