Split vertical non-slideway construction design method for shallow water jacket

Abstract

The invention provides a shallow water jacket split vertical non-slideway construction design method. The method comprises the following steps: generating shallow water jacket split vertical non-slideway construction scheme data; designing a segmented final assembly cushion pier of the upper jacket and an integral shipment transportation cushion pier of the jacket, and outputting cushion pier design data; designing a foundation transformation scheme of the shallow water jacket split vertical non-slideway construction area, and generating foundation transformation scheme data; designing the construction scheme of the lower jacket, the scheme of constructing the upper jacket based on the lower jacket and the hoisting and closing scheme of the upper jacket and the lower jacket, and generating lower jacket construction scheme data, upper jacket construction scheme data and hoisting and closing scheme data. The jacket is divided into the upper jacket and the lower jacket, vertical construction is completed at the same time in a non-slideway area, then folding and final assembly are conducted, the construction period is short, the ship loading speed is high, a slideway is not needed, and occupied space is small; vertical installation can be directly carried out on the sea, and offshore righting operation is not needed.

Description

Technical Field

[0001] This invention belongs to the field of offshore oil development, particularly the field of pile-based jacket platform construction, and is applicable to the construction of split-type vertical non-slipway jackets in shallow water on land. Specifically, it relates to a design method for the construction of split-type vertical non-slipway jackets in shallow water. Background Technology

[0002] In current offshore oil and gas exploration equipment, jackets are the most widely used fixed pile foundation platforms in the Bohai Sea, East China Sea, and South China Sea. Traditional jackets are generally constructed using horizontal, stacked methods, often relying on slipways for construction, and finally loaded onto ships using a towing and sliding method. This traditional method requires a significant amount of assembly space or slipway resources. In addition, its assembly period is long, and it consumes a large amount of auxiliary construction materials. Furthermore, because it is loaded horizontally onto ships, additional launching and righting operations are required at sea, necessitating the construction of numerous one-time-use accessories such as watertight bulkheads, pontoons, and water injection grouting systems, further increasing project costs. Summary of the Invention

[0003] In view of the background art, the purpose of this invention is to propose a design method for a split, vertical, non-slide track construction process for jacket structures.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: A method for constructing a split-type vertical non-slipway shallow water jacket structure includes the following steps: S1. Obtain basic parameter data of the jacket structure, and design and generate shallow water jacket structure split vertical non-slipway construction scheme data based on the basic parameter data of the jacket structure. S2. Based on the basic parameter data of the jacket structure and the construction scheme data, design the segmented assembly pads of the upper jacket structure and the overall shipping and transportation pads of the jacket structure, and output the corresponding pad design data. S3. Extract the construction location data and ground area data of the jacket, and combine them with the construction scheme data to design the foundation modification scheme for the construction area of ​​the shallow water jacket split vertical non-slipway, and generate foundation modification scheme data. S4. Based on the construction scheme data, the pier design data, and the foundation modification scheme data, design the construction scheme of the lower jacket, the scheme of constructing the upper jacket based on the lower jacket, and the hoisting and closure scheme of the upper jacket and the lower jacket, and generate the lower jacket construction scheme data, the upper jacket construction scheme data, and the hoisting and closure scheme data.

[0005] Preferably, the acquisition of basic parameters of the jacket includes acquiring data on the jacket's shipboard weight, center of gravity position, contour parameters, segmented structure type, and component material specifications.

