JP3353181B2 - Drilling device for measuring groove by RI method and measuring device using the drilling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of civil engineering and construction, and more particularly to the measurement of soil density and water content by the RI method applied to the management of fill near the ground surface of a fill dam. The present invention relates to a drilling device and a measuring device using the drilling device.

[0002]

2. Description of the Related Art Conventionally, when measuring the density and moisture content of soil, as shown in FIG. Alternatively, a sampling method is known in which soil having a size of 30 cm and a depth of 20 cm or 30 cm is directly collected in a sample container and measured by a measuring device. Also, as shown in FIG. 8, a source of gamma rays and neutrons that emits gamma rays and neutrons is inserted into the ground, and the gamma rays and neutrons emitted from the two sources are respectively detected on the ground. A radiation measurement (RI) method in which measurement is performed by a detector and a moisture detector is known. In this RI method, the amount of gamma rays passing through the soil is measured with a detector, and the density can be determined from the amount. Similarly, by detecting the amount of neutron rays with a detector The soil moisture content can be determined.

[0003]

However, among the above-mentioned conventional methods, the sampling method shown in FIG. 7 is time-consuming and takes time to obtain a measured value, and the measurement accuracy is poor. There is a problem that it is difficult to collect deep points. Further, R shown in FIG.
In method I, the radiation path is unstable and is affected by irregularities on the ground surface, so that the measurement accuracy is poor. In addition, since all the radiation is picked up by a detector such as a GM tube, the measurement accuracy is poor. There is a problem that. further,
In the RI method, since the measured value is a point in the soil, there is a problem that the number of measurement points must be increased as shown in FIG. The means has not been reached.

The present invention has been made to solve the above problems, and has an apparatus for excavating a measurement groove by the RI method capable of measuring the density and water content of soil in a short time, with high accuracy and with a simple operation. An object of the present invention is to provide a measuring device using the excavator.

[0005]

For that purpose, the RI of the present invention is used.
The excavation device for the measurement groove by the method includes a lifting pedestal 2 installed so as to be able to move up and down, a column 5 provided on the lifting gantry 2, a bracket 6 fixed to an upper portion of the column 5, and an upper end fixed to the bracket 6. A spline shaft 7a whose lower end is rotatably supported by the support base 3, a support arm 8 fixed to an upper portion of the spline shaft 7a, and a first arm disposed on the support arm 8
, A screw jack 9a connected to the output shaft of the first motor M1, a rotary table 11 fitted to the spline shaft 7a, and a screw portion of the screw jack 9a fixed to the rotary table 11 A nut member 12 to be screwed;
A second motor M2 disposed on the turntable 11; and a center hole drilling auger 13 connected to an output shaft of the second motor M2.
A hollow shaft 20 provided on the elevating gantry 2, a hollow shaft 20
Gear 21 and second gear 2 mounted on the outer periphery of
2, a third motor M3 and a fourth motor M4 for rotating the first gear 21 and the second gear 22, a rotating drum 23 connected to the first gear 21, and a rotating drum 2
3 is provided with an outer peripheral groove excavating mill 29 mounted on the side wall of the rotary drum 23 and an earth discharging device 31 provided on the side wall of the rotary drum 23.
2 is rotated.

A measuring apparatus using the excavator according to the present invention comprises a lifting platform 2 which can be raised and lowered, a column 5 provided on the lifting frame 2, and two arms fixed on the column 5. A bracket 6 having an upper end and one arm 6
a first spline shaft 7a which is fixed to the support base 3 and whose lower end is rotatably supported by the support base 3, a support arm 8 which is fixed to an upper portion of the first spline shaft 7a, and which is disposed on the support arm 8. A first motor M1, a first screw jack 9a connected to an output shaft of the first motor M1, a rotating table 11 fitted to the first spline shaft 7a, and a rotating table 1
A nut member 12 fixed to the first screw jack 9a and screwed to the screw portion of the first screw jack 9a; a second motor M2 disposed on the turntable 11; and an output shaft of the second motor M2. Auger 13 for excavating a center hole, a second spline shaft 7b whose upper end is fixed to the other arm 6b and whose lower end is rotatably supported by the support base 3, and which is fixed to an upper portion of the second spline shaft 7b. A supporting arm 15, a fifth motor M5 disposed on the supporting arm 15, a second screw jack 9b connected to an output shaft of the fifth motor M5,
A turntable 17 fitted to the second spline shaft 7b, a nut member 18 fixed to the turntable 17 and screwed to a screw portion of the second screw jack 9b, and disposed on the turntable 17 Detector built-in pipe 19, a hollow shaft 20 provided on the elevating gantry 2, a first gear 21 and a second gear 22 mounted on the outer periphery of the hollow shaft 20, and a first gear 21 and a second gear 21. A third motor M3 and a fourth motor M4 for rotating the gear 22; a rotary drum 23 connected to the first gear 21; an outer peripheral groove excavation mill 29 mounted on a side wall of the rotary drum 23; And an earth discharging device 31 provided on the side wall of the rotating drum 23, wherein the outer groove mill 29 and the earth discharging device 31 are rotated by the second gear 22.

[0007] The numbers added to the above configuration are for comparison with the drawings for easy understanding of the present invention, and the configuration of the present invention is not limited by these numbers.

