Ultra-long large-diameter pile foundation water operation platform unit, operation platform and construction method

Abstract

The application belongs to the technical field of pile foundation construction in water. A kind of super-long large-diameter pile foundation water operation platform unit is disclosed, including support cylinder and cantilever positioning guide frame, guide assembly is arranged on the cantilever positioning guide frame, the guide assembly is used to limit the radial support of the support cylinder, support assembly is arranged on the support cylinder, and the support assembly is used to support the cantilever positioning guide frame. A kind of super-long large-diameter pile foundation water operation platform and construction method are also disclosed. The overall arrangement of the present application is reasonable, which can effectively solve the problems existing in the construction of the existing super-long large-diameter pile foundation operation platform, improve the stability and construction efficiency of the structure, realize modular arrangement, and be more convenient for construction and control of structural stability.

Description

Technical Field

[0001] This invention belongs to the field of underwater pile foundation construction technology, specifically relating to an underwater operation platform unit for ultra-long diameter pile foundations, the operation platform, and the construction method. Background Technology

[0002] As the load-bearing structure of a bridge, pile foundations bear the entire load of the superstructure. Steel pipe piles or bored piles, as a commonly used form of deep foundation, are widely used in bridge pile foundation construction due to their high bearing capacity, especially in underwater engineering. For underwater pile foundation construction, platforms or cofferdams are typically erected on a horizontal surface before pile foundation work begins. These methods are highly reliable, ensuring the safety and quality of pile foundation work; however, they generally have disadvantages such as large workload, long construction period, and significant impact on the aquatic environment from cofferdam construction. Currently, large floating cranes or piling vessels are also used to assist in bridge pile foundation construction, but these are unsuitable for some enclosed water areas and are costly. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems and shortcomings by providing an underwater working platform unit, working platform, and construction method for ultra-long and long diameter pile foundations. Its overall layout is reasonable, which can effectively solve the problems existing in the construction of existing ultra-long and long diameter pile foundation working platforms, improve the stability of the structure and construction efficiency, realize modular layout, and facilitate construction and control of structural stability.

[0004] To achieve the above objectives, the technical solution adopted is:

[0005] A unit for an ultra-long diameter pile foundation underwater working platform includes:

[0006] Support cylinder; and

[0007] A cantilever positioning guide frame is provided with a guide assembly, which is used to provide radial limiting support for the support cylinder; a support assembly is provided on the support cylinder, which is used to support the cantilever positioning guide frame.

[0008] According to the ultra-long diameter pile foundation underwater operation platform unit of the present invention, preferably, the guiding component includes:

[0009] Power push rods, multiple sets of said power push rods are arranged on the cantilever positioning guide frame; and

[0010] Guide rollers are evenly distributed at the ends of each of the power push rods, and each of the guide rollers is fitted and supported in close contact with the support cylinder.

[0011] According to the present invention, the underwater operation platform unit for ultra-long diameter pile foundations is preferably provided in the following way: the power push rod is a jack or a hydraulic cylinder, the power push rod is inclinedly arranged on the cantilever positioning guide frame, and two sets of corresponding upper and lower power push rods are arranged on the cantilever positioning guide frame, each set of power push rods including at least four power push rods; the support cylinder is a steel casing or a steel pipe pile.

[0012] According to the ultra-long diameter pile foundation underwater operation platform unit of the present invention, preferably, the cantilever positioning guide frame includes:

[0013] Guide frame, the guide frame having a U-shaped structure; and

[0014] A locking rod is provided at the U-shaped opening of the guide frame, and a limit nut is provided on each of the corresponding locking rods on both sides of the side wall of the guide frame.

[0015] According to the ultra-long diameter pile foundation underwater operation platform unit of the present invention, preferably, the support component includes a support block fixedly disposed on the support cylinder, the support block supporting the lower part of the cantilever positioning guide frame, or the support block supporting the lower part of the guide component.

