JP2020169564A - Ground improvement device - Google Patents

Abstract

To provide a ground improvement device which enables a person other than a skilled operator to easily grasp a state of a work of a ground improvement tool when being penetrated into the ground in improvement of the ground using the ground improvement device.SOLUTION: A ground improvement device improves the ground by a sand compaction pile method. The ground improvement device has detection means which detects operation state data indicating operation states of a ground improvement tool when being penetrated into the ground, and has a monitor 60 as display means which displays image data in which a profile sketch of the ground improvement tool determined based on the operation status data detected by the detection means is drawn and a state of a work at real time is schematically indicated, in which the monitor 60 displays a state where a casing pipe determined based on the operation status data detected by the detection means is pulled upward, a state where sand is discharged, and a state where sand discharged by driving the casing pipe back and its peripheral ground are compacted, together with the profile sketch of the casing pipe of the ground improvement tool.SELECTED DRAWING: Figure 12

Description

The present invention relates to a ground improvement device used for improving the ground by a ground improvement method such as a sand compaction pile method, and in particular, a ground that can easily grasp the state of work of the ground improvement tool when it penetrates into the ground. Regarding improved equipment.

Conventionally, as a ground improvement method for improving the ground for the purpose of increasing the strength of the ground, a deep layer mixing treatment method, a high-pressure injection stirring method, a sand compaction pile method, a trencher type stirring and mixing method, and the like are known.

The improvement of the ground by the deep mixing treatment method, which is one of the ground improvement methods, will be described.
FIG. 13 is an explanatory view showing a process of improving the ground by the deep mixing treatment method.
First, as shown in FIG. 13, the ground improvement device used for improving the ground includes a construction machine 91 having a mast 93 to be erected, and the ground improvement tool 92 is attached to the construction machine 91. The ground improvement tool 92 is provided with two stirring shafts 94 that are vertically oriented along the mast 93 of the construction machine 91. In FIG. 13, since the two stirring shafts 94 are arranged on the front side and the back side, only one can be seen in the drawing. Each of the lower ends of the two stirring shafts 94 has a plurality of stages of stirring blades 95, and although not shown, the bottom stage stirring blade 95 has an ejection hole for ejecting cement milk as a solidifying material. There is.

Next, in order to improve the ground by the deep mixing treatment method, the two stirring shafts 94 of the ground improving tool 92 attached to the construction machine 91 are rotated, and the ground is excavated and stirred by the stirring blade 95 at the lower end of the stirring shaft 94. The shaft 94 and the stirring blade 95 penetrate into the ground. As shown in FIG. 13A, when the stirring shaft 94 and the stirring blade 95 are slightly penetrated into the ground, cement milk, which is a solidifying material, is ejected from the ejection holes of the stirring blade 95. Next, while ejecting cement milk, the stirring shaft 94 and the stirring blade 95 are penetrated, the ground is excavated by the stirring blade 95, and the excavated ground and cement milk are mixed and stirred. As shown in FIG. 13B, excavation of the ground and mixing and stirring of the excavated ground and cement milk are performed downward. This is done to a predetermined depth as shown in FIG. 13C. Then, as shown in FIG. 13D, the stirring shaft 94 and the stirring blade 95 penetrating to a predetermined depth are pulled out, and as shown in FIG. 13E, the stirring shaft 94 and the stirring blade 95 are pulled out to the ground surface. After these operations are completed, the cement milk mixed with the ground is solidified, so that a consolidation improved body T having a predetermined size is formed in the ground. In this way, by creating a large number of consolidation improved bodies T in the ground, the ground can be improved to be strong.

In the ground improvement using such a ground improvement device, in order to surely perform the work, the work is performed while grasping the state of the work such as the stirring shaft 94 and the stirring blade 95 of the ground improving tool 92 that has penetrated into the ground. We need to proceed. Therefore, the depth of the stirring shaft 94 and the stirring blade 95 penetrating into the ground and the penetration speed or the drawing speed thereof, the rotation speed of the stirring shaft 94 and the stirring blade 95 penetrating into the ground, and the ejection hole of the stirring blade 95 are ejected. Various detection data such as the amount of cement milk ejected as a solidifying material is detected by each detector, and based on each data detected by each detector, the depth is displayed on the screen of the monitor installed in the cab of the construction machine 91. The numerical value of each detection data for each and a bar graph of the numerical value are displayed (see Patent Document 1).

