JP6812233B2 - Pile hole inspection method and pile hole inspection equipment - Google Patents

Description

The present invention relates to a pile hole inspection method and a pile hole inspection device for inspecting whether or not the hole bottom or hole wall of a pile hole has reached a support layer capable of ensuring the bearing capacity of the pile.

When building cast-in-place piles or ready-made piles in the pile holes drilled in the ground, it is confirmed whether the bottom of the pile holes has reached the support layer that can secure the bearing capacity (patent). Reference 1).

Japanese Patent No. 5619263

Conventionally, in the pile hole bottom inspection method for inspecting whether or not the hole bottom of the pile hole has reached the support layer that can secure the bearing capacity, whether or not the central portion of the hole bottom of the pile hole has reached the support layer is checked. Inspecting.
However, when the stratum of the ground is complicated, for example, the bearing capacity may differ between the central portion of the hole bottom of one pile hole and the peripheral portion of the hole bottom. Even when the inspection result shows that the central part of the hole bottom reaches the support layer, for example, when the diameter of the pile hole is relatively large, the peripheral part of the hole bottom does not reach the support layer. In some cases.
The present invention provides a pile hole inspection method and a pile hole inspection device capable of confirming whether or not the hole bottom or hole wall of a pile hole reaches the support layer.

The pile hole bottom side inspection method according to the present invention is a pile hole inspection method for inspecting whether or not the hole bottom or hole wall of a pile hole formed in the ground reaches the support layer, and is formed in the ground. A moving body equipped with a diving means having a screw and configured to be able to dive in all directions by remote control is thrown into the muddy water in the pile hole, and the moving body is remotely controlled to pile. It is characterized in that it is moved to the hole bottom or hole wall of the hole, and the measuring means provided in the moving body is remotely controlled to inspect whether or not the hole bottom or hole wall of the pile hole reaches the support layer. Therefore, it becomes possible to confirm whether or not the hole bottom or hole wall of the pile hole reaches the support layer.
Further, since the moving body is moved while confirming the position of the moving body, the inspection at a plurality of different positions in the pile hole can be accurately and surely performed. In addition, since it is possible to inspect the entire hole wall of the pile hole, the depth position of the hole wall that has reached the support layer can be known, and the rooting depth of the pile hole can be obtained from the depth position. You will be able to properly determine the position of the pile bottom.
Further, the moving body is moved to a plurality of different positions on the hole bottom of the pile hole or a plurality of different positions on the hole wall of the pile hole, and the measuring means is remotely controlled to determine whether or not the plurality of positions reach the support layer. Since the inspection can be performed at a plurality of different positions on the hole bottom of the pile hole and at a plurality of different positions on the hole wall of the pile hole, the hole bottom of the pile hole or the hole bottom can be inspected. It is possible to obtain a highly reliable inspection result indicating whether or not the hole wall has reached the support layer.
In addition, a slime removing means is provided on the moving body, and before the measuring means is remotely controlled to inspect whether or not the hole bottom of the pile hole reaches the support layer, the slime removing means is used to slime on the hole bottom of the pile hole. Since it is characterized by removing the pile hole, the inspection work can be performed immediately after the pile hole is constructed. In particular, when inspecting the bottom of the hole, the precipitate such as slime accumulated in the bottom of the hole can be removed, so that the precipitate such as slime does not become an obstacle and the inspection can be performed with high reliability. ..
The pile hole bottom side inspection device according to the present invention is a pile hole inspection device for inspecting whether or not the hole bottom or hole wall of a pile hole formed in the ground reaches the support layer, and is formed in the ground. It is inspected whether or not the moving body that is thrown into the muddy water in the pile hole and remotely controlled and the hole bottom or the hole wall of the pile hole that is provided in the moving body and is remotely controlled reach the support layer. The moving body is provided with a measuring means, and the moving body is provided with a diving means having a screw and is configured to be able to dive in the muddy water in all directions by remote control. Therefore, the bottom or the hole wall of the pile hole is It becomes possible to inspect whether or not the pile hole reaches the support layer, and it becomes possible to confirm whether or not the hole bottom or hole wall of the pile hole reaches the support layer.
Further, the submersible means of the moving body is provided on the base of the moving body, and the base includes a support pillar and an end support provided on one end side of the support pillar, and the number of end supports is plural. The screw support hole is provided with a screw support ring, and the screw support ring is such that the outer ring is rotatably attached to the screw support hole and the inner ring rotates to the inner peripheral surface of the outer ring. Rotation of the submersible screw on a rotation center axis formed at the tip of a screw support strut, which is composed of a double ring that can be attached and extends from the inner peripheral surface of the inner ring toward the center of the inner ring. It is characterized in that the center is attached and the screw is formed rotatably .
Further, since the moving body is provided with a slime removing means for removing slime on the bottom of the pile hole, the measurement surface can be cleaned immediately before the inspection, and the hole of the pile hole is renewed after the pile hole is constructed. Inspection work can be performed immediately after the pile hole is constructed without cleaning the bottom. In particular, when inspecting the bottom of the hole, the precipitate such as slime accumulated in the bottom of the hole can be removed, so that the precipitate such as slime does not become an obstacle and the inspection can be performed with high reliability. ..