[0016] An ultra-long diameter pile foundation underwater working platform includes:

[0017] As mentioned above, multiple sets of the ultra-long diameter pile foundation underwater operation platform units are deployed in the water.

[0018] An extension platform frame, positioned between two adjacent ultra-long diameter pile foundation underwater working platform units, is fixedly connected to at least one of the adjacent ultra-long diameter pile foundation underwater working platform units; and

[0019] A reinforcing link assembly is provided, with reinforcing link assemblies evenly distributed between two adjacent support cylinders.

[0020] According to the present invention, for an ultra-long diameter pile foundation underwater working platform, preferably, the reinforcing link assembly includes:

[0021] Linkages; and

[0022] An arc-shaped clamp is fixedly mounted on the support cylinder. A connecting lug is provided on the arc-shaped clamp, and the ends of the connecting rods are all connected to the corresponding connecting lugs on the arc-shaped clamp.

[0023] Multiple connecting rods are provided between the two supporting cylinders, and the connecting rods are arranged in parallel or / and cross each other.

[0024] According to the present invention, for an ultra-long diameter pile foundation underwater working platform, preferably, limit blocks are provided on the upper and lower supporting cylinders of each of the arc-shaped clamps, connecting rings are provided at both ends of the connecting rod, connecting ring ribs are provided on the connecting rings, and ear ring ribs are provided on the connecting ears, the connecting ring ribs and ear ring ribs are correspondingly engaged; it also includes a mud tank, the mud tank is suspended at the lower part of the extension platform frame and / or the cantilever positioning guide frame, the mud tank is provided with a partition, a mud pump and a mud conveying pipe; the upper part of the extension platform frame and the cantilever positioning guide frame is covered with wooden pads and support plates.

[0025] A construction method for an ultra-long diameter pile foundation underwater working platform, the construction of which specifically includes the following steps:

[0026] a. Construct an auxiliary platform above the water surface, with the auxiliary platform independently supported on the riverbed;

[0027] b. Using the auxiliary platform as the initial working surface, install the first section of the cantilever positioning guide frame, and arrange the support cylinder in the middle of the cantilever positioning guide frame. The cantilever positioning guide frame is fixed on the auxiliary platform. After the cantilever positioning guide frame is installed in place, adjust the guide components on the cantilever positioning guide frame so that the support cylinder is in a vertical state.

[0028] c. Using an auxiliary platform, drive the support cylinder into the riverbed, and the guide assembly positions the support cylinder. After the support cylinder is driven into place, the cantilever positioning guide frame is supported and set on the support cylinder by the support assembly.

[0029] d. Using the stable cantilever positioning guide frame, fix and install the next segment of the cantilever positioning guide frame; repeat step b to complete the adjustment of the cantilever positioning guide frame and support cylinder of this segment; repeat step c to drive the support cylinder into the riverbed and support the cantilever positioning guide frame of this segment through the support components.

[0030] e. Install reinforcing connecting rod assemblies between two adjacent supporting cylinders to improve the stability of the structure;

[0031] f. Repeat steps d and e to erect the working platform based on the cantilever positioning guide frame and support cylinder in the ultra-long diameter pile foundation underwater working platform unit.

[0032] According to the construction method of the ultra-long diameter pile foundation underwater operation platform of the present invention, preferably, in step d, the extension platform frame is first laid based on the cantilever positioning guide frame that is supported and positioned, and then the next segment of the cantilever positioning guide frame is installed and fixed based on the extension platform frame; in step e, a multi-stage mud pit is suspended below the erected cantilever positioning guide frame.

[0033] The beneficial effects achieved by adopting the above technical solution are:

[0034] The overall layout of this application is reasonable and can effectively solve the problems existing in the construction of ultra-long diameter pile foundation operation platforms, improve the stability of the structure and construction efficiency, realize modular layout, and make it easier to carry out construction and control the stability of the structure.

