Quick forcible entry method for airport pavement

Abstract

The invention relates to the technical field of airport pavement maintenance, in particular to a quick forcible entry method for an airport pavement. The method is characterized in that a semi-buried self-tunneling airport pavement forcible entry device is adopted to dig a pit slot deep to a base layer along the periphery of a damaged surface layer area, concrete blocks in the damaged surface layer area are separated from concrete of a peripheral surface layer and the base layer of a cushion bottom, a lifting appliance is installed on the damaged concrete blocks, and the damaged concrete blocks are lifted and moved away through an engineering crane. According to the method, the operation area is small, the forcible entry work amount is small, the time needed by forcible entry is short, and the requirement of airport pavement rush repair engineering meeting the navigation condition in a short time is met.

Description

Technical Field

[0001] The invention relates to the technical field of airport pavement maintenance, and in particular to a method for rapid dismantling of an airport pavement. Background Art

[0002] The pavement of airport flight zones in my country is usually made of cement concrete. Common pavement diseases in airport flight zones include sanding, peeling, cracking, sanding, peeling, cracking, apron, etc. Civil airports are required to meet the navigation conditions within 4 hours of suspension, which requires the demolition of the slabs in the diseased area of ​​the airport pavement and the completion of the concrete pouring and hardening construction as scheduled. Military airports require a more urgent time to resume navigation, so the problem of rapid pavement demolition needs to be solved urgently. A Chinese invention patent (patent number CN2024108143153, patent name "A device for milling old roads on municipal roads") discloses a device for milling old roads on municipal roads, characterized in that it includes an excavator body, a traction cover is fixedly installed at the bottom end of the swing arm of the excavator body, a connecting column is fixed at the bottom of the traction cover, a crossbeam is rotatably connected at the bottom of the connecting column, a support seat 1 is fixed at both ends of the crossbeam, a transmission pipe is rotatably connected between the two support seats 1, and a milling wheel is sleeved and fixed on the outer side of the transmission pipe. In the present invention, the swing arm of the excavator moves the milling wheel to the milling position, the depth of the road milling is controlled by the up and down movement of the swing arm, the length of the road milling distance is achieved by the excavator moving the milling wheel in a straight line along the road surface, the motor 1 rotates with the driving cover to make the crossbeam rotate and tilt with the milling wheel, reduce the width of the milling operation of the milling wheel, facilitate the milling wheel to avoid the manhole cover and mill the road surface, and help improve the efficiency of milling. A Chinese invention patent (patent number CN2017207034794, patent name is a road demolition machine) discloses a road demolition machine, characterized in that it includes a push rod, a hydraulic oil pump, a demolition pick, a lifting drill platform, a support plate and a solenoid valve, the push rod is fixed to the left end of the mobile platform, a connecting plate is fixed to the front end of the mobile platform, a demolition pick and a lifting drill platform are installed on the connecting plate, an engine is installed on the right side of the mobile platform, a hydraulic oil pump is arranged on the left side of the engine, the oil distributor is connected to the demolition pick through a demolition oil inlet pipe above the oil distributor, and is connected to the lifting drill platform through a lifting oil inlet pipe below the oil distributor, and solenoid valves are installed on the demolition oil inlet pipe and the lifting oil inlet pipe, the demolition pick body is composed of a hydraulic cylinder A, a hydraulic cylinder B, a support plate and a wedge nail, the wedge nail is arranged between the support plates, and the lifting drill platform is composed of a hydraulic cylinder C, a piston rod B, a motor and a drill bit. The beneficial effects are: the new type is a small mobile platform as a whole, which can meet the needs of most construction sites during construction and is easy to operate and move. The new type uses a drill bit to make preliminary holes on the damaged road, with low noise during construction operations. The drill holes are then hydraulically expanded using wedge nails to cause cracks in the road and separate it from the main body. It has high demolition efficiency, low noise, high stability, and flexible mobile operation. It can be flexibly constructed according to site requirements when in use, saving time and effort and greatly improving construction progress.

