Underwater parallel connection construction device for steel pipe piles and construction method thereof

Abstract

The present invention discloses an underwater parallel connection construction device for steel pipe piles and a construction method thereof, which realizes the installation of underwater parallel connection on land, greatly reducing the difficulty of installation and disassembly. The force of the entire device structure is clearly borne, the tension of the parallel connection is borne by the steel wire rope and the temporary fixed connection between the first steel pipe and the second steel pipe, and the pressure of the parallel connection is resisted by the first steel pipe, thereby eliminating the safety hazards of underwater operation. The construction process of the device is relatively small and the operation is simple, underwater operation is avoided, and there is no need to invest in large-scale lifting equipment, which can significantly reduce construction costs. At the same time, it effectively solves the problem of excessive bending moment at the bottom of the steel pipe pile, and can optimize the steel pipe pile and the upper parallel connection structure, further reducing construction costs. The device and the corresponding construction method have a wide range of applications, and are particularly suitable for terrain with wide beaches on both sides and low original ground, or for accidental situations where the water level rises beyond the design estimate during the construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge main beam construction, and more particularly to a device for underwater parallel connection of steel pipe piles and a construction method thereof. Background Art

[0002] The foundation construction of cross-river and cross-sea bridges typically involves constructing a floating platform alongside the foundation, shifting from water-based operations to land-based ones. Overwater steel trestles are used as auxiliary pathways to connect the two sides of a river or to reach work sites on the water. With the advancement of bridge construction technology, deepwater pile foundations have become increasingly common, making the design and construction of overwater steel trestles and platforms increasingly difficult. Furthermore, the long cantilevers of steel pipe piles on deepwater platforms increase construction costs, and the pile tops are prone to significant horizontal displacement under horizontal forces, posing a safety hazard. Furthermore, as construction environments become increasingly harsh and complex, the uncertainty of water level fluctuations increases significantly. When steel pipe pile construction encounters unexpected water level rises, the actual working conditions of the steel pipe piles on the trestles and overwater platforms deviate from the designed conditions. The designed locations for the steel pipe pile connections are submerged in water, necessitating underwater welding and diving operations, significantly increasing the construction complexity.

[0003] Invention patent CN107190735A discloses a device for underwater parallel connection of steel pipe piles in deep water. After the steel pipe piles are driven, a sleeve is placed over the piles. An air-filled pressure tube is used to inflate an annular airbag within the sleeve, causing the airbag to tightly embrace the piles. Simultaneously, a grouting tube is used to inject slurry into the sleeve, filling the gap between the piles and the sleeve. While this device achieves underwater parallel connection installation, it is complex, difficult to operate, difficult to guarantee quality, and inconvenient to dismantle. The injected slurry may spill and contaminate the water. Furthermore, airbag leaks during use are difficult to detect, posing a risk of parallel connection failure. This device is particularly unsuitable for long-term projects. Summary of the Invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide an underwater parallel connection construction device and a construction method for steel pipe piles, so as to solve the technical problems in the prior art of complex installation procedures for horizontal parallel connection of steel pipe piles, inconvenient operation, and the hidden danger of parallel connection failure during steel pipe pile construction.

[0006] In order to achieve these purposes and other advantages according to the present invention, there is provided a device for underwater parallel connection of steel pipe piles, comprising:

[0007] The first paralleling mechanism includes a vertically arranged first sleeve, the inner diameter of the first sleeve being slightly larger than the outer diameter of the steel pipe pile, a first steel pipe being fixedly connected to the outer side of the first sleeve in a horizontal direction, the length of the first steel pipe being slightly smaller than the distance between the two steel pipe piles to be paralleled, and a guide device being provided on the outer side of the first sleeve;

[0008] The second parallel connection mechanism includes a second sleeve arranged vertically, the inner diameter of the second sleeve being slightly larger than the outer diameter of the steel pipe pile, a second steel pipe being fixedly connected to the outer side of the second sleeve in a horizontal direction, the second steel pipe being completely connected to the interior of the second sleeve, the inner diameter of the second steel pipe being slightly larger than the outer diameter of the first steel pipe, the first steel pipe being inserted into the interior of the second steel pipe and being temporarily fixedly connected thereto, a fixed end being provided on the outer side of the second sleeve, the fixed end and the guide device being located on the same side of the first steel pipe and at the same height;

[0009] The fastening system includes a wire rope and a tensioner. The tensioner is connected to the upper end of the steel pipe pile and is arranged in coordination with the position of the guide device. One end of the wire rope is detachably connected to the fixed end, and the other end is connected to the tensioner after passing through the guide device.