[0035] The guide component of this application provides stable and reliable positioning and guidance for the implantation of the support cylinder by setting point-contact guide jacks on the cantilever positioning guide frame, thereby improving the implantation accuracy of the support cylinder and ensuring the support capacity and stability of the overall structure of the work platform for subsequent construction. This application adopts a modular assembly structure, which is more convenient for efficient operation, greatly reduces the risk and procedures of the operation, and makes the entire construction process easier to control, ensuring construction quality and efficiency.

[0036] After the support cylinder is implanted and positioned, this application sets up a support assembly to complete the support of the cantilever positioning guide frame. By setting a wedge-shaped support on the support cylinder and a point-contact guide jack supporting the wedge-shaped support, the cantilever positioning guide frame is supported by the support cylinder and a construction work platform is set up, which makes the overall assembly simpler, the whole modular assembly has fewer parts, makes it easier to control the accuracy and quality of construction, and has higher reliability.

[0037] The underwater working platform for ultra-long diameter pile foundations in this application adopts a modular layout construction. At the same time, the cantilever positioning guide frame also adopts a modular splicing process. After the support cylinder is implanted into place, it serves as a support and locks in place. Then, the next segment of the cantilever positioning guide frame is extended forward, so that the overall construction can be carried out step by step. This application also uses a reinforced connecting rod assembly to connect and fix adjacent support cylinders, further improving the stability of the steel casing or steel pipe pile.

[0038] This application also reduces the space occupied by the mud pit by suspending it below the platform, thereby improving construction efficiency. It fully utilizes the platform's space, achieving rational zoning and facilitating subsequent construction operations. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0040] Figure 1 This is a structural schematic diagram of a cantilever positioning guide frame according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of a point-contact guide jack according to an embodiment of the present invention;

[0042] Figure 3 This is a three-dimensional structural schematic diagram of a point-contact guide jack according to an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the working state of the cantilever positioning guide frame according to an embodiment of the present invention;

[0044] Figure 5 This is a side view of the working structure of the cantilever positioning guide frame according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the locking structure of the cantilever positioning guide frame according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of an auxiliary platform structure based on a steel casing and a cantilever positioning guide frame, according to an embodiment of the present invention.

[0047] Figure 8 This is a schematic diagram of the planar structure of the auxiliary platform based on the support cylinder and the cantilever positioning guide frame according to an embodiment of the present invention;

[0048] Figure 9 This is a schematic diagram of the horizontal connection structure of the support cylinder according to an embodiment of the present invention;

[0049] Figure 10 This is a schematic diagram of the three-dimensional structure of the connecting rod according to an embodiment of the present invention;

[0050] Figure 11 This is a schematic diagram of the connecting rod assembly structure according to an embodiment of the present invention;

[0051] Figure 12 This is a three-dimensional structural schematic diagram of the arc-shaped clamp according to an embodiment of the present invention;

[0052] Figure 13 This is a schematic diagram of the structure of the arc-shaped clamp installed on the support cylinder according to an embodiment of the present invention.

[0053] Number in the diagram:

[0054] 1-Riverbed, 11-Water Surface, 2-Auxiliary Platform, 21-Vertical Support, 22-Connecting Beam, 23-Support, 24-Bailey Beam, 25-Square Timber Pad, 26-Support Plate, 3-Cantilever Positioning Guide Frame, 31-Bailey Beam Support, 32-Lock Tie Rod, 33-Limit Nut, 34-Point Contact Guide Jack, 35-Roller Support, 36-Bearing, 37-Guide Roller, 41-Pile Cap, 42-Steel Casing, 43- - Steel pipe pile, 44- Wedge support, 45- Extension platform frame, 6- Connecting rod, 61- Connecting ring, 62- Connecting ring rib, 63- First bolt, 64- Second bolt, 71- Arc-shaped clamp, 72- Connecting wing plate, 73- Bolt hole, 74- Third bolt, 75- Connecting ear, 76- Ear ring rib, 77- Limiting block, 8- Multi-stage mud pit, 81- Partition plate, 82- Lifting rope, 83- Mud pump, 84- Mud conveying pipe. Detailed Implementation

[0055] The exemplary solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art.

