JP7389712B2 - Filling detection device and filling detection system - Google Patents

Description

The present invention relates to a filling detection device and a filling detection system.

At construction sites, sensors detect the filling status of concrete in excavated holes during concrete pouring. For example, in Patent Document 1, an optical fiber sensor is installed in an underground hole filled with a stabilizing liquid while maintaining a predetermined distance from the hole wall, and the temperature of the stabilizing liquid in contact with the optical fiber sensor is set to an initial temperature. After placing the concrete, the optical fiber sensor detects the amount of expansion and contraction after the concrete is placed with respect to the point at which the initial temperature was set, and the temperature change from the initial temperature is measured based on the amount of expansion and contraction. Discloses a concrete filling confirmation method that determines that concrete has come into contact with an optical fiber sensor at a measurement position of an optical fiber sensor where a temperature increase is confirmed based on temperature changes measured at at least one location on the sensor. has been done.

JP 2019-15084 Publication

However, with the above technology, it is necessary to lay the cord from inside the excavation hole to an external output device, etc., and there is a problem that the cord obstructs a series of casting operations such as installing the tremie pipe and pulling out the casing. Ta.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a filling detection device that does not easily interfere with the pouring work.

In order to solve the above problems, the invention according to claim 1 provides an acquisition means for acquiring data from a sensor for detecting the height of concrete filled in an excavation hole, and an acquisition means for acquiring data from a sensor for detecting the height of concrete filled in an excavation hole. an antenna means for wirelessly transmitting sensor information regarding the concrete filled in the excavation hole, and a fixing means for fixing the apparatus main body in the excavation hole , the fixing means being The reinforcing bar cage installed in the rebar cage is characterized by having a pipe inserted into the main reinforcing bar of the reinforcing bar extending in the excavation direction of the excavation hole from the tip of the main reinforcing bar.

Further, the invention according to claim 2 is the filling detection device according to claim 1 , wherein a hanging part for hanging a wire is attached to the upper part of the main body of the filling detection device. Device.

Further, the invention according to claim 3 is characterized in that, in the filling detection device according to claim 1 or 2 , the sensor is installed at a plurality of depth positions in the excavation direction of the excavation hole. shall be.

Further, the invention according to claim 4 provides a filling detection system comprising a filling detection device that detects the height of concrete filled in an excavation hole, and a recording device that records data on the height of the concrete. In this, the filling detection device includes an acquisition means for acquiring data from a sensor for detecting the height of the concrete filled in the excavation hole, and an acquisition means for acquiring data from a sensor for detecting the height of the concrete filled in the excavation hole, and an antenna means for wirelessly transmitting sensor information regarding the concrete being placed in the excavation hole; and a fixing means for fixing the device main body in the excavation hole; The present invention is characterized in that it has a pipe inserted into the main reinforcing bar of the reinforcing bar cage extending in the excavation direction of the excavation hole from the tip of the main reinforcing bar.

Furthermore, the invention according to claim 5 is characterized in that the filling detection system according to claim 4 further includes a relay device that relays radio waves from the filling detection device to the recording device.

According to the present invention, sensor information regarding the concrete filled in the borehole based on data from a sensor for detecting the height of the concrete filled in the borehole is transmitted to the concrete fixed in the borehole. By wirelessly transmitting data from the main body of the device, there is no need to lay multiple cables from the excavation hole to the outside, so it is possible to provide a filling detection device that does not easily interfere with the pouring work.

FIG. 1 is a schematic diagram showing an example of a schematic configuration of a filling detection system according to the present embodiment. FIG. 2 is a schematic diagram showing an example of a schematic configuration of the filling detection device of FIG. 1. FIG. FIG. 2 is a block diagram showing an example of a schematic configuration of the filling detection device of FIG. 1. FIG. FIG. 2 is a sectional view showing an example of the reinforcing bar cage shown in FIG. 1. FIG. FIG. 2 is a block diagram showing an example of a schematic configuration of the recording device shown in FIG. 1. FIG. FIG. 3 is a schematic diagram showing an example of concrete filling in the filling detection system. 3 is a flowchart illustrating an example of the operation of the filling detection system according to the embodiment.

Embodiments of the present invention will be described below with reference to the drawings. The embodiments described below are embodiments in which the present invention is applied to a filling detection system and the like.