The schematic diagram which shows the outline of the pile hole inspection method using the pile hole inspection apparatus. The perspective view which shows the structure of a moving body. The figure which shows the measuring method by a measuring means.

Embodiment 1
As shown in FIG. 1, the pile hole inspection method according to the first embodiment is formed in the ground in order to inspect whether or not the hole bottom B side of the pile hole H formed in the ground reaches the support layer. A moving body 1 configured to be movable in the muddy water W by remote control was thrown into the muddy water W in the pile hole H, and the moving body 1 was remotely controlled to move to the hole bottom B side of the pile hole H. Later, a method of remotely controlling the measuring means 14 provided on the moving body 1 to inspect whether or not the hole bottom B of the pile hole H and the hole wall C on the hole bottom B side of the pile hole H reach the support layer. The pile hole inspection device according to the first embodiment for realizing the method will be described below.

As shown in FIG. 1, the pile hole inspection device includes a moving body 1 to be remotely controlled, a position detecting means 2 for detecting the self-position of the moving body 1, and a remote control for remotely controlling the moving body 1. It includes an operation control device 3.

As shown in FIG. 2, for example, the moving body 1 includes a diving means 12 for diving in the muddy water W in the pile hole H, and slime and the pile hole H on the hole bottom B of the pile hole H on the base 11. Slime removing means 13 for removing slime on the hole wall C on the hole bottom B side, measuring means 14 for inspecting whether or not the hole bottom B side of the pile hole H reaches the support layer by remote control, and positions. A detection means 2 is provided.

The base 11 of the moving body 1 includes a support column 21 and an end support 22 provided on one end side of the support column 21.
The support pillar 21 is formed in a hollow shape (cylindrical shape) with both ends open, for example, one end of the slime suction hose 24 is connected to the one end opening 23, and the other end opening side of the support pillar 21 is connected. , The measuring means 14 is attached.
The end support 22 is, for example, four submersible screw supports configured so that the center is located at a position 90 ° away from each other along the circumferential direction of the support column 21 with the center line of the support column 21 as the center. It is provided with a hole 25. A dive screw support ring 31 provided with a dive screw 30 is attached to the dive screw support hole 25.

