Single-stand-column suction cylinder pile stabilizing platform

Abstract

The utility model relates to a single-stand-column suction cylinder pile stabilizing platform which comprises a center stand column, a bottom frame, four pile stabilizing limiting sleeves, an anti-sinking plate, four suction cylinders and a top platform. The lower end face of the bottom frame is connected with the anti-settling plate, and the four corners of the lower end face of the anti-settling plate are each connected with one suction barrel. The four corners of the bottom frame are each connected with one pile stabilizing limiting sleeve. The lower end of the center stand column is connected into the bottom frame, and the upper end of the center stand column is connected with the bottom of the top platform. The bottom frame comprises an upper-layer frame, a lower-layer frame, a plurality of first connecting rods, a plurality of second connecting rods and a plurality of first inclined supporting rods; the upper-layer frame is connected above the lower-layer frame, and the inner side of the upper-layer frame is connected with the outer wall of the lower end of the central stand column through the first connecting rods; the steel pipe pile sinking device is suitable for steel pipe pile sinking construction of a large truss type jacket foundation.

Description

Technical Field

[0001] The utility model relates to a single-column suction tube pile stabilizing platform. Background Art

[0002] As a new energy industry with huge potential and vigor, offshore wind power is an important direction for the development of renewable energy in my country under the background of "3060 dual carbon". As the development of land and nearshore wind power resources tends to be saturated, the offshore wind power industry is gradually moving towards the deep sea. Deep sea wind farms can make better use of wind energy resources and marine resources, but they also face more severe wind and wave conditions and complex engineering geological conditions. For example, the seabed surface of deep sea wind farms in Ningde, Fujian Province and Wenzhou, Zhejiang Province is 20 to 50 meters thick and muddy, which has caused great difficulties in the selection and design of wind turbine foundations and pile stabilization platforms.

[0003] Deep sea wind farms often use truss-type jackets as wind turbine foundations. Truss-type jackets bear the load of the upper wind turbine tower, environmental loads such as waves and water flow, and their own weight, and transmit the combined load to four steel pipe piles driven vertically into the seabed through the truss-type jacket. The jacket foundation adopts a pre-pile scheme, and a pile stabilization platform is required as an auxiliary facility for positioning and verticality control of steel pipe piles. The pile sinking accuracy of the jacket foundation steel pipe piles is high. Generally, the deviation of the pile top horizontality (pile axis inclination) after the pile sinking is completed is required to be less than 4‰. Therefore, in addition to ensuring that the structural strength and foundation stability of the pile stabilization platform can withstand offshore wind and wave conditions, its structural stiffness and installation horizontality must also meet the pile sinking accuracy requirements.

[0004] At present, the mainstream domestic jacket foundation stabilizing platforms are of two types: bottom-seat type and suction cylinder type. The bottom-seat type platform adopts steel pipe piles combined with anti-sinking plates. The anti-sinking plates are used for the sinking and preliminary leveling of the pile stabilizing platform, and the steel pipe piles are used for the precise leveling and fixation of the pile stabilizing platform; the suction cylinder is suitable for soft soil foundations, and its foundation bearing layer is generally selected as silty clay. For sea areas with deep silty soil, if the pile foundation type is adopted, the length of the steel pipe pile may exceed 100m, resulting in a very high overall cost of the pile stabilizing platform and poor economy; if the suction cylinder type is adopted, in order to meet the stability requirements of the pile stabilizing platform under extreme working conditions, the height of the suction cylinder is very high or the cylinder diameter is very large, the cost is high, and the slender suction cylinder is not conducive to transportation and installation. Therefore, a single-column suction cylinder pile stabilizing platform is proposed to address the above problems. Utility Model Content

[0005] The utility model aims to overcome the existing defects and provide a single-column suction tube pile stabilizing platform suitable for the steel pipe pile sinking construction of a large truss-type conductor frame foundation.