[0010] Preferably, it also includes a lowering auxiliary system, which includes a float, the buoyancy of the float in water is greater than the total weight of the underwater parallel construction device for steel pipe piles, a scale is set on the float, and a suspension line is hinged between the bottom of the float and the first steel pipe and / or the second steel pipe.

[0011] Preferably, a plurality of first slots are axially spaced apart on the side wall of the first steel pipe, and a plurality of second slots are axially spaced apart on the side wall of the second steel pipe, at least one first slot is aligned with one second slot, and steel bar clips are inserted into the aligned first slots and second slots.

[0012] Preferably, the intervals between the first notches on the first steel pipe and the intervals between the second notches on the second steel pipe are different, and a reinforcing plate is attached to the periphery of each of the first notches and the second notches.

[0013] Preferably, a diagonal brace is welded to one end of the first steel pipe close to the first sleeve, and the diagonal brace is used to connect to the corresponding crossbeam of the steel pipe pile.

[0014] Preferably, the guide device is a guide pulley, and a wire rope anti-falling device is further provided on the outer side of the guide pulley.

[0015] Preferably, two fixed ends are vertically spaced apart on the second sleeve, and one end of the steel wire rope is connected to the two fixed ends in sequence.

[0016] Preferably, the specifications and dimensions of the first sleeve and the second sleeve are the same, and the outer sides of each of the first sleeve and the second sleeve are respectively connected to one of the first steel pipe and the second steel pipe, and the outer sides of each of the first sleeve and each of the second sleeve are respectively connected to one of the fixed ends and the guide device, and the first steel pipe, the second steel pipe, the fixed end, and the guide device connected to each of the first sleeve or the second sleeve are in the same horizontal plane and are spaced 90° apart in sequence.

[0017] Preferably, a hook end is provided on the top of the steel pipe pile, and the hook end is an annular hoop fastened to the outer side of the top of the steel pipe pile, and the tensioner is connected to the hook end.

[0018] The present invention also provides a construction method for an underwater parallel connection construction device for steel pipe piles, comprising the following steps:

[0019] S1. Process the first and second parallel joints according to the size and construction interval of the steel pipe piles;

[0020] S2, driving two steel pipe piles;

[0021] S3. Nest the first steel tube and the second steel tube, align a first notch and a second notch, and insert a steel bar clamp into both to connect the first and second parallel joints into a whole to form a parallel joint main structure. Connect one end of the suspension wire to the parallel joint main structure and the other end to the pontoon.

[0022] S4. Removably connect one end of the wire rope of the fastening system to the fixed end, then pass it through the guide device and connect the other end to the tensioner in the relaxed state;

[0023] S5. Lift the parallel main structure and accurately hoist it into the designed position, ensuring that the first and second casings are inserted into the two steel pipe piles in step S2;

[0024] S6. Install a hook end on the top of the steel pipe pile inserted into the first casing, connect the tensioner to the hook end, and place the buoyancy box into the water;

[0025] S7. Slowly lower the parallel main structure, observe the scale on the pontoon, and release it from the lifting mechanism after it sinks to the predetermined scale;

[0026] S8. Use a tensioner to tighten the wire rope and reach the designed tightening force;

[0027] S9. After the construction is completed, loosen the wire rope and slowly lift the parallel main structure to the water surface for dismantling.

[0028] The present invention has at least the following beneficial effects:

[0029] (1) The structure of the underwater parallel connection construction device for steel pipe piles is clearly stressed. The tension on the parallel connection is borne by the steel wire rope and the temporary fixed connection between the first steel pipe and the second steel pipe. The pressure on the parallel connection is resisted by the first steel pipe, thereby eliminating the safety hazards of underwater operations and effectively solving the problem of excessive bending moment at the bottom of the steel pipe piles. Compared with deep-water platforms without underwater parallel connection, the horizontal displacement of the platform top can be effectively reduced, reducing the risk of later platform use.

[0030] (2) By setting up a lowering auxiliary system, the lowering position can be accurately controlled by controlling the underwater depth of the buoy and the length of the suspension line, and the entire device can be prevented from falling to the bottom of the water.

