液压挤扩分支/支盘桩承载性能试验研究  

Experimental Study of the Carrying Capacity of the Change Section Pile

作　　者：苑辉[1] 张延庆[1] 屈展[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《北京工业大学学报》2006年第10期879-882,共4页Journal of Beijing University of Technology

摘　　要：为了对液压挤扩支盘桩的工程特性做进一步研究,在黄河三角州地区对普通桩、支盘桩、分支桩进行了静载试验,分析了它们的极限承载力、单方混凝土承载力及桩顶荷载传递规律,结果表明：在相同地质、相同直径条件下,分支桩的极限承载力和单方混凝土极限承载力高于普通灌注桩；支盘桩的承载力和单方混凝土极限承载力高于分支桩；在荷载传递过程中,分支和支盘分担了大部分荷载,桩段只承担小部分荷载。The bearing capacity of the squeezed pile with the expanded branches is studied in this paper. Through the static loading test in Shandong province, the bearing capacity of three kinds of squeezed pile is compared. According to the stress of the reinforced bar, the force of different places＇of the pile is obtained, and the rules of the load-transfer are studied. It is deduced that the bearing capacity of the dish pile is larger than the branch piles and the general pile. In the process of the load-transfer the dish and the branches play important roles.

关 键 词：分支桩 支盘桩 静载试验 极限承载力 传递规律 

分 类 号：TU473.1[建筑科学—结构工程]