[0006] The technical solution to achieve the above purpose is: a single-column suction cylinder pile stabilizing platform, including a central column, a bottom frame, four pile stabilizing limit sleeves, an anti-sinking plate, four suction cylinders and a top platform;

[0007] The lower end surface of the bottom frame is connected to the anti-sinking plate, and each of the four corners of the lower end surface of the anti-sinking plate is connected to a suction cylinder; each of the four corners of the bottom frame is connected to a pile stabilizing limiting sleeve; the lower end of the central column is connected inside the bottom frame, and the upper end is connected to the bottom of the top platform.

[0008] Preferably, the bottom frame comprises an upper frame, a lower frame, a plurality of first connecting rods, a plurality of second connecting rods and a plurality of first diagonal bracing rods;

[0009] The upper frame is connected above the lower frame, and the inner side of the upper frame is connected to the lower outer wall of the central column via a plurality of the first connecting rods; the inner side of the lower frame is connected to the lower outer wall of the central column via a plurality of the second connecting rods; the upper end of the upper frame is connected to the outer wall of the central column via the first diagonal brace.

[0010] Preferably, the top platform includes a top frame, four extension frames and a plurality of second diagonal support rods; the top frame is connected to the upper end surface of the central column, and each of the four corners of the top frame is connected to an extension frame; the lower end surfaces of the four extension frames and the top frame are connected to the second diagonal support rods, and the lower end surfaces of a plurality of the second diagonal support rods are connected to the upper outer wall of the central column, and each of the four extension frames is connected to a hydraulic jack.

[0011] Preferably, each of the pile stabilizing and limiting sleeves is connected to the bottom frame via a stiffening plate and a plurality of rods.

[0012] Preferably, the connections between the plurality of first connecting rods, the plurality of second connecting rods and the plurality of first diagonal bracing rods and the upper frame, the lower frame and the central column are all welded connections.

[0013] Preferably, the extension frame is connected to the top frame by welding, and the second diagonal support rod is connected to the top frame, the extension frame and the central column by welding.

[0014] Preferably, the stiffening plate and the rod are connected to the pile stabilizing limiting sleeve and the bottom frame by welding.

[0015] Preferably, the suction cylinder is connected to the anti-sinking plate by welding, and the anti-sinking plate is connected to the bottom frame by welding.

[0016] The beneficial effects of the utility model are as follows: compared with the pipe frame pile stabilization platform that has been implemented in China, the single-column suction cylinder pile stabilization platform is suitable for deep sea, deep water, and sea areas with poor seabed quality. It has a reasonable design and convenient construction. It can be used for the steel pipe pile sinking construction of large truss pipe frame foundations, and has better economy and applicability in deep sea and muddy sea areas. At the same time, the overall structure is prefabricated in an onshore factory, and the overall negative pressure sinking and installation is carried out offshore. There are very few construction procedures at sea, which is convenient for construction. In addition, the suction cylinder has a relatively small sinking and jacking pressure in muddy soil, and the construction difficulty is small, which makes it convenient to transfer the pile stabilization platform to various machine positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric diagram of the utility model single-column suction tube pile stabilizing platform;

[0018] Figure 2 This is a front view of the utility model single-column suction tube pile stabilizing platform;

[0019] Figure 3 It is a top view of the bottom frame of the utility model;

[0020] Figure 4 It is a top view of the top platform of the utility model.

[0021] In the figure: 1. center column; 2. bottom frame; 3. pile stabilizing and limiting sleeve; 4. anti-sinking plate; 5. suction cylinder; 6. top platform; 21. upper frame; 22. lower frame; 23. first connecting rod; 24. second connecting rod; 25. first diagonal brace; 61. top frame; 62. extension frame; 63. second diagonal brace; 31. stiffening plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] The utility model will be further described below in conjunction with the accompanying drawings.

