Rapid Demolition Device and Blasting Method for Concrete in the Anchorage Zone of Expansion Joints on High-Grade Highways

Abstract

This invention discloses a rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways. A foldable drill frame is installed in the anchorage zone, and several water drills are mounted on the foldable drill frame. The water drills drill multiple holes in the anchorage zone, and a breaker is installed inside each hole. The breaker is sealed by a plug located at the end of the hole. The breaker is led out of the hole through individual firing lines, which are connected in series to a main firing line. This rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways can reduce the removal time to within 1.5 hours, saving 1.5 to 2.5 hours compared to traditional manual pneumatic hammer removal, and reducing the labor intensity for workers.

Description

Technical Field

[0001] This invention relates to a rapid demolition device and blasting method for concrete in the anchorage zone of expansion joints on high-grade highways, and belongs to the field of construction. Background Technology

[0002] With the rapid development of my country's economy, my country now has the world's longest network of high-grade highways. During the use of high-grade highways, expansion joints need to be maintained and repaired. During maintenance and repair, the concrete in the anchorage zone of the original expansion joints needs to be removed.

[0003] Currently, the removal of concrete in the anchorage zone of expansion joints in China is mostly done manually using pneumatic hammers. This method has the advantages of simple equipment, easy operation, and minimal boundary damage, but its biggest drawbacks are low construction efficiency, long processing time, and high labor intensity for workers. Generally, for a 3.75-meter lane, manual removal takes about 3-4 hours, accounting for 1 / 3 to 1 / 4 of the replacement and maintenance time. Ordinary blasting devices are used in large mines and abandoned buildings; due to the small area of ​​the anchorage zone, there are no similar blasting devices available for expansion joint anchorage zones. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a rapid concrete breaking device for the anchorage zone of expansion joints in high-grade highways, which can reduce the breaking time of the anchorage zone to within 1.5 hours, saving 1.5 to 2.5 hours compared with traditional manual pneumatic hammer breaking, and reducing the labor intensity of workers.

[0005] Technical Solution: To solve the above-mentioned technical problems, the present invention provides a rapid concrete breaking device for the anchorage zone of expansion joints in high-grade highways. A foldable drill frame is provided on the anchorage zone, and several water drills are provided on the foldable drill frame. The water drills drill multiple holes in the anchorage zone, and a breaker is installed in the hole. The breaker is sealed by a plug located at the end of the hole. The breaker is led out of the hole through a series of firing lines, and the series of firing lines are connected to the main firing line.

[0006] Preferably, the crusher is a carbon dioxide crusher.

[0007] Preferably, a sound-absorbing protective cover is installed on the anchoring area.

[0008] Preferably, the silencing shield includes a semi-circular steel cover and a gun cover, with the gun cover located inside the semi-circular steel cover.

[0009] Preferably, the semi-circular steel cover is provided with several vent holes.

[0010] Preferably, the sealing plug includes a rubber ring and a reducing bolt, with a conical hole in the center of the rubber ring and the reducing bolt located inside the conical hole.

[0011] A blasting method for rapidly removing concrete in the anchorage zone of expansion joints on high-grade highways includes the following steps:

[0012] (1) Move the detachable stackable drill frame to the anchorage area to be broken, unfold the drill frame, position it, the edge of the hole is 50mm from the retention area, 330mm from one end of the anchorage area, the hole spacing is 430mm, turn on the cooling water and start drilling, determine the drilling depth according to the thickness of the anchorage area, the hole depth is the anchorage thickness minus 20mm, after 20 minutes, the hole is formed, and the anchorage areas on both sides of the tension joint are drilled at the same time.

[0013] (2) Select the carbon dioxide crusher model based on the thickness of the anchoring zone and the hole depth;

[0014] (3) Insert the selected carbon dioxide crusher into the hole and lead the firing line out of the hole;

[0015] (4) Insert the self-locking sealing plug into the hole, tighten it with a wrench, and secure it;

[0016] (5) Connect the firing lines of each crusher in series with the main firing line.

