What does this research mean for the field?

In large-diameter prestressed high-strength concrete (PHC) pipe pile groups with irregular pile caps, the pile-head load distribution follows the order of corner piles > side piles > inner piles, and their vertical bearing behavior can be accurately modeled using a combined equivalent-pier and load-transfer method. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the vertical bearing capacity, settlement, and load-transfer mechanisms of prestressed high-strength concrete pipe pile-group foundations featuring an irregular cap.

August 27, 2026BuildingsOpen Access

Experimental Study on Vertical Bearing Characteristics of Prestressed High-Strength Concrete Pipe Pile-Group Foundations

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Authors

YSYi Sun YXYunfei Xia WHWeichao He

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Overview

Field experimental study reveals non-uniform load distribution in concrete pile groups with irregular caps, highlighting improved modeling methods for bridge foundations.

Key Points

To evaluate the vertical bearing capacity, settlement, and load-transfer mechanisms of prestressed high-strength concrete pipe pile-group foundations featuring an irregular cap.
Conducted static loading tests on three single piles and an eight-pile group with a Wang-shaped irregular pile cap.
Evaluated single-pile responses using calibrated API and hyperbolic models and modeled pile-group behavior using combined equivalent-pier and load-transfer methods.
Single piles D1/D2 and D3 reached ultimate bearing capacities of 7,040 kN and 3,000 kN, respectively, whereas the pile group exhibited only 3.52 mm of settlement under a maximum applied load of 15,000 kN.
Pile-head load distribution varied systematically across the group, with corner piles carrying 13.9%, side piles carrying 12.9%, and inner piles carrying 9.4% of the total load.
Calibrated API and hyperbolic models estimated single-pile bearing capacity with prediction errors ranging from 0.23% to 3.40%.

Cite This Study

Sun et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe99110c91c1e926212cd https://doi.org/10.3390/buildings16173398

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August 27, 2026BuildingsOpen Access

Experimental Study on Vertical Bearing Characteristics of Prestressed High-Strength Concrete Pipe Pile-Group Foundations

View Full Paper

Ask AI

Bookmark

Authors

YSYi Sun YXYunfei Xia WHWeichao He

Discussion

Member takes

Overview

Field experimental study reveals non-uniform load distribution in concrete pile groups with irregular caps, highlighting improved modeling methods for bridge foundations.

Key Points

To evaluate the vertical bearing capacity, settlement, and load-transfer mechanisms of prestressed high-strength concrete pipe pile-group foundations featuring an irregular cap.
Conducted static loading tests on three single piles and an eight-pile group with a Wang-shaped irregular pile cap.
Evaluated single-pile responses using calibrated API and hyperbolic models and modeled pile-group behavior using combined equivalent-pier and load-transfer methods.
Single piles D1/D2 and D3 reached ultimate bearing capacities of 7,040 kN and 3,000 kN, respectively, whereas the pile group exhibited only 3.52 mm of settlement under a maximum applied load of 15,000 kN.
Pile-head load distribution varied systematically across the group, with corner piles carrying 13.9%, side piles carrying 12.9%, and inner piles carrying 9.4% of the total load.
Calibrated API and hyperbolic models estimated single-pile bearing capacity with prediction errors ranging from 0.23% to 3.40%.

Cite This Study

Sun et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe99110c91c1e926212cd https://doi.org/10.3390/buildings16173398

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