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Liaudat, J. (author), Dieudonné, A.A.M. (author), Vardon, P.J. (author)Geological Disposal Facilities (GDF) for radioactive waste will generally rely on clay-rich materials as a host geological formation and/or engineered barrier. Gas will be produced within the GDF, which can build up significant gas pressure and will activate the migration of gas through the clay materials via different transport mechanisms....journal article 2023
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Guo, Y. (author), Golchin, A. (author), Hicks, M.A. (author), Liu, Songyu (author), Zhang, Guozhu (author), Vardon, P.J. (author)The effect of temperature on the monotonic and cyclic shearing response of a soil–structure interface is of critical importance for the application of thermal-active geo-structures. To investigate this, soils and soil–concrete interfaces were comprehensively tested with a temperature-controlled direct shear device under both fixed...journal article 2023
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Mohsan, M. (author), Vardon, P.J. (author), Vossepoel, F.C. (author)Data assimilation methods have been implemented on a slope stability problem, and the performance of different constitutive models and data assimilation schemes has been investigated. In the first part, a data assimilation scheme called the ensemble Kalman filter (EnKF) is implemented using a finite element model (FEM) and its performance with...conference paper 2023
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Do, Phuong Chinh (author), Vardon, P.J. (author), Gonzalez Acosta, J.L. (author), Hicks, M.A. (author)The material point method (MPM) is gaining an increasing amount of attention due to its capacity to solve geotechnical problems involving large deformations. Large deformations in geotechnics usually involve the failure process and therefore dynamic analyses are often carried out. However, simulating the (infinite) continuous domain using...conference paper 2023
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Meesters, G.M.H. (author), van Loosdrecht, Mark C.M. (author), Mota, Nelson (author), Jonkers, H.M. (author)The water-resistance of cow-dung has made it a widely used stabiliser in traditional earthen structures in several Asian and African countries. Multiple studies have shown an improvement in water-resistance with the addition of cow-dung, but none provides insight into this behaviour. The present study investigates the water-resistance behaviour...journal article 2022
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- Liaudat, J. (author), Dieudonné, A.A.M. (author), Vardon, P.J. (author) conference paper 2022
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Bloemendal, Martin (author), van Esch, M.S. (author), Vardon, P.J. (author), Pape, J. J. (author), Hartog, N. (author)Governments and companies have set high targets in avoiding CO2 emissions and reducing energy. Aquifer Thermal Energy Storage (ATES) systems can contribute by overcoming the temporal mismatch between the availability of sustainable heat (during summer) and the demand for heat (during winter). Therefore, ATES is an increasingly popular...journal article 2022
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Li, Yajun (author), Li, Jianguang (author), Xu, Nengxiong (author), Fenton, Gordon A. (author), Vardon, P.J. (author), Hicks, M.A. (author)Correlation length or scale of fluctuation (SOF) is often used as a primary parameter in defining the spatial correlation characteristics of varying soil properties. However, geotechnical site investigations are rather limited so that proper determination of correlation length is not always possible. The concept of a worst-case correlation...journal article 2022
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Golchin, A. (author), Vardon, P.J. (author), Hicks, M.A. (author)The formulation of a new thermo-mechanical constitutive model consistent with the principles of thermodynamics is presented. The model is capable of predicting the rate-independent thermo-mechanical behavior of fine-grained soils. The constitutive equations are derived by defining only a Gibbs-type free energy and a dissipation potential, in...journal article 2022
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Varkey, D. (author), Hicks, M.A. (author), Vardon, P.J. (author)This paper investigates the influence of three forms of uncertainty on the probabilistic stability of an idealised 3D embankment slope. These are: 1D spatial variability in the external geometry of the slope along its length, 2D spatial variability in the depth of the boundary between the embankment material and the foundation layer, and 3D...journal article 2022
