Rotation and disassembly device and method for continuous beam bridge across railway

Abstract

The present invention discloses a device and method for rotating and assembling an existing continuous beam bridge spanning a railway. The device comprises a support member disposed between the bottom end of the box beam and the bridge pier and located on the central axis of the box beam, the support member being used to support the box beam; a traction member, the box beam being obliquely divided into two segments, the traction member being used to pull the two segments, and the two segments moving in opposite directions via the traction member; and a slideway disposed below the box beam, the two segments being slidably connected to the slideway. The present invention can ensure safety during the dismantling of an existing continuous beam bridge spanning a railway, as well as the rapid, safe, and orderly dismantling of the construction. By using off-road construction, the existing continuous beam bridge spanning a railway is rotated away from the railway, reducing interference with the existing railway.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a rotation and disassembly device and method for an existing continuous beam bridge spanning a railway. Background Art

[0002] With the rapid development of transportation construction, the number of existing cross-railway bridge projects has increased, and bridge rotation technology is widely used for construction. After reaching the end of their normal service life, cross-railway bridges need to be demolished. If conventional construction methods such as cutting, tamping, and blasting are used, they will inevitably have a negative impact on the normal operation of the railway and pose a safety threat to trains. Therefore, the demolition of existing cross-railway bridges must ensure the normal and safe operation of trains and the safe and orderly construction of the bridge demolition. Summary of the Invention

[0003] The purpose of the present invention is to provide a device and method for rotating and disassembling an existing continuous beam bridge across a railway, so as to solve the problems existing in the above-mentioned prior art, ensure the safety issues during the dismantling process of the existing continuous beam bridge across a railway and ensure the rapid, safe and orderly progress of the dismantling construction. Through off-road construction, the existing continuous beam bridge across the railway is rotated away from the top of the railway, reducing interference with the existing railway.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A rotating and disassembling device for an existing continuous beam bridge across a railway, comprising:

[0006] A support member is provided between the bottom end of the box girder and the pier and is located on the central axis of the box girder, and is used to support the box girder;

[0007] A traction member, wherein the box beam is obliquely divided into two split bodies, and the traction member is used to pull the two split bodies, and the two split bodies move in opposite directions through the traction member;

[0008] A slide is provided below the box beam, and both of the split bodies are slidably connected to the slide.

[0009] Furthermore, the slide is arranged in a circular ring shape, the cross-section of the slide is groove-shaped and is sleeved on the outside of the bridge pier, the bottom end of the slide is fixedly connected to a support tube, the support tube is used to support the slide, the support tube is connected to the bridge pier through a connecting rod, and four support legs are provided at the bottom end of the box girder web, the four support legs are located in the slide and are slidably connected to the slide, and the top end of the support legs is fixedly connected to the bottom end of the box girder web.

[0010] Furthermore, the support member includes a ball joint, the bottom end of the ball joint is fixed to the top end of the pier, the top end of the ball joint is fixed to the bottom end of the box girder and corresponds to the central axis of the box girder, the ball joint is located between two supports, the supports are used to connect the bottom end of the box girder and the top end of the pier, a positioning pin is fixed on the pier, and the positioning pin is located at the center of the ball joint.

[0011] Furthermore, the traction member includes a track fixed to the inner wall of the bottom end of the slide, the bottom end of the support leg is connected to a pulley, the pulley is located in the track, and the pulley is slidably connected to the slide through the track.

[0012] Furthermore, the support member includes a ball joint, the bottom end of the ball joint is fixed to the top end of the pier, the top end of the ball joint is fixedly connected to an upper turntable, the top end of the upper turntable is fixed to the bottom end of the box girder and corresponds to the central axis of the box girder, the ball joint is located between two supports, the supports are used to connect the bottom end of the box girder and the top end of the pier, a positioning pin is fixed to the pier, and the positioning pin is located at the center of the ball joint and the upper turntable.

[0013] Furthermore, the traction member includes a temporary rotating platform, a traction top is fixedly connected to the top of the temporary rotating platform, a movable end of the traction top is connected to a traction rope, and the end of the traction rope is connected to the upper turntable.

[0014] Furthermore, the oblique cutting direction of the box girder is the maximum radius of rotation of the acute-angle bridge deck of the box girder after cutting.

