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Prefabrication Technology of Large Deepwater Jacket Steel Pile

A jacket and steel pile technology, applied in sheet pile walls, industrial buildings, infrastructure engineering, etc., can solve problems such as difficult to complete construction tasks, limit construction time, waste of manpower and material resources, etc., to improve equipment fault tolerance rate, reduce The effect of equipment usage time and improvement of work efficiency

Active Publication Date: 2016-05-11
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problems existing in the traditional large-scale deepwater jacket steel pile prefabrication process are: 1. Each steel pile is extended from the A-span operation line, which limits the construction time and makes it difficult to complete the construction task
2. If equipment failure occurs during construction, it will have a great impact on the construction
3. The prefabrication of the shear key of each steel pile requires scaffolding, which needs to be dismantled immediately after use. When the next steel pile is constructed, the scaffolding needs to be erected again, which wastes a lot of manpower and material resources
4. Scaffolding operations are high-altitude operations, and repeated installation and disassembly are prone to safety accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the pipe making workshop of Qingdao Company, the workshop is divided into five spans of ABCDE, arranged in order from east to west. The C span is blanked, cut and rolled, the BD span is longitudinally seamed and 12m long, and the AE span is 36m long. At the same time, the 120-meter steel pile operation line on the north side of the A span will be extended as a whole, and the steel pile will be moved to the wharf after the extension.

Embodiment 2

[0021] Panyu 10-2 jacket steel piles have a total of 8 pieces, each weighing 440 tons and 115 meters long. Eight 36-meter joints need to be welded at the bridge length A. Due to the tight construction schedule, the construction pressure is very high. Adopt the work of the present invention application after the problem that may run into is analyzed before construction. Specific implementation steps:

[0022] (1) Divide a single steel pile into 42 single-section pipes, and perform blanking, cutting, rolling, and longitudinal seam welding in the C span of the workshop;

[0023] (2) When the 12-meter length of span B and span D of the workshop is completed, the shear key is directly installed;

[0024] (3) The A span and E span of the workshop are extended by 36 meters to form three sections. Transport the three sections of steel piles to the 120-meter line by flatbed truck to complete the overall lengthening;

[0025] (4) Use the steel transfer machine to transport the steel...

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PUM

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Abstract

The invention provides a precasting technology for steel piles of a large deep water jacket. A pipe workshop is divided into an area A, an area B, an area C, an area D and an area E. The precasting technology for the steel piles of the large deep water jacket is characterized by comprising the following steps of (1) performing discharging cutting on different sets of steel piles in the area C of the workshop, dividing each set of steel piles into three sections after welding of longitudinal joints and precasting the steel piles in the pipe workshop; (2) assembling the steel piles welded with shear rings in advance in the area B and the area D of the workshop and directly mounting shear keys after welding of the steel piles with the lengths of 12 meters; (3) connecting the steel piles to obtain two long steel piles with the lengths of 36 meters in the area E of the workshop, connecting the steel piles to obtain a long steel pile with the length of 36 meters, and conveying the steel piles in the area E to a 120-meter steel pile operating line by using a platform lorry so that the steel piles can be connected to one another to obtain whole long steel piles; and (4) moving the whole long steel piles to a sea shipping wharf by using a moving machine after the whole long steel pipes are obtained, and shipping the whole long steel piles in a hoisting or roll-roll shipment mode. Later construction pressure is reduced, and operation is convenient and safe.

Description

technical field [0001] The invention relates to offshore oil engineering construction technology, in particular to a large-scale deep-water jacket steel pile prefabrication technology that reduces construction time and improves construction efficiency. Background technique [0002] With the development of offshore oil engineering, large-scale deep-water jacket projects are increasing, and the corresponding steel pile length, wall thickness and pipe diameter are getting larger and larger, and the difficulty is gradually increasing. The construction period is often tight during construction, and the construction period needs to be shortened. [0003] The current traditional prefabrication process of large-scale deepwater jacket steel piles is as follows: 1. Steel piles are cut according to complete sets of blanking materials. After welding the longitudinal seams, each set of steel piles is divided into three sections and prefabricated in the pipe workshop. 2. Complete the 12-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/28E04H5/02
CPCE02D5/28E04H5/02
Inventor 李林马仕跃李超李明王东风
Owner CHINA NAT OFFSHORE OIL CORP