CENTRIFUGE MODEL TEST FOR EVALUATING THE EFFECT OF SEP LEG PENETRATION ON THE SURROUNDING GROUND

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  • SEP船のレグ貫入による周辺地盤の影響評価に関する遠心模型実験

Abstract

<p> During the construction of an offshore wind power generation facility, a SEP vessel lands its four lifting column legs (legs) on the seabed and jacks up its hull above the sea surface. At this time, ground pressure of more than 900 kN/m2 acts on the ground through the legs, so a bearing capacity study is necessary. However, in soft ground such as cohesive soil, the leg penetrates several meters into the ground due to fracture, making it difficult to evaluate the bearing capacity using conventional methods. In addition, if the bottom of the leg is close to a structure, there is concern that the leg may affect the structure. Therefore, We conducted a centrifuge model experiment to simulate the penetration of a leg into the ground to understand the deformation of the ground and the stress state in the ground, with the final objective of proposing a method to evaluate the bearing capacity and the impact on the surrounding ground. This paper reports the results of the centrifuge model tests.</p>

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