[0006] Preferably, the step S1, which involves designing and generating the shallow water jacket structure split-type vertical non-slipway construction scheme data based on the jacket structure's basic parameter data, includes: S11. Based on the basic parameter data of the jacket structure, combined with the existing equipment and tools resources at the construction site, calculate the vertical transportation scheme and segmented hoisting strength of the jacket structure. Through calculation, design the SPMT deployment method, transportation tooling form, transportation support reaction force, jacket structure assembly segmentation type, and the maximum assembly capacity of the existing crawler crane. S12. Based on the basic parameter data of the catheter stent, design the segment positions of the catheter stent: (b) The segmentation position of the duct frame is designed such that when the duct frame is divided into the upper duct frame and the lower duct frame, the height of the upper duct frame and the lower duct frame are the same, or the height of the upper duct frame is designed to be slightly higher than the height of the lower duct frame, and the mass of the upper duct frame is less than the mass of the lower duct frame; (b) The segmentation position is designed such that the segmentation position is located at a height of no more than 50m above the ground when the duct frame is standing; (c) The closure joint of the segmentation position of the upper duct frame and the lower duct frame is designed to be as close as possible to the horizontal layer; S13. Based on the basic parameter data of the jacket structure, design the construction and assembly site of the jacket structure, and generate the jacket structure construction data and assembly data: (a) The jacket construction data includes: the upper jacket and the lower jacket are arranged as close as possible, and they are aligned vertically or horizontally; the corresponding facades and main structural axes of the upper jacket and the lower jacket are designed in the same direction; (b) Based on the position of the closure joint described in S12, the crane operation information and assembly site requirements in the assembly scheme of the upper jacket and the lower jacket are determined, and the site layout scheme of the jacket is finally determined to obtain the assembly data.

[0007] Preferably, S2, based on the basic parameter data of the jacket structure and the construction scheme data, designs the segmented assembly pads of the upper jacket structure and the overall jacket structure for ship loading and transportation, and outputs the corresponding pad design data, including: The segmented assembly pad is designed to be arranged below the guide legs of the upper guide frame. The top surface of the segmented assembly pad is inclined, and the inclination is the same as the inclination of the cross section of the guide legs of the upper guide frame. The segmented assembly pad is provided with a limiting structure, which is used for positioning the upper guide frame. The overall transport pad for the jacket is designed and arranged below the guide legs of the lower jacket as the overall assembly pad for the overall transport of the jacket. The top surface of the transport pad is designed to match the bottom end face of the guide legs of the lower jacket, which not only meets the load requirements of the overall assembly, but also meets the stability and strength requirements of the overall transport of the jacket.

[0008] In fact, the transport platform has multiple functions: it meets both the final assembly requirements and the SPMT (Special Purpose Transport) transportation requirements. It not only matches the top surface with the bottom of the guide leg to meet the final assembly load requirements, but also meets the stability and strength requirements for transportation, specifically fulfilling the design requirements of S11.

[0009] Preferably, the foundation modification scheme data mentioned in S3 includes: selecting the location of the transport pad for foundation modification, setting the area of ​​the foundation modification area to be larger than the grounding area of ​​the transport pad, and ensuring that the foundation modification area covers the deployment range of the SPMT.

[0010] Preferably, in step S4, the design of the construction scheme for the lower jacket, the scheme for constructing the upper jacket based on the lower jacket, and the hoisting and closure scheme for the upper and lower jackets, based on the construction scheme data, the pier design data, and the foundation modification scheme data, generates lower jacket construction scheme data, upper jacket construction scheme data, and hoisting and closure scheme data. The lower jacket construction scheme data includes: The construction site for the lower jacket is set to be the same as the site for the overall assembly of the jacket, and the lower jacket is constructed in the following order according to the construction plan data: S41. Large accessories, including the ground leveling plate, are in place. S42, First facade panel assembly: The first facade panel is installed above one side of the ground horizontal panel, the first facade panel covering the entire side of one side from the bottom to the top of the lower guide frame; S43, Assembly of bottom side decorative pieces: Install two sets of bottom decorative pieces on opposite sides of the lower part of the first facade panel, so that the planes of the two sets of bottom decorative pieces are adjacent to the lower part of the first facade panel, forming bottom side decorative pieces, which together with the first facade panel quickly form a stable support structure. S44. Middle horizontal layer assembly: Install the middle horizontal layer above the two side panels of the bottom layer; S45. Assembly of top-level side decorative pieces: Two sets of top-level decorative pieces are installed on both sides above the middle horizontal layer, and each set of top-level decorative pieces is located directly above one set of bottom-level decorative pieces. At the same time, the top-level side decorative pieces are adjacent to the upper part of the first vertical large piece, forming top-level side decorative pieces. S46. Assembly of the second facade panel: The second facade panel is installed on the opposite side of the first facade panel. The second facade panel has the same structure as the first facade panel and is symmetrical. The lower guide frame assembly is now complete.