The operator works on the stirring shaft 94 and the stirring blade 95 of the ground improvement tool 92 that has penetrated into the ground while looking at the numerical value of each detection data for each depth displayed on the screen of the monitor and the bar graph of the numerical value. Based on this, each device of the ground improvement device is operated to perform the work.

However, if the numerical value of each detection data for each depth displayed on the screen of the monitor in the driver's cab and the bar graph of the numerical value are used, a skilled operator can work on the ground improvement tool 92 when it penetrates into the ground. However, for construction contractors and other construction personnel, only the numerical values of each detection data for each depth displayed on the monitor screen and the bar graphs of those numerical values are available. Then, it is difficult to grasp the state of work of the ground improvement tool 92 when it penetrates into the ground.

JP-A-2002-38463

The present invention has been made in view of such a problem, and an object of the present invention is to improve the ground using a ground improvement device, even for people other than skilled operators, when the ground penetrates into the ground. The purpose of the present invention is to provide a ground improvement device capable of easily grasping the working state of the improvement tool.

The present invention improves the ground by a sand compaction pile method in which a casing pipe of a ground improvement tool attached to a construction machine is penetrated into the ground, sand is discharged into the ground, and the discharged sand and the surrounding ground are compacted. It is a ground improvement device and has a detection means for detecting operation status data indicating the operation status of the ground improvement tool when it penetrates into the ground, and the detection means is a depth detector for detecting the depth of a casing pipe and a casing. A speed detector that detects the speed of pulling out and hitting the pipe, a rotation detector that detects the number of rotations of the casing pipe, a sand amount detector that detects the amount of sand that is put into the casing pipe, a rotating device, and an elevating device. It is a current detector that detects the current value of the drive unit to determine the hardness of the ground, and a diagram of the ground improvement tool obtained based on the operation status data detected by the detection means is drawn and the state of real-time work. The display means has a display means for displaying image data schematically showing the above, and the display means upwardly displays the casing pipe obtained based on the operation status data detected by the detection means together with the figure of the casing pipe of the ground improvement tool. It is a ground improvement device that displays the state of pulling out, the state of discharging sand, and the state of compacting the discharged sand and the surrounding ground by hitting the casing pipe back.

According to the present invention, the display means can intuitively understand the work state by displaying the image data in which the figure of the ground improvement tool is drawn and the state of the work is schematically shown in real time. As a result, not only skilled operators but also people other than skilled operators such as construction contractors and other construction personnel can easily grasp the state of work.

It is explanatory drawing which shows the whole of the ground improvement apparatus of this invention. It is a side view which shows the construction machine of the ground improvement device and the ground improvement tool. It is a front view which shows the lower end of the ground improvement tool of a ground improvement device. It is explanatory drawing which shows the screen of the monitor which is a display means. It is explanatory drawing which shows the screen of the monitor which is a display means. It is explanatory drawing which shows the screen of the monitor which is a display means. It is explanatory drawing which shows the screen of the monitor which is a display means. It is explanatory drawing which shows the screen of the monitor which is a display means. It is explanatory drawing which shows the communication means and the external display means in the ground improvement apparatus. It is a front view which shows the lower end of the ground improvement tool of another ground improvement device. It is explanatory drawing which shows the screen of the monitor which is the display means in another ground improvement apparatus. It is explanatory drawing which shows the screen of the monitor which is the display means in another ground improvement apparatus. It is explanatory drawing which shows the process of the improvement of the ground by the conventional deep-layer mixing treatment method.

An embodiment of the ground improvement device of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing the entire ground improvement device of the present embodiment, FIG. 2 is a side view showing a construction machine of the ground improvement device and a ground improvement tool, and FIG. 3 is a lower end of the ground improvement tool of the ground improvement device. It is a front view which shows.

