Automatic compaction settlement measuring device based on laser tracker

Abstract

The utility model relates to the technical field of foundation treatment construction, in particular to an automatic compaction settlement measuring device based on a laser tracker. Comprising a laser tracker, a reflector, a vehicle-mounted controller, a tension sensor and an engineering computer, the reflector is connected to a rammer hook head, and the laser tracker is connected to the front end of a rammer cab and used for automatically recognizing the position of the hook head and measuring and calculating the included angle between the connecting line of the laser tracker and the hook head and the horizontal line and the relative elevation of the laser tracker and the hook head; the tension sensor is connected to a rammer steel wire rope main cable and used for detecting the moment when the tension of the steel wire rope main cable is larger than or equal to the calibrated rated gravity, and the laser tracker and the tension sensor are connected with the engineering computer through the vehicle-mounted controller. The device has the functions of high measurement precision, real-time measurement and the like, and is not easy to fail or damage. Measurement results can be processed and uploaded on site. The device has the advantages of low power consumption, high detection precision, good real-time performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation treatment construction, in particular to an automatic measuring device for tamping amount based on a laser tracker. Background Art

[0002] Dynamic tamping refers to the process of dropping a heavy hammer weighing tens to hundreds of tons from a height of several meters to dozens of meters to perform dynamic tamping on the soil, which causes the soil to be compacted to reduce its compressibility and increase its strength. This process is simple to operate, has a significant reinforcement effect, high efficiency, low construction cost, and saves investment. Therefore, dynamic tamping is widely used in foundation reinforcement construction. In order to ensure the effect of dynamic tamping construction, the amount of tamping is one of the important parameters for evaluating the quality of dynamic tamping. At present, the main means of measuring the amount of tamping is for surveyors to manually use a level to complete the measurement. This method affects construction efficiency and requires a large number of people, and the construction cost is high.

[0003] Chinese patent CN 219572950 U discloses a device for measuring the tamping amount of a dynamic compaction replacement foundation. However, the laser level of the device is mounted on the tamping hammer. During the tamping process, the high-precision instrument is very likely to fail or be damaged. In addition, the device cannot accurately determine the shape of the tamping hammer and has poor accuracy. Utility Model Content

[0004] In view of the above problems, the utility model proposes an automatic measuring device for tamping amount based on a laser tracker.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0006] An automatic measuring device for tamping amount based on a laser tracker is characterized in that it includes a laser tracker, a reflector, a vehicle-mounted controller, a tension sensor, and an engineering computer. The reflector is connected to the hook head of a tamping machine. The laser tracker is connected to the front end of a tamping machine cab and is used to automatically identify the position of the hook head and measure the angle between the line connecting the laser tracker and the hook head and the horizontal line and the relative elevation between the two. The tension sensor is connected to the main wire rope of the tamping machine and is used to detect the moment when the tension of the main wire rope is greater than or equal to the calibrated rated gravity. The laser tracker and the tension sensor are connected to the engineering computer through the vehicle-mounted controller.

[0007] The hook head position and the rammer position are constant under normal working conditions.

[0008] The laser tracker and the reflector should be installed in the same vertical working plane.

[0009] The engineering computer comprises a dynamic compaction data processing unit, which comprises a laser rangefinder angle correction module, a wire rope inclination error correction module, and a measurement data analysis module.

[0010] The calibrated rated gravity is set according to the tension sensor model, and the calibrated rated gravity is greater than the weight of the wire rope and the hook head.

[0011] The laser tracker and the tension sensor are both connected to the vehicle-mounted controller via cables, and the vehicle-mounted controller and the engineering computer are connected via a communication unit, which includes 5G signal communication and early warning signal feedback.

[0012] The device is suitable for strong compaction construction with a strong compaction energy level greater than 10000kJ.

[0013] The utility model has the functions of high measurement accuracy and real-time measurement, and is not easy to fail or damage. The measurement results can be processed and uploaded on-site. The device has the advantages of low power consumption, high detection accuracy, and good real-time performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the working state of the utility model when the rammer is lifted for the first time;

[0015] Figure 2 This is a schematic diagram of the working state of the utility model when the rammer is lifted for the second time;

[0016] In the figure: 1-laser tracker, 2-reflector, 3-hook head, 4-rammer, 5-vehicle controller, 6-tension sensor, 7-engineering computer. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited to the specific embodiments. Example 1

[0018] like Figure 1-Figure 2 As shown, an automatic measuring device for tamping amount based on a laser tracker includes a laser tracker 1, a reflector 2, a vehicle-mounted controller 5, a tension sensor 6, and an engineering computer 7. The reflector 2 is connected to the hook head 3 of the tamping machine. The laser tracker 1 is connected to the front end of the tamping machine cab and is used to automatically identify the position of the hook head 3 and measure the angle between the line connecting the laser tracker 1 and the hook head 3 and the horizontal line and the relative elevation between the two. The tension sensor 6 is connected to the main cable of the tamping machine wire rope and is used to detect the moment when the tension of the main cable of the wire rope is greater than or equal to the calibrated rated gravity. The laser tracker 1 and the tension sensor 6 are connected to the engineering computer 7 through the vehicle-mounted controller 5.

