Articles

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Analytical and Numerical Modelling of Consolidation by Sand Drains beneath a Circular Embankment (with A. Aljorany and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2008)
: In the analysis of axisymmetric problems, it is often imperative that aspects of geometry,...
 

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2D and 3D Numerical Modeling of Combined Surcharge and Vacuum Preloading with Vertical Drains (with C. Rujikiatkamjorn and J. Chu), Faculty of Engineering - Papers (2008)
This paper presents a three-dimensional (3D) and two-dimensional (2D) numerical analysis of a case study...
 

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Laboratory Modeling of Consolidation Behavior of Soft Clays Using Vacuum-Surcharge Consolidation Method (with C. Rujikiatkamjorn and M. Sakr), Faculty of Engineering - Papers (2008)
In this study, the large-scale apparatus used to examine vacuum preloading in conjunction with conventional...
 

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Shear strength model for overconsolidated clay-infilled idealised rock joints (with M. Jayanathan and T. Brown), Faculty of Engineering - Papers (2008)
Saturated infilled joints can contribute to the instability of rock masses during undrained shearing. This...
 

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Recent advancements in the use of prefabricated vertical drains in soft soils., Faculty of Engineering - Papers (2008)
A system of prefabricated vertical drains with surcharge load to accelerate consolidation by shortening the...
 

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Soft ground improvement by vacuum-assisted preloading (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
This paper describes the behaviour of soft soil foundation stabilized with vacuum-assisted preloading at the...
 

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Stabilisation of granular media and formation soil using geosynthetics with special reference to railway engineering (with M. A. Shahin and W. Salim), Faculty of Engineering - Papers (2007)
Railway ballast breaks down and deteriorates progressively under train cyclic loading, and soft formation soil...
 

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Effect of confining pressure on ballast degradation and deformation under cyclic triaxial loading (with J. Lackenby, G. McDowell, and D. Christie), Faculty of Engineering - Papers (2007)
Traditional railway foundations or substructures have become increasingly overloaded in recent years, owing to the...
 

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Numerical modelling of soft soil stabilized by vertical drains, combining surcharge and vacuum preloading for a storage yard (with C. Rujikiatkamjorn and C. Jian), Faculty of Engineering - Papers (2007)
This paper presents a finite element analysis of a case study of a combined vacuum...
 

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Analytical solutions and design curves for vacuum-assisted consolidation with both vertical and horizontal drainage (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
A system of vertical drains combined with vacuum preloading is an effective method for promoting...
 

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DEM analysis of angular ballast breakage under cyclic loading (with Z. Hossain, F. Darve, and P. Thakur), Faculty of Engineering - Papers (2007)
Railway ballast particles undergo significant amount of breakage under repeated train load. Breakage of ballast...
 

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Constriction-Based Retention Criterion for Granular Filter Design (with A. K. Raut and H. Khabbaz), Faculty of Engineering - Papers (2007)
The filter design criteria in practice are currently based on laboratory tests that were carried...
 

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Enhanced Criterion for Base Soil Retention in Embankment Dam Filters (with A. K. Raut), Faculty of Engineering - Papers (2006)
In effective filters, potentially erodible base particles are transported to the filter and retained to...
 

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Installation of a lime injection barrier for the remediation of acid sulphate soil problems (with A. N. Golab and L. J. Banasiak), Faculty of Engineering - Papers (2006)
Oxidation of naturally occurring pyrite (FeS2) in certain low-lying clayey soils generates sulphuric acid, hence...
 

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Geotechnical properties of ballast and the role of geosynthetics in rail track stabilisation (with H. Khabbaz, W. Salim, and D. Christie), Faculty of Engineering - Papers (2006)
The ballast and its engineering behaviour have a key role in governing the stability and...
 

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Reply to the discussion by Tran and Mitachi on “Analytical and Numerical Solutions for a Single Vertical Drain including the Effects of Vacuum Preloading" (with C. Rujikiatkamjorn and I. Sathananthan), Faculty of Engineering - Papers (2006)
The writers are grateful for the interest and the feedback provided by the discussers. Responses...
 

