Ballastless track single-track tunnel roadbed slab concrete pouring device and pouring method

Abstract

The ballastless track single-track tunnel roadbed slab concrete pouring device comprises a portal frame structure and a hopper, a track is laid on the bottom side of the portal frame structure, a driving wheel set used for moving on the track is arranged at the bottom of the portal frame structure, and a lifting mechanism, a pulley system and a water tank are arranged at the top of the portal frame structure; the hopper is located between the portal structures, the two sides of the hopper are matched with the lifting mechanism through a pulley system and a cable to move, a stirring device is arranged in the hopper, and the two sides of the bottom of the hopper are each provided with a vibrator and a scraper; the water tank is provided with a high-pressure water gun. According to the pouring device and method, the problems that when a gantry crane moves front and back, due to the fact that the construction distance is long, discharging of a hopper is uneven and unstable, a discharging switch needs to be manually operated, and frequent transportation is needed due to the small hopper capacity can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway roadbed slab construction methods, and in particular to a ballastless track single-line tunnel roadbed slab concrete pouring device and pouring method. Background Art

[0002] At present, during the concrete pouring process of the double-block ballastless track slab, the concrete is poured into the mold through a gantry crane with a hopper, which is generally 1.5m 3 capacity, and there is only one discharge port. Construction workers operate the gantry crane to lift the hopper to the pouring site, and then manually open the discharge port switch to distribute the material. The concrete is poured in a zigzag order and evenly distributed. During the pouring process, the gantry crane needs to be operated to move forward and backward, and the hoist needs to be operated to move the material left and right. The discharge is uneven and unstable. During the distribution process, four workers are required to support the hopper to prevent it from swinging left and right, and to control the flow rate by manually opening and closing the discharge port switch at any time. After the concrete is discharged, the discharge port needs to be closed manually. Due to the strength of the construction workers, it is not easy to open and close the discharge port, and the hopper capacity is small, so frequent material transportation is required, which affects the quality of the roadbed and appearance, and the construction efficiency is not high. Therefore, there is an urgent need for a pouring device and pouring method that can solve the problems of uneven and unstable hopper discharge due to the long construction distance when the gantry crane moves forward and backward, the need for manual operation of the discharge switch, and the need for frequent transportation of the small hopper capacity. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a casting device and casting method that can solve the problems of uneven and unstable hopper material discharge when the gantry crane moves forward and backward due to the long construction distance, the need for manual operation of the material discharge switch, and the small hopper capacity requiring frequent transportation.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A ballastless track single-line tunnel slab concrete pouring device comprises a gantry structure and a hopper, wherein a track is laid on the bottom side of the gantry structure, a driving wheel set for moving on the track is provided at the bottom of the gantry structure, and a lifting mechanism, a pulley system and a water tank are provided at the top of the gantry structure; the hopper is located between the gantry structures, and both sides of the hopper move in coordination with the lifting mechanism by means of a pulley system and a cable, a stirring device is provided in the hopper, and a vibrator and a scraper are provided on both sides of the bottom of the hopper; a high-pressure water gun is provided on the water tank.

[0006] Furthermore, the hopper is composed of two inverted triangular pyramid silos, each of which has a width of 2.5m, a length of 5m, a height of 1.6m, and a capacity of 3.2m 3There are at least six discharge ports of the hopper. The two discharge ports in the middle are 0.3m wide and are located at the bottom of each silo. The four discharge ports on the side are 0.2m wide and are located on both sides of each silo.

[0007] Furthermore, the pulley system includes a fixed pulley and a movable pulley, the two fixed pulleys are arranged on the top of the portal structure, and the two movable pulleys are arranged on both sides of the hopper, and the cables connecting the fixed pulley and the movable pulley on the same side are pulled through the lifting mechanism.

[0008] Furthermore, a load-bearing beam is fixedly provided on the top frame of the portal structure.

