JP2878489B2 - Drilling hole measurement method and drilling hole measurement device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring method and a measuring device for measuring a state of a hole excavated in a vertical direction into the ground.

[0002]

2. Description of the Related Art Conventionally, an excavator for excavating a substantially vertical hole in the ground has a structure as shown in FIG. 7 and is formed from a base 3 of a steel turret 2 assembled on a ground surface 1. The tow rope 4 is hung, and one end of the tow rope 4 is towed by a tow motor 5 capable of reversing forward and backward. By performing the excavation operation, the hole 7 is excavated toward the ground.

[0003] For example, the drilling status such as whether the hole 7 is drilled straight is determined by a wire method, a laser method,
It is measured using a measuring device such as an ultrasonic method, and if it is excavated in a direction different from the plan due to the influence of soil, etc.,
The construction is being performed while controlling the excavator 6 so as to correct it. When the above-mentioned wire type measuring device is used, a measuring wire is stretched between the excavator 6 and the base 3, and the measuring wire in the hole 7 when viewed from the opening of the hole 7 is connected to a vertical line. The transit of the hole 7 is determined by measuring the deviation with the transit. The laser type measuring device is an optical measuring device using a laser beam. A measuring pipe is connected between the opening of the hole 7 and the drilling device 6, and the laser beam is inserted into the connected measuring pipe. The excavation state is measured from the propagation state of the laser beam between the opening and the excavator 6 when the laser beam is irradiated.

[0004] In addition, the ultrasonic type measuring device fills the inside of the hole 7 with water or muddy water, and measures the excavation state from the propagation state when ultrasonic waves are emitted using water as a propagation medium.

[0005]

However, the measuring means for measuring the excavation condition has the following problems. The drilled hole is filled with muddy water, which balances with the wall surface of the hole under its own weight and prevents the wall from collapsing. First, in the wire type measuring device, it is difficult to perform accurate measurement because the measuring wire is loosened due to muddy water or comes into contact with the inner wall of the hole. In order to measure a (long) hole or a hole having a small inner diameter, there is a problem that the effect cannot be obtained.

[0006] In the case of the laser type measuring apparatus, as described above, a measuring pipe must be laid between the opening of the hole and the excavator located deep in the hole. In addition, there is a problem that the waterproofing measures become extremely complicated because water leaking from the ground enters the joint portion of the measuring pipe to reduce the measuring accuracy.

[0007] The ultrasonic measuring device measures the excavation condition from the propagation state of the ultrasonic wave using the water filled in the hole as a propagation medium. descend. For this reason, the construction of the excavator is stopped for a long time until the operation of the excavator is stopped to obtain a still state of water, and there is a problem in measurement accuracy and efficiency of the measurement work.

The present invention has been made in view of the above-mentioned problems of the conventional drilling hole measuring means, and has a method of measuring a drilling hole with high measurement accuracy and excellent workability, and a drilling method using the same. It is an object to provide a hole measuring device.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention moves a detecting device having a built-in inclinometer and a rate sensor along a tow rope always towing an excavator. By calculating the position of the three-dimensional coordinates from the posture at each movement position of the detection device detected by the inclinometer or the rate sensor, to obtain the position of the excavator at the tip,
The shape of the whole hole from the start of excavation was obtained.

[0010]

According to the drilling hole measuring method and the drilling hole measuring device, the position of the excavator at the tip can be accurately measured even if the wire is loose. In addition, since the measurement accuracy is not affected by the internal environment of the excavated hole, the measurement operation is facilitated, and the measurement can be easily performed at any time.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. First, the structure of a borehole measuring device will be described with reference to FIG. 1. In FIG. 1, reference numeral 8 denotes a steel turret (partially shown) assembled on the ground surface, which is mounted on one base 9 of the steel turret 8. An excavator 13 is mounted in a suspended state via traction ropes 11 and 12 drawn from traction motors (not shown) that can be driven forward and reversely provided in the installed drive mechanism 10.

That is, the traction rope 11 drawn from the traction motor is connected to the reel 1 provided at one end of the base 9.
4 and 15 and the reel 1 provided on the upper end of the excavator 13
6 and the other tow rope 12 is wound around reels 17 and 18 provided at one end of the base 9 and another reel 19 provided at the upper end of the excavator 13. The excavator 13 is pulled up by winding the tow ropes 11 and 12 by a motor, and when the winding of the tow ropes 11 and 12 is loosened by the tow motor, the excavator 13 is lowered to enable excavation work. . The drive mechanism 10 automatically controls the winding and unwinding amounts of the tow ropes 11 and 12 so that the posture of the excavator 13 does not tilt.

