Ship loading method for jacket fixed platform pile foundation

Abstract

The invention discloses a ship loading method for a jacket fixed platform pile foundation, which belongs to the technical field of ocean engineering and comprises the following steps: S1, laying a bottom layer steel pile tool on a site, and hoisting two steel piles on the first layer to a steel pile tool cross beam; s2, the steel piles are sequentially hoisted according to the sequence of two steel piles on the first layer, three steel piles on the second layer and three steel piles on the third layer from bottom to top, and meanwhile the second layer and the third layer of the steel pile tool are welded; s3, the SPMT trolley is started to enter from the two sides of the steel pile tool and is in place at the preset jacking position; s4, the SPMT trolley jacks and lifts the packaged steel piles, and the steel piles are transported to a transportation barge which is barged by a wharf; and S5, after the steel pile reaches the preset position, the SPMT trolley retreats, the steel pile tool outside the ship is cut, welding shipment fixing work is conducted, and steel pile shipment is completed. The SPMT trolley can enter and exit from the two sides of the steel pile tool, the gravity center of a steel pile tool frame is lowered, the requirement for the stability of a ship is lowered, and the ship loading efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of marine engineering, and in particular relates to a method for loading a pile foundation of a jacket fixed platform onto a ship. Background Art

[0002] At present, with the continuous advancement of the offshore oil and gas exploration and development industry, the growth point and development focus of oil and gas production have gradually shifted from shallow waters to deep sea areas. As the water depth increases, the weight of the jacket, which serves as the foundation of the offshore platform, gradually increases. Correspondingly, the number, length and weight of steel piles required to fix the jacket foundation gradually increase, which brings huge challenges to the construction of loading and transportation of steel piles.

[0003] In order to facilitate the loading and unloading of steel piles, most of the existing technical solutions are to pack the steel piles on land and then transport them to the barge by a trolley or floating crane, which can effectively reduce the overall construction time. However, in order to allow the SPMT trolley to pass, the traditional steel pile packing method usually uses a pier to raise the steel pile tooling above the trolley plane during the initial welding, and the center of gravity is biased upward, which requires higher stability of the ship.

[0004] Therefore, it is urgent to design a method for loading the pile foundation of the jacket fixed platform on board to solve the problem mentioned above that the center of gravity of the steel pile tooling is biased upward and requires high stability requirements for the ship. Summary of the invention

[0005] In order to solve the technical problem mentioned in the background technology that the center of gravity of the steel pile tooling is biased upward and requires high stability requirements for the ship, a method for loading a jacket fixed platform pile foundation on a ship is provided to solve the above problem.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the method for loading the pile foundation of the jacket fixed platform of the present invention is as follows:

[0007] A method for loading a pipe frame fixed platform pile foundation onto a ship, comprising the following steps:

[0008] S1. Lay the bottom layer of steel pile tooling on the site, and hoist the two steel piles of the first layer onto the crossbeam of the steel pile tooling;

[0009] S2. The steel piles are hoisted in the order of two steel piles in the first layer, three steel piles in the second layer, and three steel piles in the third layer from bottom to top, and the second and third layers of the steel pile tooling are welded at the same time;

[0010] S3, start the SPMT trolley to enter from both sides of the steel pile tooling and position it at the preset jacking position;

[0011] S4. The SPMT trolley lifts the packed steel piles and transports them to the transport barge docked at the wharf;

[0012] S5. After the steel pile reaches the preset position, the SPMT trolley withdraws and the steel pile tooling outside the ship is cut and welded for loading and fixing. The loading of the steel pile is completed.

[0013] Furthermore, in S1, the bottom layer of steel pile tooling is laid from the ground, and the ground reinforcement treatment is performed at the location of the I-beam beam of the steel pile tooling.

[0014] Furthermore, in S2, the order of hoisting the steel piles is that the number of steel piles in the bottom layer is less than the number of steel piles in the upper layer, and the numbers in the remaining layers remain the same.

[0015] Furthermore, in S2, the length of the steel pile exceeds the steel pile fixture at the rear of the transport barge, and the transverse I-beams of the steel pile fixture between the second and third layers are replaced with sand bags to support the upper and lower layers of steel piles, and the vertical I-beams are spot welded to the steel piles.

