Closing method of cantilever beam

Abstract

The invention provides a folding method of a cantilever beam. The folding method comprises the following steps of performing ballast adjustment on a main hull which floats in the water so as to enable the gravity of the main hull to adapt to the gravity of the main hull after the cantilever beam to be assembled is folded in place; dragging the main hull after the ballast adjustment into a dock to be near a vertical wall of the dock; adjusting the water level in the dock so as to enable the main hull which floats in the static water of the dock to be aligned to the vertical direction of the cantilever beam, adjusting the lateral direction of the main hull so as to perform the lateral alignment on the main hull and the cantilever beam and fixing the main hull; enabling the cantilever beam to slide towards the main hull which is fixed at the position of the dock and performing the ballast adjustment on the main hull along with the sliding of the cantilever beam until the cantilever beam slides to a set position in the main hull. According to the folding method of the cantilever beam, the folding accuracy can be improved and the friction damage to the cantilever beam in the sliding process is greatly reduced.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to a method for closing a cantilever beam. Background technique [0002] Ocean engineering equipment has a large number of parts and is bulky, and its assembly accuracy is high. Generally, the vertical error is required to be no more than a few millimeters, and the horizontal error is no more than 20 millimeters, which makes the traditional assembly method more and more difficult. Adapt to the development of existing ocean engineering equipment. [0003] Taking the closing of the cantilever beam and the main hull of the jack-up drilling platform as an example, in the construction of the existing jack-up drilling platform, it is necessary to close the cantilever beam and the main hull to complete the construction of the whole ship. Most of the existing cantilever beams and main hull closing methods adopt the segmented lifting and closing method, that is, the cantilever beam is divi...

AI Technical Summary

Problems solved by technology

[0005] One object of the present invention is to solve the defects of the prior art that the closing accuracy of the cantilever beam and the main hull of the jack-up drilling platform is low and there is a large amount of frictional damage during the sliding process of the cantilever beam;

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