Searched for: author:"Vardon, P.J."
(1 - 20 of 81)

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Jamalinia, E. (author), Vardon, P.J. (author), Steele-Dunne, S.C. (author)
Climatic conditions and vegetation cover influence water flux in a slope which affect the pore water pressure and self weight, hence its stability. High evapotranspiration and low precipitation rates during summer cause dry soil with low soil moisture (SM) that leads to soil shrinkage, which leads to cracking and reduced shear strength, which...
conference paper 2020
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Vardon, P.J. (author), Peuchen, J. (author)
Obtaining in situ thermal properties of soils is often difficult and time-consuming. Here, cone penetration test (CPT) correlations are proposed and validated for thermal properties of saturated ground, i.e. thermal conductivity and volumetric heat capacity, giving continuous profiles of the parameters, in a substantially reduced time. The...
journal article 2020
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Jamalinia, E. (author), Vardon, P.J. (author), Steele-Dunne, S.C. (author)
The stability of a dike is influenced strongly by its water content, via both changing its weight and strength. While safety calculations using both analytical and numerical methods are well studied, the impact of surface boundaries exposed to natural conditions is rarely considered, nor is the fact that this surface is covered in vegetation and...
journal article 2020
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Kulshreshtha, Y. (author), Mota, Nelson (author), Jagadish, Kaup S. (author), Bredenoord, Jan (author), Vardon, P.J. (author), van Loosdrecht, Mark C.M. (author), Jonkers, H.M. (author)
There is an enormous demand for rural housing in India that needs to be catered for within a short span of time. Building with earth (mud) is proposed as an economical and environmental friendly alternative due to the rising costs of conventional building materials. However, the construction of earthen houses has significantly declined in...
journal article 2020
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Jamalinia, E. (author), Vardon, P.J. (author), Steele-Dunne, S.C. (author)
The stability of a dike is influenced strongly by its water content, via changes in effective stress and weight. While flow through porous media is relatively well understood, water flux in and out of a dike through a vegetated surface is not as well understood. This paper presents a numerical study of the Soil-Vegetation-Atmosphere (SVA)...
journal article 2019
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Vardon, P.J. (author), Baltoukas, Dimitris (author), Peuchen, J. (author)
The thermal cone penetration test (T-CPT) allows in situ measurement of the thermal properties of soil during a CPT-that is without withdrawing the CPT tool and introducing another tool such as a thermal needle probe. An interpretation method is presented based on one-dimensional axisymmetric analytical solutions. Numerical verification of...
journal article 2019
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Zhao, Xuanyu (author), Bolognin, M. (author), Donfang, Lian (author), Rohe, A. (author), Vardon, P.J. (author)
This paper describes the development and application of inflow and outflow boundary conditions (BCs) for the material point method (MPM) in order to simulate fluid flow problems. This corresponds to velocity and pressure controlled BCs. Due to the coupled Lagrangian and Eulerian description of the fluid motion in MPM it is necessary to add and...
journal article 2019
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Varkey, D. (author), Hicks, M.A. (author), Vardon, P.J. (author)
An improved method for the reliability analysis of 3D slopes has been proposed based on the semi-analytical method of Vanmarcke (1977). Comparing the predicted responses of an idealised 3D slope obtained by the more general, albeit computationally intensive, random finite element method (RFEM), and the original semi-analytical method showed that...
conference paper 2019
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Remmerswaal, G. (author), Hicks, M.A. (author), Vardon, P.J. (author)
The material point method (MPM) is used to model both rotational and horizontal sliding failure mechanisms of dykes under external (water) loading. To model the different failure mechanisms, an external hydrostatic water pressure has been applied on the canal side of the dyke by applying a newly developed boundary condition. The boundary...