[0011] Preferably, the upper jacket construction scheme data described in S4 includes: setting the lower jacket as the basic structure, so that the lower jacket provides support points for the assembly of the upper jacket in sections, and using tensioned steel wire ropes to assist in the assembly of the large vertical sections of the upper jacket.

[0012] Preferably, the hoisting and assembly scheme data described in S4 includes: designing the upper guide frame as a one-time overall assembly: performing strength calculations on the upper guide frame before hoisting, designing the hoisting point position at the leg position of the upper guide frame, designing the plane where the hoisting point is located above the horizontal plane of the center of gravity of the upper guide frame, and using 2-4 crawler cranes to complete the assembly operation.

[0013] Further preferably, the method also includes S5, designing a vertical loading and transportation scheme for the jacket structure, and obtaining vertical loading and transportation scheme data.

[0014] More preferably, the vertical loading and transportation scheme data includes: after the jacket structure is constructed, the SPMT modular vehicle is designed to first be positioned under the transport pad, then the body of the SPMT modular vehicle is lifted so that the transport pad and the jacket structure are off the ground, and transported according to the pre-input specified route. After the jacket structure is transported to the designated position on the barge deck, the body of the SPMT modular vehicle is lowered so that the transport pad contacts the support structure on the barge, and the body of the SPMT modular vehicle continues to be lowered. The SPMT modular vehicle returns to land according to the loading route, completing the vertical loading of the jacket structure onto the ship.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention divides the jacket structure into upper and lower sections. Both sections are simultaneously constructed vertically in a non-slipway area, then assembled using a crawler crane, and finally transported to the ship using a SPMT (Self-Propelled Modular Transporter). This method offers advantages such as short assembly time, fast loading speed, reduced demand for auxiliary construction tools, no need for slipways or complete towing and loading equipment, and minimal on-site space requirements. Furthermore, due to the vertical construction, installation can be carried out directly at sea without the need for offshore righting operations, further reducing the need for water injection and venting systems, watertight bulkheads, buoys, and other accessories. This reduces structural complexity and simplifies the offshore installation process. Therefore, it can significantly reduce project timelines and costs, and increase project productivity.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a flowchart of a method for constructing a split-type vertical non-slipway shallow water jacket according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper and lower catheter frames according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the construction scheme of the upper guide frame according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the transport pad according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the construction process of the lower guide frame according to an embodiment of the present invention; Figure 6 for Figure 5 A schematic diagram showing the location of the first large section of the facade in the diagram; Figure 7 This is a schematic diagram of the upper duct frame assembly scheme according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a vertical ship loading and transportation scheme for jackets according to an embodiment of the present invention. Detailed Implementation

[0018] This embodiment provides a method for constructing a split-type vertical non-slipway jacket structure in shallow water, such as... Figure 1 As shown, it includes the following steps: S1. Obtain basic parameter data of the jacket structure, and design and generate shallow water jacket structure split vertical non-slipway construction scheme data based on the basic parameter data of the jacket structure. S2. Based on the basic parameter data of the jacket structure and the construction scheme data, design the segmented assembly pads of the upper jacket structure and the overall shipping and transportation pads of the jacket structure, and output the corresponding pad design data. S3. Extract the construction location data and ground area data of the jacket, and combine them with the construction scheme data to design the foundation modification scheme for the construction area of ​​the shallow water jacket split vertical non-slipway, and generate foundation modification scheme data. S4. Based on the construction scheme data, the pier design data, and the foundation modification scheme data, design the construction scheme of the lower jacket, the scheme of constructing the upper jacket based on the lower jacket, and the hoisting and closure scheme of the upper jacket and the lower jacket, and generate the lower jacket construction scheme data, the upper jacket construction scheme data, and the hoisting and closure scheme data.