[0056] In the description of this invention, it should be understood that the terms "first" and "second" are used to describe the various elements of this invention and do not indicate any limitation on order, quantity or importance, but are only used to distinguish one component from another.

[0057] It should be noted that when one element is described as "connected," "coupled," or "connected" to another element, it can mean that they are directly connected, coupled, or connected. However, it should be understood that there may be intermediate elements between them; that is, it covers both direct and indirect connection positions.

[0058] It should be noted that the use of words such as "one" or "a" does not necessarily indicate a quantity limitation. Words such as "including" or "contains" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0059] It should be noted that terms such as "up," "down," "left," and "right," which indicate orientation or positional relationship, are only used to express relative positional relationship. They are used for the convenience of describing the present invention and do not mean that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0060] See Figures 1-13This application discloses a unit for an ultra-long diameter pile foundation underwater operating platform, including a support cylinder and a cantilever positioning guide frame 3. The support cylinder can be a steel casing 42 or a steel pipe pile 43. To ensure that the support cylinder can achieve good adjustment and guidance relative to the cantilever positioning guide frame 3, this application provides a guide component on the cantilever positioning guide frame 3. The guide component is used to provide radial limiting support for the support cylinder, so that the support cylinder remains vertical when driven into the riverbed. A support component is also provided on the support cylinder to support the cantilever positioning guide frame 3. That is, when the support cylinder is driven into the riverbed, the support cylinder supports the cantilever positioning guide frame 3, thereby forming a unit module of the operating platform with good structural stability.

[0061] Preferably, the cantilever positioning guide frame in this embodiment includes a guide frame body and a locking tie rod 32. The guide frame body has a U-shaped structure. The locking tie rod is located at the U-shaped opening of the guide frame body, and a limit nut 33 is provided on each of the corresponding locking tie rods on both sides of the side wall of the guide frame body. The guiding component of this application includes a power push rod and guide rollers 37. Multiple sets of the power push rods are arranged on the cantilever positioning guide frame 3. Guide rollers 37 are evenly distributed at the ends of each power push rod, and each guide roller 37 is fitted and supported against the support cylinder. The power push rod is a jack or a hydraulic cylinder. Preferably, the power push rod in this application is a point-contact guide jack 34. The power push rod is inclined on the cantilever positioning guide frame 3. Two sets of vertically corresponding power push rods are arranged on the cantilever positioning guide frame 3, and each set of power push rods includes at least four power push rods. The support component of this application includes a support block fixedly mounted on the support cylinder, the support block supporting the lower part of the cantilever positioning guide frame, or the support block supporting the lower part of the guide component.

[0062] The above structure will be further explained in detail in terms of its arrangement and connection methods in practical applications, as shown in the appendix. Figure 1 As shown, the guide frame of the cantilever positioning guide frame 3 of this application is a Bailey beam support 31. The Bailey beam support 31 is spliced ​​from Bailey beams 24 and has an "open" structure in plan. A locking rod 32 and a limiting nut 33 are provided on the open side. The locking rod 32 and the limiting nut 33 are used to assist in fixing the "open" Bailey beam support 31 and strengthen the overall strength of the structure. In the initial stage, the cantilever positioning guide frame 3 is installed on the auxiliary platform, and the support cylinder is implanted into the riverbed 1 by the cantilever positioning guide frame 3. After the support cylinder is installed in place, a support block is welded on the support cylinder. Here, in order to cooperate with the point-contact guide jack, a wedge-shaped support 44 is used as the support block. The wedge-shaped support 44 is in close contact with the point-contact guide jack 34. After the support cylinder is implanted in place, the cantilever positioning guide frame 3 is stably supported on the support cylinder by the point-contact guide jack 34 and the wedge-shaped support 44.