[0003] Prior art 1 "A milling device for old municipal roads" is intended to solve the problem of demolishing old municipal roads. Cement concrete is a hard and brittle non-metallic material, also known as cement stone. The milling and planing methods for removing cement stone have the following disadvantages: First, the general cutting process is composed of the main motion with the largest power consumption and the feed motion with the smallest power consumption. The main motions of milling and planing are rotary motion and reciprocating linear motion respectively. How to design a tool that meets two completely different motion trajectories is a difficult problem; second, whether milling or planing is used to remove hard and brittle non-metallic materials such as cement stone, it is a process of extrusion and removal. Extrusion and cutting from the surface of the cement stone to the inside is actually a process of vertical impact drilling. In other words, the milling wheel first First, the surface of the cement stone must be cracked vertically downward by drilling, and the vertical force exerted on the milling wheel needs to be transmitted to the excavator body through the swing arm. Because of the effect of the lever, when the force is amplified to the end of the excavator body, it requires several times the vertical force to balance, and it can only be balanced by increasing the deadweight of the excavator body. Then the movement and steering of the bulky excavator body will become a problem. If the instantaneous impact force is huge, the excavator body will tilt, causing torsion damage to the swing arm and hydraulic system failure; thirdly, milling can be divided into forward milling and reverse milling, which will produce left and right lateral impact forces on the swing arm, and the excavator swing arm is not designed to balance the lateral force. It can also be said that there is no clamp to clamp the cement stone workpiece, which will inevitably cause the tool to jump off and cannot continue construction. Prior art 2 "a road demolition machine" demolishes the road through a hydraulically controlled demolition pick. First, a drill is used to make preliminary holes on the damaged road, and then the wedge is injected and pressed to squeeze and destroy the drilled holes, so that the road surface forms scattered fragments, and then separated and cleaned. According to the "Technical Specifications for Construction of Earthwork and Pavement Base (Pad) Layers in Civil Airport Flight Areas" MH / T 5014-2022 and the "Civil Airport Cement Concrete Pavement Design Specifications" MH / T 5004-2010 stipulates that airport pavements are generally composed of a surface layer and a base layer, and both the surface layer and the base layer are usually designed as ordinary concrete structures. The joints divide the cement concrete pavement surface layer into pieces of pavement panels. The pavement where the disease occurs is generally a local surface layer area. The demolition of the local diseased surface layer area requires the protection of the surrounding intact surface layer area and base layer. The existing technology 2 is applied to the demolition of airport pavements, and its main disadvantages are: first, the extrusion force of the wedge nails on the surrounding concrete pavement is transmitted in an irregular direction. For the local maintenance of the airport pavement, the intact pavement that needs to continue to be used will be damaged; second, the extrusion force of the wedge nails on the surrounding concrete is limited, and the local damage radius is limited, that is, wedge nails with a small spacing and a large density are needed to demolish the surface layer area, and the construction space is very crowded. It is impossible to achieve the airport pavement emergency repair project that meets the flight conditions in a short time. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for rapid demolition of an airport pavement, which is characterized by: Step 1, cement concrete is a hard and brittle non-metallic material, also known as cement stone. The cement concrete structure in the diseased area of ​​the airport pavement is demolished, and the diseased cement stone can be removed by cutting. Regardless of the cutting method used, the cement stone as a workpiece needs to be designed with a special fixture to fix it in an accurate position. The fixture should be able to achieve the functions of positioning, clamping, and tool alignment. Therefore, a reaction frame is designed as a fixture to achieve the above functions. After the perimeter of the diseased area is laid out and marked, a grinding wheel cutter is used at the four corners of the perimeter to cut a working groove with a length and width of 200×100cm and a depth of the base layer on the surface layer of the road plate, and the working groove is cleaned. The cement stone is placed in the working groove, the reaction frame and the tool rod assembly are placed in the working groove, a pressure plate is installed on one side of the boring tool feed direction, and a flat cylinder is installed on the other side. The position of the pressure plate and the flat cylinder is adjusted to ensure that the center axis of the flat cylinder is parallel to the feeding working surface of the boring tool. The flat cylinder piston is extended, and the two positioning elements of the flat cylinder and the pressure plate are pressed toward the two sides of the working groove. The relative position of the reaction frame and the working groove is accurately fixed, that is, the clamping and positioning of the workpiece cement stone is completed, thereby guiding the tool rod assembly and the cement stone processing surface to be in the correct position. The positioning frame is connected to the guide beam and ensures the accurate movement trajectory of the boring tool through the guide beam.