[0031] (3) The underwater parallel connection construction device and construction method for steel pipe piles of the present invention realize the installation of underwater parallel connection on land, which greatly reduces the difficulty of installation and disassembly. The construction process is relatively few and the operation is simple. Underwater operation is avoided and there is no need to invest in large-scale lifting equipment. It can optimize the steel pipe piles and the upper parallel connection structure, greatly reduce the construction cost, and has a wide range of applications. It is especially suitable for terrains with wide beaches on both sides and low original ground or accidental situations where the water level rises beyond the design estimate during the construction process.

[0032] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a main structural diagram of the first parallel connection mechanism of the present invention;

[0034] Figure 2 1 is a top view of the second parallel connection mechanism of the present invention;

[0035] Figure 3 This is a top view of a steel pipe pile underwater parallel construction device according to an embodiment of the present invention;

[0036] Figure 4 The figure is a side structural diagram of an underwater parallel connection construction device for steel pipe piles according to an embodiment of the present invention.

[0037] Explanation of the reference numerals in the accompanying drawings in the specification: 1. First parallel connection mechanism, 2. Second parallel connection mechanism, 3. Fastening system, 4. Lowering auxiliary system, 5. Steel pipe pile, 6. Lifting rope, 7. Steel bar clamp, 10. First casing, 11. First steel pipe, 12. Guide device, 13. First notch, 20. Second casing, 21. Second steel pipe, 22. Fixed end, 23. Second notch, 31. Steel wire rope, 32. Wire tensioner, 33. Hook end, 41. Float, 42. Suspension line. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0039] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0040] like Figure 1-4 As shown, the present invention provides a device for underwater parallel connection construction of steel pipe piles, comprising:

[0041] The first coupling mechanism 1 includes a vertically arranged first sleeve 10. The inner diameter of the first sleeve 10 is slightly larger than the outer diameter of the steel pipe pile 5. A first steel pipe 11 is fixedly connected to the outside of the first sleeve 10 in the horizontal direction. The length of the first steel pipe 11 is slightly smaller than the distance between the two steel pipe piles 5 to be coupled. A guide device 12 is provided on the outside of the first sleeve 10.

[0042] The second parallel connection mechanism 2 includes a vertically arranged second sleeve 20. The inner diameter of the second sleeve 20 is slightly larger than the outer diameter of the steel pipe pile 5. A second steel pipe 21 is fixedly connected to the outer side of the second sleeve 20 in the horizontal direction. The second steel pipe 21 is completely connected to the interior of the second sleeve 20. The inner diameter of the second steel pipe 21 is slightly larger than the outer diameter of the first steel pipe 11. The first steel pipe 11 penetrates into the interior of the second steel pipe 21 and is temporarily fixedly connected to each other. A fixed end 22 is provided on the outer side of the second sleeve 20. The fixed end 22 and the guide device 12 are located on the same side of the first steel pipe 11 and at the same height.

[0043] The fastening system 3 includes a wire rope 31 and a tensioner 32. The tensioner 32 is connected to the upper end of the steel pipe pile 5 and is arranged in coordination with the position of the guide device 12. One end of the wire rope 31 is detachably connected to the fixed end 22, and the other end is connected to the tensioner 32 after passing through the guide device 12.

[0044] The inner diameter of the first and second casings 10 and 20 is slightly larger than the outer diameter of the steel pipe pile 5, and the inner diameter is minimized as a premise to meet the insertion requirements of the steel pipe pile 5 with allowable accuracy deviation after construction. One side of the first casing 10 is rigidly connected to the first steel pipe 11, and a guide device 12 is installed on the other side. One side of the second casing 20 is rigidly connected to the second steel pipe 21. The second casing 20 has a through hole corresponding to the inside of the second steel pipe 21. The first steel pipe 11 is a long steel pipe, and the second steel pipe 21 is a short steel pipe. The inner diameter of the second steel pipe 21 is slightly larger than that of the first steel pipe 11. The outer diameter is 1 cm, which makes it easy for the first steel pipe 11 to be nested and installed in the second steel pipe 21 to achieve relative position movement, and pass through the through hole of the second sleeve 20 to the inside of the second steel pipe 21. The length of the first steel pipe 11 is slightly smaller than the net distance between the two steel pipe piles 5 to be paralleled by 0.5 cm, ensuring that the first steel pipe 11 can resist the horizontal pressure applied by the two steel pipe piles 5 to the first steel pipe 11 after the steel wire rope 31 of the fastening system 3 is tightened. After the second steel pipe 21 is sleeved on the first steel pipe 11, the guide device 12 and the fixed end 22 are located on the same side of the first steel pipe 11 and the height is basically the same.