[0063] As attached Figure 2 Appendix Figure 3 As shown, the point-contact guide jack 34 is fixed to the Bailey beam support 31; the support cylinder is driven into the riverbed 1 along the constraint of the cantilever positioning guide frame 3; the end of the point-contact guide jack 34 has a guide roller 37, which is fixed to the end of the point-contact guide jack 34 by a roller bracket 35 and a bearing 36. The guide roller 37 is in close contact with the outer surface of the support cylinder to assist in guiding and positioning the support cylinder during implantation. Simultaneously, after the support cylinder is implanted in place, a wedge-shaped support 44 welded to the support cylinder is attached, as shown in the attached diagram. Figure 6 As shown.

[0064] This application also discloses an ultra-long diameter pile foundation underwater working platform, including the ultra-long diameter pile foundation underwater working platform unit as described above, an extension platform frame, and a reinforcing link assembly. Multiple sets of the ultra-long diameter pile foundation underwater working platform units are arranged in the water; the extension platform frame is arranged between two adjacent ultra-long diameter pile foundation underwater working platform units, and the extension platform frame is fixedly connected to at least one of the adjacent ultra-long diameter pile foundation underwater working platform units; reinforcing link assemblies are evenly distributed between two adjacent support cylinders.

[0065] The reinforcing linkage assembly includes connecting rods and arc-shaped clamps. The arc-shaped clamps are fixedly mounted on the support cylinder and have connecting ears. The ends of the connecting rods are connected to the corresponding connecting ears on the arc-shaped clamps. Multiple connecting rods are arranged between the two support cylinders, and the connecting rods are arranged in parallel or / and cross-shaped arrangements. Limiting blocks are provided on the support cylinders on both the upper and lower sides of each arc-shaped clamp. The assembly also includes a mud tank, which is suspended below the extension platform frame and / or the cantilever positioning guide frame. The mud tank contains a partition, a mud pump, and a mud conveying pipe. The upper part of the extension platform frame and the cantilever positioning guide frame is covered with wooden pads and support plates.

[0066] As attached Figure 7 Appendix Figure 8 As shown, the extension platform frame 45 is erected on the cantilever positioning guide frame 3; the extension platform frame 45 is erected on the cantilever positioning guide frame 3 and square wooden blocks 25 and support plates 26 are laid on it. The extension platform frame 45 serves as the installation platform for the next segment of the cantilever positioning guide frame 3 and the implantation guide platform for the next support cylinder. Since the support cylinder uses steel casing or steel pipe piles, pile caps 41 are set on the support cylinder for easy operation, so that the corresponding steel casing or steel pipe piles can be driven into the riverbed 1 by the pile driver.

[0067] As attached Figure 9As shown, the connecting rod 6 is positioned between two installed support cylinders. The connecting rod 6 is connected to an arc-shaped clamp 71, which is installed on the support cylinder. The arc-shaped clamp 71 is semi-circular, with connecting wing plates 72 on both sides. The connecting wing plates 72 have bolt holes 73, and a third bolt 74 passes through the bolt holes 73 to combine the two arc-shaped clamps 71 into a closed ring, which is then installed on the support cylinder. The arc-shaped clamp 71 has connecting ears 75, with radially arranged earring ribs 76 on the connecting ears 75. The steel casing 42 or steel pipe pile 43 has a limiting block 77, which is in close contact with the upper and lower ends of the arc-shaped clamp 71 to prevent the arc-shaped clamp 71 from sliding up and down along the steel casing 42 or steel pipe pile 43.

