Failure mechanisms of a spudcan penetrating next to an existing footprint  

作　　者：Vickie Kong Mark J.Cassidy Christophe Gaudin 

机构地区：[1]Fugro-Advanced Geomechanics [2]Centre for Offshore Foundation Systems and ARC CoE for Geotechnical Science and Engineering,University of Western Australia

出　　处：《Theoretical & Applied Mechanics Letters》2015年第2期64-68,共5页力学快报（英文版）

基　　金：supported as a primary node of the Australian Research Council Centre of Excellence for Geotechnical Science and Engineering(CE110001009)

摘　　要：Reinstallation of mobile jack-up rigs next to existing footprints is a problematic operation because the spudcan located near the footprints is subjected to eccentric and/or inclined loading conditions. Geotech- nical centrifuge studies have measured these loads for combinations of changing footprint geometry, footprint soil properties and the offset of the reinstallation from the footprint centre. These tests have been of full model spudcans in order to accurately measure the combined loads developed. They have not provided information on the mechanisms of failure occurring during this complex installation. Ob- servations from a visualisation test, where a half spudcan is penetrated against a transparent window in a geotechnical centrifuge, are reported in this paper. The mechanisms of failure at different stages during the nenetrntirm are nr^ntedReinstallation of mobile jack-up rigs next to existing footprints is a problematic operation because the spudcan located near the footprints is subjected to eccentric and/or inclined loading conditions. Geotech- nical centrifuge studies have measured these loads for combinations of changing footprint geometry, footprint soil properties and the offset of the reinstallation from the footprint centre. These tests have been of full model spudcans in order to accurately measure the combined loads developed. They have not provided information on the mechanisms of failure occurring during this complex installation. Ob- servations from a visualisation test, where a half spudcan is penetrated against a transparent window in a geotechnical centrifuge, are reported in this paper. The mechanisms of failure at different stages during the nenetrntirm are nr^nted

关 键 词：Jack-up Footprint Combined loading Spudcan Offshore geotechnics 

分 类 号：TE951[石油与天然气工程—石油机械设备]