TU type barge and floating installation method for marine structure

Abstract

The present invention discloses a T-U type barge, wherein the T-U type hull comprises a T-shaped bow, a U-shaped stern and a middle hull; the slide rail device comprises a transverse slide rail and a middle longitudinal slide rail arranged on the middle hull deck, and the bow longitudinal slide rail and the stern longitudinal slide rail are respectively arranged on the T-shaped bow and the U-shaped stern deck; the block support device comprises a transverse slide shoe slidably installed above the transverse slide rail, and a longitudinal slide shoe slidably installed above the transverse slide shoe, and the block is located on the longitudinal slide shoe; the pile holding device is installed on the outer side of the T-shaped bow and the inner side of the U-shaped stern, and is used to hold the marine structure block to be installed in the unfolded state; the propulsion devices at various positions of the dynamic positioning system are all independently controlled, and the automatic adjustment of the position of the barge can be realized. The present invention can be applied to the installation of large platforms or small platforms, floating platforms or fixed platforms, solves the problem of limited application scope of floating installation of monohulls and catamarans, simplifies the installation process, and improves construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of offshore floating platform installation, and in particular to a TU-type barge and a method for installing an offshore structure floating. Background Art

[0002] In offshore oil and gas development projects, various production and production platforms need to be built at sea. In recent years, with the rapid development of marine engineering construction, various types of offshore production and production platforms have begun to develop in the direction of large-scale, integrated, and deep sea, and the overall weight of the platform has also continued to increase.

[0003] The traditional large-scale module floating installation system uses tugboats to control the movement of barges and assist in the floating operation. Due to the influence of wind, waves, currents, etc., the barge will move forward and backward, swing left and right, and float up and down. Therefore, it is difficult for the tugboat to effectively control the movement of the barge according to the predetermined design requirements, which brings great risks to the installation operation. The larger and heavier the module, the more difficult it is to control the movement of the barge. According to the number of barges during module installation, the floating method can be divided into two categories: single-ship floating installation method and double-ship floating installation method.

[0004] Catamaran floating installation first transports the upper module by a single barge, transfers it to the catamaran when it arrives at the pre-prepared position, and then transports it to the installation position by the catamaran. It is usually used on Spar platforms. Its operation process is complicated, the construction is difficult, the environmental conditions are strict, and the economic benefits are low. The single-ship floating installation method is the most widely used. The modules installed by the single-ship floating installation method need to be specially designed for the lower support structure according to the scale of the barge used for installation. It has good economic benefits and construction efficiency for the jacket platform, that is, a barge is used to realize the installation connection between the offshore platform module and the jacket, and the platform module is transferred from the single hull to the jacket by adjusting the load or lowering the tide level; but for the installation of floating platforms, its construction experience and technology are not yet mature. The installation of floating platforms needs to solve the problem of violent response between the floating platform and the barge and the upper modules under the action of environmental loads. Although new installation methods such as T-shaped barges reduce the response amplitude, their application is too limited and the economic benefits are low, which is not suitable for large-scale market application. Summary of the invention

[0005] The main purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and to provide a TU-type barge and a floating installation method for an offshore structure, which can be applied to the installation of large platforms or small platforms, floating platforms or fixed platforms, solves the problem of limited application scope of floating installation of monohulls and catamarans, simplifies the installation process, and improves construction efficiency.

[0006] The technical solution adopted by the present invention is:

[0007] A TU-type barge comprises a TU-type hull, a slide rail device, a block support device, a pile holding device and a dynamic positioning system; the TU-type hull comprises a T-shaped bow, a U-shaped stern and a middle hull; the outer side of the T-shaped bow forms a bow workstation, and the inner side of the U-shaped stern forms a stern workstation; the slide rail device comprises a transverse slide rail and a middle longitudinal slide rail arranged on the middle hull deck, a bow longitudinal slide rail arranged on the T-shaped bow deck, and a stern longitudinal slide rail arranged on the U-shaped stern deck; the block support device comprises a transverse slide shoe slidably mounted above the transverse slide rail, and a longitudinal slide shoe slidably mounted above the transverse slide shoe, and the marine structure block to be installed is located on the longitudinal slide shoe; the overall thickness of the transverse slide shoe after assembly with the transverse slide rail is equal to the thickness of the middle longitudinal slide rail / the bow longitudinal slide rail / the stern longitudinal slide rail ; The shape of the longitudinal slide shoe is adapted to the bow longitudinal slide rail / the aft longitudinal slide rail. When the transverse slide shoe moves until the longitudinal slide shoe is coaxial with the bow longitudinal slide rail / the aft longitudinal slide rail, the longitudinal slide shoe can be moved to the bow longitudinal slide rail / the aft longitudinal slide rail, thereby transferring the marine structure module to be installed to the bow workstation / the aft workstation; The pile holding device is installed on the outer side of the T-shaped bow and the inner side of the U-shaped stern. The pile holding device can switch between an unfolded state and a folded state. In the unfolded state, it is used to hold the marine structure module to be installed, and in the folded state, it acts as a fender; The dynamic positioning system includes a bow propulsion device, a stern propulsion device, a stern side propulsion device, and a midship side propulsion device, and they are symmetrically arranged about the longitudinal centerline of the hull. The propulsion devices at each position are independently controlled, which can realize automatic adjustment of the position of the barge.

