Ultimate Bearing Characteristics and Envelope Analysis of the Composite Caisson Foundation with a Single Pile in Combined Loading Modes

ZHANG Xu

doi:10.13204/j.gyjzG21022506

Volume 52 Issue 5

Jul. 2022

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ZHANG Xu. Ultimate Bearing Characteristics and Envelope Analysis of the Composite Caisson Foundation with a Single Pile in Combined Loading Modes[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 187-193. doi: 10.13204/j.gyjzG21022506

Citation:

ZHANG Xu. Ultimate Bearing Characteristics and Envelope Analysis of the Composite Caisson Foundation with a Single Pile in Combined Loading Modes[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 187-193. doi: 10.13204/j.gyjzG21022506

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Ultimate Bearing Characteristics and Envelope Analysis of the Composite Caisson Foundation with a Single Pile in Combined Loading Modes

doi: 10.13204/j.gyjzG21022506

ZHANG Xu^1,2

1. Sino-Portuguese Centre for New Energy Technologies (Shanghai) Co., Ltd., Shanghai 200335, China;
2. Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China

Received Date: 2021-02-25
Available Online: 2022-07-23
Publish Date: 2022-07-23

Abstract

Abstract

It is an important way to evaluate the stability of foundation that establishs the envelope of bearing capacity for foundation in different loading modes by means of numerical analysis and tests. According to the engineering geological conditions, a three-dimensional large-scale numerical model of the suction-caisson and foundation by the finite element method was constructed. The deformation and bearing capacity of the caisson foundation under horizontal loads, vertical loads and bending moment were calculated. The results showed that with the gradual increase of loads, the displacement of the composite caisson foundation increased linearly at the initial stage, increased exponentially at the later stage, and became unstable at last. An appropriate vertical load was beneficial to improve the horizontal and flexural bearing capacity of the composite caisson foundation, while an excessively large vertical load was unfavorable to the stability of the foundation. The failure envelope of the caisson foundation played an important role in structural design, foundation stability judgment and overall safety evaluation.
- load mode,
- caisson foundation,
- bearing characteristics,
- envelope

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References(12)

References

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