First, suction piles were raised with support for stability control and rotation of the structure on the roof of the transport shaft.
Satellite geo-positioning technology was used for the approximation, positioning and orientation of the first section of the substructure, ensuring its precise placement in the installation coordinates on the seabed.
Once in position, the marine settlement was carried out using suction pumps equipped with the latest technology, allowing the piles to be fixed up to a design penetration of 10 meters.
During these operations, dive operations support was crucial. These include the disconnection of strobes in the first section of the substructure, the recovery of the suction pumps and the satellite geo-positioning equipment.
Arrival of a transport chariot and boating to the Blue Giant crane boat
Preparations were carried out for the support of the second section of the substructure, installation of an arrangement for rotation control and marine safety cuts.
Then, the horizontal lifting with a weight of 270 tons was carried out on the chalan roof.
Once the structure was stabilized, it was lifted - vertical lifting. Up ending—.
The Blue Giant boat was approached with a second section of the substructure about to be installed, then a second section was assembled on the first lower section of the substructure. All this is accompanied by diving operations for mechanical assembly monitoring.
Subsequently, the injection of Grout in pile interface and substructure.
Preparations
Once the process described above was carried out, the transfer of personnel, oxycutting equipment tools and manual tools to the transport deck was carried out for the preparations for connecting the strobes to the boat crane, as well as the connection of the lifting rocker arm to the main block of the crane.
Once this was done, progress was made to:
- Lifting arrangements on the second level of the superstructure.
- Verification of the superstructure by marine warranty personnel and SUBTEC prior to the removal of marine insurance.
- Marine safety cut off the axle of the superstructure.
- The operation was supervised by specialized personnel and was carried out by BLUE MARINE SUBTEC specialist personnel.
- Vertical lift and 90-degree rotation to remain in the final installation position.
As an end point, the Blue Giant crane boat approached with a suspended structure and controlled descent to generate the coupling of a substructure with a superstructure.
In conclusion, SUBTEC thanks the integrated team that participated in the development of this innovative project, for their commitment, effective dedicated effort and safe execution.
