JP3500905B2 - Embankment compaction management method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing embankment compaction using, for example, a GPS system.

[0002]

2. Description of the Related Art In embankment work, it is necessary to uniformly and sufficiently compact the embankment surface in order to obtain the required strength of earth and sand loosened by excavation and transportation as an earth structure.

Controlling the degree of compaction includes visual control of the thickness of sprinkling, the number of compactions, the type of compaction and the compaction speed, and a test method as a visual aid.

Of these, the management method by the test is as follows:
A method of digging a hole on the construction surface and replacing it with sand or the like to obtain the volume, weight (density), or the like, or a method of digging the soil at the compacted construction site to obtain the weight of the soil are commonly used.

However, this test method has the following technical problems.

[0006]

[Problems to be Solved by the Invention] First,
The embankment works such as landfills and dams have very large flat areas, and it was difficult to evaluate the overall quality from the measurement data within the limited budget.

In order to improve the quality control evaluation, it is necessary to increase the number of measurement data. In this case, however, the large area requires a lot of labor and time, which leads to an increase in cost. Was becoming.

Even if the measurement is carried out at a large number of sampling points in this way, it is not possible to easily confirm if there is a part of insufficient compaction or there is an unrolled pressure part. However, even if the majority of the inspection results meet the criteria, it cannot be said that they completely control the entire construction area.

By the way, a method for precisely measuring the moving direction and moving height of a mobile station with respect to a reference station using a GPS system, and a differential GPS (for displaying this on a monitor screen or recording a moving track) Below DG
The method called PS) has been established. Of the signals obtained from GPS satellites, the C / A code that can be used by the private sector has low accuracy by itself, but by adopting such a DGPS system, the relative distance between the two can be measured with extremely high accuracy. .

Further, in order to automate compaction management, a method of attaching a sensor such as a vibrating roller or a tamping roller, which can indirectly measure compaction density to a compaction working vehicle, has been recently adopted.

The present invention has been made based on the above-mentioned points of view, and an object thereof is to monitor a movement locus of a compaction work vehicle as a mobile station by means of a GPS system and to make a tightening according to the movement locus. It provides a compaction management method for embankments that can also control the degree of compaction.

[0012]

In order to achieve the above object, the invention according to claim 1 of the present invention is a reference station provided with a GPS receiver of a differential GPS system, and data link to the reference station. It comprises a compaction work vehicle as a mobile station equipped with a GPS receiver, and a reception station for receiving information on the compaction work vehicle. The compaction work vehicle includes a compaction density sensor in addition to the GPS receiver. Recording means for recording the measurement result measured by the sensor together with the current position information,
The data transmitting means for transmitting the recorded content is provided, and the receiving station is provided with the data receiving means for receiving the recorded content and the data processing means connected to the data receiving means for processing the received data. wherein the movement locus of the rolling compaction work vehicle, recorded compaction data, to be displayed on the front
Compact by combining with the altitude measurement result by GPS receiver
It is an feature that you manage the order degree.

Note that the DGPS method referred to in the present invention refers to a reference station whose accurate position is measured in advance,
An error component is detected from the received pseudo range from each satellite, time information, and orbital data, and the error component is transmitted to the mobile station as a correction value. The mobile station uses the value to detect the GPS signal received by the receiver of the mobile station. It is to make a correction.

Therefore, according to the first aspect of the present invention, the receiving station can grasp the movement locus of the compaction work vehicle and all the compaction data along the movement locus.

According to a second aspect of the present invention, in the compaction work vehicle, means for comparing an actual compaction density according to a measurement result of the sensor with a predetermined standard compaction density. And an alarm generating means for generating an alarm output when the actual compaction density does not reach the reference compaction density and / or exceeds the reference compaction density. is there.

Therefore, according to the second aspect of the present invention, whether the compaction compaction density has reached the reference value according to the alarm output or not is the operator operating the compaction work vehicle. Therefore, the work can be continued by moving to the next compaction position without necessarily performing the compaction work by reciprocating the specified number of times.

[0017]

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows a system configuration diagram for carrying out the method of the present invention. In the figure, 1 is a reference station arranged at an appropriate position in the work site, 2 is a compaction work vehicle as a mobile station traveling in a work area A in the work site, and 3 is a compaction work in the work site. It is a control room provided in a part of the temporary construction office that receives data from the car 2 and processes this data.

The reference station 1 is a GPS from a plurality of GPS satellites.
GPS receiver 4 including an antenna for receiving signals, and GPS
The reference station 1 includes a data processor 5 connected to the receiver 4, a data link transmitter 6 including an antenna, an interface device, and the like, and the reference station 1 is arranged at a position with a good view such as no radio wave blocking.

In some cases, such as airports, a DGPS reference station or the like is installed in a control tower, and in the case of construction at such a place, this can be used as the reference station 1.

As shown in FIGS. 1 and 2, the compaction work vehicle 2 includes a GPS receiver 7 including an antenna for receiving signals from the GPS satellites, a data processor 8, and a data link receiver 9 including an antenna. , And a DGPS receiver including an interface device and the like.

Further, the compaction work vehicle 2 has the above DGP.
Along with the S receiving device, the density measuring device 12 including the compaction density detecting sensor 11 and the detection result of the sensor 11 are converted into the actual compaction density, and the current position coordinates differentially corrected by the DGPS are also taken in, etc. And a data transmitter 14 including an antenna for transmitting the compaction density data and the present position coordinates which are connected to the personal computer 13 and are connected to the personal computer 13. .

The antennas are arranged so as to project on the canopy of the compaction work vehicle 2, the display of the personal computer 13 is installed at a position where the operator can easily see, the sensor 11 is arranged at the lower part of the vehicle body, and other devices are in the driver's seat. It is placed all together with the back surface having fall prevention measures and anti-vibration measures.

