Large-section steel box girder gantry crane general splicing platform and construction method

Abstract

The invention provides a large-section steel box girder gantry crane general splicing platform and a construction method, and the construction method comprises the following steps: step 1, separating a transport ship support from an existing trestle panel, step 2, extending the top of an existing pipe pile to connect with a bracket, step 3, erecting a bracket system, step 4, moving away a transport ship, step 5, installing a hoisting system, and step 6, arranging a splicing system. 7, a reverse jacking system is arranged; and 8, steel box girder installation and reverse jacking operation are carried out. Through mutual connection and supporting of the support and the reverse jacking system, the hoisting and splicing stability and the beam body precision are improved, the construction process is simplified, the efficiency is improved, meanwhile, the adaptability to different environments is enhanced through the existing trestle and the water transport ship, and particularly the application in water area construction is enhanced.

Description

Technical Field

[0001] The invention relates to the field of protection and management of dangerous rock masses on high and steep slopes, and in particular to a large-section steel box girder gantry crane assembly platform and a construction method. Background Art

[0002] In the field of bridge construction, especially in the construction of large-span bridges, the splicing and hoisting of steel box girders is a technical difficulty. Traditional construction methods often have problems such as low efficiency, poor safety, and high cost. Especially in the construction of large-section steel box girders, due to the large size and heavy weight of the beam body, higher requirements are placed on the stability and bearing capacity of the construction platform. In addition, steel box girders are prone to large bending moments and deformations during the hoisting and splicing process, which not only affects the construction quality, but also increases the construction risk. The existing gantry crane assembly platform cannot use the existing temporary trestles for construction, especially in terms of adaptability, stability and ease of operation.

[0003] Therefore, it is necessary to develop a new type of gantry crane assembly platform and construction method to improve the efficiency and safety of large-section steel box girder construction, reduce construction costs, and ensure construction quality. The present invention aims to provide a new type of large-section steel box girder gantry crane assembly platform and construction method, which solves the above problems in the prior art by integrating a support system, a gantry hoisting system, an assembly system and a reverse top system. Summary of the invention

[0004] The object of the present invention is to provide a large-section steel box girder gantry crane assembly platform and a construction method for solving the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the present invention provides a construction method for a large-section steel box girder gantry crane assembly platform, comprising the following steps:

[0006] Step 1: Separation of the support of the transport ship from the existing trestle deck: The two transport ships are connected by a pair of braces, and a support system arranged at intervals is installed on the transport ship, and the support system is fixed on both sides of the existing trestle deck;

[0007] Step 2: The top of the existing pipe pile is extended and connected with the bracket: water is poured into the transport ship, the height of the support system is lowered, and the elevation of the existing trestle deck is lowered accordingly, so that the top of the existing pipe pile extends out of the top surface of the existing trestle deck; the pipe pile of the mounting bracket is connected to the top of the existing pipe pile to achieve the connection between the upper and lower pipe piles;

[0008] Step 3: Setting up the support system: Using a transport ship on the water, arrange two sets of support systems on both sides of the steel box girder to be erected;

[0009] Step 4: The transport ship is removed: The transport ship is removed and the support system is set up;

[0010] Step 5: Installation of the hoisting system: several support frames are installed on the working panel, and shelf boards are installed on the support frames. Legs are installed on the shelf boards located on the outside; a gantry is installed between the two sets of legs, and a hook is installed on the gantry for hoisting operations;

[0011] Step 6: Assembly system layout: Install a fixed bracket on the inner shelf plate, and support the assembled steel box beam on the fixed bracket;

[0012] Step 7: Setting up the anti-top system: Connect the lower fixed rod and the upper fixed rod to the pipe piles inside the two sets of brackets, and connect the side brace between the lower fixed rod and the upper fixed rod; the side brace is provided with a support block, and the support block is connected and installed with a cross-connecting plate; a slide rail is installed on the cross-connecting plate, and a movable bracket is movably arranged on the slide rail, so that the movable bracket supports the steel box girder;

[0013] Step 8. Installation and reverse operation of steel box girder: Use the gantry and hook to lift the steel box girder unit, and use the fixed bracket to support the assembly of the steel box girder.