[0024] like Figure 1-4As shown, a single-column suction cylinder pile stabilizing platform has a total height of 57.4m. It includes a central column 1, a bottom frame 2, four pile stabilizing limiting sleeves 3, an anti-sinking plate 4, four suction cylinders 5 and a top platform 6; the lower end surface of the bottom frame 2 is connected to the anti-sinking plate 4, and the four corners of the lower end surface of the anti-sinking plate 4 are each connected to a suction cylinder 5; the four corners of the bottom frame 2 are each connected to a pile stabilizing limiting sleeve 3; the lower end of the central column 1 is connected to the bottom frame 2, and the upper end is connected to the bottom of the top platform 6. The suction cylinder 5 is welded to the anti-sinking plate 4, and the anti-sinking plate 4 is welded to the bottom frame 2.

[0025] Specifically, the central column 1 has a diameter of 4000mm and a wall thickness of 30mm; the top platform 6 and the central column 1 are connected by 16 second diagonal braces 63 with a diameter of 800mm and a wall thickness of 12mm. The bottom frame 2 adopts a double-layer truss structure with a height of 10m. The columns at the four corners have a diameter of 1.55m and a wall thickness of 14mm; the bottom frame 2 and the central column 1 are also connected by a round tube (multiple first connecting rods 23, multiple second connecting rods 24 and multiple first diagonal braces 25) with a diameter of 800mm and a wall thickness of 12mm. The center distance of the pile stabilizing limit sleeve 3 is 28m, the diameter is 3.9m, the wall thickness of the sleeve is 25mm, the height is 6m, and the bottom of the sleeve is 4m away from the top surface of the negative pressure cylinder. The center distance of the suction cylinder 5 is set to 20m, the diameter is 5m, and the height is 10m.

[0026] like Figure 1 As shown, the bottom frame 2 includes an upper frame 21, a lower frame 22, a plurality of first connecting rods 23, a plurality of second connecting rods 24, and a plurality of first diagonal bracing rods 25; the upper frame 21 is connected to the upper part of the lower frame 22, and the inner side of the upper frame 21 is connected to the lower end outer wall of the central column 1 through a plurality of first connecting rods 23; the inner side of the lower frame 22 is connected to the lower end outer wall of the central column 1 through a plurality of second connecting rods 24; the upper end of the upper frame 21 is connected to the outer wall of the central column 1 through the first diagonal bracing rod 25. The connections between the plurality of first connecting rods 23, the plurality of second connecting rods 24, and the plurality of first diagonal bracing rods 25 and the upper frame 21, the lower frame 22, and the central column 1 are all welded.

[0027] like Figure 1 , 4 As shown, the top platform 6 includes a top frame 61, four extension frames 62 and a plurality of second diagonal braces 63; the top frame 61 is connected to the upper end surface of the central column 1, and each of the four corners of the top frame 61 is connected to an extension frame 62; the lower end surfaces of the four extension frames 62 and the top frame 61 are connected to the second diagonal braces 63, and the lower end surfaces of the plurality of second diagonal braces 63 are connected to the upper outer wall of the central column 1. A hydraulic jack is connected to each of the four extension frames 62. The extension frames 62 are welded to the top frame 61, and the second diagonal braces 63 are welded to the top frame 61, the extension frames 62 and the central column 1.

[0028] like Figure 1 As shown, each pile stabilizing and limiting sleeve 3 is connected to the bottom frame 2 through a stiffening plate 31 and a plurality of rods. The stiffening plate 31 and the rods are connected to the pile stabilizing and limiting sleeve 3 and the bottom frame 2 by welding.

