A catheter rack foundation with bifurcated catheter legs and a construction method thereof

Abstract

The present invention discloses a catheter frame foundation with bifurcated catheter legs, comprising a truss body connected by a plurality of connecting rods and a plurality of catheter frame legs, a foundation ring structure is arranged at the top of the truss body, the catheter leg comprises a column and at least two bent branch pillars fixedly connected to the lower end of the column, a force-bearing pile sleeve is fixed between the branch pillars, an auxiliary pile sleeve is fixedly arranged at the high water level of the catheter frame leg, and the force-bearing pile sleeve and the auxiliary pile sleeve are staggered. During construction, the overall structure can be prefabricated and assembled in a factory, then hoisted to the seabed and preliminarily leveled, and then temporary piles are driven to temporarily fix the catheter frame foundation, and then the force-bearing piles are driven in, and the force-bearing piles and the pile sleeves are connected by annular high-strength grouting, so as to form a stable foundation. The self-supporting and pile-driving guide of the present invention greatly reduces the construction difficulty of positioning, leveling, stabilization, etc. of the offshore catheter frame, does not require a guide frame, simplifies the water construction process, is safe to operate and saves construction time, has better economy, and has a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering jacket foundation, in particular to a jacket foundation with jacket leg bifurcated for marine engineering and a construction method thereof. Background Art

[0002] Offshore wind power is booming. As offshore wind power becomes larger and larger, the water depth of wind turbines becomes deeper, the wind and wave conditions become more severe, and the geological conditions become more complex, making it increasingly difficult to control the positioning, leveling, and fixing of wind turbine jacket foundations. In more complex waters, the previous construction method of using a special guide platform for piling, and then installing and fixing the jacket requires too many on-site construction links on the water, with a long construction period and great construction difficulty, which has a great impact on the safety and economy of the project.

[0003] The above discussion is intended to introduce the reader to various aspects of the technology that may be related to various aspects of the present invention that will be described and / or claimed below. It is believed that the discussion is helpful in providing the reader with background information to facilitate a better understanding of the present invention. Summary of the invention

[0004] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a conductor frame foundation with bifurcated conductor legs for marine engineering. When the conductor frame foundation is used for construction, the construction difficulty of positioning, leveling, stabilization, etc. of the offshore conductor frame can be greatly reduced, no guide frame is required, the water construction process is simplified, the operation is safe, the construction period is saved, and the economy is better.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a catheter frame foundation with bifurcated catheter legs, including a truss body connected by multiple connecting rods and multiple catheter frame legs, a foundation ring structure is arranged on the top of the truss body, and is characterized in that: the catheter leg column includes a column body and at least two bent branch columns fixedly connected to the lower end of the column body, load-bearing pile sleeves are fixed between the branch columns, and an auxiliary pile sleeve is fixed at the high water level of the catheter frame leg column, and the load-bearing pile sleeve and the auxiliary pile sleeve are staggered.

[0006] Preferably, the truss body is a regular polygonal steel truss structure.

[0007] Preferably, there are two branch pillars, and the load-bearing pile sleeve is fixed on the two branch pillars through a shear plate. The upper parts of two adjacent branch pillars are also fixedly connected by a connecting cross bar.

[0008] Preferably, the load-bearing pile sleeves are provided in plurality, and the plurality of load-bearing pile sleeves and the branch pillars are fixedly connected to each other via shear plates or upper and lower yoke plates.

[0009] Preferably, an anti-sinking plate is further provided at the bottom of the conductor frame leg.

[0010] The present invention also provides a construction method for a conductor frame foundation with bifurcated conductor legs, which is characterized by comprising the following steps: S1, processing, manufacturing, assembling and connecting the conductor frame foundation with bifurcated conductor legs in a factory; S2, using a crane ship or a construction platform to carry out hoisting construction of the conductor frame foundation with bifurcated conductor legs in a project sea area, placing it on the seabed after measurement and positioning, and performing preliminary leveling on the foundation; S3, passing a temporary pile through an auxiliary pile sleeve and driving it into the seabed soil layer with a vibrating hammer; S4, performing fine re-leveling using a hoisting device, and then temporarily fixing and connecting the temporary pile with the auxiliary pile sleeve to ensure that the horizontal and vertical accuracy of the conductor frame foundation meets the requirements and the safety during the construction period; S5, using a pile hammer to drive a stressed pile through the stressed pile sleeve into the seabed soil layer; S6, fixing and connecting the stressed pile and the stressed pile sleeve by annular high-strength grouting; S7, when the connection between the stressed pile and the stressed pile sleeve meets the foundation stability condition, the temporary pile is vibrated and pulled out and recovered to complete the construction of the conductor frame foundation.

