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Uplift behavior and load transfer mechanism of prestressed high-strength concrete piles

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Abstract

Prestressed high-strength-concrete (PHC) tube-shaped pile is one of the recently used foundations for soft soil. The research on uplift resistance of PHC pile is helpful to the design of pile foundations. A field-scale test program was conducted to study the uplift behavior and load transfer mechanism of PHC piles in soft soil. The pullout load tests were divided into two groups with different diameters, and there were three piles in each group. A detailed discussion of the axial load transfer and pile skin resistance distribution was also included. It is found from the tests that the uplift capacity increases with increasing the diameter of pile. When the diameter of piles increases from 500 to 600 mm, the uplift load is increased by 51.2%. According to the load-displacement (Q-S) curves, all the piles do not reach the ultimate state at the maximum load. The experimental results show that the piles still have uplift bearing capacity.

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Authors and Affiliations

  1. College of Civil Engineering, Tongji University, Shanghai, 200092, China

    Ying Lai  (赖颖) & Guo-fang Jin  (金国芳)

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  1. Ying Lai  (赖颖)
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  2. Guo-fang Jin  (金国芳)
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Correspondence to Ying Lai  (赖颖).

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Foundation item: Project(50621062) supported by the National Natural Science Foundation of China

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Lai, Y., Jin, Gf. Uplift behavior and load transfer mechanism of prestressed high-strength concrete piles. J. Cent. South Univ. Technol. 17, 136–141 (2010). https://doi.org/10.1007/s11771-010-0022-6

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  • DOI: https://doi.org/10.1007/s11771-010-0022-6

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