Accuracy control method for multi-deck construction of large offshore oil and gas modules

Abstract

The method of the invention discloses a method for controlling the construction accuracy of multi-layer decks of a large-scale offshore oil and gas module. The method obtains the sag amount K generated by each deck of the offshore oil and gas module under unit weight through modeling and simulation. i , the concave amount of each deck caused by unit foundation settlement J i . Estimate the weight G of each deck and its equipment on the basis of design drawings and previous foundation settlement data i and the foundation settlement l after the completion of each deck i . According to the above data calculation, the deck depression deformation H of each deck can be obtained i . During the construction process, the total depression H of each deck is applied to each deck respectively. i The same pre-deformation convex amount is used to offset the deck concave amount caused by the dead weight and foundation settlement of each deck. This method can improve the construction accuracy of marine oil and gas module deck.

Description

technical field [0001] The invention relates to a construction precision control method of an offshore oil and gas module, in particular to a construction precision control method of a multi-layer deck of a large marine oil and gas module. Background technique [0002] With the trend of large-scale offshore oil and gas modules, their overall weight is getting heavier and heavier, and the largest offshore oil and gas module has a total weight of 30,000 tons. The huge weight of the marine modules can cause huge pressure on the ground during the construction process, causing the foundation to settle. Due to the uneven distribution of oil and gas modules, the foundation settlement is also uneven. The foundation settlement is the largest in the central part of the oil and gas module construction site, and the smallest in the surrounding areas. The subsidence of the foundation will cause the piers of the oil and gas module to settle. Since the height of the pier in the middle pa...

AI Technical Summary

Problems solved by technology

In addition, the self-weight of each deck of the oil and gas module and various equipment on it will also cause the deck to sag

[0003] Uneven foundation settlement and the self-weight of the deck and the equipment on it will reduce the manufacturing accuracy of the oil and gas modules, affect the construction quality of the oil and gas modules, and bring safety hazards to offshore oil and gas production

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