The ground improvement device related to this embodiment is used for improving the ground by the deep mixing treatment method, which is one of the ground improvement methods.

As shown in FIG. 1, the ground improvement device includes a construction machine 1 that can run on its own, a ground improvement tool 2 that is attached to the construction machine 1 and penetrates into the ground to improve the ground, and the construction machine 1 and the ground. It is composed of peripheral equipment 3 installed around the improvement tool 2.

As shown in FIG. 2, the construction machine 1 is provided with a traveling body 11 at the lower portion and is equipped with an engine (not shown) so that it can run on its own. Further, it has a driver's cab 12, and a mast 13 is erected in front of the driver's cab 12.

As shown in FIG. 2, the ground improving tool 2 is a two-axis system in which two stirring shafts 21 vertically oriented along the mast 13 of the construction machine 1 are provided, and is provided above the two stirring shafts 21. In addition to having a rotating device 22, a lifting device 23 is provided between the stirring shaft 21 and the mast 13 of the construction machine 1 so that the two stirring shafts 21 can be rotated and moved up and down. In FIG. 2, since the two stirring shafts 21 are arranged on the front side and the back side, only one can be seen in the drawing. The stirring shaft 21 is made of a hollow steel pipe so that cement milk and compressed air, which are solidifying materials, can pass through the stirring shaft 21. Further, as shown in FIG. 3, each of the lower ends of the two stirring shafts 21 is provided with a plurality of stages, for example, three stages of stirring blades 24. At the lower ends of the two stirring shafts 21 having the stirring blades 24, the two stirring shafts 21 are connected via two upper and lower connecting arms 25. Further, the lowermost stirring blade 24 of the three-stage stirring blade 24 has an ejection hole 26 for ejecting cement milk as a solidifying material. Further, each of the lowermost stirring blade 24 and the lowermost lower end of the two stirring shafts 21 has a plurality of excavation bits 27 for excavating the ground.

The ground improvement tool of the present embodiment is a two-axis system in which two stirring shafts 21 are provided, but the present invention is not limited to this, and the single-axis system or three stirring shafts 21 are provided. A multi-axis system in which the above plurality of lines are provided may be used. Further, the three-stage stirring blade 24 at the lower end of the stirring shaft 21 is not limited to this, and may be one stage, two stages, or a plurality of stages of four or more stages.

As shown in FIG. 1, the peripheral equipment 3 is equipment for supplying cement milk as a solidifying material or compressed air to the two stirring shafts 21 of the ground improvement tool 2. The facility for supplying compressed air includes a compressor 31, and supplies compressed air from the compressor 31 to each of the two stirring shafts 21 of the ground improvement tool 2 via the air flow rate detector 32. The facility for supplying the solidifying material is provided with a cement producing plant 33, and in the cement producing plant 33, the cement raw material flows in from the cement silo 34 and water flows in from the water tank 35, and these are mixed to form a solidifying material. Produces some cement milk. The pipeline branches from the cement production plant 33 to send out the cement milk produced by the two grout pumps 36, and cement is applied to each of the two stirring shafts 21 of the ground improvement tool 2 via the two flow rate detectors 37a and 37b. Supply milk. Although not shown, each device in the peripheral equipment 3 is equipped with a generator.

The ground improvement device having such a configuration includes a detection means for detecting operation status data indicating the operation status of the ground improvement tool 2 when it penetrates into the ground.
As the detection means, a depth detector 41 that detects the depth of the stirring shaft 21 and the stirring blade 24 that penetrate into the ground, and a speed detector that detects the penetration speed or the withdrawal speed of the stirring shaft 21 and the stirring blade 24 into the ground. 42, a rotation detector 43 that detects the number of rotations of the stirring shaft 21 and the stirring blade 24, and a first flow detector 37a and a first flow detector 37a that detect the amount of cement milk that is a solidifying material supplied to the two stirring shafts 21. 2 Flow detector 37b Detects the amount of compressed air supplied to each of the two stirring shafts 21. Detects the current values of the drive units of the air flow detector 32, the rotating device 22, and the lifting device 23, respectively. A current detector 44 or the like for determining the hardness of the ground to be excavated. The data detected by each of these detectors becomes the operation status data indicating the operation status of the ground improvement tool 2.

