The penetration of the legs depends on the seabed type and its characteristics. Jetting systems are used to liberate the legs from the mud, when departing from the location. If Jackup is elevated on a location with a soft seabed, the penetration through the soil will be deep. It might be challenging to release the […]
When a jack-up vessel is elevated, it is subjected to various adverse forces that need to be considered. The legs of the jack-up barge play a crucial role in resisting these forces and ensuring the stability. Wind and sea: When the barge is elevated, it is exposed to the forces of wind and sea. The
When the hull is elevated, its weight is transfered through the rack to the pinions and jacking tower. Due to the slight movement caused by weather elements, weight is burdening the pinions, especially lower ones. The same happens when jackup is in afloat condition, and legs are raised. Horizontal movement of the legs is affecting
RPD is the measurable difference in the vertical position of the chords relative to one another within a lattice leg. It occurs due to an uneven loading of the leg chords when the spud can is unevenly supported or when the spud can is subject to a lateral (horizontal) load. The uneven loading in a
Pinions are an essential component of jackup barge legs, and their design can significantly impact the stability of the platform. Depending on the leg design, pinions could be installed in two ways: RADIAL and OPPOSED. Radial pinions have only one rack on each chord, where pinions are installed only on one side. In contrast, opposed
Every jackup leg is equipped with a set of guides. These ensure the leg doesn’t move horizontally, while allowing vertical movement. By restricting horizontal movement, the guides keep the leg in place, allowing travel only in an upward or downward direction. Guides are typically made of robust steel, attached to the leg tower. Their
The footings of a jack-up barge (also known as spud cans or pads), are steel supports located at the base of each leg. Spud cans interface directly with the seabed. When the legs are extended to the sea floor, the spud cans act as temporary foundations for the structure, providing both vertical and horizontal support,
Jack-up barges, due to their diverse applications, predominantly feature two design types for their legs: CYLINDRICAL (tubular) and TRUSSED (lattice). Thrussed (Lattice) leg Cylindrical (Tubular) legs The cylindrical leg design is characterized by its simplicity – such legs are hollow steel tubes. This is a more traditional design, commonly seen on jack-ups operating in shallow
PLEASE DO NOT COPY CONTENT FROM THIS WEBSITE.
Contact the author and ask for permission.