Numeral 20 denotes a detecting device for measuring a borehole, which is pulled out from a traction motor (not shown) provided in a driving mechanism 22 installed on another base 21 and via a reel 23. The detecting device 24 is pulled up when the cable 24 is wound by the traction motor, and is detected when the winding is loosened.
Is reduced by its own weight. Further, the detection device 20 is provided with guide bearings 25 and 26 that are guided along the tow ropes 11 and 12,
The detection device 20 can always move up and down only along the tow ropes 11 and 12.

The cable 24 is used to transmit data between various sensors (to be described later) incorporated in the detection device 20 and a control device (not shown) provided on the drive mechanism 22 side. Transmission cables with excellent tensile strength are used. As shown in FIG. 2, the detection device 20 includes a pair of inclinometers 27 and 2 installed in the vertical and horizontal directions.
8, a rate sensor (or gyro compass) 29, and a depth gauge 30, and an arithmetic and communication circuit 31 further detects the inclinometers 27, 28, the rate sensor 29, and the detection device 20 based on the detection data output from the depth gauge 30. Calculate the position of
The calculation result is transmitted to the control device via the cable 24.

When measuring the state of excavation of a hole formed by the excavator 13, the excavator 13 is positioned at a deep portion of the hole, and the detecting device 20 is moved from the deep side to the opening side of the hole. When raising at a predetermined speed or lowering at a constant speed from the opening side of the hole to the deep side of the hole, the inclinometers 27 and 28 sequentially tilt the detecting device 13 and the rate sensor 29 rotates the detecting device 13 The depth gauge 30 automatically measures the depth of the detecting device 13 and calculates and communicates with the communication circuit 31.
Calculates the moving position of the detecting device 13 from these measured values as three-dimensional coordinate data (X, Y, Z) by a geometric operation, and transmits the data to an external control device via the cable 24.

The output signal of the inclinometers 27 and 28 is input to the A / D converter 34 via the low-pass filters 32 and 33, and the output signal of the inclinometer 27 and 28 is supplied to the A / D converter 34. The detection data is converted into detection data and supplied to the operation and communication circuit 31. The output signal of the rate sensor 29 is input to the integration circuit 35, and the integrated value is converted to the A / D converter 3.
4 is converted into digital data and supplied to the arithmetic and communication circuit 31, and the detection data of the depth gauge 30 is further supplied to the arithmetic and communication circuit 31.

Then, in order to measure the excavation state of the hole,
When the detection device 20 is moved at a constant speed along the tow ropes 11 and 12 as described above, the arithmetic and communication circuit 31 sequentially and three-dimensionally determines the movement position of the detection device 13 from these data in synchronization with a predetermined timing. , And each coordinate data (X1, Y1,
Y1), (X2, Y2, Y2) (Xn, Yn, Y
n) via a cable 24 to an external control device. The controller graphically displays these coordinate data on a display device such as a CRT display.

Therefore, the display device displays the moving position of the detecting device 20 from the opening of the hole to the deep portion.
Since the detection device 20 always moves along the tow ropes 11 and 12, this display three-dimensionally displays the shape of the hole with high accuracy. FIG. 4 shows an embodiment of the detection device 36 having another internal configuration. The difference from the detection device 20 shown in FIG.
Instead of the inclinometers 27, 28 and the rate sensor 29, three rate sensors 37, 37 directed in the direction of the three-dimensional coordinate axis,
38 and 39 are built-in. In addition, towing ropes 11 and 12
The connection to the cable 24 is the same as that of the detection device 20 shown in FIG.

Then, as shown in FIG. 5, each output signal of the rate sensors 37, 38, 39 is integrated with the integrating circuits 41, 42,
The signal is converted into detection data of a predetermined bit by being input to an A / D converter 44 via an arithmetic and communication circuit 45.
The detection data of the depth gauge 40 is further supplied to the calculation and communication circuit 45. Then, in order to measure the excavation state of the hole, the detection device 36 is connected to the tow rope 1 as described above.
When moving at a constant speed along the lines 1 and 12, the rate sensors 37, 38 and 39 detect the rotation of the three-dimensional coordinates. Therefore, the arithmetic and communication circuit 45 synchronizes with a predetermined timing and sequentially detects from these data. The moving position of the device 36 is calculated as three-dimensional coordinate data, and each coordinate data (X1, Y1, Y1), (X2, Y2,
Y2) (Xn, Yn, Yn) is transmitted to an external control device via the cable 24. The control device graphically displays these coordinate data on a display device such as a CRT display, so that the shape of the hole is accurately and three-dimensionally displayed.