Further, in the cab 12 of the construction machine 1, there is a processing device unit 50 that performs arithmetic processing and processing processing of operation status data indicating the operation status of the ground improvement tool 2 detected by each detector which is a detection means. The processing device unit 50 calculates, for example, the operation status data based on the operation status data detected by each detector which is a detection means in a computer to obtain the numerical data Gp for an image in the preprocessing stage. , The obtained numerical data Gp for an image is processed to obtain an image data G that schematically represents a state of real-time work by drawing a figure of a ground improvement tool.

The image data G, in which the figure of the ground improvement tool is drawn and schematically shows the state of real-time work, draws the figure of the ground improvement tool 2 on the screen and visually expresses it as if moving it. By doing so, it is possible to intuitively understand the state of real-time work, and in short, it is possible to grasp the image immediately after seeing it. Specifically, the penetration state and the rotational state, which are the depths of the stirring shaft 21 and the stirring blade 24 of the ground improvement tool 2 at the time of penetration, are shown to show that the ground is being excavated, and the stirring blade 24 It is also shown that cement milk, which is a solidifying material, is ejected from the ejection hole 26, and that the excavated ground and cement milk are mixed and agitated. It is also shown that the stirring shaft 21 and the stirring blade 24 of the ground improving tool 2 are pulled out at the time of pulling out.

A specific method of obtaining the image data G in which the figure of the ground improving tool in the processing apparatus unit 50 is drawn and the state of the real-time work is schematically shown will be described.
The state of excavation of the ground showing the penetration state and the rotational state, which are the depths of the stirring shaft 21 and the stirring blade 24 of the ground improvement tool 2 at the time of penetration, and the penetration of the stirring shaft 21 and the stirring blade 24 are completed. The state and the state of pulling out the stirring shaft 21 and the stirring blade 24 of the ground improvement tool 2 at the time of pulling out are obtained from each data detected by the depth detector 41, the speed detector 42 and the rotation detector 43 which are the detection means. .. Further, the state of ejecting cement milk, which is a solidifying material, is obtained from the data detected by the two flow rate detectors 37a and 37b and the air flow rate detector 32, which are the detection means. Further, the state in which the excavated ground and the cement milk are mixed and agitated is obtained from the data detected by the rotation detector 43 and the current detector 44, which are the detection means.
In this way, the image data G is obtained by drawing a figure of the ground improvement tool from the data detected by each detector and schematically showing the state of real-time work.

Further, the ground improvement device displays an image data G schematically showing the state of real-time work by drawing a figure of the ground improvement tool obtained by arithmetic processing and processing in the processing device unit 50. It has a display means.
As the display means, for example, a monitor 60 provided in front of the driver's seat in the driver's cab 12 of the construction machine 1.

In addition, on the screen of the monitor 60 which is a display means, an image data G in which a figure of the ground improvement tool is drawn and a state of real-time work is schematically displayed is displayed, and the displayed image data G is displayed. Next to, the numerical value N of the operation status data detected by each detector is also displayed at the same time.

Next, the screen of the monitor 60, which is a display means in the ground improvement by the deep mixing treatment method performed by using the ground improvement device, will be described. The improvement of the ground by the deep mixing treatment method is the same as the conventional method.
4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are explanatory views showing a screen of a monitor as a display means.