[0068] As attached Figure 10 Appendix Figure 11 As shown, the connecting rod 6 has a connecting ring 61 at its end and middle, and the connecting ring 61 has radial connecting ring ribs 62; the end of the connecting rod 6 is connected to the arc-shaped clamp 71, and the second bolt 64 passes through the connecting ring 61 and the connecting lug 75 at the end, and the connecting ring ribs 62 and the lug ribs 76 interlock with each other; the connecting rods 6 cross each other, and the first bolt 63 passes through the connecting ring 61 in the middle of the connecting rod 6, and the connecting ring ribs 62 on the connecting ring 61 interlock with each other; the connecting ring ribs 62 and the lug ribs 76 can effectively prevent the rods from rotating after connection, improve the firmness of the rod connection, and thus indirectly improve the stability of the steel casing 42 or the steel pipe pile 43.

[0069] As attached Figure 7 As shown, the multi-stage mud tank 8 is suspended below the platform by a rope 82. The multi-stage mud tank 8 contains partitions 81 of different heights, a mud pump 83, and a mud conveying pipe 84. The partitions 81 divide the mud tank into multiple different multi-stage filtration spaces. The mud pump 83 and the mud conveying pipe 84 work together to transport the mud into the pile hole. By being suspended on the water surface 11 below the platform, the mud tank avoids occupying the space on the platform surface.

[0070] This application also discloses a construction method for an ultra-long diameter pile foundation underwater working platform. The construction of the aforementioned ultra-long diameter pile foundation underwater working platform specifically includes the following steps:

[0071] a. Construct an auxiliary platform above the water surface, with the platform independently supported on the riverbed; as shown in the attached document. Figure 4 Appendix Figure 5As shown, before the underwater pile foundation construction operation, an auxiliary platform 2 is erected above the water surface 11. The auxiliary platform 2 is independently supported on the riverbed 1. The auxiliary platform 2 includes vertical supports 21, connecting beams 22, supports 23, Bailey beams 24, square wooden blocks 25, and support plates 26. The connecting beams 22 are located between the vertical supports 21. The supports 23 are placed on top of the vertical supports 21. The Bailey beams 24 are supported on the supports 23. The square wooden blocks 25 are supported on the Bailey beams 24. The support plates 26 are laid on the square wooden blocks 25. The auxiliary platform 2 serves as the starting platform for the underwater pile foundation construction. The first section of the cantilever positioning guide frame 3 is installed attached to the auxiliary platform 2.

[0072] b. Using the auxiliary platform as the initial working surface, install the first section of the cantilever positioning guide frame, and arrange the support cylinder in the middle of the cantilever positioning guide frame. The cantilever positioning guide frame is fixed to the auxiliary platform. After the cantilever positioning guide frame is installed in place, adjust the guide components on the cantilever positioning guide frame to make the support cylinder vertical. Specifically, adjust the extension and retraction of each point-contact guide jack in the guide components, so that the guide rollers support and adjust the support cylinder, thereby keeping the support cylinder vertical, so as to have better stability and bear greater force after being implanted into the riverbed.

[0073] c. Using an auxiliary platform, the support cylinder is driven into the riverbed, and the guide assembly positions the support cylinder. After the support cylinder is in place, the cantilever positioning guide frame is supported and mounted on the support cylinder by the support assembly; as shown in the attached diagram. Figure 4 Appendix Figure 5 As shown, steel casings 42 or steel pipe piles 43 are driven into the riverbed 1 using the auxiliary platform 2. Point-contact guide jacks 34 position the steel casings 42 or steel pipe piles 43. After the steel casings 42 or steel pipe piles 43 are in place, wedge-shaped supports 44 are welded to the side walls of the steel casings 42 or steel pipe piles 43. The wedge-shaped supports 44 are tightly attached to the lower side of the point-contact guide jacks 34. The cantilever positioning guide frame 3 is supported on the wedge-shaped supports 44 on the side walls of the steel casings 42 or steel pipe piles 43 by the point-contact guide jacks 34. The steel casings 42 or steel pipe piles 43 have pile caps 41, and the steel casings 42 or steel pipe piles 43 are driven into the riverbed 1 using a pile driver. (See attached diagram) Figure 6 As shown, the wedge-shaped support 44 is closely attached to the point-contact guide jack 34; after the steel casing 42 or steel pipe pile 43 is implanted and positioned, the cantilever positioning guide frame 3 is supported on the steel casing 42 or steel pipe pile 43 by the point-contact guide jack 34.

