Transition Of Soil Strength During
Suction Pile Retrieval
Author(s)
S. Bang, Y. Cho & K. Jones
Abstract
A field suction pile retrieval test was conducted inside the Okpo Harbor in
southern Korea during the summer of 2003. A steel suction pile was used to
install a permanent embedded anchor in the clay seafloor soil. After the
embedded anchor was installed, the suction pile was retrieved using positive
water pressure inside the pile. The field test provided detailed instrumentation
on the relationship between the applied positive water pressure inside the pile
and the resulting pile pullout. This paper describes the transition of the soil
strength during the suction pile retrieval process.
Keywords: suction pile, retrieval, mobilized soil strength.
1 Introduction
Suction piles have been used with great success in offshore locations in recent
years due to its significant advantages over conventional piles. Wider use of
suction piles in near future is therefore expected. Almost all suction piles
constructed to date are designed as permanent structure. However, it may be
necessary to retrieve such piles due to many reasons, e.g., misalignment of the
pile axis during installation, reuse of the pile at different locations, restoration of
the seafloor for environmental concerns, etc. Therefore, an accurate analytical
solution method needs to be established, providing incremental values of the
correct positive water pressure inside the pile for safe retrieval of suction piles.
This will further expand the utilization of suction piles in offshore and maritime
applications.
Keywords
suction pile, retrieval, mobilized soil strength.
Related Book
Other papers in this volume
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