conference paper 2019
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Vardon, P.J. (author)
other 2019
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Gonzalez Acosta, J.L. (author), Zheng, X. (author), Vardon, P.J. (author), Hicks, M.A. (author), Pisano, F. (author)
Stress oscillations in the material point method (MPM) are one of the major reasons unrealistic results are obtained. In this paper an investigation of the stress oscillations occurring when using one- and two-phase approaches is performed. Specifically, an axisymmetric benchmark and a two-dimensional plane strain problem are used to demonstrate...
conference paper 2019
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de Gast, T. (author), Vardon, P.J. (author), Hicks, M.A. (author)
Measuring soil variability has many challenges. One of the challenges is soil deformation, which can change the spatial correlation structure arising from the original geological processes. In particular, this is important in the assessment of existing structures. In this paper, the effect of existing structures on the horizontal spatial...
conference paper 2019
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Duvvuru Mohan, V.K. (author), Vardon, P.J. (author), Dusic, Milorad (author), van Gelder, P.H.A.J.M. (author), Hicks, M.A. (author), Burgazzi, Luciano (author)
Nuclear power plants are exposed to a variety of hazards, which may result in risks (the product of the likelihood of the hazard and resulting consequence). One of the key objectives of the NARSIS project is to improve the integration of external hazards and their consequences with existing state-of-the-art risk assessment methodologies in the...
report 2019
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Mota, Nelson (author), van Loosdrecht, Mark C.M. (author), Jonkers, H.M. (author)
With rapid industrialisation and the increase in popularity of concrete and brick constructions, a decline in earth houses has been observed especially in the rural areas of India. A survey was carried out in five regions of India to understand the technical and social factors favouring/limiting the construction and everyday use of earth houses....
book chapter 2019
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Liu, K. (author), Vardon, P.J. (author), Hicks, M.A. (author)
Internal erosion, or piping, has been attributed as a major cause of dam and embankment failures. Most prediction models for predicting piping use the hydraulic gradient between the upstream and downstream water levels as an indicator. No explicit consideration is made regarding preferential pathways, although piping usually initiates from a...
journal article 2019
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Varkey, D. (author), Hicks, M.A. (author), Vardon, P.J. (author)
An improved semi-analytical method for calculating the reliability of 3D slopes with spatially varying shear strength parameters is proposed. The response of an existing semi-analytical method has been compared with that of the computationally more intensive, but more general, random finite element method (RFEM), demonstrating that the simpler...
journal article 2019
document
Remmerswaal, G. (author), Bolognin, M. (author), Vardon, P.J. (author), Hicks, M.A. (author), Rohe, A. (author)
This paper describes current work on the implementation of non-trivial boundary conditions (BCs) for improving the general applicability of the Material Point Method (MPM) to geotechnical boundary values problems. It summarises novel boundary treatments (non-trivial BCs) in MPM for (i) flow conditions, as well as (ii) the application of a...
conference paper 2019
document
Gonzalez Acosta, J.L. (author), Vardon, P.J. (author), Remmerswaal, G. (author), Hicks, M.A. (author)
Stress inaccuracies (oscillations) are one of the main problems in the material point method (MPM), especially when advanced constitutive models are used. The origins of such oscillations are a combination of poor force and stiffness integration, stress recovery inaccuracies, and cell crossing problems. These are caused mainly by the use of...
journal article 2019
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Duvvuru Mohan, V.K. (author), Vardon, P.J. (author), Hicks, M.A. (author), van Gelder, P.H.A.J.M. (author)
Bayesian networks are proposed as a tool to integrate reliability and influential variables relating to the slope stability of an idealized embankment. The site investigation (extent) and slope geometry, as well as the material properties and their spatial variability, are considered within a Bayesian network. The random finite element method ...
conference paper 2019
document
Jamalinia, E. (author), Vardon, P.J. (author), Steele-Dunne, S.C. (author)
Climatic conditions and vegetation cover influence the water flux in a dike body, which affect the effective stress and self-weight, hence its stability. The vegetation is the intermediate layer between the atmosphere and the soil, and therefore this layer influences the boundary water flux by transpiration and leaf interception, so considering...
abstract 2019
Searched for: author:"Vardon, P.J."
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