A method for constructing a non-slideway area of ​​a shallow water jacket and for loading SPMT on a ship

Abstract

The present invention discloses a method for constructing a shallow water jacket in a non-slideway area and rolling-on / roll-off loading of a shallow water jacket using SPMT, including: obtaining parameters of a shallow water jacket and a transport barge, selecting a shallow water jacket non-slideway construction area, and determining a construction sequence and a pre-deployment plan for the shallow water jacket, designing lifting beams, loading pads, and assembly pads for rolling-on / roll-off loading of the shallow water jacket; performing foundation treatment on the shallow water jacket non-slideway construction area; designing local supports; and determining a transportation path from the shallow water jacket non-slideway construction area to the transport barge. The method provided by the present invention completes the construction of the shallow water jacket in a non-slideway area, and subsequently uses SPMT to complete the rolling-on / roll-off loading and shipping of the shallow water jacket. It is suitable for horizontal non-slideway construction of shallow water jackets of 5000T and below, 4 legs, no launching truss structure, and using a hoisting and launching installation method, which has the technical effect of saving slideway resources and improving the production capacity of shallow water jackets at the construction site.

Description

Technical Field

[0001] The present invention relates to the technical field of non-slideway construction and transportation of shallow water jackets, and in particular to a method for constructing a non-slideway area of ​​a shallow water jacket and a SPMT roll-on / roll-off ship loading method. Background Art

[0002] In the current offshore oil and gas production equipment, traditional shallow-water jackets within a water depth of less than 70 meters are usually built vertically and loaded on board using SPMT, while shallow-water jackets beyond 70 meters are not suitable for vertical construction and are usually built horizontally using a slideway and then loaded on board using a sliding drag. With the exploitation of domestic offshore marginal oil fields, a large number of shallow-water jackets with a water depth of about 100 meters and a weight of less than 5,000 tons need to be built. If traditional horizontal slideway construction is used, it will occupy the precious slideway resources of the construction site. If multiple jackets with a water depth of hundreds of meters are built at the same time, the slideway resources of the construction site will be exhausted. In addition, since this type of shallow-water jacket is relatively light in weight and the unit output tonnage of the slideway is very low, the economic efficiency of using a slideway to build this type of shallow-water jacket is poor.

[0003] Therefore, the non-slideway construction and SPMT loading of shallow water jackets are becoming more and more important. This method not only has the advantages of not occupying slideway resources, not requiring sliding and hauling equipment, less prefabrication of assembly pads, and reusable lifting beams, but also has the characteristics of convenient SPMT assembly, flexible transportation routes, low sequence requirements for construction stations, and short loading cycle. It is conducive to utilizing the non-slideway area of ​​the site, expanding the construction capacity at the same time, reducing project costs, and greatly improving construction competitiveness. However, there is currently a lack of mature technical solutions for the horizontal non-slideway area construction and SPMT loading of shallow water jackets.

[0004] The method provided by the present invention completes the construction of a shallow water jacket in a non-slide area, and subsequently uses SPMT to complete the roll-on / roll-off shipment of the shallow water jacket. It is suitable for the horizontal non-slide construction of a shallow water jacket of 5000T or less, 4 legs, no launching truss structure, and using a hoisting launching installation method. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a method for constructing a non-slide area of ​​a shallow water jacket and for rolling on and off the SPMT, which is used to solve the technical problem of excessively high occupancy rate of slide resources at the construction site when constructing and loading the shallow water jacket, thereby achieving the purpose of significantly reducing the occupancy rate of slide resources at the construction site and improving the flexibility of horizontal non-slide construction of the shallow water jacket.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A method for constructing a non-slideway area of ​​a shallow water jacket and a SPMT roll-on / roll-off ship loading method, comprising the following steps:

[0008] Acquiring parameters of the shallow water jacket and the transport barge, and selecting a non-slideway construction area of ​​the shallow water jacket according to the acquired parameters and determining a construction sequence of the shallow water jacket;

[0009] Determine the pre-deployment plan for the SPMT roll-on / roll-off loading according to the acquired parameters, and design the lifting beam, loading pier and assembly pier for the shallow water jacket roll-on / roll-off loading according to the pre-deployment plan;

[0010] Acquiring the ground pressure of the non-slideway construction area of ​​the shallow water jacket during construction, and performing foundation treatment on the non-slideway construction area of ​​the shallow water jacket according to the ground pressure;

[0011] Analyze the overall transportation stability of the SPMT modular vehicle and design the local support based on the stability analysis results;

[0012] The transportation path from the non-slideway construction area of ​​the shallow water jacket to the transport barge is determined according to the site layout of the non-slideway construction area of ​​the shallow water jacket and the distribution of interference objects along the transportation path.

[0013] As a preferred embodiment of the present invention, when obtaining the parameters of the shallow water jacket and the transport barge, it includes:

[0014] According to the design data of the shallow water jacket and the information of the transport barge, parameters of the shallow water jacket and the transport barge are obtained;

[0015] The parameters of the shallow water jacket include: the size, weight, center of gravity, specifications of components, wall thickness, material and main structure of the shallow water jacket; the parameters of the transport barge include: the length, width, bearing capacity and interference distribution of the transport barge deck.

[0016] As a preferred embodiment of the present invention, when selecting a non-slideway construction area of ​​a shallow water jacket and determining a construction sequence of the shallow water jacket, the method includes:

[0017] The non-slideway construction area of ​​the shallow water jacket is selected according to the size of the shallow water jacket and the area and planning of the non-slideway construction area of ​​the shallow water jacket, and the construction sequence of the shallow water jacket is determined according to the structural characteristics of the shallow water jacket.

[0018] As a preferred embodiment of the present invention, when determining the pre-deployment plan for SPMT roll-on / roll-off shipment, it includes:

[0019] According to the main structural form of the shallow water jacket, determine the pre-deployment plan for SPMT roll-on / roll-off loading;

[0020] Preliminarily determine the layout and position of the lifting beam according to the pre-layout plan;

[0021] The pre-deployment vehicle solution must meet the length and width requirements of the transport barge deck;

[0022] When designing the lifting beam for the shallow water jacket roll-on / roll-off installation, the following aspects are included:

[0023] Extract the force model of the lifting beam, and design the lifting beam according to the force model using design simulation software and offshore structure analysis software to determine the specification, size, material, quantity, layout position, layout method and support position of the lifting beam;

[0024] Wherein, the arrangement position of the lifting beam needs to be aligned with the main structural node position of the shallow water jacket;

[0025] When designing the loading pier for the shallow water jacket roll-on / roll-off, the following aspects shall be included:

[0026] Based on the parameters of the shallow water jacket and the information of the lifting beam, modeling is performed using offshore structure analysis software to determine the force magnitude of the loading pier;

[0027] According to the magnitude of the force, the loading pier is designed by using a design simulation software to determine the structural form of the loading pier;

[0028] The arrangement and bottom surface of the loading pier must meet the requirements of the size and bearing capacity of the transport barge deck;

[0029] When designing the assembly pad for the shallow water jacket roll-on / roll-off, the following are included:

[0030] Determine the layout position of the assembly pier, establish a mechanical model through offshore structure analysis software, and determine the force magnitude of the assembly pier;

[0031] The structural form of the assembly cushion is determined by design simulation software.

