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Research on the bearing behavior of single pile in self-weight collapsible loess areas
The negative skin frictional caused by loess collapse will decrease the bearing capacity of single pile, which is essential to the design of pile foundations in loess areas. In this study, a method for estimating the subsidence of soil layer at any depth is firstly proposed based on the total self-w...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10470878/ https://www.ncbi.nlm.nih.gov/pubmed/37651427 http://dx.doi.org/10.1371/journal.pone.0290878 |
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author | Gao, Denghui Zhao, Kuanyao Ma, Baohong Han, Zhiping Fan, Jifei |
author_facet | Gao, Denghui Zhao, Kuanyao Ma, Baohong Han, Zhiping Fan, Jifei |
author_sort | Gao, Denghui |
collection | PubMed |
description | The negative skin frictional caused by loess collapse will decrease the bearing capacity of single pile, which is essential to the design of pile foundations in loess areas. In this study, a method for estimating the subsidence of soil layer at any depth is firstly proposed based on the total self-weight collapse value. Secondly, a new load transfer constitutive model for pile-soil interface is developed, which considers the nonlinear stress-strain relationship and the ultimate shear strength of soil. Then, a load transfer calculation model for pile foundation is established, which can calculate the pile axial force, the pile skin frictional, neutral point position and the settlement of a single pile. The calculation results are compared with the test data that obtained from a pile foundation on-site immersion test and the effectiveness of the calculation method is verified well. This calculation method may be useful for designing pile foundations in collapsible loess regions. |
format | Online Article Text |
id | pubmed-10470878 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-104708782023-09-01 Research on the bearing behavior of single pile in self-weight collapsible loess areas Gao, Denghui Zhao, Kuanyao Ma, Baohong Han, Zhiping Fan, Jifei PLoS One Research Article The negative skin frictional caused by loess collapse will decrease the bearing capacity of single pile, which is essential to the design of pile foundations in loess areas. In this study, a method for estimating the subsidence of soil layer at any depth is firstly proposed based on the total self-weight collapse value. Secondly, a new load transfer constitutive model for pile-soil interface is developed, which considers the nonlinear stress-strain relationship and the ultimate shear strength of soil. Then, a load transfer calculation model for pile foundation is established, which can calculate the pile axial force, the pile skin frictional, neutral point position and the settlement of a single pile. The calculation results are compared with the test data that obtained from a pile foundation on-site immersion test and the effectiveness of the calculation method is verified well. This calculation method may be useful for designing pile foundations in collapsible loess regions. Public Library of Science 2023-08-31 /pmc/articles/PMC10470878/ /pubmed/37651427 http://dx.doi.org/10.1371/journal.pone.0290878 Text en © 2023 Gao et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Gao, Denghui Zhao, Kuanyao Ma, Baohong Han, Zhiping Fan, Jifei Research on the bearing behavior of single pile in self-weight collapsible loess areas |
title | Research on the bearing behavior of single pile in self-weight collapsible loess areas |
title_full | Research on the bearing behavior of single pile in self-weight collapsible loess areas |
title_fullStr | Research on the bearing behavior of single pile in self-weight collapsible loess areas |
title_full_unstemmed | Research on the bearing behavior of single pile in self-weight collapsible loess areas |
title_short | Research on the bearing behavior of single pile in self-weight collapsible loess areas |
title_sort | research on the bearing behavior of single pile in self-weight collapsible loess areas |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10470878/ https://www.ncbi.nlm.nih.gov/pubmed/37651427 http://dx.doi.org/10.1371/journal.pone.0290878 |
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