[0008] In the above scheme, the transverse slide rail is a transverse concave slide rail, the middle longitudinal slide rail is a longitudinal square slide rail, the head longitudinal slide rail is a head longitudinal concave slide rail, and the tail longitudinal slide rail is a tail longitudinal concave slide rail; the transverse slide shoe is a transverse convex slide shoe, and the longitudinal slide shoe is a longitudinal convex slide shoe.

[0009] In the above scheme, a fixed guide base is installed on the transverse sliding shoe, and a longitudinal sliding shoe penetration groove is provided on the fixed guide base.

[0010] In the above scheme, a block support component is installed on the longitudinal sliding shoe, and a block separation hydraulic rod is provided in the middle of the block support component. The marine structure block to be installed is connected to the block separation hydraulic rod through the load-bearing truss at the bottom. The weight transfer of the marine structure block to be installed is achieved by lowering the block separation hydraulic rod. When the weight transfer reaches 100%, the block separation hydraulic rod is separated from the load-bearing truss.

[0011] In the above scheme, the pile holding device includes a side slide rail, an angle adjustment hydraulic rod, a position adjustment hydraulic rod, a hydraulic rod base, a front end hinged rod, a rear end hinged rod, a front end fender, and a rear end fender; the side slide rail is arranged along the length direction of the ship and fixed to the side; the rear end and the front end of the angle adjustment hydraulic rod are respectively connected to the rear end slider and the front end slider on the side slide rail through the rear end long bearing and the front end long bearing; the front end of the position adjustment hydraulic rod is connected to the rear end long bearing, and the rear end is connected to the hydraulic rod base, and the hydraulic rod base is fixedly installed on the side; the front end of the front end hinged rod is hinged to the front end long bearing, and the rear end is hinged to the short bearing; the front end of the rear end hinged rod is hinged to the short bearing, and the rear end is hinged to the rear end long bearing; the front end fender is installed on the outer side of the front end hinged rod, and the rear end fender is installed on the outer side of the rear end hinged rod.

[0012] In the above scheme, the front fender and the rear fender have the same structure, both including a steel plate, a rubber installed on the surface of the steel plate, a fixing knot installed on the back of the steel plate and a supporting truss, and the fixing knot is used to connect the steel plate and the front hinge rod / rear hinge rod.

[0013] In the above scheme, the pile holding device also includes a plurality of pressure sensors arranged inside the front fender and the rear fender. The plurality of pressure sensors gather signals to the wireless signal transmitter on the back of the steel plate through the signal transmission line installed in the interlayer. The wireless signal transmitter transmits the signal to the calculator. The software algorithm built into the calculator analyzes the magnitude and distribution of the force, and adjusts the angle adjustment hydraulic rod and the position adjustment hydraulic rod according to the feedback, so that the force on the rubber is always within the design range requirements.

[0014] In the above scheme, winches are respectively installed on the decks of the T-shaped bow, the U-shaped stern and the middle hull, and the winches are connected to the longitudinal sliding shoes through cables.

[0015] Accordingly, the present invention also proposes a method for floating installation of an offshore structure, which is performed using the above-mentioned TU-type barge and includes the following steps:

[0016] Drive the TU-type barge into the dock, align the transverse rails on the middle hull deck with the transverse rails of the dock, move the transverse slide shoes to the transverse rails of the dock, and then hoist the marine structure module to be installed onto the module support component on the longitudinal slide shoes. Finally, move the transverse slide shoes to the transverse rails of the TU-type barge, and align the longitudinal slide shoes with the bow longitudinal slide rail / stern longitudinal slide rail to complete the loading of the marine structure module to be installed;

[0017] The installation position is selected according to the type of the marine structure module to be installed. If it is the bow position, the TU-type barge is driven by the dynamic positioning system to move until the T-shaped bow extends into the internal space of the platform; if it is the stern position, the TU-type barge is driven by the dynamic positioning system to move until the platform is located in the U-shaped groove of the U-shaped stern;

[0018] The winch at the bow or stern is used to pull the longitudinal sliding shoe to slide until the bottom plug-in of the offshore structure module to be installed is aligned with the pile leg coupling device of the platform at the installation station, and the load transfer is achieved by lowering the module separation hydraulic rod of the module support component, thereby completing the docking installation of the offshore structure module to be installed and the platform;

[0019] The entire platform installation process is completed by withdrawing the ship through the dynamic positioning system.