[0017] (6) Install the sound-absorbing protective covers in the anchorage area to ensure full coverage of the anchorage area, and connect the four protective covers with iron chains.

[0018] (7) After the crusher is set up, personnel should be moved to a distance of more than 20m.

[0019] (8) When there are no vehicles passing through the area to be broken within 50m, the breaker is fired. The breaker takes effect within 0.4 seconds and breaks the concrete in the anchoring area.

[0020] Beneficial effects: The blasting method of the rapid concrete removal device for the anchorage zone of high-grade highway expansion joints of the present invention has the following advantages:

[0021] 1. Time saving: This technology can reduce the time for breaking the anchorage zone to within 1.5 hours, which is 1.5 to 2.5 hours shorter than traditional manual pneumatic hammer breaking.

[0022] 2. Saves labor and reduces labor intensity: Drilling is done mechanically, and manual labor is only required for setting up a crusher, which is time-saving and low-intensity.

[0023] 3. Green and Environmentally Friendly: The drilling process uses water drilling, generating no dust. The anchoring zone breaking utilizes high-pressure gas generated from the vaporization of liquid carbon dioxide to break the concrete; this process is a physical change, and carbon dioxide is stable and pollution-free. Only a small amount of black powder is used in the firing device. A protective soundproof cover is used to keep the breaking noise within acceptable environmental limits, minimizing its impact on normal traffic. The breaker is reusable; only the breaking discs and firing device are consumables. After use, the breaker can be refilled with carbon dioxide and reused.

[0024] 4. The main materials used are readily available and safe and reliable: The crusher mainly uses carbon dioxide, which is readily available, not a dangerous good, and not subject to regulation. It is safe and reliable to store, handle, and use under normal circumstances. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the system composition of the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of the sound-absorbing protective cover.

[0027] Figure 3 This is a schematic diagram of the structure of the present invention;

[0028] Figure 4 This is a bottom view schematic diagram of the structure of the present invention;

[0029] Figure 5 The structure of this invention Figure 1 Enlarged diagram of point A in the middle.

[0030] In the diagram: 1. Main drill frame, 2. Secondary drill frame, 3. Connecting key, 4. Moving groove, 5. Positioning slot, 6. Moving block, 7. Connecting block, 8. Hollow cavity, 9. Moving frame, 10. Guide groove, 11. Pressure chamber, 12. Movable rod, 13. Guide block, 14. Movable plate, 15. Pressure spring, 16. Pull rod, 17. Drill bit, 21. Blasting cover, 22. Steel cover, 31. Breaker, 32. Silencing cover, 33. Sealing plug, 34. Firing line. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] like Figures 1 to 5 As shown, a rapid concrete breaking device for the anchorage zone of a high-grade highway expansion joint is provided. A foldable drill frame is set on the anchorage zone, and several water drills are provided on the foldable drill frame. The water drills drill multiple holes in the anchorage zone. A breaker 31 is installed in the drill hole. The breaker 31 is sealed by a sealing plug 33 located at the end of the drill hole. The breaker 31 is led out of the drill hole through the individual firing lines 34. The individual firing lines 34 are connected in series and then connected to the main firing line.

[0033] In this invention, the drilling equipment employs eight water drills arranged in a straight line, with a 430mm interval between each drill. The eight drills are fixed on a mobile hydraulic lifting drill frame and controlled by an operator's panel. Simultaneous drilling, cooling water supply, and lifting ensure accurate hole positioning and consistent depth. The drill diameter is 80mm. The drilling depth is adjustable from 150mm to 400mm depending on the type of expansion joint. Drilling time: no more than 20 minutes. The carbon dioxide breaker 31 includes a firing device, compressed carbon dioxide, and a detonating disc. The liquid carbon dioxide is ignited by the firing device, instantly vaporizing and generating an ultra-high pressure of 400-900MPa, far exceeding the strength of the anchored concrete (C50-C70), thus breaking up the concrete for easy cleaning. The carbon dioxide breaker has an outer diameter of 76mm and a height of 100mm-320mm. Different specifications are selected according to the different thicknesses of the anchoring zone. Crushing power: The crushing width is not less than 250mm and not more than 500mm. Different specifications are selected according to the width of the anchoring zone.

