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

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

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

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- Contrastive experimental analysis of bearing behaviors of PHC pile and precast square piles
- Vol. 29, Issue 11, (2008)
- 作者机构：
  
  浙江大学软弱土与环境土工教育部重点实验室,杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473
- Online First：07 August 2013，
  
  Published：2008
- 稿件说明：
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ZHANG Zhong-miao, YU Jun, ZHANG Guang-xing, et al. Contrastive experimental analysis of bearing behaviors of PHC pile and precast square piles[J]. 2008, 29(11).
DOI：

ZHANG Zhong-miao, YU Jun, ZHANG Guang-xing, et al. Contrastive experimental analysis of bearing behaviors of PHC pile and precast square piles[J]. 2008, 29(11). DOI：

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。

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.

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