Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading

In this study, the behavior of screw piles models with continuous helix was studied by conducting laboratory experimental tests on a single screw pile that has several aspect ratios (L/D) under the influence of static axial compression loads. The screw piles were inserted in a soft soil that has a u...

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Autores principales:	Karkush Mahdi O., Hussein Asaad A.
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	screw piles bearing capacity soft soil static loads porewater pressure Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/12a9bed054a04e2f90cdd4690a4076b6
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spelling	oai:doaj.org-article:12a9bed054a04e2f90cdd4690a4076b62021-11-12T11:43:50ZExperimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading2267-124210.1051/e3sconf/202131801001https://doaj.org/article/12a9bed054a04e2f90cdd4690a4076b62021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/94/e3sconf_icge2021_01001.pdfhttps://doaj.org/toc/2267-1242In this study, the behavior of screw piles models with continuous helix was studied by conducting laboratory experimental tests on a single screw pile that has several aspect ratios (L/D) under the influence of static axial compression loads. The screw piles were inserted in a soft soil that has a unit weight of 18.72 kN/m3 and moisture content of 30.19%. Also, the soil has a liquid limit of 55% and a plasticity index of 32%. A physical laboratory model was designed to investigate the ultimate compression capacity of the screw pile and measure the generated porewater pressure during the loading process. The bedding soil was prepared according to the field unit weight and moisture content and the failure load was assumed corresponding to a settlement equals 20% of helix diameter. The ultimate compression capacity of screw piles higher than the ultimate capacity of ordinary piles and the ultimate compression capacity increases with decreasing the aspect ratio. The ultimate bearing capacity of the flexible screw pile (L/D<20) is greater than the ordinary pile by 59.5% and with the rigid screw pile (L/D>20), the ultimate bearing capacity could reach 250% compared with the ordinary pile. Also, the estimated ultimate compression capacity of flexible screw piles well agreed with those measured experimentally, but a large difference was noted for rigid screw piles.Karkush Mahdi O.Hussein Asaad A.EDP Sciencesarticlescrew pilesbearing capacitysoft soilstatic loadsporewater pressureEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 318, p 01001 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	screw piles bearing capacity soft soil static loads porewater pressure Environmental sciences GE1-350
spellingShingle	screw piles bearing capacity soft soil static loads porewater pressure Environmental sciences GE1-350 Karkush Mahdi O. Hussein Asaad A. Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading
description	In this study, the behavior of screw piles models with continuous helix was studied by conducting laboratory experimental tests on a single screw pile that has several aspect ratios (L/D) under the influence of static axial compression loads. The screw piles were inserted in a soft soil that has a unit weight of 18.72 kN/m3 and moisture content of 30.19%. Also, the soil has a liquid limit of 55% and a plasticity index of 32%. A physical laboratory model was designed to investigate the ultimate compression capacity of the screw pile and measure the generated porewater pressure during the loading process. The bedding soil was prepared according to the field unit weight and moisture content and the failure load was assumed corresponding to a settlement equals 20% of helix diameter. The ultimate compression capacity of screw piles higher than the ultimate capacity of ordinary piles and the ultimate compression capacity increases with decreasing the aspect ratio. The ultimate bearing capacity of the flexible screw pile (L/D<20) is greater than the ordinary pile by 59.5% and with the rigid screw pile (L/D>20), the ultimate bearing capacity could reach 250% compared with the ordinary pile. Also, the estimated ultimate compression capacity of flexible screw piles well agreed with those measured experimentally, but a large difference was noted for rigid screw piles.
format	article
author	Karkush Mahdi O. Hussein Asaad A.
author_facet	Karkush Mahdi O. Hussein Asaad A.
author_sort	Karkush Mahdi O.
title	Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading
title_short	Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading
title_full	Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading
title_fullStr	Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading
title_full_unstemmed	Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading
title_sort	experimental investigation of bearing capacity of screw piles and excess porewater pressure in soft clay under static axial loading
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/12a9bed054a04e2f90cdd4690a4076b6
work_keys_str_mv	AT karkushmahdio experimentalinvestigationofbearingcapacityofscrewpilesandexcessporewaterpressureinsoftclayunderstaticaxialloading AT husseinasaada experimentalinvestigationofbearingcapacityofscrewpilesandexcessporewaterpressureinsoftclayunderstaticaxialloading
_version_	1718430601191620608

Experimental Investigation of Bearing Capacity of Screw Piles and Excess Porewater Pressure in Soft Clay under Static Axial Loading

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