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Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas
Joint Authors
Ma, Tianzhong
Zhu, Yanpeng
Yang, Xiaohui
Ling, Yongqiang
Source
Mathematical Problems in Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-11-12
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
It is very necessary to research the bearing characteristics of composite pile group foundations with long and short piles under lateral load in loess areas, because these foundations are used widely.
But few people researched this problem in loess areas up to now worldwide.
In this paper, firstly, an indoor test model of a composite pile foundation with long and short piles is designed and then employed to explore the vertical load bearing characteristics and load transfer mechanisms of a single pile, a four-pile group, and a nine-pile group under different lateral loads.
Secondly, ANSYS software is employed to analyze the load-bearing characteristics of the test model, and for comparison with the experimental results.
The results demonstrate the following.
(1) The lateral force versus pile head displacement curves of the pile foundation exhibit an obvious steep drop in section, which is a typical feature of piercing damage.
A horizontal displacement limit of the pile foundation is 10 mm and 6mm for the ones sensitive to horizontal displacement.
(2) The axial force along a pile and frictional resistance do not coincide, due to significant variations and discontinuities in the collapsibility of loess; a pile body exhibits multiple neutral points.
Therefore, composite pile groups including both long and short piles could potentially maximize the bearing capacity and reduce pile settlement.
(3) The distribution of stress and strain along the pile length is mainly concentrated from the pile head to a depth of about 1/3 of the pile length.
If the lateral load is too large, short piles undergo rotation about their longitudinal axis and long piles undergo flexural deformation.
Therefore, the lateral bearing capacity mainly relies on the strength of the soil at the interface with the pile or the horizontal displacement of the pile head.
American Psychological Association (APA)
Ma, Tianzhong& Zhu, Yanpeng& Yang, Xiaohui& Ling, Yongqiang. 2018. Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-17.
https://search.emarefa.net/detail/BIM-1209169
Modern Language Association (MLA)
Ma, Tianzhong…[et al.]. Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas. Mathematical Problems in Engineering No. 2018 (2018), pp.1-17.
https://search.emarefa.net/detail/BIM-1209169
American Medical Association (AMA)
Ma, Tianzhong& Zhu, Yanpeng& Yang, Xiaohui& Ling, Yongqiang. Bearing Characteristics of Composite Pile Group Foundations with Long and Short Piles under Lateral Loading in Loess Areas. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-17.
https://search.emarefa.net/detail/BIM-1209169
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1209169