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Golchin, A. (author), Vardon, P.J. (author), Hicks, M.A. (author)The formulation of a two surface/bubble thermo-mechanical constitutive model consistent with the principles of thermodynamics is presented. This allows plastic deformations inside the outer yield surface, resulting in a smooth stress–strain prediction and progressive cyclic deformations. This is achieved by the translation of the inner yield...journal article 2022
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Barciela Rial, M. (author), Vardon, P.J. (author), van Kessel, Thijs (author), Griffioen, Jasper (author), Winterwerp, J.C. (author)Progressively, more dredged sediments are being reused for engineering projects. For example, the Marker Wadden is a new wetland constructed in lake Markermeer, the Netherlands, with dredged cohesive sediments originating from the bed of the lake. Such dredged sediments are often dominated by cohesive sediment particles with varying amounts of...journal article 2022
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Zheng, X. (author), Pisano, F. (author), Vardon, P.J. (author), Hicks, M.A. (author)This study presents the formulation and implementation of a fully implicit stabilised Material Point Method (MPM) for dynamic problems in two-phase porous media. In particular, the proposed method is built on a three-field formulation of the governing conservation laws, which uses solid displacement, pore pressure and fluid displacement as...journal article 2022
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- Chandan Malagar, B.R. (author), Vardon, P.J. (author), Dieudonné, A.A.M. (author) poster 2022
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Luo, W. (author), Vardon, P.J. (author), Cox, Barbara (author), Dieudonné, A.A.M. (author)and boundary connected with aquifer respectively, are discussed. On the basis of these two boundary conditions, several factors that influence the fluid loss process are studied. For the thief zone with no-flow boundary, our key conclusions illustrate that once the pressure front reaches an opening in the sealing, fluid loss occurs. However,...abstract 2022
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van Esch, M.S. (author), Bloemendal, Martin (author), Hartog, Niels (author), Vardon, P.J. (author)Aquifer Thermal Energy Storage (ATES) is mostly used to store heat and cold in groundwater at relatively low temperatures for heating and cooling buildings. These systems emit 3-4 times less CO2 when compared to gas heating, but still require substantial amounts of electricity to run due to the use of a heat pump ( 60%). In typical ATES systems...abstract 2022
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Kolah Kaj, P. (author), Abels, H.A. (author), Barnhoorn, A. (author), Vardon, P.J. (author), Kwee, Jasper (author), Buik, Nick (author), de Vries, Sjoukje (author), Drury, Martyn (author), van Eindthoven, Wijnand (author)The ambition is to significantly enhance the knowledge, mapping, and prediction of the geological character of Dutch geothermal plays, focussing on thermal and geomechanical properties. The aim is to improve fundamental understanding of the geological causes behind rock properties, the understanding and quantification of the conversion of...abstract 2022
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Zheng, X. (author), Pisano, F. (author), Vardon, P.J. (author), Hicks, M.A. (author)The Material Point Method (MPM) has been gaining increasing popularity as an appropriate approach to the solution of coupled hydro-mechanical problems involving large deformations. This study extends the implicit GIMP-patch method for coupled poroelastic problems recently proposed by Zheng et al. (2021b) to tackle large-deformation problems...journal article 2022
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Chotkan, S.A. (author), van der Meij, Raymond (author), Klerk, Wouter Jan (author), Vardon, P.J. (author), Aguilar Lopez, J.P. (author)In this paper, we aim to identify factors affecting susceptibility to drought-induced cracking in levees and use them to build a machine learning model that can identify crack-prone levees on a regional scale. By considering the key relationship between the size of cracks and the moisture content, we observed that low moisture contents act as...journal article 2022
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Chicco, Jessica Maria (author), Antonijevic, Dragi (author), Bloemendal, Martin (author), Cecinato, Francesco (author), Goetzl, Gregor (author), Hajto, Marek (author), Hartog, Niels (author), Mandrone, Giuseppe (author), Vacha, Damiano (author), Vardon, P.J. (author)For efficient operation of heating and cooling grids, underground thermal energy storage (UTES) can be a key element. This is due to its ability to seasonally store heat or cold addressing the large mismatch between supply and demand. This technology is already available and there are many operational examples, both within and outside a...conference paper 2022