KR101018479B1 - Apparatus and method for management of soil compaction - Google Patents

Abstract

The present invention relates to a ground compaction work management device and a method thereof, and the compaction work management device for managing compaction work of the ground by using a vibration device that presses the ground and compacts the ground according to the present invention is the vibration device. A vibration acceleration sensor measuring an acceleration waveform indicating a time change in the vibration acceleration of the sensor; First calculating means for analyzing the acceleration waveform to calculate a change characteristic value of the vibration acceleration; And second calculation means for calculating a ground compaction degree which is a degree of compaction of the ground by the vibration device using the change characteristic value of the vibration acceleration and the compaction characteristic value of the ground.

Ground, Compaction, Vibration Acceleration, Vibration Roller, Compaction, Ground Strength, GPS, Civil Engineering

Description

Ground compaction work management device and method therefor {APPARATUS AND METHOD FOR MANAGEMENT OF SOIL COMPACTION}

The present invention relates to a ground compaction management technology in civil engineering, and more particularly, to a compaction work management apparatus and method for mounting on a vibrating roller for compacting ground in a civil engineering construction to enable real-time management of ground compaction.

In general, compaction in civil engineering means firmly compacting with rollers on a certain soil at a construction site. Through such a commitment, the fill material at the construction site is made firm with uniform density to prevent inadequate construction and minimize the cost of repair or repair work.

In such a construction site, it can be said that the compaction speed and compaction speed of the roller determine the quality of the fill. Therefore, in order to compact the work according to accurate criteria, it is necessary to accurately determine the density of the fill material in real time and determine the number of compaction and compaction speed of the roller. However, at present, the compaction work on the construction site is performed by subjective judgment based on the experience of the roller worker, and also the compaction of the entire area based on representative test values obtained at an arbitrary point after the compaction work is completed. It is judged whether this uniformly made of desired intensity | strength. Therefore, there is a problem that the reliability of the compaction operation is deteriorated, and there is also a problem that wastes time and personnel to check the representative test value at any point.

In addition, since the work management in a wide range of areas during compaction work on the construction site is performed only by the supervisors of a small number of workers, there is a problem that it is impossible to accurately grasp the work situation and manage the work efficiently, There is a problem of the departure of the path and the fall and fall accident of the roller in the workplace. As a result, there is a risk of inadequate construction, and there is a problem in that construction defects or repair-related costs increase.

The present invention has been made in order to solve the above problems, by measuring the repulsion force generated in the roller to perform the compaction work in the construction site to measure the compaction of the ground compaction to enable reliable compaction work for the entire compaction area It is an object of the present invention to provide a work management apparatus and method thereof.

In addition, the present invention, by using the GPS technology to manage the compaction work in the construction site in real time to prevent accidents due to unskilled roller workers in advance and to provide a compaction work management apparatus and method capable of real-time management of the compaction work There is another purpose.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention for achieving the above object, the compaction operation management device for managing the compaction operation of the ground by using a vibration device for applying pressure to the ground to compact the ground, the time of vibration acceleration of the vibration device A vibration acceleration sensor for measuring an acceleration waveform indicating a change; First calculating means for analyzing the acceleration waveform to calculate a change characteristic value of the vibration acceleration; And second calculation means for calculating a ground compaction degree which is a degree of compaction of the ground by the vibration device using the change characteristic value of the vibration acceleration and the compaction characteristic value of the ground.

Preferably, the compaction task management apparatus according to the present invention comprises a position data receiver for receiving position data from a satellite; And ground compaction degree display processing means for displaying the ground compaction degree information calculated by the second calculation means in a map area corresponding to the received position data.

In addition, the compaction operation management apparatus according to the present invention, using the received position data to calculate the number of compaction of the vibration device for the travel path of the vibration device and compaction operation display for displaying the information of the compaction number on the map It may further include a processing means.

In addition, the compaction work management apparatus according to the present invention may further include an alarm means for outputting an alarm when the vibration device is close to a dangerous area or when the compaction work area is separated using the received position data. .

In addition, according to another aspect of the present invention for achieving the above object, the compaction work management method in the compaction work management apparatus for managing the compaction work of the ground by using a vibration device for applying pressure to the ground to compact the ground, Measuring an acceleration waveform indicating a time change in vibration acceleration of the vibration device; Analyzing the measured acceleration waveform to calculate a change characteristic value of the vibration acceleration; And calculating a ground compaction degree, which is a degree of compaction of the ground by the vibration device, by using the calculated change characteristic value of the vibration acceleration and the compaction characteristic value of the ground.