[0020] In the above method, the platform is a floating platform or a fixed platform; for a floating platform, after the TU-type barge travels to the installation station, the pile holding device is adjusted to an unfolded state, thereby holding the floating platform tightly so that the TU-type barge and the floating platform are combined into a whole, and after the marine structure module to be installed is docked and installed, the pile holding device is adjusted to a folded state; for a fixed platform, the pile holding device is always in a folded state.

[0021] The beneficial effects produced by the present invention are:

[0022] 1. Suitable for installation on a variety of marine structures with high economic benefits.

[0023] The barge of the present invention adopts a TU-shaped hull, the outer side of the T-shaped bow forms a bow station, and the inner side of the U-shaped stern forms a stern station. For large platforms, the bow station can be used for installation; for small platforms, the stern station can be used for installation. Therefore, the barge of the present invention can be applied to the installation of tension leg platforms, single-column platforms, large and small jackets and semi-submersible platforms, solving the problem of limited application range of monohull and catamaran floating installation.

[0024] 2. Bear greater environmental loads and increase the construction window period.

[0025] The TU-type hull of the present invention is a box-type structure, which is less affected by wave loads. For floating platforms, the pile-holding device can integrate the platform with the barge, greatly reducing the response amplitude between multiple floating bodies under environmental loads. It can carry a larger environmental load and increase the construction window period while ensuring safe operation. For fixed platforms, the construction position can be adjusted through the dynamic positioning system, and the pile-holding device plays an auxiliary role.

[0026] 3. Simplify the installation process and improve installation efficiency.

[0027] The dynamic positioning system can quickly adjust the position of the barge to move it to the installation position. The pile holding device can integrate the platform and the barge into one. The cooperation of the slide rail device and the module support device can realize the rapid transfer of the marine structure module to be installed from the dock to the middle hull deck and from the middle hull deck to the installation position. The height transfer load is then adjusted by the module separation hydraulic rod of the module support component. After the load is completely transferred, the pile holding device is retracted and the ship is withdrawn through the dynamic positioning system. Compared with the traditional installation process, the entire installation process of the present invention is very simple and greatly reduces the construction time.

[0028] 4. Multiple systems are coupled with each other, making it more intelligent, efficient and accurate.

[0029] The present invention includes a dynamic positioning system, a hydraulic system, a pile holding system, and a pressure monitoring system, wherein the hydraulic system includes a hydraulic rod in the pile holding system and a hydraulic rod in a block support device, all systems are controlled by a computer, and the various systems are coupled and influenced by each other. According to the software algorithm, the response amplitude of the system is always kept within a safe value range during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a top view of the overall structure of the TU-type barge of the present invention;

[0032] Figure 2 is a schematic diagram of the overall structure of the slide rail device and the block support device in an embodiment of the present invention;

[0033] Figure 3 yes Figure 2 An enlarged view of the partial structure of the slide rail device and the block support device shown;

[0034] Figure 4 is a schematic cross-sectional view of the slide rail and the slide shoe;

[0035] Figure 5 This is a schematic diagram of the pile holding device of the TU-type barge of the present invention in the unfolded state (the rear end fender is hidden to facilitate observation of the internal structure);

[0036] Figure 6 It is a schematic diagram of the pile holding device of the TU type barge of the present invention in the folded state;

[0037] Figure 7It is a structural schematic diagram of the front end fender and the rear end fender of the TU type barge of the present invention;

[0038] Figure 8 It is a schematic diagram of loading the marine structure module to be installed;

[0039] Fig. 9 It is a schematic diagram of the installation of the tension leg platform;

[0040] Fig.10 This is a schematic diagram of the installation of a single-column platform;

[0041] Fig.11 This is a schematic diagram of the installation of a large-scale jacket platform;

[0042] Fig.12 This is the front view of the installation of a large-scale jacket platform;

[0043] Fig.13 This is a schematic diagram of the installation of a small conductor rack platform.