[0014] The beneficial effects of the present invention are:

[0015] 1. The stability of the entire construction platform is enhanced through the mutual connection and support of the support system and the anti-top system, especially during the hoisting and splicing process of large-section steel box girders.

[0016] 2. The effective application of the anti-top system reduces the mid-span bending moment and middle deformation of the steel box girder during the installation process, ensuring the geometric size and linear accuracy of the beam.

[0017] 3. The integrated construction platform design simplifies the construction process, shortens the construction period and improves construction efficiency.

[0018] 4. Utilize existing pipe piles and pier panels, and use transport ships on the water and their support systems to optimize construction, thereby improving the adaptability of the construction platform to different construction environments, especially construction in aquatic environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall assembly platform of the large-section steel box girder gantry crane of the present invention;

[0020] Figure 2 It is a schematic diagram of the existing pipe piles and the existing trestle deck;

[0021] Figure 3 It is a schematic diagram of the transport ship and the support system (low water level);

[0022] Figure 4 This is a schematic diagram of the transport ship and support system (high water level);

[0023] Figure 5It is a schematic diagram of the connection between the upper pipe pile and the existing pipe pile;

[0024] Figure 6 This is a schematic diagram of the bracket installation completion;

[0025] Figure 7 To make a hollow hole.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] In the figure: 1. Existing pipe pile; 2. Existing trestle deck; 3. Water surface; 4. Bracket; 5. Bracket reinforcement rod; 6. Working panel; 7. Support frame; 8. Diagonal brace; 9. Shelf board; 10. Gantry; 11. Hook; 12. Outrigger; 13. Fixed bracket; 14. Lower fixed rod; 15. Side brace; 16. Upper fixed rod; 17. Support block; 18. Cross-connecting plate; 19. Slide rail; 20. Fixed block; 21. Horizontal jacking rod; 22. Bottom supporting plate; 23. Vertical jacking rod; 24. Movable bracket; 25. Bracket plate; 26. Top frame; 27. Steel box girder; 28. Transport ship; 29. ​​Watertight compartment; 30. Water in the warehouse; 31. Counter-supporting rod; 32. Pad beam; 33. Column; 34. Positioning arc plate; 35. Jacking plate; 36. Support frame; 37. Temporary support plate; 38. Hollow hole. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which 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 operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] like Figure 1-Figure 7The present invention provides a construction method for a large-section steel box girder gantry crane assembly platform, comprising the following steps:

[0032] Step 1: Separate the support of the transport ship 28 from the existing pier deck 2:

[0033] The two transport ships 28 are connected by a pair of braces 31, and a support system arranged at intervals is installed on the transport ships 28. The support system includes a cushion beam 32, a column 33, a positioning arc plate 34, a lifting plate 35, a support frame 36 and a temporary support plate 37, which are fixed on both sides of the existing pier;

[0034] The transport ship 28 has a watertight compartment 29, and the transport ship 28 is used to temporarily support the existing trestle deck 2, reduce the water level 30 in the compartment, and separate the existing trestle deck 2 from the existing pipe pile 1 by drilling holes 38;

[0035] A plurality of hollow holes 38 are punched on the existing trestle deck 2 . The hollow holes 38 are located at the upper center of the existing pipe piles 1 and have a diameter greater than that of the existing pipe piles 1 .

[0036] Step 2: The top of the existing pipe pile 1 extends out and connects with the bracket 4:

[0037] When water is poured into the watertight compartment 29 of the transport ship 28 and the water level is high, the height of the support system is lowered, and the elevation of the existing trestle deck 2 is lowered accordingly, so that the top of the existing pipe pile 1 extends out of the top surface of the existing trestle deck 2;

[0038] A pipe pile of the mounting bracket 4 is connected to the top of the existing pipe pile 1 to achieve the connection between the upper and lower pipe piles.