[0032] As a preferred embodiment of the present invention, when obtaining the ground pressure of the shallow water jacket during the construction of the non-slideway construction area, it includes:

[0033] According to the foundation bearing capacity testing specifications and standards, the foundation of the supporting area is tested to obtain the foundation bearing capacity characteristic value and the maximum allowable value of the foundation bearing capacity;

[0034] According to the specifications and material information of the shallow water jacket, a mechanical model is established by using offshore structure analysis software, and according to the support position of the shallow water jacket, the pressure of each pier structure on the ground is obtained;

[0035] Compare the pressure on the ground with the maximum allowable value of the foundation bearing capacity, and if it is greater than the maximum allowable value of the foundation bearing capacity, redesign the assembly cushion and obtain the support reaction force until the pressure on the ground is less than or equal to the maximum allowable value of the foundation bearing capacity;

[0036] When the foundation treatment is performed on the non-slideway construction area of ​​the shallow water jacket, it includes:

[0037] Treating the foundation below the pad arrangement area in the non-slideway construction area of ​​the shallow water jacket;

[0038] The treatment method is: bury a reinforced concrete platform with a thickness that meets the requirements, and use cement mortar to level the top of the reinforced concrete platform so that the edge is flush with the surrounding ground.

[0039] As a preferred embodiment of the present invention, the above method further includes:

[0040] If uneven settlement occurs in the non-slideway construction area of ​​the shallow-water jacket during construction, settlement treatment is carried out by lifting with SPMT and brackets in combination with jacks;

[0041] Among them, when the settlement treatment is carried out by SPMT jacking, it includes:

[0042] The settlement point is lifted by SPMT and the lifting tooling above. After lifting to the specified height, the pad is placed in the lifting gap between the pad and the ground to complete the settlement compensation.

[0043] The SPMT and the lifting tooling above include: SPMT load-sharing beams, SPMT support piers, pads, and pads;

[0044] When the settlement treatment is carried out by using the bracket and the jack, it includes:

[0045] Weld the corbel structure to the designated positions on both sides of the pillar where the settlement pad is located, and fix the jack above the corbel. After the jack is lifted to the designated height, place the pad into the lifting gap to complete the settlement compensation.

[0046] As a preferred embodiment of the present invention, when analyzing the overall transportation stability of the SPMT module vehicle, it includes:

[0047] According to the pre-layout plan and the design of the lifting beam, loading pad and assembly pad, the layout plan and the distribution position of the transport support points are finally determined; the spacing of the transport support points must meet the transportation and use requirements of the SPMT modular vehicle manufacturer. If not, a load-sharing beam is installed on the SPMT modular vehicle;

[0048] According to the shipping gross weight, the center of gravity position, the distribution position of the transport support points finally determined and the layout position of the SPMT module vehicle of the shallow water jacket, a number of transport parameters are obtained, wherein the number of transport parameters include: the total load weight of the vehicle body, the rated load utilization rate of the vehicle body, the axle load, the axle pressure, the stability angle, the ground pressure and the transport support force;

[0049] Establishing a shallow water jacket transport mechanics model according to the specifications and materials of the components of the shallow water jacket and the distribution positions of the transport support points finally determined, and verifying the overall structural strength of the shallow water jacket under transport conditions according to the transport support forces;

[0050] If the transportation parameters and overall structural strength of the shallow water jacket cannot meet the requirements, the layout of the SPMT module vehicle is readjusted until the requirements are met;

[0051] When designing local supports, include:

[0052] According to the transport support force, a transport support tooling is designed by using a general finite element modeling of a design simulation software, and the structural strength of the transport support tooling is checked;

[0053] If the structural strength of the transport support tooling cannot meet the requirements, the transport support tooling is redesigned until the strength requirements are met.

[0054] As a preferred embodiment of the present invention, when determining the transportation path, it also includes:

[0055] The distribution of the mooring posts and fairleads above the transport barge deck and the layout of the loading piers are obtained to determine the final position of the shallow water jacket on the transport barge; if interference occurs, the interference is removed.

[0056] As a preferred embodiment of the present invention, the SPMT roll-on / roll-off pre-deployment vehicle solution includes:

[0057] If the main leg of the shallow water jacket is a double-tilted structure, an eight-shaped layout vehicle is used;

[0058] The lifting beam includes: a short lifting beam and a long lifting beam. The short lifting beam is arranged at the small head end of the shallow water jacket, and one or two rows of SPMT module vehicles are arranged below the small head end of the shallow water jacket; the long lifting beam is arranged at the large head end of the shallow water jacket, and multiple rows of SPMT module vehicles are arranged at the large head end of the shallow water jacket according to the transportation capacity requirements;

[0059] The design of lifting beams, loading pads and assembly pads also includes:

[0060] The loading pier is placed in advance during the land construction phase of the shallow water jacket, and the loading pier is loaded synchronously with the shallow water jacket;

[0061] A cylindrical connection base is provided above the loading pier, and the end of the cylindrical connection base is a flange structure, which can be connected with the column and the lifting beam through the flange to form a combined pier, and serve as a part of the assembly pier in the assembly stage;

[0062] Before the SPMT transportation of the shallow water jacket, the assembly cushion needs to be removed.

[0063] As a preferred embodiment of the present invention, when designing the transport support tooling, it includes:

[0064] The upper surface of the transport support tooling is paved with a rubber pad and has limiting structures on both sides, and the size of the transport support tooling is determined according to the width of the lifting beam;

[0065] When the structural strength of the transport support tooling cannot meet the requirements, it is optimized by adding reinforcement rings, changing the support position, and adding cover plates.

[0066] Compared with the prior art, the present invention has the following beneficial effects:

[0067] (1) The method provided by the present invention completes the construction of shallow water jackets in non-slideway areas, and subsequently uses SPMT to complete the roll-on / roll-off shipment of shallow water jackets. It is suitable for the construction of shallow water jackets of 5000T or less, 4-legged, without launching truss structure, and using the hoisting launching installation method. It can greatly reduce the occupancy rate of slideway resources in the construction site and improve the flexibility of shallow water jacket construction;

[0068] (2) The method provided by the present invention not only has the advantages of not occupying slideway resources, not requiring sliding and hauling equipment, having a small amount of prefabricated assembly piers, and reusable lifting beams, but also has the characteristics of convenient SPMT assembly, flexible transportation routes, low requirements for the sequence of construction stations, and short loading cycle, which is conducive to utilizing the non-slideway area of ​​the site, expanding the capacity for concurrent construction, reducing project costs, and greatly improving the site competitiveness;

[0069] (3) The transport tooling used in the present invention is simple in design, convenient for prefabrication, and reusable;

[0070] (4) In the absence of any domestic case studies on horizontal non-slide construction of shallow water jackets and SPMT roll-on / roll-off transportation, the present invention has established a set of concise and feasible construction processes, clarified the methods of settlement treatment and transportation design, and achieved domestic technological innovation and breakthroughs. By introducing new methods in the construction of shallow water jackets, technological progress in the industry has been achieved.

