CN111483570B - Novel process for prefabricating and shipping suction anchor piles - Google Patents
Novel process for prefabricating and shipping suction anchor piles Download PDFInfo
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- CN111483570B CN111483570B CN202010231225.3A CN202010231225A CN111483570B CN 111483570 B CN111483570 B CN 111483570B CN 202010231225 A CN202010231225 A CN 202010231225A CN 111483570 B CN111483570 B CN 111483570B
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- suction anchor
- prefabricating
- shipping
- suction
- welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/30—Moving or transporting modules or hull blocks to assembly sites, e.g. by rolling, lifting or floating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
Abstract
The invention discloses a new process for prefabricating and shipping a suction anchor pile, which comprises the following steps: blanking in sections and manufacturing a material distribution pipe section; after prefabricating a structural frame at the top of the suction anchor, assembling the frame with a corresponding material distribution pipe section and integrally spraying the frame; prefabricating a ship-loading cushion pier, and sequentially performing independent prefabrication and integral folding on a plurality of material distribution pipe sections; installing an anchor chain and pipe section accessories of the suction anchor, fixedly welding the loading pad pier and the suction anchor, and hoisting the loading pad pier and the suction anchor to a barge for fixing; completing the ship loading task of the suction anchor. The novel process for prefabricating and shipping the suction anchor piles adopts a vertical construction prefabricating process, reduces the assembly difficulty of the suction anchor piles, and ensures the technical requirements of ovality, assembly precision, staggered skin size and the like; the dock is utilized for integral construction, the field resources are fully utilized, and the resource utilization efficiency is improved; the gantry crane is used for shipping, so that the use of a crawler crane and a floating crane is reduced, the construction efficiency is improved, and the construction period is shortened.
Description
Technical Field
The invention relates to the technical field of offshore oil engineering, in particular to a new process for prefabricating and shipping a suction anchor pile.
Background
The concept of the offshore suction anchor is proposed in the sixties of the twentieth century, the offshore suction anchor is firstly put into engineering use in the North sea of Europe in the beginning of the eighties, and the first application of the offshore suction anchor in offshore oil fields in China is a Caochien Dian 1-6 two-point mooring system in 1994.
The pipe diameter of the suction anchor cylinder body is usually larger than 4.2m, and the suction anchor cylinder body is characterized in that the diameter-thickness ratio is large, the pipe wall is flexible, the ovality is difficult to control in an assembly mode, the number of auxiliary structures of anchor piles is large, the installation and construction sequence is important, and the overall precision control is strict.
The horizontal construction method is generally adopted at home and abroad, and the main defects are as follows:
1. the assembly between the pipe sections and the welding group have higher precision control difficulty and have higher requirements on the flatness of a field, the bearing capacity of a rotating tire and the like;
2. enough space is needed for turning and walking of the crawler crane, and the occupied area of the field is large;
3. the hoisting and turning-over need the matching of two large-scale crawler cranes, so that higher operation risk exists;
4. the frontmost bearing capacity of a common wharf for shipping and transporting is very small, the rotating radius of the crawler crane needs to be increased, and the crawler crane stands at a far position for hoisting, so that resource waste is caused.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. In view of the above, the invention needs to provide a new process for prefabricating and shipping a suction anchor pile, which reduces the assembly difficulty of the suction anchor pile and ensures technical requirements such as ovality, assembly precision, staggered skin size and the like by adopting a vertical construction prefabricating process; the dock is utilized for integral construction, the field resources are fully utilized, and the resource utilization efficiency is improved; the gantry crane is used for shipping, so that the use of the crawler crane and the floating crane is reduced, the construction efficiency is improved, and the construction period is shortened.