[0074] d. Using the stable cantilever positioning guide frame, fix and install the next segment of the cantilever positioning guide frame; repeat step b to complete the adjustment of the cantilever positioning guide frame and support cylinder of this segment; repeat step c to drive the support cylinder into the riverbed and support the cantilever positioning guide frame of this segment through the support components.

[0075] In step d, as shown in the appendix Figure 7 As shown, an extension platform frame can be laid first, relying on the cantilever positioning guide frame that is already in place. Then, the next segment of the cantilever positioning guide frame is installed and fixed on the extension platform frame. Specifically, the extension platform frame 45 is laid on the cantilever positioning guide frame 3 that is already in place. The extension platform frame 45 rests on the cantilever positioning guide frame 3 and is erected with square wooden blocks 25 and support plates 26. The extension platform frame 45 serves as the installation platform for the next segment of the cantilever positioning guide frame 3 and as the guide platform for the implantation of the next steel casing 42 or steel pipe pile 43. (See attached diagram) Figure 7 Appendix Figure 8 As shown, relying on the extension platform frame 45, the next segment of the cantilever positioning guide frame 3 is installed. The cantilever positioning guide frame 3 is fixedly installed on the extension platform frame, and the point-contact guide jack 34 is adjusted according to the method described in step b. Using the extension platform frame 45 as the working platform, steel casing 42 or steel pipe piles 43 are driven into the riverbed 1 according to the method described in step c, and the cantilever positioning guide frame 3 is supported on the wedge-shaped support 44 on the steel casing 42 or steel pipe pile 43.

[0076] e. Install reinforcing connecting rod assemblies between two adjacent supporting cylinders to improve the stability of the structure;

[0077] f. Repeat steps d and e to erect the working platform based on the cantilever positioning guide frame and support cylinder in the ultra-long diameter pile foundation underwater working platform unit.

[0078] In step e, multi-stage mud pits can be suspended below the erected cantilever positioning guide frame.

[0079] In this article, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this article generally indicates that the preceding and following objects have an "or" relationship.

[0080] The preferred embodiments for implementing the present invention have been described in detail above. However, it should be understood that these embodiments are merely illustrative and not intended to limit the scope, application, or construction of the invention in any way. The scope of protection of the present invention is defined by the appended claims and their equivalents. Those skilled in the art can make numerous modifications to the foregoing embodiments under the teachings of this invention, and all such modifications fall within the scope of protection of this invention.

Claims

1. A long-diameter pile foundation underwater working platform, characterized in that, It includes an ultra-long diameter pile foundation underwater operation platform unit, multiple sets of the ultra-long diameter pile foundation underwater operation platform units are arranged in the water, and an extension platform frame is arranged between two adjacent ultra-long diameter pile foundation underwater operation platform units. The extension platform frame is fixedly connected to at least one of the adjacent ultra-long diameter pile foundation underwater operation platform units. The platform unit includes: a support cylinder; and a cantilever positioning guide frame, on which a guide component is provided for radial limiting support of the support cylinder; and a support component is provided on the support cylinder for supporting the cantilever positioning guide frame. The working platform also includes reinforcing link assemblies, which are evenly distributed between two adjacent support cylinders; The reinforcing link assembly includes: a link; and an arc-shaped clamp, which is fixedly mounted on the support cylinder. A connecting lug is provided on the arc-shaped clamp, and the ends of the link are all connected to the connecting lugs on the corresponding arc-shaped clamps. Multiple linking rods are provided between the two support cylinders, and the linking rods are arranged in parallel or / and cross-arranged. Limiting blocks are provided on the upper and lower supporting cylinders of each of the arc-shaped clamps. Connecting rings are provided at both ends of the connecting rod. Connecting ring ribs are provided on the connecting rings. Earring ribs are provided on the connecting ears. The connecting ring ribs and earring ribs are engaged with each other. The system also includes a mud tank, which is suspended at the lower part of the extension platform frame and / or the cantilever positioning guide frame. The mud tank is equipped with a partition, a mud pump and a mud conveying pipe. Wooden pads and support plates are laid on the upper part of the extension platform frame and the cantilever positioning guide frame.