[0015] The existing method for disassembling and rotating a continuous beam bridge across a railway includes the following steps:

[0016] S1. Supporting the box girder: Place supports between the two supports and between the box girder and the pier;

[0017] S2. Laying the slideway: Lay a circular slideway toward the outside of the pier and fix four legs to the bottom of the box girder;

[0018] S3. Installing traction parts: Installing traction parts on the slideway;

[0019] S4, cutting box beam: cutting box beam obliquely;

[0020] S5. Dismantle the box girder: start the traction parts and separate the two parts.

[0021] Furthermore, in step S1, a ball joint and a positioning pin are placed between the two supports and between the box girder and the pier. In steps S3-S5, the track is fixed into the slideway, the supports are removed, a pulley is connected under the support foot, and the pulley is placed in the track. The pulley is started and moves along the track to separate the two split bodies.

[0022] Furthermore, in step S1, a ball joint, a positioning pin shaft, and an upper turntable are placed between the two supports and between the box girder and the pier. In steps S3-S5, two temporary rotating platforms are set up outside the slideway, and a traction top is fixed to the temporary rotating platform, the traction top and the upper turntable are connected, the two traction tops are started, and the two split bodies are separated.

[0023] The present invention discloses the following technical effects:

[0024] By setting support members to pre-support the box girder, the box girder is divided into two parts, and slideways and traction members corresponding to the two parts are laid out on the outside of the pier. After the box girder is cut, the two parts are moved in opposite directions by the two traction members. Through off-road construction, the existing continuous beam bridge across the railway is turned away from the railway, reducing interference with the existing railway and ensuring the normal and safe operation of the train. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is the front view of the box girder before disassembly;

[0027] Figure 2 It is a cross-sectional view of the connection between the traction rope-free rotating and disassembling device and the box girder;

[0028] Figure 3 It is a longitudinal cross-sectional view of the connection between the traction rope-free rotating and disassembling device and the box girder;

[0029] Figure 4 for Figure 2 Schematic diagram of the structure of the AA section;

[0030] Figure 5 This is a schematic diagram of box girder cutting;

[0031] Figure 6 This is a detailed drawing of the pulley track of the swivel disassembly and assembly device without a traction rope;

[0032] Figure 7 It is a cross-sectional view of the connection between the traction cable rotation and disassembly device and the box girder;

[0033] Figure 8 It is a longitudinal cross-sectional view showing the connection between the traction cable rotation and disassembly device and the box girder;

[0034] Figure 9 for Figure 7Schematic diagram of the structure of the BB section.

[0035] Among them, 1. ball joint; 2. support; 3. box girder; 4. pier; 5. support pipe; 6. slide; 7. support leg; 8. upper turntable; 9. traction rope; 10. traction top; 11. temporary rotating platform; 12. positioning pin shaft; 13. track; 14. pulley; 15. connecting rod; 16. tetrafluoroethylene plate. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 without making creative efforts are within the scope of protection of the present invention.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1-9 As shown, a rotation and disassembly device for an existing continuous beam bridge across a railway includes a support member, which is arranged between the bottom end of the box beam 3 and the pier 4 and is located on the central axis of the box beam 3, and the support member is used to support the box beam 3; a traction member, which obliquely divides the box beam 3 into two split bodies, and the traction member is used to pull the two split bodies, and the two split bodies move in opposite directions through the traction member; a slide 6, which is arranged below the box beam 3, and the two split bodies are both slidably connected to the slide 6.

[0039] When dismantling the box girder 3, first place the support between the box girder 3 and the pier 4. The support plays the role of supporting the box girder 3. Then, lay the slide 6 on the outside of the pier 4, and install the corresponding structure matching the slide 6 on the two split bodies formed after the box girder 3 is split, so that the split bodies can slide on the slide 6. Then, cut the box girder 3 obliquely, and use the traction parts to pull the two cut bodies in different directions until they are pulled to a position convenient for disassembly and assembly, and then carry out the final disassembly and assembly work.

[0040] To further optimize the solution, the slide 6 is arranged in a circular ring shape, the cross-section of the slide 6 is groove-shaped and is sleeved on the outside of the pier 4, the bottom end of the slide 6 is fixedly connected to the support tube 5, the support tube 5 is used to support the slide 6, and the support tube 5 is connected to the pier 4 through the connecting rod 15. Four support legs 7 are provided at the bottom end of the web of the box girder 3. The four support legs 7 are located in the slide 6 and are slidably connected to the slide 6, and the top of the support legs 7 is fixedly connected to the bottom end of the web of the box girder 3.