[0009] Also included is a method for pouring concrete for a ballastless track single-track tunnel roadbed slab, based on a ballastless track single-track tunnel roadbed slab concrete pouring device, comprising the following steps:

[0010] (1) Before construction, store water in the water tank in advance, use a high-pressure water gun to moisten the inner wall of the hopper and keep the hopper free of water;

[0011] (2) After the concrete is transported to the site by a transport vehicle, the slump, air content and mold entry temperature of each truck of concrete are tested. After passing the test, the lifting mechanism is used to lower the hopper to the side of the transport vehicle and pour the concrete into the hopper;

[0012] (3) Start the mixing device, lift the hopper so that its height exceeds the track by more than 500mm, operate the gantry structure to move the hopper to the concrete pouring site, lower the hopper, open the discharge port, and move the hopper back and forth at a constant speed to ensure that the concrete is evenly poured into the mold until the concrete in the hopper is poured;

[0013] (4) Start the vibrator, adjust the scraper height, move the hopper at a constant speed, vibrate and level the concrete, and repeat the operation until the surface finishing effect of the roadbed plate meets the requirements.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The hopper of the present invention is provided with a plurality of discharge ports at the bottom, which can accurately control the discharge position and flow of materials such as concrete. A stirring device is installed in the hopper to prevent the segregation of materials during storage. The hopper is lifted and lowered by the cooperation of a lifting mechanism and a pulley system, which is conducive to loading and unloading operations. A vibrator and a scraper are provided under the hopper to vibrate and compact the surface of the material after discharge and to smooth it. The use of this device and method can improve the efficiency and accuracy of material distribution in ballastless track construction, ensure the quality of track structure construction, reduce manual labor intensity, and can feed and distribute materials while walking along the track, which can facilitate tunnel construction and make construction more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 A top view of the present invention;

[0018] Figure 3 It is a side view of the present invention.

[0019] Reference numerals:

[0020] 1- driving wheel set, 2- gantry structure, 3- lifting mechanism, 4- load-bearing beam, 5- pulley system, 6- hopper, 7- water tank, 8- stirring device, 9- track, 10- vibrator. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] like Figures 1 to 3 As shown, a ballastless track single-line tunnel roadbed slab concrete pouring device includes a portal structure 2 and a hopper 6. A track 9 is laid on the bottom side of the portal structure 2, and a driving wheel group 1 for moving on the track 9 is provided at the bottom of the portal structure 2. A lifting mechanism 3, a pulley system 5 and a water tank 7 are provided on the top of the portal structure 2; the hopper 6 is located between the portal structures 2, and the two sides of the hopper 6 are moved in coordination with the lifting mechanism 3 by providing a pulley system 5 and a cable. A stirring device 8 is provided in the hopper 6, and a vibrator 10 and a scraper are provided on both sides of the bottom of the hopper 6; a high-pressure water gun is provided on the water tank 7.

[0023] The hopper 6 is composed of two inverted triangular pyramid silos, each of which has a width of 2.5m, a length of 5m, a height of 1.6m, and a capacity of 3.2m. 3 Compared to a single hopper, the capacity is higher. Hopper 6 has at least six discharge ports. The two central discharge ports are 0.3m wide and located at the bottom of each silo. The four side discharge ports are 0.2m wide and located on both sides of each silo. Multiple discharge ports can precisely control the uniform delivery of concrete to both sides and the center of the roadbed slab, as well as the speed at which the concrete falls.

[0024] The pulley system 5 includes a fixed pulley and a movable pulley. The two fixed pulleys are arranged on the top of the gantry structure 2, and the two movable pulleys are arranged on both sides of the hopper 6. The cables connecting the fixed pulley and the movable pulley on the same side are pulled by the lifting mechanism 3. The hopper 6 is pulled by the lifting mechanism 3 to drive the movable pulley to lift or lower the hopper 6. The lifting speed of the hopper 6 is preferably set to 4m / min.

[0025] Among them, a load-bearing beam 4 is fixedly provided on the top frame of the portal structure 2, which can improve the load of the portal structure 2 as a whole.

[0026] The pouring method of the present invention is as follows:

[0027] (1) Before construction, water is stored in the water tank 7 in advance, and the inner wall of the hopper 6 is moistened with a high-pressure water gun to ensure that there is no water in the hopper 6.