According to the present invention as described above, by accurately measuring the compaction degree of the compaction area by using the repulsion force generated in the roller to perform the compacting operation it is possible to prevent poor construction and ensure the reliability of compaction construction. In addition, by managing the compaction work in real time, it is possible to increase the efficiency of compaction work and to prevent safety accidents.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a compaction management apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the compaction work management apparatus 100 according to the present embodiment includes a vibration acceleration sensor 101, an input unit 103, a control unit 105, a screen display unit 107, and a storage unit 109. It includes.

The vibration acceleration sensor 101 is mounted on a vibration roller that performs ground compaction work on a construction site, and measures the repulsive force generated when the vibration roller applies a force in a vertical direction to the ground in the form of acceleration. The vibrating roller is driven to rotate along the direction of compaction and performs ground compaction. Preferably, the vibration acceleration sensor 101 is attached to the vibration central axis of the vibration roller to measure the acceleration. 9 illustrates an example in which the vibration acceleration sensor 101 is attached to the vibration shaft 904 of the vibration roller 901. The roller center shaft is connected to the rotating drum 903 inside the roller frame 902 of the vibration roller 901. The vibration acceleration sensor 101 is mounted at 904. Since the vibrating roller is a device commonly used for ground compaction, detailed description thereof will be omitted.

The input unit 103 receives various input signals from a user who operates the vibrating roller and outputs them to the control unit 105. Specifically, the input unit 103 is a ground compaction characteristic value and the like of the construction site is input. Data values input through the input unit 103 are stored in the storage unit 109.

The control unit 105 receives the acceleration measurement data measured by the vibration acceleration sensor 101 from the vibration acceleration sensor 101, and uses the received acceleration measurement data to form a ground compaction currently being performed. In other words, the strength of the ground is calculated and stored in the storage unit 109 and displayed on the screen display unit 107.

Preferably, the data measured by the vibration acceleration sensor 101 is an acceleration waveform, and the controller 105 analyzes the acceleration waveform to calculate a vibration acceleration change characteristic value and calculates ground compaction based on the storage unit. 109 and display on the screen display unit 107.

In addition, the control unit 105 displays an alarm when the ground compaction degree is greater than or equal to the threshold value so that the vibrating roller operator moves to the next work area and works.

The screen display unit 107 is a liquid crystal display (LCD) or the like and displays the ground compaction degree, various data related to the ground compaction, etc. on the screen under the control of the control unit 105.

FIG. 2 is a diagram illustrating a detailed configuration of the controller of FIG. 1. As shown in FIG. 2, the controller 105 of FIG. 1 includes an FFT module 201, a vibration acceleration change characteristic value calculation module 203, and a ground compaction diagram. The calculation module 205 is included.

The Fast Fourier Transform (FFT) module 201 receives the acceleration waveform of the time domain measured by the vibration acceleration sensor 101 from the vibration acceleration sensor 101 and performs a fast Fourier transform to the frequency domain. 3A is a graph showing an acceleration waveform measured by the vibration acceleration sensor 101, and FIG. 3B is a frequency spectrum graph obtained by fast Fourier transforming the acceleration waveform of (a). As shown in FIG. 3B, the acceleration waveform measured by the vibration acceleration sensor 101 has multiple frequencies instead of a single frequency. In the case of soft ground under ideal conditions, the acceleration waveform shows a single frequency, but in actual ground, the acceleration waveform shows a multi-frequency spectrum as shown in FIG.

The vibration acceleration change characteristic value calculating module 203 calculates the vibration acceleration change characteristic value by using the amplitude magnitude of each frequency shown in the spectrum of the frequency domain converted by the FFT module 201. An example of an equation for calculating the vibration acceleration variation characteristic value is shown in Equation 1 below. The oscillation acceleration change characteristic value is the ratio of the sum of the amplitude magnitudes of the entire frequencies to the amplitude magnitudes of the fundamental frequencies. Equation 1 below is an example of an operation formula for calculating the vibration acceleration change characteristic value, but is not limited thereto.

Vibration acceleration change characteristic value (V _c ) = (a + b + c) / a

Where a is an amplitude magnitude of the fundamental frequency f ₁ , b is an amplitude magnitude of the sub-frequency f ₂ , and c is an amplitude magnitude of the sub-frequency f ₃ .

