Ground improvement systems and construction equipment

Abstract

A ground improvement system is provided that can supply power to an agitator shaft in real time during ground improvement work and appropriately control a drive device. [Solution] The ground improvement system 10 is a ground improvement system that drives a construction device 30 under control of a construction machine main body 20 to construct solidification piles. The construction device 30 includes an agitator shaft 33 that penetrates the ground and discharges a solidification material, and a rotating motor 32 that is provided on the side of the agitator shaft 33 and controls the rotation of the agitator shaft 33. The construction device 30 also includes a wireless power transmitting unit 230 and a wireless power receiving unit 330 that is provided vertically above the agitator shaft 33 and receives power wirelessly transmitted from the wireless power transmitting unit 230. The construction device 30 also includes a first battery 320 that stores the power received by the wireless power receiving unit 330, and a first communication control unit 310 that controls a drive device 340 and a sensor 350 that are driven based on the power stored in the first battery 320.

Description

[Technical Field]

[0001] The present invention relates to a ground improvement system and a construction device. [Background technology]

[0002] In a conventional method for improving ground by using a ground improvement machine to mix an improvement material with soft clayey soil in the ground, a technology has been proposed that transmits and receives construction data and control information wirelessly to achieve efficient construction. Patent Document 1 discloses a ground improvement machine equipped with a wireless transceiver on the agitator shaft. The ground improvement machine disclosed in Patent Document 1 wirelessly acquires data obtained from a sensor at the tip of the agitator shaft and sends control signals, such as those for operating a solenoid valve, to the wireless transceiver on the agitator shaft, thereby achieving efficient ground improvement construction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-137619 Summary of the Invention [Problem to be solved by the invention]

[0004] In the ground improvement construction machine disclosed in Patent Document 1, the driving devices such as the wireless transceiver and solenoid valves provided on the agitator shaft, the sensors, etc. require power to operate. Therefore, in the ground improvement construction machine disclosed in Patent Document 1, communication with the wireless transceiver, drive control, and data acquisition from the sensors are performed when the agitator shaft is stopped. Therefore, there is a demand for a system that can communicate with the wireless transceiver, drive control, and data acquisition from the sensors even when the agitator shaft is operating.

[0005] The present invention has been made in consideration of the problems inherent in the conventional technology, and an object of the present invention is to provide a ground improvement system that can supply power to the agitator shaft in real time during ground improvement work and appropriately control the drive device. [Means for solving the problem]

[0006] A ground improvement system according to an embodiment of the present invention is a method for improving the ground by creating solidification piles by discharging solidification material into the ground, and the system drives a construction device under control from the construction machine body to create solidification piles.The construction device comprises: an agitator shaft that penetrates the ground and discharges solidification material; a rotating mechanism provided on the side of the agitator shaft to control the rotation of the agitator shaft; an elevator that controls the raising and lowering of the agitator shaft; a wireless power transmission unit; a wireless power receiving unit provided vertically above the agitator shaft to receive power wirelessly transmitted from the wireless power transmission unit; a first battery that stores the power received by the wireless power receiving unit; and a first communication control unit that controls the drive device and sensor that are operated based on the power stored in the first battery.The construction machine body comprises: a second communication control unit that sends a control signal to the first communication control unit of the construction device based on user input; a control panel that controls the elevator and rotating mechanism provided on the construction device based on user operation instructions; and a second battery that transmits power to the wireless power transmission unit.

