Ahmed Mohammed Hasan

Ahmed Mohammed Hasan
Salahaddin University - Erbil | SUH · Department of Civil Engineering

PhD

About

23
Publications
6,156
Reads
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70
Citations
Citations since 2016
16 Research Items
70 Citations
20162017201820192020202120220102030
20162017201820192020202120220102030
20162017201820192020202120220102030
20162017201820192020202120220102030
Additional affiliations
January 2012 - June 2016
University of Glasgow
Position
  • On leave of Salahaddin University - Erbil - Kurdistan - Iraq

Publications

Publications (23)
Chapter
Full-text available
This paper aims to examine the ability of conventional unsaturated stress state variables (i.e., net stress, σ¯ and suction, s) and alternative unsaturated stress state variables (i.e., Bishop's stress, σ* and modified suction, s*) in demonstrating isotropic and cross-anisotropic stiffness parameters for unsaturated soils in the formulation of stif...
Article
Full-text available
Currently, the primary source of pollution is crude oil production. It has dramatic consequences for farmlands, communities, and construction materials for earthworks. The main aims of the present study were to reduce the level of pollution, caused by oil production, in the Khurmala soil and then reuse it as a construction material. Soil remediatio...
Article
The present research aims to explore experimentally the performance and modes of failure of the wetting-induced collapse of fully penetrating reinforced and unreinforced models of a short single sand column in a collapsible soil subjected to partial inundation through a series of model tests under high constant total stress of more than 200 kPa. A...
Article
This study aims to propose four Machine Learning methods of Gaussian process regression (GPR), support vector regression (SVR), decision trees (DT), and K-nearest neighbors (KNN) to predict disc cutter’s life of TBM. 200 datasets monitored during the Alborz service tunnel construction in Iran, including TBM operational parameters, geometry, and geo...
Article
ABSTRACT A significant stage in geotechnical engineering is to establish geotechnical properties of soil models to predict the most important soil properties such as unconfined compressive strength (UCS) and compression index (Cc) because they are the main parameters in the state design of the footings, pavements, or stability assessment of existin...
Article
The focus of this research is to develop models for predicting the unconfined compressive strength and compression index (Cc) of clay soils according to Atterberg limits, natural water content, dry density, void ratio, and fine content. The soil unconfined compressive strength (UCS) ranged from 24 to 340 kPa and has been quantified with great preci...
Article
Full-text available
Measurement of shear wave velocity (Vs) plays a crucial role in ground movements around geotechnical structures such as building foundations in the urban area and tunnels. Basically, measuring Vs often requires when seismic properties of soils are essential to be calculated, such as elastic shear modulus. Multichannel analysis of surface wave (MASW...
Article
Full-text available
Soils are the most used construction materials in engineering projects, such as embankments, highways, and railways, in which huge amounts of soil are required. Unfortunately, sometimes, these soils are high expansive clay that makes problems to these projects, and at the same time, there are waste and by-product materials such as limestone powder...
Article
Full-text available
ABSTRACT Measurement of shear wave velocity (Vs) plays a crucial role in ground movements around geotechnical structures such as building foundations in the urban area and tunnels. Basically, measuring Vs often requires when seismic properties of soils are essential to be calculated, such as elastic shear modulus. Multichannel analysis of surface...
Article
Full-text available
In the analysis of soil-pile interaction under lateral load, the effect of the embedded length of a pile is an important parameter which has a significant influence on its lateral load capacity. This paper investigates the effect of embedded length of a single pile on its ultimate lateral load capacity. In this research, a 30mm steel rod pile was u...
Article
Full-text available
The processes of deposition and consolidation in natural soils or compaction in fill materials will typically produce soils that are initially cross-anisotropic (also known as transversely isotropic or orthotropic) in terms of both small strain elastic behaviour and large strain plastic behaviour. For small strain elastic behaviour, five elastic pa...
Article
Full-text available
Bender element testing of unsaturated isotropically compacted speswhite kaolin samples was used to investigate the variation of small strain elastic shear modulus G under unsaturated conditions. Testing was performed in a suction-controlled triaxial cell and involved combinations of isotropic loading and unloading stages and wetting and drying stag...
Conference Paper
Bender element testing of unsaturated isotropically compacted speswhite kaolin samples was used to investigate the variation of small strain elastic shear modulus G under unsaturated conditions. Testing was performed in a suction-controlled triaxial cell and involved combinations of isotropic loading and unloading stages and wetting and drying stag...
Conference Paper
Full-text available
Bender element testing of unsaturated isotropically compacted speswhite kaolin samples was used to investigate the variation of small strain elastic shear modulus G under unsaturated conditions. Testing was performed in a suction-controlled triaxial cell and involved combinations of isotropic loading and unloading stages and wetting and drying stag...
Thesis
The aim of this project was to investigate very small strain elastic behaviour of soils under unsaturated conditions, using ender/extender element (BEE) testing.
Conference Paper
Full-text available
: Bender/extender element testing of unsaturated compacted speswhite kaolin samples was used to investi-gate the influences of mean net stress p , suction s , specific volume v and degree of saturation Sr on shear and compression wave velocities, Vs and Vp , and hence on small strain elastic values of undrained shear modulus and undrained constrain...
Conference Paper
Full-text available
Four different interpretation procedures (involving both time and frequency domains) have been examined for measuring travel times in bender/extender element tests, used for measurement of shear and compression wave velocities and hence elastic shear mod-ulus and elastic constrained modulus, respectively. Tests were conducted on unsaturated samples...
Conference Paper
Bender element tests were performed on unsaturated kaolin samples prepared by four different types of anisotropic compaction and one type of isotropic compaction, together with a corresponding test on a saturated anisotropic reconstituted kaolin sample. Two pairs of bender elements were used in each test, both employing horizontal wave transmission...

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