[0044] In the picture: 100, TU type barge;

[0045] 1. TU-type hull; 11. T-type bow; 12. U-type stern; 13. Mid-hull;

[0046] 2. Slide rail device; 21. Horizontal slide rail; 22. Middle longitudinal slide rail; 23. Head longitudinal slide rail; 24. Tail longitudinal slide rail;

[0047] 3. Block support device; 31. Horizontal sliding shoe; 32. Longitudinal sliding shoe; 33. Fixed guide base; 34. Block support component; 341. Block separation hydraulic rod;

[0048] 4. Pile holding device; 41. Side rail; 411. Rear slider; 412. Front slider; 42. Angle adjustment hydraulic rod; 43. Position adjustment hydraulic rod; 44. Hydraulic rod base; 451. Front hinge rod; 452. Rear hinge rod; 461. Front fender; 462. Rear fender; 471. Steel plate; 472. Rubber; 473. Fixing knot; 474. Support truss; 481. Pressure sensor; 482. Wireless signal transmitter; 483. Signal transmission line; 491. Short bearing; 492. Front long bearing; 493. Rear long bearing;

[0049] 5. Dynamic positioning system; 51. Bow propulsion device; 52. Stern propulsion device; 53. Stern side propulsion device; 54. Midship side propulsion device;

[0050] 6. Fenders;

[0051] 200. Offshore structure assembly to be installed; 201. Tension leg platform; 202. Single column platform; 203. Large jacket platform; 204. Small jacket platform; 205. Dock; 206. Tensioning cable; 207. Load-bearing truss; 208. Plug-in; 209. Pile-leg coupling device. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] It should be noted that the illustrations provided in the embodiments of the present invention are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout type may also be more complicated.

[0054] In the present invention, it is also necessary to explain that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first" and "second" appear, they are only used for description and distinction purposes, and cannot be understood as indicating or implying relative importance.

[0055] like Figure 1 As shown, a TU-type barge 100 includes a TU-type hull 1, and a slide rail device 2, a block supporting device 3, a pile holding device 4, and a dynamic positioning system 5 installed on the TU-type hull 1.

[0056] The TU-shaped hull 1 is a box-shaped structure, including a T-shaped bow 11, a U-shaped stern 12 and a middle hull 13; the width of the T-shaped bow 11 is smaller than the middle hull 13, and the width of the U-shaped stern 12 is equal to the middle hull 13. The outer side of the T-shaped bow 11 forms a bow station, and the inner side of the U-shaped stern 12 forms a stern station.

[0057] like Figure 2-3 As shown, the slide rail device 2 includes a transverse slide rail 21 and a middle longitudinal slide rail 22 arranged on the deck of the middle hull 13, a bow longitudinal slide rail 23 arranged on the deck of the T-shaped bow 11, and a rear longitudinal slide rail 24 arranged on the deck of the U-shaped stern 12, and the bow longitudinal slide rail 23 / rear longitudinal slide rail 24 are coaxially arranged with the middle longitudinal slide rail 22.

[0058] The block supporting device 3 includes a transverse sliding shoe 31 slidably mounted above the transverse sliding rail 21 and a longitudinal sliding shoe 32 slidably mounted above the transverse sliding shoe 31. The marine structure block 200 to be installed is located on the longitudinal sliding shoe 32. Figure 4 As shown, the overall thickness of the transverse sliding shoe 31 after being assembled with the transverse sliding rail 21 is equal to the thickness of the middle longitudinal sliding rail 22 / the bow longitudinal sliding rail 23 / the tail longitudinal sliding rail 24. The TU-type barge 100 first transfers the marine structure assembly 200 to be installed from the dock 205 to the barge deck through the transverse sliding shoe 31. The shape of the longitudinal sliding shoe 32 is adapted to the bow longitudinal sliding rail 23 / the tail longitudinal sliding rail 24. When the transverse sliding shoe 31 moves to the point where the longitudinal sliding shoe 32 is coaxial with the bow longitudinal sliding rail 23 / the tail longitudinal sliding rail 24, the transverse sliding shoe 31 is fixed, and the longitudinal sliding shoe 32 can move to the bow longitudinal sliding rail 23 / the tail longitudinal sliding rail 24 under the action of external force, thereby transferring the marine structure assembly 200 to be installed to the bow station / the tail station.

[0059] The pile holding device 4 is installed on the outer side of the T-shaped bow 11 and the inner side of the U-shaped stern 12. The pile holding device 4 can be switched between an unfolded state and a folded state. In the unfolded state, it is used for the floating platform column, and in the folded state, it acts as a fender.