2. The underwater working platform for ultra-long diameter pile foundations according to claim 1, characterized in that, The guiding component includes: Power push rods, multiple sets of said power push rods are arranged on the cantilever positioning guide frame; and Guide rollers are evenly distributed at the ends of each of the power push rods, and each of the guide rollers is fitted and supported in close contact with the support cylinder.

3. The underwater working platform for ultra-long diameter pile foundations according to claim 2, characterized in that, The power push rod is a jack or a hydraulic cylinder, and the power push rod is inclinedly mounted on the cantilever positioning guide frame. Two sets of power push rods are arranged on the cantilever positioning guide frame, with each set of power push rods including at least four power push rods. The support cylinder is a steel casing or a steel pipe pile.

4. The underwater working platform for ultra-long diameter pile foundations according to claim 1, characterized in that, The cantilever positioning guide frame includes: Guide frame, the guide frame having a U-shaped structure; and A locking rod is provided at the U-shaped opening of the guide frame, and a limit nut is provided on each locking rod on both sides of the side wall of the guide frame.

5. The underwater working platform for ultra-long diameter pile foundations according to claim 1, characterized in that, The support assembly includes a support block fixedly mounted on the support cylinder, the support block supporting the lower part of the cantilever positioning guide frame, or the support block supporting the lower part of the guide assembly.

6. A construction method for an underwater working platform with ultra-long diameter pile foundations, characterized in that, The construction of the underwater working platform for ultra-long diameter pile foundations as described in any one of claims 1-5 specifically includes the following steps: a. Construct an auxiliary platform above the water surface, with the auxiliary platform independently supported on the riverbed; b. Using the auxiliary platform as the initial working surface, install the first section of the cantilever positioning guide frame, and arrange the support cylinder in the middle of the cantilever positioning guide frame. The cantilever positioning guide frame is fixed on the auxiliary platform. After the cantilever positioning guide frame is installed in place, adjust the guide components on the cantilever positioning guide frame so that the support cylinder is in a vertical state. c. Using an auxiliary platform, drive the support cylinder into the riverbed, and the guide assembly positions the support cylinder. After the support cylinder is driven into place, the cantilever positioning guide frame is supported and set on the support cylinder by the support assembly. d. Using the stable cantilever positioning guide frame, fix and install the next segment of the cantilever positioning guide frame; repeat step b to complete the adjustment of the cantilever positioning guide frame and support cylinder of this segment; repeat step c to drive the support cylinder into the riverbed and support the cantilever positioning guide frame of this segment through the support components. e. Install reinforcing connecting rod assemblies between two adjacent supporting cylinders to improve the stability of the structure; f. Repeat steps d and e to erect the working platform based on the cantilever positioning guide frame and support cylinder in the ultra-long diameter pile foundation underwater working platform unit.

7. The construction method for the underwater working platform for ultra-long diameter pile foundations according to claim 6, characterized in that, In step d, the extended platform frame is first laid based on the cantilever positioning guide frame that is supported and in place, and then the next segment of the cantilever positioning guide frame is installed and fixed based on the extended platform frame; in step e, a multi-stage mud pit is suspended below the erected cantilever positioning guide frame.

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