Performance of Under-Reamed Piles in Collapsible Soil

One of the Iraqi geotechnical problems is the presence of gypseous soils covering about (27-36) percentage of Iraq soils containing gypsum between (10-70) ratios. The main reason for soil problematic is the gypsum dissolution when these soils are inundated. However, the soluble gypsum can be leached...

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Autores principales:	Mahdi Hayder A., Mohialdeen Omar k., Jihad Amer G.
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	under-reamed pile static load gypseous soil Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/8e85c7a045664501a50dcc5a70788cd6
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id	oai:doaj.org-article:8e85c7a045664501a50dcc5a70788cd6
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spelling	oai:doaj.org-article:8e85c7a045664501a50dcc5a70788cd62021-11-12T11:43:50ZPerformance of Under-Reamed Piles in Collapsible Soil2267-124210.1051/e3sconf/202131801015https://doaj.org/article/8e85c7a045664501a50dcc5a70788cd62021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/94/e3sconf_icge2021_01015.pdfhttps://doaj.org/toc/2267-1242One of the Iraqi geotechnical problems is the presence of gypseous soils covering about (27-36) percentage of Iraq soils containing gypsum between (10-70) ratios. The main reason for soil problematic is the gypsum dissolution when these soils are inundated. However, the soluble gypsum can be leached out of the soil particles, so these problems can be led to cracking, tilting, and collapsing the related soil structure and changing the soil properties. The aim of this work is to investigate the performance of under-reamed piles as a new, improved method to reduce the moisture sensitive and the primary triggering mechanism for the volume reduction of collapsible soil, which is considered as a non-elastic deformation; this was done by carrying series of inundation these soil with using different types of under reamed piles to arrive the best and suitable type useful in gypseous soils. The piles with reams are concrete piles with one or more ream, so under-reamed piles are suitable in weak soils where sizable ground movement, variations, filed up ground, silty clay, and loose sand which has the advantage to increase the soil strength. This paper includes the experimental model of under-reamed piles under static load simulated by a steel plate on the pile cap, then the load-settlement curve, friction force, and bearing force founded from the investigation of different patterns of reamed. It was found that a number of bulbs had a significant reduction on settlement reach to 93% in case of using triple under-reamed pile which is the greatest results in comparison with other patterns and reference pile of the uniform cross-section in the wet state.Mahdi Hayder A.Mohialdeen Omar k.Jihad Amer G.EDP Sciencesarticleunder-reamed pilestatic loadgypseous soilEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 318, p 01015 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	under-reamed pile static load gypseous soil Environmental sciences GE1-350
spellingShingle	under-reamed pile static load gypseous soil Environmental sciences GE1-350 Mahdi Hayder A. Mohialdeen Omar k. Jihad Amer G. Performance of Under-Reamed Piles in Collapsible Soil
description	One of the Iraqi geotechnical problems is the presence of gypseous soils covering about (27-36) percentage of Iraq soils containing gypsum between (10-70) ratios. The main reason for soil problematic is the gypsum dissolution when these soils are inundated. However, the soluble gypsum can be leached out of the soil particles, so these problems can be led to cracking, tilting, and collapsing the related soil structure and changing the soil properties. The aim of this work is to investigate the performance of under-reamed piles as a new, improved method to reduce the moisture sensitive and the primary triggering mechanism for the volume reduction of collapsible soil, which is considered as a non-elastic deformation; this was done by carrying series of inundation these soil with using different types of under reamed piles to arrive the best and suitable type useful in gypseous soils. The piles with reams are concrete piles with one or more ream, so under-reamed piles are suitable in weak soils where sizable ground movement, variations, filed up ground, silty clay, and loose sand which has the advantage to increase the soil strength. This paper includes the experimental model of under-reamed piles under static load simulated by a steel plate on the pile cap, then the load-settlement curve, friction force, and bearing force founded from the investigation of different patterns of reamed. It was found that a number of bulbs had a significant reduction on settlement reach to 93% in case of using triple under-reamed pile which is the greatest results in comparison with other patterns and reference pile of the uniform cross-section in the wet state.
format	article
author	Mahdi Hayder A. Mohialdeen Omar k. Jihad Amer G.
author_facet	Mahdi Hayder A. Mohialdeen Omar k. Jihad Amer G.
author_sort	Mahdi Hayder A.
title	Performance of Under-Reamed Piles in Collapsible Soil
title_short	Performance of Under-Reamed Piles in Collapsible Soil
title_full	Performance of Under-Reamed Piles in Collapsible Soil
title_fullStr	Performance of Under-Reamed Piles in Collapsible Soil
title_full_unstemmed	Performance of Under-Reamed Piles in Collapsible Soil
title_sort	performance of under-reamed piles in collapsible soil
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/8e85c7a045664501a50dcc5a70788cd6
work_keys_str_mv	AT mahdihaydera performanceofunderreamedpilesincollapsiblesoil AT mohialdeenomark performanceofunderreamedpilesincollapsiblesoil AT jihadamerg performanceofunderreamedpilesincollapsiblesoil
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Performance of Under-Reamed Piles in Collapsible Soil

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