[0005] Step 2: The airport pavement can be divided into taxiways, runways, and aprons. The joints divide the surface layer of the cement concrete pavement into pieces of pavement panels. The surface layer is designed to be 30 to 80 cm thick according to the size of the load it bears. Since there are waterproof and buffer isolation materials between the base layer and the surface layer, pits deep to the base layer are dug along the periphery of the diseased surface layer area to surround the concrete blocks in the diseased surface layer area, that is, the concrete blocks in the diseased surface layer area are separated from the concrete of the surrounding surface layers and the base layer at the bottom. A hoist is installed on the diseased concrete block, which is lifted and moved away by an engineering crane, and then concrete can be re-poured to repair the surface layer block.

[0006] The pit is excavated by boring. The guide beam is set on the marking line. Photoelectric sensors are installed on the front and rear support legs. The height of the support legs is adjusted according to the signal feedback of the photoelectric sensors. The single piston rod hydraulic cylinder pushes the tool bar assembly to reciprocate along the guide rail. The tool bar assembly slides on the guide rail to ensure the straightness of the reciprocating linear motion. The guide rail is selected to be a rectangular linear sliding guide rail with a large bearing capacity. The slide rail is connected to the horizontal rotating shaft cylinder after being buffered by the accumulator. The end face of the horizontal rotating shaft cylinder is installed 8 to 1 6 pairs of boring cutters. Since the boring cutters work in a fully enclosed manner during the boring process, the chips cannot be discharged and will cause the tool to be stuck. Therefore, the boring cutters on the horizontal rotating shaft cylinder are half buried in the pit of the road panel. The chips flowing out from the front of the boring cutters can be cleaned by a vacuum cleaner, and cooling water can be sprayed to cool the boring cutters and absorb dust. The cut semi-cylindrical cement stone residues are discharged backwards through the hollow pipe of the horizontal rotating shaft cylinder. Two sets of bearing seats are installed to ensure the roundness of the boring cutter's motion trajectory. The planetary reducer drives the ring gear installed on the horizontal rotating shaft cylinder to complete the rotational motion.

[0007] Step three, fill the header and the bottom of the boiler drum with saturated liquid ammonia, and fill the upper part of the boiler drum with saturated ammonia vapor. A free piston is designed in the cylinder body of the actuator. The free piston separates the cylinder body into two left and right cavities, which are connected to the boiler drum and the header through connecting pipes respectively. The left cavity is filled with saturated ammonia vapor, and the right cavity is filled with saturated liquid ammonia. The power consumed by the boring tool is very different when cutting cement stone of different properties and when cutting in and out. The principle of phase change conversion of saturated liquid ammonia and saturated ammonia vapor under different pressures in the pressure vessel is used to continuously convert pressure energy and phase change storage energy. When the pressure energy increases, the free piston is compressed to the left cavity, and the volume work is converted into phase change storage energy. The saturated ammonia vapor is transformed into saturated liquid ammonia, and the vapor-liquid mixture enters from the left cavity. When the pressure energy decreases, the free piston moves to the right cavity, the phase change energy releases volume work, the saturated liquid ammonia evaporates into saturated ammonia vapor, the vapor-liquid mixture enters the header from the right cavity, is injected into the boiler drum through the connecting pipe, and is sent to the left cavity after separation by the vapor-liquid separator to balance the volume change in the cavity. Since the phase change energy storage of saturated liquid ammonia balances the power consumption of the boring tool, the curve of the impact work suffered by the boring tool will become much smoother. At the same time, when the frequency of the impact and vibration of the boring tool is the same as the natural frequency of the guide beam, resonance will occur, which will seriously damage the blade. The phase change energy storage in the accumulator can absorb this resonance peak well, and the life of the boring tool will be extended.