[0041] Specifically, the annular slide 6 is made of channel steel, and four legs 7 are placed in the slide 6. The legs 7 are supported below the cut segment and serve as a swivel stabilizing structure.

[0042] To further optimize the solution, the support member includes a ball joint 1, the bottom end of the ball joint 1 is fixed to the top of the pier 4, the top of the ball joint 1 is fixed to the bottom end of the box girder 3 and corresponds to the central axis of the box girder 3, the ball joint 1 is located between two supports 2, the supports 2 are used to connect the bottom end of the box girder 3 and the top of the pier 4, and a positioning pin 12 is fixed to the pier 4, and the positioning pin 12 is located at the center of the ball joint 1.

[0043] A further optimized solution is that the traction member includes a track 13 fixed to the inner wall of the bottom end of the slide 6, and a pulley 14 is connected to the bottom end of the support leg 7. The pulley 14 is located in the track 13, and the pulley 14 is slidably connected to the slide 6 through the track 13.

[0044] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 , use a reasonable power device to provide rotational power for the pulley 14, and through the pulley 14 moving on the track 13, drive the two split bodies formed by the cutting of the box beam 3 to rotate in different directions.

[0045] The ball joint 1 is a hydraulic ball joint that can be raised and lowered in height to support the box girder 3 .

[0046] To further optimize the solution, the support member includes a ball joint 1, the bottom end of the ball joint 1 is fixed to the top of the pier 4, the top of the ball joint 1 is fixedly connected to an upper turntable 8, the top of the upper turntable 8 is fixed to the bottom end of the box girder 3 and corresponds to the central axis of the box girder 3, the ball joint 1 is located between the two supports 2, the supports 2 are used to connect the bottom end of the box girder 3 and the top of the pier 4, a positioning pin 12 is fixed to the pier 4, and the positioning pin 12 is located at the center of the ball joint 1 and the upper turntable 8.

[0047] Reference Figure 7 、 Figure 8 、 Figure 9 When dismantling the box girder 3, first place the support between the box girder 3 and the pier 4. The support plays the role of supporting the box girder 3. Then, lay the slide 6 on the outside of the pier 4, and install the structure matching the slide 6 on the two split bodies formed after the box girder 3 is split, so that the split bodies can slide on the slide 6. Then, set up the traction parts on the outside of the slide 6, and connect the traction ends on the traction parts to the two split bodies formed after the box girder 3 is split. After the above operations are completed, the box girder 3 is cut obliquely, and the two cut bodies are pulled in different directions by two traction parts until they are pulled to a position convenient for disassembly and assembly, and then the final disassembly and assembly work is carried out.

[0048] It can be understood that the support member is arranged on the central axis of the box beam 3, that is, when the box beam 3 is cut into two divided bodies, the support member can still support the two divided bodies.

[0049] The ball joint 1 is a hydraulic ball joint that can be raised and lowered in height to support the box girder 3 .

[0050] Among them, the four legs 7 are located in the slide 6 and are slidably connected to the slide 6 through the tetrafluoroethylene plate 16.

[0051] According to a further optimized solution, the traction device includes a temporary rotating platform 11 , a traction top 10 is fixed to the top of the temporary rotating platform 11 , a movable end of the traction top 10 is connected to a traction rope 9 , and the end of the traction rope 9 is connected to the upper turntable 8 .

[0052] The temporary rotating platform 11 is used to fix the traction top 10, which is used to provide traction power to the traction rope 9. By arranging the traction tops 10 on both sides of the box beam 3, the two split bodies formed by cutting the box beam 3 are pulled in different directions by the two traction tops 10.

[0053] Among them, the temporary rotating platform is a steel structure, which needs to have high strength.

[0054] According to a further optimization scheme, the oblique cutting direction of the box girder 3 is the maximum radius of rotation of the acute-angle bridge deck of the box girder 3 after cutting.

[0055] Reference Figure 5 The oblique cutting method is adopted to avoid falling objects during construction. At the same time, the oblique cutting direction is the maximum radius of rotation of the 3-angle bridge deck of the box girder after cutting, which can ensure that the two split bodies rotate in opposite directions without affecting each other.

[0056] The existing method for disassembling and rotating a continuous beam bridge across a railway includes the following steps:

[0057] S1. Supporting the box girder 3: Place support members between the two supports 2 and between the box girder 3 and the pier 4;

[0058] S2. Laying the slideway 6: Lay the circular slideway 6 toward the outside of the pier 4, and fix four support legs 7 to the bottom end of the box girder 3;

[0059] S3, set up the traction member: install the traction member on the slide 6;

[0060] S4, cutting box beam 3: obliquely cutting box beam 3;

[0061] S5. Dismantle box girder 3: Start the traction part and separate the two split bodies.

