Jacket foundation and construction method thereof

Abstract

The present application relates to the technical field of jackets and discloses a jacket foundation and a construction method thereof. The jacket foundation comprises a foundation structure including foundation piles, a connecting seat, and a first lifting lug, wherein the number of the foundation piles is two or more, the connecting seat is connected between each two adjacent foundation piles, the first lifting lug is connected to the connecting seat, and the foundation pile has a socket cavity with an upward opening; a truss structure including a support truss, a plug-in seat, and a second lifting lug, the second lifting lug being connected to the support truss, the plug-in seat being disposed at the bottom of the support truss and corresponding to the foundation piles. When the plug-in seat is plugged into the foundation pile, the outer wall of the plug-in seat and the inner wall of the foundation pile enclose a grouting cavity, thereby grouting the plug-in seat to the corresponding foundation pile. The present application can reduce the requirements for the lifting capacity of a crane vessel during jacket foundation installation.

Description

Technical Field

[0001] This application relates to the technical field of jackets, in particular to a jacket foundation and its construction method. Background Art

[0002] A jacket foundation is a type of foundation used to install offshore wind turbines. It typically consists of foundation piles anchored to the seabed and a supporting truss connected to the piles. The top of the supporting truss is exposed above sea level for the installation of the wind turbine. Currently, jacket foundations are often fabricated on the seabed. A crane vessel then hoists the jacket to the seabed, securing the piles to the seabed. However, to accommodate the depth of the sea, jacket foundations are tall and heavy. This height, especially for jacket foundations in deep waters, requires a high crane vessel's lifting capacity, increasing installation costs. Summary of the Invention

[0003] In order to reduce the requirements on the lifting capacity of a crane vessel during the installation of a jacket foundation, the present application provides a jacket foundation and a construction method thereof.

[0004] In a first aspect, the present application provides a jacket foundation, which adopts the following technical solution:

[0005] A jacket foundation, comprising:

[0006] A foundation structure comprising foundation piles, a connecting seat, and a first lifting lug, wherein the number of the foundation piles is two or more, the connecting seat is connected between each two adjacent foundation piles, the first lifting lug is connected to the connecting seat, and the foundation pile has a socket cavity with an upward opening;

[0007] A truss structure includes a supporting truss, a socket, and a second lifting lug, wherein the second lifting lug is connected to the supporting truss, the socket is provided at the bottom of the supporting truss, and the sockets correspond to the foundation piles one by one, so that the sockets are plugged into the socket cavity corresponding to the foundation pile;

[0008] Wherein, when the socket is plugged into the foundation pile, the outer wall of the socket and the inner wall of the foundation pile enclose a grouting cavity, so that the socket is connected to the corresponding foundation pile by grouting.

[0009] By adopting the above technical solution, during installation in the sea, the foundation structure and the truss structure are spliced ​​together to form a complete jacket foundation. When the jacket foundation is hoisted by a crane vessel, the crane vessel can separately hoist the foundation structure and the truss structure by cooperating with the first lifting lug and the second lifting lug, thereby reducing the height and weight of the crane vessel during a single hoisting operation, and reducing the requirements for the crane vessel's hoisting capacity during the installation of the jacket foundation.

[0010] Optionally, the socket is hollow inside, and has a grouting pipeline extending into the grouting cavity.

[0011] By adopting the above technical solution, the grouting pipeline is arranged in the socket, so that when the socket is matched with the foundation pile, the grouting pipeline is not easy to interfere with the foundation pile, so that the grouting pipeline can be smoothly extended into the grouting cavity.

[0012] Optionally, an abutment seat is provided at one end of the plug-in seat close to the supporting truss. When the plug-in seat moves in the foundation pile and the abutment seat abuts against the foundation pile, the abutment seat closes the sleeve cavity.

[0013] By adopting the above technical solution, the cooperation between the abutment seat and the foundation pile can limit the position of the plug-in seat, and at the same time prevent the grouting material in the grouting cavity from flowing out too much and causing waste.

[0014] Optionally, a shear key is enclosed on the outer wall of the socket.

[0015] By adopting the above technical solution, the shear key can increase the contact area between the grouting material and the socket, and make the socket less likely to move after being connected to the foundation pile.

[0016] Optionally, the socket is cylindrical and has a plurality of guide seats distributed along the circumference of the socket. The guide seat has an inclined surface, which is inclined upward in the direction close to the supporting truss to guide the socket during the connection between the socket and the foundation pile, so that the socket and the foundation pile are coaxially arranged.

[0017] By adopting the above technical solution, the inclined surface on the guide seat is used to guide the socket, so that the relative position between itself and the foundation pile is adjusted when the socket is inserted into the foundation pile, so that the socket and the foundation pile are coaxially arranged, thereby making the thickness of the grouting material in the grouting cavity uniform, and improving the connection effect between the socket and the foundation pile.

