PHC管桩和预制方桩受力性状试验对比分析

›› 2008, Vol. 29 ›› Issue (11): 3059-3065.

PHC管桩和预制方桩受力性状试验对比分析

张忠苗，喻君，张广兴，王立忠

浙江大学软弱土与环境土工教育部重点实验室，杭州 310027

收稿日期:2007-03-23 出版日期:2008-11-10 发布日期:2013-08-07
作者简介:张忠苗，男，1961年生，教授，博士，主要从事基础工程与桩基础的研究、教学、检测工作
基金资助:
国家自然科学基金资助项目（No.50478080）

Contrastive experimental analysis of bearing behaviors of PHC pile and precast square piles

ZHANG Zhong-miao, YU Jun, ZHANG Guang-xing, WANG Li-zhong

Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310027, China

Received:2007-03-23 Online:2008-11-10 Published:2013-08-07

摘要/Abstract

摘要： 通过在同一场地的预应力高强混凝土管桩（PHC桩）和预制方桩中埋设钢筋应力计的静载对比试验，比较了两类桩的荷载-沉降曲线、桩身轴力分布情况、桩侧摩阻力和桩端摩阻力发挥性状的异同，研究了PHC管桩的荷载传递机制，发现其侧阻和端阻的发挥规律与预制方桩相同，但在PHC管桩和方桩侧表面积相近的条件下，在最大试验荷载作用时，两者的侧阻和端阻发挥程度不同，PHC管桩平均单位侧阻比预制方桩低8.1 %，而端阻比方桩高24 %以上。

关键词: PHC（预应力高强混凝土）管桩, 预制方桩, 荷载传递规律, 桩侧阻力, 桩端阻力

Abstract: Based on the static loading tests on pretensioned high-strength concrete (PHC pile) piles and precast square piles with strain gauges mounted in them which are in the same field, the load transfer mechanism of PHC pipe piles is studied through comparing the load-settlement curves, shaft load distribution, the behaviors of skin resistance and base resistance of two types of piles. It reveals that the behaviors of skin resistance and base resistance of PHC pipe piles is the same as those of precast square piles, however, with nearly the same side surface area, under the maximal load, the development of skin resistance and base resistance of them is different—the average skin resistance of PHC pile is 8.1 % less than the one of the precast square piles while the base resistance of PHC pipe piles is at least 24 % more than that of square piles.

Key words: PHC pipe piles, precast square piles, load transfer mechanism, skin resistance, base resistance

中图分类号:

TU 473

张忠苗，喻君，张广兴，王立忠. PHC管桩和预制方桩受力性状试验对比分析[J]. , 2008, 29(11): 3059-3065.

ZHANG Zhong-miao, YU Jun, ZHANG Guang-xing, WANG Li-zhong. Contrastive experimental analysis of bearing behaviors of PHC pile and precast square piles[J]. , 2008, 29(11): 3059-3065.

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