A device and method for dismantling a continuous rigid frame bridge across a railway

Abstract

The present invention discloses a rotation and dismantling device and method for a continuous rigid frame bridge across a railway, which is used for a continuous steel frame bridge and includes: a rotation platform, a support and stabilization device, and a traction power device; the rotation platform includes a pile foundation; the pile foundation is arranged below the main beam section of the continuous rigid frame bridge and is arranged around the double thin-walled piers at the bottom of the continuous rigid frame bridge; a temporary rotation platform is set up on top of several of the pile foundations; the support and stabilization device is installed in the center of the temporary rotation platform, and the support and stabilization device is fixedly connected to the temporary rotation platform and the main beam; the traction power device is installed on the support and stabilization device. This application rotates the existing continuous beam bridge across the railway away from the railway through off-road construction, builds a rotation platform, and rotates the main beam in situ to a position where it does not affect traffic and is dismantled, thereby reducing interference with the existing railway.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge demolition, and in particular relates to a rotation and demolition device and method for a continuous rigid frame bridge across a railway. Background Art

[0002] As bridges age, they require maintenance and even reinforcement to ensure their safety and serviceability. When a bridge becomes too old to be reinforced, it must be demolished. Traditional methods for dismantling old bridges include manual chiseling or mechanical crushing. More advanced methods include static crushing or demolition blasting. However, these methods significantly impact the area beneath the bridge and are unable to meet the traffic needs of the lines beneath it.

[0003] Therefore, the present invention provides a method for rotating and dismantling a continuous rigid frame bridge across a railway. Through this method, an old continuous rigid frame bridge can be rotated and the old bridge can be rotated to the outside of the crossed line. The old bridge can be dismantled in a traditional way without affecting the traffic on the route under the bridge. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for dismantling a continuous rigid frame bridge across a railway to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A rotating and dismantling device for a continuous rigid frame bridge across a railway, used for a continuous steel structure bridge, comprising: a rotating platform, a supporting and stabilizing device, and a traction power device;

[0007] The rotating platform includes pile foundations; the pile foundations are arranged below the main beam section of the continuous rigid frame bridge and surround the double thin-walled piers at the bottom of the continuous rigid frame bridge; temporary rotating platforms are set up on top of several of the pile foundations;

[0008] The support and stabilization device is installed at the center of the temporary turntable, and the support and stabilization device is fixedly connected to the temporary turntable and the main beam; the traction power device is installed on the support and stabilization device.

[0009] A pile foundation is installed at the center of the double thin-walled pier; the remaining pile foundations are arranged on the edge of the bottom surface of the temporary rotating platform, and the distances between adjacent pile foundations are the same.

[0010] The supporting and stabilizing device includes a swivel support, a slide and a support leg; the center of the swivel support coincides with the center of the main beam, and a positioning pin is installed through the center of the swivel support; the top end of the positioning pin extends into the main beam, and the bottom end of the positioning pin extends into the pile foundation located at the center of the double thin-walled pier; the slide is fixedly installed on the top surface of the temporary swivel platform; one end of the support leg is slidably set in the slide, and the other end is fixedly connected to the bottom end of the continuous rigid frame bridge box beam.

[0011] The slideway is a circular slideway, and the center of the slideway coincides with the rotation center of the main beam.

[0012] The slideway is coated with lubricant.

[0013] The power traction device includes a circular rotating shaft cast by the double thin-walled piers, a traction reaction seat, a traction rope and a traction top; two traction reaction seats are provided and are evenly installed on the temporary rotating platform, the temporary rotating platform is fixedly connected to the traction top, and each traction top corresponds to a traction reaction seat; the movable end of each traction top is connected to the traction rope; the traction rope is wound around the circular rotating shaft.

[0014] A method for dismantling a continuous rigid frame bridge across a railway, comprising a device for dismantling a continuous rigid frame bridge across a railway, comprising the following steps:

[0015] Install the rotating platform: Arrange the pile foundation and build a temporary rotating platform with the pile foundation and double thin-wall piers;

[0016] Install support and stabilization devices: Install a swivel support at the center of the temporary swivel platform, and connect the main beam and the pile foundation at the center of the double thin-walled pier through the swivel support to prevent horizontal slippage; install slideways and support legs on the temporary swivel platform;

[0017] Install the power traction device: remove the double thin-walled pier portion that is higher than the swivel support, and cast the remaining double thin-walled piers into a circular shaft; install the traction reaction seat on the temporary swivel platform; and wrap the traction rope around the circular shaft;

[0018] Dismantling the main beam: cut off the main beam with the rotating platform and the adjacent main beam, start the traction top, drive the traction rope to rotate the main beam, and then dismantle the main beam.