[0018] Optionally, two collars are sleeved on the outer wall of the socket, and the two collars are distributed along the axial direction of the socket, and the guide seat includes:

[0019] a tilting rod hinged to the outer wall of the collar;

[0020] a hinged rod hinged to an end of the tilting rod away from the collar;

[0021] a connecting hook connected to an end of the hinged rod away from the tilting rod;

[0022] The socket has a locking assembly for locking the connecting hook. When the connecting hook is locked by the locking assembly, the connecting hook abuts against the outer wall of the collar and is positioned. The guide seats on the two collars are mirror-symmetrical, and the guide seats guide the movement of the socket.

[0023] The foundation pile is provided with a magnetic member on the inner wall of the sleeve cavity, and the foundation pile has an unlocking member in the sleeve cavity, the unlocking member is used to release the locking component from locking the connecting hook, so that the connecting hook is attracted by the magnetic member and abuts against the inner wall of the sleeve cavity;

[0024] The foundation pile is provided with a handle corresponding to the connecting hook on the inner wall of the sleeve cavity, and the socket is provided with a pull rope that cooperates with the ring. When the pull rope is pulled toward the direction of the supporting truss, the two rings are driven to rotate and move toward each other, so that the connecting hook is hooked to the corresponding handle, and the inclined rod and the hinge rod in the same guide seat extend in the same straight line direction.

[0025] By adopting the above technical solution, the connecting hook is locked by the locking component, so that the guide seat can keep guiding the socket during the process of the socket being plugged into the foundation pile. After the connecting hook is unlocked by the unlocking member, the connecting hook abuts against the inside of the socket, and then the connecting hook is pulled to the corresponding handle by pulling the rope, so that the guide seat can be connected to the foundation pile and the socket, thereby improving the stability of the socket.

[0026] Optionally, the locking assembly includes:

[0027] A mounting box is connected to the inner wall of the socket, extends axially along the socket, and has a bottom that passes through the bottom of the socket and is open;

[0028] A movable seat, movable in the installation box along an axis perpendicular to the plug seat;

[0029] a positioning rod connected to the movable base and extending out of the installation box;

[0030] An elastic member is located in the installation box and cooperates with the movable seat to give the movable seat a tendency to move toward the outer wall of the socket;

[0031] The movable seats on the same vertical line are located in the same installation box. When the movable seats abut against the side of the installation box close to the outer wall of the socket, the positioning rod is simultaneously passed through the socket, the ring and the connecting hook.

[0032] The movable seat has a guide slope on a side away from the supporting truss, and the unlocking member includes a pressure rod provided on the foundation pile, the pressure rod is located in the sleeve cavity and corresponds to the installation box, and the top of the pressure rod has a pointed head;

[0033] When the socket gradually enters the sleeve cavity, the pointed head cooperates with the guiding inclined surface to move the movable seat away from the outer wall of the socket, so that the positioning rod is separated from the collar and the connecting hook.

[0034] By adopting the above technical solution, the movable seat is not affected by the pressure rod, and the elastic member drives the positioning rod to lock the connecting hook. When the pressure rod enters the installation box, the pressure rod unlocks the connecting hook through the cooperation between the pointed head and the guiding inclined surface of the movable seat. At the same time, the cooperation between the pressure rod and the movable seat guides the movement of the plug-in seat, so that the pressure rod can stabilize the plug-in seat while unlocking the connecting hook.

[0035] Optionally, the inner wall of the collar has a travel column extending into the socket, and the socket has a travel groove for the travel column to slide, and the travel groove extends obliquely along the circumference of the socket; the socket has a horizontal axis, and a rotating rod is hinged on the horizontal axis, and a first rope is connected between the travel column on one of the collars and one end of the rotating rod, and a second rope is connected between the travel column on the other collar and the pull rope, and the pull rope is connected to the end of the rotating rod away from the first rope.

[0036] By adopting the above technical solution, the inclined extension of the stroke groove enables the stroke column to move axially along the plug-in seat and rotate at the same time when it is pulled by the pull rope. Therefore, when the plug-in seat is plugged into the foundation pile, the guide seat and the relative handle are misaligned, and the pulling of the pull rope causes all the guide seats to be aligned with the relative handles at the same time, thereby improving the convenience of operation.

[0037] In a second aspect, the present application provides a construction method for a jacket foundation, which adopts the following technical solution:

[0038] A construction method for a jacket foundation comprises the following steps:

[0039] S1, transport the foundation structure and truss structure to the designated sea area respectively;

[0040] S2, using a crane vessel and the first lifting lug to lower the foundation structure to the seabed, and fixing the foundation structure to the seabed;

[0041] S3, using a crane vessel and the second lifting lug to lower the truss structure to the corresponding foundation structure, so that the socket is vertically inserted downward into the socket cavity of the corresponding foundation pile;

[0042] S4, fill the high-strength grouting material into the grouting cavity, and remove the sling after the grouting is completed.

[0043] In summary, this application has at least one of the following beneficial effects:

[0044] 1. By separating the foundation structure and truss structure before connecting them, the height and weight of a single lift by the crane vessel are reduced, thereby reducing the lifting capacity requirements of the crane vessel during jacket foundation installation and lowering installation costs.