In the ground improvement by the deep mixing treatment method, the two stirring shafts 21 of the ground improving tool 2 attached to the construction machine 1 are rotated, and the ground is excavated by the stirring blade 24 at the lower end of the stirring shaft 21 to excavate the stirring shaft 21 and the stirring shaft 21. The stirring blade 24 penetrates into the ground. After the stirring shaft 21 and the stirring blade 24 are slightly penetrated into the ground, the cement milk M which is a solidifying material is ejected from the ejection hole 26 of the stirring blade 24. Next, the stirring shaft 21 and the stirring blade 24 are penetrated while ejecting the cement milk M, the ground is excavated by the stirring blade 24, and the excavated ground and the cement milk M are mixed and stirred. As shown in FIG. 4, the screen of the monitor 60, which is the display means at this time, shows the state of excavating the ground, the state of ejecting cement milk M from the ejection hole 26 of the stirring blade 24, and the excavated ground. Image data G that schematically shows the state of concrete work such as mixing and stirring the cement milk M and the state of real-time work by drawing a figure of the ground improvement tool is displayed.

Then, the ground is excavated, and the excavated ground and the cement milk M are mixed and stirred downward. On the screen of the monitor 60, which is the display means at this time, for example, when the depth is 6.2 m and the depth is 11.4 m, as shown in FIGS. 5 and 6, the ground is being excavated and agitated. A concrete work such as ejecting cement milk M from the ejection hole 26 of the wing 24, mixing and stirring the excavated ground and cement milk M, in short, a diagram of the ground improvement tool is drawn. Image data G that schematically represents the state of real-time work is displayed.

After that, when the ground is excavated to a predetermined depth, for example, a depth of 12.8 m, and the excavated ground and the cement milk M are mixed and stirred, the penetration of the stirring shaft 21 and the stirring blade 24 is completed. On the screen of the monitor 60, which is the display means at this time, as shown in FIG. 7, a concrete work state such as a state in which the stirring shaft 21 and the stirring blade 24 have been penetrated, in short, a state of the ground improvement tool. Image data G is displayed in which a figure is drawn and a state of real-time work is schematically represented.

Then, the drawing of the stirring shaft 21 and the stirring blade 24 that have penetrated to a predetermined depth is started. On the screen of the monitor 60, which is the display means at this time, as shown in FIG. 8, a concrete work state such as pulling out the stirring shaft 21 and the stirring blade 24, that is, a figure of the ground improvement tool is drawn. Image data G that schematically represents the state of real-time work is displayed. After that, the penetrating stirring shaft 21 and stirring blade 24 are pulled out to the ground surface. As a result, the work of creating the consolidation improved body T in the ground is completed.

In this way, on the screen of the monitor 60, which is a display means provided in the driver's cab 12 of the construction machine 1, the figure of the ground improvement tool obtained based on the operation status data detected by each detector, which is the detection means. Is drawn and the image data G that schematically shows the state of the work in real time is displayed, so that the state of the work can be intuitively understood. Therefore, not only a skilled operator but also a person other than a skilled operator. For example, even a construction contractor or other construction personnel can easily grasp the state of work from the image data G displayed on the screen of the monitor 60.

Further, the ground improvement device records the image data G displayed on the screen of the monitor 60, which is a display means, or the numerical data Gp for the image in the preprocessing stage of the image data G in the driver's cab 12 of the construction machine 1. Have means. The recording means is a computer used as the processing device unit 50, which is stored and stored here. However, the recording means is not limited to this. The image data G or the numerical data Gp for an image recorded in the recording means can be reproduced and displayed as the image data G on the monitor 60 which is a display means based on these. As a result, after the work is completed, people other than the operator can see the screen of the monitor 60, which is a display means, and confirm what kind of work was actually performed.

Further, the image data G or the numerical data Gp for an image recorded in the recording means can be output to the outside and stored in a storage medium, for example. Examples of the storage medium include optical discs such as CDs and DVDs, and USB memory. As a result, the recorded image data G or numerical data Gp for images can be stored in the storage medium as work management information, and the work management information can be verified at a later date when necessary, and also stored in the storage medium. The work management information can also be used as proof that the work has been performed reliably.

From these facts, in the work of ground improvement, the image data G or the numerical data Gp for images is stored in the storage medium as described above regarding the contents of the work such as what kind of work the operator performed on that day. Is stored as work management information, and by storing this, work can be managed.

