A Construction Method for Renewing the Deck Longitudinals of Upper Side Tanks of Bulk Carriers

Abstract

The invention provides a construction method for replacing deck longitudinal beams of an upper edge cabinet of a bulk cargo ship. The construction method for replacing the deck longitudinal beams of the upper edge cabinet of the bulk cargo ship comprises the following steps that transverse reinforcing plates are welded to a main deck corresponding to the upper edge cabinet at intervals; ventilation technological holes are formed in the positions, close to a cargo hold cover, of the main deck; shuffling technological holes are formed in the positions, close to the sides of the ship, of the main deck; a scaffold is erected in the upper edge cabinet, and a storage platform is built in the upper edge cabinet; a plurality of protection split heads are welded along the deck longitudinal beams at intervals; the first deck longitudinal beam is cut, transferred onto the storage platform after falling onto the split heads, and then cut according to the required length, and longitudinal beam sections are hoisted out of a cargo hold through a hoisting device; the rest of the deck longitudinal beams are cut sequentially into sections to be transferred out of the cargo hold; new deck longitudinal beams are hoisted into the cargo hold to be assembled, positioned and welded; and after construction is completed, auxiliary facilities are cut and dismantled, and the technological holes are filled. By the adoption of the construction method, the large-length single longitudinal beam sections can be transferred out of the cargo hold, and the problem that a ship body possibly deforms in the construction process is solved.

Description

technical field [0001] The invention relates to a construction method for repairing a bulk carrier, in particular to a construction method for replacing a longitudinal frame of a side tank deck on a bulk carrier. Background technique [0002] Bulk carrier is the abbreviation of bulk carrier, which is specially used to transport unpackaged goods, such as coal, ore, timber, livestock, grain, etc. Bulk carriers are usually equipped with multiple cargo holds, and cargo doors are set on the main deck of the hull, and the cargo holds below the main deck are entered from the doors. Tank (also called topside tank), the upper tank is composed of topside tank sloping roof, ship side plate, main deck enclosure, the inner deck longitudinal of the upper tank and the transverse inner frame vertically intersecting with the deck longitudinal jointly form an effective inner support. The bottom of the cargo hold is also provided with bilge and hopper tanks (also known as lower side cabinets...

AI Technical Summary

Problems solved by technology

[0003] The previous maintenance experience was to replace the deck and deck longitudinals at the same time, but this time the shipowner requested to replace 220 tons of deck longitudinals but not to replace the deck, and the single section of the new deck longitudinals should not be less than 4 meters, and the single weight is 363kg. This is unlucky by manpower. How to clean up and get in and out of the cargo hold after the deck longitudinals are cut becomes a problem; moreover, it is necessary to ensure that the deck and the existing frame structure do not deform during the process of replacing all the deck longitudinals; at the same time, bulk carriers enter the site The time is July and August, which is the hottest season of the year. It is necessary to ensure the ventilation of the construction environment for workers

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