[0029] Specifically, considering that the foundation soil is a fluidized muddy soil with low bearing capacity, if the pipe fittings are designed to be able to enter water, according to the results of the suction tube penetration analysis, the suction tube jacket pile stabilization platform will sink to the designed elevation by its own weight, which is not conducive to the horizontal adjustment of the pile stabilization platform. Therefore, the steel pipes of the pipe fittings are all closed structures to provide sufficient buoyancy; after the pile stabilization platform sinks by its own weight, a certain suction tube height is left to sink under negative pressure to adjust the horizontality of the pile stabilization platform. During the penetration into the mud, the horizontality during the mud entry is adjusted by increasing and reducing the suction force inside the suction tube 5; the top platform 6 is arranged with a pile sinking guide dragon mouth and construction auxiliary facilities; the pile stabilization limit sleeve 3 is used for steel pipe pile positioning and verticality control. The anti-sinking plate 4 structure adopts an inverted beam arrangement, and the beam system is composed of the jacket horizontal support and H-shaped steel. The flat plate is located below the beam system. The flat plate elevation is consistent with the elevation of the suction tube 5 tube top cover, and both are in contact with the mud surface. The anti-sinking plate 4 can provide basic bearing capacity and ensure the stability of the platform.

[0030] Specifically, when in use, the pile stabilizing platform is hoisted into the water, and the floating hoist is used to hoist the pile stabilizing platform. After the bottom of the suction cylinder 5 contacts the water surface, the lowering speed is slowed down, so that the suction cylinder 5 has sufficient time to release the air in the cylinder; after the top of the cylinder enters the water, check the sealing of the cylinder top valve and the manhole cover; continue to lower, keep in touch with the crane driver during the process, determine the initial entry into the mud, and monitor the level. As the pile stabilizing platform is lowered, the cables and pipelines are placed into the water to avoid tension or scratching with obstacles on the deck. A jack is connected to each of the four corners of the top platform 6, and its own level is adjusted by the extension and contraction of the jack before hoisting into the mud. After the suction cylinder 5 is lowered to the mud surface, it is allowed to sink into the mud by its own weight. During the process, the angle and level of the pile stabilizing platform are monitored in real time and adjusted within the allowable range; the speed of the suction cylinder 5 entering the mud is strictly controlled so that the sinking speed is not more than 3m / h; when the weight of the crane is 30T, it is considered that the self-weight entry into the mud is completed, and the 30T lifting weight is maintained to ensure the horizontality of the structure during the initial penetration. It is left to stand for 2 hours to ensure the formation of the pile-soil sealing conditions that can be sucked and sunk. After the self-weight entry into the mud is completed, the penetration system is started and the penetration operation begins. The air inside the suction cylinder 5 is sucked. During the initial process, the crane maintains a lifting force of 30T. During the penetration process, the level, penetration depth, and pressure difference parameters inside and outside the cylinder are monitored and recorded according to the measurement and control equipment; the sinking speed is strictly controlled during the suction cylinder penetration process, and the sinking speed is not more than 3m / h, and the mud entry depth of each suction cylinder is observed in real time. During the penetration into the mud, the levelness at the time of entering the mud is adjusted by increasing and reducing the suction force inside the suction cylinder 5. If the levelness is close to the limit of the design requirement, according to the actual inclination, the installation equipment measurement and control system is operated to adjust the levelness so that the levelness returns to the design value, and then the penetration is restarted until the levelness of the guide frame sunk in place is within the design allowable range. During the penetration process, communicate with the platform level measurement personnel in real time to keep the installation platform level consistent with the professional measurement level. During the penetration process, monitor the penetration depth in real time, communicate with the platform elevation measurement personnel in real time, and shut down the penetration system after the penetration depth of the pile stabilization platform reaches the design elevation.

[0031] During the penetration process, the depth of the pile barrel into the mud, the pressure difference between the inside and outside of the barrel, and the structural inclination are measured and monitored in real time, and tracked and compared with the limit values ​​such as the negative pressure inside the barrel required by the design. Ensure that the pressure difference between the inside and outside of the barrel does not exceed the design analysis limit value to prevent the buckling of the negative pressure barrel and the formation of pipe bursts. Adjust the installation elevation. During the penetration process, the penetration depth should be monitored in real time, and communication with the platform elevation measurement personnel should be carried out in real time to keep the installation platform elevation consistent with the professional measurement results. Four steel pipe piles are hoisted and placed in four pile stabilization limit sleeves 3 respectively; special equipment is used to sink the steel pipe piles, and the operation is stopped after reaching the design elevation. The crane pulls up the pile stabilization platform and goes to the next pile sinking position to carry out pile sinking construction at the next position.