FIG. 9 is an explanatory diagram showing a communication means and an external display means in the ground improvement device.
As shown in FIG. 9, the ground improvement device draws a figure of the ground improvement tool displayed by the display means and preprocesses the image data G or the image data G that schematically shows the state of the work in real time. It has a communication means for transmitting numerical data Gp for an image of a stage. Further, it has an external display means for displaying the image data G based on the image data G or the numerical data Gp for an image transmitted via the communication means. As a communication means, it is connected to a monitor 60 or a processing device unit 50 which is a display means provided in the driver's cab 12 of the construction machine 1, receives image data G or numerical data Gp for images from them, and transmits them wirelessly. It is composed of a machine 71 and a receiver 72 that receives image data G or numerical data Gp for images transmitted wirelessly from the transmitter 71. Although the transmitter 71 and the receiver 72 transmit wirelessly, they may be wired instead of wirelessly.

The external display means is a monitor 61 that connects to the receiver 72 of the communication means and displays the image data G based on the image data G or the numerical data Gp for the image received by the receiver 72. This is, for example, a portable personal computer or tablet, a computer provided in the office of the construction site, a computer provided in the head office, a branch office or other related departments of the construction company, and the cab 12 of the construction machine 1. It can be placed in a place other than inside.

In this way, using the communication means, the image data G on which the figure of the ground improvement tool is drawn and the state of the work in real time is schematically represented can be displayed on the screen of the monitor 61 which is the external display means. As a result, even while the ground is being improved, people other than the operator can see the screen of the monitor 61, which is an external display means, at a place other than the cab 12 of the construction machine 1. You can check the state of work.

Further, in the above-described embodiment, the ground improvement device is used for improving the ground by the deep mixing treatment method, but the present invention is not limited to this. Therefore, a ground improvement device used for improving the ground by another construction method will be described. For example, it is a case of a ground improvement device used for improving the ground by a high-pressure injection stirring method.
FIG. 10 is a front view showing the lower end of the ground improvement tool of another ground improvement device.

The ground improvement device is basically composed of a construction machine 1, a ground improvement tool 2, and peripheral equipment 3 as described above.
The ground improving tool 2 is provided with one pipe rod 81 extending vertically along the mast of the construction machine 1, and as shown in FIG. 10, a solidifying material is provided at the lower end of the pipe rod 81. It has an injection hole 82 for injecting cement milk M in the horizontal direction. Further, a plurality of excavation bits 83 for excavating the ground are provided at the lowermost end of the pipe rod 82.

To improve the ground in the ground improvement device, the pipe rod 81 of the ground improvement tool 2 is penetrated to a predetermined depth by a rotating device and an elevating device, and cement, which is a solidifying material, is formed from an injection hole 82 at the lower end of the penetrated pipe rod 81. Milk M is injected horizontally at high speed and high pressure, and the injected cement milk M and the ground are mixed and agitated while cutting the ground with the injection energy, and this is done from below to above to solidify in the ground. The improved body T is created.

Such a ground improvement device also has a detection means for detecting operation status data indicating the operation status of the ground improvement tool 2 when it penetrates into the ground.
Examples of the detecting means include a depth detector that detects the depth of the pipe rod 81 that penetrates into the ground, a speed detector that detects the penetration and withdrawal speed of the pipe rod 81, and a rotation detector that detects the rotation speed of the pipe rod 81. The flow rate detector that detects the amount of cement milk supplied to the tube rod 81, the air flow rate detector that detects the amount of compressed air supplied to the tube rod 81, and the current values of the drive units of the rotating device and the elevating device. It is a current detector that detects and determines the hardness of the ground to be cut.

The operation status data indicating the operation status of the ground improvement tool 2 detected by each detector, which is a detection means, is subjected to arithmetic processing and processing in the processing device unit 50, and a figure of the ground improvement tool based on the operation status data is obtained. Image data G that is drawn and schematically represents the state of real-time work is required.

