Development of hot-mix asphalt layer thickness design for longer-life asphalt pavements. This project will bring about an advance in pavement analysis and design, based on a more realistic approach to design inputs, analysis and design. The contribution of the project outcomes to knowledge in the field will be extremely important and a move away from empiricism will benefit pavement building industries world-wide.
The effect of tunelling on existing rock bolts. As more underground facilities such as rail, road, sewerage and service tunnels are constructed in our major cities, more and more frequently new tunnels have to cross over or run alongside existing tunnels. As the roofs of tunnels are generally supported by rock bolts and lined with shotcrete, the support system can be damaged by the rock movements caused by the excavation of the new tunnel. Little research has been carried out on this problem, an ....The effect of tunelling on existing rock bolts. As more underground facilities such as rail, road, sewerage and service tunnels are constructed in our major cities, more and more frequently new tunnels have to cross over or run alongside existing tunnels. As the roofs of tunnels are generally supported by rock bolts and lined with shotcrete, the support system can be damaged by the rock movements caused by the excavation of the new tunnel. Little research has been carried out on this problem, and so often expensive deviations have to be made to tunnels to avoid going near existing ones. The proposed research will provide numerical tools to allow prediction of loads induced into rock bolts by nearby tunnels, leading to more economical and safer tunnel design.
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Enhanced Analysis of Time Dependent Viscous Behaviour of Soft Clay. Often post construction settlements of structures overlying clayey soils have been observed to be more than those predicted, or the predicted rate of settlement is not correct. The main benefit of this research is providing an accurate but simplified approach, which can be used by practicing engineers to predict the post construction settlement of structures in the design phase of construction projects. The community can conside ....Enhanced Analysis of Time Dependent Viscous Behaviour of Soft Clay. Often post construction settlements of structures overlying clayey soils have been observed to be more than those predicted, or the predicted rate of settlement is not correct. The main benefit of this research is providing an accurate but simplified approach, which can be used by practicing engineers to predict the post construction settlement of structures in the design phase of construction projects. The community can considerably benefit from the findings of this project including safer structures, significant reduction in the future maintenance costs and enhancing the performance of bridges, buildings, roads, railways and dams with less cracks and differential settlement.Read moreRead less
Stabilization of railway subgrade by lime-flyash slurry injection. The rail network in Australia provides a major transport route for commuters as well as transportation of goods. The subgrade of railway track should provide adequate support for the overlying ballast and capping layers. Hence, a poor subgrade always results in track problems associated with uneven track, fouled ballast, and misalignment of the track. This project will investigate in detail the fundamental mechanisms and key para ....Stabilization of railway subgrade by lime-flyash slurry injection. The rail network in Australia provides a major transport route for commuters as well as transportation of goods. The subgrade of railway track should provide adequate support for the overlying ballast and capping layers. Hence, a poor subgrade always results in track problems associated with uneven track, fouled ballast, and misalignment of the track. This project will investigate in detail the fundamental mechanisms and key parameters involved in the improvement of subgrade soil by injecting lime-flyash slurry. This project will develop an improved design procedure for lime-flyash slurry injection in the field based on experimental and numerical modelling.Read moreRead less
The effects of cyclic loading on partially saturated soils. This project aims to predict the settlement and strength of the upper, partially saturated layer of the ground when it is subjected to cyclic loading. Most of our critical infrastructure is built on or in this layer, but currently we cannot reliably predict the ground response of partially saturated soils to the cyclic loads that arise from earthquakes, traffic and construction processes. The project is expected to develop a new numeric ....The effects of cyclic loading on partially saturated soils. This project aims to predict the settlement and strength of the upper, partially saturated layer of the ground when it is subjected to cyclic loading. Most of our critical infrastructure is built on or in this layer, but currently we cannot reliably predict the ground response of partially saturated soils to the cyclic loads that arise from earthquakes, traffic and construction processes. The project is expected to develop a new numerical model that can predict the effects of cyclic loads, and provide updated engineering guidance to ensure the integrity of infrastructure dependent on partially-saturated soils. Improved predictions of the processes involved resulting from this project will have significant economic benefits, as well as ensuring the safety and security of infrastructure and reduced maintenance costs.Read moreRead less