[0016] Furthermore, in S2, after the steel pile tooling is welded, the overall structure is symmetrical.

[0017] Further, in S3, when the height of the SPMT trolley is lower than the height of the transverse I-beam of the second layer of the steel pile tooling, a cushion pier is placed at a preset jacking position on the SPMT trolley to increase the jacking height.

[0018] Furthermore, in S3, the length of the SPMT trolley is equal to the steel pile to ensure that the strength of the SPMT trolley and the structural strength of the steel pile tooling meet the requirements when the steel pile is loaded on the ship.

[0019] Furthermore, in S5, the steel pile tooling for cutting outside the ship is the steel pile tooling for cutting the portion beyond the stern of the transport barge, and the loading and fixing on the ship is completed by welding the reinforced support on the bottom steel pile tooling at the stern.

[0020] Furthermore, when the steel pile tooling is being fixed on the ship, it is welded vertically downward at the outer position of the second layer of the steel pile tooling, and then the inclined support is welded to fix it.

[0021] Furthermore, in S5, when the steel pile tooling is removed at the land dock after the steel piles are loaded on the ship, the outer frame of the steel pile tooling is first cut, then the vertical I-beams are removed, and finally the sand bags between the steel piles are pulled out.

[0022] The method for loading the pile foundation of the jacket fixed platform of the present invention has the following advantages:

[0023] The present invention bundles steel piles whose length far exceeds that of the barge into piles on the dock ground and then loads them onto the ship, thereby shortening the overall construction process. The present invention adopts the "2-3-3" steel pile packaging form and the outboard steel piles are padded with sandbags. The SPMT trolley can enter and exit from both sides of the steel pile tooling. The center of gravity of the steel pile tooling frame is lowered, the stability requirement for the ship is lowered, and the dependence on large floating crane ship resources and large barges is reduced. The subsequent removal of the outboard steel pile tooling is extremely convenient, which is conducive to personnel operation, improves safety, and improves loading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the method for loading a pipe frame fixed platform pile foundation of the present invention;

[0025] Figure 2 It is a schematic diagram of the bottom steel pile tooling of the present invention;

[0026] Figure 3 This is a schematic diagram of the first welding of the second layer of steel pile tooling of the present invention;

[0027] Figure 4 This is a schematic diagram of the second welding of the second layer of steel pile tooling of the present invention;

[0028] Figure 5 It is an overall schematic diagram of the steel pile tooling of the present invention;

[0029] Figure 6 It is a schematic diagram of the jacking of the steel pile tooling of the present invention;

[0030] Figure 7 A schematic diagram of sand bags between steel piles of the present invention;

[0031] Figure 8 This is a schematic diagram of fixing the steel pile tooling on a ship according to the present invention.

[0032] Explanation of the markings in the figure: 1. Steel pile; 2. Steel pile tooling; 3. SPMT trolley; 4. Cushion pier; 5. Sandbag; 6. Vertical fixation; 7. Oblique support fixation. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0035] Please refer to the attached Figure 1 To Attachment Figure 8 The present invention describes a method for installing a pipe frame fixed platform pile foundation on a ship.

[0036] Most of the existing technical solutions are to pack the steel piles 1 on land and then transport them to the barge by a trolley or floating crane, which can effectively reduce the overall construction time. However, the traditional way of packing the steel piles 1 is symmetrical packaging. In order to allow the SPMT trolley 3 to pass, the steel pile tooling 2 is usually raised to the plane of the trolley by a pier 4 during the initial welding. The center of gravity is biased upward, which makes the stability requirements of the ship higher.