[0071] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a schematic diagram of a flow chart of an embodiment of the present invention;

[0073] Figure 2 This is a schematic diagram of the shallow water jacket structure of an embodiment of the present invention;

[0074] Figure 3 This is a schematic diagram of the SPMT layout method of an embodiment of the present invention;

[0075] Figure 4 The calculation result of the beam lifting in the embodiment of the present invention;

[0076] Figure 5 The calculation result of the full support reaction force of the shallow water jacket according to the embodiment of the present invention;

[0077] Figure 6 This is a schematic diagram of the main structure of the lifting beam according to an embodiment of the present invention;

[0078] Figure 7 A cross-sectional view of a beam-lifting latch structure according to an embodiment of the present invention;

[0079] Figure 8 This is a cross-sectional view of the beam-lifting latch structure of the embodiment of the present invention in which the connecting rod is not inserted in the AA section;

[0080] Fig. 9 The cross-sectional view of the connecting rod of the beam-lifting latch structure of the embodiment of the present invention in section AA has been inserted;

[0081] Fig.10 This is a cross-sectional view of the beam-lifting latch structure of the embodiment of the present invention in which the connecting rod is not inserted in the cross-sectional view of section BB;

[0082] Fig.11 The cross-sectional view of the connecting rod of the beam-lifting latch structure BB of the embodiment of the present invention has been inserted;

[0083] Fig.12 A structural diagram of a connecting rod according to an embodiment of the present invention;

[0084] Fig.13 A structural diagram of a fixing rod according to an embodiment of the present invention;

[0085] Fig.14 A schematic diagram of a combined cushion structure according to an embodiment of the present invention;

[0086] Fig.15 This is a schematic diagram of a shallow water jacket in a completed state according to an embodiment of the present invention;

[0087] Fig.16It is a schematic diagram of the layout of the central truss foundation modification area according to an embodiment of the present invention;

[0088] Fig.17 This is a flowchart of the SPMT lifting and settling process implementation according to an embodiment of the present invention;

[0089] Fig.18 This is a flowchart of the implementation of the corbel + jack lifting and settling process according to an embodiment of the present invention;

[0090] Fig.19 This is a graph showing the overall transportation stability calculation results of the shallow water jacket SPMT module vehicle of the present invention;

[0091] Fig. 20 The calculation result of the overall transportation strength of the shallow water jacket SPMT module vehicle of the present invention;

[0092] Fig.21 It is a schematic diagram of the structure of the transport tooling of the present invention.

[0093] Explanation of the accompanying numbers: 1. Shallow water conductor rack; 2. SPMT module vehicle; 3. Lifting beam; 4. Short lifting beam; 5. Long lifting beam; 6. Ship loading pier; 7. Buoy; 8. Curved package plate; 9. Conductor leg; 10. Tie bar; 11. SPMT load-sharing beam; 12. SPMT support pier; 13. Pads; 14. Rubber pad; 15. Limiting structure; 16. Foundation modification area; 17. Circular column; 18. Flange base; 19. Internal rib plate ; 20. Manhole; 21. Web plate of lifting beam; 22. Transverse rib plate; 23. Latch sleeve; 24. Guide tube; 25. Connecting rod; 26. Fixing rod; 27. Flange plate of lifting beam; 28. Limiting hole; 29. ​​Insertion depth scale; 30. Flange; 31. Handle; 32. Baffle; 33. Anti-slip bolt; 34. Support pillar; 35. Column flange; 36. Assembly pier; 37. Combined pier of lifting beam and loading ship; 38. Skirt pile sleeve. DETAILED DESCRIPTION

[0094] The method for constructing a non-slideway area of ​​a shallow water jacket 1 and for loading a SPMT on a ship by roll-on / roll-off means provided by the present invention comprises the following steps:

[0095] Step S1: obtaining parameters of the shallow water jacket 1 and the transport barge, and selecting a non-slideway construction area of ​​the shallow water jacket 1 and determining a construction sequence of the shallow water jacket 1 according to the obtained parameters;

[0096] Step S2: determining the pre-deployment scheme for the roll-on / roll-off loading of the SPMT according to the acquired parameters, and designing the lifting beam 3, the loading cushion 6 and the assembly cushion 36 for the roll-on / roll-off loading of the shallow water jacket 1 according to the pre-deployment scheme;

[0097] Step S3: obtaining the ground pressure of the non-slideway area of ​​the shallow water jacket 1 during construction, and performing foundation treatment on the non-slideway construction area of ​​the shallow water jacket 1 according to the ground pressure;

[0098] Step S4: Analyze the overall transportation stability of the SPMT module vehicle 2, and design local supports according to the stability analysis results;

[0099] Step S5: Determine the transportation path from the non-slideway construction area of ​​the shallow water jacket 1 to the transport barge according to the site layout of the non-slideway construction area of ​​the shallow water jacket 1 and the distribution of interference objects along the transportation path.

[0100] In the above step S1, when obtaining the parameters of the shallow water jacket 1 and the transport barge, it includes:

[0101] According to the design data of the shallow water jacket 1 and the information of the transport barge, the parameters of the shallow water jacket 1 and the transport barge are obtained;

[0102] The parameters of the shallow water jacket 1 include: the size, weight, center of gravity, specifications of components, wall thickness, material and main structure of the shallow water jacket 1; the parameters of the transport barge include: the length, width, bearing capacity and interference distribution of the transport barge deck.

[0103] In the above step S1, when selecting the non-slideway construction area of ​​the shallow water jacket 1 and determining the construction sequence of the shallow water jacket 1, it includes:

[0104] According to the size of the shallow water jacket 1 and the area and planning of the non-slideway construction area of ​​the shallow water jacket 1, the non-slideway construction area of ​​the shallow water jacket 1 is selected, and according to the structural characteristics of the shallow water jacket 1, the construction sequence of the shallow water jacket 1 is determined.

