Engineering and Technology Journal

An Experimental and Theoretical Studies Wings Piles at Different Sandy Soil Densities

Taha K. Mahdi; Mohammed A. Al-Neami; Falah H. Raheel

Volume 40, Issue 11 , November 2022, , Page 1422-1431

https://doi.org/10.30684/etj.2022.132336.1104

Abstract

Increasing the cross-sectional area of the piles or adding wings to the piles are two strategies for increasing the bearing capacity of the piles to resist lateral stresses. Small and ... Read More ...

Effect of the Slenderness Ratio of Piles on Ultimate Lateral Resistance in Sandy Soil

Iman A. Ali; Saad F. Abbas; Karim H. Ibrahim

Volume 39, Issue 12 , December 2021, , Page 1740-1747

https://doi.org/10.30684/etj.v39i12.105

Abstract

This research presents the results of 14 tests, where the pile is subjected to static lateral loads. The tests are carried out on pile models with different length / diameter ratios ... Read More ...

Ordinary and Encased Stone Columns with Two Different Relative Densities

Namir K. S. Al-Saoudi; Mohammad M. M. Al-Kaissi; Sarah E. K. Al-Baiaty

Volume 31, Issue 13 , August 2013, , Page 2415-2432

https://doi.org/10.30684/etj.31.13A.2

Abstract

Stone columns technique is most commonly used in increasing bearing capacity, reduces and controls the compressibility and accelerates the rate of consolidation of soft saturated clay. ... Read More ...

Long -Term Deformation Of Some Gypseous Soils

Mohammed Y. Fattah; Yousif J. al-Shakarchi

Volume 26, Issue 12 , December 2008, , Page 1461-1483

https://doi.org/10.30684/etj.26.12.3

Abstract

Time-dependent deformation and stress relaxation in soils are important in a variety ofgeotechnical problems where long-term behavior is of concern.Previous studies on soils showed ... Read More ... Time-dependent deformation and stress relaxation in soils are important in a variety ofgeotechnical problems where long-term behavior is of concern.Previous studies on soils showed that the magnitude of delayed compression(creep) is controlled by compressibility and soil sensitivity in addition topreconsolidation.In this paper, the time-dependent behavior of gypseous soils is investigated. Thesoils used in this study were brought from three locations at Al-Tar region west of Al-Najaf city in Iraq. These soils had gypsum content of (66%, 44% and 14.8%). Themineralogical and chemical properties of the soils were determined.Two series of tests were performed. In the first, collapsibility characteristics wereinvestigated for a long period (60 days) by conducting single and double oedometertests. In the second series, the effect of relative density on collapse with time wasinvestigated. The samples were compacted to 40%, 50% and 60% relative density andthen tested. The results of collapse tests showed that the relationship between thestrain and logarithm of effective stress has two vertical lines. The first one representsthe collapse settlement taking place within 24 hours, while the second one representsthe long-term collapse. The collapse potential in both single and double oedometertests increases when the gypsum content increases from (14.8%) to (66%) and whenthe initial void ratio increases.The results of double oedometer tests showed that the relationship between thecollapse potential and logarithm of time, for samples loaded to 800 kPa for 60 days,consist of three distinct segments. The first segment is represented by a curve concavedownward in which the compressibility gradually increases. The second segment is astraight line with a higher increase in the strain. The third segment which refers tocreep collapse depends on the gypsum content. Gypseous soil with low gypsumcontent (14.8%) exhibited significant decrease (5.21% at 24 hours to 7.16% at 60 days)in collapse potential with time.

Keywords = Relative Density

An Experimental and Theoretical Studies Wings Piles at Different Sandy Soil Densities

Abstract

Effect of the Slenderness Ratio of Piles on Ultimate Lateral Resistance in Sandy Soil

Abstract

Ordinary and Encased Stone Columns with Two Different Relative Densities

Abstract

Long -Term Deformation Of Some Gypseous Soils

Abstract