[0039] Step 3: Setting up the support system:

[0040] Using a transport ship 28 on the water surface 3, two sets of support systems are arranged on both sides of the steel box girder 27 to be erected;

[0041] Each support system includes an existing pipe pile 1 and an existing trestle panel 2. The existing pipe pile 1 is connected to a support 4. A support reinforcement rod 5 is provided between adjacent supports 4. A plurality of support 4 tops are provided with an operating panel 6.

[0042] After the upper and lower pipe piles are connected, the existing steel plate trestle deck 2 is connected to the existing pipe piles 1.

[0043] Step 4: Transport ship 28 is removed:

[0044] After completing the above connection, the transport ship 28 can be removed and the support system is completed.

[0045] Step 5: Installation of the hoisting system:

[0046] A plurality of support frames 7 are installed on the working panel 6, a shelf plate 9 is installed on the plurality of support frames 7, and a support leg 12 is installed on the shelf plate 9 located on the outer side;

[0047] A gantry 10 is connected and installed between the two groups of legs 12, and a hook 11 is movably provided on the gantry 10 for hoisting operations.

[0048] Step 6: Assembly system layout:

[0049] A fixing bracket 13 is installed on the inner shelf plate 9 , and the fixing bracket 13 supports the assembled steel box beam 27 .

[0050] Step 7: Anti-top system setting:

[0051] A lower fixing rod 14 and an upper fixing rod 16 are connected to the pipe piles inside the two sets of brackets 4, and a side support 15 is connected between the lower fixing rod 14 and the upper fixing rod 16;

[0052] The side support 15 is provided with a support block 17, and the support block 17 is connected and installed with a cross connecting plate 18;

[0053] A slide rail 19 is installed on the transverse connecting plate 18, and a fixing block 20 is provided on one side of the slide rail 19, and a transverse push rod 21 is connected to the fixing block 20;

[0054] The horizontal push rod 21 is connected to the movable bracket 24, and the movable bracket 24 has a vertical lifting rod 23 and a bracket plate 25 at the lower part, and a bracket plate and a top frame 26 at the upper part. The vertical lifting rod 23 is movably matched with the slide rail 19, and the top frame 26 supports the bottom of the steel box beam 27.

[0055] Step 8: Installation and reverse top operation of steel box girder 27:

[0056] The steel box beam 27 unit is hoisted by using the gantry 10 and the hook 11, and the steel box beam 27 is supported and assembled by using the fixed bracket 13;

[0057] Use the slide rail 19 and the transverse push rod 21 to move the movable bracket 24 to the middle position of the steel box beam 27;

[0058] The vertical lifting rod 23 is used to flexibly support the bottom of the steel box girder 27 to reduce the mid-span bending moment and the deformation of the middle part of the steel box girder 27.

[0059] The invention also discloses a large-section steel box girder gantry crane assembly platform, comprising a support system, a gantry hoisting system, an assembly system, and a reverse top system, wherein the systems are interconnected and support each other.

[0060] Support system: Two groups of support systems are arranged on both sides of the steel box girder 27 to be erected, and each support system includes an existing pipe pile 1 and an existing trestle panel 2. The existing pipe pile 1 is connected with a support 4, and the support 4 has a support reinforcement rod 5 and an operating panel 6.

[0061] Lifting system: A plurality of support frames 7 are installed on the working panel 6, and diagonal braces 8 are arranged between adjacent support frames 7 for fixing. A shelf plate 9 is installed on the support frame 7, and legs 12 are installed on the outer shelf plate 9. A gantry 10 is connected and installed between two groups of legs 12, and the gantry 10 has a hook 11.

[0062] Assembling system: A fixing bracket 13 is installed on the inner shelf plate 9, and the fixing bracket 13 supports the assembled steel box beam 27.