The submersible screw support ring 31 is composed of a double ring. The outer ring 32 is rotatably attached to the submersible screw support hole 25, and the inner ring 33 is rotatably attached to the inner peripheral surface of the outer ring 32. For example, the outer ring 32 can be formed by attaching an unexpected rotation support shaft provided at a position 180 ° away from each other in the circumferential direction on the outer peripheral surface of the outer ring 32 to an unexpected bearing hole of the submersible screw support hole 25. The axis orthogonal to the central axis of the outer ring 32 is rotatably configured as the rotation central axis. Further, an unexpected rotation support shaft provided at a position 180 ° away from each other in the circumferential direction on the outer peripheral surface of the inner ring 33 is attached to an unexpected bearing hole on the inner peripheral surface of the outer ring 32, whereby the inner ring is formed. The axis 33 is rotatably configured with an axis orthogonal to the central axis of the inner ring 33 as a rotation center axis. The rotation center axis of the outer ring 32 and the rotation center axis of the inner ring 33 are provided at positions separated from each other by 90 ° in the circumferential direction of the outer ring 32.
Then, the dive screw 30 is rotatably provided with the central axis of the inner ring 33 as the rotation center axis 34. For example, the rotation center of the diving screw 30 is attached to the rotation center shaft 34 formed at the tip of the submersible screw support column 35 provided so as to extend from the inner peripheral surface of the inner ring 33 toward the center of the inner ring 33. The submersible screw 30 is rotatably formed.
That is, the rotation center axis of the inner ring 33 and the rotation center axis of the outer ring 32 are rotationally controlled by a step motor or the like (not shown) controlled by a control signal from the control device 52 of the remote operation control device 3. The direction of the rotation central axis 34 of the dive screw 30 can be changed, and the moving body 1 can dive in all directions (see FIG. 2B). Further, the rotation center axis 34 of the dive screw 30 is configured to be rotationally driven by a motor (not shown) controlled by a control signal from the control device 52 of the remote control control device 3.
That is, the dive screw support hole 25, the outer ring 32 rotatably provided in the dive screw support hole 25, the inner ring 33 rotatably provided inside the outer ring 32, and the inner ring 33 can be rotated. The attached submersible screw 30 constitutes a submersible means 12 for submerging and moving the moving body 1.

The slime removing means 13 is composed of an injection device that injects air or water. For example, a compression device 37 that generates compressed air or compressed water is mounted on the end support 22 of the moving body 1, and the compressed air or compressed water from the compression device 37 is injected onto the side surface of the end support 22. An injection nozzle 38 is provided.

As shown in FIG. 3, the measuring means 14 has, for example, a measuring unit 40 pressed against the ground of the hole bottom B of the pile hole H or the hole wall C on the hole bottom B side of the pile hole H, and the measuring unit 40 at the hole bottom. It is provided with a pressing means 41 for pressing against the ground of B or the hole wall C, and a measuring instrument (not shown) for measuring an evaluation value.
The measuring unit 40 is formed by means for pressing against the ground, for example, a pressing portion such as a pressing plate for pressing the ground, or a means for penetrating into the ground, for example, a penetrating portion such as a penetrating rod penetrating into the ground.
The pressing means 41 is formed by, for example, a hydraulic cylinder. The cylinder 42 of the hydraulic cylinder is positioned in the hollow portion of the support column 21, and is attached to the other end opening end surface of the support column 21 by a mounting means such as a mounting bracket 43. Then, a pressing portion or a penetrating portion forming the measuring portion 40 is provided at the tip of the piston rod 44 of the hydraulic cylinder 41 attached to the support column body 21.
Two or more mounting brackets 43 are provided, for example, along the circumferential direction of the cylinder 42 at predetermined intervals. For example, three mounting brackets 43 are provided at 120 ° intervals, or four mounting brackets 43 are provided at 90 ° intervals, and the cylinder 42 is attached to the support column 21 by the plurality of mounting brackets 43.
Then, the slime is sucked by the slime suction hose 24 connected to the suction device 24a, and is taken into the support column 21 through the gaps between the mounting brackets 43 and 43, and then passes through the slime suction hose 24. It is configured to be discharged to the ground.

When the measuring portion 40 is formed by the pressing portion, the hydraulic cylinder 41 is remotely operated to press the pressing portion against the ground of the hole bottom B of the pile hole H or the hole wall C on the hole bottom B side of the pile hole H. The displacement amount of the ground (the extension amount of the piston rod 44 of the hydraulic cylinder 41) when a predetermined load is applied may be used as an evaluation value. That is, as a condition of the ground required as a support layer, the relationship between the predetermined load applied to the ground and the predetermined displacement amount of the ground when the predetermined load is applied is obtained in advance, and the predetermined load is applied to the ground. If the displacement amount of the ground is smaller than the predetermined displacement amount when the above is added, it is determined that the ground has reached the support layer. The pressing portion as the measuring portion 40 is difficult to penetrate into the ground by forming the tip portion in a curved surface shape, a spherical shape, a flat shape, or the like to increase the area in contact with the ground. It is preferable to use the one configured as described above.

