Ageing of pile shaft friction in sand. Piles driven in sand are very commonly used to support structures in Australia. Their design, however, is based on pile capacities measured shortly after installation - even though capacities are observed to increase significantly with time. This proposal seeks to develop a methodology through which the effects of time can be incorporated in design and hence lead to cheaper foundation solutions.
Numerical prediction of train and vehicle induced ground vibrations and their effects on structures. This project will develop an innovative new method based on coupled finite element and scaled boundary finite-element analysis for predicting the ground vibrations induced by road traffic and underground or surface trains. The method will have immediate application in transportation engineering to predict traffic-induced ground vibrations, in geotechnical engineering to design isolation trenches ....Numerical prediction of train and vehicle induced ground vibrations and their effects on structures. This project will develop an innovative new method based on coupled finite element and scaled boundary finite-element analysis for predicting the ground vibrations induced by road traffic and underground or surface trains. The method will have immediate application in transportation engineering to predict traffic-induced ground vibrations, in geotechnical engineering to design isolation trenches and wave barriers to dissipate wave propagation, and in structural engineering to estimate in-structure vibration level and design isolators for sensitive equipment housed within. The technique will involve fundamental advances in the scaled boundary finite-element method, as calculations will be performed in a moving reference frame.Read moreRead less
Reducing geotechnical design conservatism to secure floating wind energy. The next frontier for offshore wind energy is moving further out to sea to avail of stronger and more consistent wind speeds. In these water depths, wind turbines are installed on floaters tethered to anchors in the seabed. Geotechnical design of anchors is inherently conservative, having been shaped by technical and economic considerations of oil and gas facilities. The offshore wind energy industry cannot afford to adopt ....Reducing geotechnical design conservatism to secure floating wind energy. The next frontier for offshore wind energy is moving further out to sea to avail of stronger and more consistent wind speeds. In these water depths, wind turbines are installed on floaters tethered to anchors in the seabed. Geotechnical design of anchors is inherently conservative, having been shaped by technical and economic considerations of oil and gas facilities. The offshore wind energy industry cannot afford to adopt such conservatism if floating wind is to become commercially viable. This project will, through numerical developments, geotechnical centrifuge modelling and field testing, develop the science that will lead to a reliability-based geotechnical design approach to make floating offshore wind energy economic and viable.Read moreRead less
Unlocking new generation physical modelling with realistic soil response. This project will improve the safety and efficiency of geo-structures associated with offshore wind developments by better characterising and replicating the behaviour of carbonate sediments. Novel characterisation techniques will be used to better understand the links between the chemical and structural composition of the sediments and their engineering properties relevant to geotechnical design, and how to better replica ....Unlocking new generation physical modelling with realistic soil response. This project will improve the safety and efficiency of geo-structures associated with offshore wind developments by better characterising and replicating the behaviour of carbonate sediments. Novel characterisation techniques will be used to better understand the links between the chemical and structural composition of the sediments and their engineering properties relevant to geotechnical design, and how to better replicate carbonate sediment behaviour in a laboratory – an outcome that has eluded researchers for decades. The main outcomes of the project will be the development of soil sample reconstitution techniques enabling high-fidelity physical modelling to be undertaken to assist in the design offshore wind turbine foundations.Read moreRead less
Mechanisms controlling displacement pile behaviour in sands. The project will exploit the potential of the drum centrifuge and recent innovations in earth pressure cell design to provide a uniquely comprehensive investigation into the factors controlling the performance of displacement piles in sand. A wide range of factors affecting the stresses that develop at the pile-soil interface will be examined in a systematic fashion to facilitate the derivation of more reliable and efficient design app ....Mechanisms controlling displacement pile behaviour in sands. The project will exploit the potential of the drum centrifuge and recent innovations in earth pressure cell design to provide a uniquely comprehensive investigation into the factors controlling the performance of displacement piles in sand. A wide range of factors affecting the stresses that develop at the pile-soil interface will be examined in a systematic fashion to facilitate the derivation of more reliable and efficient design approaches for piles.Read moreRead less
Application of field penetrometer data to offshore geotechnical design in deep water. Offshore oil and gas extraction is a $17 billion/year industry and a major component of GDP, but facing increasing challenges in Australia as exploration extends into water depths exceeding 1 km. In order to develop safe and economic facilities in these environments, solutions to significant technical challenges are required, ranging from new technology to assess the strength of seabed soils, to formulating res ....Application of field penetrometer data to offshore geotechnical design in deep water. Offshore oil and gas extraction is a $17 billion/year industry and a major component of GDP, but facing increasing challenges in Australia as exploration extends into water depths exceeding 1 km. In order to develop safe and economic facilities in these environments, solutions to significant technical challenges are required, ranging from new technology to assess the strength of seabed soils, to formulating response models for oil and gas pipelines and shallow foundations or anchoring systems. This project contributes to future exploitation of offshore hydrocarbon reserves while minimising impact on the marine environment; it brings direct benefits to our economy and helps maintain our world leadership in offshore geotechnical research.Read moreRead less
Harnessing the power of oceans: anchors for floating energy devices. This project aims to establish a geotechnical design framework for shared anchoring systems subjected to multidirectional cyclic loading for large integrated arrays of floating wind turbines and floating wave energy converters. This is expected to facilitate new, economic foundation solutions, generating radical cost savings to help unlock Australia's renewable ocean energy resources. The project aims to utilise a blend of stat ....Harnessing the power of oceans: anchors for floating energy devices. This project aims to establish a geotechnical design framework for shared anchoring systems subjected to multidirectional cyclic loading for large integrated arrays of floating wind turbines and floating wave energy converters. This is expected to facilitate new, economic foundation solutions, generating radical cost savings to help unlock Australia's renewable ocean energy resources. The project aims to utilise a blend of state-of-the-art centrifuge modelling techniques and numerical modelling, incorporating an energy-based method and yield envelopes. This innovative methodology aims to establish a validated framework for understanding and predicting foundation performance under the complex load histories arising in renewable ocean energy applications.Read moreRead less
Predicting the foundation performance of offshore jack-up drilling rigs in intermediate soils. The research outcomes will be a major step forward in creating safer operations of mobile platforms in our challenging seabed conditions. The new models and guidelines will assist engineers in the efficient expansion of our offshore oil and gas industry, with significant increased investment projected over the next five years.
Dynamic evolution of submarine slides and consequences for offshore developments. Oil and gas developments in deep water are at considerable risk from submarine landslides, which may be orders of magnitude larger than onshore landslides. The project will develop new approaches for modelling the initiation and flow kinematics of submarine slides with the aim of quantifying impact forces on offshore infrastructure.
Understanding vibratory piles in sand: installation and lateral response. This project aims to address uncertainties in the design of vibro-driven piles. This promising alternative to impact-driven piles offers faster installation and requires no noise mitigation. The project expects to generate new knowledge of the effect of the installation process in sand on in-service pile response by integrating findings from innovative experiments and numerical modelling. This is particularly important for ....Understanding vibratory piles in sand: installation and lateral response. This project aims to address uncertainties in the design of vibro-driven piles. This promising alternative to impact-driven piles offers faster installation and requires no noise mitigation. The project expects to generate new knowledge of the effect of the installation process in sand on in-service pile response by integrating findings from innovative experiments and numerical modelling. This is particularly important for highly sensitive structures such as offshore wind turbines, which provide a rapidly increasing share of global energy supply. Expected outcomes include practical recommendations for vibro-piles in sand. This should provide sizeable benefits by unlocking vibro-piles as a viable method to reduce offshore wind farm costs.Read moreRead less