FIG. 6 shows a modification of the towing mechanism for towing the excavator and the detector. The difference from the traction mechanism shown in FIG. 1 is that a driving mechanism 47 installed on a base 46 of a steel turret is used.
A digging device 52 is connected to the ends of traction ropes 50 and 51 which are drawn out of a traction motor (not shown) which can be driven forward and reverse and provided via reels 48 and 49 and are connected to the traction motor. Tow rope 50,5
1 is wound up, the excavator 52 is raised, and the tow ropes 50, 51 are loosened to lower the excavator 52.

Further, a detecting device 53 having a function similar to that shown in FIG. 2 or FIG. 4 is mounted so as to be guided by the traction ropes 50 and 51 by a bearing mechanism, and is connected to the upper end of the detecting device 53. Tow rope 54
Is wound on another traction motor (not shown) provided in the drive mechanism 47 via a reel 55, and further, a traction rope 55 connected to a lower end of the detection device 50 is connected to an upper end of the excavator 52. Is wound up by a further traction motor (not shown) provided in the drive mechanism 47 via a reel 56 provided on the base 46 and a reel 57 provided on the base 46.

When the detecting device 53 is lowered by simultaneously winding the tow rope 55 while loosening the tow rope 54, the detecting device 53 is pulled up by winding the tow rope 55 and simultaneously loosening the tow rope 55. , The detecting device 53 can always be moved along the tow ropes 50, 51. In addition, a data transmission cable 59 is connected between the detection device 53 and a control device provided on the drive mechanism 47 side.

According to such a configuration, since the detection device 53 is moved by towing the upper and lower tow ropes 54 and 55, the movement control of the detection device 53 can be performed more reliably than in the case shown in FIG. In addition, since the data transmission cable 59 is not provided with a pulling function, problems such as disconnection can be reduced. According to these embodiments described above, since the detecting device incorporating the inclinometer and the rate sensor is always moved along the tow rope that pulls the excavator, the direction of excavation of the hole and the shape of the entire hole can be easily adjusted. And it can measure with high precision.

[0024]

As described above, according to the present invention, the detector including the inclinometer and the rate sensor is always moved along the tow rope for towing the excavator, and the inclinometer and the rate sensor are moved. The position of the three-dimensional coordinates is calculated from the attitude of the detection device at each movement position detected by the method, and the position of the three-dimensional coordinates indicates the excavation direction of the hole and the shape of the entire hole. Thus, the state of excavation of a hole can be measured with high accuracy.

Further, since the measurement accuracy is not affected by the internal environment of the excavated hole or the like, the measurement operation is facilitated, and it has an excellent function that the measurement can be easily performed at any time.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the configuration of an embodiment of a borehole measuring device according to the present invention.

FIG. 2 is an explanatory view of the configuration of an embodiment of a detecting device applied to the borehole measuring device of the present invention.

FIG. 3 is a block diagram showing a circuit configuration of the detection device shown in FIG.

FIG. 4 is a configuration explanatory view of another embodiment of the detection device applied to the borehole measurement device.

FIG. 5 is a block diagram showing a circuit configuration of the detection device shown in FIG.

FIG. 6 is a configuration explanatory view of a modified example of the drilling hole measuring device of the present invention.

FIG. 7 is an explanatory diagram for explaining a conventional drilling hole measuring device.

[Explanation of symbols]

 8; steel turrets 9, 21, 46; bases 10, 22, 47; drive mechanisms 11, 12, 50, 51, 54; traction ropes 13, 52; excavators 14, 15, 16, 17, 18, 19, 23; Reel 20, 53; Detector 24, 59; Cable 27, 28; Inclinometer 29; Rate sensor or gyrocompass 30, 40; Depth gauge 31, 45; Calculation and communication circuit 37, 38, 39; , 49,55,56,57; reel

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21B 47/02 E21B 47/04

Claims (2)

(57) [Claims] An excavation hole measuring method for measuring a shape of an excavation hole excavated by an excavation device supported by a tow rope, wherein a detection device having a built-in inclinometer and a rate sensor is used to tow the excavation device. A method for measuring a drilling hole, wherein the hole is moved along a tow rope, and a shape of the hole is obtained by a geometric calculation in three-dimensional coordinates from a posture at each movement position of the detecting device detected by the inclinometer or the rate sensor. . 2. A drilling hole measuring device for measuring the shape of a drilling hole excavated by a drilling device supported by a towing rope, wherein the inclinometer and the rate sensor are built-in, and the A detecting device that is moved along; and calculating means that geometrically calculates the shape of the hole in three-dimensional coordinates from the posture at each moving position of the detecting device detected by the inclinometer or the rate sensor with the movement of the detecting device. An excavation hole measuring device comprising: