Browsing by Author "Khabbaz Hadi"

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Browsing by Author "Khabbaz Hadi"

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  • Analysis of Matric Suction Effects Induced by Tree Roots on Rail Track Subgrade 
    Fatahi Behzad; Khabbaz Hadi; Indraratna Buddhima (RTSA, 2008)
    This study investigates the eflects of vegetation on soil matric suction and ground deformation. This paper highlights the inter-related parameters contributing to the development of a conceptual evapo-transpiration and ...
  • Analyzing Soft Ground Improvement Caused by Tree Root Suction 
    Fatahi Behzad; Indraratna Buddhima; Khabbaz Hadi (American Society of Civil Engineers (ASCE), 2007)
    Bioengineering aspects of native vegetation are currently being evolved to improve soil stiffness, slope stabilisation, and erosion control. Vegetation contributes to weak soil stabilisation through reinforcement of the ...
  • Application Of Vertical Reinforcement For Performance Enhancement Of Reinforced Soil Under Seismic Loading 
    Shrestha Binod; Khabbaz Hadi (Omnipress/Missouri University of Science and Technology, 2010)
    Reinforced soils have been widely used in geotechnical structures as a result of their satisfactory performance and cost effectiveness. A number of investigations have been carried out to find out the seismic deformation ...
  • Bioengineering ground improvement considering root water uptake model 
    Fatahi Behzad; Khabbaz Hadi; Indraratna Buddhima (Elsevier BV, 2010)
    Bioengineering features of native vegetation are currently being evolved to enhance soil stiffness, slope stabilisation and erosion control. The effects of tree roots on soil moisture content and ground settlement are ...
  • Conceptual Development and Numerical Modelling of Vegetation Induced Suction and implications on Rail Track Stabilisation 
    Indraratna Buddhima; Khabbaz Hadi; Fatahi Behzad (Indian Institute of Technology, Bombay, 2008)
    The effects of tree roots on soil suction and ground settlement are investigated. This paper highlights the inter-related parameters contributing to the development of a conceptual evapo-transpiration and root water uptake ...
  • Constriction-Based Retention Criterion for Granular Filter Design 
    Indraratna Buddhima; Raut Ashok; Khabbaz Hadi (American Society of Civil Engineers, 2007)
    The filter design criteria in practice are currently based on laboratory tests that were carried out on uniform base soil and filter materials. These criteria mostly involve specific particle size ratios, where the system ...
  • A critical review on granular dam filter behaviour -- from particle sizes to constriction-based design criteria 
    Indraratna Buddhima; Trani Laricar; Khabbaz Hadi (Taylor & Francis Ltd., 2008)
    Over emphasis on tests results involving base soils with increasing coefficient of uniformity (Cu) makes the reliability of an empirical particle-based criterion for effective filters questionable. Extra measures such as ...
  • Development of a Smart Tool for Capturing Novel Advancement in Ballasted Rail Track Substructure 
    Khabbaz Hadi; Indraratna Buddhima (Department Of Civil And Environmental Engineering Of Shiraz University, 2009)
    The obligation of keeping a competitive edge against other means of transportation has increased the pressure on the railway industry to improve its efficiency and decrease the maintenance costs. In this paper, several ...
  • Effect Of Fly Ash Performance Of Pervious Concrete 
    Aoki Yukari; Sri Ravindrarajah Rasiah; Khabbaz Hadi (ACI International Conference, 2009)
    Production of good quality pervious concrete is necessary to meet specification requirements for the construction of durable concrete pervious pavements. This paper reports and discusses the results of an experimental ...
  • Effects Of Salinity And Sand Content On Liquid Limit And Hydraulic Conductivity 
    Fatahi Behzad; Khabbaz Hadi; Basack Sudip (Australian Geomechanics Society, 2011)
    Soil conditions of construction sites have become worse than ever due to the overpopUlation in the metropolitan areas throughout the world. Likewise, the prevention of environmental risks due to individual activities is ...
  • Enhanced numerical analysis of ground behaviour influenced by tree root suction 
    Fatahi Behzad; Indraratna Buddhima; Khabbaz Hadi (Coffey Geotechnics, 2007)
    Tree roots provide three stabilising functions: (a) reinforcement of the soil, (b) dissipation of excess pore pressures, (c) establishing sufficient matric suction to increase the shear strength. This paper looks at the ...
  • Enhancement of Ballasted Rail Track Performance Using Geosynthetics 
    Fatahi Behzad; Khabbaz Hadi (ASCE, 2011)
    The requirement of keeping a competitive edge against other means of transportation has increased the pressure on the railway industry to improve its efficiency and decrease the maintenance costs. In this paper, several ...
  • Environmentally friendly sustainable pervious concrete 
    Aoki Yukari; Sri Ravindrarajah Rasiah; Khabbaz Hadi (Taylor & Francis Group, 2009)
    Portland cement is considered as one of the environmentally unfriendly materials due to its contribution to the increased liberation of carbon dioxide to the enviromnent during production. In addition to its impervious ...
  • Experimental Evaluation of Seismic Deformation Characteristics of Vertical-Horizontal Reinforced Soil Walls 
    Shrestha Binod; Khabbaz Hadi; Fatahi Behzad (Curtin University, 2011)
    Reinforced soils have been widely used in different construction applications including retaining walls. The performance of retaining walls employing vertical reinforcement in conjunction with horizontal reinforcement is ...
  • Finite Element Methods against Limit Equilibrium Approaches for Slope Stability Analysis 
    Khabbaz Hadi; Fatahi Behzad; Nucifora C (Geomechanical Society and New Zealand Geotechnical Society, 2012)
    A number of powerful numerical models, including limit equilibrium and finite element (FE) methods, have been developed for slope stability analysis in recent decades. The limit equilibrium method contains several limitations, ...
  • Finite Element Modelling of Soil-Vegetation Interaction 
    Indraratna Buddhima; Fatahi Behzad; Khabbaz Hadi (Springer VB, 2007)
    Behaviour of soils in the vadose zone is closely linked to water balance between ground and atmosphere. It seems that transpiration is the most uncertain and difficult to evaluate of all the terms in the soil water balance. ...
  • Geotechnical Properties of Ballast and the Role of Geosynthetics 
    Indraratna Buddhima; Khabbaz Hadi; Salim W; Christie D (Leon Heward-Mills, Thomas Telford Ltd., 2006)
    The ballast and its engineering behaviour have a key role in governing the stability and performance of railway tracks. The deformation and degradation behaviour of ballast under static and dynamic loads was studied based ...
  • Investigating Erosional Behaviour of Chemically Stabilised Erodible Soils 
    Indraratna Buddhima; Muttuvel Thevaragavan; Khabbaz Hadi (ASCE, 2008)
    Chemical stabilisation is a popular technique to improve the erosion resistance of soils. In this study, two chemical stabilisers, namely lignosulfonate and general purpose Portland cement were tested on two different ...
  • Mechanical characteristics of soft clay treated with fibre and cement 
    Fatahi Behzad; Khabbaz Hadi; Fatahi Behnam (I C E Publishing, 2012)
    In this study, the influence of three types of fibre; polypropylene, recycled carpet and steel, on the mechanical properties of cement-treated clay is investigated. Cement-treated clay specimens were prepared with cement ...
  • Methods for Estimating Internal Erosion in Embankment Dams 
    Khan Azam; Khan Ehsan; Nasir A; Khabbaz Hadi (Pakistan Geotechnical Engineering Society (PGES), 2010)
    Historical data shows that piping failure is one of the most common modes of failure in dams. To evaluate the safety of dams it is necessary to estimate the internal erosion rate based on precise geotechnical and soil ...