[0037] Therefore, the present invention provides a method for loading a pile foundation of a jacket fixed platform, such as Figure 1 As shown, the following steps are included:

[0038] S1. Lay the bottom steel pile tooling 2 on the site, and hoist the two steel piles 1 of the first layer onto the crossbeam of the steel pile tooling 2; specifically, Figure 2 As shown, the bottom steel pile fixture 2 is laid from the ground, and the position of the I-beam crossbeam of the steel pile fixture 2 is reinforced on the ground. Specifically, starting from the bottom layer, the bottom transverse I-beam and vertical I-beam are placed on the site, and then the first layer of steel piles 1 are hoisted onto the transverse I-beam. The steel pile fixture 2 is laid directly from the ground, and the position of the transverse I-beam of the steel pile fixture 2 is subject to greater force, and ground reinforcement treatment is required.

[0039] S2, hoist the steel piles 1 in the order of two steel piles 1 in the first layer, three steel piles 1 in the second layer, and three steel piles 1 in the third layer from bottom to top, and weld the second and third layers of the steel pile tooling 2 at the same time. Figure 3 , Figure 4 and Figure 5 As shown; the order of hoisting the steel piles 1 is that the number of steel piles 1 in the bottom layer is less than the number of steel piles 1 in the upper layer, and the numbers in the remaining layers remain the same or are increased or decreased as needed.

[0040] like Figure 7 As shown, the length of the steel pile 1 exceeds the steel pile fixture 2 at the rear of the transport barge, the transverse I-beam of the steel pile fixture 2 between the second and third layers is replaced with a sandbag 5 to support the upper and lower layers of steel piles 1, and the vertical I-beam is spot welded to the steel pile 1. After the welding of the steel pile fixture 2 is completed, the overall structure is symmetrical, so that the SPMT trolley 3 can lift and control the center of gravity of the steel pile fixture 2.

[0041] S3, start the SPMT trolley 3 to enter from both sides of the steel pile tooling 2 and take position at the preset jacking position, such as Figure 6 As shown, when the height of the trolley is lower than the height of the horizontal I-beam of the second layer of the steel pile fixture 2, a cushion 4 is placed at a preset lifting position on the trolley to increase the lifting height. Specifically, for packaging of steel piles 1 with larger diameters or steel piles 1 with higher bottom steel pile fixtures 2, a cushion 4 can be placed at a preset lifting position on the trolley to increase the lifting height of the SPMT trolley 3. The length of the SPMT trolley 3 is equal to that of the steel pile 1 to ensure that the strength of the SPMT trolley 3 and the structural strength of the steel pile fixture 2 meet the requirements when the steel pile 1 is loaded on the ship.

[0042] S4, the trolley lifts up the packaged steel pile 1 and transports it to the transport barge docked at the wharf. Specifically, the hydraulic system of the SPMT trolley 3 is started, and the steel pile tooling 2 is lifted up. The SPMT trolley 3 transports it forward to the edge of the wharf and delivers it to the transport barge docked according to the preset loading steps and ballasting process.

[0043] S5. After the steel pile 1 reaches the preset position, the SPMT trolley 3 withdraws, and the steel pile tooling 2 outside the ship is cut and welded for fixing before loading on the ship. The loading of the steel pile 1 is completed. Specifically, after the steel pile 1 is transported to the preset position of the barge, the SPMT trolley 3 descends the lifting height, and then withdraws from the transport barge carrying the cushion 4. Thereafter, the steel pile tooling 2 outside the ship is cut and the steel pile tooling 2 on the ship is welded for fixing. The steel pile tooling 2 outside the ship is cut to cut the steel pile tooling 2 that exceeds the stern of the transport barge, and the loading and fixing is completed by welding the reinforced support of the bottom steel pile tooling 2 at the stern.

[0044] like Figure 8 As shown, when the steel pile fixture 2 is being fixed on the ship, the vertical fixing 6 is welded downward at the outer position of the second layer of the steel pile fixture 2, and then the oblique support fixing 7 is welded. When the steel pile 1 is removed from the land dock after being loaded on the ship, the outer frame of the steel pile fixture 2 is first cut, and then the vertical I-beam is removed, and finally the sandbags 5 between the steel piles 1 are pulled out.

