挤扩支盘桩承载性状与沉降特征的试验  

Experimental Study on Loading Mechanism and Settlement of Squeezed Branch Pile

作　　者：高笑娟[1] 李跃辉[1] 朱向荣[2] 甘信民 

机构地区：[1]河南科技大学建筑工程学院,河南洛阳471003 [2]浙江大学岩土工程研究所,浙江杭州310027 [3]中国石油天然气第一建设公司,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2005年第5期61-64,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省重大科技攻关资助项目(53120087)

摘　　要：通过对支盘桩的静载荷试验和对桩身轴力的测试,分析了桩在竖向荷载作用下的荷载传递机理和沉降特性,测试了桩身侧摩阻力和承力盘的端承力分担荷载的比例。指出工作荷载下支盘分担的荷载比例高于60%;桩侧摩阻力充分发挥时桩顶的沉降约为0.6%d;支盘间距3.57d没有明显影响承载力的发挥。Based on the results of static loading tests and measurement of axial forces,the load-transferring mechanism and deformation behavior of vertically loaded squeezed branch piles are investigated and discussed.The ratio of skin friction and end-capacity of disk are calculated.It is found that the expanded branches support the axial load in excess of 60% under ultimate capacity.The settlement of pile top is 0.6%d when the skin friction capacity is at its maximum value.The stress superposition efficiency between two plates is not very noticeable even when the space of the two plates is only 3.57d.

关 键 词：挤扩支盘桩 荷载传递形状 静载荷试验 侧摩阻 

分 类 号：TU473.11[建筑科学—结构工程]