[0019] Furthermore, the above method can be broken down into the following specific steps: Step 1: Obtain the basic parameters of the catheter stent; Step 2: Generate the construction scheme data for the shallow water jacket structure split vertical non-slipway based on the parameters; Step 3: Design the segmented assembly pads for the upper jacket and the overall jacket for ship loading and transportation, and output the corresponding pad design data. Step 4: Obtain foundation modification plan data; Step 5: Obtain the construction plan data for the lower jacket structure; Step 6: Obtain the scheme data for constructing the upper jacket based on the lower jacket; Step 7: Obtain the hoisting and closure scheme data for the upper and lower jacket structures; Step 8: Obtain data for the vertical loading and transportation plan of the jacket structure.

[0020] The basic parameters of the jacket structure mentioned in step 1 should include the jacket structure's loading weight, center of gravity position, outline size (including: the size of the large end and small end, height, and main slope), segmented structure type, and component material specifications, etc., to meet the basic requirements of subsequent jacket structure transportation plan preparation and segmented hoisting strength verification.

[0021] The design concept in Step 2 is as follows: To improve the construction efficiency of the jacket structure and reduce the workload of high-altitude operations, the jacket structure adopts a split vertical construction method, that is, the jacket structure is divided into upper and lower parts, and the two parts are constructed vertically almost simultaneously. After the segmented construction is completed, the upper and lower parts are then assembled together, thereby achieving the goal of saving construction time. The specific steps are as follows: S21. Pre-verification of SPMT vertical ship loading and transportation scheme for jacket foundations, and pre-verification of segmented strength hoisting: Based on the jacket parameters obtained in step 1, and combined with the existing equipment and tools resources at the construction site, the vertical transportation plan and the segmented hoisting strength of the jacket are pre-checked. The SPMT deployment method, transportation tooling type, transportation support reaction force, assembly segmentation type, and maximum assembly capacity (lifting weight, lifting height, dimensions, etc.) are determined in advance.

[0022] S22, such as Figure 2 As shown, the selection of the closing joint of the upper duct frame 100 and the lower duct frame 200 should follow the following principles: (a) The closure joint of the upper and lower jacket structures, i.e., the segmentation position, should in principle be evenly divided according to the height of the jacket structure. That is, the selection of the segmentation position should, as far as possible, ensure that the height of the upper jacket 100 and the lower jacket 200 is the same after the division. However, since the main body of the jacket structure is a double-inclined structure, with a wide bottom and a narrow top, it is not possible to divide the segments according to the same height in most cases. Therefore, the segmentation position should be designed such that the total height of the upper jacket 100 is slightly higher than the total height of the lower jacket 200, and the upper jacket 100 is lighter than the lower jacket 200, so as to reduce the final assembly difficulty of the upper jacket 100 and the lower jacket 200 and the demand for heavy-duty crane resources.

[0023] (b) The height of the upper jacket 100 and the lower jacket 200 shall not exceed 50m, so as to reduce the difficulty of construction.

[0024] (c) The segmentation positions of the upper duct frame 100 and the lower duct frame 200 should be as close as possible to the horizontal layer. For example... Figure 2 As shown, in this embodiment, the lower end of the upper jacket 100 is provided with a horizontal layer 105, while the upper end of the lower jacket 200 does not have a horizontal layer nearby; instead, a free end 209 composed of jacket legs and openable diagonal braces is provided. Designing the segment positions of the upper jacket 100 and lower jacket 200 as close as possible to the horizontal layer means designing the segment positions of the upper jacket 100 and lower jacket 200 as close as possible to the horizontal layer 105. This improves the structural rigidity on the side of the horizontal layer 105 and reduces the opening size of the free end 209 of the lower jacket 200, facilitating the installation of temporary reinforcement. In fact, a horizontal layer can be provided near the segment position of either the upper jacket 100 or the lower jacket 200, and correspondingly, a free end can be provided near the other segment position. Combined with... Figure 2 In this embodiment, there are four horizontal layers from bottom to top. The third horizontal layer is located near the segmentation. After the upper duct frame 100 and the lower duct frame 200 are separated, the third horizontal layer is assigned to the upper duct frame 100. Here, the segmentation position, i.e. the closure joint, is as close as possible to the horizontal layer to ensure the strength of the upper duct frame 100 and the lower duct frame 200 after segmentation.