When the measuring portion 40 is formed by the penetration portion, the hydraulic cylinder 41 is remotely operated to press the penetration portion against the ground of the hole bottom B of the pile hole H or the hole wall C on the hole bottom B side of the pile hole H. The amount of penetration of the penetration portion into the ground (the amount of extension of the piston rod 44 of the hydraulic cylinder 41) when a predetermined load is applied to the ground may be used as an evaluation value. That is, as a condition of the ground required as a support layer, the relationship between a predetermined load applied to the ground and a predetermined penetration amount of the intrusion portion when the predetermined load is applied is obtained in advance, and a predetermined value is applied to the ground. If the penetration amount of the penetration portion is smaller than the predetermined penetration amount when a load is applied, it is determined that the ground has reached the support layer. The penetration portion of the measuring portion 40 has, for example, a conical, pyramidal, sharp-edged, arrowhead-shaped, or columnar shape at the tip to reduce the area in contact with the ground. It is preferable to use one that is configured so that it can easily penetrate the ground.

Further, the hydraulic cylinder 41 is remotely controlled to press the pressing portion or the intrusion portion as the measuring portion 40 described above against the ground of the hole bottom B of the pile hole H or the hole wall C on the hole bottom B side of the pile hole H. The pressing resistance and the penetration resistance when a predetermined load is applied may be used as an evaluation value. In this case, as a condition of the ground required as a support layer, the relationship between the predetermined load applied to the ground and the pressing resistance and the penetration resistance when the predetermined load is applied is obtained in advance, and the predetermined load is applied to the ground. If the pressing resistance and the penetration resistance are larger than the predetermined values when the above is added, it is determined that the ground has reached the support layer.
The amount of extension of the piston rod 44 of the hydraulic cylinder 41, the amount of deformation of the ground (the amount of subduction of the ground), and the amount of penetration of the intrusion portion as the above-mentioned evaluation values are as an unexpected measuring instrument provided on the moving body 1. It may be measured by a displacement sensor (stroke sensor), a distance measuring sensor, or the like. Further, the pressing resistance and the penetration resistance as the above-mentioned evaluation values are measured by the amount of oil supply to the hydraulic cylinder 41 as a measuring instrument, or a load cell as an unexpected measuring instrument provided at the tip of the measuring unit 40. It may be measured by the load value or the like.

The reaction force from the ground at the time of measurement by the measuring means 14 is received by the propulsive force by the submersible means 12 that submerges the moving body 1 in the direction of the ground. That is, by controlling the rotation of the submersible screw 30 so that the direction in which the measuring unit 40 presses the ground and the propulsion direction of the moving body 1 are the same direction, the reaction force from the ground at the time of measurement by the measuring means 14 is measured. Receive it with the moving body 1. When the reaction force cannot be received by the propulsive force of the moving body 1, for example, the moving body 1 is attached to a pole 60 fixed at the center position of the hole bottom B of the pile hole H (see FIG. 1). A telescopic arm (not shown) for connecting is provided on the moving body 1, and the moving body 1 and the telescopic arm are remotely operated so that the pole 60 is gripped by the grip portion provided at the tip of the telescopic arm. By connecting the above to the pole 60, the reaction force from the ground at the time of measurement may be received.

The position detecting means 2 includes a self-position information acquiring means 15 and a position calculating means 16 that calculates the self-position data of the moving body 1 based on the data acquired from the self-position information acquiring means 15.
The position detecting means 2 is provided on, for example, a self-position information acquiring means 15 composed of a gyroscope and an acceleration sensor attached to the base 11, and the base 11 or the remote operation control device 3, and the moving body 1 moves. It is provided with a position calculation means 16 configured by a position calculation program that calculates the self-position data of the moving body 1 based on the data acquired from the gyroscope and the acceleration sensor each time.
That is, the position calculating means 16 includes the orientation data (roll, pitch and yaw angle angles) of the moving body 1 from the gyroscope and the acceleration of the moving body 1 from the acceleration sensor in the three directions of the X, Y and Z axes. Is received, and the acceleration is converted into absolute coordinates by the orientation data and integrated to calculate the self-position information (posture and moving distance of the moving body) of the moving body 1.
The position detecting means 2 is mounted on the tip end side of the support column 21 of the moving body 1, for example, as shown in FIGS. 1 and 2.

