Offshore platform integral constructing and hoisting method and special-purpose hoisting machine for the same

Abstract

The invention discloses a method for overall construction and hoisting of an offshore platform and a special crane thereof. The integral platform lower part and platform upper module are respectively built on the ground, and the lower part of the platform is first moved to a designated position in an offshore dock, and then the upper module of the platform is adopted The special crane is integrally hoisted to the lower part of the platform for welding. The special crane has four columns and is fixed to the ground. The two opposite columns are at the same height. The ends are respectively arranged on two opposite columns of the same height. The cross-section of the cross-beam is box-shaped and adopts a variable-section welding structure. A set of lifting mechanisms are provided on both sides of each cross-beam. The platform upper module is constructed on top of the platform, the upper module of the platform is integrated, the upper module is hoisted at one time, the work efficiency is high, the risk is small, and the platform quality is high.

Description

technical field [0001] The invention belongs to the technical field of offshore platform construction, and in particular relates to a method for overall construction and hoisting of an offshore platform and a special crane thereof. Background technique [0002] At present, regardless of the size of the shipyard, the drilling platform is built in sections. First, the lower floating body is built, and then the upper module is lifted by using 100-ton, 300-ton, 500-ton gantry cranes or mobile cranes, or thousands of tons of floating cranes. (Including deck and internal equipment, drilling module, living module, helideck module, deck crane, various life-saving equipment, etc.) To install on the 30-meter-high floating body, dozens or even hundreds of modules need to be installed , After the installation of the structural part is completed, the workers will carry out the welding between the sections, and install the corresponding equipment and materials, and finally carry out the w...

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Problems solved by technology

[0003] 1. Huge modules need to be hoisted multiple times at sea, and multiple hoistings also means doubling the risk, and the hoisting equipment and personnel must be reused many times, which is a huge investment and increases the construction cost of the entire ship. The cycle of multiple hoisting will inevitably lead to the extension of the entire construction period

[0004] 2. After the hoisting of each small segment is completed, segmental closure welding is required. The construction height is tens of meters above the ground, and it is extremely inconvenient for personnel, materials and equipment to go up and down. At the same time, more equipment resources of the shipyard will be occupied, and the production efficiency will be low. , the quality is relatively difficult to guarantee, resulting in a waste of a lot of resources in the shipyard

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