[0025] S23. Selection of site for jacket construction and final assembly, specifically including the following steps: (a) Under the premise of meeting the assembly space requirements described in S21, the upper jacket 100 and the lower jacket 200 are arranged as close as possible, and the two are arranged vertically or horizontally aligned. The corresponding facades and main structural axes of the upper jacket 100 and the lower jacket 200 are respectively arranged in the same direction, so as to ensure that when the upper jacket 100 and the lower jacket 200 are assembled, the crane can directly lift the upper jacket 100 and move it for assembly without additional adjustment of the orientation of the upper jacket 100. (b) Based on the segmentation results of S22, verify the overall assembly scheme of the upper jacket 100 and the lower jacket 200, determine the crane operation information, such as crane tonnage, boom condition, working radius, and super-lift counterweight radius, and then determine the overall assembly site requirements. Combined with the verification results of the basic parameters of the jacket obtained in step 1, the site layout of the jacket is finally determined. S24. Compile and prepare the plan to guide on-site construction.

[0026] The construction plan for step 3 specifically includes: like Figure 3 As shown, the segmented assembly support 120 is used for the upper jacket 100 and is arranged below the four upper jacket legs 110 of the upper jacket 100. The top surface of the support 120 has a certain slope, and the slope is the same as the cross-sectional slope of the upper jacket legs 110 to ensure full contact during use. The support 120 has a jacket leg limiting structure, such as a slot, to facilitate the positioning of the upper jacket 100. The specifications of the support 120 match the dimensions of the upper jacket legs 110. The strength of the support 120 needs to be determined based on the support reaction force of the upper jacket 100 and mechanical calculations. The bottom of the support 120 is set as a first temporary support 121, which is used for temporary support during the construction of the upper jacket 100. like Figure 4As shown, the integral transport pad 220 for the jacket structure is used for the overall transport of the jacket structure. It can be pre-positioned under the four lower jacket legs 210 of the lower jacket structure 200, serving as the assembly pad for the lower jacket structure 200. The top surface of the transport pad 220 must match the bottom surface of the jacket legs. If the bottom end face of the lower jacket leg 210 is a horizontal section, the top surface of the transport pad 220 can be designed as a horizontal plane; if the bottom surface of the lower jacket leg 210 is a slope, the top surface of the transport pad 220 must be designed as a matching slope structure. The design of the transport pad 220 considers the transport scheme in step S2.1, ensuring the lifting and transport stability of the self-propelled modular transport vehicle 300, while also considering the basic parameters of the jacket structure in step 1 to prevent interference with accessories. The strength design of the transport pad 220 is determined based on the transport support reaction force of the self-propelled modular transport vehicle 300 and calculations using mechanical software. The bottom center of the transport pad 220 is provided with a second temporary support 221, which avoids the self-propelled modular transport vehicle 300.

[0027] The foundation modification plan in step 4 specifically includes: To prevent the risk of uneven settlement during the construction of the jacket structure, the foundation is modified at the location of the transport pad 220 before the final assembly of the lower jacket 200. This can be done by excavating pits and backfilling with reinforced concrete to form a stable foundation structure. The area of ​​the modified foundation area is larger than the ground contact area of ​​the transport pad 220, and also covers the deployment range of the self-propelled modular transport vehicle 300, improving stability during transportation.

[0028] In the lower jacket construction plan of step 5, the construction site of the lower jacket 200 is the same as the site for the overall jacket assembly. That is, after the lower jacket 200 is constructed, it is assembled with the upper jacket 100 in situ before being loaded onto the ship. Figure 5 As shown, the construction scheme for the lower jacket includes the following steps: Large accessories such as S51, ground leveling plate 201, and anti-sinking plate 202 are in place; S52, First facade panel assembly: The first facade panel 203 is installed above one side of the ground horizontal panel 201, covering the entire side of one side from the bottom to the top of the lower guide frame 200. The first facade panel 203 is in an inclined state at this time and cannot maintain its upright state independently. More specifically, the construction method of the first facade panel 203 includes: 1. Hanging one end of a steel wire rope on the first facade panel 203, preferably at the upper part of the first facade panel 203; 2. Using a crane to lift the first facade panel 203 and turn it over until the first facade panel 203 is in an upright state; 3. Connecting the other end of the steel wire rope to a winch, connecting a counterweight to the side of the winch opposite to the direction of tension between the steel wire rope and the winch, and then using the winch to tighten the first facade panel through the steel wire rope, adjusting the posture, angle, etc. of the first facade panel 203, and then fixing the first facade panel 203 in an upright state; 4. Unhooking the crane and separating it from the first facade panel 203; 5. Installing multiple small panels next to the first facade panel 203, so that the small panels and the first facade panel 203 form a stable frame structure. The function of the counterweight is to balance the force on the winch and prevent it from overturning or slipping due to the tension of the wire rope, thereby ensuring that the first facade panel 203 is stable and controllable during the pulling process.