[0034] In this invention, to enhance the carbon dioxide crushing effect and reduce the impact on the surrounding environment, a self-locking sealing plug 33 is installed at the orifice. The sealing plug comprises a rubber ring and a reducing bolt. A conical hole is formed in the center of the rubber ring, and the reducing bolt is located within the conical hole. The reducing bolt is screwed into the conical hole, and the rubber ring is compressed to achieve the sealing purpose. Diameter: 78mm, Height: 80mm, Reducing bolt outer diameter: 10mm, length: 90mm, tail diameter: 14mm. Material: Hard rubber. Grooving: A 60mm groove with a 2mm width is cut into the lower part of the hard rubber, with 4-6 grooves symmetrically cut. Hole: A conical hole is cut in the center of the rubber, with a lower diameter of 15mm and an upper diameter of 11mm.

[0035] In this invention, the sound-absorbing protective cover 32 is as follows: Figure 2 As shown, it includes a steel cover 22 and a gun cover 21. The outer shell of the protective cover, i.e., the steel cover 22, is machined from a 6mm perforated steel plate with 8mm holes and a hole spacing of 20mm. The protective cover contains a double-layer gun cover 21, which is made from old tires.

[0036] In this invention, the foldable support includes a main drill frame 1. Secondary drill frames 2 are movably connected to both the left and right sides of the main drill frame 1 via connecting keys 3. There are four connecting keys 3 in total, divided into two groups of two, with each group of two keys symmetrically distributed. Both groups of two keys 3 are hinged to the secondary drill frames 2 and the main drill frame 1. Two movable grooves 4 are provided at the bottom of the secondary drill frame 2 and the top of the main drill frame 1. The movable grooves 4 are rectangular. The width of the groove on the opposite side of the upper and lower movable grooves 4 is smaller than the width of the groove on the opposite side of the upper and lower movable grooves 4. Positioning slots 5, respectively opened inside the secondary drill frame 2 and the main drill frame 1, are installed on the opposite side of the upper and lower movable grooves 4. Movable blocks 6 are movably connected inside the movable grooves 4. The unit has two pressure chambers 11, which correspond one-to-one with two movable frames 9. Movable rods 12, penetrating the pressure chambers 11 and extending into the positioning slots 5, are movably connected inside each movable frame 9. Movable plates 14, located inside the pressure chambers 11, are sleeved around the movable rods 12. Pressure springs 15, connected to the inner walls of the pressure chambers 11, are fixedly connected to opposite sides of the upper and lower movable plates 14. Connecting blocks 7 are fixedly connected between the upper and lower movable blocks 6. A hollow cavity 8 is formed inside the connecting block 7. Two movable frames 9, rectangular frames, are movably connected inside the hollow cavity 8. Pull rods 1, extending into the hollow cavity 8 and connected to the movable frames 9, are inserted into opposite sides of the connecting blocks 7 on both sides. 6. Two interconnected movable frames 9 are movably connected inside the connecting block 7. Guide grooves 10 are provided on both the front and rear side walls of the movable frame 9. There are sixteen guide grooves 10 in total, arranged in four rows of four. Each row consists of two groups of two guide grooves 10, symmetrically distributed. The left and right side walls of each guide groove 10 are inclined surfaces with an inclination angle of sixty degrees. A movable rod 12 is movably connected inside the movable frame 9, penetrating the movable block 6 and extending into the positioning slot 5. Guide blocks 13 extending into the guide grooves 10 are fixedly connected to both the front and rear side walls of the movable rod 12. A movable plate 14 located inside the movable block 6 is sleeved on the outside of the movable rod 12. The upper and lower sides are movable... On opposite sides of plate 14, pressure springs 15 connected to movable blocks 6 are fixedly connected. On opposite sides of connecting blocks 7 on both sides, pull rods 16 connected to movable frames 9 are inserted. Drill bits 17 are fixedly connected to the bottom of main drill frame 1 and the top of secondary drill frame 2. By pulling pull rods 16, movable frames 9 are moved. When movable frames 9 move, movable rods 12 move towards movable frames 9 under the combined action of guide grooves 10 and guide blocks 13, thereby separating movable rods 12 from positioning slots 5. At this time, the upper movable block 6 and connecting block 7 can be separated from the upper movable groove 4. By rotating secondary drill frame 2, it is leveled. After secondary drill frame 2 is leveled, moving connecting block 7 moves the lower movable block 6 into the movable groove 4 inside secondary drill frame 2.During this process, when the moving block 12 moves to the position of the positioning slot 5, the movable rod 12 and the movable plate 14 are subjected to the pressure of the pressure spring 15, thereby making the movable rod 12 fit tightly against the positioning slot 5, thus connecting the secondary drilling frame 2 with the main drilling frame 1. This device, through a series of mechanical structures, allows the secondary drilling frame 2 and the main drilling frame 1 to be folded up, reducing the size of the device and making it more convenient to transport and move.

