Dominic E. L. Ong

Dominic E. L. Ong
Griffith University · Engineering & Built Environment

BEng (UWA), PhD (NUS), SFHEA, CPEng, FIEAust, RPEQ, NER, PEng, FIEM

About

103
Publications
42,811
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,520
Citations
Citations since 2017
66 Research Items
1404 Citations
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
Introduction
Dominic E.L. Ong currently works at the Engineering & Built Environment, Griffith University. Dominic does research in Civil / Geotechnical Engineering.
Additional affiliations
May 2018 - present
Griffith University
Position
  • Lecturer
January 2016 - March 2018
Swinburne University of Technology Sarawak Campus
Position
  • Managing Director
August 2007 - December 2015
Swinburne University of Technology Malaysia
Position
  • Lecturer
Education
January 2001 - December 2003
National University of Singapore
Field of study
  • Geotechnical Engineering
January 1996 - December 1999
University of Western Australia
Field of study
  • Civil Engineering

Publications

Publications (103)
Article
Full-text available
Bio-cementation is a new sustainable approach that has gained popularity due to its low energy and carbon footprint compared to existing technologies for geotechnical and geoenvironmental engineering applications. Bio-cementation is a soil improvement technique that involves binding the pore space of soil particles with calcium carbonate minerals b...
Article
Full-text available
The process of ureolysis-driven biocementation is used to improve granular soils. The precipitation of calcium carbonate (CaCO3) crystals results from the reactions of urease generated by ureolytic bacteria and chemical reagents, which strengthen or bind soil particles together. Using a lab-based scaled physical model, this paper investigated the i...
Article
The utilization of industrial waste as an aluminosilicate precursor (AP) for alkali-activated material (AAM) production can provide an outlet for the growing waste stream and relief to landfill. However, to achieve the transformation of extremely varied waste into normalized APs with stable performance on an industrial scale, a universal testing me...
Article
Full-text available
Sand and gravel are the world’s most exploited resources, even surpassing fossil fuels; they are mostly used for producing concrete. On the one hand, due to restrictions on the use of river sand in some regions of the world to conserve riverbeds, the demand for alternative fine aggregates in the construction sector has risen dramatically. The dispo...
Article
There has been growing research interests in the study of sustainable geomaterials to reduce or replace the use of cement to promote greener construction. A machine learning technique based on Bayesian inference was proposed in this study to predict the optimum strength gain in sustainable geomaterials as an alternative to preliminary investigation...
Article
Full-text available
A bi-directional static load test (BDSLT) is one of the most effective methods for accurately 14 estimating pile bearing capacity, in which the test pile is divided into two portions by activating the 15 single-loading device welded along the pile shaft. BDSLT thus eliminates the safety concerns and 16 space limitations imposed by the reaction syst...
Article
Full-text available
Soil stabilization is an in situ soil treatment in which soils are mixed with cementitious or other chemical stabilizing agents. Determining the unconfined compressive strength (UCS) of stabilized soil is a principal task in the design and construction of the ground improvement. Hence, this study aims to develop a reliable predictive model for the...
Article
Urbanization has increased the demand of tunnels for various infrastructure. Micro-tunnelling with pipe-jacking method has been widely adopted for the construction of underground pipe networks due to its numerous advantages compared to conventional trenching. This review paper has addressed the major factors influencing jacking forces during pipe-j...
Article
Excavation of a 16 m deep shaft was suspended due to groundwater drawdown of about 5 m that led to nearby ground subsidence and settlement of infrastructure. As a remedial measure, a deep-ground recharge system comprising multi-point recharging wells was conceived and then designed to mitigate the detrimental effects caused by the groundwater drawd...
Article
Full-text available
The study of soil–structure interface behavior contributes to the fundamental understanding of engineering performance and foundation design optimization. Previous research studies the effect of soil characteristics and surface roughness property on the soil–material interface mechanism via interface shear test. The reviews utilizing past establish...
Article
Geopolymer, also termed as alkali-activated material (AAM), is a promising concrete technology having the advantages of low carbon emission and resource reclamation. Intensive studies have verified the feasibility of using waste as an aluminosilicate precursor (AP) to synthesize AAM. However, the inconsistent characteristics of raw materials are an...
Chapter
The rectangular or noncircular pipe jacking technology is defined as irregular shape of pipe jacking in the book. It has been developed and practiced worldwide particularly in Japan and China.
Chapter
The mechanistic behavior of a tunnel boring machine (TBM) starts drawing great attention from scientists and engineers in recent years because it appears to affect the efficiency of tunnel excavations and project costs. Factors affecting the mechanistic behavior of tunnel boring machine primarily include geology and jamming phenomena. The following...
