Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst
In order to study the influence of steep slope-karst coupling on the vertical bearing characteristics of pile foundation, the orthogonal simulation tests of pile foundation under 4 different roof thickness and 5 different slope are carried out by using Marc finite element software, and the correctio...
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2020-01-01
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doaj-efde960980384611848c46987daef5682021-04-02T13:26:15ZengEDP SciencesE3S Web of Conferences2267-12422020-01-011980201710.1051/e3sconf/202019802017e3sconf_isceg2020_02017Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and KarstFeng Zhongju0Bai Shaofen1Min Wu2He Jingbin3Huang Zhouyi4Dong YunxiuHu Haibo5Yin Jixing6School of Highway, Chang’an UniversitySchool of Highway, Chang’an UniversitySchool of Highway, Chang’an UniversitySchool of Highway, Chang’an UniversityWenshan Guangna Expressway Investment Construction Development,Company LimitedSchool of Highway, Chang’an UniversitySchool of Highway, Chang’an UniversityIn order to study the influence of steep slope-karst coupling on the vertical bearing characteristics of pile foundation, the orthogonal simulation tests of pile foundation under 4 different roof thickness and 5 different slope are carried out by using Marc finite element software, and the correction coefficient of vertical partial bearing capacity of pile foundation according to roof thickness and slope is put forward. The test results show that when the thickness of the roof is more than 3 times the pile diameter, the ultimate bearing capacity of the pile foundation tends to be stable, and the value is about 19% when the slope is 45°; the ultimate bearing capacity of the pile foundation decreases gradually with the increase of the slope, and the reduction reaches 29.83% when the slope is greater than 45°. According to the calculation results, the variation law of vertical partial bearing capacity of pile foundation is analyzed, and the calculation formula of standard value of vertical ultimate bearing capacity of pile foundation in steep slope karst area considering both roof thickness and slope is put forward, and the correction coefficients αi and β are put forward.https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/58/e3sconf_isceg2020_02017.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Feng Zhongju Bai Shaofen Min Wu He Jingbin Huang Zhouyi Dong Yunxiu Hu Haibo Yin Jixing |
spellingShingle |
Feng Zhongju Bai Shaofen Min Wu He Jingbin Huang Zhouyi Dong Yunxiu Hu Haibo Yin Jixing Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst E3S Web of Conferences |
author_facet |
Feng Zhongju Bai Shaofen Min Wu He Jingbin Huang Zhouyi Dong Yunxiu Hu Haibo Yin Jixing |
author_sort |
Feng Zhongju |
title |
Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst |
title_short |
Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst |
title_full |
Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst |
title_fullStr |
Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst |
title_full_unstemmed |
Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst |
title_sort |
calculation of ultimate bearing capacity of pile foundations of highway bridges under the coupling of steep slope and karst |
publisher |
EDP Sciences |
series |
E3S Web of Conferences |
issn |
2267-1242 |
publishDate |
2020-01-01 |
description |
In order to study the influence of steep slope-karst coupling on the vertical bearing characteristics of pile foundation, the orthogonal simulation tests of pile foundation under 4 different roof thickness and 5 different slope are carried out by using Marc finite element software, and the correction coefficient of vertical partial bearing capacity of pile foundation according to roof thickness and slope is put forward. The test results show that when the thickness of the roof is more than 3 times the pile diameter, the ultimate bearing capacity of the pile foundation tends to be stable, and the value is about 19% when the slope is 45°; the ultimate bearing capacity of the pile foundation decreases gradually with the increase of the slope, and the reduction reaches 29.83% when the slope is greater than 45°. According to the calculation results, the variation law of vertical partial bearing capacity of pile foundation is analyzed, and the calculation formula of standard value of vertical ultimate bearing capacity of pile foundation in steep slope karst area considering both roof thickness and slope is put forward, and the correction coefficients αi and β are put forward. |
url |
https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/58/e3sconf_isceg2020_02017.pdf |
work_keys_str_mv |
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