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Laboratory Evaluation of Smear Zone and Correlation between Permeability and Moisture Content (with I. Sathananthan), Faculty of Engineering - Papers (2006)
In this study, the extent of the smear zone and the reduction of permeability and...
 

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Vertical Drain Consolidation with Parabolic Distribution of Permeability in Smear Zone (with R. Walker), Faculty of Engineering - Papers (2006)
A vertical drain radial consolidation equation based on a parabolic reduction in permeability toward the...
 

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Acid sulphate soil remediation techniques on the Shoalhaven River Floodplain, Australia (with A. N. Golab, W. Glamore, and B. Blunden), Faculty of Engineering - Papers (2006)
A commonly used flood mitigation technique in coastal areas of Australia during the late 1960’s...
 

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Selection of potential reactive materials for a permeable reactive barrier for remediating acidic groundwater in acid sulphate soil terrains (with A. N. Golab and M. A. Peterson), Faculty of Engineering - Papers (2006)
A permeable reactive barrier is being designed to remediate leachate from acid sulphate soils. The...
 

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Numerical analysis of matric suction effects of tree roots (with B. Fatahi and H. Khabbaz), Faculty of Engineering - Papers (2006)
The use of native vegetation in the coastal regions of Australia has become increasingly popular...
 

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Predictions and Performances of Prefabricated Vertical Drain Stabilised Soft Clay Foundations (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
In this paper, the analytical solution for radial consolidation of soft soils is proposed considering...
 

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Measurement of pore water pressure of clay-infilled rock joints during triaxial shearing (with J. Mylvaganam), Faculty of Engineering - Papers (2005)
Joints existing within a rock mass are normally filled with fine materials such as clay...
 

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Development of an Equivalent Homogenous Fluid Model for Pseudo-Two-Phase (Air+Water) Flow through Fractured Rock (with J. Price), Faculty of Engineering - Papers (2005)
Fracture flow of two-phase mixtures is particularly applicable to the coal mining and coal bed...
 

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Addressing the Geotechnical Challenges Posed by Soft Clays, Faculty of Engineering - Papers (2005)
[Extract] This Special Issue of the Int. J. Geomech. on soft clay engineering and soft...
 

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Analytical and Numerical Modeling of Soft Soil Stabilized by Prefabricated Vertical Drains Incorporating Vacuum reloading (with I. Sathananthan, C. Rujikiatkamjorn, and A. S. Balasubramaniam), Faculty of Engineering - Papers (2005)
This paper describes the analytical formulation of a modified consolidation theory incorporating vacuum pressure, and...
 

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A shear strength model for idealised infilled joints under constant normal stiffness (with S. Welideniya and T. Brown), Faculty of Engineering - Papers (2005)
Infill materials found in natural rock joints may cause a reduction in joint shear strength,...
 

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Effect of confining pressure on the degradation of ballast under cyclic loading (with J. Lackenby and D. Christie), Faculty of Engineering - Papers (2005)
Traditional railway foundations or substructures have become increasingly overloaded in recent years due to the...
 

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Analytical and numerical solutions for a single vertical drain including the effects of vacuum preloading (with C. Rujikiatkamjorn and I. Sathananthan), Faculty of Engineering - Papers (2005)
A system of vertical drains combined with vacuum preloading is an effective method to accelerate...
 

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Radial consolidation of clay using compressibility indices and varying horizontal permeability (with C. Rujikiatkamjorn and I. Sathananthan), Faculty of Engineering - Papers (2005)
A system of vertical drains with surcharge load to accelerate consolidation by shortening the drainage...
 

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A two-stage decision support tool for restoring tidal flows to flood mitigation drains affected by acid sulfate soil: case study of Broughton Creek floodplain, New South Wales, Australia (with W. Glamore), Faculty of Engineering - Papers (2004)
A 2-stage flood estimation and water quality decision support tool (DST) was developed, calibrated, and...
 

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Two-Phase (Air and Water) Flow through Rock Joints: Analytical and Experimental Study (with P. G. Ranjith, J. R. Price, and W. Gale), Faculty of Engineering - Papers (2003)
This research study deals with the characterization of two-phase flow in a fractured rock mass....
 

