Multi-suction-barrel integral foundation structure of tension leg

Abstract

The invention discloses a multi-suction-cylinder integral type foundation structure of a tension leg, the multi-suction-cylinder integral type foundation structure of the tension leg comprises a plurality of connecting rods and a plurality of suction cylinders, the connecting rods are sequentially connected end to end, the suction cylinders are connected to the connecting rods, lifting lugs and lifting lugs are connected to the suction cylinders, and the lifting lugs are connected to the connecting rods. The suction barrel is inserted into seabed soil; the ends of the multiple connecting rods are connected with first lug plates, vertical supports of the connecting rods are connected with second lug plates, and the first lug plates or the second lug plates are connected with anchor chains so that loads can be transmitted to seabed soil through the suction barrels connected with the connecting rods. The multi-suction-barrel integral foundation structure of the tension leg is suitable for a deep sea area, the whole structure is made of steel, the overall weight is small, the rated using amount of a floating crane and the specification requirements of related offshore construction equipment are met, and meanwhile the manufacturing cost and the transportation and installation cost can be reduced. The integral foundation structure can meet the design and use requirements, and the construction quality of the integral foundation structure is controllable.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore floating and semi-submersible foundation engineering, and in particular relates to a multi-suction cylinder integral foundation structure of a tension leg. Background Art

[0002] The marine engineering industry is gradually expanding to the deep sea, and floating and semi-submersible foundations are being used more and more. In order to meet the design and construction requirements, driven steel pipe piles are generally used as the foundation form, connected by anchor chains or anchor rods in the middle, so as to achieve the purpose of fixing or limiting the range of activities of floating and semi-submersible foundations.

[0003] Steel pipe pile driving construction in deep water areas generally requires a supporting pile stabilization platform. The placement, debugging and folding of the pile stabilization platform all take a lot of time. Only after one steel pipe pile is completed can the next steel pipe pile be driven in. This prolongs the offshore construction time and increases the offshore construction costs, leading to an increase in overall costs.

[0004] Therefore, it is urgent to design a multi-suction cylinder integral foundation structure of tension legs to solve the above-mentioned problems of steel pipe pile sinking construction. Summary of the invention

[0005] In order to solve the technical problem that the placement, debugging and folding of the pile stabilizing platform mentioned in the background technology all take a lot of time, and the next steel pipe pile can only be penetrated after the pile sinking construction of one steel pipe pile is completed, which prolongs the offshore construction time and increases the offshore construction cost, a tension leg multi-suction cylinder integral foundation structure is provided to solve the problem of steel pipe pile sinking construction.

[0006] To achieve the above-mentioned purpose, the specific technical solution of the multi-suction cylinder integrated foundation structure of the tension leg of the present invention is as follows: A multi-suction cylinder integral foundation structure of a tension leg comprises a plurality of connecting rods and a plurality of suction cylinders, wherein the plurality of connecting rods are connected end to end in sequence, the plurality of connecting rods are connected with suction cylinders, the suction cylinders are connected with lifting ears, and the lifting ears are lifted so that the suction cylinders are inserted into the seabed soil; the ends of the plurality of connecting rods are connected with first ear plates, the vertical supports of the connecting rods are connected with second ear plates, and the first ear plates or the second ear plates are connected to anchor chains so that the load is transferred from the suction cylinders connected to the connecting rods to the seabed soil.

[0007] Furthermore, the three connecting rods are welded end to end in sequence, with the welding points as endpoints, and the three connecting rods are arranged in an equilateral triangle.

[0008] Furthermore, the centers of the three connecting rods are vertically connected with suction cylinders.

[0009] Furthermore, the welded end points of the three connecting rods are all connected with first ear plates.

[0010] Furthermore, the connecting rods are connected to vertical supports, and both ends of the vertical supports are connected to second ear plates.

[0011] Furthermore, the second ear plates connected at both ends of the vertical support are located on both sides of the first ear plate, so that anchor chains in different directions are connected to the first ear plate or the second ear plates on both sides of the first ear plate.

[0012] Furthermore, lifting ears are welded on the tops of the three suction cylinders, and the lifting ears are connected to the lifting equipment to enable the suction cylinders to be hung.

[0013] Furthermore, one end of the suction tube away from the lifting ear is open, and the suction tube is inserted into the seabed soil along the open end.

[0014] Furthermore, a first auxiliary steel beam is connected between the three suction cylinders.

[0015] Furthermore, the first auxiliary steel beams are connected to each other end by end with second auxiliary steel beams, and the second auxiliary steel beams are arranged in an equilateral triangle to stabilize the structure between the suction cylinders.