[0063] Anti-top system: The pipe piles inside the two groups of brackets 4 are connected with a lower fixed rod 14 and an upper fixed rod 16, and the lower fixed rod 14 and the upper fixed rod 16 are connected with a side support 15, and the side support 15 has a support block 17, and a cross-connecting plate 18 is connected and installed on the support block 17, and a slide rail 19 is installed on the cross-connecting plate 18, and a fixed block 20 is provided on one side of the slide rail 19, and a transverse jacking rod 21 is connected to the fixed block 20, and the transverse jacking rod 21 is connected to a movable bracket 24, and the lower part of the movable bracket 24 has a vertical jacking rod 23 and a bottom supporting plate 22, and the upper part of the movable bracket 24 has a bracket plate 25 and a top frame 26, and the top frame 26 can support the steel box girder 27. The function of the anti-jacking support 4 is to use the slide rail 19 and the horizontal jacking rod 21 to move the movable bracket 24 to the middle position of the steel box girder 27 during the installation of the steel box girder 27, and use the vertical jacking rod 23 to flexibly support the bottom of the steel box girder 27, so as to reduce the mid-span bending moment and middle deformation of the steel box girder 27.

[0064] The erection of the support system utilizes the existing pipe piles 1 and the existing pier deck 2, and uses a transport ship 28 on the water surface 3 to optimize the erection process: the transport ship 28 is located on both sides of the existing pipe piles 1, and a pair of support rods 31 are connected between the two transport ships 28. The transport ship 28 is installed with a support system arranged at intervals, and the support system includes: a cushion beam 32, a column 33, a positioning arc plate 34, a lifting plate 35, a support frame 3636, and a temporary support plate 37. The support system is fixedly connected to both sides of the existing pier; the transport ship 28 is provided with a watertight compartment 29; in actual operation, the transport ship 28 is used to temporarily support the existing pier deck 2. At this time, the water 30 in the compartment of the transport ship 28 is at a low water level, and the existing pier deck 2 is separated from the existing pipe piles 1 by using hollow holes 38, that is, a number of hollow holes are drilled on the existing pier deck 2. The hollow hole 38 is located at the upper center of the existing pipe pile 1, and the diameter of the hollow hole 38 is larger than the diameter of the pipe pile. Then, the water 30 in the warehouse is filled to a high water level, that is, the height of the support system decreases as the height of the transport ship 28 decreases, and the elevation of the existing trestle panel 2 is also lowered. Since the hollow hole 38 has been used to separate the existing trestle panel 2 from the existing pipe pile 1, the top of the existing pipe pile 1 extends out of the top surface of the existing trestle panel 2, and then the pipe pile of the mounting bracket 4 is connected to the top of the existing pipe pile 1 to achieve the connection between the upper and lower pipe piles, and finally the steel plate existing trestle panel 2 is connected to the existing pipe pile 1, and finally the transport ship 28 can be removed. In this process, the top of the existing pipe pile 1 extends out of the top surface of the existing trestle panel 2, which is more convenient for the connection construction of the upper and lower pipe piles.