[0007] Another aspect of the construction device of the present invention is a construction device that is driven by control from the construction machine body and creates solidification piles in a method of improving the ground by discharging solidification material into the ground, and is equipped with an agitator shaft that penetrates the ground and discharges solidification material, a rotating motor provided on the side of the agitator shaft that controls the rotation of the agitator shaft, an elevator that controls the elevation of the agitator shaft, a wireless power transmitting unit that wirelessly transmits power sent from the construction machine body or a power source, a wireless power receiving unit provided vertically above the agitator shaft and receives power wirelessly transmitted from the wireless power transmitting unit, a first battery that stores the power received by the wireless power receiving unit, and a first communication control unit that controls a drive device and sensor that operate based on the power stored in the first battery. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a ground improvement system that can supply power to the agitator shaft in real time during ground improvement work and appropriately control the drive device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 10 is a diagram for explaining the ground improvement method in the ground improvement system according to this embodiment. [Figure 2] FIG. 1 is a diagram for explaining a ground improvement method. [Figure 3] FIG. 2 is a schematic diagram for explaining the stirring shaft of the ground improvement system according to this embodiment. [Figure 4] FIG. 2 is a schematic diagram for explaining the stirring shaft of the ground improvement system according to this embodiment. [Figure 5] FIG. 1 is a block diagram showing the configuration of a ground improvement system according to this embodiment. [Figure 6] FIG. 2 is a schematic diagram for explaining wireless power supply in the ground improvement system according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The ground improvement system 10 according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions.

[0011] (Ground improvement method) 1 is a diagram for explaining a ground improvement method in a ground improvement system 10 according to this embodiment. The method to which the ground improvement system 10 is applied in this embodiment is a biaxial type method in which the ground 50 is mixed and improved using compressed air, a slurry improvement material (solidification material), and a purification material (for example, iron powder, a microbial activator, etc.). Note that the method to which the ground improvement system 10 is applied in this embodiment is not limited to the biaxial type, and may also be a uniaxial type.

[0012] The ground improvement system 10 comprises a construction machine body 20 and a construction device 30. Specifically, the ground improvement system 10 drives the construction device 30 under control from the construction machine body 20 based on operation instructions from a user, etc., to carry out ground improvement. In this specification, in the example shown in Fig. 1, the part where a user sits and controls the construction and the part including the reader 22 will be described as the construction machine body 20. Similarly, in this specification, the device including the stirring shaft 33 that penetrates into the ground will be described as the construction device 30.

[0013] The construction machine body 20 is provided with a leader 22 at the front. The leader 22 supports two stirring shafts 33 via an elevator 31 and a rotating motor 32 with a swivel mechanism, and performs rotation and elevation movement.

[0014] The construction machine body 20 of the ground improvement system 10 includes a wireless system operation panel 100, an operation panel 200, a wireless communication system (second communication control unit 110), a control panel 210, and a second battery 220. Details of the wireless system operation panel 100, the operation panel 200, the wireless communication system (second communication control unit 110), the control panel 210, and the second battery 220 will be described later.

[0015] The underground and aboveground data are displayed via the instrument panel (monitor, display device, etc.) of the control unit located in the driver's seat of the construction machine main body 20, and the agitator shaft 33 can be operated using the operating unit in the driver's seat based on this data.

[0016] The stirring shaft 33 is supported by a vibration prevention portion 35 provided on the underside of the leader 22 so as to be movable up and down in the vertical direction along the guide portion 22a of the leader 22.

[0017] A rotating shaft 34 equipped with a plurality of stirring blades 37 and a drilling bit 36 ​​is connected to the lower end (tip) of the stirring shaft 33. A blade (not shown) is attached between the lower portions of each stirring shaft 33 to control the tilt angle so that the stirring shaft 33 descends vertically. A pair of anti-co-rotation plates (not shown) are attached between each of the rotating shafts 34.

[0018] The elevator 31 has an elevator motor and a power transmission means for transmitting the rotational force of the elevator motor to the agitation shaft 33, and raises and lowers the agitation shaft 33 in the ground. In other words, the elevator 31 controls the raising and lowering of the agitation shaft 33. The elevator 31 is also provided with a hydraulic sensor (not shown) that detects the hydraulic pressure when the agitation shaft 33 is raised and lowered. The elevator 31 is also provided with a depth gauge (not shown) that detects the depth of the bottom end of the agitation shaft 33.

[0019] Rotating motor 32 is a mechanism equipped with a rotation motor and for rotating agitation shaft 33 in any direction. Specifically, rotating motor 32 is provided on the side of agitation shaft 33 and controls the rotation of agitation shaft 33. Rotating motor 32 is also provided with a current sensor (not shown) that detects the current value of the rotation motor.