[0016] The multi-suction cylinder integrated foundation structure of the tension leg of the present invention has the following advantages: The entire structure is transported to the project site by a transport barge. After the entire structure is lifted and slowly lowered to the preset position on the seabed by a sling, the suction cylinder can be sunk to the designed depth, and finally the anchor chain is connected at the ear plate. This application is suitable for deep waters. The entire structural material is steel, and the overall weight is not large, which meets the rated usage and specifications of related offshore construction equipment, and can also reduce the production cost and transportation and installation cost. The suction cylinder enters the soil to a certain depth, which can meet the design and use requirements, and the construction quality of the integral foundation structure is controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of the multi-suction cylinder integrated foundation structure of the tension leg of the present invention; Figure 2 It is a front view of the multi-suction cylinder integrated foundation structure of the tension leg of the present invention.

[0018] Description of the markings in the figure: 1. Connecting rod; 2. Suction cylinder; 3. Lifting ear; 4. First ear plate; 5. Second ear plate; 6. Vertical support; 7. First auxiliary steel beam; 8. Second auxiliary steel beam. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 2 The multi-suction cylinder integrated foundation structure of the tension leg of the present invention is described.

[0022] like Figure 1 As shown, the multi-suction cylinder integral foundation structure of the tension leg in the present invention includes a plurality of connecting rods 1 and a plurality of suction cylinders 2, the plurality of connecting rods 1 are connected end to end in sequence, the plurality of connecting rods 1 are connected with suction cylinders 2, the suction cylinders 2 are connected with lifting ears 3, and the lifting ears 3 are lifted so that the suction cylinders 2 are inserted into the seabed soil; the ends of the plurality of connecting rods 1 are connected with first ear plates 4, the vertical supports 6 of the connecting rods 1 are connected with second ear plates 5, and the first ear plates 4 or the second ear plates 5 are connected to the anchor chain so that the load is transferred from the suction cylinders 2 connected to the connecting rods 1 to the seabed soil.

[0023] The entire structure is transported to the project site by a transport barge, and after the entire structure is lifted and slowly lowered to a preset position on the seabed by a sling, the suction cylinder 2 can be sunk to the designed depth, and finally the anchor chain is connected at the ear plate. This application is suitable for deep waters. The entire structural material is made of steel, and the overall weight is not large, which meets the rated usage of the floating crane and the specifications of related offshore construction equipment, and can also reduce the production cost and transportation and installation cost. The suction cylinder 2 enters the soil to a certain depth, which can meet the design and use requirements, and the construction quality of the integral foundation structure is controllable.

[0024] Further, if Figure 1 As shown, three connecting rods 1 are welded end to end in sequence, with the welding points as endpoints, and the three connecting rods 1 are arranged in an equilateral triangle; the centers of the three connecting rods 1 are vertically connected to the suction cylinders 2.

[0025] In this embodiment, preferably, the connecting rods 1 are welded end to end in sequence so that the overall structure is an equilateral triangle, so that the rigid structure formed by the three connecting rods 1 is stable, and three suction cylinders 2 are vertically welded at the center points of the three connecting rods 1, and the three suction cylinders 2 are vertically connected to the connecting rods 1.

[0026] As a preferred embodiment, the integral basic structure can be composed of five, seven or other odd number of connecting rods 1 connected end to end in sequence, and the suction cylinder 2 is welded at the center position of the connecting rod 1.

[0027] Further, if Figure 1 and Figure 2 As shown, the first ear plates 4 are connected to the welded end points of the three connecting rods 1; the connecting rods 1 are connected to vertical supports 6, and the two ends of the vertical supports 6 are connected to second ear plates 5; the second ear plates 5 connected to the two ends of the vertical supports 6 are located on both sides of the first ear plate 4, so that anchor chains in different directions can be connected to the first ear plate 4 or the second ear plates 5 on both sides of the first ear plate 4.

[0028] In this embodiment, the end points where three connecting rods 1 are welded together are taken as vertices, and first ear plates 4 are welded at the three vertices, and the first ear plates 4 and the three connecting rods 1 are all located on the same plane; second ear plates 5 are welded at adjacent positions on both sides of the first ear plate 4, respectively. Preferably, vertical supports 6 are connected to the positions of the connecting rods 1 near the ends, and the second ear plates 5 on both sides of the first ear plate 4 are respectively welded at both ends of the vertical supports 6 to ensure that anchor chains or anchor rods from different directions are connected to the first ear plate 4 or the second ear plate 5.

[0029] Further, if Figure 1 As shown, a lifting lug 3 is welded on the top of each of the three suction cylinders 2, and the lifting lug 3 is connected to a sling so that the suction cylinder 2 can be suspended; the end of the suction cylinder 2 away from the lifting lug 3 is open, and the suction cylinder 2 is inserted into the seabed soil along the open end; a first auxiliary steel beam 7 is connected between each of the three suction cylinders 2; second auxiliary steel beams 8 are connected in sequence from head to tail between the first auxiliary steel beams 7, and the second auxiliary steel beams 8 are arranged in an equilateral triangle so that the structure between the suction cylinders 2 is stable.

