A DESIGN METHOD FOR BEARING CAPACITY OF STEEL PIPE PILES IN CLAYEY SOIL BASED ON CONE PENETRATION TESTS

WANG Lei; YU Feng; WANG Zijun

doi:10.13204/j.gyjzG20092205

Volume 51 Issue 10

Feb. 2022

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WANG Lei, YU Feng, WANG Zijun. A DESIGN METHOD FOR BEARING CAPACITY OF STEEL PIPE PILES IN CLAYEY SOIL BASED ON CONE PENETRATION TESTS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(10): 163-169. doi: 10.13204/j.gyjzG20092205

Citation:

WANG Lei, YU Feng, WANG Zijun. A DESIGN METHOD FOR BEARING CAPACITY OF STEEL PIPE PILES IN CLAYEY SOIL BASED ON CONE PENETRATION TESTS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(10): 163-169. doi: 10.13204/j.gyjzG20092205

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A DESIGN METHOD FOR BEARING CAPACITY OF STEEL PIPE PILES IN CLAYEY SOIL BASED ON CONE PENETRATION TESTS

doi: 10.13204/j.gyjzG20092205

Institute of Foundation and Structure Technologies, Zhejiang Sci-Tech University, Zhejiang Provincial Engineering and Technology Research Center of Assembly-Concrete Industrialized Buildings, Hangzhou 310018, China

Received Date: 2020-09-22
Available Online: 2022-02-21

Abstract

Abstract

Existing bearing-capacity design methods of piles based on the cone penetration test (CPT) indices are mostly suitable for the situation of steel pipe piles in sandy soil. On the basis of existing research, a CPT-based design method for the bearing capacity of steel pipe piles in clayey soil was proposed. A index of final-plug length ratios (FLR) was introduced to consider the effect of soil plugging. Furthermore, optimization was conducted on some key issues such as stress reduction, soil-squeezed effect, deterioration of lateral resistance and influence zones at pile tips. The prediction accuracy of the recommended method was in comparison with a full-scale pile in-situ and it showed that the method was more accurate than those of existing methods. By combining the method with existing ones suitable for sandy soil, engineering calculations for the bearing capacity of steel pipe piles in natural stratified soils could be realized.
- steel pipe pile,
- cone penetration test,
- cohesive soil,
- fatigue degradation,
- influence zone of pile tip

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References(24)

References

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