[0062] To further optimize the solution, in step S1, the ball joint 1 and the positioning pin 12 are placed between the two supports 2 and between the box girder 3 and the pier 4. In steps S3-S5, the track 13 is fixed to the slideway 6, the support 2 is removed, the pulley 14 is connected to the support leg 7, and the pulley 14 is placed in the track 13. The pulley 14 is started, and the pulley 14 moves along the track 13 to separate the two split bodies.

[0063] It can be understood that a ball joint 1 is placed between the two supports 2, and the support of the box girder 3 is achieved by adjusting the height of the ball joint 1. A circular slide 6 is laid to the outside of the pier 4, a circular track is fixed in the slide groove, four legs 7 are fixed to the bottom end of the box girder 3, and the support 2 is removed. A pulley 14 is connected under the leg 7, and the pulley 14 slides in the track 13. The box girder 3 is cut obliquely so that the two cut parts are respectively connected to the two traction tops 10. The box girder 3 is cut according to the position where the acute angle bridge deck of the box girder 3 after cutting is the maximum radius of rotation, so that a complete box girder 3 is cut into two parts, ensuring that the two parts can rotate in opposite directions later. Start the power device connected to the pulley 14, and the pulley 14 moves through the track 13 to rotate the two parts to a position convenient for disassembly and assembly, and then carry out the final disassembly and assembly work.

[0064] To further optimize the solution, in step S1, the ball joint 1, the positioning pin shaft 12, and the upper turntable 8 are placed between the two supports 2 and between the box girder 3 and the pier 4. In steps S3-S5, two temporary rotating platforms 11 are set up outside the slideway 6, and the traction top 10 is fixed on the temporary rotating platform 11, and the traction top 10 and the upper turntable 8 are connected. The two traction tops 10 are started to separate the two split bodies.

[0065] It can be understood that the ball joint 1, the upper turntable 8 and the positioning pin shaft 12 are placed between the two supports 2 and between the box girder 3 and the pier 4. The support of the box girder 3 is achieved by adjusting the height of the ball joint 1. A circular slide 6 is laid to the outside of the pier 4, four support legs 7 are fixed to the bottom end of the box girder 3 and the support legs 7 are placed in the slide 6, and the supports 2 are removed. A circular slide 6 is laid on the outside of the pier 4, and support legs 7 are set at the bottom end of the box girder 3 according to the positions of the two split bodies, and the support legs 7 are fixed to the box girder 3. At the same time, the bottom of the support legs 7 needs to be located in the slide 6 and slidably connected to the slide 6 through the tetrafluoroethylene plate 16. Two temporary swivel platforms 11 are set up on the periphery of the slide 6, and the traction top 10 is fixed to the temporary swivel platform 11, connecting the traction top 10 and the upper turntable 8. A temporary rotating platform 11 made of steel is set up on the outside of the slideway 6. The temporary rotating platform 11 is used to support the traction top 10 so that the traction top 10 has a certain height. After the traction top 10 is fixed, the traction end of the traction top 10 is connected to the upper turntable 8. The box girder 3 is cut obliquely so that the two cut segments are connected to the two traction tops 10 respectively. The box girder 3 is cut according to the position where the acute angle of the bridge deck of the cut box girder 3 is the maximum radius during rotation, so that a complete box girder 3 is cut into two segments, ensuring that the two segments can subsequently rotate in opposite directions. The two traction tops 10 are started to separate the two segments. The traction ends of the two traction tops 10 are started, and the two segments are rotated to a position convenient for disassembly and assembly by the power of the traction tops 10, and then the final disassembly and assembly work is carried out.

[0066] Furthermore, before placing the ball joint 1 and the positioning pin 12, the inner wall of the box beam 3 is reinforced. In order to prevent the two split bodies from being damaged during the rotation process, steel or concrete can be used to reinforce the inner wall of the box beam 3 before construction to prevent the box beam 3 from being broken during the rotation process and affecting normal driving.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying 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 on the present invention.