[1. Configuration and function overview of filling detection system and each device]
(1.1 Configuration and functional overview of filling detection system)

First, the configuration and general functions of a filling detection system according to an embodiment of the present invention will be explained using FIG. 1.

FIG. 1 is a schematic diagram showing an example of a schematic configuration of a filling detection system according to this embodiment.

As shown in FIG. 1, the filling detection system 1 according to the present embodiment includes a full-circle rotating machine M that pushes the casing tube Ct into the ground while rotating it, and detects the height of concrete placed inside the casing tube Ct. A relay device 20 that relays radio waves from the filling detection device 10, and a recording device 30 that receives radio waves from the relay device 20 and records data.

The first tube of the casing tube Ct is erected from the ground G by the all-round rotary machine M, and the earth is excavated and removed. Furthermore, adding a casing tube Ct, excavating, and removing earth are repeated to form an excavated hole P of a predetermined depth. Note that water may be injected into the excavated hole P before excavation is performed. Moreover, the excavated hole P may be formed without using the casing tube Ct.

The reinforcing bar cage 40 is inserted into the excavated hole P in the casing tube Ct using a crawler crane or the like, and the reinforcing bar cage 40 is installed.

The reinforcing bar cage 40 includes main reinforcing bars 41 and band reinforcing bars 42. The tip of the main reinforcing bar 41 is approximately the same as the height hc of concrete.

(1.2 Configuration and functions of filling detection device 10)
Next, the configuration and functions of the filling detection device 10 will be explained using the drawings.

FIG. 2 is a schematic diagram showing an example of a schematic configuration of a filling detection device. FIG. 3 is a block diagram showing an example of a schematic configuration of the filling detection device. FIG. 4 is a sectional view showing an example of a reinforcing bar cage.

As shown in FIG. 2, the filling detection device 10 includes a filling detection device main body 10B, an antenna section 10a, a hanging section 10b, and a pipe connection section 10c.

The filling detection device main body 10B is, for example, a cage frame made of iron. A battery, an inverter, a radio, a controller, etc. are housed inside the filling detection device main body 10B.

The antenna section 10a is attached to the upper part of the filling detection device main body 10B. The antenna section 10a is an example of an antenna means that wirelessly transmits sensor information regarding the concrete filled in the excavated hole P based on data from the sensor Sn.

The hanging part 10b is a part on which a wire of the crawler crane is hung, and is installed at the upper center of the filling detection device main body 10B.

The pipe connecting portion 10c is a rod-shaped member extending downward from the center of the lower part of the filling detection device main body 10B. The pipe connecting portion 10c and the pipe 10e to be inserted into the main reinforcing bar 41 are fixed by a connecting member 10d such as a clamp. The pipe 10e is a single pipe or a PVC pipe. Note that the pipe connecting portion 10c is not limited to the lower center of the filling detection device main body 10B, but may be located at any position or shape in the filling detection device main body 10B so that it can be connected to the pipe 10e. The pipe connecting portion 10c is an example of a fixing means for fixing the device main body within the excavated hole P. The pipe connecting portion 10c is an example of a fixing means for fixing to the reinforcing bar cage 40 installed in the excavated hole P. The pipe connecting portion 10c is an example of a fixing means that is fixed to the tip of the main reinforcing bar 41 of the reinforcing bar cage 40 extending in the excavation direction of the excavated hole P.

In the case of underwater pouring, it is necessary to make sure that the water level in the excavation hole P is higher than the height hc of the concrete top so that the filling detection device main body 10B is not submerged in water, and the length of the pipe 10e is It is set according to the water level hw in the borehole P.

As shown in FIG. 3, the filling detection device 10 includes a sensor terminal section 11, a communication section 12, a storage section 13, and a control section 14.

The sensor terminal section 11 has a connector for connecting cables that are lead wires from a plurality of sensors Sn. Each connector of the sensor terminal section 11 forms a channel and is connected to each sensor Sn on a one-to-one basis. Each connector of the sensor terminal section 11 is assigned an ID such as a channel number.