The invention provides a new process for prefabricating and shipping a suction anchor pile, which comprises the following steps:
s1, cutting the suction anchor pile to be prefabricated into sectional materials after complete blanking, rolling the sectional materials into divided material pipe sections according to a pipe rolling machine, and adding a shape-preserving tool to each divided material pipe section;
s2, hoisting the material distribution pipe section to a dock for longitudinal seam welding, and prefabricating a top structural frame of the suction anchor;
s3, welding the prefabricated top structure frame and the corresponding material distributing pipe section group and then carrying out integral spraying;
s4, prefabricating a shipping pad pier at the designated position of a dock, sequentially assembling a plurality of distribution pipe sections by using a first lifting piece, and individually prefabricating the segmented distribution pipe sections according to the overall length of the suction anchor and then integrally folding the segmented distribution pipe sections;
s5, using the first hoisting piece to install anchor chains and pipe section accessories of the folded suction anchor, fixedly welding a loading pad pier and the suction anchor, hanging and buckling the welded suction anchor according to a hoisting scheme, hoisting and hoisting the hung and buckled suction anchor to a barge through the second hoisting piece, and fixing;
and S6, all the suction anchors are carried out according to the steps, and the ship loading tasks of the suction anchors and the suction anchor piles are completed.
According to an embodiment of the invention, in step S1, the conformal tooling includes a first support bar and a second support bar in a cross-shaped structure.
According to an embodiment of the present invention, in step S2, the top structural frame includes an annular support frame and a plurality of reinforcing ribs arranged in a transverse direction and a longitudinal direction on the annular support frame.
According to an embodiment of the present invention, in step S2, when performing the pre-fabricated welding of the top structural frame of the suction anchor, symmetrical and multiple welding seams are simultaneously welded, and the deformation amount thereof is ensured and controlled by using a predetermined welding process, which is a manual arc welding or carbon dioxide arc welding process.
According to an embodiment of the present invention, in step S5, the pipe segment attachment includes a pipe structure such as an anode, a welding ring, an ROV test piece, and the like.
According to an embodiment of the invention, in step S5, before the boating pier is fixed to the suction anchor, the flatness of the surface of the boating pier is adjusted, and a vertical construction is adopted.
According to one embodiment of the invention, the shipping pad pier comprises a square frame, and transverse reinforcing ribs and longitudinal reinforcing ribs which are arranged in the square frame and are perpendicular to each other.
According to an embodiment of the invention, in step S4, the circumferential seam of the separated pipe section is welded by a submerged arc welding machine after being prefabricated separately and during the whole folding process.
According to one embodiment of the invention, the first hoisting member is a gantry crane of a gantry crane.
According to one embodiment of the invention, the second hoisting member is a gantry crane with a hoisting load of 800T or more.
The novel process for prefabricating and shipping the suction anchor pile is suitable for prefabricating and shipping operation of the conventional suction anchor pile, and the novel process utilizes a dock and a portal crane gantry crane to perform assembly welding on the suction anchor pile, so that the assembly precision is improved; the barge for hauling the suction anchor pile is parked outside a dock gate, after the suction anchor pile is built, the suction anchor pile is hoisted to the barge from the dock by using a gantry crane, and finally the ship loading operation of the suction anchor pile is completed, wherein the vertical building prefabrication process is adopted, the assembly difficulty of the suction anchor pile is reduced, and the technical requirements of ovality, assembly precision, staggered skin size and the like are met; the dock is utilized for integral construction, the field resources are fully utilized, and the resource utilization efficiency is improved; the gantry crane is used for shipping, so that the use of a crawler crane and a floating crane is reduced, the construction efficiency is improved, and the construction period is shortened.
Drawings
Fig. 1 is a field layout diagram of a new process for prefabricating and shipping a suction anchor pile according to the invention.
Fig. 2 to 5 are exploded views illustrating steps of a new process for prefabricating and shipping a suction anchor pile according to the present invention.
FIG. 6 is a schematic diagram of a conformal tooling according to the present invention.
Fig. 7 is a top view of a roof structural frame according to the present invention.
Fig. 8 is a schematic perspective view of a shipping pad pier according to the present invention.
Fig. 9 is a flow chart showing the steps of a new process for prefabricating and shipping a suction anchor pile according to the invention.
