Shear performance evaluation of PHC piles under different levels of axial load ratio

Oktiovan, Yopi Prabowo; Otaki, Taiga; Obara, Taku; Kôno, Susumu; Asai, Yoichi; Kobayashi, Kazuo; Watanabe, Hidekazu; Mukai, David

doi:10.1002/eqe.3655

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…A pretensioned prestressed high strength concrete pipe is called a PHC pile for short [1][2][3][4]. Its bearing capacity includes vertical bearing capacity, horizontal bearing capacity and seismic bearing capacity [5][6][7][8][9][10][11][12]. A single pile static load test is currently the most reliable method for a quality inspection of pile foundation engineering, and it is also a method that can measure the relationship between pile-soil stress and strain, and the results can be used as the basis for pile foundation engineering design [13].…”

Section: Introductionmentioning

confidence: 99%

Field Test Study on the Bearing Capacity of Extra-Long PHC Pipe Piles under Dynamic and Static Loads

Xiao¹,

Liu²,

Zhou³

et al. 2023

Sustainability

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Pretensioned prestressed high strength concrete (PHC) pipe piles are widely used in various engineering foundations, which have the advantages of high single pile bearing capacity, strong adaptability to geological conditions and high degree of construction mechanization. In order to study the vertical compressive bearing performance and settlement characteristics of ultra-long PHC pipe piles, high strain dynamic detections and static load tests were carried out on four PHC piles with a diameter of 0.9 m on site. It can be seen from the field test that the bearing capacity of the prefabricated pipe piles was time-dependent. By the end of the dynamic test, the bearing capacity of each test pile increased by 27% to 66%. The static load test also verified the rationality of the value of the restitution coefficient. Therefore, the final bearing capacity of the pile foundation can be predicted by using the high strain initial driving results and the restitution coefficient, which can reduce the repeated driving process, effectively save the cost and improve the engineering efficiency. Under 2.1 times the design load, the change range of the pile concrete modulus is from 37.5 GPa to 52 GPa, the change range of the pile side friction resistance is from 0 kPa to 97 kPa and the change range of the pile end to pile bottom load ratio is from 0% to 7.54%. During the test, the shaft friction and end bearing of the lower part of the piles were not fully mobilized. The shaft friction resistance, the end resistance and the movement behavior of the pile top and the end of the piles can provide parameter references for the subsequent design and construction of the piles.

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Section: Introductionmentioning

confidence: 99%

Field Test Study on the Bearing Capacity of Extra-Long PHC Pipe Piles under Dynamic and Static Loads

Xiao¹,

Liu²,

Zhou³

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…The traditional prestressed high-strength concrete (PHC) pipe pile has the advantages of the high bearing capacity of a single pile, wide application range, good driving resistance, and fast construction speed. At present, it has been widely used in high-rise buildings, bridges, ports, and other industries [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Research on Dynamic Pile-Driving Formula Parameters and Driving Feasibility of Extra-Long PHC Pipe Piles

et al. 2023

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Prestressed high-strength concrete (PHC) pipe pile has the advantages of high single pile bearing capacity, a wide range of applications, good driving resistance, fast construction speed, etc. It has been widely used in high-rise buildings, bridges, ports, and other industries. The application of extra-long PHC pipe piles with a length of more than 50 m is increasing. However, there are few studies on the drivability and hammering criteria of extra-long PHC piles. To analyze the drivability of extra-long piles and predict their bearing capacity, in this paper, high-strain dynamic tests were carried out on 14 test sections with the pile foundation of Temburong Bridge in Brunei as the research background. The hammer stop control criteria calculated according to the Hiley formula would lead to excessive hammering. Three types of damage occurred during construction: pile shaft breakage, weld tearing, and pile head breakage. The weight and drop height of the piling hammer selected for this project were appropriate, and the extra-long test piles can be hammered to the design depth. The values of Cp (Compression of the pile) and n (the efficiency of the blow) were fitted based on the dynamic test data, which provided a more accurate reference for the selection of subsequent piling parameters of the project. It provides a more accurate calculation method for predicting the bearing capacity of extra-long PHC piles and provides control criteria for pile stopping and a scientific basis for their design and construction.

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Study on the Flexural Performance of Prestressed Concrete Solid Square Piles and Resilient Clamping Connections

Chen

Fan

et al. 2022

KSCE J Civ Eng

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Shear performance evaluation of PHC piles under different levels of axial load ratio

Cited by 8 publications

References 14 publications

Field Test Study on the Bearing Capacity of Extra-Long PHC Pipe Piles under Dynamic and Static Loads

Field Test Study on the Bearing Capacity of Extra-Long PHC Pipe Piles under Dynamic and Static Loads

Research on Dynamic Pile-Driving Formula Parameters and Driving Feasibility of Extra-Long PHC Pipe Piles

Study on the Flexural Performance of Prestressed Concrete Solid Square Piles and Resilient Clamping Connections

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