[0045] 2. By guiding the guide seat with the inclined surface facing the plug-in seat, the plug-in seat and the foundation pile are arranged coaxially, thereby uniforming the thickness of the grouting material in the grouting cavity and improving the connection effect between the plug-in seat and the foundation pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a structural diagram of Example 1 of the present application;

[0047] Figure 2 This is a schematic diagram of the explosion structure of Example 1 of the present application;

[0048] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0049] Figure 4 is a perspective view of a grouting pipeline according to Example 1 of the present application;

[0050] Figure 5 This is a schematic diagram of the explosion structure of Example 2 of the present application;

[0051] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0052] Figure 7 This is a top view of the socket of the second embodiment of the present application;

[0053] Figure 8 is a cross-sectional view of the installation box of Example 2 of the present application;

[0054] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure at C in the middle;

[0055] Figure 10 This is a schematic diagram of the structure inside the connecting cylinder of the second embodiment of the present application;

[0056] Figure 11 is a cross-sectional view showing the lower structure of the socket in the second embodiment of the present application;

[0057] Figure 12 It is a cross-sectional view showing the upper structure of the socket in the second embodiment of the present application.

[0058] Explanation of reference numerals: 1. foundation structure; 101. foundation pile; 1011. suction cylinder; 1012. connecting cylinder; 102. connecting seat; 103. first lifting lug; 2. sleeve cavity; 3. truss structure; 31. supporting truss; 32. plug-in seat; 33. second lifting lug; 4. grouting pipeline; 5. abutment seat; 6. shear key; 7. guide seat; 71. tilt rod; 72. hinged rod; 73. connecting Hook; 8. Inclined surface; 9. Ring; 10. Handle; 11. Pull rope; 12. Mounting box; 13. Moving seat; 14. Positioning rod; 15. Elastic member; 16. Guide slope; 17. Pressure rod; 18. Pointed head; 19. Travel column; 20. Travel groove; 21. Horizontal axis; 22. Turning rod; 23. First rope; 24. Second rope; 25. Rib; 26. Fixed point; 27. Guide rod; 28. Through groove. DETAILED DESCRIPTION

[0059] The following is combined with Figure 1-12 This application is described in further detail.

[0060] Example 1:

[0061] The present application embodiment discloses a jacket foundation. Figure 1 The jacket foundation includes a foundation structure 1 and a truss structure 3.

[0062] Reference Figure 2 , wherein the foundation structure 1 includes a foundation pile 101, a connecting seat 102, and a first lifting lug 103. The foundation pile 101 includes a suction cylinder 1011 and a connecting cylinder 1012. The suction cylinder 1011 is an existing jacket suction cylinder 1011, which is used to be adsorbed to the seabed in the vertical direction to fix the foundation structure 1. The number of suction cylinders 1011 is two or more, and in this embodiment, there are three. The three suction cylinders 1011 are distributed along the corners of an equilateral triangle. The connecting cylinder 1012 corresponds to the suction cylinder 1011 one by one. The connecting cylinder 1012 is cylindrical and forms a sleeve cavity 2 with an upward opening. The connecting cylinder 1012 is coaxially fixed to the top of the suction cylinder 1011.

[0063] The connecting bases 102 are rod-shaped and consist of three connecting bases 102, each connected to the outer wall of two adjacent connecting tubes 1012. The length of each connecting base 102 is perpendicular to the axis of the connecting tubes 1012, forming a regular triangle with the connecting bases 102 and the connecting tubes 1012. A first lifting lug 103 is fixed to the top of each connecting base 102. Each connecting base 102 has two first lifting lugs 103, and the distance between each first lifting lug 103 and the adjacent connecting tube 1012 is equal. During installation, a crane vessel lifts the entire foundation structure 1 using the first lifting lugs 103 and lowers it into the sea for installation.

[0064] The truss structure 3 includes a support truss 31, a socket 32, and a second lifting lug 33. The support truss 31 is constructed from spliced ​​steel pipes and is used to mount and support offshore wind turbines. The second lifting lug 33 is mounted on top of the support truss 31 to engage with a crane vessel.

[0065] Reference Figure 3 and Figure 4 The sockets 32 are fixed to the bottom of the support truss 31, and the number and position of the sockets 32 correspond one-to-one with the connection tubes 1012. The sockets 32 are cylindrical and extend in the vertical direction. The outer diameter of the sockets 32 is smaller than the inner diameter of the connection tube 1012. The bottom of the sockets 32 is closed, and a plurality of ribs 25 are fixed to the bottom of the sockets 32. The ribs 25 are distributed along the circumference of the sockets 32, and the horizontal distance from the ribs 25 to the center axis of the sockets 32 gradually decreases in the downward direction, so as to break the current in the sea and make the truss structure 3 move more smoothly.