[0060] The dynamic positioning system 5 includes a bow propulsion device 51, a stern propulsion device 52, a stern side propulsion device 53, and a midship side propulsion device 54, and is arranged symmetrically about the longitudinal center axis of the hull. The bow propulsion device 51 and the stern propulsion device 52 can be used to adjust the longitudinal swing of the barge, and the stern side propulsion device 53 and the midship side propulsion device 54 can be used to adjust the sway and pitch of the barge. The propulsion devices at each position are independently controlled, which can realize the automatic adjustment of the barge position and ensure that the barge reaches the installation position smoothly.

[0061] Further optimized, the transverse slide rail 21 is a transverse concave slide rail, the middle longitudinal slide rail 22 is a longitudinal square slide rail, the head longitudinal slide rail 23 is a head longitudinal concave slide rail, and the tail longitudinal slide rail 24 is a tail longitudinal concave slide rail. Matchingly, the transverse slide shoe 31 is a transverse convex slide shoe, and the longitudinal slide shoe 32 is a longitudinal convex slide shoe.

[0062] Further optimization, a fixed guide base 33 is fixedly installed on the transverse sliding shoe 31, and a groove for the longitudinal sliding shoe 32 is provided on the fixed guide base 33. When the marine structure assembly 200 to be installed is transferred from the dock 205 to the hull, the fixed guide base 33 plays a fixing role for the longitudinal sliding shoe 32; when the marine structure assembly 200 to be installed is transferred from the middle hull 13 to the installation station, the fixed guide base 33 plays a guiding role for the longitudinal sliding shoe 32, ensuring that the longitudinal sliding shoe 32 successfully enters the groove of the bow longitudinal slide rail 23 / the tail longitudinal slide rail 24 to reach the coupling state. In the process of longitudinally transferring the upper assembly, the middle longitudinal slide rail 22 plays a supporting role to prevent the longitudinal sliding shoe 32 from bending vertically and thus destroying the overall structure, and is tied when longitudinally transferred to the installation station.

[0063] Further optimization, a block support component 34 is installed on the longitudinal sliding shoe 32, and the block support component 34 is a tapered steel truss structure. A block separation hydraulic rod 341 is provided in the middle of the block support component 34, and a load-bearing truss 207 is provided at the bottom of the marine structure block 200 to be installed to dock with the block separation hydraulic rod 341. The block separation hydraulic rod 341 can adjust the vertical position of the marine structure block 200 to be installed. The weight transfer of the marine structure block 200 to be installed is achieved by lowering the block separation hydraulic rod 341. When the weight transfer reaches 100%, the block separation hydraulic rod 341 is separated from the load-bearing truss 207.

[0064] In this embodiment, three transverse slide rails 21 and eight middle longitudinal slide rails 22 are evenly distributed on the deck of the middle hull 13, two bow longitudinal slide rails 23 lead to the T-shaped bow 11 and are coaxially arranged with the two middle longitudinal slide rails 22, and two stern longitudinal slide rails 24 lead to the U-shaped stern 12 and are coaxially arranged with the two middle longitudinal slide rails 22. Three transverse slide shoes 31 are correspondingly assembled and connected with the three transverse slide rails 21, and four longitudinal slide shoes 32 are installed on the three transverse slide shoes 31, and each longitudinal slide shoe 32 is installed with three block separation hydraulic rods 341 along the length direction of the ship.

[0065] like Figure 5-7As shown, the pile holding device 4 includes a side rail 41, an angle adjustment hydraulic rod 42, a position adjustment hydraulic rod 43, a hydraulic rod base 44, a front end hinged rod 451, a rear end hinged rod 452, a front end fender 461, and a rear end fender 462. The side rail 41 is arranged along the length of the ship and fixed to the side. The rear end of the angle adjustment hydraulic rod 42 is connected to the rear end slider 411 on the side rail 41 through the rear end long bearing 493, and the front end of the angle adjustment hydraulic rod 42 is connected to the front end slider 412 on the side rail 41 through the front end long bearing 492. The front end of the position adjustment hydraulic rod 43 is connected to the rear end long bearing 493, and the rear end of the position adjustment hydraulic rod 43 is connected to the hydraulic rod base 44, and the hydraulic rod base 44 is fixedly installed on the side. The front end of the front hinge rod 451 is hinged to the front long bearing 492, and the rear end is hinged to the short bearing 491; the front end of the rear hinge rod 452 is hinged to the short bearing 491, and the rear end is hinged to the rear long bearing 493. The front fender 461 is installed on the outer side of the front hinge rod 451, and the rear fender 462 is installed on the outer side of the rear hinge rod 452. The angle between the front fender 461 / rear fender 462 and the side of the barge is adjusted by adjusting the length of the angle adjustment hydraulic rod 42. The position of the front fender 461 / rear fender 462 is adjusted by adjusting the length of the position adjustment hydraulic rod 43 to adjust the pressure between the front fender 461 / rear fender 462 and the platform, and can adapt to platforms of different shapes and sizes.