[0019] Compared with the existing technology, the present invention has the following advantages and technical effects: This application uses off-road construction to rotate the existing continuous beam bridge across the railway away from the top of the railway, build a rotating platform, and rotate the main beam in situ to a position where it does not affect traffic, thereby reducing interference with the existing railway. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0021] Figure 1 Schematic diagram of a continuous rigid frame bridge

[0022] Figure 2 Schematic diagram of the overall structure;

[0023] Figure 3 for Figure 2 AA section diagram;

[0024] Among them, 1. Pile foundation; 2. Double thin-walled pier; 3. Temporary swivel platform; 4. Swivel support; 5. Positioning pin shaft; 6. Slide; 7. Support leg; 8. Circular rotating shaft; 9. Traction reaction seat; 10. Traction rope; 11. Traction top. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] A rotating and dismantling device for a continuous rigid frame bridge across a railway, used for a continuous steel structure bridge, comprising: a rotating platform, a supporting and stabilizing device, and a traction power device;

[0028] The rotating platform includes pile foundations 1; the pile foundations 1 are arranged below the main beam section of the continuous rigid frame bridge and surround the double thin-walled piers 2 at the bottom of the continuous rigid frame bridge; temporary rotating platforms 3 are set up on top of several pile foundations 1;

[0029] A supporting and stabilizing device is installed at the center of the temporary rotating platform 3, and the supporting and stabilizing device is fixedly connected to the temporary rotating platform 3 and the main beam; the traction power device is installed on the supporting and stabilizing device.

[0030] A pile foundation 1 is installed in the center of the double thin-walled pier 2; the remaining pile foundations 1 are arranged on the bottom edge of the temporary rotating platform 3, and the distances between adjacent pile foundations 1 are the same.

[0031] In one embodiment of the present invention, the temporary rotating platform 3 is formed by building a pile foundation 1 and a double thin-walled pier 2 , constructing beams, and laying steel plates.

[0032] The support and stabilization device includes a swivel support 4, a slide 6 and a support leg 7; the center of the swivel support 4 coincides with the center of the main beam, and a positioning pin 5 is installed through the center of the swivel support 4; the top end of the positioning pin 5 extends into the main beam, and the bottom end of the positioning pin 5 extends into the pile foundation 1 located at the center of the double thin-walled pier 2; the slide 6 is fixedly installed on the top surface of the temporary swivel platform 3; one end of the support leg 7 is slidably set in the slide 6, and the other end is fixedly connected to the bottom end of the continuous rigid frame bridge box girder.

[0033] The slideway 6 is a circular slideway, and the center of the slideway 6 coincides with the rotation center of the main beam.

[0034] The slideway 6 is coated with lubricant.

[0035] The power traction device includes a circular rotating shaft 8 cast from a double thin-walled pier 2, a traction reaction seat 9, a traction rope 10 and a traction top 11; two traction reaction seats 9 are provided and are evenly installed on the temporary turntable 3, the temporary turntable 3 is fixedly connected to the traction top 11, and each traction top 11 corresponds to a traction reaction seat 9; the movable end of each traction top 11 is connected to the traction rope 10; the traction rope 10 is wound around the circular rotating shaft 8.

[0036] A method for dismantling a continuous rigid frame bridge across a railway, comprising a device for dismantling a continuous rigid frame bridge across a railway, comprising the following steps:

[0037] Install the rotating platform: Arrange the pile foundation 1, and build a temporary rotating platform 3 with the pile foundation 1 and the double thin-walled pier 2;

[0038] Install the support and stabilization device: Install the swivel support 4 at the center of the temporary swivel platform 3, and connect the main beam and the pile foundation 1 located at the center of the double thin-walled pier 2 through the swivel support 4 to prevent horizontal slippage; install the slide 6 and support legs 7 on the temporary swivel platform 3;

[0039] Install the power traction device: remove the portion of the double thin-walled pier 2 that is higher than the swivel support 4, and cast the remaining double thin-walled pier 2 into a circular shaft 8; install the traction reaction seat 9 on the temporary swivel platform 3; and wrap the traction rope 10 around the circular shaft 8;

[0040] Dismantle the main beam: cut off the main beam with the rotating platform and the main beam adjacent to it, start the traction top 11, drive the traction rope 10 to rotate the main beam, and then dismantle the main beam.

[0041] In one embodiment of the present invention, the lubricant is tetrafluoroethylene.

[0042] In one embodiment of the present invention, the positioning pin shaft 5 is located at the center of the swivel support, with the upper end embedded in the main beam and the lower end embedded in the pile foundation 1, ensuring that the main beam does not slide horizontally during the subsequent main beam rotation process.