[0105] In the above step S2, when determining the pre-deployment plan for SPMT roll-on / roll-off shipment, it includes:

[0106] According to the main structure of shallow water jacket 1, the pre-deployment plan of SPMT roll-on / roll-off ship is determined;

[0107] Preliminarily determine the layout and position of the lifting beam 3 according to the pre-layout plan;

[0108] Among them, the pre-deployed vehicle solution must meet the length and width requirements of the transport barge deck;

[0109] When designing the lifting beam 3 for rolling installation of the shallow water jacket 1, the following aspects are included:

[0110] Extract the force model of the lifting beam 3, and design the lifting beam 3 according to the force model using design simulation software and offshore structure analysis software to determine the specifications, dimensions, materials, quantity, layout position, layout method and support position of the lifting beam 3;

[0111] The arrangement position of the lifting beam 3 needs to be aligned with the main structural node position of the shallow water jacket 1;

[0112] When designing the loading pad 6 for roll-on / roll-off of the shallow water jacket 1, the following are included:

[0113] Based on the parameters of the shallow water jacket 1 and the information of the lifting beam 3, the offshore structure analysis software is used to build a model to determine the force magnitude of the loading cushion 6;

[0114] According to the magnitude of the force, the loading cushion 6 is designed by using the design simulation software to determine the structural form of the loading cushion 6;

[0115] The arrangement and bottom surface of the loading pier 6 must meet the requirements of the size and bearing capacity of the transport barge deck;

[0116] When designing the assembly cushion 36 for the roll-on / roll-off of the shallow water jacket 1, the following are included:

[0117] Determine the layout position of the assembly cushion 36, establish a mechanical model through offshore structure analysis software, and determine the force magnitude of the assembly cushion 36;

[0118] The structural form of the assembly cushion 36 is determined by design simulation software.

[0119] Specifically, the offshore structure analysis software includes SACS software, and the design simulation software includes ANSYS software.

[0120] In the above step S3, when obtaining the ground pressure of the shallow water jacket 1 during the construction of the non-slideway area, it includes:

[0121] According to the foundation bearing capacity testing specifications and standards, the foundation of the supporting area is tested to obtain the foundation bearing capacity characteristic value and the maximum allowable value of the foundation bearing capacity;

[0122] According to the specifications and material information of the shallow water jacket 1, a mechanical model is established by using offshore structure analysis software, and according to the support position of the shallow water jacket 1, the pressure of each pier structure on the ground is obtained;

[0123] The pressure on the ground is compared with the maximum allowable value of the foundation bearing capacity. If it is greater than the maximum allowable value of the foundation bearing capacity, the assembly cushion 36 is redesigned and the support reaction force is obtained until the pressure on the ground is less than or equal to the maximum allowable value of the foundation bearing capacity.

[0124] When the foundation treatment is carried out in the non-slideway construction area of ​​the shallow water jacket 1, it includes:

[0125] In order to prevent uneven settlement during the construction phase of the shallow water jacket 1 and affect the construction accuracy, the foundation below the pad arrangement area in the non-slideway construction area of ​​the shallow water jacket 1 is treated;

[0126] The treatment method is: bury a reinforced concrete platform with a thickness that meets the requirements, and use cement mortar to level the top of the reinforced concrete platform, with the edges flush with the surrounding ground.

[0127] Specifically, the offshore structure analysis software includes SACS software, the design simulation software includes ANSYS software, and the established mechanical model includes a SACS mechanical model.

[0128] Preferably, the thickness of the reinforced concrete platform is 300 mm.

[0129] Furthermore, the method provided by the present invention also includes:

[0130] During the construction process of the non-slide construction area of ​​the shallow water jacket 1, if uneven settlement occurs, the settlement will be handled by lifting with SPMT, brackets and jacks;

[0131] Among them, when the settlement treatment is carried out by SPMT jacking, it includes:

[0132] The settlement point is lifted by SPMT and the lifting tooling above. After lifting to the specified height, the pad is placed in the lifting gap between the pad and the ground to complete the settlement compensation.

[0133] The SPMT and the lifting equipment above include: SPMT load-carrying beam 11, SPMT support pier 12, pad 13, pad;

[0134] When the settlement treatment is carried out by using the bracket and the jack, it includes:

[0135] Weld the corbel structure to the designated positions on both sides of the pillar where the settlement pad is located, and fix the jack above the corbel. After the jack is lifted to the designated height, place the pad into the lifting gap to complete the settlement compensation. Finally, remove the jack.

[0136] Specifically, the single-axle load capacity of SPMT is 48T / axle, and the total lifting capacity can be adjusted according to the actual situation, and the maximum lifting height can reach 600mm.

[0137] In the above step S4, when analyzing the overall transportation stability of the SPMT module vehicle 2, it includes:

[0138] According to the pre-layout plan and the design of the lifting beam 3, the loading pad 6 and the assembly pad 36, the layout plan and the distribution position of the transport support points are finally determined; the spacing of the transport support points must meet the transportation and use requirements of the SPMT module vehicle 2 manufacturer. If not, a load-sharing beam is installed on the SPMT module vehicle 2;

[0139] Analysis of the transportation process of the SPMT module vehicle 2: using Excel software to edit the transportation parameter calculation formula, substituting the total shipping weight, center of gravity position, distribution position of the transportation support points finally determined, and layout position of the SPMT module vehicle 2 of the shallow water jacket 1 into the transportation parameter calculation formula for calculation, and obtaining several transportation parameters, including: total vehicle load, vehicle rated load utilization rate, axle load, axle pressure, stability angle, ground pressure, and transportation support force;

[0140] Conduct transportation condition verification of shallow water jacket 1: establish a SACS mechanical model for shallow water jacket 1 transportation based on the specifications and materials of the components of shallow water jacket 1 and the distribution of the transportation support points finally determined, and verify the overall structural strength of shallow water jacket 1 under transportation conditions based on the transportation support force as the calculation input condition;

[0141] If some transport parameters and overall structural strength of the shallow water jacket 1 cannot meet the requirements, the arrangement position of the SPMT module vehicle 2 is readjusted until the requirements are met;

[0142] When designing local supports, include:

[0143] According to the force of the transport support, the transport support tooling is designed using ANSYS software general finite element modeling, and the structural strength of the transport support tooling is checked;

[0144] If the structural strength of the transport support tooling does not meet the requirements, the transport support tooling will be redesigned until the strength requirements are met.

[0145] In the above step S5, when determining the transportation path, it also includes:

[0146] The distribution of the mooring posts and fairleads above the transport barge deck and the arrangement position of the loading pad 6 are obtained to determine the final position of the shallow water jacket 1 on the transport barge; if interference occurs, the interference is removed.

