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Vertical pullout capacity of model batter anchor piles in marine clays
Many offshore structures are subjected to overturning moments due to wind load, wave pressure, and ship impacts. For foundations in such structures, usually a combination of vertical and batter piles is used. Little information is available in the literature about estimating the capacity of piles under uplift. In cases where these supporting piles are not vertical, the behavior under vertical pullout is not well established. In this article the vertical pullout behavior of batter piles is examined through an experimental investigation carried out on model batter anchor piles. The tests are conducted on model aluminum pipe piles of 19 mm diameter with different embedment ratios in a soft marine clayey bed at different consistencies and with various batter angles of 0°, 10°, 20°, and 30°. Results indicate that the pullout capacity of a batter pile is less than that of a vertical pile. This reduction is explained in terms of reduced area available for skin friction. Based on this, pullout behavior of batter anchor piles is described as “short anchor” and “long anchor” failures. However, with increase in the embedment length, the capacity of batter pile remains unaffected.
Vertical pullout capacity of model batter anchor piles in marine clays
Many offshore structures are subjected to overturning moments due to wind load, wave pressure, and ship impacts. For foundations in such structures, usually a combination of vertical and batter piles is used. Little information is available in the literature about estimating the capacity of piles under uplift. In cases where these supporting piles are not vertical, the behavior under vertical pullout is not well established. In this article the vertical pullout behavior of batter piles is examined through an experimental investigation carried out on model batter anchor piles. The tests are conducted on model aluminum pipe piles of 19 mm diameter with different embedment ratios in a soft marine clayey bed at different consistencies and with various batter angles of 0°, 10°, 20°, and 30°. Results indicate that the pullout capacity of a batter pile is less than that of a vertical pile. This reduction is explained in terms of reduced area available for skin friction. Based on this, pullout behavior of batter anchor piles is described as “short anchor” and “long anchor” failures. However, with increase in the embedment length, the capacity of batter pile remains unaffected.
Vertical pullout capacity of model batter anchor piles in marine clays
Veeresh, C. (author) / Rao, S. Narasimha (author)
Marine Georesources & Geotechnology ; 14 ; 205-215
1996-01-01
11 pages
Article (Journal)
Electronic Resource
Unknown
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