[0008] Step 4. The working surface that the boring tool needs to process is a semicircular arc, which consumes less power and has a faster feed speed. After the boring tool completes the processing of the cement stone working section, it enters the working groove at the other end, shuts down the planetary reducer, retracts the flat cylinder piston, relieves the pressure on the reaction frame, lifts and evacuates the guide beam through the engineering crane, and then installs the hoisting device to lift and move the semi-cylindrical cement stone block in the pit. After the pits around are excavated, install the hoisting device on the defective concrete block. If the edge defective concrete block has been separated from the main body, first lift and move it through the engineering crane, and then lift the defective concrete block as a whole. During the lifting process, the posture of the concrete block is adjusted by paving sleepers to ensure the smooth operation of the crane.

[0009] Compared with the prior art, the present invention has at least the following advantages: first, a semi-buried self-excavating airport pavement demolition device is used to dig a pit deep to the base layer along the periphery of the diseased surface layer area, so that the concrete blocks in the diseased surface layer area are separated from the concrete of the surrounding surface layer and the base layer at the bottom. A hoist is installed on the diseased concrete block, which is lifted and moved away by an engineering crane, and then concrete can be re-poured to repair the surface layer block. The operating area is small, the demolition work volume is small, and the time required for demolition is short, which meets the requirements of the airport pavement emergency repair project that meets the navigation conditions in a short time; second, the cement stone as the workpiece needs to be designed with a special fixture to fix it in the exact position, and the two positioning elements of the flat cylinder and the pressure plate press against the two sides of the working groove, and the reaction frame and the working groove are pressed together. The relative position of the workpiece cement stone is accurately fixed, that is, the clamping and positioning of the workpiece cement stone is completed, so as to guide the tool rod assembly and the cement stone processing surface to the correct position; thirdly, the boring cement stone excavation process is selected to complete the excavation of the pit. The working surface required to be processed by the boring tool is a semicircular arc, which consumes less power, emits less dust, and emits less noise, which is energy-saving and environmentally friendly; fourthly, since the phase change energy storage of saturated liquid ammonia balances the power consumption borne by the boring tool, the curve of the impact work suffered by the boring tool will become much smoother. At the same time, when the frequency of the impact and vibration of the boring tool is the same as the natural frequency of the guide beam, resonance will occur, which will seriously damage the blade. The phase change energy storage in the accumulator can absorb this resonance peak very well, and the life of the boring tool will be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a schematic diagram of the main structure of a method for rapid demolition of an airport pavement.

[0011] Figure 2 The figure is a schematic diagram of the structure of sample A of a method for rapid demolition of an airport pavement according to the present invention.

[0012] Figure 3 This is a schematic diagram of the B-scale structure of a method for rapid airport pavement demolition of the present invention.

[0013] Figure 4 It is a schematic diagram of the C-scale structure of a method for rapid demolition of an airport pavement of the present invention.

[0014] Figure 5 It is a schematic diagram of the D-scale structure of a method for rapid demolition of an airport pavement of the present invention.

[0015] Figure 6 This is a schematic diagram of the E-scale structure of a method for rapid airport pavement demolition according to the present invention.