[0068] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. The existing cross-railway continuous beam bridge rotation and disassembly device is characterized by: include, A support member is provided between the bottom end of the box beam (3) and the pier (4), and is located on the central axis of the box beam (3), and is used to support the box beam (3); A traction member, wherein the box beam (3) is obliquely divided into two split bodies, the traction member is used to pull the two split bodies, and the two split bodies move in opposite directions through the traction member; A slideway (6) is provided below the box beam (3), and both of the split bodies are slidably connected to the slideway (6); The slideway (6) is arranged in a circular ring shape, the cross section of the slideway (6) is groove-shaped and is sleeved on the outside of the pier (4), the bottom end of the slideway (6) is fixedly connected to a support pipe (5), the support pipe (5) is used to support the slideway (6), the support pipe (5) is connected to the pier (4) through a connecting rod (15), four support legs (7) are provided at the bottom end of the web of the box beam (3), the four support legs (7) are located in the slideway (6) and are slidably connected to the slideway (6), and the top end of the support leg (7) is fixedly connected to the bottom end of the web of the box beam (3); The support member includes a ball joint (1), the bottom end of the ball joint (1) is fixed to the top end of the pier (4), the top end of the ball joint (1) is fixed to the bottom end of the box girder (3) and corresponds to the central axis of the box girder (3), the ball joint (1) is located between two supports (2), the supports (2) are used to connect the bottom end of the box girder (3) and the top end of the pier (4), a positioning pin shaft (12) is fixed to the pier (4), and the positioning pin shaft (12) is located at the center of the ball joint (1); The traction member includes a track (13) fixed to the inner wall of the bottom end of the slideway (6); the bottom end of the support leg (7) is connected to a pulley (14); the pulley (14) is located in the track (13), and the pulley (14) is slidably connected to the slideway (6) through the track (13); The support member includes a ball joint (1), the bottom end of the ball joint (1) is fixed to the top end of the pier (4), the top end of the ball joint (1) is fixedly connected to an upper turntable (8), the top end of the upper turntable (8) is fixed to the bottom end of the box girder (3) and corresponds to the central axis of the box girder (3), the ball joint (1) is located between two supports (2), the supports (2) are used to connect the bottom end of the box girder (3) and the top end of the pier (4), a positioning pin shaft (12) is fixedly connected to the pier (4), and the positioning pin shaft (12) is located at the center of the ball joint (1) and the upper turntable (8); The traction member comprises a temporary rotating platform (11), a traction top (10) is fixedly connected to the top of the temporary rotating platform (11), a movable end of the traction top (10) is connected to a traction rope (9), and the end of the traction rope (9) is connected to the upper turntable (8).

2. The rotating and disassembling device for an existing continuous beam bridge across a railway according to claim 1 is characterized in that: The oblique cutting direction of the box beam (3) is the maximum radius of rotation of the acute-angle bridge deck of the box beam (3) after cutting.

3. A method for rotating and disassembling an existing continuous beam bridge across a railway, the device for rotating and disassembling an existing continuous beam bridge across a railway according to any one of claims 1-2, characterized in that: The steps include: S1. Supporting the box girder (3): placing support members between the two supports (2) and between the box girder (3) and the pier (4); S2. Laying a slideway (6): Laying a circular slideway (6) toward the outside of the pier (4), and fixing four support legs (7) toward the bottom end of the box beam (3); S3, setting up the traction member: installing the traction member on the slideway (6); S4, cutting the box beam (3): cutting the box beam (3) obliquely; S5. Disassembling the box beam (3): Start the traction member to separate the two split bodies.

4. The method for rotating and disassembling an existing continuous beam bridge across a railway according to claim 3, characterized in that: In step S1, a ball joint (1) and a positioning pin shaft (12) are placed between the two supports (2) and between the box beam (3) and the pier (4). In steps S3-S5, a track (13) is fixed in the slideway (6), the support (2) is removed, a pulley (14) is connected to the bottom of the support leg (7), and the pulley (14) is placed in the track (13). The pulley (14) is started, and the pulley (14) moves along the track (13) to separate the two split bodies.

5. The method for rotating and disassembling an existing continuous beam bridge across a railway according to claim 3, characterized in that: In step S1, a ball joint (1), a positioning pin shaft (12), and an upper turntable (8) are placed between the two supports (2) and between the box beam (3) and the bridge pier (4). In steps S3-S5, two temporary rotating platforms (11) are set up on the periphery of the slideway (6), and a traction top (10) is fixed on the temporary rotating platform (11). The traction top (10) and the upper turntable (8) are connected, and the two traction tops (10) are started to separate the two split bodies.

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