Synchronous and rapid construction system for offshore wind power steel pipe composite pile foundation

Abstract

The utility model relates to the technical field of pile foundation engineering, in particular to an offshore wind power steel pipe composite pile foundation synchronous and rapid construction system which comprises a self-elevating platform, the self-elevating platform comprises a supporting column and a platform, the bottom of the supporting column is arranged on the seabed, and the platform is supported by the supporting column. A plurality of steel pipe composite pile construction hole sites are formed in the platform, a rack with a rotary power head is arranged at each steel pipe composite pile construction hole site, and the racks are connected with steel pipes of steel pipe composite piles. The utility model has the advantages that: a plurality of steel pipe piles are adopted, stirring sinking is carried out simultaneously, the construction speed is high, steel pipe sinking, concrete pouring in the steel pipes, bearing platform construction and truss construction can be carried out in stages in a plurality of wind power foundations, and the overall construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation engineering, in particular to a synchronous and rapid construction system for offshore wind power steel pipe composite pile foundations. Background Art

[0002] At present, the most commonly used offshore wind power foundations in China are steel pipe pile single pile foundations, steel pipe pile high pile pedestal foundations, etc.; due to the harsh offshore construction environment and short construction window period, the foundation must be implemented quickly. The current steel pipe pile foundations, especially multi-pile steel pipe pile foundations, have a relatively long construction time and are more difficult to construct in sea areas with a short construction window period. Summary of the Invention

[0003] The purpose of this utility model is to provide a synchronous and rapid construction system for offshore wind power steel pipe composite pile foundations based on the above-mentioned deficiencies of the existing technology. By setting up a self-elevating platform and configuring corresponding equipment, the rapid construction of offshore wind power steel pipe composite pile foundations can be achieved and the construction quality can be guaranteed.

[0004] The purpose of this utility model is achieved by the following technical solutions:

[0005] A synchronous and rapid construction system for offshore wind power steel pipe composite pile foundations is characterized in that: the construction system includes a self-elevating platform, the self-elevating platform includes pillars and a platform, the bottom of the pillars is set on the seabed, the platform is supported by the pillars, a plurality of steel pipe composite pile construction holes are opened on the platform, each of the steel pipe composite pile construction holes is provided with a frame with a rotary power head, and the frame is connected to the steel pipe of the steel pipe composite pile.

[0006] Grouting equipment matching the number of the steel pipe composite pile construction holes is provided on the platform. Each of the grouting equipment is connected to a grouting pipe, which is passed through the steel pipe and injects grout into the mixing head.

[0007] The steel pipes are connected to form an integral structure by arranging truss rods.

[0008] The steel pipe is provided with ribs at a position below the seabed.

[0009] The advantages of the utility model are:

[0010] 1) Multiple pile foundations can be drilled simultaneously to increase construction speed: Due to the use of rotary drilling technology, multiple drills can be used on the construction platform to perform synchronous rotary drilling construction, which greatly improves the construction speed of multiple pile foundations;

[0011] 2) Multiple steps and platforms can be carried out simultaneously, creating an assembly line operation to improve construction efficiency: After the steel pipe is sunk, the jack-up platform can be evacuated to start construction on the next platform. Subsequent concrete pouring and hoop truss construction can be carried out simultaneously, improving construction efficiency;

[0012] 3) High structural rigidity, strong stability, and applicable to large seawater depths: The CFST column has high structural rigidity and is an integrated structure with the CFST mixed composite piles below the seabed. Its overall stability is significantly improved compared to the hollow steel tube high pile cap foundation. At the same time, since the CFST column has good circumferential compressive strength, the CFST columns can be connected into a truss system using sleeve bolts on site. After adding the steel tube truss, the stability of the pile cap foundation can be greatly improved, allowing this structure to be used in areas with relatively deep sea water, greatly increasing the applicable water depth of fixed foundations in offshore wind power (estimated to reach 100m), creating technical conditions for offshore wind power to move to the deep sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of construction step I in the present utility model;

[0014] Figure 2 It is a top view of construction step I in the present utility model;

[0015] Figure 3 This is a schematic diagram of construction step II in the present utility model;

[0016] Figure 4 This is a schematic diagram of the installation of the top truss in the present utility model;

[0017] Figure 5 This is a schematic diagram of construction step III in the present utility model;

[0018] Figure 6 This is a schematic diagram of construction step IV in the present utility model;