[0020] The ground improvement system 10 penetrates the stirring shaft 33 into the ground to a predetermined depth using the elevator 31 and the rotating machine 32. The construction device 30 may also be equipped with a device (speedometer) that measures the penetration speed when the stirring shaft 33 is penetrated into the ground.

[0021] Figure 2 is a diagram for explaining the construction method according to this embodiment. In step A in Figure 2, the agitator shaft 33 is placed and positioned at a predetermined position, and the construction device 30 is set at the predetermined position. In step B, the solidification material is continuously penetrated while being discharged by penetration agitation. In steps C to E, after it is confirmed that the tip has reached the supporting layer (contact with the bottom is confirmed), the discharge of the solidification material is stopped and the tip is treated. In step F, the agitator blades 37 of the agitator shaft 33 are pulled out while rotating in the reverse direction. In step F, an improved body is created up to the ground surface, and the construction device is moved to the next construction position.

[0022] Fig. 3 is a schematic diagram for explaining the agitation shaft 33 of the ground improvement system 10 according to this embodiment. As shown in Fig. 3, an air supply pipe 33b for supplying compressed air and an improvement material supply pipe 33a for supplying a slurry improvement material such as cement milk are provided inside the agitation shaft 33. The slurry improvement material corresponds to a solidification material.

[0023] A first communication control unit 310 and a wireless power receiving unit 330 are provided above the agitation shaft 33 in the vertical direction. Furthermore, above the wireless power receiving unit 330, a wireless power transmitting unit 230 is provided opposite the wireless power receiving unit 330.

[0024] Also, electromagnetic valves (drive devices 340) for controlling the opening and closing of the improvement material supply pipe 33a and the air supply pipe 33b are provided below the agitation shaft 33 in the vertical direction. Furthermore, a camera 350a for capturing images of the construction status and an inclinometer 350b are provided below the agitation shaft 33. The camera 350a and the inclinometer 350b correspond to the sensor 350.

[0025] Fig. 4 is a schematic diagram showing details of the lower part of the agitation shaft 33. As shown in Fig. 4, the camera 350a and the inclinometer 350b are connected to a control line 310a. This control line 310a is connected to a first communication control unit 310, and control signals and sensor data are transmitted and received between the first communication control unit 310 and the camera 350a and the inclinometer 350b.

[0026] According to the ground improvement system 10 of this embodiment, the supply amount of compressed air and slurry improvement material can be controlled by opening and closing the solenoid valve (drive device 340), and the solidification piles 51 (see FIG. 1) can be constructed with an appropriate amount of compressed air and slurry improvement material. In addition, more appropriate ground improvement work can be performed based on the data acquired by the camera 350a and the inclinometer 350b.

[0027] The sensor 350 is not limited to the camera 350a and the inclinometer 350b, but may also be a pH meter, a thermometer, a pressure gauge, a pore water pressure gauge, a soil pressure gauge, an underground radar, a non-contact displacement sensor (eddy current type, optical type, ultrasonic type), a contact displacement sensor, a capacitance sensor, etc.

[0028] As described above, the agitator shaft 33 is mechanically connected to the rotating machine 32 and penetrates into the ground while rotating due to the force transmitted from the elevator 31 and the rotating machine 32. Therefore, in conventional ground improvement systems, the rotation of the agitator shaft, which is a rotating body, must be stopped in order to send power and control signals to the agitator shaft. Furthermore, in configurations in which measuring devices such as sensors are attached to the agitator shaft 33, the rotation of the agitator shaft 33, which is a rotating body, must also be stopped when checking acquired data. Therefore, in conventional configurations, it is difficult to collect data in real time from the agitator shaft 33, control the drive device attached to the agitator shaft 33, and supply power during ground improvement work.

[0029] The ground improvement system 10 of this embodiment makes it possible to supply power to the agitator shaft 33 and appropriately control the drive unit 340 even when the agitator shaft 33 is rotating in the above-mentioned ground improvement method.

