（1 浙江大学结构工程研究所， 杭州 310058； 2 浙江天海管桩有限公司， 杭州 310024；

3 杭州结构与地基处理研究会， 杭州 310006）

［摘要］为了验证采用新型连接方式的增强型预应力混凝土离心桩在滨海环境中长期工作的耐久性能，对增强型预应力混凝土离心桩与先张法预应力混凝土管桩进行加速劣化试验，并对劣化后的管桩进行抗拉试验。结果表明：在相同的腐蚀环境和腐蚀时间下，钢筋锈蚀引起锈胀裂缝，两种管桩的抗拉开裂荷载有明显的降低，先张法预应力混凝土管桩的抗拉承载力下降30%～53%，增强型预应力混凝土离心桩的抗拉承载力下降0%~6%；先张法预应力混凝土管桩的破坏形态为端头连接接缝破坏，而增强型预应力混凝土离心桩的破坏形态表现为桩身拉断破坏。增强型预应力混凝土离心桩比先张法预应力混凝土管桩具有更好的耐久性。

［关键词］预应力混凝土离心桩； 耐久性； 加速劣化； 抗拉承载力

中图分类号：TU528571，TU4731+3文献标识码：A文章编号：1002-848X(2015)11-0087-04

Experimental study on tensile properties of centrifugal prestressed concrete piles

Yue Zengguo1, Qi Jinliang2 , Xia Jin1, Jin Weiliang1, Zhou Zhaodi2， Lu Dan3

(1 Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China; 2 Zhejiang Tianhai PHC Pile Co., Ltd.,

Hangzhou 310024, China； 3 Hangzhou Society of Structures and Foundations in Civil Engineering, Hangzhou 310006，China)

Abstract:To verify the durability of enhanced centrifugal prestressed concrete (T-PHC) piles using new connection in the coastal environment, accelerated deterioration tests of

 centrifugal prestressed concrete (PHC) piles and T-PHC piles were carried out and tensile tests of deteriorated piles were conducted. The results show that in the same corrosive environment and corrosion time, rust expansion crack appears due to the steel reinforcement corrosion, and the tensile crack loads of two kinds of piles decrease obviously. The tensile capacity of PHC pile  reduced by 30% to 53%, and  that T-PHC pile reduced by 0%~6%. The failure mode of PHC pile is damage of end joints, and that of  T-PHC pile is tensile failure. The T-PHC pile has better durability than PHC pile.

Keywords:centrifugal prestressed concrete pile; durability; accelerated deterioration; tensile capacity

*杭州市科技委员会科技项目（20130533B13），浙江省质量技术监督系统科研计划项目（20130243），杭州市科技计划项目（20140533B42），杭州市青蓝计划项目（20131831K31）。

作者简介：岳增国，博士，副教授，Email: d05yuezengguo@zju.edu.cn。

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