[0043] In one embodiment of the present invention, before casting the circular rotating shaft 8, the double thin-walled piers 2 above the swivel support 4 and below the zero block are removed; the double thin-walled piers 2 within 20 cm below the zero block are retained, and the circumscribed circles of the two double thin-walled piers 2 are made. The formwork is supported and concrete is cast so that the original double thin-walled piers 2 become a large circular concrete rotating shaft after the new concrete is poured, which is the circular rotating shaft 8.

[0044] In one embodiment of the present invention, the piers of a continuous rigid frame bridge and a conventional continuous beam bridge differ: While the main beam and piers of a continuous rigid frame bridge are fixed, the piers and main beam of a continuous beam bridge are separate and connected by supports. In a continuous rigid frame bridge, the rotating shaft can be cast using the double thin-walled piers below the beam bottom. However, due to height restrictions, a continuous beam bridge only has one support below the beam bottom, making it impossible to construct a concrete rotating shaft.

[0045] 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.

[0046] 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. A method for dismantling a continuous rigid frame bridge across a railway, using a device for dismantling a continuous rigid frame bridge across a railway, characterized in that: The rotating and dismantling device for the continuous rigid frame bridge across the railway includes a rotating platform, a supporting and stabilizing device and a traction power device; The rotating platform comprises a pile foundation (1); the pile foundation (1) is arranged below the main beam section of the continuous rigid frame bridge and is arranged around the double thin-walled pier (2) at the bottom of the continuous rigid frame bridge; a temporary rotating platform (3) is set up on the top of a plurality of the pile foundations (1); The support and stabilization device is installed at the center of the temporary rotating platform (3), and the support and stabilization device is fixedly connected to the temporary rotating platform (3) and the main beam; the traction power device is installed on the support and stabilization device; The supporting and stabilizing device comprises a swivel support (4), a slideway (6) and a support leg (7); the center of the swivel support (4) coincides with the center of the main beam, and a positioning pin shaft (5) is installed through the center of the swivel support (4); the top end of the positioning pin shaft (5) extends into the main beam, and the bottom end of the positioning pin shaft (5) extends into the pile foundation (1) located at the center of the double thin-walled pier (2); the slideway (6) is fixedly installed on the top surface of the temporary swivel platform (3); one end of the support leg (7) is slidably arranged in the slideway (6), and the other end is fixedly connected to the bottom end of the continuous rigid frame bridge box beam; The traction power device comprises a circular rotating shaft (8) cast by the double thin-walled pier (2), a traction reaction seat (9), a traction rope (10) and a traction top (11); two traction reaction seats (9) are provided and are evenly installed on the temporary rotating platform (3); the temporary rotating platform (3) is fixedly connected to the traction top (11), and each traction top (11) corresponds to a position of the traction reaction seat (9); the movable end of each traction top (11) is connected to the traction rope (10); the traction rope (10) is wound around the circular rotating shaft (8); The method for dismantling a continuous rigid frame bridge across a railway comprises the following steps: Installing the rotating platform: arranging pile foundations (1), and building a temporary rotating platform (3) with the pile foundations (1) and the double thin-walled piers (2); Installing a supporting and stabilizing device: installing a swivel support (4) at the center of the temporary swivel platform (3), connecting the main beam and the temporary swivel platform (3) through the swivel support (4) to prevent horizontal slippage; installing a slideway (6) and a support leg (7) on the temporary swivel platform (3); Installing the traction power device: partially dismantle the double thin-walled pier (2) below the top surface of the swivel support (4), and cast the remaining double thin-walled pier (2) into a circular rotating shaft (8); install a traction reaction seat (9) on the temporary swivel platform (3); and wrap a traction rope (10) around the circular rotating shaft (8); Dismantling the main beam: cut off the main beam on which the rotating platform is built and the main beam adjacent to it, start the traction top (11), drive the traction rope (10) to rotate the main beam, and then dismantle the main beam.

2. The method for dismantling a continuous rigid frame bridge across a railway according to claim 1, characterized in that: One pile foundation (1) is installed at the center of the double thin-wall pier (2); the remaining pile foundations (1) are arranged at the bottom edge of the temporary rotating platform (3), and the distances between adjacent pile foundations (1) are the same.

3. The method for dismantling a continuous rigid frame bridge across a railway according to claim 1, characterized in that: The slideway (6) is a circular slideway, and the center of the slideway (6) coincides with the rotation center of the main beam.

4. The method for dismantling a continuous rigid frame bridge across a railway according to claim 1, characterized in that: The slideway (6) is coated with lubricant.

Images