As shown in FIG. 1, the remote control control device 3 includes an operation unit 50, an image display 51, and a control device 52. The control device 52 transmits a control signal to the motor of the submersible means 12 of the moving body 1 based on the contents operated by the operation unit 50, and receives the self-position information of the moving body 1 from the position detecting means 2. The position of the moving body 1 in the pile hole H is displayed on the display screen of the image display 51.
Further, the control device 52 receives the measurement result by the measuring means 14 and displays it on the display screen of the image display 51.

An inspection method using the pile hole inspection device of the first embodiment will be described.
First, the moving body 1 is thrown into the muddy water W in the pile hole H formed in the ground, and the submersible means 12 of the moving body 1 is remotely controlled to measure the moving body 1 on the hole bottom B side of the pile hole H. Move to the target position. At this time, the operator operates the operation unit 50 while viewing the position tracking image of the moving body 1 displayed on the display screen of the image display 51 of the remote control control device 3, and the dive screw 30 of the dive means 12. The orientation is adjusted, and the moving body 1 is moved to the target measurement target position.
Then, after confirming that the moving body 1 has moved to the measurement target position, the slime removing means 13 is operated to remove the slime on the ground at the measurement target position, and then the pressing means 41 is operated to operate the measuring unit 40. Is pressed against the ground (see FIG. 3B), and the measurement is performed by controlling the rotation of the submersible screw 30 so that the direction of pressing the ground by the measuring unit 40 and the propulsion direction of the moving body 1 are the same. Do. Then, the evaluation value measured by the measuring device is transmitted to the control device 52 of the remote control control device 3, and the evaluation value is displayed on the display screen of the image display 51.
In this case, the reference evaluation value required for the support layer is obtained in advance by an experiment, and the reference evaluation value is stored in the control device 52.
Then, the control device 52 compares the received evaluation value with the reference evaluation value, and displays on the display screen of the image display 51 whether or not the ground has reached the support layer.

In the first embodiment, the inspection by the measuring means 14 is performed at a plurality of different positions of the pile hole H in the hole bottom B and at a plurality of different positions along the circumferential direction of the hole wall C on the hole bottom B side of the pile hole H. I do.
That is, the inspection by the measuring means 14 is performed at a plurality of different positions on the hole bottom B side of the pile hole H.

Then, if the measured evaluation value reaches the standard evaluation value, it is determined that the ground on the hole bottom B side has reached the support layer, and if the measured evaluation value does not reach the standard evaluation value, the said After further excavating the bottom of the pile hole H to deepen the depth of the pile hole H, the measurement is performed again, and the depth of the pile hole H is deepened until the measured evaluation value reaches the reference evaluation value.
Then, after the evaluation value of the ground on the hole bottom B side reaches the standard evaluation value, a reinforcing bar cage is inserted into the pile hole H, and the muddy water W in the pile hole H is replaced with concrete to form a cast-in-place concrete pile. By construction, the pile bottom side of the pile hole H, that is, the hole bottom B of the pile hole H and the hole wall C on the hole bottom B side of the pile hole H are reliably supported by the support layer in a highly reliable cast-in-place. You will be able to construct concrete piles.

