Experimental and theoretical researches on horizontal bearing mechansim of single screw anchor pile

HU Wei; MENG Jian-wei; LIU Shun-kai; LONG Cheng-bi; YAO Chen; GAO Wen-hua

doi:10.11779/CJGE202001018

Volume 42 Issue 1

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Chinese Journal of Geotechnical Engineering > 2020 > 42(1): 158-167. > DOI: 10.11779/CJGE202001018

HU Wei, MENG Jian-wei, LIU Shun-kai, LONG Cheng-bi, YAO Chen, GAO Wen-hua. Experimental and theoretical researches on horizontal bearing mechansim of single screw anchor pile[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(1): 158-167. DOI: 10.11779/CJGE202001018

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Experimental and theoretical researches on horizontal bearing mechansim of single screw anchor pile

HU Wei^{1, 2,},
MENG Jian-wei^{1, 2},
LIU Shun-kai³,
LONG Cheng-bi^{1, 2},
YAO Chen^{1, 2},
GAO Wen-hua^{1, 2}

1.
Hunan Province Key Laboratory of Geotechnical Engineering Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, China
2.
School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
3.
School of Civil Engineering, Central South University, Changsha 430083, China

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Received Date: September 30, 2018
Available Online: December 07, 2022

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Abstract

Abstract

The design codes for screw anchor piles have shortcomings in calculation of the horizontal drawing capacity, and the understanding of soil pressure distribution on the anchorage surface is not unified in theoretical researches. A self-made large test sand box is used to carry out the horizontal drawing model tests on a single screw anchor pile. The soil pressures on the upper and lower surfaces of the anchor blade are directly measured to analyze the distribution rules. The displacement-related method is introduced to approximatively calculate the soil pressures, and based on the p-y curve of lateral resistance, a horizontal drawing mechanical model for the single screw anchor pile in sand is established, and the displacement-related theory is deduced to calculate the horizontal bearing capacity at last. The results show that in the horizontal drawing process, the soil pressure distribution on the surface of the anchor has non-linear relationship with the distance from the measuring point to the cental axis of the anchor, and the displacement should be considered in the calculation of soil pressures. The mechanical model and displacement-related capacity theory based on the mechanical equilibrium analysis have good effectiveness in the comparision validation. For the normally used single screw anchor pile (diameter ratio of bar to anchor d/D≤5), when the burried depth ratio is greater than 4, the horizontal capacity can be calculated according to the equal diameter naked pile directly, neglecting the effects of anchors.
- single screw anchor pile,
- horizontal drawing,
- mode test,
- soil pressure,
- bearing capacity

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References (25)

References

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