[0066] The socket 32 ​​houses a grouting line 4, which passes through the socket's wall and into the socket's exterior. Two grouting lines 4 are located one above the other, extending through the support truss 31 to a crane vessel at sea level for connection to grouting equipment. An abutment 5 is fixedly enclosed on the outer wall of one end of the socket 32, near the support truss 31. This abutment 5 is annular and coaxial with the socket 32, with an outer diameter greater than that of the connecting tube 1012.

[0067] Reference Figure 1 and Figure 2 When the truss structure 3 is installed, the crane lowers the truss structure 3 into the sea through the second lifting ear 33, so that the socket 32 ​​corresponds to the connecting tube 1012, and the socket 32 ​​is inserted into the corresponding connecting tube 1012 in the vertical direction downward until the abutment seat 5 abuts against the top of the connecting tube 1012. At this time, the abutment seat 5 closes the upper part of the sleeve cavity 2 of the connecting tube 1012, and the outer wall of the socket 32 ​​and the inner wall of the connecting tube 1012 enclose a grouting cavity. The high-strength grouting material is injected into the grouting cavity through the grouting pipeline 4, that is, the socket 32 ​​and the connecting tube 1012 can be connected by grouting, even if the foundation structure 1 and the truss structure 3 are relatively fixed.

[0068] In addition, in order to facilitate the observation of the grouting situation, an overflow port is opened on the side wall of the top of the connecting tube 1012. During grouting, seawater is squeezed out of the grouting material through the overflow port. When the grouting material flows out of the overflow port, it indicates that the grouting material has filled the grouting cavity.

[0069] Reference Figure 3Furthermore, in another embodiment, a plurality of shear keys 6 are enclosed on the outer wall of the socket 32. The shear keys 6 are in the shape of a ring and are coaxially arranged with the socket 32. The plurality of shear keys 6 are evenly spaced along the axial direction of the socket 32. When the connecting tube 1012 is mated with the socket 32, a gap is provided between the shear keys 6 and the inner wall of the connecting tube 1012, allowing grouting material to flow in the grouting cavity. The shear keys 6 also increase the contact area between the grouting material and the socket 32, thereby improving the stability of the socket 32.

[0070] The implementation principle of a jacket foundation in an embodiment of the present application is as follows: first, the foundation structure 1 is lowered to the seabed through the first lifting lug 103 for fixation, and then the truss structure 3 is lowered to the seabed through the second lifting lug 33 to cooperate with the foundation structure 1, so that the socket 32 ​​is plugged into the corresponding connecting tube 1012, and then high-strength grouting material is poured into the grouting cavity through the grouting pipeline 4 to connect the foundation structure 1 and the truss structure 3.

[0071] Example 2:

[0072] When the socket 32 ​​is plugged into the connecting tube 1012, since the outer diameter of the socket 32 ​​is smaller than the inner diameter of the connecting tube 1012, the socket 32 ​​is not easy to be coaxial with the connecting tube 1012, so that the distance from the inner wall of the connecting tube 1012 to the outer wall of the socket 32 ​​is different, resulting in different thicknesses of the grouting material along the circumference of the socket 32, which not only affects the connection effect between the socket 32 ​​and the connecting tube 1012, but also affects the support effect of the suction tube 1011 on the truss structure 3. Therefore, in order to solve the above problems, an embodiment of the present application provides a conductor frame foundation.

[0073] A jacket foundation, which is different from the first embodiment in that Figure 2 In the embodiment of the present application, the outer wall of the socket 32 ​​does not have a shear key 6, but has two rings 9. The two rings 9 are distributed axially along the socket 32, and the rings 9 are in the shape of a circular ring coaxially arranged with the socket 32. The outer diameter of the ring 9 is smaller than the inner diameter of the connecting tube 1012.

[0074] Reference Figure 6 Three guide seats 7 are connected to the outer wall of each collar 9. The guide seats 7 are evenly spaced along the circumference of the collar 9, and each guide seat 7 includes a tilting rod 71, a hinged rod 72, and a connecting hook 73. The tilting rod 71 is hinged to the outer wall of the collar 9, the hinged rod 72 is hinged to the end of the tilting rod 71 away from the collar 9, and the connecting hook 73 is fixed to the end of the hinged rod 72 away from the tilting rod 71. The hinged rod 72 on the upper collar 9 of the socket 32 ​​is located above the tilting rod 71, and the hinged rod 72 on the lower collar 9 of the socket 32 ​​is located below the tilting rod 71.

[0075] The socket 32 ​​has a locking assembly therein, which is used to position the connecting hook 73 so that the tilting rod 71 and the hinge rod 72 are positioned relative to each other.

[0076] When the locking assembly locks the connecting hook 73, the connecting hook 73 abuts against the outer wall of the collar 9, and the connecting hooks 73 on the same collar 9 are located on the same horizontal plane. At this time, the tilting rod 71, the hinged rod 72 and the outer wall of the collar 9 form a triangle. The hinge point where the tilting rod 71 and the hinged rod 72 are connected is the fixed point 26. The outer diameter of the circle formed by connecting all the fixed points 26 on the same collar 9 is consistent with the inner diameter of the connecting tube 1012, and at this time, the guide seats 7 on the two collars 9 are mirror-symmetrical along the horizontal center line between the two collars 9.

