Hoisting method for large-span deck segment

Abstract

The invention discloses a hoisting method of a large-span deck subsection, which comprises the following steps of: constructing the deck subsection in an inverse state, and constructing a scaffold onthe reverse side of the deck subsection; constructing a structural finite element model of the deck segment, and constructing a chuck corresponding to the scaffold on the reverse side of the model; performing lifting ring designing according to the front-back turnover mode and the left-right turnover mode, constructing lifting point translation constraints corresponding to the lifting rings in themodel, applying downward inertia loads, model stress calculation is conducted, and therefore a first deformation graph and a first stress graph of the deck subsection are obtained; and selecting a turnover mode with small deformation and stress to turn over the deck subsection. According to the method, the deck is reasonably prevented from generating overlarge hoisting deformation, and finally the carrying precision of the large-span deck subsections is guaranteed.

Description

technical field [0001] The invention belongs to the field of shipbuilding, and in particular relates to a segmented hoisting method for a large-span deck. Background technique [0002] A middle deck of a cruise ship. Since it does not need to bear too much vertical weight, it adopts a lightweight design when designing. The deck is made of 6.5mm thick A-grade steel, and the frame is made of 480mm high T row and 120mm high spherical flat steel. The material is also grade A steel. [0003] When building similar ships in the past, due to the weak bending resistance of the main body structure of this type of deck, and because there is still a lot of work to be done on the reverse side of the deck, it is necessary to hang scaffolding poles and full scaffolding boards under the deck before hoisting, so when hoisting Will easily produce large deformation. With the development of shipbuilding technology, most of the sections adopt the no-surplus construction method, leaving a compe...

AI Technical Summary

Problems solved by technology

[0003] When building similar ships in the past, due to the weak bending resistance of the main body structure of this type of deck, and because there is still a lot of work to be done on the reverse side of the deck, it is necessary to hang scaffolding poles and full scaffolding boards under the deck before hoisting, so when hoisting Will be prone to large deformation

With the development of shipbuilding technology, most of the sections adopt the no-surplus construction method, leaving a compensation value of 10mm at most. Therefore, when the upper section is loaded, it is impossible to make up for the level of the deck by trimming a large number of allowances in the high and low directions. Out of tolerance, resulting in the height gap between the upper section wall and the deck far exceeding the 10mm allowed by the standard

In order to meet the requirements of assembly specifications, only a large number of plate replacement and horizontal correction work can be carried out, which will eventually cause a large waste of manpower and material resources, and the effect is not ideal

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