[0147] In the above step S2, the pre-deployment plan for SPMT roll-on / roll-off shipment includes:

[0148] If the main leg of the shallow water jacket 1 is a double-tilted structure, the figure-eight layout vehicle is adopted;

[0149] The lifting beam 3 includes: a short lifting beam 4 and a long lifting beam 5. The short lifting beam 4 is arranged at the small head end of the shallow water jacket 1, and one or two rows of SPMT module vehicles 2 are arranged below the small head end of the shallow water jacket 1; the long lifting beam 5 is arranged at the large head end of the shallow water jacket 1, and multiple rows of SPMT module vehicles 2 are arranged at the large head end of the shallow water jacket 1 according to the transportation capacity requirements;

[0150] When designing the lifting beam 3, the loading cushion 6 and the final assembly cushion 36, it also includes:

[0151] The loading pad 6 is placed in advance during the land construction phase of the shallow water jacket 1, and the loading pad 6 is loaded onto the ship synchronously with the shallow water jacket 1. The above process ensures that the loading pad 6 does not interfere with the transportation path of the SPMT, while improving the transportation flexibility of the shallow water jacket 1 during roll-on / roll-off loading.

[0152] The loading cushion 6 is provided with a cylindrical connection base on the top, and the end of the cylindrical connection base is a flange structure, which can be combined with the column and the lifting beam 3 through the flange connection to form a combined cushion, and is used as a part of the final assembly cushion 36 in the final assembly stage;

[0153] Before the shallow water jacket 1 is transported by SPMT, the assembly cushion 36 needs to be removed to prevent it from interfering with the transportation path. The assembly cushion 36 can be supported by a 6*2*1.2m standard slide block, and the upper part is composed of a round tube and an arc-shaped package plate 8. The specifications can be determined according to the support reaction force calculation.

[0154] Furthermore, when designing the lifting beam 3, the loading pier 6 and the assembly pier 36, the lifting beam 3 is a box-type structure composed of upper and lower flange plates, a center web plate, two side web plates and a rib plate. The rib plate and the two side web plates are provided with manholes 20 for personnel to work during the prefabrication of the lifting beam 3. A circular tube support and an arc-shaped wrapping plate 8 are provided at a specific position above the lifting beam 3 to support the main conductor leg of the shallow water conductor frame 1. A layer of rubber pad 14 is attached inside the arc-shaped wrapping plate 8 to increase the friction between the contact interfaces and eliminate local concentrated forces.

[0155] According to the structural form of the shallow water jacket 1 and the arrangement position of the lifting beam 3, the lifting beam 3 can be divided into two forms: a short lifting beam 4 and a long lifting beam 5.

[0156] The short lifting beams 4 in the same row can be connected and fixed by two connecting rods 25 to improve their overall rigidity and transportation stability.

[0157] The end of the short lifting beam 4 is provided with a latch structure for fixing the connecting rod 25 . The latch structure is composed of a pair of cylindrical latch sleeves 23 , a fixing rod 26 , and a guide tube 24 .

[0158] The connecting rods 25 can be connected and lengthened by the flange 30 to adapt to different widths of the shallow water jacket frame 1. The limiting holes 28 are evenly distributed at intervals of 500 mm at the insertion end of the connecting rod 25, which are used to pass the fixing rod 26 to adjust the connection length of the connecting rod 25. The opening of the limiting hole 28 is chamfered to facilitate the insertion of the fixing rod 26.

[0159] The latch sleeve 23 is installed inside the short lifting beam 4, and two are installed in each short lifting beam 4, arranged symmetrically. The latch sleeve 23 is fixed by welding to the transverse rib plate 22 inside the short lifting beam 4. The latch sleeve 23 and both sides of the lifting beam 3 are provided with openings for the fixing rod 26 to pass through, and the spacing between the openings is the same as the limiting hole 28 of the connecting rod 25.

[0160] The fixing rod 26 has a baffle plate 32 at one end to facilitate its insertion and positioning. The baffle plate 32 has a handle 31 on the outside to facilitate the removal of the fixing rod 26 after use. The other end of the fixing rod 26 is tapered to improve the smoothness of its insertion; a bolt hole is opened behind the tapered end to install a stop bolt 33 after the fixing rod 26 is in place to prevent the fixing rod 26 from accidentally falling off during use.

[0161] The guide tube 24 is installed between the web plate 21 of the lifting beam and the latch sleeve 23, and between the latch sleeve 23 and the latch sleeve 23, and plays a guiding role when the fixing rod 26 is inserted. The two ends of the guide tube 24 are provided with inner chamfers to facilitate the insertion of the fixing rod 26.

[0162] The long lifting beam 5 and the short lifting beam 4 are provided with cylindrical connecting bases at the bottom of both ends, and the ends of the bases are flange structures, which can be connected with and split from the columns below.

[0163] Circular flanges are installed at both ends of the column for connecting and fixing with the upper lifting beam and the loading pad 6 below; the column can be prefabricated into various specifications such as 1.5m, 2m, 2.5m, 3m, etc. to adapt to different sizes of shallow water jackets 1.

[0164] The two end surfaces of the short lifting beam 4 are provided with latch structures, which facilitate the latch connection and fixation between the short lifting beams 4, thereby improving their overall rigidity and transportation stability. The two ends of the long and short lifting beams are also provided with latch structures below, which are used to install the loading pad 6 below. The long and short lifting beams are connected to the loading pad 6 by latches through supporting round tubes.

[0165] In the above step S4, when designing the transport support tooling, it includes:

[0166] The upper surface of the transport support tooling is paved with a rubber pad 14 and the two sides are provided with a limiting structure 15, and the size of the transport support tooling is determined according to the width of the lifting beam 3;

[0167] When the structural strength of the transport support tooling cannot meet the requirements, it can be optimized by adding reinforcement rings, changing the support position, and adding cover plates.

[0168] Specifically, when determining the size of the transport support tooling, it is necessary to ensure that the transport support tooling is larger than the width of the lifting beam 3 , so as to ensure the stability of the lifting beam 3 .

[0169] The following examples are provided to further illustrate the present invention, but the scope of the present invention is not limited thereto.

[0170] like Figure 1 As shown, this embodiment provides a method for constructing a non-slideway area of ​​a deepwater and shallowwater jacket 1, which comprises the following steps:

[0171] (1) Obtaining parameters of shallow water jacket 1 and transport barge;

[0172] (2) Selection of non-slideway construction area and design of shallow water jacket 1 construction sequence;

[0173] (3) SPMT roll-on / roll-off ship layout vehicle pre-design;

[0174] (4) Design of the shallow water jacket 1 roll-on / roll-off beam 3, loading pier 6 and assembly pier 36;

[0175] (5) Calculation of ground pressure and foundation treatment in non-slideway construction areas;

[0176] (6) Settlement treatment of non-slideway construction of shallow water jacket 1;

[0177] (7) Calculation of overall transport stability and local support design of SPMT modular vehicle 2;

[0178] (8) Transportation route design.

[0179] Taking a 4-leg 8-skirt shallow water jacket as an example, step (1) is performed to obtain the parameters of the shallow water jacket 1 and the transport barge, such as Figure 2 As shown, the size, weight, center of gravity, specifications, materials, and wall thickness of the shallow water conductor frame 1 are obtained through the design drawings, and the deck length and width, bearing capacity, draft, interference distribution and other information of the transport barge are obtained through the ship specification and deck layout drawing.