[0077] Reference Figure 5 and Figure 6 At the same time, when the locking assembly locks the connecting hook 73, the inclined rod 71 located on the ring 9 above the socket 32 ​​forms an inclined surface 8, and the inclined surface 8 is inclined along the direction away from the socket 32 ​​toward the support truss 31; the hinged rod 72 located on the ring 9 below the socket 32 ​​also forms an inclined surface 8, and the inclined surface 8 is inclined along the direction away from the socket 32 ​​toward the support truss 31.

[0078] Therefore, when the socket 32 ​​is plugged downward into the connecting tube 1012, when the inclined surface 8 abuts against the end face of the connecting tube 1012, the socket 32 ​​and the connecting tube 1012 are eccentric, and the guidance of the inclined surface 8 can make the socket 32 ​​offset to a position coaxial with the connecting tube 1012, so that when the abutting seat 5 abuts against the end face of the connecting tube 1012, the socket 32 ​​and the connecting tube 1012 are coaxially arranged.

[0079] The connecting cylinder 1012 has an unlocking member within the sleeve cavity 2 for releasing the locking assembly from locking the connecting hook 73. Furthermore, the connecting cylinder 1012 has a magnetic member embedded in the inner circumferential wall of the sleeve cavity 2. The magnetic member is a magnetic strip (not shown) embedded in the inner circumferential wall of the sleeve cavity 2. The magnetic strip corresponds to the position of the guide seat 7 and extends in the vertical direction. The inner surface of the magnetic strip and the inner wall of the connecting cylinder 1012 are on the same arc surface. In other embodiments, the magnetic member can also be a magnetic ring located within the wall of the connecting cylinder 1012. The connecting hook 73 is made of metal that can be attracted by the magnetic strip.

[0080] When the unlocking member releases the locking of the connecting hooks 73 , all the connecting hooks 73 are attracted by the magnetic strips and drive the hinge rod 72 to move toward the inner wall of the connecting tube 1012 , so that the connecting hooks 73 abut against the inner wall of the connecting tube 1012 .

[0081] Reference Figure 7 and Figure 8Specifically, the locking assembly includes a mounting box 12, a movable seat 13, a positioning rod 14, and an elastic member 15. Three mounting boxes 12 are fixed to the inner wall of the socket 32. The three mounting boxes 12 are evenly spaced along the circumference of the socket 32, and the positions of the three mounting boxes 12 correspond to the guide seats 7 on the collar 9. The mounting boxes 12 are hollow and extend axially along the socket 32. The bottom of the mounting boxes 12 passes through the bottom of the socket 32 ​​and is open, so that the interior of the mounting boxes 12 communicates with the exterior of the socket 32.

[0082] Reference Figure 7 and Figure 9 A guide rod 27 is fixed to the inner wall of the installation box 12 on the side away from the inner wall of the socket 32. The guide rod 27 is square and extends horizontally perpendicular to the axis of the socket 32 ​​toward the inner wall of the socket 32. The guide rod 27 is not connected to the inner wall of the installation box 12 on the side close to the socket 32. The movable seat 13 is slidably sleeved on the outer wall of the guide rod 27 along the length direction of the guide rod 27, so that the movable seat 13 moves within the installation box 12. There are two movable seats 13 in each installation box 12. The two movable seats 13 are distributed in the vertical direction and correspond to the two guide seats 7 on the two collars 9 that are located on the same vertical line.

[0083] The positioning rod 14 is L-shaped and corresponds one-to-one with the movable seat 13. The short side of the positioning rod 14 is positioned on the corresponding movable seat 13. The long side of the positioning rod 14 is located outside the installation box 12 and is parallel to the guide rod 27 of the corresponding movable seat 13. A through slot 28 is provided on the wall of the installation box 12 for the short side of the positioning rod 14 to pass through the installation box 12 and move together with the movable seat 13.

[0084] The elastic member 15 is located inside the mounting box 12 and corresponds one-to-one with the guide rod 27. It is a spring that is sleeved on the outer wall of the corresponding guide rod 27. The opposite ends of the spring are respectively connected to the inner wall of the mounting box 12 and the outer wall of the movable seat 13, and the elastic force of the spring gives the movable seat 13 a tendency to move toward the inner wall of the socket 32.

[0085] When the spring drives the movable seat 13 to abut against the inner wall of the installation box 12 on one side close to the inner wall of the socket 32, the long rod of the positioning rod 14 simultaneously passes through the socket 32, the ring 9 and the connecting hook 73 corresponding to the movable seat 13. The socket 32, the ring 9 and the connecting hook 73 have corresponding through holes, so that the positioning rod 14 locks the guide seat 7.

