Assessment and Prediction of Particle Breakage under Cyclic Loading. Every year, transport industries spend millions of dollars to maintain existing tracks suffering excessive settlement due to heavy traffic. In railways, differential settlement and track fouling are mostly due to ballast breakage. Frequent maintenance requires large amounts of quarried ballast causing environmental degradation. Simulation of particle breakage subject to cyclic loading is pioneering fundamental research that wi ....Assessment and Prediction of Particle Breakage under Cyclic Loading. Every year, transport industries spend millions of dollars to maintain existing tracks suffering excessive settlement due to heavy traffic. In railways, differential settlement and track fouling are mostly due to ballast breakage. Frequent maintenance requires large amounts of quarried ballast causing environmental degradation. Simulation of particle breakage subject to cyclic loading is pioneering fundamental research that will have significant impact on the design and maintenance of future rail and road networks. A full understanding of the breakage mechanisms of aggregates will lead to innovative techniques in design and construction, including faster trains carrying heavier loads with reduced maintenance costs.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
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE140100010
Funder
Australian Research Council
Funding Amount
$900,000.00
Summary
National Facility for Cyclic Testing of High-speed Rail (FCTHSR). National facility for cyclic testing of high-speed rail: Frontier technologies in rail transport demand access to state-of-the-art testing facilities for track modelling. The proposed national Facility for Cyclic Testing of High-Speed Rail (FCTHSR) is internationally a first-of-its-kind and it will be designed and built in-house for examining an array of Australian ground conditions and integrated track components. This unique fac ....National Facility for Cyclic Testing of High-speed Rail (FCTHSR). National facility for cyclic testing of high-speed rail: Frontier technologies in rail transport demand access to state-of-the-art testing facilities for track modelling. The proposed national Facility for Cyclic Testing of High-Speed Rail (FCTHSR) is internationally a first-of-its-kind and it will be designed and built in-house for examining an array of Australian ground conditions and integrated track components. This unique facility will offer a national and international hub for industry-driven research and consulting. The project outcomes will propel more Australian researchers to be among the world-leaders of rail technologies providing better solutions to challenging track environments. Prototype testing will ensure safer and cost-effective track designs.Read moreRead less
Understanding mud pumping in heavy haul railroads. This project aims to examine the factors that cause mud pumping and evaluate the effectiveness of sub-surface drainage to prevent rail track instability. Fast heavy haul operations (such as loads used in mining and agriculture) impart repeated loads on the natural formation that can result in mud pumping. If the build-up of water pressure becomes excessive this can cause track failure. Through an experimental program and field study, the mechani ....Understanding mud pumping in heavy haul railroads. This project aims to examine the factors that cause mud pumping and evaluate the effectiveness of sub-surface drainage to prevent rail track instability. Fast heavy haul operations (such as loads used in mining and agriculture) impart repeated loads on the natural formation that can result in mud pumping. If the build-up of water pressure becomes excessive this can cause track failure. Through an experimental program and field study, the mechanisms of mud pumping, incorporating train loads and frequencies, will be studied, and the role of vertically installed drains will be quantified for improved practical design. The project aims to contribute to improved track longevity and reduced maintenance costs, with a corresponding boost in rail productivity.Read moreRead less
Synthetic energy absorbing composite for improved track performance. This project aims to study the performance of a novel synthetic energy absorbing composite (SEAC) placed beneath the railway ballast to minimise degradation. The use of coal wash and steel slag blended with shredded recycled rubber as SEAC constituents is environmentally beneficial. The role of SEAC with respect to impact and cyclic loads will be assessed through extensive geotechnical laboratory and numerical analysis. The res ....Synthetic energy absorbing composite for improved track performance. This project aims to study the performance of a novel synthetic energy absorbing composite (SEAC) placed beneath the railway ballast to minimise degradation. The use of coal wash and steel slag blended with shredded recycled rubber as SEAC constituents is environmentally beneficial. The role of SEAC with respect to impact and cyclic loads will be assessed through extensive geotechnical laboratory and numerical analysis. The research outcomes based on the proposed energy considerations will lead to improved track design and analysis in view of stability, safety and operational efficiency.Read moreRead less
