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Lattice Leg–Soil Interaction Effects in Deeply Embedded Spudcan Foundations
In the design of foundations for jack-up rigs, the spudcan is typically regarded to be the only foundation elements; the lattice leg is often assumed to have no interaction with the soil. This assumption is used even when the spudcan is penetrated deeply into soft seabed deposits. As such, the lattice leg is often regarded as a purely structural element, with no geotechnical implications. This paper explores lattice leg–soil interaction for deeply embedded spudcans using centrifuge model test data and numerical analyses. The results show that deeply penetrated lattice leg does interact significantly with the surrounding soft, in terms of soil backflow and cavity formation, bearing capacity, lateral load and moment transfer, as well as, possibly, extraction. The degree of interaction is dependent upon the configuration of the lattice; a fully enclosed leg typically interacts much more open lattice. However, even open lattices similar to those generally used in practice have been demonstrated to interact significantly with the surround soft soil. This raises the possibility of optimizing spudcan foundation performance by considering the spudcan and the embedded segment of the leg as a foundation element.
Lattice Leg–Soil Interaction Effects in Deeply Embedded Spudcan Foundations
In the design of foundations for jack-up rigs, the spudcan is typically regarded to be the only foundation elements; the lattice leg is often assumed to have no interaction with the soil. This assumption is used even when the spudcan is penetrated deeply into soft seabed deposits. As such, the lattice leg is often regarded as a purely structural element, with no geotechnical implications. This paper explores lattice leg–soil interaction for deeply embedded spudcans using centrifuge model test data and numerical analyses. The results show that deeply penetrated lattice leg does interact significantly with the surrounding soft, in terms of soil backflow and cavity formation, bearing capacity, lateral load and moment transfer, as well as, possibly, extraction. The degree of interaction is dependent upon the configuration of the lattice; a fully enclosed leg typically interacts much more open lattice. However, even open lattices similar to those generally used in practice have been demonstrated to interact significantly with the surround soft soil. This raises the possibility of optimizing spudcan foundation performance by considering the spudcan and the embedded segment of the leg as a foundation element.
Lattice Leg–Soil Interaction Effects in Deeply Embedded Spudcan Foundations
Lecture Notes in Civil Engineering
Haldar, Sumanta (editor) / Patra, Shantanu (editor) / Ghanekar, Ravindra K. (editor) / Lee, Fook-Hou (author) / Fu, Yong (author) / Li, Yuping (author) / Yi, Jiangtao (author) / Zhang, Xi-Ying (author)
2020-09-04
20 pages
Article/Chapter (Book)
Electronic Resource
English
| Elsevier | 2025
Extraction of jackup spudcan foundations
| British Library Conference Proceedings | 2005