[0011] Furthermore, in step S7, after the temporary pile is recovered, the auxiliary pile sleeve is sealed and anti-corrosion treatment is performed on the upper and lower ports.

[0012] Beneficial effects of the present invention: the overall structure of the present invention can be prefabricated and assembled in the factory, and the production is fast and convenient, with a high degree of factoryization; positioning, installation and preliminary leveling are carried out during on-site construction, and then temporary piles are driven through the construction auxiliary pile sleeves on the conductor frame, and the conductor frame is temporarily fixed after leveling, and then the engineering piles are sunk through the pile sleeves. It can sit on the bottom, be self-supporting and guide pile driving, which greatly reduces the construction difficulty of positioning, leveling, stabilization, etc. of the offshore conductor frame, and does not require a guide frame, which solves the eccentric force problem of the conductor leg column and the load-bearing pile being connected on a different axis, simplifies the construction process on the water, is safe to operate, and saves about 30% of the construction period, and is more economical.

[0013] In addition, multiple load-bearing foundation piles can be set under one duct leg column, which has good flexibility and is suitable for various water depths, geology and sea conditions. It will have broad application prospects in marine engineering, especially offshore wind power projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0015] FIG. 1 is a schematic elevation view of the present invention.

[0016] Figure 2 It is a schematic elevation view of the catheter leg bifurcation structure in the present invention.

[0017] Figure 3 for Figure 1Cross-sectional view of AA.

[0018] Figure 4 for Figure 2 Cross-section of BB.

[0019] Figure 5 It is a cross-sectional schematic diagram of a catheter leg bifurcation section provided with two pile sleeves in the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0021] like Figure 1 , 2 As shown in 3, a catheter rack foundation with bifurcated catheter legs of the present invention comprises a truss body 1 connected by a plurality of connecting rods 10 and a plurality of catheter rack legs 2, and a foundation ring structure 11 is arranged at the top of the truss body 1.

[0022] The catheter leg column 2 includes a column 21 and at least two bent branch columns 22 fixedly connected to the lower end of the column, a load-bearing pile sleeve 4 is fixed between the branch columns 22, and an auxiliary pile sleeve 3 is fixed at the high water level of the catheter leg column 2, and the auxiliary pile sleeve 3 can also be used as a berthing part. The auxiliary pile sleeve 3 and the load-bearing pile sleeve 4 are staggered; the auxiliary pile sleeve 3 is used to drive temporary piles, and the load-bearing pile sleeve 4 is used to drive load piles. Specifically, the catheter leg column 2 and the auxiliary pile sleeve 3 are connected by a connecting flange 9.

[0023] Preferably, the truss body is a regular polygonal steel truss structure. An anti-sinking plate 6 is also provided at the bottom of each jacket leg column 2 .

[0024] In this embodiment, two branch pillars are provided, and the load-bearing pile sleeves 4 are fixed on the two branch pillars through shear plates 7. The upper parts of two adjacent branch pillars are also fixedly connected by a connecting cross bar 8. In addition to the connection and fixation by the shear plates 7, the load-bearing pile sleeves 4 and the conduit leg pillars 2 can also be fixed by upper and lower yoke plates.

[0025] Specifically, the load-bearing pile sleeve 4 may be provided with a Figure 4 As shown. There can also be two, such as Figure 5 Of course, more than two stress-bearing pile sleeves 4 can be provided according to actual needs, and multiple stress-bearing pile sleeves 4 and branch pillars can be fixedly connected by shear plates 7. By providing multiple pile sleeves 4 at each leg support point, multiple foundation piles can be driven in, which can well adapt to complex geological conditions and also reduce the number of rock-embedded piles used.

[0026] Specifically, the truss body 1 is a regular tetragonal steel truss structure; of course, in actual production, the truss body 1 can also be designed as a regular tetragonal, pentagonal, or hexagonal steel truss structure according to actual needs. The conductor frame leg column 2, the auxiliary pile sleeve 3, the load-bearing pile sleeve 4, the connecting cross bar 8, and the connecting rod 10 are all made of steel pipes.

[0027] The present invention also provides a construction method for a catheter frame foundation with bifurcated catheter legs, comprising the following steps:

[0028] S1. Process and manufacture the various components of the jacket foundation in the factory, and assemble and connect the components on land to form a jacket with bifurcated jacket legs.