The control room 3 is connected to a receiver 15 including an antenna for receiving the data sent from the data transmitter 14 and an output end of the receiver, and processes the sent data by various user interfaces. Then
A large-sized personal computer 16 as a data processing means for displaying and recording, a printer, a plotter, a peripheral device attached to a personal computer such as a communication modem, and a set of auxiliary devices are provided.

It should be noted that it is possible to equip both the compacting work vehicle 2 and the control room with transceivers so that the personal computers 13 and 16 can communicate with each other bidirectionally. It is also possible to send an instruction to the operator who operates the compaction work vehicle, or to separately provide wireless communication devices on both sides and thereby to communicate with each other.

As the compaction work vehicle 2, there are a vibration roller, a compaction roller and the like. Further, the density measuring device 12
Measures indirectly the degree of compaction, and the following measuring device can be used.

A) RI-type water / density measuring device The density and water content are indirectly measured by radioisotopes. b) Electromagnetic wave type compaction degree measuring device Since the speed of electromagnetic waves is affected by the water content ratio and dry density of soil, the correlation is grasped in advance and the density is indirectly measured. c) The density is indirectly measured from the phenomenon that the reaction force when vibration is applied by the vibrating roller changes with the compacted state. In this case, the accuracy is improved by measuring the waveform (amplitude) in combination with the accelerometer.

Further, the above various measuring devices and the altitude measurement results obtained by the GPS receiver can be used in combination. By capturing four or more GPS satellites, the GPS receiver can detect not only azimuth but also altitude in cm units. In addition to the data from the above measuring devices, data such as the amount of subsidence at the working position can be obtained from a personal computer. If the present altitude is compared with the previous altitude by taking in 16 and analyzing it, the compaction degree at the working position can be managed more accurately.

In the above construction, the compaction work vehicle 2 reciprocates for a predetermined length and compacts, and repeats the work of moving to the next work place.

FIG. 3 shows the locus of movement. By repeating the reciprocating operation from the starting point of the work area A, moving to the next lane after traveling to the end of the work area A, the same operation is repeated. Work to compact up to the final point is performed. This movement locus is taken into the personal computer 16 on the control center 3 side, and the movement locus of the compaction work vehicle 1 is displayed on the display as shown by the slanted lines in the figure.

The number of reciprocations of the compaction work vehicle 2 is set to a prescribed number in advance, and the personal computer 13 takes in the data measured by the density measuring device 12 for each reciprocation and compacts a predetermined standard. The actual compaction density corresponding to the measurement result of the sensor 11 is compared with the density, and when the actual compaction density exceeds the reference density, an alarm output is generated.

For example, this state may be displayed on the display of the personal computer 13 or a voice such as "Compact density reached, please proceed next" can be output by voice.

When the specified number of round trips is reached, an alarm output is generated even if the reference density has not been reached. For example, in the case of voice, "The specified number of times has been reached, please proceed to the next. Is output.

The above-mentioned working conditions are the control center 3
Although not shown, the number of rolling compactions and the pass / fail of the compaction degree are recorded on each screen of the personal computer 16 on one side, although not shown.

Therefore, if compaction is performed well,
Even if the specified number of reciprocations is not reached, it is possible to proceed to the next rolling operation, so that no extra time is taken.

Further, since the position of the portion that has not reached the standard compaction density is immediately specified, it is possible to immediately perform the removal and replacement work of the earth and sand at that position.

For example, by taking a user interface such as changing the color display of the failed portion on the display screen of the personal computer 16, the failed area can be easily specified.

Of course, the compaction work vehicle 2 can be operated unmanned under the control of the control center.

[0039]

As is clear from the above description, in the embankment compaction management method according to the present invention, the movement locus of the compaction work vehicle is monitored by the GPS system and the compaction according to the movement locus is performed. Since the degree of compaction can also be controlled, the work area can be inspected in real time at the same time as the work, as compared to the conventional measurement method. Further, regardless of the prescribed round trip, if the standard is satisfied, it is possible to move to the next compaction point, so that waste of work can be eliminated. Furthermore, it is extremely effective for early detection of defective parts.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an overall outline of a system configuration for carrying out a method of the present invention.

FIG. 2 is a system configuration diagram provided in a compaction work vehicle.

FIG. 3 is a schematic diagram showing a movement trajectory of a compaction work vehicle.

[Explanation of symbols]

1 reference station 2 compaction work vehicle 3 control center 4 GPS receiver 6 Data link transmitter 7 GPS receiver 9 Data link receiver 11 Compaction density detection sensor 13, 16 PC 14 Data transmitter 15 Data receiver

Claims (2)

(57) [Claims] 1. A GPS receiver of a differential GPS system
A base station equipped with a signal receiver and a GP for data linking to the base station
A compaction work vehicle as a mobile station equipped with an S receiver, and a receiving station for receiving information from the compaction work vehicle, wherein the compaction work vehicle includes compaction density in addition to the GPS receiver. A sensor, a recording unit that records the measurement result measured by the sensor together with the current position information, and a data transmitting unit that transmits the recorded content are provided, and the receiving station includes a data receiving unit that receives the recorded content, and a data receiving unit. A data processing means is provided which is connected to the receiving means and processes the received data. The data processing means records and displays the compaction data together with the movement track of the compaction work vehicle, and the altitude measurement by the GPS receiver. The result and
Compaction management method embankment characterized that you manage compaction degree in combination. 2. A means for comparing an actual compaction density according to a measurement result of the sensor with respect to a predetermined standard compaction density, and the actual compaction density having the actual compaction density of the compaction work vehicle. The embankment compaction management method according to claim 1, further comprising: an alarm generation unit that generates an alarm output when the density has not reached and / or when the density exceeds the reference density.