According to the first embodiment, the moving body 1 provided with the measuring means 14 is remotely controlled to inspect the pile hole H at a plurality of different positions in the hole bottom B, and the hole on the hole bottom B side of the pile hole H. Since the inspection can be performed at a plurality of different positions along the circumferential direction of the wall C, a highly reliable inspection result indicating whether or not the hole bottom B and the hole wall C on the hole bottom B side have reached the support layer can be obtained. be able to.
Further, since the moving body 1 of the pile hole inspection device is provided with the position detecting means 2, the remote operator can perform the inspection while confirming the position of the moving body 1, and can accurately perform the inspection at a plurality of different positions. And surely.
Further, since the moving body 1 of the pile hole inspection device is provided with the slime removing means 13 and the measurement surface can be cleaned immediately before the inspection, the hole bottom B of the pile hole H and the hole bottom B of the pile hole H are reconstructed after the pile hole H is constructed. Inspection work can be performed immediately after the pile hole is constructed without cleaning the hole wall C on the side. In particular, when inspecting the hole bottom B, the sediment such as slime accumulated in the hole bottom B can be removed, so that the precipitate such as slime does not become an obstacle and the inspection can be performed with high reliability. become.
Further, since the moving body 1 can be moved and inspected while checking the position of the moving body 1, the state of the ground at each position along the circumferential direction of the hole wall C can be known in detail. Therefore, the entire ground around the hole wall C reaches the support layer, and a certain part of the ground around the hole wall C reaches the support layer but there is a part of the ground around the hole wall C. It can be seen that the support layer has not been reached, for example, the boundary of the support layer is slanted around the pile hole H. If the entire ground around the hole wall C does not reach the support layer, the bottom of the pile hole H is further excavated until the entire ground around the hole wall C reaches the support layer, and the entire ground around the hole wall C is removed. After reaching the support layer, by further excavating the bottom of the pile hole H until the desired rooting depth is reached, it is possible to form a pile hole H capable of reliably supporting the pile to the support layer. Become.
In addition, the drilling bucket (not shown) is rotated to excavate the ground little by little, and the state of the hole wall C of the hole after excavation is inspected by moving the moving body 1 while checking the position of the moving body 1. As a result, the state of the hole wall C of the pile hole H can be inspected in order from the ground side, and the entire hole wall of the pile hole H can be inspected. In this case, since the depth position of the hole wall C that has reached the support layer can be known, the rooting depth of the pile hole H can be obtained from the depth position, and the position of the hole bottom B can be determined. You will be able to make appropriate decisions.
Further, after the pile hole H is formed by the drilling bucket, the moving body 1 can be moved while checking the position of the moving body 1 to inspect the entire hole wall or the entire hole bottom of the pile hole H.
Further, since the moving body 1 is provided with the submersible means 12 and one end of the slime suction hose 24 whose other end is connected to the suction device 24a is connected to the moving body 1, the muddy water W is stirred by the submersible screw 30 to mix the slime. It can be sucked to the ground through the slime suction hose 24, and the slime suction work can be performed together with the inspection work. It is preferable to perform the inspection after sucking the slime.

Embodiment 2
The measuring unit 40 may be formed by a rotary fan attached to the tip of the piston rod 44 of the hydraulic cylinder 41. In this case, by pressing the rotary fan against the hole bottom B or the hole wall C during measurement and rotating the rotary fan during non-measurement, the slime is supported by the support pillar 21 through the gap between the mounting brackets 43 and 43. It becomes easier to be taken into the internal space of the body, and the slime suction effect is improved.

Embodiment 3
The measuring means 14 may have a configuration in which a pressure detecting means such as an earth pressure gauge is attached to the tip of the piston rod 44. In this case, for example, a displacement sensor (stroke sensor), a distance measuring sensor, etc., which are not shown in the figure, determine the amount of extension of the piston rod 44 from the time when the earth pressure gauge in contact with the ground detects the pressure until the predetermined pressure value is measured. The amount of extension of the piston rod 44 from the detection of the pressure to the measurement of a predetermined pressure value is used as an evaluation value for evaluating the ground. In this case as well, the reference evaluation value required for the support layer is obtained in advance by experiment, and if the measured evaluation value reaches the reference evaluation value (that is, the measured evaluation value (extension amount of the piston rod) is the reference evaluation. If it is less than or equal to the value (extension amount of the piston rod), it is judged that the ground has reached the support layer, and if the measured evaluation value does not reach the standard evaluation value (that is, the measured evaluation value (that is, the measured evaluation value). (If the extension amount of the piston rod) is larger than the standard evaluation value (extension amount of the piston rod)), the bottom of the pile hole H is further excavated to deepen the depth of the pile hole H, and then the measurement is performed again. The depth of the pile hole H may be increased until the measured evaluation value reaches the reference evaluation value.
For example, the amount of dent in the ground from the detection of pressure to the measurement of a predetermined pressure value is measured by a distance measuring sensor or the like, and this amount of dent is evaluated as an evaluation value for evaluating the rigidity of the ground. You may.
Further, the pressure value when the soil pressure gauge is pressed against the ground by supplying a constant oil pressure to the hydraulic cylinder 41 and extending the piston rod 44 may be used as an evaluation value.
Further, a hardness tester as a measuring unit 40 is provided at the tip of the piston rod 44 to press the hardness tester against the ground, and the direction of pressing the ground with the hardness tester and the propulsion direction of the moving body 1 are in the same direction. By controlling the rotation of the dive screw 30, the hardness value measured by the hardness tester may be used as an evaluation value.
These evaluation values are also transmitted to the control device 52 of the remote control control device 3, and the evaluation values are displayed on the display screen of the image display 51.

