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List of products by author: C. Paraskevopoulou
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A 3D EPB numerical excavation sequence
Abstract: Urban tunnelling can be a highly challenging process, especially where ground settlement is not tolerated well, and limited environmental disturbance is required. Controlled mechanised tunnelling is usually preferred in such ground environments, specifically Slurry or EPBM, depending on the ground properties. Although analysis of tunnelling is a three-dimensional (3D) problem, conventional...
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Accounting for Uncertainty in Geotechnical Design using a Probabilistic Approach
Abstract: A simple but systematic probabilistic approach was adopted for the preliminary design of an example tunnel alignment for the Egnatia Odos Highway in a heterogenous molasse formation. The purpose of this investigation was to discern sources of geotechnical uncertainty, and evaluate its effect on the output design parameters. Rigorous analyses of the key parameters and factors were undertaken...
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How time-dependency influences the Longitudinal Displacement Profile (LDP) during the construction of deep tunnels
Abstract: During the excavation of a tunnel the accumulated wall displacement and the loading of tunnel support is the result of both the tunnel advance and the time-dependent behaviour of the surrounding rockmass. The current approach to analyze the wall displacement increase is based on the convergence-confinement method performed with either analytical (closed form solutions) or the usage of the...
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Investigation of Rehabilitation Methods of Victorian Tunnels
Abstract: The Victorian tunnels that lie on the British’s railway network have been vital to facilitating a reliable rail service across the UK for the past 150 years. However, some of these tunnels have started to cause some issues for the network. These tunnels were originally constructed using several rings of brick masonry as a lining. After many years, these brick linings have started to degrade and...
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Predicting the long-term behaviour of rock masses in tunneling
Abstract: Being able to predict how the rocks will behave and deform in underground environment over time using practical tools and applied methodologies can lead to design optimization preventing projects delivery delays and cost overruns. Especially in the case of underground nuclear waste repositories where their lifetime is estimated to be over one million years. However, in tunnelling engineering...
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Predicting the long-term behaviour of rock masses in tunneling
Abstract: Being able to predict how the rocks will behave and deform in underground environment over time using practical tools and applied methodologies can lead to design optimization preventing projects delivery delays and cost overruns. Especially in the case of underground nuclear waste repositories where their lifetime is estimated to be over one million years. However, in tunnelling engineering...
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