[0030] (Configuration of Ground Improvement System 10) Next, we will explain the details of this ground improvement system 10. Figure 5 is a block diagram that schematically shows the configuration of the ground improvement system 10 according to this embodiment. The ground improvement system 10 includes a construction machine main body 20 and a construction device 30.

[0031] (Configuration of construction machine body 20) As shown in Fig. 5, the construction machine main body 20 is configured to include a wireless system operation panel 100 and an operation panel 200. The wireless system operation panel 100 is configured, for example, by a touch panel or a switch box, and transmits and receives data to and from the construction device 30 via a wireless communication system (second communication control unit 110). The second communication control unit 110 corresponds to the wireless communication system shown in Fig. 5.

[0032] The wireless system operation panel 100 acquires information input by user operation, which is information related to the control of the construction device 30. The user corresponds to the operator of the construction machine main body 20, which is the ground improvement system 10. The information input by the user is sent to the construction device 30 via the second communication control unit 110.

[0033] Furthermore, the user may obtain information acquired by the sensor 350 provided in the construction device 30 via the second communication control unit 110. In this case, the information acquired via the second communication control unit 110 may be configured to be displayed on the wireless system operation panel 100 so that the user can obtain the information. Alternatively, the information acquired via the second communication control unit 110 may be configured to be acquired via a display device (not shown) such as a display connected to the second communication control unit 110.

[0034] The operation panel 200 is connected to a control panel 210 that controls the elevator 31 and the rotating machine 32. The control panel 210 sends information input by user operation, which is used to control the elevator 31 and the rotating machine 32 that are provided on the upper and side portions of the stirring shaft 33 of the processing device 30, to the elevator 31 and the rotating machine 32 as control signals. In addition, the second battery 220 is a device for storing power to be supplied to the processing device 30.

[0035] (Configuration of construction device 30) 5, the processing device 30 includes an elevator 31, a rotating machine 32, and an agitation shaft 33. In this embodiment, the processing device 30 includes a wireless power transmission unit 230.

[0036] The agitation shaft 33 is equipped with a construction control unit 300. The construction control unit 300 includes a first communication control unit 310, a first battery 320, a wireless power receiving unit 330, a drive unit 340, and a sensor 350. The sensor 350 corresponds to the above-mentioned camera 350a, inclinometer 350b, oil pressure sensor, depth gauge, current sensor, and / or speedometer. The first communication control unit 310 corresponds to the wireless control unit provided in the construction control unit 300 in FIG. 5.

[0037] The first communication control unit 310 of the construction control unit 300 transmits and receives data via wireless communication with the second communication control unit 110. Specifically, the first communication control unit 310 of the construction control unit 300 drives the drive device 340 in response to a control instruction from the second communication control unit 110. The first communication control unit 310 of the construction control unit 300 also transmits data acquired by the sensor 350 to the second communication control unit 110. In other words, the first communication control unit 310 and the second communication control unit 110 can communicate with each other via wireless communication, and data is transmitted and received in both directions.

[0038] The first battery 320 is a battery that stores power received by wireless power supply from the construction machine body 20 via the wireless power transmitting unit 230 and the wireless power receiving unit 330. Based on the power stored in this first battery 320, the first communication control unit 310, the drive device 340, and the sensor 350 are driven.

[0039] Figure 6 is a diagram for explaining wireless power supply in the ground improvement system 10 of this embodiment, and is a schematic side view of the stirring shaft 33, the wireless power transmitting unit 230, and a portion of the wireless power receiving unit 330 as viewed from the side.

[0040] 6, the agitation shaft 33 is connected to the wireless power receiving unit 330 at its upper vertical position and receives power received by the wireless power receiving unit 330. The wireless power transmitting unit 230 is provided above the wireless power receiving unit 330 and at a predetermined distance from the wireless power receiving unit 330. For example, the predetermined distance may be 20 mm. Note that in this embodiment, the predetermined distance is not limited to 20 mm, and may be shorter or longer than 20 mm.