Embodiment 4
The measuring means 14 may be a measuring means for realizing a surface wave inspection method, which is a method of estimating the hardness of the ground based on the difference in the transmission speed of the surface wave.
Although not shown, the measuring means 14 for realizing the surface wave inspection method is provided on the moving body 1 and is provided with a vibration means such as a hammer that generates a surface wave called a Rayleigh wave by hitting the ground, and a surface wave. It is composed of detectors installed at two points to detect the above, and the hardness of the ground is judged by using the propagation time of the surface wave propagating between the two points as an evaluation value. In this case, the detector is separately installed on the hole bottom B or the hole wall C on the hole bottom B side at the time of measurement, and the surface wave information detected by the two detectors is provided, for example, in the remote control control device 3. The propagation time as an evaluation value may be calculated by analyzing with an analysis program.

Embodiment 5
The measuring means 14 may be a measuring means for realizing an elastic wave exploration method, which is a method of inspecting the ground structure by utilizing the fact that elastic waves generate phenomena such as refraction and reflection at boundaries having different physical properties. ..
Although not shown, the measuring means 14 for realizing the elastic wave exploration method is provided on the moving body 1 and is provided with a vibration means such as a hammer that generates elastic waves by hitting the ground, and detection for detecting elastic waves. It is composed of a vessel, and the hardness of the ground is judged by using the elastic wave transmission speed from the vibration point to the detection point as an evaluation value. In this case, the detector is separately installed in the hole bottom B or the hole wall C on the hole bottom B side at the time of measurement, and the information of the elastic wave detected by the detector is input to, for example, an analysis program provided in the remote control control device 3. The elastic wave transmission rate as an evaluation value may be calculated by analyzing with.

Embodiment 6
The measuring means 14 is for realizing an electromagnetic wave (ground penetrating radar) exploration method for exploring the ground structure by measuring the propagation time until the electromagnetic wave emitted from the transmitting antenna to the ground is reflected by the ground and captured by the receiving antenna. It may be a measuring means.
Although not shown, the measuring means 14 for realizing the electromagnetic wave exploration method is a transmitting antenna provided on the moving body 1 to transmit electromagnetic waves and a receiving antenna provided on the moving body 1 to receive electromagnetic waves reflected in the ground. It consists of a measuring device that measures the propagation time until the electromagnetic waves emitted from the transmitting antenna into the ground are reflected in the ground and captured by the receiving antenna, and the ground structure is imaged based on the reflection pattern that can be seen from the propagation time. An image may be created on the display screen of the display 51, and the hardness of the ground may be determined based on this image.

Embodiment 7
Further, the position detecting means 2 includes, for example, a pole 60 (see FIG. 1) fixed at the center position of the hole bottom of the pile hole H, a ring (not shown) provided so as to surround the pole 60, and a pole. A configuration including a plurality of receivers (not shown) provided on the 60 and the ring and a transmitter (not shown) provided on the moving body 1 is provided, and an ultrasonic signal or a radio wave signal is transmitted from the transmitter to the receiver. Etc. may be sent, and the three-dimensional coordinates of the moving body 1 may be acquired by measuring the distance between the transmitters and receivers by measuring the propagation time thereof.