The ground compaction degree calculation module 205 calculates the ground compaction degree using the vibration acceleration change characteristic value calculated and output from the vibration acceleration change characteristic value calculation module 203 and the ground compaction characteristic value stored in the storage unit 109. When the ground is a fully elastic body, the ground compaction degree can be accurately calculated even by using only the vibration acceleration change characteristic value. However, the ground generally includes moisture and should have plasticity properties and reflect the characteristics accordingly. The calculation formula in the ground compaction degree calculation module 205 is expressed by Equation 2 below.

Ground compaction level = ground compaction characteristic value (C _c ) / vibration acceleration variation characteristic value (V _c )

=

Here, Ec is a compaction energy coefficient calculated from the weight of the vibrating roller, the number of vibrations, and the compaction speed of the vibrating roller. Ec is the actual compaction energy divided by the compaction energy in the laboratory test. ω _n is a water content coefficient, which is a value obtained by dividing the actual water content at the time of compaction by the optimum water content ratio. Since the optimum water content is a term widely used in the field of soil mechanics, a description thereof will be omitted.

The ground compaction characteristic value E _c / ω _n has a constant value between 0.8 and 1.2 depending on the ground, and is inserted to correct the difference between the ideal elastic ground and the actual ground. That is, the ground compaction degree is expressed as [Equation 2] because the constant value inserted to correct the difference between the ideal elastic ground and the actual ground is empirically identical with (E _c / ω _n ).

It is common practice to carry out a test fill (ie an indoor test) to determine the number of compacts, compaction thickness, etc. of the fill material for the best compaction work before actual fill work is performed. In the test fill, the compaction test is carried out at the optimum water content with a predetermined compaction energy. In this process, the compaction frequency and compaction thickness are determined for the best compacting operation. However, in actual fill construction, the compaction energy and water content may be different from those in the test fill.

4 is a block diagram of a compaction task management apparatus according to another embodiment of the present invention.

Unlike FIG. 1, the compaction work management apparatus 400 of the present embodiment with reference to FIG. 4 further includes a GPS receiver 401, and the control unit 105 includes a ground compaction degree display processing module 403 and a compaction job display processing module ( 405 and hazardous area warning alarm module 407. Components having the same reference numerals as those of FIG. 1 should be understood to include all the functions of FIG. 1.

The storage unit 109 stores map data for the ground compaction area. The compaction map data divides the ground compaction area into a predetermined number of blocks according to the work path, and includes dangerous area information. In addition, the storage unit 109 stores the position data received from the GPS receiver 401. Preferably, the position data is mapped and stored as the driving route of the vibrating roller to the map data.

The GPS receiver 401 receives the current position data of the compaction task management apparatus through the GPS antenna and outputs it to the controller 105. Preferably, the GPS receiver 401 receives both the position data from the satellite 409 and the position data from the reference station 411 to eliminate the position error. Since the reference station 411 is located at a fixed position, when the position data is received from the satellite 409, the position station 411 compares the position data with its position and calculates and transmits a position error. The GPS receiver 401 obtains accurate position data by removing the error of the current position by combining the position error and the position data received from the satellite 409.

On the other hand, the ground compaction degree display processing module 403 of the control unit 105 is a vibration roller running on the map data of the ground compaction area stored in the storage unit 109 by using the position data transmitted from the GPS receiver 401. The ground compaction degree of the travel route is displayed on the screen display unit 107 by color or graph. At this time, the ground compaction degree display processing module 403 uses the ground compaction degree data calculated by the ground compaction degree calculator 205 of the controller 105.

In addition, the compaction job display processing module 405 of the control unit 105 uses the position data transmitted from the GPS receiver 401 to operate the vibration roller on the map data of the ground compaction area stored in the storage unit 109. The compaction operation status information, such as compaction count and compaction thickness of the travel route, is displayed on the screen display unit 107. The number of compactions is counted using the position data traveled by the vibration roller, and the compaction thickness can be known using the altitude information included in the position data.

In addition, the dangerous zone warning alarm module 407 of the control unit 105, the vibration roller using the location data transmitted from the GPS receiver 401, the map data stored in the storage unit 109 and the dangerous zone information, the dangerous zone. In case of entering or exiting the compaction path, an alarm screen is popped up on the screen display unit 107 or an alarm sound is output through the speaker.

5 is a flowchart illustrating a ground compaction management method of the compaction task management apparatus according to an exemplary embodiment of the present invention.

As shown in FIG. 5, first, the compaction work management apparatus 100 receives and stores the ground compaction characteristic value of the ground to be compacted from the user through the input unit 103 (S501).