[0032] Compared with the jacket pile stabilization platform that has been implemented in China, this single-column suction tube pile stabilization platform is suitable for deep sea, deep water, and sea areas with poor seabed quality. It has a reasonable design and convenient construction. It can be used for the steel pipe pile sinking construction of large truss jacket foundations. It has better economy and applicability in deep sea and muddy sea areas. At the same time, the overall structure is prefabricated in the onshore factory, and the overall negative pressure sinking and installation is carried out offshore. There are few construction procedures at sea, which is convenient for construction. In addition, the suction tube has a relatively small sinking and jacking pressure in muddy soil, and the construction difficulty is small, which makes it easy to transfer the pile stabilization platform to various positions.

[0033] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A single-column suction tube pile stabilization platform, characterized in that: It comprises a central column (1), a bottom frame (2), four pile stabilizing limit sleeves (3), an anti-sinking plate (4), four suction cylinders (5) and a top platform (6); The lower end surface of the bottom frame (2) is connected to the anti-sinking plate (4), and each of the four corners of the lower end surface of the anti-sinking plate (4) is connected to a suction cylinder (5); each of the four corners of the bottom frame (2) is connected to a pile stabilizing limiting sleeve (3); the lower end of the central column (1) is connected inside the bottom frame (2), and the upper end is connected to the bottom of the top platform (6).

2. The single-column suction cylinder pile stabilizing platform according to claim 1 is characterized in that: The bottom frame (2) comprises an upper frame (21), a lower frame (22), a plurality of first connecting rods (23), a plurality of second connecting rods (24) and a plurality of first diagonal bracing rods (25); The upper frame (21) is connected to the upper part of the lower frame (22); the inner side of the upper frame (21) is connected to the lower outer wall of the central column (1) via a plurality of the first connecting rods (23); the inner side of the lower frame (22) is connected to the lower outer wall of the central column (1) via a plurality of the second connecting rods (24); the upper end of the upper frame (21) is connected to the outer wall of the central column (1) via the first diagonal bracing rod (25).

3. The single-column suction cylinder pile stabilization platform according to claim 1 is characterized in that: The top platform (6) comprises a top frame (61), four extension frames (62) and a plurality of second diagonal bracing rods (63); the top frame (61) is connected to the upper end surface of the central column (1), and each of the four corners of the top frame (61) is connected to an extension frame (62); the lower end surfaces of the four extension frames (62) and the top frame (61) are connected to the second diagonal bracing rod (63), and the lower end surfaces of the plurality of second diagonal bracing rods (63) are connected to the upper outer wall of the central column (1); and each of the four extension frames (62) is connected to a hydraulic jack.

4. The single-column suction tube pile stabilization platform according to claim 1 is characterized in that: Each of the pile stabilizing and limiting sleeves (3) is connected to the bottom frame (2) via a stiffening plate (31) and a plurality of rods.

5. The single-column suction cylinder pile stabilizing platform according to claim 2 is characterized in that: The connections between the plurality of first connecting rods (23), the plurality of second connecting rods (24) and the plurality of first diagonal bracing rods (25) and the upper frame (21), the lower frame (22) and the central column (1) are all welded connections.

6. The single-column suction tube pile stabilization platform according to claim 3 is characterized in that: The extension frame (62) is connected to the top frame (61) by welding, and the second diagonal support rod (63) is connected to the top frame (61), the extension frame (62) and the central column (1) by welding.

7. The single-column suction tube pile stabilization platform according to claim 4 is characterized in that: The stiffening plate (31) and the rod are all connected to the pile stabilizing limiting sleeve (3) and the bottom frame (2) by welding.

8. The single-column suction cylinder pile stabilization platform according to claim 1 is characterized in that: The suction cylinder (5) is connected to the anti-sinking plate (4) by welding, and the anti-sinking plate (4) is connected to the bottom frame (2) by welding.

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