A specific method of obtaining the image data G in which the figure of the ground improving tool in the processing apparatus unit 50 is drawn and the state of the real-time work is schematically shown will be described.
The state of penetrating and pulling out the pipe rod 81 of the ground improvement tool 2 is obtained from each data detected by the depth detector, the speed detector, and the rotation detector, which are the detection means. In addition, the state of cutting the ground by injecting cement milk at high speed and high pressure, and the state of mixing and stirring the injected cement milk and the ground are the detection means of the flow rate detector, air flow rate detector, and current detector. Obtained from each data detected in and.
In this way, the image data G is obtained by drawing a figure of the ground improvement tool from the data detected by each detector and schematically showing the state of real-time work.

FIG. 11 is an explanatory diagram showing a screen of a monitor which is a display means.
Image data G, in which a figure of the ground improvement tool obtained by arithmetic processing and processing in the processing apparatus unit 50 is drawn and a state of real-time work is schematically shown, is displayed on the monitor 60 which is a display means. To. On the screen of the monitor 60, which is the display means at this time, for example, as shown in FIG. 11, cement milk is injected at high speed and high pressure from the injection hole 82 at the lower end of the pipe rod 81 that has penetrated into the ground to cut the ground. The state of concrete work such as the state of doing, the state of mixing and stirring the injected cement milk and the ground is displayed.

In this way, on the screen of the monitor 60, which is the display means, a figure of the ground improvement tool obtained based on the operation status data detected by each detector, which is the detection means, is drawn to illustrate the state of real-time work. By displaying the image data G represented as a target, it becomes possible to intuitively understand the state of work.

In addition, a ground improvement device used for improving the ground by another construction method will be described. For example, it is the case of the static compaction sand pile method, which is one of the sand compaction pile methods.
The ground improvement device is basically composed of a construction machine 1, a ground improvement tool 2, and peripheral equipment 3 as described above, and the ground improvement tool 2 goes vertically along the mast of the construction machine 1. One casing pipe is provided, and the upper part of the casing pipe has an input port for inserting sand into the casing pipe, and the lower end has an discharge port for discharging sand.

To improve the ground in the ground improvement device, the casing pipe of the ground improvement tool 2 is penetrated to a predetermined depth by a rotating device and an elevating device, and sand is discharged from the discharge port at the lower end while pulling out the penetrating casing pipe upward. After that, the casing pipe is driven back and the discharged sand and the surrounding ground are compacted. By repeating this pulling out and hitting back finely and performing this upward, a sand pile with an expanded diameter is created in the ground.

Such a ground improvement device also has a detection means for detecting operation status data indicating the operation status of the ground improvement tool 2 when it penetrates into the ground.
The detection means include a depth detector that detects the depth of the casing pipe, a speed detector that detects the speed of pulling out and hitting the casing pipe, a rotation detector that detects the number of revolutions of the casing pipe, and sand to be put into the casing pipe. A sand amount detector that detects the amount of water, a current detector that detects the current value of the drive unit of each of the rotating device and the elevating device, and obtains the hardness of the ground.

The operation status data indicating the operation status of the ground improvement tool 2 detected by each detector, which is a detection means, is subjected to arithmetic processing and processing in the processing device unit 50, and a figure of the ground improvement tool based on the operation status data is obtained. Image data G that is drawn and schematically represents the state of real-time work is required.

A specific method of obtaining the image data G in which the figure of the ground improving tool in the processing apparatus unit 50 is drawn and the state of the real-time work is schematically shown will be described.
The appearance of pulling out the casing pipe of the ground improvement tool 2 upward, the appearance of pushing back the casing pipe, and the appearance of compacting the sand and the surrounding ground with the casing pipe are the depth detector and speed as detection means. Obtained from each data detected by the detector, rotation detector, and current detector. Further, the state of discharging sand from the discharge port at the lower end of the casing pipe is obtained from the data detected by the sand amount detector which is the detection means.
In this way, the image data G is obtained by drawing a figure of the ground improvement tool from the data detected by each detector and schematically showing the state of real-time work.