After storing the ground compaction characteristic value as described above, the compaction work management apparatus 100 measures the vibration acceleration waveform by using the vibration acceleration sensor 101 installed on the vibration shaft of the vibration roller while the compaction work of the vibration roller is in progress. (S503).

Next, the compaction work management apparatus 100 converts the measured acceleration waveform into a frequency domain by performing fast Fourier transform (S505), and changes the vibration acceleration using the amplitude magnitude of each frequency shown in the spectrum of the frequency domain. The characteristic value is calculated (S507). The oscillation acceleration change characteristic value is the ratio of the sum of the amplitude magnitudes of the entire frequencies to the amplitude magnitudes of the fundamental frequencies.

Next, the compaction work management apparatus 100 calculates the ground compaction degree by calculating and processing the calculated vibration acceleration change characteristic value and the ground compaction characteristic value stored in the step S401 (S509). Then, the compaction work management apparatus 100 displays the calculated ground compaction degree on the screen display unit 107 as a color, a graph, or a numerical value (S511).

As described above, the compaction work management apparatus according to the present invention calculates and displays the compaction degree of the ground on which the current compaction work is performed in real time during the compaction work of the vibrating roller, thereby allowing the operator to exclude the subjective judgment and objectively compact the work. . Therefore, the compaction is made uniformly over the entire area, and the reliability of the compaction work is increased.

6 is a flowchart illustrating a ground compaction management method of the compaction task management apparatus according to another embodiment of the present invention.

As illustrated in FIG. 6, the compaction work management apparatus 400 receives location data in real time through the GPS receiver 401 and stores the location data in the storage unit 109 when the compaction work of the vibrating roller proceeds (S601). . Next, the compaction operation management apparatus displays the trajectory corresponding to the received position data on the compaction area map data of the storage unit 109 (S603). That is, the running trajectory of the vibrating roller is displayed on the compaction area map data.

Then, the compaction job management apparatus 400 compares the received position data with the position data previously stored in the storage unit 109 to count the number of compactions (S605), and the color or text according to the counted compaction counts. And the like are displayed on the locus of the compaction area map data (S607).

In addition, the compaction work management apparatus 400 analyzes the received position data and displays the compaction thickness of the current ground in the compaction area map data (S609). Compaction thickness is also displayed in the map data in color or text form.

On the other hand, the compaction work management apparatus 400 checks whether the vibrating roller has entered the dangerous area by comparing the location data received in the step S601 with the dangerous area information stored in the storage unit 109 (S611). When entering the danger zone, the compaction work management device outputs an alarm indicating the entrance to the danger zone to the speaker or the screen display unit 107 (S613).

In addition, the compaction work management apparatus 400 compares the position data received in the step S601 with the compaction work area information stored in the storage unit 109 to determine whether the vibrating roller has left the compaction work area (S615). . In the case of departure, the compaction work management device outputs an alarm notifying the entrance of the danger zone to the speaker or the screen display unit 107 (S617).

After completing this process, the compaction task management apparatus 400 checks whether the compaction task is finished (S619), repeats the above-described process if the task is not finished, and completes the process if the task is finished. do.

According to the present invention, it is possible to prevent the problem of the deviation of the travel path due to the unskilled roller operator and the fall of the roller in the workplace by grasping the working situation in real time in a wide range of compaction areas.

FIG. 7 is a diagram illustrating a screen of a compaction task management apparatus according to an embodiment of the present invention, and is a screen displaying a job path guide line and a compaction count.

As illustrated in FIG. 7, the vibration roller 701 is displayed on the map data on the screen displayed by the compaction work management device, and the compaction work path guide line 703 is displayed on the map data. In addition, in the map data, the number of compactions by the vibrating roller 701 is displayed in color. A legend 705 for the number of compactions is displayed on the right side of the screen of FIG. 7, and the number of compactions is displayed in color in the map data according to the legend 705.

8 is a view showing a screen of the compaction work management apparatus according to another embodiment of the present invention, a warning display screen when approaching the danger zone.

As shown in FIG. 8, when the vibrating roller 701 approaches the danger zone 801, the compaction work management device displays a warning pop-up screen 803 for approaching the danger zone to alert the roller worker. .

The process of storing the method according to the present invention on a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) can be easily carried out by those skilled in the art. Therefore, it will not be described in detail any more.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

1 is a block diagram of a compaction management apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a detailed configuration of the controller of FIG. 1.

3 is a diagram illustrating an acceleration waveform and a frequency spectrum of the acceleration waveform measured by the vibration acceleration sensor.