Reference numerals: 1-a material separating pipe section; 2, shape-preserving tooling; 3-a top structural frame; 4-loading a ship cushion pier; 5-a first lifting element; 6-a second lifting element; 7-a cable; 8-barge; 9-a dock gate; 10-a dock; 21-a first support bar; 22-a second support bar; 31-a ring support; 32-reinforcing rib plates; 41-square frame; 42-transverse reinforcing ribs; 43-longitudinal reinforcing ribs.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 9, a new process for prefabricating and shipping a suction anchor pile comprises the following steps:
s100, cutting the suction anchor pile to be prefabricated into sectional materials after complete blanking, rolling the sectional materials into distribution pipe sections 1 according to a pipe rolling machine, and adding a shape-preserving tool 2 to each distribution pipe section 1;
s200, hoisting the material distributing pipe section 1 to a dock 10 for longitudinal seam welding, and prefabricating a top structural frame 3 of the suction anchor;
s300, welding the prefabricated top structure frame 3 and the corresponding material distributing pipe section 1 in an assembling mode, and then carrying out integral spraying;
s400, prefabricating a shipping pad pier 4 at the appointed position of a dock 10, sequentially assembling a plurality of material distribution pipe sections 1 by using a first lifting piece 5, and individually prefabricating the segmented material distribution pipe sections 1 according to the overall length of a suction anchor and then integrally folding the prefabricated material distribution pipe sections;
s500, mounting an anchor chain and pipe section accessories of the folded suction anchor by using a first lifting piece 5, fixedly welding the ship-loading pad pier 4 and the suction anchor, hanging and buckling the welded suction anchor by using a cable 7 according to a lifting scheme, lifting and hoisting the hung and buckled suction anchor to a barge 8 by using a second lifting piece 6, and fixing;
s600, all the suction anchors are carried out according to the steps, and the ship loading tasks of the suction anchors and the suction anchor piles are completed.
The new process for prefabricating and shipping the suction anchor pile is suitable for prefabricating and shipping operation of the existing suction anchor pile, and the new process utilizes the dock 10 and the portal crane gantry crane to perform assembly welding on the suction anchor pile, so that the assembly precision is improved; the barge 8 for hauling the suction anchor pile is parked outside the dock gate 9, after the suction anchor pile is built, the suction anchor pile is hoisted to the barge 8 from the dock 10 by using a gantry crane, and finally the ship loading operation of the suction anchor pile is completed, wherein the vertical type building prefabrication process is adopted, the assembly difficulty of the suction anchor pile is reduced, and the technical requirements of ovality, assembly precision, staggered skin size and the like are met; the dock is utilized for integral construction, the field resources are fully utilized, and the resource utilization efficiency is improved; the gantry crane is used for shipping, so that the use of a crawler crane and a floating crane is reduced, the construction efficiency is improved, and the construction period is shortened.
As shown in fig. 6, in step S100, the shape-preserving tool 2 includes a first support rod 21 and a second support rod 22 in a cross structure to ensure that the ovality of the whole rolled material separating pipe section 1 meets the technical requirements, thereby improving the assembly precision.
As shown in fig. 7, in step S200, the top structural frame 3 includes an annular support frame 31 and a plurality of reinforcing rib plates 32 arranged on the annular support frame 31 in the transverse direction and the longitudinal direction, so as to improve the overall structure and the hoisting strength of the top structural frame 3, and further ensure the assembly accuracy and the stability during the hoisting process of the material distributing pipe section 1 of the suction anchor.
As shown in fig. 7, in step S200, when performing the prefabrication welding on the top structural frame 3 of the suction anchor, symmetrical and multiple welding seams should be welded simultaneously, and the deformation amount is ensured and controlled by using a predetermined welding process, which is a manual arc welding or carbon dioxide arc welding process, wherein when using the carbon dioxide arc welding, the welding process parameters are as follows: welding current 65A to 280A, welding voltage: 18V-32V, gas flow rate: 15L/Min-25L/Min, welding speed: 120 mm/Min-400 mm/Min to effectively control the welding deformation to meet the technical requirements.
As shown in fig. 1, in step S500, the pipe section accessory includes a pipe structure such as an anode, a welding ring, an ROV test kit, and the like.
As shown in fig. 8, in step S500, before the shipping pad 4 is fixed to the suction anchor, the flatness of the surface of the shipping pad 4 is adjusted, and the erection is adopted.
As shown in fig. 8, the ship-loading buttress 4 comprises a square frame 41, and a transverse reinforcing rib 42 and a longitudinal reinforcing rib 43 which are arranged in the square frame 41 and are perpendicular to each other, and has high structural strength so as to meet and improve the requirement of the ship-loading buttress 4 on the supporting strength of the suction anchor.
