Punch-through instability of jack-up on seabed

Journal Article · Mon Apr 01 04:00:00 EST 1985 · J. Geotech. Eng. Div., Am. Soc. Civ. Eng.; (United States)

DOI:https://doi.org/10.1061/(ASCE)0733-9410(1985)111:4(545)· OSTI ID:6275157

Hambley, E C

Punch-through failure of the foundation of an independent leg jackup platform is the uncontrollable penetration of the spudcan into the seabed without increase in deck load. This paper shows how punch-through can also occur as a result of an instability of the structure as a whole, which is analogous to the overturning of a top-heavy ship and to the Euler buckling of an inelastic strut. A small tilt can develop uncontrollably when the tilt causes an increase in reaction on a penetrating leg which is greater than the increase in bearing resistance associated with the added penetration. The instability depends on the weight of the platform, its height above the foundations, the soil profile, and the sequence of jacking and preloading of the legs. It is more likely to occur during preload when the platform has its maximum weight than during operations.

• Research Organization: Edmund Hambly Ltd. Consulting Engrg., Berkhamsted, Hertfordshire
• OSTI ID: 6275157
• Journal Information: J. Geotech. Eng. Div., Am. Soc. Civ. Eng.; (United States), Journal Name: J. Geotech. Eng. Div., Am. Soc. Civ. Eng.; (United States) Vol. 111:4; ISSN AJGEB
• Country of Publication: United States
• Language: English

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