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Influence of the scour on laterally loaded piles
S. Narasimha Rao, Jay S. Mani
Published in
2008
Volume: 5
   
Pages: 3283 - 3288
Abstract
Marine structures like jetties and offshore platforms are constructed on pile foundations. These piles are subjected to significant amounts of lateral loads due to wind, waves and currents. Pile foundations in coastal areas are subjected to scour, imposing additional lateral loads on piles and there are a few cases of failures which can be attributed to scour. In soft clays and sands, scouring can bring significant reduction in the lateral capacity of the piles. Tests are conducted on model pipe piles made up of PVC and Aluminum of outer diameter (D) of 50 mm and length to diameter, L/D ratio of 20. Pile material has been varied to suit the approximate rigidity of piles in the field. Lateral capacities of piles are estimated for eccentricity ratios of 3, 4 and 5 and consistencies of 0.32, 0.48 and 0.60. Eccentricity ratio represents the height of load application. From the earlier studies carried out it has been established that in soft clays the ultimate scour depth, Su can be Su/D=1.0. Tests have been repeated on clay bed with preformed scour hole around the pile. In general marine soils are under submerged condition. Some the tests are repeated with submerged condition. Finite element model of pile and soil is generated. The experimental results are in well agreement with FEM.
About the journal
Journal12th International Conference on Computer Methods and Advances in Geomechanics 2008
Open AccessNo
Concepts (28)
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    Coastal area
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    Eccentricity
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    ECCENTRICITY RATIOS
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    Finite element models
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    L/d ratio
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    LATERAL CAPACITY
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    Lateral loading
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    Lateral loads
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    Laterally loaded pile
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    LOAD APPLICATION
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    MARINE SOILS
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    OFF SHORE PLATFORMS
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    Outer diameters
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    Scour depth
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    Scour holes
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    Soft clays
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    SUBMERGED CONDITION
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    Aluminum
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    DRILLING PLATFORMS
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    Finite element method
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    Geomechanics
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    Loading
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    OFFSHORE STRUCTURES
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    Pile foundations
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    Polyvinyl chlorides
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    Scour
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    Underwater soils
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    Piles