As shown in fig. 1 to 5, in step S4, when the separated pipe section 1 is prefabricated separately and is folded integrally, the circumferential seam is welded by a submerged arc welding machine, and the deformation of the welding is controlled so that the welded suction anchor meets the technical requirements.
As shown in fig. 1 to 5, the first hoisting member 5 is a gantry crane of a gantry crane to improve the assembly precision of the suction anchor and the suction anchor pile, fully utilize field resources, and improve the resource utilization efficiency, and the second hoisting member 6 is a gantry crane with a hoisting load of 800T or more, and is used for shipping, so that the use of a crawler crane and a floating crane is reduced, the construction efficiency is improved, and the construction period is shortened.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A new process for prefabricating and shipping a suction anchor pile is characterized by comprising the following steps:
s1, cutting the suction anchor pile to be prefabricated into sectional materials after complete blanking, rolling the sectional materials into divided material pipe sections according to a pipe rolling machine, and adding a shape-preserving tool to each divided material pipe section;
s2, hoisting the material distribution pipe section to a dock for longitudinal seam welding, and prefabricating a top structural frame of the suction anchor; the top structural frame comprises an annular supporting frame and a plurality of reinforcing rib plates which are arranged on the annular supporting frame in the transverse direction and the longitudinal direction;
s3, welding the prefabricated top structure frame and the corresponding material distributing pipe section group and then carrying out integral spraying;
s4, prefabricating a shipping pad pier at the designated position of the dock, sequentially assembling a plurality of distribution pipe sections by using a first lifting piece, and individually prefabricating the plurality of segmented distribution pipe sections according to the overall length of the suction anchor and then integrally folding the plurality of segmented distribution pipe sections;
s5, using the first lifting piece to install anchor chains and pipe section accessories of the folded suction anchor, fixedly welding the ship-loading pad pier and the suction anchor, hanging and buckling the welded suction anchor according to a lifting scheme, lifting and lifting the hung and buckled suction anchor to a barge through a second lifting piece, and fixing;
and S6, all the suction anchors are carried out according to the steps, and the ship loading tasks of the suction anchors and the suction anchor piles are completed.
2. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein in step S1, the conformal tooling comprises a first support rod and a second support rod in a cross-shaped structure.
3. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein in step S2, the top structural frame of the suction anchor is prefabricated and welded symmetrically and simultaneously with multiple welding seams, and the deformation is ensured and controlled by a predetermined welding process, which is a manual arc welding or carbon dioxide arc welding process.
4. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein in step S5, the pipe section accessories include anodes, welding rings, and ROV trial pipe structures.
5. The new process for prefabricating and shipping a suction anchor pile as claimed in claim 1, wherein in step S5, before the shipping pad pier is fixed with the suction anchor, the flatness of the surface of the shipping pad pier is adjusted and vertical construction is adopted.
6. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein the shipping pad pier comprises a square frame and transverse reinforcing ribs and longitudinal reinforcing ribs which are arranged in the square frame and are perpendicular to each other.
7. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein in step S4, the circular seam of the divided pipe section is welded by a submerged arc welding machine after being prefabricated separately and during the whole assembly process.
8. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein the first hoisting member is a gantry crane of a gantry crane.
9. The new process for prefabricating and shipping a suction anchor pile according to claim 1, wherein the second hoisting member is a gantry crane with a hoisting load of 800T or more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010231225.3A CN111483570B (en) | 2020-03-27 | 2020-03-27 | Novel process for prefabricating and shipping suction anchor piles |
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| CN202010231225.3A CN111483570B (en) | 2020-03-27 | 2020-03-27 | Novel process for prefabricating and shipping suction anchor piles |
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| CN111483570B true CN111483570B (en) | 2022-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101879932B (en) * | 2009-05-08 | 2013-03-06 | 中国海洋石油总公司 | Method for lengthening and lading steel piles of large deepwater jacket |
| CN101797956B (en) * | 2010-04-14 | 2013-06-26 | 南通航运职业技术学院 | Field digitized laser lofting method of ship piping system |
| US9334849B2 (en) * | 2014-03-17 | 2016-05-10 | Aquantis, Inc. | Floating tower frame for ocean current turbine system |
| CN110185408A (en) * | 2019-05-24 | 2019-08-30 | 广州海洋地质调查局 | A kind of suction anchor and its installation method applied in deep water shallow drilling engineering |
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