[0086] Reference Figure 9 and Figure 10Each movable seat 13 has a guide slope 16 on the side of its bottom near the inner wall of the socket 32. The guide slope 16 slopes away from the inner wall of the socket 32 ​​and away from the abutment seat 5. The unlocking member includes a pressure rod 17 positioned on the inner bottom wall of the connecting tube 1012 on the sleeve cavity 2. The pressure rod 17 is rectangular and long. The number and position of the pressure rods 17 correspond one-to-one with the installation box 12. The pressure rods 17 extend upward in the vertical direction, and the opening at the bottom of the installation box 12 is adapted to the shape of the pressure rods 17. The top of the pressure rod 17 has a pointed tip 18, the tip of which is located on the side of the pressure rod 17 near the inner wall of the sleeve cavity 2.

[0087] When the guide seat 7 located below the socket 32 ​​is completely inserted into the sleeve cavity 2 in a locked state, the pressure rod 17 is inserted into the corresponding installation box 12 along the vertical direction. As the socket 32 ​​gradually moves downward, the pressure rod 17 cooperates with the movable seat 13 one by one from bottom to top.

[0088] Specifically, the tip 18 of the pressure rod 17 first enters the space between the guide bevel 16 and the inner wall of the mounting box 12, engaging with the guide bevel 16. It then gradually presses the movable seat 13 toward the spring, causing the movable seat 13 to move the positioning rod 14 toward the spring and compress the spring. When the tip 18 of the pressure rod 17 completely passes the movable seat 13, the guide rod 27 no longer interferes with the pressure rod 17, and the long side of the positioning rod 14 disengages from the collar 9 and the connecting hook 73, thereby releasing the locking force of the positioning rod 14 on the collar 9 and the connecting hook 73, allowing the connecting hook 73 to be magnetically attracted and move toward the inner wall of the socket 32.

[0089] Reference Figure 11 Three stroke columns 19 are fixed on the inner wall of each collar 9. The three stroke columns 19 pass through the wall of the socket 32 ​​in the horizontal direction and enter the socket 32. The three stroke columns 19 are evenly spaced along the circumference of the collar 9. A stroke groove 20 corresponding to the stroke column 19 is opened on the wall of the socket 32. The stroke column 19 enters the connecting seat 102 through the stroke groove 20, and the stroke groove 20 extends obliquely along the circumferential direction of the socket 32 ​​away from the abutment seat 5, so that when the stroke column 19 moves in the stroke groove 20, it can drive the collar 9 to rotate while moving axially along the socket 32.

[0090] Reference Figure 10 and Figure 11 The connecting tube 1012 has a handle 10 fixed to the inner wall of the sleeve cavity 2. The handle 10 is a U-shaped structure with its opening facing the inner wall of the connecting tube 1012, and the handle 10 corresponds to the guide seat 7. When the socket 32 ​​and the connecting tube 1012 are plugged into each other, the handle 10 and the guide seat 7 are always located on different vertical lines, so that the socket 32 ​​will not be interfered with by the handle 10 during its downward movement.

[0091] When the guide seat 7 is in the locked state, the travel column 19 of the upper collar 9 of the plug seat 32 abuts against the upper inner wall of the corresponding travel groove 20, and the travel column 19 of the lower collar 9 of the plug seat 32 abuts against the lower inner wall of the corresponding travel groove 20. The cooperation between the positioning rod 14 and the guide seat 7 limits the displacement of the collar 9 relative to the plug seat 32.

[0092] When all the guide seats 7 are in the unlocked state and the abutment seat 5 is in abutment with the connecting tube 1012, all the handles 10 are located between the connecting hooks 73 on the upper and lower rings 9. Moving the two rings 9 toward each other can drive the rings 9 to rotate until the connecting hooks 73 and the corresponding handles 10 are on the same vertical line, and the connecting hooks 73 are hooked onto the handles 10.

[0093] Reference Figure 12 To move the two collars 9 toward each other, a horizontal shaft 21 is fixed to the inner wall of the socket 32 ​​opposite the upper collar 9. The horizontal shaft 21 extends horizontally, and a rotating rod 22 is hingedly mounted on the outer wall of the horizontal shaft 21. Each travel column 19 on the collar 9 above the socket 32 ​​is fixedly connected to a first rope 23, with the end of the first rope 23 away from the travel rod fixedly connected to one end of the rotating rod 22.

[0094] Reference Figure 11 and Figure 12 The end of the rotating rod 22 away from the first rope 23 is fixedly connected to the pull rope 11, and the travel column 19 on the ring 9 below the socket 32 ​​is fixedly connected to the second rope 24. The lower end of the pull rope 11 extends downward to the position corresponding to the socket 32, and the end of the second rope 24 away from the travel column 19 is connected to the pull rope 11.

[0095] The upper end of the pull rope 11 extends upward to the crane ship and is connected to the winding device. When the guide seat 7 unlocks the abutment seat 5 and abuts against the connecting tube 1012, the pull rope 11 is wound up by the winding device to pull the pull rope 11 upward, thereby driving the second rope 24 and the stroke shaft connected to the second rope 24 to move upward along the stroke groove 20, and one end of the rotating rod 22 moves upward, and the end of the rotating rod 22 connected to the first rope 23 moves downward, so that the first rope 23 and the stroke shaft connected to the first rope 23 move downward along the stroke groove 20, thereby driving the two rings 9 to move toward each other, and making the connecting hook 73 hooked to the corresponding handle 10.