[0030] In this embodiment, lifting ears 3 are welded on the tops of the three suction cylinders 2, and the lifting ears 3 are lifted by a lifting device to realize the lifting and placing of the integral foundation structure.

[0031] The suction cylinder 2 is a large-diameter steel cylindrical structure with an open bottom and a closed top. The suction cylinder 2 sinks freely to the seabed and relies on its own gravity to insert the edge of the cylinder into the seabed soil, forming a sealed space between the suction cylinder 2 and the soil. Then, an underwater submersible pump is used to pump out the water in the cylinder to form an internal and external pressure difference. When the force of the pressure difference acting on the cylinder is greater than the resistance between the soil and the cylinder, the suction cylinder slowly penetrates into the soil. When the top of the suction cylinder is completely in contact with the seabed soil, the penetration stops. Preferably, if the surface soil of the seabed is relatively soft, measures to increase the length of the suction cylinder can be considered.

[0032] Preferably, a first auxiliary steel beam 7 is welded between each of the three suction cylinders 2, and the multiple first auxiliary steel beams 7 have the same overall shape and size. The second auxiliary steel beams 8 are connected in sequence with the centers of the multiple first auxiliary steel beams 7 as the vertices, so that the multiple second auxiliary steel beams 8 form a stable equilateral triangle structure, ensuring that after the load is transmitted along the anchor chain to the suction cylinder 2 connected to the connecting rod, the load is transmitted along the suction cylinder 2 to the seabed soil, and ensuring that the welding points of the integral foundation structure are stable and no weld cracking occurs.

[0033] The construction steps of the multi-suction cylinder integral foundation structure of the tension leg in this application are as follows: First, the entire structure is transported to the project site by a transport barge, and then lifted by a sling and slowly lowered to a preset position on the seabed; Then, before the suction cylinder 2 is lowered, the levelness of the overall structure needs to be adjusted to meet the design and construction requirements; Finally, the suction cylinder 2 is sunk until it penetrates to the designed depth, and a universal joint or anchor chain is connected at the first ear plate 4 or the second ear plate 5 twice.

[0034] The multi-suction cylinder integral foundation structure based on tension legs is transported to the project site by a transport barge. After the entire structure is lifted by a sling and slowly lowered to a preset position on the seabed, the suction cylinder 2 can be sunk to the designed depth, and finally the anchor chain is connected at the first ear plate 4 or the second ear plate 5. The present application is suitable for deep water areas. The entire structural material is made of steel, and the overall weight is not large, which meets the rated usage of the floating crane and the specifications of related offshore construction equipment, and can also reduce the production cost and transportation and installation cost. The suction cylinder 2 enters the soil to a certain depth, which can meet the design and use requirements, and the construction quality of the integral foundation structure is controllable.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A multi-suction cylinder integrated foundation structure of a tension leg, characterized in that: The invention comprises a plurality of connecting rods and a plurality of suction cylinders, wherein the plurality of connecting rods are connected end to end in sequence, the plurality of connecting rods are connected with suction cylinders, the suction cylinders are connected with lifting ears, and the lifting ears are lifted so that the suction cylinders are inserted into the seabed soil; the ends of the plurality of connecting rods are connected with first ear plates, the vertical supports of the connecting rods are connected with second ear plates, and the first ear plates or the second ear plates are connected with anchor chains so that the load is transferred from the suction cylinders connected with the connecting rods to the seabed soil.

2. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 1 is characterized in that: The three connecting rods are welded end to end in sequence, and the three connecting rods are arranged in an equilateral triangle with the welding points as end points.

3. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 1, characterized in that: The centers of the three connecting rods are vertically connected with suction cylinders.

4. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 2, characterized in that: The welded end points of the three connecting rods are all connected with first ear plates.

5. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 4, characterized in that: The connecting rods are connected with vertical supports, and both ends of the vertical supports are connected with second ear plates.

6. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 5, characterized in that: The second ear plates connected at both ends of the vertical support are located at both sides of the first ear plate, so that anchor chains in different directions are connected to the first ear plate or the second ear plates at both sides of the first ear plate.

7. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 1, characterized in that: Lifting ears are welded on the top of the three suction cylinders, and the lifting ears are connected to the lifting equipment to hang the suction cylinders.

8. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 7, characterized in that: The end of the suction tube away from the lifting ear is open, and the suction tube is inserted into the seabed soil along the open end.

9. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 8, characterized in that: The three suction cylinders are all connected with a first auxiliary steel beam.

10. The multi-suction cylinder integrated foundation structure of the tension leg according to claim 9, characterized in that: The first auxiliary steel beams are connected to each other end by end with the second auxiliary steel beams, and the second auxiliary steel beams are arranged in an equilateral triangle to ensure the stability of the structure between the suction cylinders.

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