Bearing capacity of hybrid suction foundation on sand with loading direction via centrifuge model test

Abstract

Suction caisson is widely used to support offshore structure. However, this type of foundation may not provide sufficient resisting capacity economically under external loads. Recently, to give an increased capacity on the foundation, hybrid foundation concept was proposed to satisfy engineering needs as well as cost reduction of structures. Hybrid foundation concept is combination of skirted mat and suction caisson (s). Suction caisson (s) is fitted on the mat foundation intended to increase load capacity. This paper investigates the behavior of a hybrid suction foundation installed in sand layer for vertical and lateral loads, respectively. A series of centrifuge test have been conducted to assess the load capacity of the hybrid foundation and compared to those of the conventional single suction caisson. The primary goal of this study is to comprehend the effect of the mat compartment on foundation behavior under loading directions, and corresponding bearing capacity. Finally, feasibility of the hybrid foundation for offshore foundation was confirmed.

Investigating the monotonic behaviour of hybrid tripod suction bucket foundations for offshore wind towers in sand

“…The hybrid foundation concept has been considered in past studies for OWTs, for example these can be a combination of single suction buckets (Fig. 1a), multiple suction buckets [26][27][28] (Fig. 1b) or mono-pile foundations (Fig.…”