A technology for side construction and side lying construction and transportation of large jackets

Abstract

The invention discloses a construction and transportation technology for side-building and side-lying of a large jacket. The technology comprises the steps that A, a transition section is manufactured; B, basis of the jacket is manufactured; C, side lying and folding are conducted; D, the jacket and the transition section are folded, and tyre frames are fixed; E, a ship body is located; F, suspension centers are selected; H, the jacket is pre-craned; I, the jacket is craned; and J, a transport ship is fixed by the jacket. The construction and transportation technology for side-building and side-lying of the large jacket has the advantages that construction is safe and orderly; integral center of gravity of the jacket is lowered; contacting area of the jacket and the transport ship is increased; side-direction moment of force when the ship waggles transversely is shortened; arrangement and binding are more convenient; and stationarity of integral transportation is achieved.

Description

technical field [0001] The invention belongs to the field of marine transportation and manufacturing, and in particular relates to a side-building and side-lying construction and transportation process for large-scale jackets. Background technique [0002] Due to the large volume of the jacket foundation, the general construction factories are located in rivers or seasides to facilitate transportation. The jacket is divided into a transition section and a jacket foundation. The vertical main cylinder is arranged in the middle of the transition section, and four sides are arranged. There is a steel platform in the middle of the leg, and the jacket foundation is the main structure. There is a ship berthing part between two of the legs. On the shore, the upper barge is hoisted using reliefs. [0003] In the patent No. CN105019419A jacket, jacket foundation platform and jacket construction method, the jacket construction method is: connect the main pipe and the guidance pipe th...

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Problems solved by technology

[0003] In the patent No. CN105019419A jacket, jacket foundation platform and jacket construction method, the jacket construction method is: connect the main pipe and the guidance pipe through the middle strut, and then install each diagonal strut between the main pipe and the auxiliary pipe , to form a sheet body, the adjacent sheets are connected by intermediate struts, and then the diagonal braces between adjacent sheets are installed. The jacket structure is small, and the jacket is installed vertically during construction. If for For large-scale jackets, there are certain difficulties in the construction, and it is difficult to achieve good installation accuracy, and because the height of the jacket is too high, it is necessary to use a sling platform to realize the installation and construction, and there is a certain degree of safety for the constructors. At the same time, the patent only discloses the construction process of the jacket foundation, and does not disclose all the construction processes of the complete jacket. The construction of the connection between the jacket foundation and the transition section is the most important in the jacket construction process. Difficult and most precision-determining step

[0004] Patent No. CN107089584A is a process for hoisting and binding jackets. This patent discloses a process for vertically hoisting jackets. The height of a large jacket is more than 50 meters, the width is more than 20 meters, and the length is more than 20 meters. The maximum lifting height of the gantry crane can only It satisfies 47 meters and a span of 60 meters. Therefore, for large jackets, it cannot be hoisted by this process. The vertical hoisting and transportation of this patent require structural strengthening and binding of the four main leg pipes. The center of gravity is high, and the contact area between the jacket and the deck surface of the transport ship is relatively small, which increases the lateral moment when the transport ship rolls, and the overall stability cannot be guaranteed during transportation

[0005] After searching, no technological steps related to the overall construction and transportation of the jacket were found. Especially for large jackets, the overall construction and transportation are more difficult, which is a difficult problem in the field of jackets. If a large jacket can be provided Side-building and side-lying manufacturing and transportation technology, safe and orderly construction, lowers the overall center of gravity of the jacket, increases the contact area between the jacket and the transport ship, reduces the lateral moment when the ship rolls, and makes it easier to arrange lashing and realize overall transportation Stability is bound to be welcomed by the industry

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