[0019] Figure 7 This is a schematic diagram of the installation of the center support platform of the utility model;

[0020] Figure 8 This is a schematic diagram of the connection structure of the truss in the utility model;

[0021] Figure 9 It is a structural schematic diagram of the utility model after construction is completed. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0023] like Figure 1As shown in the figure, marks 1-23 respectively represent: grouting equipment 1, grouting pipe 2, frame 3, rotary power head 4, self-elevating platform 5, steel pipe 6, grouting pipe 7, rib 8, construction hole 9, pile foundation 10, top truss 11, concrete mixing ship 12, reinforced concrete base 13, truss rod 14, hoop 15, cement soil 16, concrete 17, mixing head 18, bolt 19, wind turbine 20, wind turbine blade 21, tower 22, and steel tube concrete structure 23.

[0024] Example: Figures 1 to 9 As shown, the synchronous and rapid construction system for offshore wind power steel pipe composite pile foundation in this embodiment is used to construct the steel pipe composite pile foundation at sea, and specifically includes the following steps:

[0025] (1) A self-elevating platform 5 is established at sea. The self-elevating platform 5 includes a platform and columns at the corner points around it. The bottom of each column is firmly set on the seabed to stably support the platform. A plurality of construction holes 9 for the construction of steel pipe composite piles are set on the self-elevating platform 5. Each construction hole 9 corresponds to a pile foundation 10. A frame 3 is set at the position of each construction hole 9. A rotary power head 4 is set on the frame 3. The frame 3 can clamp the steel pipe 6 with ribs 8 and drive the steel pipe 6 and the mixing head 18 at the bottom thereof to mix and sink synchronously through the rotary power head 4. A grouting device 1 is set on the platform. The grouting device 1 is connected to the grouting pipe 7 set in the steel pipe 6 through the grouting pipe 2 so as to grout the mixing head 18 during the mixing and sinking process of the steel pipe 6.

[0026] (2) The steel pipe 6 is extended to the designed pile length. Ribs 8 are provided on the periphery of the steel pipe 6 below the seabed to enhance the connection between the steel pipe 6 and the cement soil 16 surrounding it, thereby improving the bearing capacity of the pile foundation.

[0027] (3) After the steel pipe 6 is sunk to the designed elevation, a top truss 11 is set on the top of the piles. The top truss 11 connects the piles and initially stabilizes the pile system. The jack-up platform 5 is removed and concrete 17 is poured into the steel pipe 6 by the concrete mixing ship 12.

[0028] (4) A formwork is set up on the top based on the steel pipe 6 and the top truss 11, and the reinforced concrete foundation 13 is cast. At the same time, a steel cage is set in the steel pipe 6 and connected to the steel cage of the reinforced concrete platform 13, thereby improving the connection performance between the steel pipe pile and the reinforced concrete foundation 13. At the same time, according to the stress conditions, a truss system is formed on the steel pipe concrete structure 23 in the sea water using a structure of a hoop 15, a truss rod 14 and a bolt 19, making the foundation structure more stable to adapt to deeper sea water and larger wind turbines.

[0029] (5) A wind turbine structure including a wind turbine set 20, wind turbine blades 21, and a tower 22 is arranged on the reinforced concrete foundation 13.

[0030] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A synchronous and rapid construction system for offshore wind power steel pipe composite pile foundation, characterized by: The construction system includes a self-elevating platform, which includes pillars and a platform. The bottom of the pillars is set on the seabed, and the platform is supported by the pillars. A plurality of steel pipe composite pile construction holes are opened on the platform. Each of the steel pipe composite pile construction holes is provided with a frame with a rotary power head, and the frame is connected to the steel pipe of the steel pipe composite pile.

2. The synchronous and rapid construction system for offshore wind power steel pipe composite pile foundation according to claim 1 is characterized by: Grouting equipment matching the number of the steel pipe composite pile construction holes is provided on the platform. Each of the grouting equipment is connected to a grouting pipe, which is passed through the steel pipe and injects grout into the mixing head.

3. The synchronous and rapid construction system for offshore wind power steel pipe composite pile foundation according to claim 1 is characterized by: The steel pipes are connected to form an integral structure by arranging truss rods.

4. The synchronous and rapid construction system for offshore wind power steel pipe composite pile foundation according to claim 1 is characterized by: The steel pipe is provided with ribs at a position below the seabed.

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