[0041] 6, the wireless power transmitting unit 230 and the wireless power receiving unit 330 are always opposed to each other, and wireless power transmission (wireless power feeding) is carried out from the wireless power transmitting unit 230 to the wireless power receiving unit 330. Therefore, power is fed to the agitation shaft 33 at a predetermined timing both when the agitation shaft 33, which is a rotating body, is rotating and when it is stationary.

[0042] That is, the ground improvement system 10 according to this embodiment can supply power to the first battery 320 of the construction control unit 300 provided on the agitation shaft 33 without stopping the rotation of the agitation shaft 33, which is a rotating body. Furthermore, since power is supplied to the ground improvement system 10 even when the agitation shaft 33 is in operation, it is possible to control (drive) the drive device 340, such as an electromagnetic valve, provided on the agitation shaft 33 in real time, and to collect data from the sensors 350, such as a camera 350a and an inclinometer 350b. That is, in the ground improvement system 10 according to this embodiment, the drive device 340 and the sensor 350 can be driven when the agitation shaft 33 is rotating.

[0043] The wireless power supply (wireless power transmission) method according to this embodiment applies a high-frequency electromagnetic coupling method using a general electromagnetic induction. Wireless power supply methods include a high-frequency electromagnetic coupling method using electromagnetic induction, a magnetic resonance method, an electric field coupling method, and a microwave wireless method. By applying the high-frequency electromagnetic coupling method as the wireless power supply method according to this embodiment, it is possible to realize wireless power supply with superior environmental resistance to noise, dirt, etc., and high power supply efficiency compared to other methods.

[0044] As described above, the ground improvement system 10 according to this embodiment is a ground improvement system 10 that drives the construction device 30 under control of the construction machine main body 20 to construct the solidification piles 51 in a construction method for improving the ground 50 by discharging a solidification material into the ground to create solidification piles 51. The construction device 30 includes an agitation shaft 33 that penetrates the ground and discharges the solidification material, a rotating motor 32 that is provided on the side of the agitation shaft 33 and controls the rotation of the agitation shaft 33, and an elevator 31 that controls the elevation of the agitation shaft 33. The construction device 30 also includes a wireless power transmitting unit 230 and a wireless power receiving unit 330 that is provided vertically above the agitation shaft 33 and receives power wirelessly transmitted from the wireless power transmitting unit 230. The construction device 30 also includes a first battery 320 that stores power received by the wireless power receiving unit 330, and a first communication control unit 310 that controls a drive device 340 and a sensor 350 that are driven based on the power stored in the first battery 320. The construction machine main body 20 also includes a second communication control unit 110 that sends a control signal to the first communication control unit 310 of the construction device 30 based on a user's input. The construction machine main body 20 also includes a control panel 210 that controls the elevator 31 and the rotary machine 32 provided on the construction device 30 based on a user's operation instruction, and a second battery 220 that transmits power to the wireless power transmitting unit 230.

[0045] As a result, the ground improvement system 10 according to this embodiment can supply power to the agitation shaft 33 and appropriately control the drive device 340 even when the agitation shaft 33 is being driven.

[0046] The wireless power receiving unit 330 may be provided above the wireless power receiving unit 330 and at a predetermined distance from the wireless power receiving unit 330. This allows the ground improvement system 10 according to this embodiment to supply power to the agitation shaft 33 both when the agitation shaft 33 is driven and when it is stationary. In other words, the ground improvement system 10 can supply power to the first battery 320 of the construction control unit 300 provided on the agitation shaft 33 without stopping the rotation of the agitation shaft 33, which is a rotating body.

[0047] The first communication control unit 310 and the second communication control unit 110 may be able to communicate with each other via wireless communication. This allows the ground improvement system 10 according to this embodiment to drive the drive device 340 even when the agitation shaft 33 is rotating. Furthermore, the ground improvement system 10 can recognize information acquired by the sensor 350 via the first communication control unit 310 and the second communication control unit 110 even when the agitation shaft 33 is rotating.

