Method for controlling flatness of large-area field concrete

Abstract

The invention discloses a flatness control method for large-area field concrete, and relates to the technical field of civil engineering. The laser level meter automatically searches for balance and opens horizontal rays; a handheld receiver is arranged according to the designed elevation, and supporting points of two reference elevations are set; a leveling mechanism of the laser leveling machine is placed on the two supporting points, an automatic switch is started to enable the vehicle body to be automatically leveled, the heights of leveling machine receivers at the two ends of the leveling mechanism are adjusted, and whether the elevations at the two ends of the leveling mechanism are accurate or not is tested through a handheld receiver; the concrete is unloaded to a to-be-leveled area by the mixer truck; the laser leveling machine is started, a braking mode is started, and the laser leveling machine vibrates and grinds while walking through the leveling mechanism; the method has the beneficial effects that through an intelligent and automatic mode, the flatness control precision and the operation efficiency of large-area field concrete construction are remarkably improved, manpower dependence is reduced, and the method is an important innovation of the modern building construction technology.

Description

Technical Field Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a method for controlling the flatness of large-area field concrete. Background Art

[0002] In large-scale field concrete construction, ensuring the flatness of the concrete surface is one of the key links, which directly affects the later use function and aesthetics. The traditional method relies on manual measurement and adjustment, which has the problems of low efficiency and unstable accuracy. Therefore, it is particularly important to develop a flatness control method that integrates modern scientific and technological means. The existing construction generally uses laser concrete paving and leveling.

[0003] Why do more and more owners choose laser concrete paving and leveling? First: it can be used for large-scale construction, reducing the height difference caused by expansion and contraction caused by the formwork and sinking; second: it can effectively improve the height error of the flatness of a large area; third: the construction quality is high, because it can be constructed on a large area, and large machines can play a role; fourth: the vibration island is dense, the machine has its own vibration, and the core honeycomb is reduced.

[0004] However, in the existing laser paving machines, when the leveling mechanism works along with the moving process of the traveling mechanism, the traveling mechanism is prone to shaking when walking on the road surface where concrete has been unloaded, so that the traveling mechanism is driven to shake, affecting the paving flatness; the traveling mechanism moves intermittently, and the leveling mechanism is extended and retracted to level the concrete. Although the shaking problem of the traveling mechanism is avoided, it cannot be constructed continuously, and the height of the leveling mechanism needs to be adjusted after each movement; the operation is cumbersome and cannot meet people's needs. Summary of the invention

[0005] The purpose of the present invention is to provide a method for controlling the flatness of large-area field concrete in order to solve the above-mentioned problems. It realizes efficient and high-precision flatness control in the construction of large-area field concrete, combines intelligent technology with traditional construction technology, so as to improve construction quality and efficiency.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions: A method for controlling the flatness of large-area field concrete comprises the following steps: Step S1: Installing a laser level at the construction site; Step S2: Turn on the laser level switch, the laser level automatically finds balance and turns on the horizontal ray; Step S3: Set up the handheld receiver according to the design elevation and determine the support points of two reference elevations; Step S4: Place the leveling mechanism of the laser screed on two support points at the same elevation as the concrete laying, start the automatic switch to automatically level the vehicle body, adjust the height of the screed receivers at both ends of the leveling mechanism, align the lower end of the handheld receiver with the lower surface of the leveling mechanism, and test whether the elevations at both ends of the leveling mechanism are accurate; Step S5: The mixer truck unloads the concrete in the area to be leveled; Step S6: Start the laser screed, turn on the braking mode, and the laser screed vibrates and levels while walking through the leveling mechanism; Step S7: During the operation of the laser screed, automatically level the excess concrete and automatically screw it out through the auger.

[0007] Preferably: In step S7, when the laser screed is beyond the stable range of receiving signals from the laser level, the handheld receiver can be placed at the elevation position or on the laid concrete where signals can be normally received, and then the laser screed can be moved. After moving, start the automatic leveling and turn on the horizontal ray, and adjust the height of the level support to ensure that the handheld receiver can receive signals, thus completing the movement of the laser level for continuous construction.

[0008] Preferably: The laser level includes a support, a level body, the level body includes a laser emission module and an automatic leveling module, and the automatic leveling module includes a gyroscope.

[0009] Preferably: The support includes a mounting base, telescopic legs, and a leg adjustment mechanism. The upper part of the mounting base is set as a mounting platform. The lower edge of the mounting base is evenly and rotatably connected with three telescopic legs. The lower end of the telescopic leg is rotatably connected with a foot. The rotation planes of each telescopic leg and the foot and the rotation plane of the mounting base coincide; The telescopic leg includes an upper telescopic sleeve and a lower telescopic rod. The three telescopic sleeves are connected by three connecting rods. The three connecting rods are connected by a connecting block. The connecting rod and the connecting block are rotatably connected. One end of each connecting rod away from the connecting block is rotatably connected to the three telescopic sleeves respectively. The rotation planes of each connecting rod and the telescopic sleeve and the connecting block coincide.