FIG. 12 is an explanatory diagram showing a screen of a monitor which is a display means.
Image data G, in which a figure of the ground improvement tool obtained by arithmetic processing and processing in the processing apparatus unit 50 is drawn and a state of real-time work is schematically shown, is displayed on the monitor 60 which is a display means. To. On the screen of the monitor 60, which is the display means at this time, for example, as shown in FIG. 12, sand is discharged from the discharge port at the lower end while the casing pipe is pulled upward, and the casing pipe is pushed back and discharged. The state of concrete work such as the state of compacting the sand and the surrounding ground is displayed.

In this way, on the screen of the monitor 60, which is the display means, a figure of the ground improvement tool obtained based on the operation status data detected by each detector, which is the detection means, is drawn to illustrate the state of real-time work. By displaying the image data G represented as a target, it becomes possible to intuitively understand the state of work.

The ground improvement method for improving the ground is not limited to the above-mentioned method, but may be another sand compaction pile method such as a backlash type sand compaction pile method.

Even in the case of the ground improvement device used for ground improvement by the sand compaction pile method such as the backlash type sand compaction pile method, the operation detected by each detector which is the detection means is displayed on the screen of the monitor 60 which is the display means. By drawing the figure of the ground improvement tool obtained based on the situation data and displaying the image data G that schematically shows the state of the work in real time, the state of the work can be intuitively understood. It has become like.

1 ... construction machine, 2 ... ground improvement tool, 3 ... peripheral equipment, 11 ... traveling body, 12 ... cab, 13 ... mast, 21 ... stirring shaft, 22 ... rotating device, 23 ... lifting device, 24 ... stirring blade, 25 ... connecting arm, 26 ... ejection hole, 27 ... drilling bit, 31 ... compressor, 32 ... air flow detector, 33 ... cement production plant, 34 ... cement silo, 35 ... water tank, 36 ... grout pump, 37a ... flow detection Device, 37b ... Flow detector, 41 ... Depth detector, 42 ... Speed detector, 43 ... Rotation detector, 44 ... Current detector, 50 ... Processing device, 60 ... Monitor, 61 ... Monitor, 71 ... Transmitter , 72 ... receiver, 81 ... pipe rod, 82 ... injection hole, 83 ... excavation bit, 91 ... construction machine, 92 ... ground improvement tool, 93 ... mast, 94 ... stirring shaft, 95 ... stirring blade.

Claims (3)

It is a ground improvement device that improves the ground by the sand compaction pile method, which penetrates the casing pipe of the ground improvement tool attached to the construction machine into the ground, discharges sand into the ground, and compacts the discharged sand and the surrounding ground. There,
It has a detection means for detecting the operation status data indicating the operation status of the ground improvement tool when it penetrates into the ground, and the detection means is a depth detector for detecting the depth of the casing pipe, pulling out and hitting the casing pipe. A speed detector that detects the speed, a rotation detector that detects the number of rotations of the casing pipe, a sand amount detector that detects the amount of sand put into the casing pipe, and a current value of the drive unit of each of the rotating device and the elevating device. It is a current detector that finds the hardness of the ground, and
It has a display means for displaying image data schematically showing the state of real-time work by drawing a figure of the ground improvement tool obtained based on the operation status data detected by the detection means, and the display means is the ground. Along with the figure of the casing pipe of the improvement tool, the casing pipe obtained based on the operation status data detected by the detection means is pulled out upward, the sand is discharged, and the sand discharged by hitting the casing pipe back. A ground improvement device that displays the state of compaction of the surrounding ground. In the ground improvement apparatus according to claim 1,
It has a recording means for recording the image data displayed by the display means or the numerical data for the image in the preprocessing stage of the image data, and the image data is stored in the display means based on the image data recorded in the recording means or the numerical data for the image. A ground improvement device characterized in that the image can be displayed or output to the outside. In the ground improvement apparatus according to claim 1 or 2.
It has a communication means for transmitting image data displayed by the display means or numerical data for an image in a preprocessing stage of the image data.
A ground improvement device comprising an external display means for displaying image data based on image data transmitted via a communication means or numerical data for an image.

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