[0065] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. The construction method of the large-section steel box girder gantry crane assembly platform is characterized in that: The following steps are involved: Step 1: The support of the transport ship (28) is separated from the existing trestle panel (2): the two transport ships (28) are connected by a pair of support rods (31), and a support system arranged at intervals is installed on the transport ship (28), and the support system is fixed on both sides of the existing trestle panel (2); Step 2, the top of the existing pipe pile (1) extends out and is connected to the bracket (4): water is poured into the transport ship (28), the height of the support system is lowered, and the elevation of the existing trestle deck (2) is lowered accordingly, so that the top of the existing pipe pile (1) extends out of the top surface of the existing trestle deck (2); the pipe pile of the mounting bracket (4) is connected to the top of the existing pipe pile (1), so as to realize the connection between the upper and lower pipe piles; Step 3: Setting up the support system: using a transport ship (28) on the water surface (3), two sets of support systems are arranged on both sides of the steel box girder (27) to be erected; Step 4: The transport ship (28) is removed: The transport ship (28) is removed, and the support system is set up; Step 5, installation of the hoisting system: a plurality of support frames (7) are installed on the working panel (6), a shelf plate (9) is installed on the plurality of support frames (7), and a support leg (12) is installed on the shelf plate (9) located on the outside; a gantry (10) is connected and installed between the two groups of support legs (12), and a lifting hook (11) is movably provided on the gantry (10) for hoisting operation; Step 6: Assembly system layout: Install a fixed bracket (13) on the inner shelf plate (9), and support the assembled steel box beam (27) on the fixed bracket (13); Step 7, setting up the anti-top system: connecting a lower fixed rod (14) and an upper fixed rod (16) to the pipe piles inside the two groups of brackets (4), and connecting a side support (15) between the lower fixed rod (14) and the upper fixed rod (16); the side support (15) has a support block (17), and the support block (17) is connected to and installed with a cross-connecting plate (18); a slide rail (19) is installed on the cross-connecting plate (18), and a movable bracket (24) is movably arranged on the slide rail (19), so that the movable bracket (24) supports the steel box girder (27); Step 8: Installation and reverse operation of the steel box girder (27): The steel box girder (27) unit is hoisted by using the gantry (10) and the hook (11), and the steel box girder (27) is supported and assembled by using the fixed bracket (13).

2. The construction method of the large-section steel box girder gantry crane assembly platform according to claim 1 is characterized by: In step 1, the support system includes a cushion beam (32), a column (33), a positioning arc plate (34), a lifting plate (35), a support frame (36) and a temporary support plate (37) which are sequentially erected. The transport ship (28) has a watertight compartment (29). The transport ship (28) is used to temporarily support the existing pier deck (2), lower the water level (30) in the compartment, and separate the existing pier deck (2) from the existing pipe pile (1) by drilling a hole (38).

3. The construction method of the large-section steel box girder gantry crane assembly platform according to claim 2 is characterized by: In step 1, a plurality of hollow holes (38) are punched on the existing trestle deck (2), the hollow holes (38) are located at the upper center of the existing pipe piles (1), and the diameter is larger than the diameter of the existing pipe piles (1), so as to reduce the water (30) level in the warehouse, and separate the existing trestle deck (2) from the existing pipe piles (1) through the hollow holes (38).

4. The construction method of the large-section steel box girder gantry crane assembly platform according to claim 1 is characterized by: In step three, each support system includes existing pipe piles (1) and existing pier panels (2), the existing pipe piles (1) are connected to supports (4), support reinforcement rods (5) are provided between adjacent supports (4), and operating panels (6) are provided on the tops of several supports (4).

5. The construction method of the large-section steel box girder gantry crane assembly platform according to claim 1 is characterized by: In step seven, a fixed block (20) is provided on one side of the slide rail (19), and a transverse push rod (21) is connected to the fixed block (20); and the transverse push rod (21) is connected to the movable bracket (24).

6. The construction method of the large-section steel box girder gantry crane assembly platform according to claim 5 is characterized by: The movable bracket (24) has a vertical lifting rod (23) and a bracket plate (25) at the bottom, and a bracket plate and a top frame (26) at the top. The vertical lifting rod (23) is movably matched with the slide rail (19), and the top frame (26) supports the bottom of the steel box beam (27).

7. The construction method of the large-section steel box girder gantry crane assembly platform according to claim 1 is characterized by: In step eight, the movable bracket (24) is moved to the middle position of the steel box beam (27) by using the slide rail (19) and the transverse jacking rod (21); and the bottom of the steel box beam (27) is movably supported by the vertical jacking rod (23).

8. A large-section steel box girder gantry crane assembly platform, characterized by: It is obtained by the construction method of the large-section steel box girder gantry crane assembly platform according to any one of claims 1-7.

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