[0010] Preferably: The telescopic rod is provided with scale lines. At the position corresponding to the upper end of the telescopic sleeve on the mounting base, an angle meter for measuring the rotation angle of the telescopic sleeve and a clamping screw for fixing the rotation of the telescopic sleeve are fixedly installed.

[0011] Preferably: The laser screed includes a screed body and a control module. The screed body includes a traveling mechanism and a leveling mechanism; The control module includes the sensor group and a processing module.

[0012] Preferably, a cantilever telescopic mechanism is provided on the traveling mechanism, and the leveling mechanism is installed on the moving end of the cantilever telescopic mechanism. Two lifting mechanisms for driving the leveling mechanism to lift are provided on the moving end of the cantilever telescopic mechanism, and the two lifting mechanisms are respectively arranged at both ends of the leveling mechanism; telescopic mounting rods are fixedly installed above both ends of the leveling mechanism, and a leveling machine receiver for receiving laser is installed on the telescopic mounting rods.

[0013] Preferably, the leveling mechanism is installed on the traveling mechanism through a balancing mechanism, and the balancing mechanism adopts the principle of a three-axis gimbal anti-shake stabilizer.

[0014] Preferably, the leveling machine receiver includes a plurality of laser receiving units in the vertical direction. The middle laser receiving unit is named unit 0. When the leveling machine receiver is installed, unit 0 is flush with the horizontal laser plane emitted by the laser level; in step S6, when the laser leveling machine is leveling, when the laser receiving units below unit 0 receive the horizontal laser emitted by the laser level, the lifting mechanism on the laser leveling machine acts to lower the height of the leveling mechanism until the lifting mechanism stops acting when unit 0 receives the horizontal laser emitted by the laser level; when the laser receiving units above unit 0 receive the horizontal laser emitted by the laser level, the lifting mechanism on the laser leveling machine acts to raise the height of the leveling mechanism until the lifting mechanism stops acting when unit 0 receives the horizontal laser emitted by the laser level.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention significantly improves the flatness control accuracy and operation efficiency of large-area field concrete construction in an intelligent and automated manner, reduces the dependence on manpower, and is an important innovation in modern building construction technology; by setting scale lines and angle gauges on the support, when the support needs to be folded during the movement of the support, the support state can be restored after the movement of the support by recording data, which is more convenient to use. Detailed implementation mode

[0016] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment 1

[0018] A method for controlling the flatness of large-area field concrete includes the following steps: Step S1: Install a laser level at the construction site; Step S2: Turn on the laser level switch. The laser level automatically seeks balance and turns on the horizontal ray. Step S3: Set up the handheld receiver according to the design elevation and determine the support points for two reference elevations. Step S4: Place the leveling mechanism of the laser screed on two support points at the same elevation as the concrete paving. Start the automatic switch to let the vehicle body automatically level itself. Adjust the height of the laser receivers at both ends of the leveling mechanism. Align the lower end of the handheld receiver with the lower surface of the leveling mechanism and test whether the elevations at both ends of the leveling mechanism are accurate. Step S7: The mixer truck unloads the concrete in the area to be leveled. Step S6: Start the laser screed and turn on the braking mode. The laser screed vibrates and grinds while moving forward through the leveling mechanism. The laser receiver of the screed includes several laser receiving units in the vertical direction. Name the middle laser receiving unit as Unit 0. When the laser receiver of the screed is installed, Unit 0 is flush with the horizontal laser plane emitted by the laser level. During the leveling process, when the laser receiving units below Unit 0 of the laser screed receive the horizontal laser emitted by the laser level, the lifting mechanism on the laser screed operates to lower the height of the leveling mechanism until Unit 0 receives the horizontal laser emitted by the laser level and the lifting mechanism stops operating. When the laser receiving units above Unit 0 receive the horizontal laser emitted by the laser level, the lifting mechanism on the laser screed operates to raise the height of the leveling mechanism until Unit 0 receives the horizontal laser emitted by the laser level and the lifting mechanism stops operating. Step S7: During the operation of the laser screed, it automatically levels the excess concrete and automatically extrudes it through the auger. When the laser screed is beyond the stable range of receiving signals from the laser level, the handheld receiver can be placed at the elevation position or on the paved concrete where it can receive signals normally. Then the laser screed can be moved. After moving, start the automatic leveling and turn on the horizontal ray. Adjust the height of the level support to ensure that the handheld receiver can receive signals, and complete the movement of the laser level for continuous construction. Embodiment 2

[0019] A flatness control system for large - area field concrete paving includes a laser level, a handheld receiver, and a laser screed. The laser level includes a support and a level main body. The level main body includes a laser emission module and an automatic leveling module. The automatic leveling module includes a gyroscope.