[0045] The fastening system 3 can be pulled on the water by the steel wire rope 31 to realize the first casing 10 and the second casing 20 to clamp the corresponding steel pipe pile 5. The outer end of the first steel pipe 11 away from the first casing 10 is inserted into the second steel pipe 21 and then closely adheres to the steel pipe pile 5 inserted into the second casing 20, meeting the horizontal compression and tension requirements of the parallel structure. One end of the steel wire rope 31 is connected to the fixed end 22, and the traction force is adjusted from the horizontal direction to the vertical direction through the guide device 12, and then the other end of the steel wire rope 31 is connected to the fixed end 22. The wire tensioner 32 is connected and installed on the top of the steel pipe pile 5. The wire tensioner 32 is required to have functions such as convenient tightening and loosening of the wire rope 31. The traction force meets the underwater parallel force requirements, and a hook end 33 is set on the top of the steel pipe pile 5 for easy installation of the wire tensioner 32. One end of the wire tensioner 32 is conveniently connected to the wire rope 31 and the other end is conveniently connected to the hook end 33. The hook end 33 can be rigidly connected to the rigid structure above the water surface, and the structural strength, rigidity and stability are required to meet the requirements.

[0046] The specific steps for the underwater parallel connection construction device of the steel pipe pile 5 during construction are as follows:

[0047] (1) Calculate the length of the wire rope 31 and the traction force required by the fastening device in advance, and complete the first flat joint structure, the second flat joint structure, the fastening system 3 and the preparation in the back field.

[0048] (2) Drive two steel pipe piles 5 in sequence as required.

[0049] (3) On land, the first parallel connection structure and the second parallel connection structure are nested and installed through the first steel pipe 11 and the second steel pipe 21 and temporarily fixedly connected to form an integral body, namely the parallel connection main structure; one end of the steel wire rope 31 of the fastening system 3 is passed through the fixed end 22 on the second casing 20 and fixed by a shackle to achieve connection, and the direction of the steel wire rope 31 is changed by passing through the guide device 12, and the other end of the steel wire rope 31 is connected to one end of the tensioner 32 in a relaxed state.

[0050] (4) Use a crane to lift the entire parallel main structure and accurately lift it into the designed position, ensuring that the first casing 10 and the second casing 20 are respectively inserted into one of the steel pipe piles 5.

[0051] (5) The tensioner 32 is fixedly connected to the upper end of the steel pipe pile 5 corresponding to the first casing 10.

[0052] (6) Lower the crane hoisting rope 6 and slowly lower the parallel main structure until it reaches the predetermined position.

[0053] (7) Use the tensioner 32 to tighten the wire rope 31 and reach the designed tightening force.

[0054] (8) After the project is completed, loosen the wire rope 31 and use the loosened lifting rope 6 to slowly lift it to the water surface for removal.

[0055] The underwater parallel connection construction device for steel pipe piles 5 of the present invention realizes underwater parallel connection and onshore installation, greatly reducing the difficulty of installation and disassembly. The force of the entire device is clear. The tension of the parallel connection is borne by the steel wire rope 31 and the temporary fixed connection of the first steel pipe 11 and the second steel pipe 21. The pressure of the parallel connection is resisted by the first steel pipe 11, thereby eliminating the safety hazards of underwater operation. Compared with deep-water platforms without underwater parallel connection, the present device can effectively reduce the horizontal displacement of the platform top and reduce the risk of later platform use. The construction process of the present device is relatively small and the operation is simple, thus avoiding underwater operation and eliminating the need for large-scale lifting equipment. The construction cost can be greatly reduced. At the same time, the problem of excessive bending moment at the bottom of the steel pipe pile 5 is effectively solved, and the steel pipe pile 5 and the upper parallel connection structure are optimized, further reducing the construction cost. The present device has a wide range of applications, and is particularly suitable for terrain with wide beaches on both sides and low original ground or accidental situations where the water level rises beyond the design estimate during the construction process.