[0180] Furthermore, step (2) of selecting a non-slideway construction area and designing a construction sequence of the shallow water jacket 1 is performed; based on the size of the shallow water jacket 1 in step (1) and the total construction area and planning, the location of the non-slideway construction area of ​​the shallow water jacket 1 is selected, and the construction sequence is determined according to the structural characteristics of the shallow water jacket 1.

[0181] Further, step (3) SPMT roll-on / roll-off ship layout vehicle pre-design is carried out.

[0182] Step (3.1) Preliminarily determine the SPMT layout scheme based on the main structure of the shallow water jacket 1 in step (1). If the main legs of the shallow water jacket 1 are arranged in parallel or have parallel launching trusses, the "straight" layout can be adopted; if Figure 3 If the main leg of the shallow water jacket 1 is a double-tilted structure, the "figure eight" layout can be adopted.

[0183] The SPMT deployment plan in step (3.2) must meet the length and width requirements of the barge deck in step (1).

[0184] Furthermore, the design of the rolling beam 3, the loading pier 6 and the final assembly pier 36 of the shallow water jacket 1 in step (4) is carried out.

[0185] Step (4.1) According to the SPMT pre-layout plan of step (3.1), determine the placement, quantity and type requirements of the lifting beam, then extract the force model of the lifting beam 3, and use ANSYS and SACS software to design the lifting beam 3, such as Figure 4 Determine the specifications, dimensions, materials, quantity, layout position, layout method, support position and other information of the lifting beam 3. The layout position of the lifting beam 3 needs to be aligned with the main structure node position of the shallow water jacket 1.

[0186] Step (4.2) To ensure that the loading pad does not interfere with the transportation path of SPMT and improve the transportation flexibility of the shallow water jacket during roll-on / roll-off loading, the loading pad is placed in advance during the land construction phase of the shallow water jacket and loaded simultaneously with the shallow water jacket when the shallow water jacket is loaded. The loading pad is connected with the column and the lifting beam through flanges to form a combined pad, which serves as a part of the assembly pad during the assembly phase. Based on the shallow water jacket 1 information obtained in step (1), the barge deck information and the lifting beam 3 information in step (4.1), SACS software is used for modeling and calculation to determine the force magnitude of the loading pad 6 and the column; based on the force magnitude, the loading pad 6 is designed by ANSYS software to determine its structural form; the layout and bottom surface of the loading pad 6 meet the transport barge deck size and deck bearing capacity requirements in step (1), and the support height of the column needs to meet the shallow water jacket size requirements in step (1).

[0187] Step (4.3) According to step (2) and steps (4.1) and (4.2), the arrangement position of the assembly cushion 36 is determined, a mechanical model is established by SACS software, and the magnitude of the support reaction force of the assembly cushion 36 is calculated, such as Figure 5As shown, the structural form of the assembly pier 36 is determined by ANSYS software calculation. Before the shallow water jacket SPMT is transported, the assembly pier needs to be removed to prevent it from interfering with the transportation path. The assembly pier can be supported by a 6*2*1.2m standard slide block, and the upper part is composed of a round tube and an arc-shaped package plate. The specifications can be determined according to the support reaction force calculation.

[0188] Step (4.4) Based on the calculation results of the above steps, the lifting beams, columns and loading piers are designed according to the following standards.

[0189] The lifting beam 3 is a box-shaped structure composed of upper and lower flange plates, a center web plate, two side web plates, and a rib plate. The rib plate and the two side web plates have manholes for personnel to work during the prefabrication of the lifting beam 3. A circular tube support and an arc-shaped wrapping plate 8 are provided at a specific position above the lifting beam 3 to support the main conductor leg of the shallow water conductor rack 1. A layer of rubber pad 14 is attached inside the arc-shaped wrapping plate 8 to increase the friction between the contact interfaces and eliminate local concentrated forces, such as Figure 6 shown.

[0190] According to the double-tilt structure of the shallow-water jacket, the short lifting beam is arranged at the small end of the shallow-water jacket, and the long lifting beam is arranged at the large end. The short lifting beams in the same row are connected and fixed by two connecting rods 25 to improve their overall rigidity and transportation stability. The end of the short lifting beam is provided with a latch structure for fixing the connecting rod 25. The latch structure is composed of a pair of cylindrical latch sleeves 23, a fixing rod 26, and a guide tube 24 (such as Figure 7-11 The connecting rods 25 can be connected to each other by flanges 30 to extend the length to adapt to different shallow water jacket widths. The insertion ends of the connecting rods 25 are evenly spaced at intervals of 500 mm to allow the fixing rods 26 to pass through to adjust the connection length of the connecting rods 25 (such as Fig.12 As shown). The opening of the limiting hole 28 is chamfered to facilitate the insertion of the fixing rod 26. The latch sleeve 23 is installed inside the short lifting beam, and two are installed on each short lifting beam in a symmetrical arrangement. The latch sleeve 23 is fixed by welding to the transverse rib plate 22 inside the short lifting beam. There are openings on both sides of the sleeve for the fixing rod 26 to pass through, and the spacing between the openings is the same as that of the limiting hole 28 of the connecting rod 25. A baffle 32 is provided at one end of the fixing rod 26 to facilitate its insertion and positioning; a handle 31 is provided on the outside of the baffle 32 to facilitate the removal of the fixing rod 26 after use; the other end of the fixing rod 26 is tapered to improve the smoothness of its insertion; a bolt hole is provided at the rear of the tapered end for installing the anti-slip bolt 33 after the fixing rod 26 is in place to prevent the fixing rod 26 from accidentally falling off during use (such as Fig.13As shown). The guide tube 24 is installed between the web 21 of the lifting beam and the latch sleeve 23, and between the latch sleeves 23 and the latch sleeves 23, and plays a guiding role when the fixing rod 26 is inserted. Both ends of the guide tube 24 have inner chamfers to facilitate the insertion of the fixing rod 26. There are cylindrical connecting bases at the bottom of the long lifting beam and the short lifting beam. The end of the base is a flange structure, which can be connected and split with the column below. Circular flanges are installed at both ends of the column for connection and fixation with the lifting beam above and the loading pier below; the column can be prefabricated into various specifications such as 1.5m, 2m, 2.5m, 3m, etc. to adapt to different shallow water conductor rack sizes.