[0020] The support includes a mounting base, telescopic legs, and a leg adjustment mechanism. The upper part of the mounting base is set as a mounting platform. Three telescopic legs are evenly and rotatably connected to the lower edge of the mounting base. The lower end of each telescopic leg is rotatably connected to a foot, and the rotation planes of each telescopic leg and the foot coincide with the rotation plane of the mounting base. The telescopic leg includes an upper telescopic sleeve and a lower telescopic rod. The three telescopic sleeves are connected by three connecting rods, and the three connecting rods are connected by a connecting block. The connecting rod and the connecting block are rotatably connected. One end of each connecting rod away from the connecting block is rotatably connected to one of the three telescopic sleeves, and the rotation planes of each connecting rod and the telescopic sleeve coincide with the rotation plane between the connecting rod and the connecting block.

[0021] Scale lines are provided on the telescopic rod. At the position corresponding to the upper end of the telescopic sleeve on the mounting base, an angle meter for measuring the rotation angle of the telescopic sleeve and a clamping screw for fixing the rotation of the telescopic sleeve are fixedly installed.

[0022] The laser screed includes a screed main body and a control module. The screed main body includes a traveling mechanism and a leveling mechanism. The leveling mechanism includes a swing frame. A vibrating plate is provided at the lower part of the swing frame. A vibrating motor is provided on the vibrating plate. A scraper that can be adjusted in height is provided on one side of the vibrating plate. During operation, first adjust the height of the swing frame and the scraper according to the height of the ground to be leveled as required, and then start the vehicle body to move on the freshly poured concrete ground. As the vehicle body moves, the scraper can scrape the bulges on the concrete ground flat, and the vibrating plate on the swing frame can compact the concrete ground under the action of the vibrating motor. The control module includes a sensor group and a processing module.

[0023] A cantilever telescopic mechanism is provided on the traveling mechanism. The leveling mechanism is installed on the moving end of the cantilever telescopic mechanism. Two lifting mechanisms for driving the leveling mechanism to lift are provided on the moving end of the cantilever telescopic mechanism, and the two lifting mechanisms are respectively arranged at both ends of the leveling mechanism. Telescopic mounting rods are fixedly installed above both ends of the leveling mechanism. A screed receiver for receiving laser is installed on the telescopic mounting rod. The screed receiver is a laser surface receiver. The laser emission module includes a laser emitter that emits horizontal laser. A laser reception reference point is provided on the laser surface receiver. When the laser emitted by the laser emitter is below the laser reception reference point on the laser receiver, it indicates that the positions of the swing frame and the scraper are too high, that is, lower the heights of the swing frame and the scraper. When the laser emitted by the laser emitter is above the laser reception reference point on the laser receiver, it indicates that the positions of the swing frame and the scraper are too low, that is, raise the heights of the swing frame and the scraper. Embodiment 3

[0024] The difference between this embodiment and Embodiment 2 is that the leveling mechanism is installed on the traveling mechanism through a balancing mechanism, and the balancing mechanism adopts the principle of a three-axis gimbal anti-shake stabilizer.

[0025] The present invention significantly improves the flatness control accuracy and operation efficiency of large-area field concrete construction in an intelligent and automated manner, reduces the dependence on manpower, and is an important innovation in modern building construction technology.

[0026] The leveling mechanism includes a swing frame. A vibrating plate is provided at the lower part of the swing frame. A vibrating motor is provided on the vibrating plate. A scraper that can be adjusted in height is provided on one side of the vibrating plate. During operation, the heights of the swing frame and the scraper are adjusted in advance according to the height of the ground to be leveled. Then, the vehicle body is started to move on the ground where the concrete has just been poured. As the vehicle body moves, the scraper can scrape the bulges on the concrete ground flat, and the vibrating plate on the swing frame can compact the concrete ground under the action of the vibrating motor.