[0029] S53, Assembly of bottom side decorative pieces: Two sets of bottom decorative pieces 204 are installed on opposite sides of the lower part of the first facade large piece 203, so that the planes of the two sets of bottom decorative pieces 204 are adjacent to the lower part of the first facade large piece 203, forming bottom side decorative pieces, which together with the first facade large piece 203 quickly form a stable support structure. S54, Intermediate Horizontal Layer Assembly: Install the intermediate horizontal layer 205 above the two side panels of the bottom layer; S55, Assembly of top-level decorative pieces on both sides: Install two sets of top-level decorative pieces 206 on both sides above the middle horizontal layer 205, and each set of top-level decorative pieces 206 is located directly above one set of bottom-level decorative pieces 204. At the same time, the planes on which the two sets of top-level decorative pieces 206 are located are adjacent to the upper part of the first vertical large piece 203, forming top-level decorative pieces on both sides. S56. Assembly of the second facade panel: Using the method described in S52, the second facade panel 207 is installed on the opposite side of the first facade panel 203. The second facade panel 207 has the same structure as the first facade panel 203 and is symmetrical. At this point, the assembly of the lower guide frame 200 is completed.

[0030] like Figure 6 As shown, the first large facade panel 203 is installed on the side of the ground horizontal panel 201 with a higher structural density or a greater number of accessories 208. This prevents the ground horizontal panel 201 from forming a heavy cantilever end after final assembly, which could lead to structural deformation and affect construction accuracy. Accessories 208 include, but are not limited to, the ground horizontal panel 201 and the anti-sinking plate 202.

[0031] Step 6 involves an assembly scheme for the upper jacket structure similar to that for the lower jacket structure. The upper jacket assembly can be completed a week later than the lower jacket assembly, starting after the lower jacket 200 has a stable frame structure. This allows the lower jacket 200 to serve as a foundation structure, providing support points during the segmented assembly of the upper jacket. Figure 7 As shown, for example, the installation of the first facade panel 103 of the upper jacket 100 is assisted by tensioning the auxiliary steel wire rope 400, reducing the difficulty of final assembly. Specifically, after the first facade panel 103 of the upper jacket 100 is assembled on the ground and before final assembly and hoisting, the auxiliary steel wire rope 400 is pre-attached to its top. When the facade panel 103 is in place, the auxiliary steel wire rope 400 is simultaneously attached to the main structure of the adjacent lower jacket 200. After the facade panel 103 is positioned and the angle is adjusted, the auxiliary steel wire rope 400 is tightened, and then the crawler crane can release it. After the upper jacket 100 is built to form a stable frame structure, the auxiliary steel wire rope 400 can be released, and then the upper jacket can be constructed according to the construction steps.

[0032] The specific steps of the upper and lower jacket frame hoisting and assembly scheme in step 7 include: before hoisting, performing strength calculations on the structure of the upper jacket frame 100, selecting appropriate hoisting points, and selecting the location of the hoisting points at the location of the upper jacket leg 110 with higher strength. The plane where the hoisting points are located should be above the horizontal plane of the center of gravity of the upper jacket frame 100 to improve hoisting stability. The final assembly is completed using 2-4 crawler cranes.