[0029] S2. Use a crane ship or construction platform to carry out the above-mentioned jacket hoisting construction in the engineering sea area, place it on the seabed after measurement and positioning, and perform preliminary leveling of the foundation.

[0030] S3, passing the temporary pile through the auxiliary pile sleeve 3 and driving it into the seabed soil layer with a vibrating hammer.

[0031] S4. Use the lifting equipment to perform fine re-leveling, and then temporarily fix the temporary piles and the auxiliary pile sleeves 3 to ensure that the horizontal and vertical accuracy of the jacket foundation meets the requirements and is safe during the construction period.

[0032] S5. Use a pile hammer to drive the stressed pile 5 through the pile sleeve 4 into the seabed soil layer.

[0033] S6. The load-bearing pile 5 and the pile sleeve 4 are fixedly connected by annular high-strength grouting.

[0034] S7. When the connection between the stressed pile 5 and the stressed pile sleeve 4 meets the foundation stability condition, the temporary pile is vibrated and pulled out and recovered to complete the construction of the jacket foundation.

[0035] Furthermore, in step S7, after the temporary pile is recovered, the auxiliary pile sleeve 3 is sealed and anti-corrosion treatment is performed on the upper and lower ports.

[0036] The above contents are only used to illustrate the technical solution of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention made by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A catheter rack foundation with bifurcated catheter legs, comprising a truss body (1) connected by a plurality of connecting rods (10) and a plurality of catheter legs (2), a foundation ring structure (11) being arranged at the top of the truss body (1), characterized in that: The conduit leg column (2) comprises a column body and at least two branch columns fixedly connected to the lower end of the column body, a load-bearing pile sleeve (4) is fixed between the branch columns, an auxiliary pile sleeve (3) is fixedly provided at a high water level of the conduit leg column (2), and the load-bearing pile sleeve (4) and the auxiliary pile sleeve (3) are staggered.

2. The catheter frame foundation with bifurcated catheter legs according to claim 1, characterized in that: The truss body is a regular polygonal steel truss structure.

3. The catheter frame foundation with bifurcated catheter legs according to claim 1, characterized in that: Two sub-columns are provided, and the load-bearing pile sleeve (4) is fixed on the two sub-columns via a shear plate (7).

4. The catheter frame foundation with bifurcated catheter legs according to claim 1, characterized in that: The load-bearing pile sleeves (4) are provided in plurality, and the plurality of load-bearing pile sleeves (4) and the branch pillars are fixedly connected via shear plates (7) or upper and lower yoke plates.

5. The catheter frame foundation with bifurcated catheter legs according to claim 1, characterized in that: The upper parts of two adjacent branch pillars are also fixedly connected via a connecting cross bar (8).

6. The catheter frame foundation with bifurcated catheter legs according to any one of claims 1 to 4, characterized in that: An anti-sinking plate (6) is also provided at the bottom of the catheter leg column (2).

7. The construction method of the catheter rack foundation with bifurcated catheter legs according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1, processing, manufacturing and assembling a catheter frame foundation connected to form a catheter leg column bifurcation in a factory; S2. Use a crane ship or construction platform to carry out the hoisting construction of the conductor frame foundation with bifurcated conductor legs in the engineering sea area, place it on the seabed after measurement and positioning, and perform preliminary leveling of the foundation; S3, passing the temporary pile through the auxiliary pile sleeve (3) and driving it into the seabed soil layer using a vibrating hammer; S4. Use the lifting equipment to perform fine re-leveling, and then temporarily fix the temporary piles and the auxiliary pile sleeves (3) to ensure that the horizontal and vertical accuracy of the jacket foundation meets the requirements and is safe during the construction period; S5, using a pile hammer to drive the load-bearing pile (5) through the load-bearing pile sleeve (4) into the seabed soil layer; S6, the load-bearing pile (5) and the load-bearing pile sleeve (4) are fixedly connected by annular high-strength grouting; S7. When the connection between the stressed pile (5) and the stressed pile sleeve (4) meets the foundation stability condition, the temporary pile is vibrated out and recovered, thereby completing the construction of the jacket foundation.

8. The construction method of the catheter frame foundation with bifurcated catheter legs as claimed in claim 7, characterized in that: In step S7, after the temporary pile is recovered, the auxiliary pile sleeve (3) is sealed and anti-corrosion treatment is performed on the upper and lower ports.

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