Numerical analysis of reinstallation of spudcans near footprints formed during prior installations

摘要: Abstract This paper reports the effect of remoulded soil strength a footprint on reinstallation jack-up rigs near footprint. The creation is from an earlier spudcan penetration and extraction process in which remoulded. Dissipation pore pressures between causes further consolidation around Large-deformation finite-element (LDFE) analyses were performed using Coupled Eulerian-Lagrangian (CEL) approach. A recently developed novel shape with flat base four holes studied to mitigate spudcan-footprint interactions during reinstallation. installation whole three-legged rig modelled considering simplified global unit. LDFE results validated against existing centrifuge test data prior undertaking detailed parametric study, assessing effects occurred after creation, offset distance centre, shape. Compared same shape, but virgin intact strength, enhances maximum horizontal force, moment, lateral displacement, rotation, by 12–20%. critical found be one diameter centre being at crest shown effective easing interactions, reducing displacement rotation about 50%; total stress leg 41%.