Method for fabricating a gravity-based structure (GBS) at a specialized fabrication site

A method for fabricating a gravity-based structure (GBS), comprising:

• assembling a first reinforcement cage for a rectangular base slab,
• installing a first formwork and then concreting the base slab,
• assembling, as separate sections of the base slab are concreted, second reinforcement cages for inner walls and outer walls and concreting the inner walls and the outer walls by slipforming,
• assembling, as separate wall sections are concreted, a third reinforcement cage for a main top slab,
• installing a second formwork and then concreting the main top slab, and
• post-tensioning with reinforcement strands the main top slab and the base slab, as well as the inner walls and the outer walls,
• wherein the GBS is fabricated including a central part and protruding part that have the common base slab, besides the inner walls and the outer walls as well as the main top slab are concreted for the central part of GBS, that takes form of a rectangular prism, as separate sections of the outer walls of the central part are concreted,
• a fourth reinforcement cage is assembled, a third formwork is installed and concreting is performed for the inner walls and the outer walls of the GBS protruding part,
• the outer walls of the GBS protruding part are made along a perimeter of the base slab, and at the same time a height of the outer walls of the protruding part is lower than a height of the outer walls of the central part, as separate wall sections of the protruding part are concreted,
• a fifth reinforcement cage is assembled and a fourth formwork is installed for an additional top slab of the protruding part and then concreted, and the base slab and the main top slab, as well as the inner walls and the outer walls of the central part and protruding part are post-tensioned as the main top slab and the additional top slab are concreted and the concrete of the post-tensioned structures is cured.