[0045] The present invention shortens the overall construction process by bundling steel piles 1 whose length far exceeds that of the barge on the dock ground and then loading them on board. The "2-3-3" steel pile 1 packaging form and the outboard steel piles 1 are padded with sand bags 5. The SPMT trolley 3 can enter and exit from both sides of the steel pile tooling 2. The center of gravity of the steel pile tooling 2 frame is lowered, the stability requirement for the ship is lowered, and the dependence on large floating crane ship resources and large barges is reduced. The subsequent removal of the outboard steel pile tooling 2 is extremely convenient, which is conducive to personnel operation and improves safety.

[0046] Compared with the traditional method, the present invention adopts a "2-3-3" form or a similar form with fewer bottom layers and more high layers. Compared with the traditional packaging method of equal quantity, packaging can start from the ground of the site, and the SPMT trolley 3 is transported from both sides, which effectively reduces the center of gravity of the steel pile 1 during loading and transportation, reduces the stability requirements of the ship, and reduces the dependence on large ship resources.

[0047] In order to ensure that the strength of the SPMT trolley 3 and the structural strength of the steel pile fixture 2 meet the requirements when the steel pile is loaded on the ship, the length of the SPMT trolley 3 is equal to the steel pile 1. If the steel pile fixture 2 that exceeds the ship is removed on land, it is difficult to remove due to the narrow space, especially the I-beam in the middle part, which poses a great safety risk.

[0048] The present invention replaces the horizontal I-beam with a sandbag filling, and the vertical I-beam remains unchanged. When dismantling the steel pile tooling 2, it is only necessary to dismantle the outer frame of the steel pile tooling 2, and the internal sandbag can be directly pulled out using a crane or a winch, which is convenient for personnel operation and improves safety.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for loading a pile foundation of a jacket fixed platform, characterized in that: The following steps are involved: S1. Lay the bottom layer of steel pile tooling on the site, and hoist the two steel piles of the first layer onto the crossbeam of the steel pile tooling; S2. The steel piles are hoisted in the order of two steel piles in the first layer, three steel piles in the second layer, and three steel piles in the third layer from bottom to top, and the second and third layers of the steel pile tooling are welded at the same time; S3, start the SPMT trolley to enter from both sides of the steel pile tooling and position it at the preset jacking position; S4. The SPMT trolley lifts the packed steel piles and transports them to the transport barge docked at the wharf; S5. After the steel pile reaches the preset position, the SPMT trolley withdraws and the steel pile tooling outside the ship is cut and welded for loading and fixing. The loading of the steel pile is completed.

2. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S1, the bottom layer of steel pile tooling is laid from the ground, and the ground reinforcement treatment is performed at the location of the I-beam beam of the steel pile tooling.

3. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S2, the order of hoisting steel piles is that the number of steel piles in the bottom layer is less than that in the upper layer, and the number of steel piles in the remaining layers remains the same.

4. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S2, the length of the steel pile exceeds the steel pile fixture at the rear of the transport barge. The transverse I-beams of the steel pile fixture between the second and third layers are replaced with sand bags to support the upper and lower layers of steel piles, and the vertical I-beams are spot welded to the steel piles.

5. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S2, after the steel pile tooling is welded, the overall structure is symmetrical.

6. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S3, when the height of the SPMT trolley is lower than the height of the transverse I-beam of the second layer of the steel pile tooling, a pier is placed at the preset jacking position on the SPMT trolley to increase the jacking height.

7. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S3, the length of the SPMT trolley is equal to the steel pile to ensure that the strength of the SPMT trolley and the structural strength of the steel pile tooling meet the requirements when the steel pile is loaded on the ship.

8. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S5, the steel pile fixture outside the ship is cut to cut the steel pile fixture beyond the stern of the transport barge, and the loading and fixing is completed by welding the reinforced support of the bottom steel pile fixture at the stern.

9. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 8, characterized in that: When the steel pile tooling is being fixed on the ship, it is welded vertically downward at the outer position of the second layer of the steel pile tooling, and then the inclined support is welded to fix it.

10. The method for loading a pipe frame fixed platform pile foundation on a ship according to claim 1, characterized in that: In S5, when the steel pile tooling is removed at the land dock after the steel piles are loaded on the ship, the outer frame of the steel pile tooling is cut first, then the vertical I-beams are removed, and finally the sand bags between the steel piles are pulled out.

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