Chapter
Urbanization has increased the demand for underground infrastructure to be built in order to minimize disruptions to road users, hence the popularization of trenchless technology. Pipe jacking is just one of the many trenchless technology methods, others being the displacement (e.g., pipe ramming), drilling (e.g., horizontal directional drilling),...
Chapter
Living in the twenty-first century means designing, constructing, operating, and decommissioning infrastructure in ways that are good for planet and people. Over the last decade, research and discussion of this imperative has evolved from calls to ‘green the built environment’, through to calls for ‘sustainable design and construction’, and more re...
Chapter
Temporary shafts are constructed to facilitate the jacking and receiving of microtunnel boring machines (mTBM) used in pipe jacking works, hence the terminology ‘jacking’ or ‘launching’ shafts and ‘receiving’ or ‘retrieval’ shafts. Shafts vary in diameters and depths due to the varying lengths and diameters of the jacking pipes used to create the s...
Chapter
For the design of any buried infrastructure such as pipelines, it is crucial for investigations to be conducted. Such investigations include subsurface exploration, in situ field testing, and laboratory tests. These findings will back up the geological setting and other underground data gathered. During the planning stage, it is important to have t...
Chapter
Systems of excavation, thrust, muck removal, and erection of lining segments are key processes of conventional boring using shield tunneling machines. For an irregular-shaped (noncircular) shield, the process is principally the same except that the systems of excavation and erection of lining segments have to be changed to cater for the irregular s...
Chapter
With the advancement of pipe jacking technology, there has been a growing demand for research on aspects of the pipe jacking method. For instance, the need to assess frictional loads during pipe jacking was emphasized by Ripley (The performance of jacked pipes, PhD thesis, Magdalen College, Oxford University, 1989).
Article
Cement is commonly used as a stabilisation material in soft soil stabilisation. However, the use of cement can cause environmental issues as the production of cement results in high emission of CO 2 . Hence, it is essential to develop other suitable stabilisation materials to reduce the amount of cement used in the stabilisation of soft soil. Fly a...
Article
Full-text available
The study aims to develop a reliable model using gene-expression programming (GEP) technique for estimating the unconfined compressive strength (UCS) of soil stabilization by cement and fly ash. The model considered the effects of several parameters, including the fly ash characteristics such as calcium oxide (CaO) content, CaO/SiO2 ratio, and loss...
Article
Full-text available
The study of the strength of reconstituted and stabilised soft soils is very important in geotechnical engineering. The soil particles, such as clay, sand, and silt play important roles in determining the behaviour of soils. The behaviour of clay and sand particles are unique; however, the behaviour of silt particles lie in a transitional form betw...
Article
Full-text available
Soil improvement using biopolymers has attracted considerable attention in recent years, with the aim to reduce the harmful environmental effects of traditional materials, such as cement. This paper aims to provide a review on the environmental assessment of using biopolymers as binders in soil improvement, biopolymer-treated soil characteristics,...
Article
There has been an increasing demand for underground construction due to urbanization and limited land in metropolitan cities in the recent years. However, the behavior of underground structures in soils and rocks is often not completely understood. The emergence of Artificial Intelligence (AI) techniques is envisaged to have a huge potential in add...
Article
There frequently exists inadequacy regarding the number of boreholes installed along tunnel alignment. While geophysical imaging techniques are available for pre-tunnelling geological characterization, they aim to detect specific object (e.g. water body and karst cave). There remains great motivation for the industry to develop a real-time identifi...
Article
Full-text available
The extensive application of natural unbound granular materials (UGMs) motivates studies into the mechanical properties of alternatives such as processed crushed rocks employed commonly as base or subbase layers. The rutting and settlement generated in base and subbase layers is widely restricted in many specifications and standards. In this resear...
Chapter
The study of micromechanical behaviour of granular materials has a continuous interest in several engineering fields. Better understanding of the relationship between particle morphology and mechanical performance of such materials is essential in geotechnical applications. Past studies have used discrete element modelling (DEM) to demonstrate the...
Chapter
Application of pipe-jacking method in the form of microtunneling has become more popular over the conventional open cut method for the installation of underground infrastructure such as buried sewer pipelines in urban setting in recent years. This is due to the advantages offered by trenchless technology such as reduced disruptions to traffic and t...
Article
The unconfined compressive strength (UCS) of cement-stabilized soil depends on the particle size distribution, the soil chemistry composition, the cement content, the water content, and the curing time. Determining the UCS of soil-cement material is an important task in the design and construction of infrastructure supported on marginal soils that...
Article
Full-text available
Application of Building Information Modelling (BIM) in architecture, engineering, and construction industry is known for its productivity and efficiency. Green BIM is one of the recent applications that aids users in achieving sustainability and/or improved building performance objectives through design and analysis of digital semantic models. The...