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Modelling of prefabricated vertical drains in soft clay and evaluation of their effectiveness in practice (with C. Bamunawita, I. Redana, and G. McIntosh), Faculty of Engineering - Papers (2003)
Prefabricated vertical band drains are rapidly increasing in popularity as one of the most cost-effective...
 

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Modelling of particle breakage of coarse aggregates incorporating strength and dilatancy (with W. Salim), Faculty of Engineering - Papers (2002)
The degradation of coarse aggregates under shear stresses and its influence on the shear strength...
 

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Analysis of Critical Hydraulic Gradient for Particle Movement in Filtration (with S. Radampola), Faculty of Engineering - Papers (2002)
The objective of this paper is to propose an explicit solution for the critical hydraulic...
 

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Filtration of broadly graded soils: the reduced PSD method (with M. Locke), Faculty of Engineering - Papers (2002)
Granular filters are used in earth structures, such as embankment dams, to protect fine soils...
 

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Soft Clay Stabilisation by Mandrel Driven Geosynthetic Vertical Drains (with C. I. Bamunawita), Faculty of Engineering - Papers (2002)
Geosynthetic (prefabricated) vertical band drains are now considered as one of the most cost effective...
 

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Laboratory measurement of two-phase flow paramters in rock joints based on high pressure triaxial testing (with P. G. Ranjith), Faculty of Engineering - Papers (2001)
The accurate flow measurement of each individual phase is important in unsaturated flow through rock...
 

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Time-Dependent Particle Transport through Granular Filters (with M. Locke and G. Adikari), Faculty of Engineering - Papers (2001)
This paper describes an analytical model of filtration for granular media, based on the mechanics...
 

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A New Model for the Behaviour of Granular Filters (with M. Locke), Faculty of Engineering - Papers (2001)
Filters are used in geotechnical engineering to control seepage and to prevent erosion of soil...
 

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Pyrite Oxidation Model for Assessing Ground-Water Management Strategies in Acid Sulfate Soils (with B. Blunden), Faculty of Engineering - Papers (2001)
A theoretical approach for calculating pyrite oxidation in acid sulfate soil with a macropore/matrix structure...
 

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Evaluation of Surface and Groundwater Management Strategies for Drained Sulfidic Soil using Numerical Models (with B. Blunden), Faculty of Engineering - Papers (2000)
The effective management of acid sulfate soils is a major issue for many coastal regions...
 

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Nature and Properties of Acid Sulphate Soils in Drained Coastal Lowlands in New South Wales (with B. Blunden and A. Nethery), Faculty of Engineering - Papers (1999)
Acid sulphate soils pose severe constraints to the protection of engineering infrastructure, sustainable agriculture and...
 

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Shear Behaviour of Railway Ballast based on Large Scale Triaxial Testing (with D. Ionescu and H. D. Christie), Faculty of Engineering - Papers (1998)
Quarried rock fragments (ballast) constitute one of the most commonly used construction matierals in railway...
 

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Laboratory determination of smear zone due to vertical drain installation (with I. W. Redana), Faculty of Engineering - Papers (1998)
This paper is mainly concerned with a laboratory study to investigate the effect of smear...
 

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Plane-strain modeling of smear effects associated with vertical drains (with I. W. Redana), Faculty of Engineering - Papers (1997)
The present study provides a methodology to include the smear effect of vertical drains in...
 

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Compression and Degradation of Railway Ballast Under One-Dimensional Loading (with D. Ionescu, D. Christie, and R. Chowdhury), Faculty of Engineering - Papers (1997)
The rate at which railway track geometry deteriorates is greatly influenced by the behaviour of...
 

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Analytical model for particle migration within base soil-filter system (with F. Vafai), Faculty of Engineering - Papers (1997)
This study highlights a mathematical (analytical) model simulation the filtration phenomenon applicable to a base...
 

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Effect of Stress Change on Water Inflows to Underground Excavations (with J Wang), Faculty of Engineering - Papers (1996)
See the paper
 

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Large-Scale, Radial Drainage Consolidometer with Central Drain Facility (with I. Redana), Faculty of Engineering - Papers (1995)
A large scale radial draining consolidometer at the University of Wollongong will be used to...
 