[0096] When the travel rod abuts against the end of the travel groove 20 so that the distance between the two collars 9 is the shortest, the tilting rod 71 and the hinge rod 72 in each guide seat 7 extend in the same straight line direction, and the guide seat 7 located at the upper portion of the plug seat 32 extends away from the collar 9 toward the abutment seat 5, while the guide seat 7 located at the lower portion of the plug seat 32 extends away from the abutment seat 5 along the original direction of the collar 9, thereby making the plug seat 32 coaxial with the connecting tube 1012 and restricting the movement of the plug seat 32 within the connecting tube 1012. In addition, the two collars 9 always cover the travel groove 20 during movement, and when the distance between the two collars 9 is the shortest, the through hole on the collar 9 that cooperates with the positioning rod 14 and the through hole on the plug seat 32 that cooperates with the positioning rod 14 are staggered.

[0097] The implementation principle of the jacket foundation of the present embodiment is as follows: When the socket 32 ​​is inserted downwardly into the connecting tube 1012, the guide seat 7 is locked and forms an inclined surface 8. The socket 32 ​​is guided coaxially with the connecting tube 1012 by the inclined surface 8. When the abutment seat 5 abuts the connecting tube 1012, the pressure rod 17 releases the locking assembly, allowing the connecting hook 73 to attract the hinged rod 72 to the inner wall of the socket 32. The pull rope 11 is then pulled upward, driving the first rope 23 upward and the second rope 24 downward, thereby moving the two rings 9 toward each other. Simultaneously, the two rings 9 rotate until the connecting hook 73 hooks onto the corresponding handle 10, thereby restricting the socket 32 ​​from moving within the connecting tube 1012.

[0098] The present application also provides a construction method for a jacket foundation.

[0099] A jacket foundation construction method comprises the following steps:

[0100] S1, transporting the foundation structure 1 and the truss structure 3 to the designated sea area respectively;

[0101] S2, the foundation structure 1 is lowered to the seabed by cooperating with the first lifting lug 103 through the crane vessel, with the connecting tube 1012 of the foundation structure 1 being located above the suction tube 1011. When the foundation structure 1 reaches the seabed, it is fixed to the seabed by the suction tube 1011, and the connecting tube 1012 is in a vertical position;

[0102] S3, in one embodiment, the truss structure 3 is lowered to the corresponding foundation structure 1 by cooperating with the second lifting lug 33 through a crane vessel. The truss structure 3 maintains the state in which the socket 32 ​​is located at the bottom of the supporting truss 31, so that the socket 32 ​​is vertically inserted downward into the sleeve cavity 2 of the corresponding connecting tube 1012;

[0103] In one embodiment, the truss structure 3 is lowered to the corresponding foundation structure 1 by cooperating with the second lifting lug 33 via a crane vessel. The truss structure 3 maintains the socket 32 ​​at the bottom of the supporting truss 31. The socket 32 ​​is inserted downward into the socket cavity 2 of the corresponding connecting tube 1012. The socket 32 ​​is guided by the inclined surface 8 and adjusted to a coaxial position with the connecting tube 1012. When the abutment seat 5 abuts the end surface of the connecting tube 1012, the drawstring 11 is pulled upward by the winding device on the crane vessel, causing the two rings 9 to move toward each other until the connecting hook 73 hooks the corresponding handle 10.

[0104] S4, fill the high-strength grouting material into the grouting cavity through the grouting pipe, and remove the spreader after the grouting is completed.