Article
Direct shear tests have been commonly used to study the frictional stresses during pipe-jacking. Particle angularity and mineralogy will influence the shear strength with apparent cohesion contributing to the arching effect during soil-structure interaction via pipe-jacking. Past researchers found it challenging to physically study particle behavio...
Conference Paper
Full-text available
In Malaysia, Green Building Index (GBI) is one of the sustainability rating tools for the construction industry, focusing on six main categories including Energy Efficiency (EE), Materials and Resources (MR), Water Efficiency (WE), Indoor Environment Quality (EQ), Sustainable Site Planning & Management (SM) and Innovation (IN). Currently, the proce...
Article
The response of tunnel liner forces to the construction of very close-proximity tunnels is rather complex and depends upon several influencing factors, e.g. ground deformability, liner joint configuration, intersection angle of new tunnel construction, a consensus with respect to optimisation of close-proximity tunnelling has not yet reached. This...
Article
Full-text available
This paper presents the use of a 700 mm-diameter contiguous bored pile (CBP) wall for a main basement deep excavation project with cut-and-cover tunnel. Due to the presence of cement grout columns between piles behind the CBP wall, the main basement was considered to be ‘impermeable’. However, site observations have shown that installation of groun...
Conference Paper
The impacts of the lubrication upon the pipejacking works are significant and necessary to be considered in tunnelling design. This study described a method that can be used to evaluate the lubrication performance by the reduction in the frictional coefficient μ as a function of injection type, soil and lubrication natures, and misalignment. The re...
Article
Full-text available
Production of urease enzyme from ureolytic bacteria (e.g. Sporosarcina pasteurii) is essential for precipitation of CaCO3. This bioprocess is notably utilized for soil improvement, biocementation and bioremediation of heavy metals. Despite the viability for field-scale implementation as a suitable alternative to conventional treatment methods, most...
Conference Paper
Full-text available
CONTEXT 21 st Century engineering demands competency in data retrieval, storage and management, where possible in real or near-real time. From design through to operation, maintenance and disassembly, it is critical for engineers to harness the power of data analytics, towards achieving crucial infrastructure and development targets within many of...
Article
This paper presents a method to interpret the tensile test results for a concrete pile when the concrete is stressed beyond its tensile limit, which results in anomalies in the strain gage data that is collected during active load testing. Two drilled shafts and two barrettes are studied using the proposed method. Any pile loads that are computed u...
Article
Full-text available
The use of microbially induced carbonate precipitation (MICP) to produce biocementitious material for soil stabilization has emerged in recent decades as a sustainable alternative approach to conventional methods. However, the use of standard analytical-grade reagents for various MICP studies makes this technology very expensive and unsuitable for...
Article
Full-text available
In the earlier companion paper (Ong and Choo, 2018), direct shear tests were performed on reconstituted tunneling rock spoils for the development of equivalent tangential cohesion, c't,p and friction angle, ϕ't,p. These equivalent rock strength parameters were used in assessing jacking forces, which were measured from three pipe-jacking drives nego...
Article
Full-text available
The construction industry in Malaysia faces a number of complications in terms of managing project duration and budgeted cost. The recent technology trend has moved the industry towards adoption of Building Information modelling (BIM) as a mean to efficiently plan, design, build, manage and control projects. Since BIM is perceived as a holistic sol...
Article
Full-text available
Several researchers have studied the behavior of particles during shearing to have better insight into the Mohr-Coulomb (MC) strength parameters. In most cases, the movements of particles along the shear band were studied by means of numerical modeling to obtain the velocities and directions of the soil particles. The use of a transparent shear box...
Article
The microbial‐induced calcite precipitation (MICP) process for ground improvement uses microorganisms to hydrolyze urea, producing carbonate ions to induce in situ calcium carbonate (CaCO3) precipitation in soil to improve its strength. This paper proposes using the hydroxide‐based absorption of CO2 instead to provide the carbonate ion source. This...
Article
Full-text available
Biocalcification through the use of ureolytic bacteria and biochemical activities has evolved in recent decades into a fervent resourceful effective technology suitable for soil stabilization, crack repair and bioremediation. Extensive studies have been carried out on numerous ureolytic bacterial species isolated from soils and sewage samples. Howe...
Chapter
Full-text available
Two case studies involving deep excavation in peaty soils are presented in this invited paper. The water and organic contents of peaty soils can be high as 1,200 and 60%, respectively. The design of deep excavation involving peaty soil layer can be very challenging as it is known that peaty soil can exhibit greater permeability in the horizontal di...
Article
Full-text available
Sporosarcina pasteurii is a well-known ureolytic microbial species that proficiently induces the deposition of calcium carbonate through microbially induced carbonate precipitation (MICP) process for various biotechnological and engineering purposes. In view to resolving the concern on high-cost bacterial cultivation due to the conventional use of...
