Foundation analysis for tension leg platforms

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6961263

Isenhower, W M

Tension leg platforms are being developed for offshore oil production in water depths of up to 6000 ft. The foundations for tension leg platforms will be pile groups with loadings that are continuously tensile an cyclic. A review of ultimate static capacity of piles in tension and performance of piles under cyclic loading was made. Special attention was given to the cyclic shearing behavior of the supporting soil and the interface between the soil and pile. Pile groups used for tension leg platforms will have closely spaced piles which will have significant pile-soil-pile interaction. An extension to the hybrid method of group pile analysis was developed to account for cyclic loading. A parameter study was performed to identify important factors affecting group pile performance. The factors studied were pile length, pile diameter, axial pile stiffness, spacing of piles, number of pile in the group, and level of loading. Thirty five analyses were performed using soil profiles representative of the Gulf of Mexico and the North Sea.

• Research Organization: Texas Univ., Austin (USA)
• OSTI ID: 6961263
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ATLANTIC OCEAN
CARIBBEAN SEA
DESIGN
DIMENSIONS
DYNAMIC LOADS
FOUNDATIONS
GULF OF MEXICO
INTERFACES
MECHANICAL STRUCTURES
NORTH SEA
OFFSHORE PLATFORMS
SEAS
SOIL-STRUCTURE INTERACTIONS
SOILS
STATIC LOADS
STRESS ANALYSIS
SUPPORTS
SURFACE WATERS