[0066] Further optimization, the front fender 461 and the rear fender 462 have the same structure, both including a steel plate 471, a rubber 472 installed on the surface of the steel plate 471, a fixing knot 473 and a supporting truss 474 installed on the back of the steel plate 471. The fixing knot 473 is used to connect the steel plate 471 with the front hinge rod 451 / the rear hinge rod 452. The main function of the supporting truss 474 is to protect the internal structure of the pile-wrapping device when the barge enters the installation station and withdraws from the ship. When the front fender 461 and the rear fender 462 collide or squeeze with the external structure, the supporting truss 474 and the fixing knot 473 first transfer the pressure to the ship's side to avoid damage to the pile-wrapping device 4 structure.

[0067] For further optimization, the pile holding device 4 also includes a plurality of pressure sensors 481 arranged inside the front fender 461 and the rear fender 462. The plurality of pressure sensors 481 are installed in the interlayer between the rubber 472 and the steel plate 471, and can monitor the pressure and shear force exerted on the rubber 472. The plurality of pressure sensors 481 gather the signals to the wireless signal transmitter 482 on the back of the steel plate 471 through the signal transmission line 483 installed in the interlayer. The wireless signal transmitter 482 transmits the signals to the calculator, and then the pressure size and distribution are analyzed through the built-in software algorithm of the calculator, and the angle adjustment hydraulic rod 42 and the position adjustment hydraulic rod 43 are adjusted according to the feedback, so that the force exerted on the rubber 472 is always within the design range requirements.

[0068] Further optimization, the side slide rail 41 is a C-shaped slide rail, the rear end slider 411 and the front end slider 412 are both T-shaped sliders, the T-shaped slider slides in the C-shaped slide rail and the lubricating oil is transported through the oil pipe, and the pressurized lubricating oil is evenly sprayed through the small holes on the surface of the T-shaped slider. Compared with the rolling track system, it has a larger bearing capacity and is suitable for ultra-large floating installations, which is easy to maintain and use.

[0069] For further optimization, winches (not shown) are respectively installed on the decks of the T-shaped bow 11 and the U-shaped stern 12, and the winches are connected to the longitudinal sliding shoes 32 through cables.

[0070] For further optimization, fenders 6 are installed on the outer side of the T-shaped bow 11 and the inner side of the U-shaped stern 12.

[0071] Accordingly, the present invention also proposes a method for floating installation of an offshore structure, which is performed using the above-mentioned TU-type barge 100 and includes the following steps:

[0072] like Figure 8 As shown, the TU-type barge 100 is driven into the dock 205, and the transverse slide rail 21 on the deck of the middle hull 13 is aligned with the transverse slide rail 21 of the dock 205, and the transverse slide shoe 31 is moved to the transverse slide rail 21 of the dock 205, and then the marine structure module 200 to be installed is hoisted onto the module support component 34 on the longitudinal slide shoe 32, and finally the transverse slide shoe 31 is moved to the transverse slide rail 21 of the TU-type barge 100, and the longitudinal slide shoe 32 is aligned with the bow longitudinal slide rail 23 / the rear longitudinal slide rail 24, and the loading of the marine structure module 200 to be installed is completed.

[0073] The installation position is selected according to the type of the marine structure module 200 to be installed. If it is the bow position, the TU-type barge 100 is driven by the dynamic positioning system 5 to move until the T-shaped bow 11 extends into the internal space of the platform; if it is the stern position, the TU-type barge 100 is driven by the dynamic positioning system 5 to move until the platform is located in the U-shaped groove of the U-shaped stern 12. For large platforms, such as Fig. 9 The tension leg platform 201 shown (connected to the sea floor via tensioned cables) and Fig.11 The large jacket platform 203 (fixed on the seabed) shown in FIG. 1 is installed using the head station; for small platforms, such as Fig.10 The single column platform 202 shown and Fig.13 The small-sized jacket platform 204 shown is installed using a tail station.

[0074] The winch at the bow or stern pulls the longitudinal sliding shoe 32 to slide until the bottom plug-in 208 of the marine structure assembly 200 to be installed is aligned with the pile leg coupling device 209 of the platform at the installation station, and the vertical position of the marine structure assembly 200 to be installed is adjusted by the assembly separation hydraulic rod 341 to achieve load transfer until the weight transfer reaches 100%, thereby completing the docking installation of the marine structure assembly 200 to be installed and the platform. After that, the ship is withdrawn through the dynamic positioning system 5, and the entire platform installation process is completed.