[0016] 1-Guide beam 2-Support leg 3-Guide rail 4-Reaction frame 5-Single piston rod hydraulic cylinder 6-tool bar assembly 7-accumulator 8-slide rail 9-planetary reducer 10-horizontal rotating shaft 11-bearing seat 12-ring gear 13-boring cutter 14-evaporator 15-actuator 16-gas-liquid separator 17-boiler drum 18-connecting pipe 19 - header 20 - cylinder body 21 - free piston 22 - flat cylinder 23 - positioning frame 24 - working groove 25 - pressure plate. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a method for rapid demolition of an airport pavement is characterized by: step one, cement concrete is a hard and brittle non-metallic material, also known as cement stone. The cement concrete structure in the diseased area of ​​the airport pavement is demolished, and the diseased cement stone can be removed by cutting. No matter what cutting method is used, the cement stone as a workpiece needs to be fixed in an accurate position by a special fixture. The fixture should be able to realize the functions of positioning, clamping, and tool alignment. Therefore, a reaction frame 4 is designed as a fixture to realize the above functions. After the perimeter of the diseased area is laid out and marked, a grinding wheel cutter is used at the four corners of the perimeter to cut a working groove 24 with a length and width of 200×100 cm and a depth to the base layer on the surface layer of the road plate. The cement stone blocks in the working groove 24 are cleaned and the reaction frame 4 is assembled with the tool bar. 13, and the tool 6 is placed in the working groove 24. A pressure plate 25 is installed on one side of the feeding direction of the boring tool 13, and a flat cylinder 22 is installed on the other side. The positions of the pressure plate 25 and the flat cylinder 22 are adjusted to ensure that the central axis of the flat cylinder 22 is parallel to the feeding working surface of the boring tool 13. The piston of the flat cylinder 22 is extended, and the two positioning elements of the flat cylinder 22 and the pressure plate 25 are pressed against the two sides of the working groove 24. The relative position of the reaction frame 4 and the working groove 24 is accurately fixed, that is, the clamping and positioning of the workpiece cement stone is completed, thereby guiding the tool rod assembly 6 and the cement stone processing surface to be in the correct position. The positioning frame 23 is connected to the guide beam 1 and ensures the accurate movement trajectory of the boring tool 13 through the guide beam 1.

[0019] Step 2: The airport pavement can be divided into taxiways, runways, and aprons. The joints divide the surface layer of the cement concrete pavement into pieces of pavement panels. The surface layer is designed to be 30 to 80 cm thick according to the size of the load it bears. Since there are waterproof and buffer isolation materials between the base layer and the surface layer, pits deep to the base layer are dug along the periphery of the diseased surface layer area to surround the concrete blocks in the diseased surface layer area, that is, the concrete blocks in the diseased surface layer area are separated from the concrete of the surrounding surface layers and the base layer at the bottom. A hoist is installed on the diseased concrete block, which is lifted and moved away by an engineering crane, and then concrete can be re-poured to repair the surface layer block.

[0020] The pit is excavated by boring. The guide beam 1 is set on the layout line. The front and rear support legs 2 are equipped with photoelectric sensors. The height of the support legs 2 is adjusted according to the signal feedback of the photoelectric sensors. The single piston rod hydraulic cylinder 5 pushes the tool rod assembly 6 to reciprocate along the guide rail 3. The tool rod assembly 6 slides on the guide rail 1 by the slide rail 8 to ensure the straightness of the reciprocating linear motion. The guide rail 1 is a rectangular linear sliding guide with a large bearing capacity. The slide rail 8 is connected to the horizontal rotating shaft cylinder 10 after being buffered by the accumulator 7. 8 to 16 pairs of boring The boring cutter 13 is fully enclosed in the boring mode, and the chips cannot be discharged, which will cause the tool to be stuck. Therefore, the boring cutter 13 on the horizontal rotating shaft cylinder 10 is half buried in the pit of the road panel. The chips flowing out from the front of the boring cutter 13 can be cleaned by a vacuum cleaner, and cooling water can be sprayed to cool the boring cutter 13 and absorb dust. The semi-cylindrical cement stone residue that has been cut off is discharged backward through the hollow pipe of the horizontal rotating shaft cylinder 10. Two sets of bearing seats 11 are installed to ensure the roundness of the movement trajectory of the boring cutter 13. The planetary reducer 9 drives the ring gear 12 installed on the horizontal rotating shaft cylinder 10 to complete the rotational motion.