[0048] Power may be supplied by the wireless power transmitting unit 230 and the wireless power receiving unit 330 using a high-frequency electromagnetic coupling power supply system. As a result, the ground improvement system 10 according to this embodiment employs the high-frequency electromagnetic coupling system, which makes it possible to realize wireless power supply with excellent environmental resistance to noise, dirt, etc., and high power supply efficiency compared to other systems.

[0049] (Other embodiments) Although the embodiments have been described in detail with reference to the drawings, the present embodiments are not limited to the contents described in the above embodiments. Furthermore, the components described above include those that can be easily imagined by a person skilled in the art and those that are substantially the same. Furthermore, the configurations described above can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the configurations can be made without departing from the spirit of the embodiments.

[0050] For example, in the above-described embodiment, a configuration has been shown in which power stored in the second battery 220 provided in the construction machine body 20 is transmitted to the wireless power transmission unit 230 of the construction device 30, but this configuration does not limit the configuration of the embodiment. For example, if a power source is provided near the ground improvement system 10, the power source and the wireless power transmission unit 230 of the construction device 30 may be connected by a power line, and power may be transmitted directly from the power source to the wireless power transmission unit 230 of the construction device 30. In this configuration, there is no need to provide the second battery 220 in the construction machine body 20, and it is possible to reduce the number of steps, such as charging the second battery 220.

[0051] (Actions, effects, etc.) The effects of this embodiment will be described below.

[0052] (1) A ground improvement system 10 according to a first aspect of this embodiment is a ground improvement system 10 that drives a construction device 30 under control of a construction machine main body 20 to construct solidification piles 51 in a construction method for improving ground 50 by discharging a solidification material into the ground to create solidification piles 51. The construction device 30 includes an agitation shaft 33 that penetrates the ground and discharges the solidification material, a rotating motor 32 that is provided on the side of the agitation shaft 33 and controls the rotation of the agitation shaft 33, and an elevator 31 that controls the elevation of the agitation shaft 33. The construction device 30 also includes a wireless power transmitting unit 230 and a wireless power receiving unit 330 that is provided vertically above the agitation shaft 33 and receives power wirelessly transmitted from the wireless power transmitting unit 230. The construction device 30 also includes a first battery 320 that stores power received by the wireless power receiving unit 330, and a first communication control unit 310 that controls a drive device 340 and a sensor 350 that are driven based on the power stored in the first battery 320. The construction machine main body 20 also includes a second communication control unit 110 that sends a control signal to the first communication control unit 310 of the construction device 30 based on a user's input. The construction machine main body 20 also includes a control panel 210 that controls the elevator 31 and the rotary machine 32 provided on the construction device 30 based on a user's operation instruction, and a second battery 220 that transmits power to the wireless power transmitting unit 230.

[0053] With this configuration, the ground improvement system 10 can supply power to the agitation shaft 33 and appropriately control the drive device 340 even when the agitation shaft 33 is being driven.

[0054] (2) The wireless power receiving unit 330 of the ground improvement system 10 relating to the second aspect of this embodiment may be provided above the wireless power receiving unit 330 and at a predetermined distance from the wireless power receiving unit 330.

[0055] This configuration enables the ground improvement system 10 to supply power to the agitation shaft 33 both when the agitation shaft 33 is driven and when it is stationary. In other words, the ground improvement system 10 can supply power to the first battery 320 of the construction control unit 300 provided on the agitation shaft 33 without stopping the rotation of the agitation shaft 33, which is a rotating body.

[0056] (3) The first communication control unit 310 and the second communication control unit 110 of the soil improvement system 10 according to the third aspect of this embodiment may be capable of communicating with each other via wireless communication.

[0057] This configuration enables the ground improvement system 10 to drive the drive device 340 even when the agitation shaft 33 is rotating. Also, the ground improvement system 10 can recognize the information acquired by the sensor 350 via the first communication control unit 310 and the second communication control unit 110 even when the agitation shaft 33 is rotating.

[0058] (4) Power supply by the wireless power transmitting unit 230 and the wireless power receiving unit 330 of the ground improvement system 10 according to the fourth aspect of this embodiment may be implemented by a high-frequency electromagnetic coupling type power supply method.