[0056] In another technical solution, Figure 4 As shown, it also includes a lowering auxiliary system 4, which includes a float 41. The buoyancy of the float 41 in water is greater than the total weight of the underwater parallel construction device for the steel pipe pile 5. A scale is set on the float 41, and a suspension line 42 is hinged between the bottom of the float 41 and the first steel pipe 11 and / or the second steel pipe 21.

[0057] By setting up the lowering auxiliary system 4, accurate positioning of the parallel connection can be achieved, which overcomes the problem of uncertain penetration depth of the steel pipe pile 5 into the rock, plays an anti-falling role during use, and facilitates the early installation and later dismantling work. The buoyancy of the pontoon 41 is required to be greater than the weight of the device in the water. One end of the suspension line 42 is connected to the hanging point at the bottom of the pontoon 41, and the other end is tied and connected to the first parallel connection structure and the second parallel connection structure. Both ends are hinged. When installing the parallel connection main structure on land, the lowering auxiliary system 4 is connected together. When lowering the parallel connection main structure, the pontoon 41 is first placed in the water. Then, while slowly lowering the parallel connection main structure, the scale of the pontoon 41 is observed. When the parallel connection main structure sinks to the predetermined scale, the lifting rope 6 of the crane is released, that is, the parallel connection main structure reaches the predetermined depth position.

[0058] In another technical solution, Figure 1-4 As shown, a plurality of first slots 13 are axially spaced apart on the side wall of the first steel tube 11, and a plurality of second slots 23 are axially spaced apart on the side wall of the second steel tube 21. At least one first slot 13 is aligned with one second slot 23, and steel bar clips 7 are inserted into the aligned first slots 13 and second slots 23.

[0059] A plurality of first notches 13 are opened in the axial direction in advance at the design position of the wall of the first steel pipe 11, and a plurality of second notches 23 are opened in the axial direction in advance at the design position of the wall of the second steel pipe 21. A steel bar clamp 7 is inserted between the first notch 13 and the second notch 23 to temporarily fix the first steel pipe 11 and the second steel pipe 21. The installation and disassembly are convenient. The axial length of the first notch 13 and the second notch 23 does not exceed 2 cm. It should be satisfied that the first steel pipe 11 can be tightly attached to the steel pipe pile 5 after the first sleeve 10 and the second sleeve 20 are pulled by the steel wire rope 31 of the fastening system 3. The tension of the flat joint is borne by the steel wire rope 31 and the first notch 13 and the second notch 23 on the first steel pipe 11 and the second steel pipe 21. The first notch 13 can be opened axially symmetrically on the wall of the first steel pipe 11, and the second notch 23 can be opened axially symmetrically on the wall of the second steel pipe 21. A steel bar clamp 7 is passed through the first notch 13 and the second notch 23 located in the same vertical direction.

[0060] In another technical solution, Figure 1-3 As shown, the intervals between the first notches 13 on the first steel tube 11 and the intervals between the second notches 23 on the second steel tube 21 are different, and a reinforcing plate is attached to the periphery of each of the first notches 13 and the second notches 23 .

[0061] The first steel pipe 11 and the second steel pipe 21 are connected by a plurality of first notches 13 and a second staggered cross-section arrangement, and reinforcing plates such as steel plates are welded around the first notches 13 and the second notches 23 to prevent local tearing of the steel pipes while enhancing the horizontal force bearing capacity of the entire parallel connection device.

[0062] In another technical solution, a diagonal brace is welded to one end of the first steel pipe 11 close to the first casing 10 , and the diagonal brace is used to connect to the corresponding crossbeam of the steel pipe pile 5 .

[0063] In another technical solution, Figure 1 、 3 As shown in FIG4 , the guide device 12 is a guide pulley, and a device for preventing the steel wire rope 31 from falling off is also provided on the outer side of the guide pulley.

[0064] After one end of the wire rope 31 of the fastening system 3 is connected to the fixed end 22, the other end is passed through the guide pulley to achieve guidance, and the traction direction of the wire rope 31 is adjusted from the horizontal direction to the vertical direction. By setting a device to prevent the wire rope 31 from falling off, the wire rope 31 is prevented from accidentally falling off under force, thereby ensuring the safety and smoothness of water construction. The device to prevent the wire rope 31 from falling off is such as setting a shell outside the guide pulley to leave space for the wire rope 31 to pass through.

