Development and mechanical characteristics of a recyclable self-balancing detection device

DONG Jianhua; YANG Bo; TIAN Wentong; SU Shilin; LIAN Bo; LI Jianjun

doi:10.11779/CJGE2023S10002

Volume 45 Issue S1

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S1): 234-239. > DOI: 10.11779/CJGE2023S10002

DONG Jianhua, YANG Bo, TIAN Wentong, SU Shilin, LIAN Bo, LI Jianjun. Development and mechanical characteristics of a recyclable self-balancing detection device[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S1): 234-239. DOI: 10.11779/CJGE2023S10002

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Development and mechanical characteristics of a recyclable self-balancing detection device

DONG Jianhua^{1, 2,},
YANG Bo^{1, 2},
TIAN Wentong^{1, 2, 3},
SU Shilin^{1, 2},
LIAN Bo^{1, 2},
LI Jianjun⁴

1.
Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
2.
Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
3.
Key Laboratory of Loess Earthquake Engineering, Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China
4.
China Communications First Highway Engineering Group Co., Ltd., Beijing 100024, China

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Received Date: July 04, 2023
Available Online: November 23, 2023

Graphical Abstract

Abstract

Abstract

Aiming at the main problems existing in the static load tests on pile foundations, a recyclable self-balancing detection device for the bearing capacity of the pile foundations is developed. The load transfer model for the test piles under the action of a new recyclable detection structure is established, and the load transfer matrix of pile body in a layered foundation is derived. The reliability of theoretical analysis is verified by the results of three-dimensional finite element calculation in practical engineering. The working mechanism of the structure is studied based on the data of load-displacement and pile axial force obtained from the field measurements. The results show that: (1) The new structure has high assembly degree, short test period, low energy consumption and small test space requirements, and is worth popularizing. (2) The axial load-displacement curves of the pile obtained from the theoretical analytical model are in agreement with the measured results, both of which are within the allowable error range compared with those of the load box test structure. (3) The accuracy of the bearing capacity measured by the new structure is improved by 3.5%. Therefore, the theoretical model and the new structure are of great applicability and popularization value in practical engineering.
- pile foundation,
- self-balancing method,
- layered foundation,
- load transfer model

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References (23)

References

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