Article
Full-text available
In the past, there were many research studies carried out on the response of single piles and pile groups under compression loads, but it was comparatively lesser for piles and pile groups under uplift loads. Uplift loads on piles usually occur in pile foundations supporting wind farm structures, tall chimneys, transmission towers and jetty structu...
Article
Full-text available
Stone column use has gained popularity around the globe as an effective ground improvement technique to improve the loadbearing capacity of soft soils. End-bearing stone columns are commonly used, but occasionally floating stone columns are adopted since they have been proven to achieve the necessary load-carrying capacity and serviceability requir...
Article
Full-text available
In this study, fly ash was added to residual soil to produce soil-fly ash geopolymer bricks. This study investigated the effects of fly ash/soil, alkali activator/ash, Na2SiO3/KOH (or NaOH), additional water content, curing condition, and curing temperature on the compressive strength of soil-fly ash geopolymer. The results showed that the optimum...
Article
Full-text available
The identification of significant input variables to the output provides very useful information for mix design for soil-fly ash geopolymer in order to obtain the optimum compressive strength. The importance of input variables to the output of soil-fly ash geopolymer is quantified by Garson's algorithm and connection weights approach in an artifici...
Article
Full-text available
A method of backanalysis was used for the assessment of pipe-jacking forces from three pipe-jacking drives in laminated shale and interbedded lithological units of metagraywacke, siltstone, greywacke and phyllite found in the highly weathered and fractured lithologies of the Tuang Formation (Malaysia). Direct shear tests were conducted on reconstit...
Article
Full-text available
Finite element simulation for analysis of a capped pile group was conducted to investigate the interaction among piles, soil and pile cap, especially the effects resulted from concrete damaging. The simulation was to develop a calibrated model using the test data and to apply that model for conditions not present during the test. In addition to con...
Conference Paper
Full-text available
Pressuremeter test (PMT) is an in-situ test which serves well as an alternative to characterize highly fractured rock masses. However, complications arise as most of the pressuremeter probes are designed for tests in soils whose strength and stiffness are much lower than rocks. As a result, the pressuremeter probe used cannot apply sufficient press...
Article
Full-text available
Fine particles may migrate in the preexisting pores of an internally unstable soil matrix caused by water flow. This migration changes the fine particle distribution and content at different zones and can affect the mechanical properties of these soils. Due to the different roles that fine particles can play in the force chains of an internally uns...
Conference Paper
Full-text available
Internal erosion is a prime cause of dam failure. Despite studies over the years, there are still many ambiguities in the post erosion response of an internally unstable soil. In this study, a new combined erosion-triaxial apparatus was developed to investigate the post erosion behavior of a gap-graded soil (vulnerable to internal erosion). This ne...
Article
Full-text available
Microbially induced carbonate precipitation (MICP) is a process that has emerged as an attractive alternative ground improvement technique in Geotechnical and Civil Engineering using ureolytic bacteria for soil strengthening and stabilisation. Locally isolated Sporosarcina pasteurii from limestone cave samples of Sarawak were found to have high ure...
Article
Full-text available
Biocementation is a green treatment technique which makes use of microbially induced carbonate precipitation (MICP) process to enhance the geotechnical features of substandard soils. The objective of this study was to conduct a biocement test in laboratory scale using native urease-producing bacteria to improve the surface strength of poorly graded...
Article
Full-text available
It is important for geotechnical engineers to understand the intrinsic and mechanical behaviour of silt as it is presently recognised that there exist gaps in understanding its fundamental behaviour. The behaviour of kaolin samples with varying clay and silt contents was investigated in the present study. This study characterised the samples by the...
Article
Full-text available
For the Kuching Wastewater Management System Phase 1 project in Kuching, Malaysia, 7·7 km of trunk sewer lines were constructed in the highly fractured, highly weathered Tuang Formation using a pipe-jacking method. The pipelines were founded at depths of up to 35 m below Kuching City, where the majority of the pipe-jacking activities would traverse...
Article
Full-text available
Aims: Microbial induced calcite precipitation (MICP) is a natural occurring biological process that employs the usage of ureolytic bacteria for a wide range of applications such as improving the mechanical properties of soils. The aim of this study was to isolate and identify local urease-producing bacteria from the limestone caves of Sarawak and c...
Article
Full-text available
Nyalau Formation, found in Bintulu Division in Sarawak, Malaysia was formed by a thick array of shallow water marine and paralic sedimentary rocks. The formation is of predominantly sandstone origin and also the lesser known ‘limestone’ which is described as hardpan calcrete in this paper. Changes of sea levels during the mid-Pleistocene epoch resu...