Sensor Sn is a sensor that detects filling of concrete. The sensor Sn may be any sensor that can detect a change in the environment in which the sensor is installed, such as a change from water to concrete or a change from air to concrete. Examples of the sensor Sn include a vibration sensor that detects oscillated vibrations, an optical fiber sensor that detects concrete filling based on temperature changes, a temperature sensor, a pressure sensor, a pH sensor, an electrical resistance sensor, an electrolytic sensor, and the like. When the sensor Sn is a vibration sensor that detects vibrations, the sensor may be paired with an oscillator that generates vibrations, or the oscillator may be a separate sensor. When the sensor Sn is a pressure sensor, it may be a piezo element that detects a change in electrical resistance due to a change in pressure, or an element that detects a change in capacitance due to a change in pressure.

Here, as shown in FIG. 4, each sensor Sn is attached to a spacer 43. The U-shaped spacer 43 prevents the inner wall of the casing tube Ct from coming into contact with the main reinforcing bars 41 and the band reinforcing bars 42 of the reinforcing bar cage 40. The installation positions of the sensors Sn are, for example, in each of the four directions near the top reinforcing bar 42, in the vicinity of the third reinforcing bar 42 from the top, in the vicinity of the reinforcing bar 42 in the fifth step from the top, etc. will be installed in The sensor Sn is installed according to a preset design drawing, such as a table, in which the installation position of the sensor Sn corresponds to the position of each connector of the sensor terminal section 11. In this way, the sensors Sn are installed at a plurality of depth positions in the excavation direction of the excavation hole P.

The communication unit 12 has a wireless communication function. The communication unit 12 controls the state of communication with the recording device 30 and the like via the antenna unit 10a. The communication unit 12 performs communication using radio waves in the 5 GHz band, 2.4 GHz band, etc., for example. Examples of the communication method of the communication unit 12 include communication standards used in wireless LAN (Local Area Network) and the like.

The storage unit 13 includes, for example, a silicon disk drive, a hard disk drive, or the like. The storage unit 13 stores various programs and the like for controlling the filling detection device 10. Examples of various programs include an operating system. Note that various programs may be acquired via a network such as a wireless communication network, or may be recorded on a recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc) so that the drive device can It may also be read through.

The storage unit 13 may have a database such as a table that associates the installation position of the sensor Sn with the channel number of each connector of the sensor terminal unit 11.

The control unit 14 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). In the control unit 14, the CPU reads and executes various programs stored in the ROM, RAM, and storage unit 13. The control unit 14 converts signals from each sensor Sn into data for transmission, and controls the communication unit 12.

Note that the relay device 20 is attached to the tip of the casing tube Ct. The relay device 20 relays the radio wave signal of the communication method of the communication unit 12 from the filling detection device 10 to the recording device 30. Relay device 20 has a relay antenna. Electric power may be supplied to the relay device 20 from the battery of the filling detection device 10, or the relay device 20 may have a battery. The relay device 20 is an example of a relay device that relays radio waves from the filling detection device 10 to the recording device 30.

(1.3 Configuration and functions of recording device 30)
Next, the configuration and functions of the recording device 30 will be explained using FIG. 5.

FIG. 5 is a block diagram showing an example of a schematic configuration of the recording device 30. As shown in FIG.

As shown in FIG. 5, the recording device 30 functioning as a computer includes a communication section 31, a display section 32, a storage section 33, an operation section 34, an input/output interface section 35, and a control section 36. The control section 36 and the input/output interface section 35 are connected via a system bus 37. For example, the recording device 30 is a personal computer, a portable wireless telephone including a smartphone, a PDA, or other portable terminal.

The communication unit 31 has a wireless communication function. The communication unit 31 controls the state of communication with the filling detection device 10 and the like. The communication unit 31 communicates with the filling detection device 10 using the same communication method as that of the communication portion 12 of the filling detection device 10 .

The display section 32 is configured by, for example, a liquid crystal display element, an EL (Electro Luminescence) element, or the like. The display unit 32 displays information such as the height of concrete in the excavation hole P.

The storage unit 33 includes, for example, a silicon disk drive or a hard disk drive. The storage unit 33 stores various programs for controlling the recording device 30. Examples of various programs include an operating system. Note that various programs may be obtained through a network such as a wireless communication network, or may be recorded on a recording medium such as a CD or DVD and read through a drive device. .

The storage unit 33 stores the data transmitted from the filling detection device 10 in association with the channel number of the sensor terminal unit 11. The storage unit 33 may store the received data from the filling detection device 10 together with the reception time as the measurement time.

The storage unit 33 may have a database such as a table that associates the installation position of the sensor Sn with the channel number of each connector of the sensor terminal unit 11.

