Cone Penetration Tests (CPTs) in layered soils: a Material Point approach

TY - CONF

T1 - Cone Penetration Tests (CPTs) in layered soils: a Material Point approach

AU - Bird, Robert

AU - Coombs, William M.

AU - Augarde, Charles

AU - Brown, Michael

AU - Sharif, Yaseen

AU - Carter, Gareth

AU - Johnson, Kirstin

AU - Macdonald, Catriona

N1 - © Authors: All rights reserved, 2023

PY - 2023

Y1 - 2023

N2 - Cone Penetration Tests (CPTs) can be used to determine in-situ soil properties and represent a practical choice for site investigation offshore, especially for linear infrastructure, such as offshore wind export cables. Information gained from CPTs is key for predicting soil-structure interaction behaviour, for example when predicting the tow forces involved in seabed ploughing, as the CPT provides an analogue to the process. The numerical modelling of CPTs is challenging due to the significant distortion in the soil displaced by the penetrating cone. This means that solving this sort of problem using finite elements, although not impossible, is numerically tiresome in terms of remeshing and mapping of state variables. Therefore, in this paper we adopt the Material Point Method (MPM) to develop a CPT prediction tool in layered soils. This MPM is combined with a novel non-matching mesh frictional boundary to represent the penetrometer. The developed tool will be used to understand the response of layered soils commonly found offshore as a step towards predicting the interaction of ploughs and anchors with the seabed.

AB - Cone Penetration Tests (CPTs) can be used to determine in-situ soil properties and represent a practical choice for site investigation offshore, especially for linear infrastructure, such as offshore wind export cables. Information gained from CPTs is key for predicting soil-structure interaction behaviour, for example when predicting the tow forces involved in seabed ploughing, as the CPT provides an analogue to the process. The numerical modelling of CPTs is challenging due to the significant distortion in the soil displaced by the penetrating cone. This means that solving this sort of problem using finite elements, although not impossible, is numerically tiresome in terms of remeshing and mapping of state variables. Therefore, in this paper we adopt the Material Point Method (MPM) to develop a CPT prediction tool in layered soils. This MPM is combined with a novel non-matching mesh frictional boundary to represent the penetrometer. The developed tool will be used to understand the response of layered soils commonly found offshore as a step towards predicting the interaction of ploughs and anchors with the seabed.

KW - Anchors

KW - Cable Burial Risk Assessment

KW - Cone penetration test (CPT)

KW - Material point method

UR - https://www.issmge.org/publications/online-library

U2 - 10.53243/NUMGE2023-74

DO - 10.53243/NUMGE2023-74

M3 - Paper

T2 - Numerical Methods in Geotechnical Engineering 2023

Y2 - 26 June 2023 through 28 June 2023

ER -