[0021] Step three, the header 19 and the bottom of the drum 17 are filled with saturated liquid ammonia, and the upper part of the drum 17 is filled with saturated ammonia vapor. A free piston 21 is designed in the cylinder 20 of the actuator 15. The free piston 21 separates the cylinder 20 into two left and right cavities, which are respectively connected to the drum 17 and the header 19 through a connecting pipe. The left cavity is filled with saturated ammonia vapor, and the right cavity is filled with saturated liquid ammonia. The power consumed by the boring tool 13 when cutting cement stones of different hardness and softness and when cutting in and out is very different. The principle of phase change conversion of saturated liquid ammonia and saturated ammonia vapor under different pressures in the pressure vessel is used to continuously convert pressure energy and phase change storage energy. When the pressure energy increases, the free piston 21 is compressed toward the left cavity, and the volume work is converted into phase change storage energy. The saturated ammonia vapor is phase-changed into saturated liquid ammonia, and the vapor-liquid mixture enters from the left cavity. The saturated liquid ammonia enters the boiler drum 17, and is injected into the right chamber through the connecting row pipe 18 to balance the volume change in the chamber; when the pressure energy decreases, the free piston 21 moves to the right chamber, the phase change energy releases volume work, the saturated liquid ammonia evaporates into saturated ammonia vapor, and the vapor-liquid mixture enters the header 19 from the right chamber, is injected into the boiler drum 17 through the connecting row pipe 18, and is sent to the left chamber after separation by the vapor-liquid separator 16 to balance the volume change in the chamber. Since the phase change energy storage of the saturated liquid ammonia balances the power consumption borne by the boring tool 13, the curve of the impact work suffered by the boring tool 13 will become much smoother. At the same time, when the frequency of the impact and vibration of the boring tool 13 is the same as the natural frequency of the guide beam 1, resonance will occur, which will seriously damage the blade. The phase change energy storage in the accumulator 7 can absorb this resonance peak well, and the life of the boring tool 13 will be extended.

[0022] Step 4: the working surface that the boring tool 13 needs to process is a semicircular arc, which consumes less power and has a faster feeding speed. After the boring tool 13 completes the processing of the cement stone working section, it enters the working groove 24 at the other end, shuts down the planetary reducer 9, retracts the piston of the flat oil cylinder 22, relieves the pressure on the reaction frame 4, lifts and evacuates the guide beam 1 through the engineering crane, and then installs the hoisting device to lift and move the semi-cylindrical cement stone block in the pit. After the pit excavation around is completed, install the hoisting device on the diseased concrete block. If the edge diseased concrete block has been separated from the main body, first lift and move it through the engineering crane, and then lift the diseased concrete block as a whole. During the lifting process, the posture of the concrete block is adjusted by paving sleepers to ensure the smooth operation of the crane.

Claims

1. A method for rapid demolition of an airport pavement, characterized by: Step 1: Cement concrete is a hard and brittle non-metallic material, also known as cement stone. The cement concrete structure in the damaged area of ​​the airport pavement can be dismantled and the damaged cement stone can be removed by cutting. Regardless of the cutting method, the cement stone as a workpiece needs to be fixed in the correct position by a special fixture. The fixture should be able to realize the functions of positioning, clamping and tool setting. Therefore, a reaction frame is designed as a fixture to achieve the above functions. After marking the perimeter of the damaged area, a grinding wheel cutter is used to cut a working groove of 200×100cm in length and width and deep to the base layer on the surface layer of the road plate at the four corners of the perimeter, and the cement stone in the working groove is cleaned; Step 1: Step 2: Dig the pit by boring. The guide beam is set on the layout line. Photoelectric sensors are installed on the front and rear support legs. The height of the support legs is adjusted according to the signal feedback from the photoelectric sensors. Two sets of bearing seats are installed to ensure the roundness of the boring tool's motion trajectory. The planetary reducer drives the ring gear installed on the horizontal rotating shaft to complete the rotary motion. Step 3: The bottom of the header and the boiler drum are filled with saturated liquid ammonia, and the top of the boiler drum is filled with saturated ammonia steam. A free piston is designed in the cylinder body of the actuator. The free piston separates the cylinder body into two left and right cavities, which are connected to the boiler drum and the header through a pipe. The left cavity is filled with saturated ammonia steam, and the right cavity is filled with saturated ammonia steam. and liquid ammonia. When the pressure energy increases, the free piston compresses toward the left cavity, the volume work is converted into phase change storage energy, the saturated ammonia vapor is phase-changed into saturated liquid ammonia, the vapor-liquid mixture enters the boiler drum from the left cavity, and the saturated liquid ammonia is injected into the right cavity through the connecting row pipe to balance the volume change in the cavity; when the pressure energy decreases, the free piston moves toward the right cavity, the phase change energy releases volume work, the saturated liquid ammonia evaporates into saturated ammonia vapor, the vapor-liquid mixture enters the header from the right cavity, is injected into the boiler drum through the connecting row pipe, and is sent to the left cavity after separation by the vapor-liquid separator to balance the volume change in the cavity; Step 4: the working surface required to be processed by the boring tool is a semicircular arc, and the power consumption is relatively small , the feeding speed is relatively fast. After the boring cutter completes the processing of the cement stone working section, it enters the working groove at the other end, shuts down the planetary reducer, retracts the flat cylinder piston, relieves the pressure on the reaction frame, lifts and evacuates the guide beam through the engineering crane, and then installs the hoisting device to lift and move the semi-cylindrical cement stone block in the pit away. After the pits around are excavated, install the hoisting device on the defective concrete block. If the edge defective concrete block has been separated from the main body, first lift and move it through the engineering crane, and then lift the defective concrete block as a whole. During the lifting process, the posture of the concrete block is adjusted by paving sleepers to ensure the smooth operation of the crane.