The operation unit 34 includes, for example, a keyboard and a mouse. In the operation unit 34, the display unit 32 may be a touch switch type display panel such as a touch panel.

The input/output interface unit 35 is an interface between the communication unit 31 and the like and the control unit 36.

The control unit 36 includes, for example, a CPU, a ROM, and a RAM. In the control unit 36, the CPU reads and executes various programs stored in the ROM, RAM, and storage unit 23.

[2. Operation example of filling detection system]
Next, an example of the operation of the filling detection system will be described with reference to the drawings.

FIG. 6 is a schematic diagram showing an example of concrete filling in the filling detection system. FIG. 7 is a flowchart illustrating an example of the operation of the filling detection system according to the embodiment.

After the reinforcing bar cage 40 is built into the excavation hole P, the pipe 10e of the filling detection device main body 10B is inserted into the main reinforcing bar 41 of the reinforcing bar cage 40, and the filling detection device 10 is installed in the excavation hole P. Ru. Each sensor Sn is installed on the reinforcing bar cage 40 at a predetermined height. A cable from each sensor Sn is connected to the sensor terminal section 11 of the filling detection device 10.

As shown in FIG. 6, the tremie tube Tm is inserted into the excavated hole P. Note that the filling detection device 10 may be installed in the excavated hole P after the tremie tube Tm is installed.

Next, concrete placement begins. Concrete supplied from the mixer truck to the tremie pipe Tm is discharged from the lower end of the tremie pipe Tm.

Next, as shown in FIG. 7, the filling detection system 1 acquires data from each sensor Sn (step S1). Specifically, the control unit 14 of the filling detection device 10 acquires data from each sensor Sn via the sensor terminal unit 11. The control unit 14 converts into encoded information whether or not the concrete Cn has reached the sensor. For example, when the sensor Sn is a vibration sensor, the control unit 14 encodes the vibration data from the sensor Sn according to a predetermined threshold value for frequency conversion. The filling detection device 10 functions as an example of an acquisition unit that acquires data from a sensor for detecting the height of concrete filled in an excavation hole.

Note that, based on the channel number of the sensor terminal unit 11, the control unit 14 adds the channel number to the information as to whether or not the concrete Cn from each sensor Sn has reached the sensor Sn. The control unit 14 may add a measurement time to each piece of information from each sensor Sn.

Note that the control unit 14 may refer to the database of the storage unit 13 based on the channel number and convert the data from each sensor Sn into height h information of the concrete Cn in the excavated hole P. Sensor information regarding the concrete filled in the excavation hole P includes information encoded as to whether or not the concrete Cn has reached the sensor Sn, the channel number of the sensor Sn, the measurement time of the sensor Sn, and the height information of the concrete Cn. etc.

Next, the filling detection system 1 wirelessly transmits information from the sensor (step S2). Specifically, the communication unit 12 of the filling detection device 10 converts each information from each sensor Sn to which the channel number of the sensor terminal unit 11 is added, into a predetermined signal format, and transmits it to the recording device 30. . For example, the communication unit 12 digitally modulates the data, converts it into data for transmission, and transmits the data. Radio waves are emitted from the antenna section 10a of the filling detection device 10 and reach the recording device 30 via the relay device 20. Note that if the radio waves directly reach the recording device 30 from the filling detection device 10, the relay device 20 may not be used.

Next, the communication unit 31 of the recording device 30 receives and decodes the data, and determines whether the concrete has reached each sensor Sn as sensor information about the concrete filled in the excavation hole P. information, channel number, measurement time, etc.

The recording device 30 stores the extracted sensor information in the storage unit 33. For example, the control unit 36 stores information on whether concrete Cn has reached each sensor Sn, measurement time, etc. in the storage unit 33 in association with the channel number of each sensor Sn.

Next, the filling detection system 1 calculates the height of concrete, etc. (step S3). Specifically, the control unit 36 of the recording device 30 refers to the database of the storage unit 33 based on the channel number, and calculates the height h of the concrete Cn in the excavation hole P from the data from each sensor Sn. . More specifically, the control unit 36 refers to a table in which the relationship between the channel number stored in advance in the storage unit 33, the height at which the sensor Sn is installed, and the position in the hoop reinforcing bar 42 is designed, and determines the concrete Cn. The height h of the concrete Cn in the excavated hole P is calculated from the position of the sensor Sn with the maximum height among the captured sensors Sn.