[0037] In summary, this foldable mobile multi-arm water drill for highway drilling uses a pull rod 16 to move the moving frame 9. As the moving frame 9 moves, the movable rod 12 moves towards the moving frame 9 under the combined action of the guide groove 10 and the guide block 13, thus separating the movable rod 12 from the positioning slot 5. At this point, the upper moving block 6 and connecting block 7 can be separated from the upper moving groove 4. By rotating the secondary drilling frame 2 to flatten it, and then moving the connecting block 7, the lower moving block 6 moves into the moving groove 4 inside the secondary drilling frame 2. During this process, when the moving block 12 moves to the position of the positioning slot 5, the movable rod 12 and the movable plate 14 are subjected to the pressure of the pressure spring 15, causing the movable rod 12 to fit tightly into the positioning slot 5, thus connecting the secondary drilling frame 2 with the main drilling frame 1. This device, through a series of mechanical structures, allows the secondary drilling frame 2 and the main drilling frame 1 to be folded, reducing the size of the device and making it more convenient to transport and move, thus solving the problem of inconvenient transportation and movement.

[0038] The construction process of a rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways includes the following steps:

[0039] 1. Move the detachable stackable drill rig to the area to be broken up, unfold the drill rig, and position it. The edge of the hole should be 50mm from the retention area and 330mm from one end of the anchorage area, with a hole spacing of 430mm. Start drilling after connecting the cooling water. Determine the drilling depth based on the thickness of the anchorage area; the hole depth should be the anchorage thickness minus 20mm. The hole will be formed after approximately 20 minutes. Drilling can begin simultaneously in the anchorage areas on both sides of the tension joint.

[0040] 2. Select the carbon dioxide breaker model based on the thickness of the anchoring zone and the hole depth.

[0041] 3. Insert the selected carbon dioxide crusher into the hole and lead the firing line out of the hole.

[0042] 4. Insert the self-locking sealant into the hole, tighten it with a wrench, and secure it.

[0043] 5. Connect the firing lines of each crusher in series to the main firing line.

[0044] 6. Install the sound-absorbing protective covers in the anchorage area to ensure full coverage of the anchorage area, and connect the four protective covers with iron chains.

[0045] 7. After the crusher is set up, personnel should move to a distance of more than 20 meters.

[0046] 8. When no vehicles are passing through the area to be broken within 50m, the breaker is fired. The breaker will take effect within 0.4 seconds and break the concrete in the anchoring area.

[0047] 9. Post-cleanup.

