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（1 浙江大學(xué)結(jié)構(gòu)工程研究所， 杭州 310058； 2 浙江天海管樁有限公司， 杭州 310024；

3 杭州結(jié)構(gòu)與地基處理研究會(huì)， 杭州 310006）

［摘要］為了驗(yàn)證采用新型連接方式的增強(qiáng)型預(yù)應(yīng)力混凝土離心樁在濱海環(huán)境中長(zhǎng)期工作的耐久性能，對(duì)增強(qiáng)型預(yù)應(yīng)力混凝土離心樁與先張法預(yù)應(yīng)力混凝土管樁進(jìn)行加速劣化試驗(yàn)，并對(duì)劣化后的管樁進(jìn)行抗拉試驗(yàn)。結(jié)果表明：在相同的腐蝕環(huán)境和腐蝕時(shí)間下，鋼筋銹蝕引起銹脹裂縫，兩種管樁的抗拉開(kāi)裂荷載有明顯的降低，先張法預(yù)應(yīng)力混凝土管樁的抗拉承載力下降30%～53%，增強(qiáng)型預(yù)應(yīng)力混凝土離心樁的抗拉承載力下降0%~6%；先張法預(yù)應(yīng)力混凝土管樁的破壞形態(tài)為端頭連接接縫破壞，而增強(qiáng)型預(yù)應(yīng)力混凝土離心樁的破壞形態(tài)表現(xiàn)為樁身拉斷破壞。增強(qiáng)型預(yù)應(yīng)力混凝土離心樁比先張法預(yù)應(yīng)力混凝土管樁具有更好的耐久性。

［關(guān)鍵詞］預(yù)應(yīng)力混凝土離心樁； 耐久性； 加速劣化； 抗拉承載力

中圖分類號(hào)：TU528571，TU4731+3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

*杭州市科技委員會(huì)科技項(xiàng)目（20130533B13），浙江省質(zhì)量技術(shù)監(jiān)督系統(tǒng)科研計(jì)劃項(xiàng)目（20130243），杭州市科技計(jì)劃項(xiàng)目（20140533B42），杭州市青藍(lán)計(jì)劃項(xiàng)目（20131831K31）。

作者簡(jiǎn)介：岳增國(guó)，博士，副教授，Email: d05yuezengguo@zju.edu.cn。

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