Application of Carbon-Fiber Composite Material in Micropile Structure
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 2
Abstract
The flexural capacity of a single micropile is small, and some additional materials need to be built into the steel pipe to increase the flexural and tensile capacity of the structure. This paper introduced a new type of carbon-fiber micropile structure, and through comparison with a traditional micropile structure with ordinary steel, the carbon-fiber micropile structure is recommended. The results show that under the same geological and load conditions, the maximum pile top displacement of the carbon-fiber composite micropile decreased by 24% compared with that of ordinary micropiles. In addition, the displacement distribution of different pile positions showed that the stress and deformation of the carbon-fiber micropile are more coordinated and the resistance to soil displacement is improved. The maximum internal stress of the carbon-fiber composite micropiles was 1.53 times that of common-material micropiles, a relative increase of 53%, and the stress intensity of the piles was significantly improved. In terms of maximum shear stress, the maximum shear stress of the carbon-fiber composite at the squeezed end of the soil was 1.6 times that of the ordinary steel pipe pile, and the local shear resistance of the pile was improved under the premise of ensuring no brittle fracture.
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Acknowledgments
This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. 2017YJS140) and the National Natural Science Foundation of China (Grant No. 41672339). The authors express their gratitude to the editors and reviewers for their constructive and helpful review comments.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 2 • April 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jul 18, 2018
Accepted: Jun 11, 2019
Published online: Feb 12, 2020
Published in print: Apr 1, 2020
Discussion open until: Jul 12, 2020
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