[0065] In another technical solution, two fixed ends 22 are vertically spaced apart on the second sleeve 20, and one end of the wire rope 31 is sequentially connected to the two fixed ends 22. By vertically arranging two fixed ends 22 along the second sleeve 20, balanced force can be ensured.

[0066] In another technical solution, the first sleeve 10 and the second sleeve 20 have the same specifications and sizes, and the outer sides of each of the first sleeve 10 and the second sleeve 20 are respectively connected to a first steel pipe 11 and a second steel pipe 21, and the outer sides of each of the first sleeve 10 and each of the second sleeve 20 are respectively connected to a fixed end 22 and a guide device 12, and the first steel pipe 11, the second steel pipe 21, the fixed end 22, and the guide device 12 connected to each of the first sleeve 10 or the second sleeve 20 are in the same horizontal plane and are spaced 90° apart in sequence.

[0067] For the parallel connection between two steel pipe piles 5, the first parallel connection structure and the second parallel connection structure of the present device adopt two sleeve structures in total, namely the first sleeve 10 and the second sleeve 20. The specifications and dimensions of the first sleeve 10 and the second sleeve 20 are set to be the same (material, height, wall thickness, outer diameter, etc.) and processed to reduce the number of component types. The present device can also be used for the parallel connection between four steel pipe piles 5, which is equivalent to a first parallel connection mechanism 1 and a second parallel connection mechanism 2 overlapping and sharing a sleeve structure to form a superimposed parallel connection mechanism. At this time, four superimposed parallel connection mechanisms are provided, and the positions of the guide device 12 and the fixed end 22 are adjusted accordingly to ensure that a first guide device 12 and a fixed end 22 are located on the same side, and a set of fastening system 3 connection devices and fixed ends 22 are provided between each two adjacent steel pipe piles 5.

[0068] In another technical solution, Figure 4 As shown, the top of the steel pipe pile 5 is provided with a hook end 33, which is an annular clamp fastened to the outside of the top of the steel pipe pile 5, and the tensioner 32 is connected to the hook end 33. The provision of the hook end 33 facilitates the installation of the tensioner 32 on the top of the steel pipe pile 5.

[0069] The present invention also provides a construction method for an underwater parallel connection construction device for steel pipe piles, comprising the following steps:

[0070] S1, processing the first parallel connection mechanism 1 and the second parallel connection mechanism 2 according to the size and construction interval of the steel pipe pile 5;

[0071] S2, driving two steel pipe piles 5;

[0072] S3. Nest the first steel tube 11 and the second steel tube 21, aligning the first notch 13 and the second notch 23, and inserting the steel bar clamp 7 into the first and second parallel joints 1 and 2 to form a parallel joint main structure. Connect one end of the suspension wire 42 to the parallel joint main structure and the other end to the buoyancy tank 41.

[0073] S4. Removably connect one end of the steel wire rope 31 of the fastening system 3 to the fixed end 22, and then pass the wire rope through the guide device 12 and connect the other end to the tensioner 32 in the relaxed state;

[0074] S5, hoist the parallel main structure and accurately hoist it into the designed position, ensuring that the first casing 10 and the second casing 20 are inserted into the two steel pipe piles 5 in step S2;

[0075] S6. Set a hook end 33 on the top of the steel pipe pile 5 inserted into the first casing 10, connect the tensioner 32 to the hook end 33, and place the buoyancy box 41 into the water;

[0076] S7. Slowly lower the parallel main structure, observe the scale on the pontoon 41, and release it from the lifting mechanism after it sinks to the predetermined scale;

[0077] S8. Use the tensioner 32 to tighten the wire rope 31 and reach the designed tightening force;

[0078] S9. After the construction is completed, loosen the steel wire rope 31 and slowly lift the parallel main structure to the water surface for removal.

