Study on the vertical bearing performance of pile across cave and sensitivity of three parameters

Abstract A new method was used to study the performance of pile across cave. This paper investigated the vertical bearing characteristics of piles cross caves using centrifugal model tests and a theoretical model of sensitivity. Twelve pile scenarios were selected, the first was a conventional pile,...

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Autores principales:	Hui Yun Chen, Zhong Ju Feng, Tie Li, Shao Fen Bai, Cong Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d1b51b6b709748e1b42951205c62b8b0
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spelling	oai:doaj.org-article:d1b51b6b709748e1b42951205c62b8b02021-12-02T15:27:33ZStudy on the vertical bearing performance of pile across cave and sensitivity of three parameters10.1038/s41598-021-96883-72045-2322https://doaj.org/article/d1b51b6b709748e1b42951205c62b8b02021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96883-7https://doaj.org/toc/2045-2322Abstract A new method was used to study the performance of pile across cave. This paper investigated the vertical bearing characteristics of piles cross caves using centrifugal model tests and a theoretical model of sensitivity. Twelve pile scenarios were selected, the first was a conventional pile, 24 cm long and 2.5 cm in diameter, with no karst cave as a control. In the other eleven scenarios the piles passed through karst caves of four different heights, of four different spans, and three different numbers of caves. The results reveal that increasing the height, span, and number of caves all are negative for vertical ultimate bearing capacity of piles. The axial force and unit shaft resistance of piles are great different. According to the ratios of the tip and shaft resistance, caves change the type of piles. The sensitivity of vertical ultimate bearing capacity to these factors from high to low is height, number, and span of caves. Importantly, the bearing characteristics of piles decrease faster once the height of the prototype karst cave is higher than 9 m, but decreases slowly when the cave’s span is greater than 9 m × 9 m.Hui Yun ChenZhong Ju FengTie LiShao Fen BaiCong ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hui Yun Chen Zhong Ju Feng Tie Li Shao Fen Bai Cong Zhang Study on the vertical bearing performance of pile across cave and sensitivity of three parameters
description	Abstract A new method was used to study the performance of pile across cave. This paper investigated the vertical bearing characteristics of piles cross caves using centrifugal model tests and a theoretical model of sensitivity. Twelve pile scenarios were selected, the first was a conventional pile, 24 cm long and 2.5 cm in diameter, with no karst cave as a control. In the other eleven scenarios the piles passed through karst caves of four different heights, of four different spans, and three different numbers of caves. The results reveal that increasing the height, span, and number of caves all are negative for vertical ultimate bearing capacity of piles. The axial force and unit shaft resistance of piles are great different. According to the ratios of the tip and shaft resistance, caves change the type of piles. The sensitivity of vertical ultimate bearing capacity to these factors from high to low is height, number, and span of caves. Importantly, the bearing characteristics of piles decrease faster once the height of the prototype karst cave is higher than 9 m, but decreases slowly when the cave’s span is greater than 9 m × 9 m.
format	article
author	Hui Yun Chen Zhong Ju Feng Tie Li Shao Fen Bai Cong Zhang
author_facet	Hui Yun Chen Zhong Ju Feng Tie Li Shao Fen Bai Cong Zhang
author_sort	Hui Yun Chen
title	Study on the vertical bearing performance of pile across cave and sensitivity of three parameters
title_short	Study on the vertical bearing performance of pile across cave and sensitivity of three parameters
title_full	Study on the vertical bearing performance of pile across cave and sensitivity of three parameters
title_fullStr	Study on the vertical bearing performance of pile across cave and sensitivity of three parameters
title_full_unstemmed	Study on the vertical bearing performance of pile across cave and sensitivity of three parameters
title_sort	study on the vertical bearing performance of pile across cave and sensitivity of three parameters
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d1b51b6b709748e1b42951205c62b8b0
work_keys_str_mv	AT huiyunchen studyontheverticalbearingperformanceofpileacrosscaveandsensitivityofthreeparameters AT zhongjufeng studyontheverticalbearingperformanceofpileacrosscaveandsensitivityofthreeparameters AT tieli studyontheverticalbearingperformanceofpileacrosscaveandsensitivityofthreeparameters AT shaofenbai studyontheverticalbearingperformanceofpileacrosscaveandsensitivityofthreeparameters AT congzhang studyontheverticalbearingperformanceofpileacrosscaveandsensitivityofthreeparameters
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Study on the vertical bearing performance of pile across cave and sensitivity of three parameters

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