In the embodiment, the inspection by the measuring means 14 is performed at a plurality of different positions of the pile hole H in the hole bottom B and at a plurality of different positions along the circumferential direction of the hole wall C on the hole bottom B side of the pile hole H. However, at least the moving body 1 is remotely operated to move the moving body 1 to a plurality of different positions in the hole bottom B of the pile hole H, and the measuring means 14 provided in the moving body 1 is remotely operated. By inspecting whether or not a plurality of different positions of the pile hole H in the hole bottom B reach the support layer, it is possible to confirm whether or not the entire hole bottom B of the pile hole H reaches the support layer. Become.

Further, a moving body not provided with the position detecting means 2 may be used. That is, the pile hole is made by moving the moving body to a predetermined position of the hole bottom B while maintaining the posture of inspecting the hole bottom B of the pile hole H to perform measurement, and then randomly moving the moving body. A plurality of different positions in the hole bottom B of H may be inspected.

Further, a moving body not provided with the slime removing means 13 may be used. That is, after performing the slime removal work, the moving body may be thrown into the muddy water W in the pile hole H for inspection.

Instead of connecting the slime suction hose 24 to the moving body, the slime suction hose may be used to suck the slime separately.

Further, the shape of the moving body does not have to be the shape described above. For example, it may have a shape like a submarine, a shape like a disk, a shape like a sphere, or the like.

1 mobile body, 2 position detecting means, 13 slime removing means, 14 measuring means,
B Pile hole bottom, C Pile hole hole wall, H Pile hole.

Claims (7)

It is a pile hole inspection method for inspecting whether or not the hole bottom or hole wall of a pile hole formed in the ground reaches the support layer.
A mobile body equipped with a diving means having a screw and configured to be able to dive in all directions by remote control is thrown into the muddy water in a pile hole formed in the ground, and the moving body is remotely controlled. Then, it is moved to the hole bottom or hole wall of the pile hole, and the measuring means provided in the moving body is remotely controlled to inspect whether the hole bottom or hole wall of the pile hole reaches the support layer. A featured pile hole inspection method. The pile hole inspection method according to claim 1, wherein the moving body is moved while confirming the position of the moving body. The moving body is moved to a plurality of different positions on the hole bottom of the pile hole or a plurality of different positions on the hole wall of the pile hole, and the measuring means is remotely controlled to determine whether or not the plurality of positions reach the support layer. The pile hole inspection method according to claim 2, wherein the pile hole is inspected. A slime removing means is provided on the moving body, and the slime removing means is used to remove the slime on the hole bottom of the pile hole before the measuring means is remotely controlled to inspect whether the hole bottom of the pile hole reaches the support layer. The pile hole inspection method according to any one of claims 1 to 3, wherein the pile hole inspection method is performed. A pile hole inspection device for inspecting whether the hole bottom or hole wall of a pile hole formed in the ground reaches the support layer.
Whether or not the moving body that is thrown into the muddy water in the pile hole formed in the ground and remotely controlled and the hole bottom or hole wall of the pile hole that is provided in the moving body and remotely controlled reaches the support layer. and a measuring means for inspecting,
The moving body is a pile hole inspection device characterized in that it is equipped with a diving means having a screw and is configured to be able to dive in all directions in muddy water by remote control . The submersible means of the moving body is provided on the base of the moving body.
The substrate includes a support column and an end support provided on one end side of the support column.
The end support has multiple screw support holes and
A screw support ring is attached to the screw support hole,
The screw support ring consists of a double ring with the outer ring rotatably attached to the screw support hole and the inner ring rotatably attached to the inner peripheral surface of the outer ring.
The rotation center of the submersible screw is attached to the rotation center axis formed at the tip of the screw support column provided so as to extend from the inner peripheral surface of the inner ring toward the center of the inner ring, and the screw is rotatably formed. by pile hole inspection apparatus according to claim 5, characterized in that the. The pile hole inspection apparatus according to claim 5 or 6, wherein the moving body includes a slime removing means for removing slime on the hole bottom of the pile hole.

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