[0191] After the prefabrication of step (4.5) lifting beam 3, loading pier 6, and final assembly pier 36 is completed, they are placed in advance at the predetermined position at the final assembly site. First, the loading pier is placed in advance according to the position of the loading pier determined in steps (4.1) and (4.3), and then the pillars of appropriate specifications and height are selected and connected and fixed through the flange base 18 above the pier; after all the loading piers and columns are installed, the lifting beam is installed. The long and short lifting beams are all assembled through the reserved final assembly lifting points using a crawler crane. After the lifting beam is in place, it is fixed to the lower column through the flange base 18 at its bottom (such as Fig.14 As shown); finally, the short lifting beam at the small head end of the shallow water conductor frame is reinforced. First, according to the arrangement spacing of the small lifting beams in the same row, the connecting rod 25 of appropriate length and quantity is selected, and one end of the connecting rod 25 is inserted into the latch sleeve 23 at the end of the short lifting beam. After inserting to the specified depth, the fixing rod 26 is used to penetrate from the opening on one side of the lifting beam and pass through the guide tube 24 and the limiting hole 28 of the connecting rod 25 and pass out from the other side of the lifting beam. Then, the anti-slip bolt 33 is installed at the end of the cone head to complete the fixing of the fixing rod 26 to the connecting rod 25 (as shown in FIG. Figure 7-11 As shown), the connecting rod 25 is then butted and fixed by the end flange of the connecting rod 25.

[0192] After all the lifting beams, columns, loading piers and assembly piers are ready, the shallow water jacket is assembled on top of them according to the construction sequence. After the shallow water jacket is completed, the work preparation before loading is carried out, such as Fig.15 shown.

[0193] Furthermore, step (5) is performed to calculate the ground pressure in the non-slideway construction area and to perform foundation treatment.

[0194] Step (5.1) In accordance with the foundation bearing capacity test specifications and standards, the foundation of the supporting area is tested to obtain the characteristic value of the foundation bearing capacity and the maximum allowable value of the foundation bearing capacity.

[0195] Step (5.2) establishes a SACS mechanical model through the information such as the specifications and materials of the parts of the shallow water jacket 1 in step (1), and calculates the pressure of each pier structure on the ground in combination with the support position of the shallow water jacket 1 determined in step (4), and compares it with the maximum allowable value of the foundation bearing capacity obtained in step (5.1). If the bearing capacity is not met, redesign the assembly pier 36 and calculate the support reaction force until the requirements of step (5.1) are met.

[0196] Step (5.3) To prevent uneven settlement during the construction of the shallow water jacket 1 and affect the construction accuracy, the foundation below the pad arrangement area described in steps (4.2) and (4.3) is treated, such as Fig.16 shown.

[0197] The solution is to bury a 300mm thick reinforced concrete platform, level it with cement mortar, and make the edges flush with the surrounding ground.

[0198] Further, step (6) non-slideway construction and settlement treatment of the shallow water jacket 1 is performed.

[0199] During the construction of the shallow water jacket 1 in the non-slideway area, if uneven settlement occurs, SPMT lifting and bracket and jack lifting measures can be adopted to deal with the settlement. Figure 17-18 If no uneven settlement occurs, ignore this step.

[0200] Further, step (7) is performed to calculate the overall transportation stability and local support design of the SPMT module vehicle 2:

[0201] Step (7.1) finally determines the layout plan of SPMT module vehicle 2 and the distribution position of the transport support points according to steps (3) and (4). The support spacing must meet the transportation and use requirements of the SPMT module vehicle 2 manufacturer. If it does not meet the requirements, install a load-sharing beam on the SPMT module vehicle 2.

[0202] Step (7.2) analyzes the transportation process of the SPMT module vehicle 2. The Excel software is used to input the total shipping weight and center of gravity position of the shallow water jacket 1 in step (1), the transportation support position information in step (7.1), and the layout position of the SPMT module vehicle 2, and calculate the total vehicle load, vehicle rated load utilization rate, axle load, axle pressure, stability angle, ground pressure, and transportation support force parameters, such as Fig.19 shown.

[0203] Step (7.3) verifies the shallow water jacket 1 transportation condition. Based on the information such as the part specifications and materials of the shallow water jacket 1 in step (1) and the transportation support position in step (7.1), the SACS mechanical model of the shallow water jacket 1 transportation is established. The transportation support force in (7.2) is used as the calculation input condition to verify the overall structural strength of the shallow water jacket 1 under the transportation condition. Fig. 20 shown.

[0204] If step (7.2) or (7.3) cannot meet the requirements, recalculate by re-adjusting the layout position of SPMT module car 2 until it is met.

[0205] 7.4) Design the transport support according to the transport support stress conditions in step (7.2) and check its structural strength. Use ANSYS general finite element modeling to complete the design and calculation process. If it does not meet the requirements, redesign the transport support tooling and calculate until it meets the strength requirements. The transport tooling structure is as follows Fig.21 shown.

[0206] Next, proceed to step (8) transportation route design:

[0207] The transportation path of the shallow water jacket 1 from the non-slideway construction area to the transport barge is determined based on the site layout of the construction site and the distribution of interference objects along the transportation path. The final position of the shallow water jacket 1 on the barge is determined based on the distribution of structures such as mooring posts and fairleads above the barge deck in step (1) and the distribution of loading pads 6 in step (4). If interference occurs, the interference object needs to be removed.

[0208] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for constructing a non-slideway area of ​​a shallow water jacket and for loading SPMT on a ship, characterized in that: The following steps are involved: Acquiring parameters of the shallow water jacket and the transport barge, and selecting a non-slideway construction area of ​​the shallow water jacket according to the acquired parameters and determining a construction sequence of the shallow water jacket; Determine the pre-deployment plan for the SPMT roll-on / roll-off loading according to the acquired parameters, and design the lifting beam, loading pier and assembly pier for the shallow water jacket roll-on / roll-off loading according to the pre-deployment plan; Acquiring the ground pressure of the non-slideway construction area of ​​the shallow water jacket during construction, and performing foundation treatment on the non-slideway construction area of ​​the shallow water jacket according to the ground pressure; Analyze the overall transportation stability of the SPMT modular vehicle and design the local support based on the stability analysis results; Determine a transportation path from the shallow water jacket non-slideway construction area to the transport barge according to the site layout of the shallow water jacket non-slideway construction area and the distribution of interference objects along the transportation path; Among them, when determining the pre-deployment plan for SPMT roll-on / roll-off shipment, it includes: According to the main structural form of the shallow water jacket, determine the pre-deployment plan for SPMT roll-on / roll-off loading; Preliminarily determine the layout and position of the lifting beam according to the pre-layout plan; The pre-deployment vehicle solution must meet the length and width requirements of the deck of the transport barge; When designing the lifting beam for the shallow water jacket roll-on / roll-off ship loading, the following aspects are included: Extract the force model of the lifting beam, and design the lifting beam according to the force model using design simulation software and offshore structure analysis software to determine the specification, size, material, quantity, layout position, layout method and support position of the lifting beam; Wherein, the arrangement position of the lifting beam needs to be aligned with the main structural node position of the shallow water jacket; When designing the loading pier for the shallow water jacket roll-on / roll-off loading, the following aspects shall be included: Based on the parameters of the shallow water jacket and the information of the lifting beam, modeling is performed using offshore structure analysis software to determine the force magnitude of the loading pier; According to the magnitude of the force, the loading pier is designed by using a design simulation software to determine the structural form of the loading pier; The arrangement and bottom surface of the loading pier must meet the requirements of the size and bearing capacity of the deck of the transport barge; When designing the assembly cushion for the shallow water jacket roll-on / roll-off ship, the following aspects shall be included: Determine the layout position of the assembly pier, establish a mechanical model through offshore structure analysis software, and determine the force magnitude of the assembly pier; The structural form of the assembly cushion is determined by design simulation software.

2. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a roll-on / roll-off ship according to claim 1, characterized in that: When obtaining parameters for shallow water jackets and transport barges, include: According to the design data of the shallow water jacket and the information of the transport barge, parameters of the shallow water jacket and the transport barge are obtained; The parameters of the shallow water jacket include: the size, weight, center of gravity, specifications of components, wall thickness, material and main structure of the shallow water jacket; the parameters of the transport barge include: the length, width, bearing capacity and interference distribution of the deck of the transport barge.

3. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a roll-on / roll-off ship according to claim 2, characterized in that: When selecting a non-skidway construction area for a shallow water jacket and determining a construction sequence for the shallow water jacket, it includes: The non-slideway construction area of ​​the shallow water jacket is selected according to the size of the shallow water jacket and the area and planning of the non-slideway construction area of ​​the shallow water jacket, and the construction sequence of the shallow water jacket is determined according to the structural characteristics of the shallow water jacket.

4. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a ship as claimed in claim 2, characterized in that: When obtaining the ground pressure during the construction of the non-slideway construction area of ​​the shallow water jacket, it includes: According to the foundation bearing capacity testing specifications and standards, the foundation of the supporting area is tested to obtain the foundation bearing capacity characteristic value and the maximum allowable value of the foundation bearing capacity; According to the specifications and material information of the shallow water jacket, a mechanical model is established by using offshore structure analysis software, and according to the support position of the shallow water jacket, the pressure of each pier structure on the ground is obtained; Compare the pressure on the ground with the maximum allowable value of the foundation bearing capacity, and if it is greater than the maximum allowable value of the foundation bearing capacity, redesign the assembly cushion and obtain the support reaction force until the pressure on the ground is less than or equal to the maximum allowable value of the foundation bearing capacity; When the foundation treatment is performed on the non-slideway construction area of ​​the shallow water jacket, it includes: Treating the foundation below the pad arrangement area in the non-slideway construction area of ​​the shallow water jacket; The treatment method is: bury a reinforced concrete platform with a thickness that meets the requirements, and use cement mortar to level the top of the reinforced concrete platform so that the edge is flush with the surrounding ground.

5. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a ship by roll-on / roll-off according to claim 1, characterized in that: Also includes: If uneven settlement occurs in the non-slideway construction area of ​​the shallow-water jacket during construction, settlement treatment is carried out by lifting with SPMT and brackets in combination with jacks; Among them, when the settlement treatment is carried out by SPMT jacking, it includes: The settlement point is lifted by SPMT and the lifting tooling above. After lifting to the specified height, the pad is placed in the lifting gap between the pad and the ground to complete the settlement compensation. The SPMT and the lifting tooling above include: SPMT load-sharing beams, SPMT support piers, pads, and pads; When the settlement treatment is carried out by using the bracket and the jack, it includes: Weld the corbel structure to the designated positions on both sides of the pillar where the settlement pad is located, and fix the jack above the corbel. After the jack is lifted to the designated height, place the pad into the lifting gap to complete the settlement compensation.

6. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a ship by roll-on / roll-off according to claim 2, characterized in that: When analyzing the overall transportation stability of the SPMT modular vehicle, it includes: According to the pre-deployment plan and the design of the lifting beam, loading pad and assembly pad, the deployment plan and the distribution position of the transport support points are finally determined; the spacing of the transport support points must meet the manufacturer's transportation and use requirements of the SPMT modular vehicle. If not, a load-sharing beam is installed on the SPMT modular vehicle; According to the shipping gross weight, the center of gravity position, the distribution position of the transport support points finally determined and the layout position of the SPMT module vehicle of the shallow water jacket, a number of transport parameters are obtained, wherein the number of transport parameters include: the total load weight of the vehicle body, the rated load utilization rate of the vehicle body, the axle load, the axle pressure, the stability angle, the ground pressure and the transport support force; Establishing a shallow water jacket transport mechanics model according to the specifications and materials of the components of the shallow water jacket and the distribution positions of the transport support points finally determined, and verifying the overall structural strength of the shallow water jacket under transport conditions according to the transport support forces; If the transportation parameters and overall structural strength of the shallow water jacket cannot meet the requirements, the layout of the SPMT module vehicle is readjusted until the requirements are met; When designing local supports, include: According to the transport support force, a transport support tooling is designed by using a general finite element modeling of a design simulation software, and the structural strength of the transport support tooling is checked; If the structural strength of the transport support tooling cannot meet the requirements, the transport support tooling is redesigned until the strength requirements are met.

7. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a ship by roll-on / roll-off according to claim 1, characterized in that: When determining the transport route, also include: The distribution of the mooring posts and fairleads above the deck of the transport barge and the arrangement of the loading piers are obtained to determine the final position of the shallow water jacket on the transport barge; if interference occurs, the interference is removed.

8. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a ship by roll-on / roll-off according to claim 1, characterized in that: The SPMT roll-on / roll-off pre-deployment plan includes: If the main leg of the shallow water jacket is a double-tilted structure, an eight-shaped layout vehicle is used; The lifting beam includes: a short lifting beam and a long lifting beam. The short lifting beam is arranged at the small head end of the shallow water jacket, and one or two rows of SPMT module vehicles are arranged below the small head end of the shallow water jacket; the long lifting beam is arranged at the large head end of the shallow water jacket, and multiple rows of SPMT module vehicles are arranged at the large head end of the shallow water jacket according to the transportation capacity requirements; The design of lifting beams, loading pads and assembly pads also includes: The loading pier is placed in advance during the land construction phase of the shallow water jacket, and the loading pier is loaded synchronously with the shallow water jacket; A cylindrical connection base is provided above the loading pier, and the end of the cylindrical connection base is a flange structure, which can be connected with the column and the lifting beam through the flange to form a combined pier, and serve as a part of the assembly pier in the assembly stage; Before the SPMT transportation of the shallow water jacket, the assembly cushion needs to be removed.

9. The method for constructing a non-slideway area of ​​a shallow water jacket and loading a SPMT on a ship by roll-on / roll-off according to claim 6, characterized in that: When designing transport support tooling, include: The upper surface of the transport support tooling is paved with a rubber pad and has limiting structures on both sides, and the size of the transport support tooling is determined according to the width of the lifting beam; When the structural strength of the transport support tooling cannot meet the requirements, it is optimized by adding reinforcement rings, changing the support position, and adding cover plates.

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