[0028] (2) After the concrete is transported to the site by a transport vehicle, the slump, air content and mold entry temperature of each truck of concrete are tested. If qualified, the lifting mechanism 3 is operated to lower the hopper 6 and move it to the side of the transport vehicle, and the concrete is poured into the hopper 6.

[0029] (3) Start the mixing device 8, lift the hopper 6 so that its height exceeds the track by more than 500 mm, operate the gantry structure 2 to move the hopper 6 to the concrete pouring location, lower the hopper 6, open the discharge port, and move the hopper 6 back and forth at a constant speed to ensure that the concrete is evenly poured into the mold until the concrete in the hopper 6 is completely poured. In order to facilitate accurate control of the discharge amount of concrete, it is preferably set to a discharge port with a controllable opening size.

[0030] (4) Start the vibrator 10, adjust the scraper height, and move the hopper 6 at a constant speed to vibrate and level the concrete. Repeat the operation until the surface finish of the roadbed slab meets the requirements. Continue to repeat the above steps until the construction is completed.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ballastless track single-line tunnel slab concrete pouring device, comprising a portal structure (2) and a hopper (6), characterized in that: A track (9) is laid on the bottom side of the gantry structure (2), a driving wheel group (1) for moving on the track (9) is provided at the bottom of the gantry structure (2), and a lifting mechanism (3), a pulley system (5) and a water tank (7) are provided on the top of the gantry structure (2); the hopper (6) is located between the gantry structures (2), and both sides of the hopper (6) move in coordination with the lifting mechanism (3) by providing a pulley system (5) and a cable, a stirring device (8) is provided in the hopper (6), and a vibrator (10) and a scraper are provided on both sides of the bottom of the hopper (6); and a high-pressure water gun is provided on the water tank (7).

2. The ballastless track single-track tunnel slab concrete pouring device according to claim 1, characterized in that: The hopper (6) is composed of two inverted triangular pyramid silos, each of which has a width of 2.5m, a length of 5m, a height of 1.6m, and a capacity of 3.2m 3 The hopper (6) is provided with at least six discharge ports, the two discharge ports arranged in the middle are 0.3m wide and are located at the bottom of each silo, and the four discharge ports arranged on the side are 0.2m wide and are located on both sides of each silo.

3. The ballastless track single-track tunnel slab concrete pouring device according to claim 1, characterized in that: The pulley system (5) includes a fixed pulley and a movable pulley, wherein the two fixed pulleys are arranged on the top of the gantry structure (2), and the two movable pulleys are arranged on both sides of the hopper (6), and the cables connecting the fixed pulley and the movable pulley on the same side are pulled through the lifting mechanism (3).

4. The ballastless track single-track tunnel slab concrete pouring device according to claim 1, characterized in that: A load-bearing beam (4) is fixedly provided on the top frame of the portal structure (2).

5. A method for pouring concrete for a ballastless track single-track tunnel slab, based on the device for pouring concrete for a ballastless track single-track tunnel slab according to any one of claims 1 to 4, characterized in that: Here are the steps: (1) Before construction, water is stored in the water tank (7), and the inner wall of the hopper (6) is moistened with a high-pressure water gun to ensure that there is no water in the hopper (6); (2) After the concrete is transported to the site by a transport vehicle, the slump, air content and mold entry temperature of each truck of concrete are tested. After passing the test, the lifting mechanism (3) is operated to lower the hopper (6) to the side of the transport vehicle, and the concrete is poured into the hopper (6); (3) Start the mixing device (8), lift the hopper (6) so that its height exceeds the track (9) by more than 500 mm, operate the gantry structure (2) to move the hopper (6) to the concrete pouring location, lower the hopper (6), open the discharge port, and move the hopper (6) back and forth at a constant speed to ensure that the concrete is evenly poured into the mold until the concrete in the hopper (6) is completely poured; (4) Start the vibrator (1), adjust the scraper height, move the hopper (6) at a constant speed, and perform concrete vibrating and scraping. Repeat the operation until the surface finishing effect of the roadbed plate meets the requirements.

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