[0033] The vertical loading and transportation scheme for the jacket structure in step 8 includes: such as Figure 8 As shown, the jacket 10 is loaded onto the ship using a vertical self-propelled modular transport vehicle 300. After the jacket 10 is constructed, the modular vehicle of the self-propelled modular transport vehicle 300 is first positioned under the transport platform 220. Then, the vehicle body is lifted so that the transport platform 220 and the jacket 10 are off the ground. The jacket 10 is then transported along the prescribed route. After the jacket 10 is transported to the designated position on the barge deck, the self-propelled modular transport vehicle 300 lowers its body, and the transport platform 220 contacts the support structure on the barge. The vehicle body continues to lower, and the self-propelled modular transport vehicle 300 returns to land along the loading route, completing the vertical loading process of the jacket 10.

[0034] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A design method for the construction of a split-type vertical non-slipway shallow water jacket structure, characterized in that, Includes the following steps: S1. Obtain basic parameter data of the jacket structure, and design and generate shallow water jacket structure split vertical non-slipway construction scheme data based on the basic parameter data of the jacket structure. S2. Based on the basic parameter data of the jacket structure and the construction scheme data, design the segmented assembly pads of the upper jacket structure and the overall shipping and transportation pads of the jacket structure, and output the corresponding pad design data. S3. Extract the construction location data and ground area data of the jacket structure, and combine them with the construction scheme data to design the foundation modification scheme for the construction area of ​​the split vertical non-slipway jacket structure in shallow water, and generate foundation modification scheme data. S4. Based on the construction scheme data, the pier design data, and the foundation modification scheme data, design the construction scheme of the lower jacket, the scheme of constructing the upper jacket based on the lower jacket, and the hoisting and closure scheme of the upper jacket and the lower jacket, and generate the lower jacket construction scheme data, the upper jacket construction scheme data, and the hoisting and closure scheme data.

2. The shallow water jacket structure split vertical non-slipway construction design method according to claim 1, characterized in that: The acquisition of basic parameters of the jacket includes acquiring data on the jacket's ship loading weight, center of gravity position, contour parameters, segmented structure type, and component material specifications.

3. The shallow water jacket structure split vertical non-slipway construction design method according to claim 2, characterized in that: S1 describes the data for designing and generating the shallow water jacket structure split vertical non-slipway construction scheme based on the basic parameter data of the jacket structure, including: S11. Based on the basic parameter data of the jacket structure, combined with the existing equipment and tools resources at the construction site, calculate the vertical transportation scheme and segmented hoisting strength of the jacket structure. Through calculation, design the SPMT deployment method, transportation tooling form, transportation support reaction force, jacket structure assembly segmentation type, and the maximum assembly capacity of the existing crawler crane. S12. Based on the basic parameter data of the catheter stent, design the segment positions of the catheter stent: (a) The segmentation position of the duct frame is designed such that when the duct frame is divided into the upper duct frame and the lower duct frame, the height of the upper duct frame and the lower duct frame are the same, or the height of the upper duct frame is designed to be slightly higher than the height of the lower duct frame, and the mass of the upper duct frame is less than the mass of the lower duct frame; (b) The segmentation position is designed such that the segmentation position is located at a height of no more than 50m above the ground when the duct frame is standing; (c) The closure of the segmentation position of the upper duct frame and the lower duct frame is designed to be as close as possible to the horizontal layer; S13. Based on the basic parameter data of the jacket structure, design the construction and assembly site of the jacket structure, and generate the jacket structure construction data and assembly data: (a) The jacket construction data includes: the upper jacket and the lower jacket are arranged as close as possible, and they are aligned vertically or horizontally; the corresponding facades and main structural axes of the upper jacket and the lower jacket are designed in the same direction; (b) Based on the position of the closure joint described in S12, the crane operation information and assembly site requirements in the assembly scheme of the upper jacket and the lower jacket are determined, and the site layout scheme of the jacket is finally determined to obtain the assembly data.

4. The shallow water jacket structure split vertical non-slipway construction design method according to claim 3, characterized in that: S2 describes the design of segmented assembly supports and overall ship transport supports for the upper jacket based on the basic parameter data of the jacket structure and the construction scheme data, and outputs corresponding support design data, including: The segmented assembly pad is designed to be arranged below the guide legs of the upper guide frame. The top surface of the segmented assembly pad is inclined, and the inclination is the same as the inclination of the cross section of the guide legs of the upper guide frame. The segmented assembly pad is provided with a limiting structure, which is used for positioning the upper guide frame. The overall transport pad for the jacket is designed and arranged below the guide legs of the lower jacket as the overall assembly pad for transporting the jacket as a whole. The top surface of the transport pad is designed to match the bottom end face of the guide legs of the lower jacket.