[0105] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A jacket foundation, characterized in that: include: A foundation structure (1) comprises a foundation pile (101), a connecting seat (102) and a first lifting lug (103), wherein the number of the foundation piles (101) is more than two, the connecting seat (102) is connected between two adjacent foundation piles (101), the first lifting lug (103) is connected to the connecting seat (102), and the foundation pile (101) has a sleeve cavity (2) with an opening facing upward; A truss structure (3) comprising a supporting truss (31), a socket (32), and a second lifting lug (33), wherein the second lifting lug (33) is connected to the supporting truss (31), the socket (32) is arranged at the bottom of the supporting truss (31), and the socket (32) corresponds to the foundation pile (101) one by one, so that the socket (32) is plugged into the sleeve cavity (2) corresponding to the foundation pile (101); When the socket (32) is plugged into the foundation pile (101), the outer wall of the socket (32) and the inner wall of the foundation pile (101) enclose a grouting cavity, so that the socket (32) and the corresponding foundation pile (101) are connected by grouting; The plug seat (32) is cylindrical, and has a plurality of guide seats (7) distributed along the circumference of the plug seat (32). The guide seat (7) has an inclined surface (8), and the inclined surface (8) is inclined upward in a direction close to the support truss (31) to guide the plug seat (32) during the plugging process between the plug seat (32) and the foundation pile (101), so that the plug seat (32) and the foundation pile (101) are coaxially arranged; Two collars (9) are sleeved on the outer wall of the socket (32), and the two collars (9) are distributed axially along the socket (32). The guide seat (7) includes: A tilting rod (71) is hinged to the outer wall of the collar (9); A hinged rod (72) hinged to an end of the tilting rod (71) away from the collar (9); A connecting hook (73) connected to an end of the hinged rod (72) away from the tilting rod (71); The connector (32) has a locking assembly for locking the connecting hook (73). When the connecting hook (73) is locked by the locking assembly, the connecting hook (73) abuts against the outer wall of the collar (9) and is positioned. The guide seats (7) on the two collars (9) are mirror-symmetrical, and the guide seats (7) guide the movement of the connector (32). The foundation pile (101) is provided with a magnetic member on the inner wall of the sleeve cavity (2), and the foundation pile (101) has an unlocking member in the sleeve cavity (2), and the unlocking member is used to release the locking component from locking the connecting hook (73), so that the connecting hook (73) is attracted by the magnetic member and abuts against the inner wall of the sleeve cavity (2); The foundation pile (101) is provided with a handle (10) corresponding to the connecting hook (73) on the inner wall of the sleeve cavity (2), and the plug seat (32) is provided with a pull rope (11) that cooperates with the ring (9). When the pull rope (11) is pulled in a direction close to the supporting truss (31), the two rings (9) are driven to rotate and move toward each other, so that the connecting hook (73) is hooked onto the corresponding handle (10), and the tilting rod (71) and the hinge rod (72) in the same guide seat (7) extend along the same straight line direction.

2. The jacket foundation according to claim 1, characterized in that: The socket (32) is hollow inside, and a grouting pipeline (4) extending into the grouting cavity is provided inside the socket (32).

3. The jacket foundation according to claim 1, characterized in that: An abutment seat (5) is provided at one end of the plug seat (32) close to the supporting truss (31). When the plug seat (32) moves in the foundation pile (101) until the abutment seat (5) abuts against the foundation pile (101), the abutment seat (5) closes the sleeve cavity (2).

4. The jacket foundation according to claim 3, characterized in that: An anti-shear key (6) is enclosed on the outer wall of the socket (32).

5. The jacket foundation according to claim 1, characterized in that: The locking assembly comprises, The mounting box (12) is connected to the inner wall of the socket (32), extends axially along the socket (32), and has an opening at the bottom that passes through the bottom of the socket (32); A movable seat (13) moves in the installation box (12) along an axial direction perpendicular to the plug seat (32); A positioning rod (14) connected to the movable seat (13) and extending outside the installation box (12); An elastic member (15) is located in the installation box (12) and cooperates with the movable seat (13) to give the movable seat (13) a tendency to move toward the outer wall of the socket (32); The movable seats (13) on the same vertical line are located in the same installation box (12). When the movable seat (13) abuts against a side of the installation box (12) close to the outer wall of the socket (32), the positioning rod (14) is simultaneously passed through the socket (32), the collar (9) and the connecting hook (73). The movable seat (13) has a guide slope (16) on a side away from the supporting truss (31), and the unlocking member includes a pressure rod (17) provided on the foundation pile (101), the pressure rod (17) is located in the sleeve cavity (2) and corresponds to the installation box (12), and the top of the pressure rod (17) has a pointed head (18); When the socket (32) gradually enters the sleeve cavity (2), the pointed head (18) cooperates with the guiding inclined surface (16) to move the movable seat (13) away from the outer wall of the socket (32) so that the positioning rod (14) is separated from the ring (9) and the connecting hook (73).

6. The jacket foundation according to claim 1, characterized in that: The inner wall of the collar (9) has a travel column (19) extending into the socket (32), and the socket (32) has a travel groove (20) for the travel column (19) to slide, and the travel groove (20) extends obliquely along the circumference of the socket (32); the socket (32) has a transverse axis (21), and a rotating rod (22) is hinged on the transverse axis (21), wherein a first rope (23) is connected between the travel column (19) on one of the collars (9) and one end of the rotating rod (22), and a second rope (24) is connected between the travel column (19) on the other collar (9) and the pull rope (11), and the pull rope (11) is connected to the end of the rotating rod (22) away from the first rope (23).

7. A construction method for a jacket foundation according to any one of claims 1 to 6, characterized in that: The following steps are included: S1, transport the foundation structure (1) and the truss structure (3) to the designated sea area respectively; S2, using a crane vessel and the first lifting lug (103) to lower the foundation structure (1) to the seabed, so that the foundation structure (1) is fixed to the seabed; S3, using a crane vessel and a second lifting lug (33) to lower the truss structure (3) to the corresponding foundation structure (1), so that the socket (32) is vertically inserted downward into the socket cavity (2) of the corresponding foundation pile (101); S4, fill the high-strength grouting material into the grouting cavity, and remove the sling after the grouting is completed.

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