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Performance of embankment stabilized with vertical drains on soft clay (with A. S. Balasubramaniam and P. Ratnayake), Faculty of Engineering - Papers (1994)
This study describes the performance of a fldl-scale embankment raised on a soft marine clay,...
 

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Discussion and authors closure on Performance of test embankment constructed to failure on soft clay, Faculty of Engineering - Papers (1993)

Extract:

RESPONSE TO DISCUSSION BY SlEW-ANN TAN It has been explained in the paper...

 

Contributions to Books

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Predictions and observations of soft clay foundations stabilized with geosynthetic drains and vacuum surcharge (with C. Rujikiatkamjorn, A. S. Balasubramaniam, and V. Wijeyakulasuriya), Faculty of Engineering - Papers (2005)
This chapter starts with an introduction of a revised analytical model of radial drainage with...
 

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Theoretical and numerical perspectives and field observations for the design and performance evaluation of embankments constructed on soft marine clay (with I. Sathananthan, C. Bamunawita, and A. S. Balasubramaniam), Faculty of Engineering - Papers (2005)
In this chapter, a two-demensional plane strain solution is adopted for the embankment analysis, which...
 

Presentations

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Effects of Partially Penetrating Prefabricated Vertical Drains and Loading Patterns on Vacuum Consolidation (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2008)
In this study, numerical modeling of a multi-drain system is employed to determine the optimum...
 

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Investigating Erosional Behaviour of Chemically Stabilised Erodible Soils (with T. Muttuvel and H. Khabbaz), Faculty of Engineering - Papers (2008)
Chemical stabilisation is a popular technique to improve the erosion resistance of the soils. In...
 

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Vacuum Preloading Techniques - Recent Developments and Applications (with J. Chu and S. Yan), Faculty of Engineering - Papers (2008)
In this paper, an overview on the mechanisms, techniques and applications of the vacuum preloading...
 

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Vacuum consolidation effects on lateral yield of soft clays as applied to road and railway embankment (with C. Rujikiatkamjorn, G. McIntosh, and A. Balasubramaniam), Faculty of Engineering - Papers (2007)
The use of vertical drains with vacuum preloading is considered as the most effective and...
 

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Cyclic behaviour of PVD-soft soil subgrade for improvement of railway tracks (with A. Attya and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
The behaviour of saturated soft clays subjected to cyclic Loading is of considerable importance in...
 

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Soft Clay Stabilisation Using Prefabricated Vertical Drains and the Role of Viscous Creep at the Site of Sunshine Motorway, Queensland (with C. Rujikiatkamjorn and V. Wijeyakulasuriya), Faculty of Engineering - Papers (2007)
The Soft Soil Creep and the Soft Soil models are employed to analyse the behaviour...
 

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Soft clay foundation improvement with drainage and geo-inclusions, with special reference to the performance of embankments and transportation systems (with C. Rujikiatkamjorn, V. Wijeyakulasuriya, and A. S. Balasubramaniam ), Faculty of Engineering - Papers (2007)
In this paper, the geotechnical aspects of soft clay improvement using prefabricated vertical drains (PVDs)...
 

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Effectiveness of Vertical Drains in Dissipating Excess Pore Pressures Induced by Cyclic Loads in Clays (with A. Attya and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
The purpose of this paper is to investigate the effectiveness of Prefabricated Vertical Drains (PVDs)...
 

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Reconstruction Methods for Tsunami Affected Coastal Soils with Special Reference to Low-Cost Dwellings and Rail Tracks (with H. Khabbaz and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
The Boxing Day tsunami in December 2004 devastated several South and Southeast Asian countries. In...
 

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Analysis of Radial Vacuum-Assisted Consolidation Using 3D Finite Element Method (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
In this study, a 3D numerical modelling of a single vertical drains consolidation incorporating vacuum...
 