5. The shallow water jacket structure split vertical non-slipway construction design method according to claim 3, characterized in that: The foundation modification scheme data described in S3 includes: selecting the location of the transport pad for foundation modification, setting the area of ​​the foundation modification area to be larger than the grounding area of ​​the transport pad, and ensuring that the foundation modification area covers the deployment range of the SPMT.

6. The shallow water jacket structure split vertical non-slipway construction design method according to claim 5, characterized in that: S4 describes designing the construction scheme of the lower jacket, the scheme for constructing the upper jacket based on the lower jacket, and the hoisting and closure scheme of the upper and lower jackets based on the construction scheme data, the pier design data, and the foundation modification scheme data. The lower jacket construction scheme data includes: The construction site for the lower jacket is set to be the same as the site for the overall assembly of the jacket, and the lower jacket is constructed in the following order according to the construction plan data: S41. Large accessories, including the ground leveling plate, are in place. S42, First facade panel assembly: The first facade panel is installed above one side of the ground horizontal panel, the first facade panel covering the entire side of one side from the bottom to the top of the lower guide frame; S43, Assembly of bottom side decorative pieces: Install two sets of bottom decorative pieces on opposite sides of the lower part of the first facade panel, so that the planes of the two sets of bottom decorative pieces are adjacent to the lower part of the first facade panel, forming bottom side decorative pieces, which together with the first facade panel quickly form a stable support structure. S44. Middle horizontal layer assembly: Install the middle horizontal layer above the two side panels of the bottom layer; S45. Assembly of top-level side decorative pieces: Two sets of top-level decorative pieces are installed on both sides above the middle horizontal layer, and each set of top-level decorative pieces is located directly above one set of bottom-level decorative pieces. At the same time, the top-level side decorative pieces are adjacent to the upper part of the first vertical large piece, forming top-level side decorative pieces. S46. Assembly of the second facade panel: The second facade panel is installed on the opposite side of the first facade panel. The second facade panel has the same structure as the first facade panel and is symmetrical. The lower guide frame assembly is now complete.

7. The shallow water jacket structure split vertical non-slipway construction design method according to claim 6, characterized in that: The upper jacket construction scheme data described in S4 includes: setting the lower jacket as the basic structure, so that the lower jacket provides support points for the assembly of the upper jacket in sections, and using tensioned steel wire ropes to assist in the assembly of the large vertical sections of the upper jacket.

8. The shallow water jacket structure split vertical non-slipway construction design method according to claim 7, characterized in that: The hoisting and assembly scheme data described in S4 includes: designing the upper guide frame as a one-time overall assembly: performing strength calculations on the upper guide frame before hoisting, designing the hoisting point positions at the legs of the upper guide frame, designing the plane where the hoisting point is located above the horizontal plane of the center of gravity of the upper guide frame, and using 2-4 crawler cranes to complete the assembly operation.

9. The shallow water jacket structure split vertical non-slipway construction design method according to any one of claims 1 to 8, characterized in that: Following S4, S5 is also included: designing a vertical loading and transportation scheme for the jacket structure and obtaining vertical loading and transportation scheme data.

10. The shallow water jacket structure split vertical non-slipway construction design method according to claim 9, characterized in that: The vertical loading and transportation scheme data includes: after the jacket structure is constructed, the SPMT modular vehicle is designed to first be positioned under the transport pad, then the body of the SPMT modular vehicle is lifted so that the transport pad and the jacket structure are off the ground, and transported according to the pre-input specified route. After the jacket structure is transported to the designated position on the barge deck, the body of the SPMT modular vehicle is lowered so that the transport pad contacts the support structure on the barge. The body of the SPMT modular vehicle is lowered further, and the SPMT modular vehicle returns to land according to the loading route, completing the vertical loading of the jacket structure onto the ship.

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