When the sensor Sn located at the height h1 detects the concrete Cn, the control unit 36 calculates the height h of the concrete Cn to be the height h1. When the sensor Sn located at the height h2 detects the concrete Cn, the control unit 36 calculates the height h of the concrete Cn to be the height h2. When the sensor Sn located at the height h3 detects the concrete Cn, the control unit 36 calculates the height h of the concrete Cn to be the height h3.

Further, when all of the plurality of sensors Sn located at the height h1 detect the concrete Cn, the control unit 36 may calculate the height h of the concrete Cn to be the height h1. Further, when at least one of the plurality of sensors Sn located at the height h1 detects the concrete Cn, the control unit 36 may calculate the height h of the concrete Cn to be the height h1. Further, when more than half of the plurality of sensors Sn located at the height h1 detect the concrete Cn, the control unit 36 may calculate the height h of the concrete Cn to be the height h1.

Further, the control unit 36 calculates the temporal conversion of the height h of the concrete Cn based on the measurement times of the sensors Sn at the plurality of heights h1, h2, and h3, and calculates the rising speed, rising acceleration, etc. of the concrete Cn. Information on the filling status of concrete Cn may also be calculated. The recording device 30 may store information such as the calculated height of the concrete Cn in the storage unit 33.

Next, the filling detection system 1 displays information such as the height of concrete (step S4). Specifically, the control unit 36 of the recording device 30 displays a graph of the height h, rising speed, etc. of the concrete filled in the excavation hole P, and the status of each sensor Sn, etc. on the display unit 32. to be displayed.

Note that the recording device 30 may notify by sound depending on the height h. For example, when each sensor Sn located at a height h1, h2, h3 detects concrete Cn, the recording device 30 notifies the information of each height h1, h2, h3 by voice from a speaker. Furthermore, the recording device 30 may change the type of sound to be notified depending on the height.

Next, the filling detection system 1 controls the amount of concrete supplied (step S5). Specifically, the amount of concrete supplied from the mixer truck to the tremie pipe Tm is controlled. The recording device 30 transmits information such as the height h and rising speed of the concrete Cn filled in the excavated hole P to a concrete supply control device (not shown) that controls the supply of the concrete Cn. Note that the recording device 30 may transmit control information for controlling the concrete supply control device to the concrete supply control device. A concrete supply control device controls the supply amount of concrete Cn.

As a method of controlling the concrete supply amount, when the height reaches h1, the concrete supply amount is decreased, and when the height reaches h2, the concrete supply amount is further decreased to reach the height h3. In this case, the concrete supply amount is controlled so as to stop the concrete supply amount. The degree of decrease in the supply amount may be adjusted based on the passing times of the heights h1 and h2, that is, the rising speed of concrete.

Note that the operator may adjust the supply amount of concrete by viewing information such as the height h of the concrete Cn, the rising speed, and the status of each sensor Sn displayed on the display unit 32.

Next, the filling detection system 1 determines whether or not the process is finished (step S6). Specifically, the recording device 30 determines whether the height h3 has been reached. The recording device 30 may determine whether the power supply, program, etc. of the recording device 30 have ended.

If the process has not been completed (step S6; NO), the filling detection system 1 returns to the process of step S1 and acquires data from each sensor Sn.

If the process has ended (step S6; YES), the filling detection system 1 ends the series of operations. Specifically, the recording device 30 ends the program. The recording device 30 may send an operation stop signal to the filling detection device 10, and the filling detection device 10 may end its operation.

According to the filling detection device 10 according to the embodiment, the concrete filled in the excavated hole P is based on the data from the sensor Sn for detecting the height h of the concrete Cn filled in the excavated hole P. By transmitting sensor information wirelessly from the antenna part 10a of the device main body 10B fixed in the borehole P, there is no need to lay many cables from the borehole P to the outside, making it easier to install the tremie tube. , it is less likely to interfere with pouring work such as pulling out the casing.

Further, since it is not necessary to lay the cable from the excavation hole P to the outside, it is possible to save the effort of laying a number of cables.

Furthermore, the filling status of concrete Cn can be checked in real time from a remote location. Since the concrete filling status can be measured from a distance, there is no need to stop piling work.