2. The method for rapid airport pavement demolition according to claim 1 is characterized by: Place the reaction frame and tool rod assembly into the working groove, install the pressure plate on one side of the boring tool feed direction and the flat cylinder on the other side, adjust the position of the pressure plate and the flat cylinder to ensure that the center axis of the flat cylinder is parallel to the feeding working surface of the boring tool, extend the flat cylinder piston, and press the two positioning elements of the flat cylinder and the pressure plate toward the two sides of the working groove. The relative position of the reaction frame and the working groove is accurately fixed, that is, the clamping and positioning of the workpiece cement stone is completed, thereby guiding the tool rod assembly and the cement stone processing surface to be in the correct position. The positioning frame connects the guide beam and ensures the accurate movement trajectory of the boring tool through the guide beam.

3. The method for rapid airport pavement demolition according to claim 1 is characterized by: The single piston rod hydraulic cylinder pushes the tool rod assembly to reciprocate along the guide rail. The tool rod assembly slides on the guide rail to ensure the straightness of the reciprocating linear motion. The guide rail is a rectangular linear sliding guide type with a large load-bearing capacity.

4. The method for rapid airport pavement demolition according to claim 1 is characterized by: The slide rail is buffered by the accumulator and then connected to the horizontal rotating shaft cylinder. 8 to 16 pairs of boring cutters are installed along the circumferential direction on the end face of the horizontal rotating shaft cylinder. Since the boring cutters work in a fully enclosed manner during boring, the chips cannot be discharged and will block the tool. Therefore, the boring cutters on the horizontal rotating shaft cylinder are half buried in the pit of the road panel. The chips flowing out from the front of the boring cutters can be cleaned by a vacuum cleaner, and cooling water can be sprayed to cool the boring cutters and absorb dust. The cut semi-cylindrical cement stone residues are discharged backwards through the hollow pipe of the horizontal rotating shaft cylinder.

5. The method for rapid airport pavement demolition according to claim 1 is characterized by: The power consumed by the boring tool varies greatly when cutting cement stone of different hardness and softness and when cutting in and out. The pressure energy and phase change storage energy are continuously converted by utilizing the principle of phase change conversion of saturated liquid ammonia and saturated ammonia vapor under different pressures in a pressure vessel.

6. A method for rapid airport pavement demolition according to claim 1, characterized in that: The boring tool works in a fully enclosed manner, and the chips cannot be discharged, which will cause the tool to be stuck. Therefore, the boring tool on the horizontal rotating shaft is half buried in the groove of the road panel, and the chips flowing out from the front of the boring tool can be cleaned by a vacuum cleaner.

7. The method for rapid airport pavement demolition according to claim 1 is characterized by: Since the phase change energy storage of saturated liquid ammonia balances the power consumption of the boring tool, the curve of the impact energy received by the boring tool will become much smoother. At the same time, when the frequency of the impact and vibration of the boring tool is the same as the natural frequency of the guide beam, resonance will occur, which will seriously damage the blade. The phase change energy storage in the accumulator can absorb this resonance peak very well, and the life of the boring tool will be extended.

Images