Performance, Evaluation, and Enhancement of Hydrated Cement Treated Crushed Rock Base (HCTCRB) as a Road Base Material for Western Australian Roads. The development of knowledge of HCTCRB, an advanced material in the pavement engineering discipline, will underpin growth in the highway and road construction industry. The key outcomes of this study will enhance and change highway and road organisations, contractors, engineers and others interested in the use and design of pavement materials. This ....Performance, Evaluation, and Enhancement of Hydrated Cement Treated Crushed Rock Base (HCTCRB) as a Road Base Material for Western Australian Roads. The development of knowledge of HCTCRB, an advanced material in the pavement engineering discipline, will underpin growth in the highway and road construction industry. The key outcomes of this study will enhance and change highway and road organisations, contractors, engineers and others interested in the use and design of pavement materials. This is particularly so in light of the recent change to a new era of analytical approaches, rather than the empirical approach of the past. When the outcomes of this project are applied, they will result in an improvement in overall road and highway quality. Read moreRead less
Optimisation of Road Network Maintenance Strategies for Life-Cycle Costs. The future of Tasmania and the nation as a competitive force in the international market is intimately linked to its transportation infrastructure network. The successful maintenance and performance of the road component is essential for an efficient and integrated system and minimisation of freight costs. The research proposes to develop a less empirical and phenomenological method of predicting the future performance of ....Optimisation of Road Network Maintenance Strategies for Life-Cycle Costs. The future of Tasmania and the nation as a competitive force in the international market is intimately linked to its transportation infrastructure network. The successful maintenance and performance of the road component is essential for an efficient and integrated system and minimisation of freight costs. The research proposes to develop a less empirical and phenomenological method of predicting the future performance of pavements, based on optimisation of maintenance strategies, by incorporating the use of probabilistic methods and Geographical Information Systems (GIS) into new Whole of Life Costing (WOLC) models.Read moreRead less
Improvement of the performance of water-sensitive geomaterials using hydrophobic additives. Geo-structures such as road and railway bases suffer from water induced damage because they readily interact with the atmosphere and shallow water tables. Under traffic loading, damage to geo-structures occurs as cracking, rutting and roughness, when the strength and stiffness of the geomaterials are compromised by on-going moisture variations. Substantial cost savings to the community can be made if ef ....Improvement of the performance of water-sensitive geomaterials using hydrophobic additives. Geo-structures such as road and railway bases suffer from water induced damage because they readily interact with the atmosphere and shallow water tables. Under traffic loading, damage to geo-structures occurs as cracking, rutting and roughness, when the strength and stiffness of the geomaterials are compromised by on-going moisture variations. Substantial cost savings to the community can be made if effective methods can be found to minimise such damage. This project proposes to study a novel technique, in which blends of hydrophobic polymer additives are used to increase the stability of geomaterials subjected to varying moisture levels and traffic loading.Read moreRead less
Future Proofing Transportation Infrastructure Assets. This project seeks to develop a model to predict construction project overruns. Transportation infrastructure assets are prone to cost and schedule overruns during their construction, which have negative impacts on asset owners and users. This project aims to develop a systemic model that can be used to determine the causal nature of cost and schedule overruns and their probability of occurrence. By enabling the predication of overruns, the p ....Future Proofing Transportation Infrastructure Assets. This project seeks to develop a model to predict construction project overruns. Transportation infrastructure assets are prone to cost and schedule overruns during their construction, which have negative impacts on asset owners and users. This project aims to develop a systemic model that can be used to determine the causal nature of cost and schedule overruns and their probability of occurrence. By enabling the predication of overruns, the project aims to ensure that the public and private sector are able to put in place mitigation strategies to reduce the impact of the economic and productivity issues that arise due to overruns.Read moreRead less
Thermal-induced unilateral plate buckling of concrete pavements: design and evaluation. The project addresses the upheaval buckling of concrete pavements, which is caused by increasingly frequent heat spells. It will consider both the vulnerability assessment of existing pavements, and the design of new pavements made from low-carbon geopolymer concretes (which are lighter than conventional pavements) against upheaval buckling.