[0059] With this configuration, the ground improvement system 10 applies a high-frequency electromagnetic coupling method, which makes it possible to achieve wireless power supply with high power supply efficiency and superior environmental resistance to noise and dirt compared to other methods.

[0060] (5) The construction device 30 according to the fifth aspect of the present embodiment includes a stirring shaft 33 that penetrates into the ground and discharges a solidifying material, a turning machine 32 provided on the side portion of the stirring shaft 33 for controlling the rotation of the stirring shaft 33, and a lifting machine 31 for controlling the lifting and lowering of the stirring shaft 33. Further, the construction device 30 includes a wireless power transmission unit 230 that wirelessly transmits the power sent from the construction machine main body 20 or a power source, and a wireless power reception unit 330 provided at the upper part in the vertical direction of the stirring shaft 33 for receiving the power wirelessly power-transmitted from the wireless power transmission unit 230. Further, the construction device 30 includes a first battery 320 for storing the power received by the wireless power reception unit 330, and a first communication control unit 310 for controlling a drive device 340 and a sensor 350 that are driven based on the power stored in the first battery 320.

[0061] With this configuration, even when the stirring shaft 33 is driven, the construction device 30 can supply power to the stirring shaft 33 and appropriately control the drive device 340.

Explanation of Signs

[0062] 10 Ground improvement system 20 Construction machine main body 30 Construction device 31 Lifting machine 32 Turning machine 33 Stirring shaft 34 Rotating shaft 100 Wireless system operation panel 110 Second communication control unit 200 Operation panel 210 Control panel 220 Second battery 230 Wireless power transmission unit 300 Construction control unit 310 First communication control unit 320 First battery 330 Wireless power reception unit 340 Drive device 350 Sensor

Claims

1. In a construction method for improving the ground by discharging a solidification material into the ground to create solidification piles, a construction device is driven by control from a construction machine body, and the solidification piles are created. The construction device is an agitation shaft that penetrates into the ground and discharges the solidification material; a rotating mechanism provided on a side of the agitation shaft and controlling rotation of the agitation shaft; an elevator that controls the elevation of the stirring shaft; a wireless power transmission unit; a wireless power receiving unit provided above the stirring shaft in the vertical direction and configured to receive power wirelessly transmitted from the wireless power transmitting unit; a first battery that stores the power received by the wireless power receiving unit; a first communication control unit that controls a drive device and a sensor that are driven based on the power stored in the first battery, The construction machine body is A second communication control unit that sends a control signal to the first communication control unit of the construction device in response to a user input; a control panel that controls the elevator and the rotary machine provided in the construction device in response to an operation instruction from the user; a second battery that transmits power to the wireless power transmitting unit, Ground improvement system.

2. The ground improvement system according to claim 1 , wherein the wireless power transmitting unit is provided above the wireless power receiving unit and at a predetermined distance from the wireless power receiving unit.

3. The ground improvement system according to claim 1 , wherein the first communication control unit and the second communication control unit are capable of communicating with each other via wireless communication.

4. The ground improvement system according to any one of claims 1 to 3, wherein power supply by the wireless power transmitting unit and the wireless power receiving unit is carried out by a high-frequency electromagnetic coupling power supply method.

5. In a construction method for improving the ground by discharging a solidification material into the ground to create a solidification pile, a construction device for creating the solidification pile is driven by control from a construction machine body, an agitation shaft that penetrates into the ground and discharges the solidification material; a rotating mechanism provided on a side of the agitation shaft and controlling rotation of the agitation shaft; an elevator that controls the elevation of the stirring shaft; a wireless power transmission unit that wirelessly transmits power sent from the construction machine body or a power source; a wireless power receiving unit provided above the stirring shaft in the vertical direction and configured to receive power wirelessly transmitted from the wireless power transmitting unit; a first battery that stores the power received by the wireless power receiving unit; a first communication control unit that controls a drive device and a sensor that are driven based on the power stored in the first battery.

Images