EXPERIMENTAL STUDY ON THE PRESTRESS IN MANUFACTURING OF LARGE-DIAMETER PHC PIPE PILES

Hu Ruolin; Su Linwang; Lin Meihong

doi:10.13204/j.gyjz201306019

Volume 43 Issue 6

Dec. 2014

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Hu Ruolin, Su Linwang, Lin Meihong. EXPERIMENTAL STUDY ON THE PRESTRESS IN MANUFACTURING OF LARGE-DIAMETER PHC PIPE PILES[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(6): 90-94,116. doi: 10.13204/j.gyjz201306019

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EXPERIMENTAL STUDY ON THE PRESTRESS IN MANUFACTURING OF LARGE-DIAMETER PHC PIPE PILES

doi: 10.13204/j.gyjz201306019

Hu Ruolin^1,2,3,
Su Linwang^1,2,3,
Lin Meihong^1,2,3

1.
1. Engineering Technology Research Institute of CCCC Forth Harbor Engineering Bureau,Guangzhou 510288,China;
2.
2. Key Laboratory of Harbor and Marine Structure Durability Technology of Ministry of Communications,Guangzhou 510230,China;
3.
3. Port Engineering Technology Research and Development Center of Guangdong Province,Guangzhou 510230,China

Received Date: 2012-10-20
Publish Date: 2013-06-20

Abstract

Abstract

The effective compressive stress and prestress loss in manufacture and curing of larger-diameter prestressed high concrete(PHC) pipe piles were studied by a field experiment performanced for two pipes of PHC with 1 400 mm diameter and different lengths.Pasting the strain gauges on prestresed steel bars directly was used for testing the prestress for the first time, and the designed prestress and the distribution of different section in different manufacture stage were compared with the experimental results.The results showed that tensile stress of prestressed steel bar was a linear decreasing trend form tension section to anchor section after forming by centrifugal technics;the effective tensile stress of prestressed steel bar and the effective compressive stress of concrete in two pipes were much lower than the theoretical data.The loss of prestress of PHC pipe piles was much greater during releasing tension than during other process.the prestress distribution of each section was not uniform but the midsection was much better which had a increasing trend with time growth.
- PHC pipe pile,
- effective compressive stress,
- loss of prestress,
- strain gauge

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References(9)

References

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汪舟红,袁静波,林志宇.PHC 管桩在外海桥梁中的应用[J].水运工程,2009(2):23－25.

[3] 严志隆．关于 PHC 管桩的张拉控制应力、预应力损失和有效预应力问题[C]∥高强与高性能混凝土及其应用第五届学术讨论会论文集．2004.

[4] 黄绍江,严志隆．关于 PHC 管桩的预应力损失和有效预应力问题[J].混凝土与水泥制品,2004(2):26－28.

[5] 谢丽丽,冯辉,刘立新,等．先张法预应力混凝土梁钢绞线预应力传递长度的试验研究[J].建筑科学,2007,23(5):34－37.

[6] 刘立新,刘中琦．螺旋肋钢丝(PC 棒)预应力传递长度的试验研究[J].郑州大学学报:工学版,2009,30(4):11－14.

[7] 吴锋,邱松,卓杨,等.PHC 管桩预应力传递性能试验研究[J].混凝土与水泥制品,2010(3):35－37.

[8] 王清湘,牟晓光,司炳君,等．三种预应力钢筋黏结性能试验研究[J].大连理工大学学报,2004,44(6):848－853.

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