[0019] The position of the hook head 3 and the position of the rammer are constant under normal working conditions.

[0020] The laser tracker 1 and the reflector 2 should be installed in the same vertical working plane.

[0021] The engineering computer 7 includes a dynamic compaction data processing unit, which includes a laser rangefinder angle correction module, a wire rope tilt error correction module, and measurement data analysis.

[0022] The calibrated rated gravity is set according to the model of the tension sensor 6, and the calibrated rated gravity is greater than the gravity of the wire rope and the hook head 3.

[0023] The laser tracker 1 and the tension sensor 6 are both connected to the vehicle-mounted controller 5 via cables, and the vehicle-mounted controller 5 and the engineering computer 7 are connected using a communication unit, which includes 5G signal communication and early warning signal feedback.

[0024] The device is suitable for strong compaction construction with a strong compaction energy level greater than 10000kJ. Example 2

[0025] The specific measurement process of the utility model includes the following steps.

[0026] S1: Install a tension sensor 6 on the main cable of the tamping machine wire rope;

[0027] S2: Install a laser tracker 1 at the front end of the rammer cab;

[0028] S3: Install the reflector 2 on the hook head 3 of the rammer;

[0029] S4: Connect 7 the laser tracker 1, the tension sensor 6, the vehicle controller 5 and the engineering computer and test;

[0030] S5: Figure 1 , the rammer is lifted for the first time, and the steel cable and hook 3 are lifted upward by the device, until the tension sensor 6 detects that the tension of the main cable of the steel wire rope is greater than or equal to the calibrated rated gravity (i.e., F tension ≥ G rated), the laser tracker 1 determines the position of the hook head 3, and calculates the angle α1 between the line connecting the laser tracker 1 and the hook head 3 and the horizontal line;

[0031] S6: Figure 2 After the first tamping is completed, the device controls the steel cable and the hook head 3 to be lifted up for the second time until the tension sensor 6 detects that the tension of the main cable of the steel wire rope is greater than or equal to the calibrated rated gravity (i.e., F tension ≥ G rated), and the laser tracker 1 measures the position of the hook head 3 again, and calculates the angle α2 between the line connecting the laser tracker 1 and the hook head 3 and the horizontal line;

[0032] S7: Calculate the tamping amount. The horizontal distance between the laser tracker 1 and the hook head 3 is constant. According to the angles α1 and α2 measured by the hook head 3 at different positions twice after one tamping, the engineering computer 7 calculates the elevations H1 and H2 of the horizontal position of the laser tracker 1. Then the tamping amount L1 = H1-H2.

[0033] S8: Repeat steps S5, S6, and S7 until all tamping times of the tamping point are completed, and the tamping amount of all tamping times is measured and recorded.

[0034] S9: Determine the total tamping amount of the current tamping point and the tamping amounts of the last two strikes, compare them with the design requirements, and determine whether the tamping quality is qualified.

[0035] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be done by other technical personnel in this field without expending creative labor falls within the protection scope of the present invention.

Claims

1. An automatic measuring device for tamping amount based on a laser tracker, characterized in that: It includes a laser tracker, a reflector, a vehicle-mounted controller, a tension sensor, and an engineering computer. The reflector is connected to the hook head of the rammer. The laser tracker is connected to the front end of the rammer cab and is used to automatically identify the position of the hook head and measure the angle between the line connecting the laser tracker and the hook head and the horizontal line and the relative elevation between the two. The tension sensor is connected to the main cable of the rammer wire rope and is used to detect the moment when the tension of the main cable of the wire rope is greater than or equal to the calibrated rated gravity. The laser tracker and the tension sensor are connected to the engineering computer through the vehicle-mounted controller.

2. The automatic measuring device for tamping amount based on a laser tracker according to claim 1, characterized in that: The hook head position and the rammer position are constant under normal working conditions.

3. The automatic measuring device for tamping amount based on a laser tracker according to claim 1, characterized in that: The laser tracker and the reflector should be installed in the same vertical working plane.

4. The automatic measuring device for tamping amount based on a laser tracker according to claim 1, characterized in that: The engineering computer comprises a dynamic compaction data processing unit, which comprises a laser rangefinder angle correction module, a wire rope inclination error correction module, and a measurement data analysis module.

5. The automatic measuring device for tamping amount based on a laser tracker according to claim 1, characterized in that: The calibrated rated gravity is set according to the tension sensor model, and the calibrated rated gravity is greater than the weight of the wire rope and the hook head.

6. The automatic measuring device for tamping amount based on a laser tracker according to claim 1, characterized in that: The laser tracker and the tension sensor are both connected to the vehicle-mounted controller via cables, and the vehicle-mounted controller and the engineering computer are connected via a communication unit, which includes 5G signal communication and early warning signal feedback.

7. The automatic measuring device for tamping amount based on a laser tracker according to any one of claims 1 to 6, characterized in that: The device is suitable for strong compaction construction with a strong compaction energy level greater than 10000kJ.

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