[0079] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An underwater parallel connection construction device for steel pipe piles, characterized in that: include: The first paralleling mechanism includes a vertically arranged first sleeve, the inner diameter of the first sleeve being slightly larger than the outer diameter of the steel pipe pile, a first steel pipe being fixedly connected to the outer side of the first sleeve in a horizontal direction, the length of the first steel pipe being slightly smaller than the distance between the two steel pipe piles to be paralleled, and a guide device being provided on the outer side of the first sleeve; The second parallel connection mechanism includes a second sleeve arranged vertically, the inner diameter of the second sleeve being slightly larger than the outer diameter of the steel pipe pile, a second steel pipe being fixedly connected to the outer side of the second sleeve in a horizontal direction, the second steel pipe being completely connected to the interior of the second sleeve, the inner diameter of the second steel pipe being slightly larger than the outer diameter of the first steel pipe, the first steel pipe being inserted into the interior of the second steel pipe and being temporarily fixedly connected thereto, a fixed end being provided on the outer side of the second sleeve, the fixed end and the guide device being located on the same side of the first steel pipe and at the same height; A plurality of first notches are provided axially spaced apart on the side wall of the first steel pipe, and a plurality of second notches are provided axially spaced apart on the side wall of the second steel pipe, at least one first notch is aligned with one second notch, and steel bar clips are inserted into the aligned first and second notches to temporarily fix the connection on land; The fastening system includes a wire rope and a tensioner. The tensioner is connected to the upper end of the steel pipe pile and is arranged in coordination with the position of the guide device. One end of the wire rope is detachably connected to the fixed end, and the other end is connected to the tensioner after passing around the guide device. The tensioner is used to tighten the wire rope and achieve the designed fastening force. After the wire rope is pulled, the first sleeve and the second sleeve are able to cling to the steel pipe pile. A hook end is provided on the top of the steel pipe pile. The hook end is an annular hoop fastened to the outside of the top of the steel pipe pile. The tensioner is connected to the hook end.

2. The underwater parallel connection construction device for steel pipe piles according to claim 1, characterized in that: It also includes a lowering auxiliary system, which includes a float. The buoyancy of the float in water is greater than the total weight of the underwater parallel construction device for steel pipe piles. A scale is set on the float, and a suspension line is hinged between the bottom of the float and the first steel pipe and / or the second steel pipe.

3. The underwater parallel connection construction device for steel pipe piles according to claim 1, characterized in that: The intervals between the first notches on the first steel pipe and the intervals between the second notches on the second steel pipe are different, and a reinforcing plate is attached to the periphery of each of the first notches and the second notches.

4. The underwater parallel connection construction device for steel pipe piles according to claim 1, characterized in that: The first steel pipe is further welded with a diagonal brace at one end close to the first sleeve, and the diagonal brace is used to connect with the corresponding crossbeam of the steel pipe pile.

5. The underwater parallel connection construction device for steel pipe piles according to claim 1, characterized in that: The guide device is a guide pulley, and a wire rope anti-falling device is also provided on the outer side of the guide pulley.

6. The underwater parallel connection construction device for steel pipe piles according to claim 1, characterized in that: Two fixed ends are vertically spaced apart on the second sleeve, and one end of the steel wire rope is connected to the two fixed ends in sequence.

7. The underwater parallel connection construction device for steel pipe piles according to claim 1, characterized in that: The specifications and dimensions of the first sleeve and the second sleeve are the same. The outer sides of each of the first sleeve and the second sleeve are respectively connected to one of the first steel pipe and the second steel pipe. The outer sides of each of the first sleeve and the second sleeve are respectively connected to one of the fixed ends and the guide device. The first steel pipe, the second steel pipe, the fixed end, and the guide device connected to each of the first sleeve or the second sleeve are in the same horizontal plane and are spaced 90° apart in sequence.

8. The construction method for the underwater parallel connection construction device for steel pipe piles according to claim 2, characterized in that: The steps include: S1. Process the first and second parallel joints according to the size and construction interval of the steel pipe piles; S2, driving two steel pipe piles; S3. Nest the first steel tube and the second steel tube, align a first notch and a second notch, and insert a steel bar clamp into both to connect the first and second parallel joints into a whole to form a parallel joint main structure. Connect one end of the suspension wire to the parallel joint main structure and the other end to the pontoon. S4. Removably connect one end of the wire rope of the fastening system to the fixed end, then pass it through the guide device and connect the other end to the tensioner in the relaxed state; S5. Lift the parallel main structure and accurately hoist it into the designed position, ensuring that the first and second casings are inserted into the two steel pipe piles in step S2; S6. Install a hook end on the top of the steel pipe pile inserted into the first casing, connect the tensioner to the hook end, and place the buoyancy box into the water; S7. Slowly lower the parallel main structure, observe the scale on the pontoon, and release it from the lifting mechanism after it sinks to the predetermined scale; S8. Use a tensioner to tighten the wire rope and reach the designed tightening force; S9. After the construction is completed, loosen the wire rope and slowly lift the parallel main structure to the water surface for dismantling.

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