...: current industry approach to upheaval buckling of flexible pipes. available soil models and assumptions to model uplift resistance at large mobilisations including post-peak resistance behaviour as the pipe moves through the rock cover. description of an alternative approach which permits large...

.... (2002) result in predicted soil uplift resistances that are on average 21% and 41% smaller than the resistances measured in the laboratory tests, respectively. The two methods also exhibit large model uncertainties with respective coefficients of variation (COV) of 0.39 and 0.37 for the ratio...

... downward force uplift resistance mobilisation finch displacement piping simulation shutdown loading upheaval midstream oil & gas ASCE-Guidelines ( 1984 ). "Guidelines for the seismic design of oil and gas pipeline systems" , committee on gas and liquid fuel lifelines of the ASCE...

... Abstract Upheaval buckling (UHB) is a common design issue for high temperature buried pipelines. This paper highlights some of the key issues affecting out-of-straightness (OOS) assessment of pipelines. The following factors are discussed; uplift resistance soil models, uplift resistance...

... midstream oil & gas displacement uplift resistance contribution technology conference particle image velocimetry deformation mechanism university of cambridge diameter thusyanthan vertical slip surface model model pipe upstream oil & gas mobilization distance gravel...

... response) but for much faster rates the resisting load drops off significantly. In particular if the pipe moves very rapidly the uplift resistance drops off to almost zero. These results are important as they suggest that if a pipe moves rapidly upward in the soil, for whatever reason, there is a distinct...

... pore pressure gradient excess pore pressure offshore pipeline storm specific gravity pore pressure upstream oil & gas equation assessment otc 19668 backfill accumulation uplift resistance resistance offshore technology conference pipeline flotation Abstract This paper...

... foundation soil strength mat uplift resistance upstream oil & gas strip footing resistance offshore technology conference foundation bearing capacity penetration rotation strength profile platform site investigation psf axis footing OTC 19553 Overturning Analysis of Maleo Jack-Up Mat...

... improvement technique rock dump offshore pipeline backfill material application upstream oil & gas upheaval coflexip stena offshore offshore technology conference backfill soil programme backfill improvement technique cso strength plough resistance uplift resistance otc...

... demonstration of pipeline flotation during backfilling; the validation of a mechanism for cyclic ratchetting in a full-scale laboratory experiment; confirmation that soft clay backfill can be effectively modeled as a frictional material when considering uplift resistance; and derivation of applicable axial...

.... Preliminary design calculations apply a spreadsheet, which compares the required download determined from equation (12) with the actual load that can be mobilised, the sum of the pipeline's submerged weight and the uplift resistance of the cover. The research carried out into uplift resistance in the course...

... offshore pipeline test section loose sand axial friction resistance upheaval strength displacement uplift resistance upstream oil & gas OTe 6486 Soil Response for Pipeline Upheaval Buckling Analyses: Full-Scale Laboratory Tests and Modelling P.E.L. Schaminee and N.F. Zorn, Delft Geotechnics...

... diameter pipelines (16 inch and below) against UPHEAVAL BUCKLING OF OFFSHORE PIPELINES, OVERVIEW AND INTRODUCTION2 trawlgear impact and pull-over, these lines are usually trenched and/or covered for North Sea operations. Due to among others the relatively low bending stiffness, low cover uplift resistance...