[0027] A vertical rod is provided on the scraper, and a laser receiver is provided on the vertical rod. The laser receiver is a laser surface receiver. A laser transmitter is provided on the reference ground away from the leveling machine. The laser transmitter emits horizontal laser. A laser reception reference point is provided on the laser surface receiver. When the laser emitted by the laser transmitter is below the laser reception reference point on the laser receiver, it indicates that the positions of the swing frame and the scraper are too high, that is, the heights of the swing frame and the scraper are lowered; when the laser emitted by the laser transmitter is above the laser reception reference point on the laser receiver, it indicates that the positions of the swing frame and the scraper are too low, that is, the heights of the swing frame and the scraper are raised.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A method for controlling the flatness of large-area field concrete, characterized in that: The following steps are involved: Step S1: Installing a laser level at the construction site; Step S2: Turn on the laser level switch, the laser level automatically finds balance and turns on the horizontal ray; Step S3: Set up the handheld receiver according to the design elevation and determine the support points of two reference elevations; Step S4: Place the leveling mechanism of the laser leveling machine on two supporting points with the same elevation as the concrete paving, start the automatic switch to allow the vehicle body to automatically level, adjust the height of the leveling machine receivers at both ends of the leveling mechanism, align the lower end of the handheld receiver with the lower surface of the leveling mechanism, and test whether the elevations at both ends of the leveling mechanism are accurate; Step S5: The mixer truck unloads the concrete on the area to be leveled; Step S6: Start the laser leveling machine, turn on the braking mode, and the laser leveling machine vibrates and grinds the surface through the leveling mechanism while moving; Step S7: When the laser leveling machine is working, it automatically levels the excess concrete and automatically wrings it out through the auger.

2. The method for controlling the flatness of large-area floor concrete according to claim 1 is characterized in that: In step S7, when the distance between the laser leveler and the laser leveler exceeds the stable range for receiving signals, the handheld receiver can be placed at an elevation position or a position where concrete is laid and can receive signals normally. Then the laser leveler can be moved. After moving, start automatic leveling and turn on the horizontal ray, adjust the height of the level bracket to ensure that the handheld receiver can receive signals, and complete the movement of the laser leveler for continuous construction.

3. The method for controlling the flatness of large-area floor concrete according to claim 1 is characterized in that: The laser level comprises a bracket and a level body. The level body comprises a laser emission module and an automatic leveling module. The automatic leveling module comprises a gyroscope.

4. The method for controlling the flatness of large-area floor concrete according to claim 3 is characterized in that: The bracket includes a mounting seat, telescopic legs and a leg adjustment mechanism, the upper portion of the mounting seat is arranged as a mounting platform, the lower edge of the mounting seat is evenly rotatably connected with three telescopic legs, the lower ends of the telescopic legs are rotatably connected with feet, and each of the telescopic legs coincides with a rotating surface of the feet and a rotating surface of the mounting seat; the telescopic legs include an upper telescopic sleeve and a lower telescopic rod, the three telescopic sleeves are connected by three connecting rods, the three connecting rods are connected by connecting blocks, the connecting rods are rotatably connected to the connecting blocks, and one end of the three connecting rods away from the connecting blocks is rotatably connected to the three telescopic sleeves respectively, and each of the connecting rods coincides with a rotating surface of the telescopic sleeve and a rotating surface between the connecting block.

5. A method for controlling the flatness of large-area floor concrete according to claim 4, characterized in that: The telescopic rod is provided with scale lines, and an angle meter for measuring the rotation angle of the telescopic sleeve and a clamping screw for fixing the rotation of the telescopic sleeve are fixedly installed on the mounting seat corresponding to the upper end position of the telescopic sleeve.

6. The method for controlling the flatness of large-area floor concrete according to claim 1, characterized in that: The laser leveling machine includes a leveling machine body and a control module. The leveling machine body includes a walking mechanism and a leveling mechanism; the control module includes the sensor group and a processing module.

7. A method for controlling the flatness of large-area floor concrete according to claim 6, characterized in that: The walking mechanism is provided with a cantilever beam telescopic mechanism, the leveling mechanism is installed on the moving end of the cantilever beam telescopic mechanism, and the moving end of the cantilever beam telescopic mechanism is provided with two lifting mechanisms for driving the leveling mechanism to rise and fall, and the two lifting mechanisms are respectively arranged at both ends of the leveling mechanism; telescopic mounting rods are respectively fixedly installed above the two ends of the leveling mechanism, and a leveling machine receiver for receiving laser is installed on the telescopic mounting rods.

8. The method for controlling the flatness of large-area floor concrete according to claim 6 is characterized in that: The leveling mechanism is installed on the walking mechanism via a balancing mechanism, and the balancing mechanism adopts the principle of a three-axis gimbal anti-shake stabilizer.

9. The method for controlling the flatness of large-area floor concrete according to claim 7, characterized in that: The receiver of the leveling machine includes several laser receiving units in the vertical direction, and the middle laser receiving unit is named unit 0. When the leveling machine receiver is installed, unit 0 is flush with the horizontal laser surface emitted by the laser level; in step S6, when the laser leveling machine is leveling, when the laser receiving unit below unit 0 receives the horizontal laser emitted by the laser level, the lifting mechanism on the laser leveling machine is activated to lower the leveling mechanism, and the lifting mechanism stops when unit 0 receives the horizontal laser emitted by the laser level; when the laser receiving unit above unit 0 receives the horizontal laser emitted by the laser level, the lifting mechanism on the laser leveling machine is activated to raise the leveling mechanism, and the lifting mechanism stops when unit 0 receives the horizontal laser emitted by the laser level.