Mitigating the Severity of Level Crossing Accidents and Derailments. Ongoing increases in the number of level crossings and heavy road vehicles cause more frequent and severe level crossing accidents and derailments. Despite the use of active warning systems, each year, on average, 100 level crossing accidents occur in Australia. With a view to mitigating these crashes, this research aims to formulate theories for reduction in crash energy and effective wheel constraints to prevent derailment by ....Mitigating the Severity of Level Crossing Accidents and Derailments. Ongoing increases in the number of level crossings and heavy road vehicles cause more frequent and severe level crossing accidents and derailments. Despite the use of active warning systems, each year, on average, 100 level crossing accidents occur in Australia. With a view to mitigating these crashes, this research aims to formulate theories for reduction in crash energy and effective wheel constraints to prevent derailment by modifying the levels of road and rail crossings and providing guard rails in the recesses of these modified level crossings. The theories are intended be developed using nonlinear dynamic computational methods and laboratory experiments. The outcomes are expected to enable reduction in the severity of level crossing accidents and hence save lives and costs of derailment.Read moreRead less
The potential role of transit-oriented development in Australian cities: a critical assessment using a suburban rail corridor. Sustainability in urban development and a reduction in our dependence on the private car for mobility are key concerns in Australia and elsewhere. The results of this research will inform and lead world's best practice in the evaluation and adoption of sustainable transport solutions, especially those related to investment in urban public transport systems, and hence pro ....The potential role of transit-oriented development in Australian cities: a critical assessment using a suburban rail corridor. Sustainability in urban development and a reduction in our dependence on the private car for mobility are key concerns in Australia and elsewhere. The results of this research will inform and lead world's best practice in the evaluation and adoption of sustainable transport solutions, especially those related to investment in urban public transport systems, and hence provide options for planners and developers to minimise the impacts of developments on the environment. The benefits from the project will be in improved planning and design principles and planning tools for transit-oriented urban developments in both inner and outer suburbs in Australian cities.Read moreRead less
Load-displacement and consolidation behaviour of soft soils stabilised by stone columns for transport infrastructure. The project outcomes will guarantee better understanding of the benefits of stone columns for stabilising soft soil foundations through numerical and experimental processes. The enhanced load-carrying capacity and mitigation of excessive soil movements will contribute to sustainable development of transport infrastructure.
Cyclic behaviour of unstable soils stabilised by lignosulfonate with special reference to rapid transport infrastructure. The project will pioneer the use of the paper industry by-product, lignosulphonate, to stabilise unstable soils in rural and regional Australia. The prevention of unacceptable erosion, settlement and mass movement of these soils will enable efficient operation of high speed rail and busy highways that are vital for agriculture and mineral industries.
Performance of granular matrix under heavy haul cyclic loading. Performance of granular matrix under heavy haul cyclic loading. This project aims to enhance the longevity of roads and tracks based on improved geotechnical design. The demand for safe and durable roads and railways to accommodate faster and heavier traffic has increased steadily in the past decade. This project will research the performance of compacted granular waste (coalwash & flyash) under cyclic loads, particularly relevant t ....Performance of granular matrix under heavy haul cyclic loading. Performance of granular matrix under heavy haul cyclic loading. This project aims to enhance the longevity of roads and tracks based on improved geotechnical design. The demand for safe and durable roads and railways to accommodate faster and heavier traffic has increased steadily in the past decade. This project will research the performance of compacted granular waste (coalwash & flyash) under cyclic loads, particularly relevant to heavy haul industry, from a geomechanics perspective. It will use geotechnical laboratory testing and field monitoring to develop a computational model, incorporating the relevant strength and deformation properties at varied load frequencies. The anticipated outcome is sustainable, more resilient transport infrastructure.Read moreRead less