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Soft Clay Stabilization with Geosynthetic Vertical Drains beneath Road and Railway Embankments: A Critical Review of Analytical Solutions and Numerical Analysis (with C. Rujikiatkamjorn and J. Chu), Faculty of Engineering - Papers (2007)
In the wide array of existing ground improvement schemes, the use of vertical drains with...
 

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Development and application of constitutive model for railway ballast (with W. Salim and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2007)
This Discussion Paper includes an elasto-plastic stress-strain constitutive model developed at the University of Wollongong,...
 

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Radial consolidation theories and numerical analysis of soft soil stabilisation via prefabricated vertical drains (with C. Rujikiatkamjorn and R. Walker), Faculty of Engineering - Papers (2007)
In this paper, an analytical solution based on actual radial soil permeability and compressibility is...
 

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Stabilisation of rail tracks and underlying soft soil formations (with M. A. Shahin and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
Construction of rail tracks requires appropriate improvement techniques for ballast and underlying soft formation soil,...
 

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Performance and prediction of soft clay behavior under vacuum conditions (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
This paper describes the behavior of soft soil foundation under vacuum-assisted preloading at the Second...
 

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Soft soil stabilisation with special reference to road and railway embankments (with C. Rujikiatkamjorn, V. Wijeyakulasuriya, M. A. Shahin, and D. Christie), Faculty of Engineering - Papers (2006)
Much of Australian railway tracks traverse coastal areas containing soft soils and marine deposits. Pre-construction...
 

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Analytical modeling and field assessment of embankment stabilized with vertical drains and vacuum preloading (with C. Rujikiatkamjorn and I. Sathananthan), Faculty of Engineering - Papers (2006)
This study presents an analytical model of radial drainage with vacuum preloading using compressibility indices...
 

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Elastic Visco-plastic Consolidation Modelling of Soft Clays Improved by Geosynthetic Vertical Drains (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
In this paper, an elastic viscoplastic (creep) model is incorporated into the consolidation equation to...
 

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Three-Dimensional Analysis of Soft Soil Consolidation improved by Prefabricated Vertical Drains (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
A system of prefabricated vertical drains (PVDs) with a surcharge load is an effective method...
 

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Stabilisation of Ballasted Rail Tracks and Underlying Soft Formation Soils with Geosynthetic Grids and Drains (with M. Shahin, C. Rujikiatkamjorn, and D. Christie), Faculty of Engineering - Papers (2006)
Railway ballast deforms and degrades progressively under heavy cyclic loading. Ballast degradation is influenced by...
 

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Improvement of soft clays using vacuum-assisted consolidation method (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
In this study, the analytical modeling of one-dimensional consolidation by vertical drains with vacuum preloading...
 

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Developments in Geotechnical and Geo-environmental research in relation to low-lying floodplain improvement, with special reference to acidic soil improvement (with A. Golab, M. Shahin, and C. Rujikiatkamjorn), Faculty of Engineering - Papers (2006)
In many countries, the ever-growing demand for housing and tourism in coastal regions has forced...
 

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Tsunami affected Coastal Soil Disturbance and Implications on Reconstruction with Special Reference to Low-cost Dwellings and Rail Tracks (with M. Shahin, C. Rujikiatkamjorn, and H. Khabbaz), Faculty of Engineering - Papers (2005)
On 26 December 2004, the largest earthquake for more than 4 decades (magnitude 9.0) occurred...
 

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Analytical and numerical solutions for soft clay consolidation using geosynthetic vertical drains with special reference to embankments (with C. Rujikiatkamjorn, I. Sathananthan, M. Shahin, and H. Khabbaz), Faculty of Engineering - Papers (2005)
Good quality geologic materials for construction are also becoming scarce. Due to these reasons and...
 

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Laboratory Determination of Efficiency of Prefabricated Vertical Drains Incorporating Vacuum Preloading (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2004)
This paper is mainly concerned with a laboratory study to investigate the effect of vacuum...
 

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Mathematical modeling and field evaluation of embankment stabilized with vertical drains incorporating vacuum preloading (with C. Rujikiatkamjorn), Faculty of Engineering - Papers (2004)
This study presents the analytical modeling of vertical drains incorporating vacuum preloading in both axisymmetric...