4 is a block diagram of a compaction task management apparatus according to another embodiment of the present invention.

5 is a flowchart illustrating a ground compaction management method of the compaction task management apparatus according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating a ground compaction management method of the compaction task management apparatus according to another embodiment of the present invention.

7 is a view showing a screen of the compaction management apparatus according to an embodiment of the present invention.

8 is a view showing a screen of the compaction work management apparatus according to another embodiment of the present invention.

9 is a diagram in which a vibration acceleration sensor is attached to a vibration shaft of a vibration roller according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100, 400: compaction operation management device 101: vibration acceleration sensor

103: input unit 105: control unit

107: screen display unit 109: storage unit

Claims (15)

A compaction work management device for managing compaction work of the ground by using a vibration device for applying pressure to the ground to compact the ground, A vibration acceleration sensor for measuring an acceleration waveform indicating a time change in the vibration acceleration of the vibration device; First calculating means for analyzing the acceleration waveform to calculate a change characteristic value of the vibration acceleration; And And second calculation means for calculating a ground compaction degree which is a compaction degree of the ground by the vibration device using the change characteristic value of the vibration acceleration and the compaction characteristic value of the ground. The compaction characteristic value of the ground is a ratio of the compaction energy coefficient and the water content coefficient of the ground, The compaction energy coefficient is a value obtained by dividing the compaction energy applied to the ground by the vibration device at the site of the ground construction by the compaction energy in the indoor compaction test for the test soil of the ground, And said water content coefficient is a value obtained by dividing the water content of the ground at a fill construction site by the water content in an indoor test of test ground of the ground. The method of claim 1, Conversion means for converting the acceleration waveform into a frequency domain to derive a frequency spectrum; The first calculating means, And a change characteristic value of the vibration acceleration using the amplitude magnitudes of the plurality of frequencies shown in the frequency spectrum. delete The method of claim 1, A location data receiver for receiving location data from a satellite; And And ground compaction degree display processing means for displaying the ground compaction degree information calculated by the second calculation means in a map area corresponding to the received position data. The method of claim 4, wherein The ground compaction degree display processing means, Compaction task management apparatus characterized in that the color information of the ground compaction degree display. The method of claim 4, wherein The compaction operation display processing means for calculating the compaction number of the vibration device with respect to the driving route of the vibration device using the received position data and displaying the information of the compaction number on a map; Job Management Device. The method of claim 4, wherein And an alarm means for outputting an alarm when the vibration device is close to a dangerous area or when the vibration device is out of the compaction work area by using the received position data. The method according to any one of claims 5 to 7, The location data receiver, Compaction operation management apparatus characterized in that for receiving the position error data from the fixed reference station to remove the error of the position data received from the satellite. A compaction work management method in a compaction work management device that manages compaction work of the ground by using a vibration device that applies pressure to the ground to compact the ground, (a) measuring an acceleration waveform representing a change in time of vibration acceleration of the vibration device; (b) analyzing the measured acceleration waveform to calculate a change characteristic value of the vibration acceleration; And (c) calculating a ground compaction degree which is a compaction degree of the ground by the vibration device by using the calculated change characteristic value of the vibration acceleration and the compaction characteristic value of the ground; The compaction characteristic value of the ground is a ratio of the compaction energy coefficient and the water content coefficient of the ground, The compaction energy coefficient is a value obtained by dividing the compaction energy applied to the ground by the vibration device at the site of the ground construction by the compaction energy in the indoor compaction test for the test soil of the ground, And said water content coefficient is a value obtained by dividing the water content of the ground at a fill site by the water content in an indoor test of the test soil of the ground. The method of claim 9, Before step (b) above, Converting the acceleration waveform into a frequency domain to derive a frequency spectrum; In step (b), And a change characteristic value of vibration acceleration using the amplitude magnitudes of the plurality of frequencies shown in the frequency spectrum. delete The method of claim 10, (d) receiving location data from a satellite; And and (e) displaying the ground compaction degree information calculated in the step (c) on the map area corresponding to the received location data. 13. The method of claim 12, (f) calculating the number of compactions of the vibration device with respect to the driving route of the vibration device by using the received position data, and displaying the information on the number of compactions on a map. How to manage. 13. The method of claim 12, and (f) outputting an alarm when the vibration device is close to a dangerous area or when leaving the compaction work area by using the received position data. The method according to any one of claims 12 to 14, Before step (e) above, Receiving position error data from a fixed reference station to remove the error of the position data received from the satellite; Compaction management method further comprises.

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