Full-scale test study on the mechanical response of ultra-large section jacking prestressed concrete cylinder pipe (JPCCP) under axial jacking force

被引:1
作者
Zhou, Hao [1 ,2 ]
Huang, Sheng [1 ,2 ,3 ]
Ma, Baosong [1 ,2 ,3 ]
Zhang, Haifeng [4 ]
Tan, Xuhong [1 ,2 ]
Zhao, Yahong [1 ,2 ]
Ma, Peng [1 ,2 ]
Su, Xinhui [1 ,2 ]
Wei, Yingjie [1 ,2 ]
机构
[1] Sun Yat Sen Univ, Sch Civil Engn, Guangzhou 510275, Peoples R China
[2] Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China
[3] State Key Lab Tunnel Engn, Guangzhou 510275, Peoples R China
[4] Tianjin Univ, Sch Precis Instrument & Optoelect Engn, State Key Lab Precis Measurement Technol & Instrum, Tianjin 300072, Peoples R China
关键词
JPCCP; Full-scale test; Structural mechanical response; Axial deformation; Calculation model;
D O I
10.1016/j.tust.2024.106194
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Jacking prestressed concrete cylinder pipe (JPCCP) represents an innovative composite pipe technology wellsuited for water supply and drainage projects. Currently, JPCCP designs frequently reference existing prestressed concrete cylinder pipe (PCCP) and pipe jacking standards, neglecting the impact of axial jacking force on the composite structure's performance and the highly nonlinear issues encountered during the jacking process, such as concrete cracking, dislocation, and prestress loss. To thoroughly investigate the structural performance of JPCCP, this study, conducted in conjunction with the ultra-large-section JPCCP project in China, carried out axial loading tests both within the launching shaft and before entering the soil. The mechanical response of the concrete structure during the jacking process was investigated, culminating in the formulation of an axial strain calculation model for JPCCP. The results indicate that, owing to the combined effects of non-full-section eccentric compression and jacking force transmission, the axial deformation of the exterior-reinforced concrete was generally greater than that of the intermediate concrete, and the transfer of jacking force within the exterior-reinforced concrete was more pronounced. Additionally, the concrete deformation at the spigot end was marginally smaller than at the bell end, exhibiting more uniform deformation; however, abrupt changes in the cross-section at the spigot end can induce localized tensile stress areas. The discrepancies between theoretical calculations and actual test results remain within 10%, and the impact of prestress loss on different layers of concrete was inconsistent. This investigation into the structural performance and calculation model of ultra-large section JPCCP furnishes valuable insights for the design and construction of JPCCP.
引用
收藏
页数:19
相关论文
共 43 条
[1]  
[Anonymous], 2014, ANSI/AWWA C301
[2]  
[Anonymous], 2017, Prestressed Concrete Cylinder Pipe
[3]  
[Anonymous], 2014, ANSI/AWWA C304
[4]  
[Anonymous], 2017, CECS 246
[5]  
[Anonymous], 2015, Technical Specifications of Prestressed Concrete Cylinder Pipe
[6]  
Boresi A.P., 2010, Elasticity in Engineering Mechanics
[7]   Mechanical properties and loading response of prestressed concrete cylinder pipes under internal water pressure [J].
Cheng, Bingqing ;
Dou, Tiesheng ;
Xia, Shifa ;
Zhao, Lijun ;
Yang, Jinxin ;
Zhang, Qi .
ENGINEERING STRUCTURES, 2020, 216
[8]   Evaluation of Pipe-Jacking Forces Based on Direct Shear Testing of Reconstituted Tunneling Rock Spoils [J].
Choo, C. S. ;
Ong, D. E. L. .
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2015, 141 (10)
[9]   Field monitoring of mechanical parameters of deep-buried jacketed-pipes in rock: Guanjingkou water control project [J].
Deng, Zhiyun ;
Liu, Xinrong ;
Zhou, Xiaohan ;
de la Fuente, Albert ;
Han, Yafeng ;
Xiong, Fei ;
Peng, Haoyang .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2022, 125
[10]   Experimental study on the influence of scattered broken wires on the structural performance of prestressed concrete cylinder pipe [J].
Dong, Xiaonong ;
Dou, Tiesheng ;
Dong, Peng ;
Su, Yan ;
Li, Yanlong ;
Ning, Jinghua ;
Wei, Jichun ;
Li, Kangping ;
Cheng, Bingqing .
STRUCTURES, 2023, 47 :52-62