[0075] The above-mentioned platform can be a floating platform or a fixed platform. For a floating platform (such as a tension leg platform 201, a single column platform 202, a semi-submersible platform, etc.), after the TU-type barge 100 travels to the installation station, the angle adjustment hydraulic rod 42 is retracted to reduce the angle between the front fender 461 / rear fender 462 and the ship's side from 180° to 90° or an acute angle, the pile holding device 4 is adjusted to the unfolded state, and the position of the front fender 461 / rear fender 462 is adjusted by the position adjustment hydraulic rod 43 so that the front fender 461 / rear fender 462 holds the column of the floating platform tightly, and then the angle and pressure are continuously adjusted through the feedback of the pressure detection system so that the TU-type barge 100 and the floating platform are combined into a whole, and the degree of freedom response amplitude between the two is basically zero. It should be noted that before the pile holding device 4 is deployed, the position of the barge is adjusted by the dynamic positioning system 5 to resist environmental loads to prevent a violent collision between the floating platform and the barge. After the marine structure module 200 to be installed is docked and installed, the position adjustment hydraulic rod 43 is retracted and the angle adjustment hydraulic rod 42 is extended to adjust the pile holding device 4 to a folded state. For fixed platforms (such as large jacket platform 203, small jacket platform 204, etc.), if the barge and the fixed platform are integrated into one, under environmental loads, the connection between the pile holding device 4 and the platform is likely to be damaged due to excessive stress. Therefore, the pile holding device 4 is always in a folded state, wherein the pile holding device 4 located at the transition between the middle hull 13 and the T-shaped bow 11 is adjusted to a state where the front end articulated rod 451 is perpendicular to the ship's side (see Figure 1 ) to match the shape of the fixed platform, and other pile holding devices 4 act as fenders during the installation process; the position of the barge is mainly adjusted by the dynamic positioning system 5 to avoid severe collision with the barge.

[0076] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0077] The order of execution of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0078] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for floating installation of an offshore structure, characterized in that: The TU-type barge is used, and the TU-type barge includes a TU-type hull, a slide rail device, a block support device, a pile holding device and a dynamic positioning system; The TU-shaped hull includes a T-shaped bow, a U-shaped stern and a mid-hull; the outer side of the T-shaped bow forms a bow workstation, and the inner side of the U-shaped stern forms a stern workstation; The slide rail device includes a transverse slide rail and a middle longitudinal slide rail arranged on the middle hull deck, a bow longitudinal slide rail arranged on the T-shaped bow deck, and a stern longitudinal slide rail arranged on the U-shaped stern deck; The block supporting device comprises a transverse sliding shoe slidably mounted above the transverse sliding rail, and a longitudinal sliding shoe slidably mounted above the transverse sliding shoe, and the marine structure block to be installed is located on the longitudinal sliding shoe; the overall thickness of the transverse sliding shoe after assembly with the transverse sliding rail is equal to the thickness of the middle longitudinal sliding rail / the front longitudinal sliding rail / the rear longitudinal sliding rail; the shape of the longitudinal sliding shoe is adapted to the front longitudinal sliding rail / the rear longitudinal sliding rail, and when the transverse sliding shoe moves until the longitudinal sliding shoe is coaxial with the front longitudinal sliding rail / the rear longitudinal sliding rail, the longitudinal sliding shoe can move to the front longitudinal sliding rail / the rear longitudinal sliding rail, thereby transferring the marine structure block to be installed to the front station / the rear station; The pile holding device is installed on the outer side of the T-shaped bow and the inner side of the U-shaped stern. The pile holding device can be switched between an unfolded state and a folded state. In the unfolded state, it is used to hold the floating platform column tightly, and in the folded state, it acts as a fender. The dynamic positioning system includes a bow propulsion device, a stern propulsion device, a stern side propulsion device, and a midship side propulsion device, and is symmetrically arranged about the longitudinal centerline of the hull. The propulsion devices at each position are independently controlled, and can realize automatic adjustment of the barge position; The offshore structure floating installation method comprises the following steps: Drive the TU-type barge into the dock, align the transverse rails on the middle hull deck with the transverse rails of the dock, move the transverse slide shoes to the transverse rails of the dock, and then hoist the marine structure module to be installed onto the module support component on the longitudinal slide shoes. Finally, move the transverse slide shoes to the transverse rails of the TU-type barge, and align the longitudinal slide shoes with the bow longitudinal slide rail / stern longitudinal slide rail to complete the loading of the marine structure module to be installed; The installation position is selected according to the type of the marine structure module to be installed. If it is the bow position, the TU-type barge is driven by the dynamic positioning system to move until the T-shaped bow extends into the internal space of the platform; if it is the stern position, the TU-type barge is driven by the dynamic positioning system to move until the platform is located in the U-shaped groove of the U-shaped stern; The winch at the bow or stern is used to pull the longitudinal sliding shoe to slide until the bottom plug-in of the offshore structure module to be installed is aligned with the pile leg coupling device of the platform at the installation station, and the load transfer is achieved by lowering the module separation hydraulic rod of the module support component, thereby completing the docking installation of the offshore structure module to be installed and the platform; The whole platform installation process is completed by withdrawing the ship through the dynamic positioning system; The platform is a floating platform or a fixed platform; for a floating platform, after the TU-type barge travels to the installation station, the pile holding device is adjusted to an unfolded state, thereby holding the floating platform tightly so that the TU-type barge and the floating platform are combined into a whole; after the marine structure module to be installed is docked and installed, the pile holding device is adjusted to a folded state; for a fixed platform, the pile holding device is always in a folded state.

