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Volume 41 Issue S1
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ZHAI Ke-jie, FANG Hong-yuan, FU Bing, WANG Fu-ming, HU Ben-yue, LEI Xin-hai. CFRP wrapping to retrofit a deteriorated prestressed cylinder concrete pipe: full-scale experiments[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 157-160. DOI: 10.11779/CJGE2019S1040
Citation: ZHAI Ke-jie, FANG Hong-yuan, FU Bing, WANG Fu-ming, HU Ben-yue, LEI Xin-hai. CFRP wrapping to retrofit a deteriorated prestressed cylinder concrete pipe: full-scale experiments[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 157-160. DOI: 10.11779/CJGE2019S1040
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CFRP wrapping to retrofit a deteriorated prestressed cylinder concrete pipe: full-scale experiments

  • 1. School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China;
    2. College of Water Conservancy & Environmental Engineering, Zhengzhou University, Zhengzhou 450001, China;
    3. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    4. National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology, Zhengzhou 450001, China;
    5. Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety, Henan Province, Zhengzhou 450001, China;
    6. Zhengzhou Water Construction Project Limited by Share Ltd, Zhengzhou 450002, China

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  • Received Date: April 29, 2019
  • Published Date: July 14, 2019
    Graphical Abstract
    • Abstract
  • The prestressed concrete cylinder pipes (PCCPs) are often deteriorated due to rupture of prestressed steel wires. Such deteriorated PCCPs need to be retrofitted timely and effectively, otherwise they could suffer from explosion. An innovative retrofitting technique is therefore proposed, which is carbon fiber reinforced polymer (CFRP) wrapping outside the deteriorated PCCPs, and the retrofitting technique is especially suitable for the cases that shutting off water is impossible. In order to evaluate the effectiveness of the newly-proposed retrofitting technique for PCCPs, a full-scale PCCP of 2.8 m in inner diameter is tested under internal water pressure. The strains of PCCP structures are compared before and after the repair. It is found that the strains near the ruptured steel wires significantly decrease due to the presence of CFRP, which improves the operation of the PCCPs.
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    • References (12)
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