[0048] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways, characterized in that: A foldable drill frame is installed in the anchoring area, and several water drills are mounted on the foldable drill frame. The water drills drill multiple holes in the anchoring area, and a breaker is installed in each hole. The breaker is sealed by a plug located at the end of the hole. The breaker is led out of the hole through a series of firing lines, which are then connected in series to the main firing line. The foldable drill frame includes a main drill frame, and secondary drill frames are movably connected to both sides of the main drill frame via connecting keys. Two movable grooves are provided at the bottom of the secondary drill frames and the top of the main drill frame. Positioning slots, respectively located inside the secondary drill frames and the main drill frame, are installed on opposite sides of the movable grooves on both sides. Movable blocks are movably connected inside the movable grooves, and connecting blocks are fixedly connected between the upper and lower sides. The block has two interconnected movable frames internally connected to it. Guide grooves are provided on the front and rear side walls of each movable frame. A movable rod, penetrating the movable block and extending into a positioning slot, is movably connected inside each movable frame. Guide blocks extending into the guide grooves are fixedly connected to the front and rear side walls of the movable rod. A movable plate located inside the movable block is sleeved on the outside of the movable rod. Pressure springs connected to the movable block are fixedly connected to opposite sides of the upper and lower movable plates. Pull rods connected to the movable frames are inserted into opposite sides of the left and right connecting blocks. Drill bits are fixedly connected to the bottom of the main drill frame and the top of the secondary drill frame. The breaker is a carbon dioxide breaker. A sound-absorbing protective cover is installed on the anchoring area.

2. The rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways according to claim 1, characterized in that: The silencing shield includes a semi-circular steel cover and a gun cover, with the gun cover located inside the semi-circular steel cover.

3. The rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways according to claim 2, characterized in that: The semi-circular steel cover is provided with several vent holes.

4. The rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways according to claim 1, characterized in that: The sealing plug includes a rubber ring and a reducing bolt. A conical hole is provided in the center of the rubber ring, and the reducing bolt is located inside the conical hole.

5. The rapid concrete removal device for the anchorage zone of expansion joints in high-grade highways according to claim 1, characterized in that: There are four connecting keys in total, divided into two groups, left and right. Each group has two connecting keys symmetrically distributed, and both connecting keys in each group are hinged to the secondary drill frame and the main drill frame. Each connecting block has a hollow cavity inside, and two movable frames are movably connected within the hollow cavity. The movable frames are rectangular frames, and on opposite sides of each connecting block, a tie rod extending into the hollow cavity and connected to the movable frame is inserted. Each movable block has two pressure chambers inside, with a one-to-one correspondence between the two pressure chambers and the two movable frames. The movable frames are movably connected to the pressure chambers by connecting rods that extend to a fixed point. The movable rod inside the slot is sleeved with a movable plate located inside the pressure chamber. Pressure springs connected to the inner wall of the pressure chamber are fixedly connected to the opposite sides of the movable plates on both the upper and lower sides. There are sixteen guide grooves in total, arranged in four rows. Each row of four guide grooves is divided into two groups, with two guide grooves in each group symmetrically distributed. The left and right side walls of each guide groove are inclined surfaces with an inclination angle of sixty degrees. The movable groove is a rectangular groove, and the width of the groove on the opposite side of the upper and lower movable grooves is smaller than the width of the groove on the opposite side of the upper and lower movable grooves.

6. A blasting method using the rapid demolition device for concrete in the anchorage zone of expansion joints on high-grade highways as described in any one of claims 1 to 5, characterized in that, Includes the following steps: (1) Move the detachable stackable drill frame to the anchorage area to be broken, unfold the drill frame, position it, the edge of the hole is 50mm from the retention area, 330mm from one end of the anchorage area, the hole spacing is 430mm, start drilling after connecting the cooling water, determine the drilling depth according to the thickness of the anchorage area, the hole depth is the anchorage thickness minus 20mm, after 20 minutes, the hole is formed, and the anchorage areas on both sides of the tension joint are drilled at the same time. (2) Select the carbon dioxide breaker model based on the thickness of the anchoring zone and the hole depth; (3) Insert the selected carbon dioxide crusher into the hole and lead the firing line out of the hole; (4) Insert the self-locking sealing plug into the hole, tighten it with a wrench, and secure it; (5) Connect the firing lines of each crusher in series to the main firing line; (6) Install the sound-absorbing protective covers in the anchorage area to ensure full coverage of the anchorage area, and connect the four protective covers with iron chains. (7) After the crusher is set up, personnel should be moved to a distance of more than 20m. (8) When no vehicles pass through the area to be broken within 50m, the breaker is fired. The breaker takes effect within 0.4 seconds and breaks the concrete in the anchorage area. (9) Post-cleanup.

Images