2. The method for floating installation of an offshore structure according to claim 1, characterized in that: The transverse slide rail is a transverse concave slide rail, the middle longitudinal slide rail is a longitudinal square slide rail, the head longitudinal slide rail is a head longitudinal concave slide rail, and the tail longitudinal slide rail is a tail longitudinal concave slide rail; the transverse sliding shoe is a transverse convex sliding shoe, and the longitudinal sliding shoe is a longitudinal convex sliding shoe.

3. The method for floating installation of an offshore structure according to claim 1, characterized in that: A fixed guide base is installed on the transverse sliding shoe, and a longitudinal sliding shoe penetration groove is provided on the fixed guide base.

4. The method for floating installation of an offshore structure according to claim 1, characterized in that: A block support component is installed on the longitudinal sliding shoe, and a block separation hydraulic rod is provided in the middle of the block support component. The marine structure block to be installed is connected to the block separation hydraulic rod through the load-bearing truss at the bottom. The weight transfer of the marine structure block to be installed is achieved by lowering the block separation hydraulic rod. When the weight transfer reaches 100%, the block separation hydraulic rod is separated from the load-bearing truss.

5. The method for floating installation of an offshore structure according to claim 1, characterized in that: The pile holding device includes a side slide rail, an angle adjustment hydraulic rod, a position adjustment hydraulic rod, a hydraulic rod base, a front end hinged rod, a rear end hinged rod, a front end fender, and a rear end fender; the side slide rail is arranged along the length of the ship and fixed to the side; the rear end and the front end of the angle adjustment hydraulic rod are respectively connected to the rear end slider and the front end slider on the side slide rail through the rear end long bearing and the front end long bearing; the front end of the position adjustment hydraulic rod is connected to the rear end long bearing, and the rear end is connected to the hydraulic rod base, and the hydraulic rod base is fixedly installed on the side; the front end of the front end hinged rod is hinged to the front end long bearing, and the rear end is hinged to the short bearing; the front end of the rear end hinged rod is hinged to the short bearing, and the rear end is hinged to the rear end long bearing; the front end fender is installed on the outer side of the front end hinged rod, and the rear end fender is installed on the outer side of the rear end hinged rod.

6. The method for floating installation of an offshore structure according to claim 5, characterized in that: The front fender has the same structure as the rear fender, and both include a steel plate, a rubber installed on the surface of the steel plate, a fixing knot installed on the back of the steel plate, and a supporting truss, wherein the fixing knot is used to connect the steel plate and the front hinge rod / rear hinge rod.

7. The method for floating installation of an offshore structure according to claim 6, characterized in that: The pile holding device also includes a plurality of pressure sensors arranged inside the front fender and the rear fender. The plurality of pressure sensors gather signals to a wireless signal transmitter on the back of the steel plate through a signal transmission line installed in the interlayer. The wireless signal transmitter transmits the signal to a calculator. The magnitude and distribution of the force are analyzed by a software algorithm built into the calculator, and the angle adjustment hydraulic rod and the position adjustment hydraulic rod are adjusted according to the feedback, so that the force on the rubber is always within the design range requirements.

8. The method for floating installation of an offshore structure according to claim 1, characterized in that: Winches are respectively installed on the decks of the T-shaped bow, the U-shaped stern and the middle hull, and the winches are connected to the longitudinal sliding shoes through cables.

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