In concrete casting of all-casing cast-in-place piles, the filling properties of concrete Cn near the pile head can be measured without relying on human senses. Further, it is also possible to easily digitize the record of the filling status of concrete Cn and create a form.

When the reinforcing bar cage 40 installed in the borehole P is fixed by the pipe connection part 10c, which is an example of a fixing means, it becomes easier to attach and remove the filling detection device 10 in the borehole P. .

When fixing to the tip of the main reinforcing bar 41 of the reinforcing bar cage 40 extending in the excavation direction of the excavation hole P, the filling detection device main body 10B of the filling detection device 10 is protected from water in the excavation hole P and concrete being placed. be able to.

When sensors Sn are installed at positions at a plurality of depths in the excavation direction of the excavation hole P, it becomes easier to control the supply amount of concrete to be placed. By installing a plurality of sensors Sn in the U-shaped spacer 43 near the reinforcing bar 42 at the same height or depth, it is possible to more reliably detect a filling failure in the covered part of the reinforcing bar.

The relay device 20 relays the radio waves from the filling detection device 10 to the recording device 30 outside the borehole P, so that even if the radio waves are difficult to reach, the radio waves from the filling detection device 10 to the recording device 30 can be transmitted from the filling detection device 10 to the recording device 30 to detect the filling inside the borehole P. It is possible to transmit sensor information regarding the concrete in use. Furthermore, by using the relay device 20, it is possible to check the concrete filling status in real time based on the detection results from a more remote location.

Note that when the concrete placement is completed, the cables of each sensor Sn are cut and separated from the filling detection device 10. The filling detection device main body 10B is recovered from inside the excavation hole P. Further, since the cable of the sensor Sn serves as the connection terminal of the sensor terminal section 11, the filling detection device 10 and each sensor Sn may be separated by pulling it out or the like.

The filling detection device 10 may acquire data from the buried sensor Sn by reconnecting the buried sensor Sn to the sensor terminal section 11, or while the filling detection device 10 remains installed in the excavation hole P. .

The filling detection device 10 may acquire data from the buried sensor Sn, measure the state of the poured concrete, and transmit the data to the recording device 30. Examples of the state of poured concrete include the hardening state of concrete, aging, etc.

The present invention may also be applied to concrete placement in underground wall construction methods and the like.

Furthermore, the present invention is not limited to the above embodiments. The above-mentioned embodiments are merely illustrative, and any embodiment that has substantially the same configuration as the technical idea stated in the claims of the present invention and provides similar effects may be used. It is included within the technical scope of the present invention.

1: Filling detection system 10: Filling detection device 10B: Filling detection device main body 10a: Antenna section (antenna means)
10c: Pipe connection part (fixing means)
20: Relay device 30: Recording device P: Drilling hole Sn: Sensor

Claims (5)

an acquisition means for acquiring data from a sensor for detecting the height of concrete filled in the excavation hole;
antenna means for wirelessly transmitting sensor information regarding concrete filled in the borehole based on data from the sensor;
a fixing means for fixing the device body in the excavation hole;
Equipped with
The fixing means is characterized in that, in a reinforcing bar cage installed in the excavation hole, a pipe is inserted into the main reinforcing bar of the reinforcing bar extending in the excavation direction of the drilling hole from the tip of the main reinforcing bar. Filling detection device. The filling detection device according to claim 1,
A filling detection device characterized in that a hanging part for hanging a wire is attached to the upper part of the main body of the filling detection device. The filling detection device according to claim 1 or 2 ,
A filling detection device characterized in that the sensor is installed at a plurality of depth positions in the excavation direction of the excavation hole. a filling detection device that detects the height of concrete filled in the excavation hole;
A filling detection system comprising: a recording device that records data on the height of the concrete;
The filling detection device includes:
an acquisition means for acquiring data from a sensor for detecting the height of concrete filled in the excavation hole;
antenna means for wirelessly transmitting sensor information regarding concrete filled in the borehole based on data from the sensor;
a fixing means for fixing the device body in the excavation hole;
has
The fixing means is characterized in that, in a reinforcing bar cage installed in the excavation hole, a pipe is inserted into the main reinforcing bar of the reinforcing bar extending in the excavation direction of the drilling hole from the tip of the main reinforcing bar. Filling detection system. The filling detection system according to claim 4 ,
A filling detection system further comprising a relay device that relays radio waves from the filling detection device to the recording device.

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