[0008]

In the present invention, the auger 13 for excavating the center hole is rotated by the second motor M2, and the auger 13 for excavating the center hole is lowered by driving the first motor M1 to rotate the screw jack 9a. Drill a hole. Further, by driving the third motor M3,
By rotating the rotary drum 23 via the first gear 21 and driving the fourth motor M4, the second gear 2
The outer peripheral groove is excavated by rotating the outer peripheral groove excavating mill 29 and the earth discharging device 31 through the lower part 2 to lower the elevating gantry 2.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show one embodiment of an apparatus for excavating a measuring groove by the RI method of the present invention and a measuring apparatus using the excavating apparatus. FIG. 1 is cut along the line BB in FIG. FIG. 2 is a sectional view taken along line AA of FIG. 1 and viewed in the direction of the arrow, FIG. 3 is a sectional view taken along line CC of FIG. 2 and viewed in the direction of the arrow, and FIG. 4 is a partial cross-sectional view taken along the line DD in FIG. 3 and viewed in the direction of the arrow, FIG. 5A is a front view viewed from the direction E in FIG. 4, and FIG. 5B is a line FF in FIG. FIG. 4 is a cross-sectional view taken along a line in FIG.

1 and 2, an excavating / measuring device 1 includes an elevating gantry 2 installed on a target ground so as to be able to ascend and descend in a direction indicated by an arrow Z1. It has two supports 5 on the top. This pillar 5
A bracket 6 having two arms 6a and 6b is fixed to the upper part of the arm. The upper end of the first spline shaft 7a is fixed to one arm 6a, and the lower end of the first spline shaft 7a is turned to the support base 3. It is movably supported. A support arm 8 is fixed above the first spline shaft 7a, and a first motor M1 is disposed on the support arm 8. A first screw jack 9a is connected to an output shaft of the first motor M1, and a lower end of the first screw jack 9a is rotatably supported by the support arm 10.

One end of a turntable 11 is spline-fitted to the first spline shaft 7a, a nut member 12 is fixed to the center of the turntable 11, and a second end is connected to the other end of the turntable 11. Motor M2 is disposed. A center hole drilling auger 13 is connected to the output shaft of the second motor M2. The nut member 12 is screwed into the screw portion of the first screw jack 9a, and when the first screw jack 9a rotates by rotation of the first motor M1, the turntable 11 moves to the first position.
Up and down in the Z2 direction along the spline shaft 7a of
The rotary table 11 is configured to rotate in the X1 direction in FIG. 2 by manually rotating the first spline shaft 7a.

1 to 3, an upper end of a second spline shaft 7b is fixed to the other arm 6b of the bracket 6, and a lower end of the second spline shaft 7b is rotatably supported by the support base 3. Have been. A support arm 15 is fixed above the second spline shaft 7a.
Above the fifth motor M5 is disposed. A second screw jack 9b is connected to an output shaft of the fifth motor M5, and a lower end of the second screw jack 9b is rotatably supported by the support arm 16.

One end of a turntable 17 is spline-fitted to the second spline shaft 7b, a nut member 18 is fixed to the center of the turntable 17, and a detector is attached to the other end of the turntable 17. A built-in pipe 19 is provided. The nut member 18 is screwed into the screw portion of the second screw jack 9b,
When the second screw jack 9b is rotated by the rotation of the fifth motor M5, the turntable 17 moves up and down in the Z3 direction along the second spline shaft 7b.
Due to the rotation of the spline shaft 7b of FIG.
It is configured to rotate in two directions.

In FIG. 3, a support table 3 and a lifting frame 2
The hollow shaft 20 penetrates through the shaft, and a third motor M3 and a fourth motor M4 are disposed on the elevating gantry 2. Each of the motors is driven by hydraulic pressure or electric power. A first gear 21 and a second gear 22 are rotatably mounted on the outer periphery of the hollow shaft 20 below the elevating gantry 2, and a rotary drum 23 is connected to the first gear 21. The first gear 21 is engaged with a first pinion 25 fixed to the output shaft of the third motor M3, and the second gear 22 is fixed to the output shaft of the fourth motor M4. The second pinion 26 is configured to be engaged. An outer peripheral groove excavating rod 27 is attached to the side wall of the rotating drum 23, and an outer peripheral groove excavating mill 29 is attached to the lower end of the outer peripheral groove excavating rod 27 so as to protrude from the lower end of the rotating drum 23. A third pinion 30 is fixed to the upper end of the rotating shaft of the outer circumferential groove excavating mill 29, and the third pinion 30 is configured to mesh with the second gear 22.

In FIGS. 4 and 5, on the side wall of the rotating drum 23, an earth discharging device 31 is provided. The earth discharging device 31 has a drive shaft 32 and a driven shaft 33, and the drive shaft 3
A chain 37 is wound around sprockets 35 and 36 fixed to the driven shaft 33 and the driven shaft 33, and a plurality of earth discharging buckets 39 are fixed to the chain 37. The drive shaft 32 is connected to a speed reducer 40 fixed on the rotating drum 23,
A fourth pinion 42 is fixed to the 0 input shaft 41, and this pinion 41 meshes with the internal teeth of the second gear 22. A protection plate 4 for protecting the earth discharging bucket 39 is provided between the earth discharging device 31 and the outer circumferential groove excavating mill 29.
3 are provided. G indicates an outer peripheral groove to be excavated.

The operation of the excavator of the present invention having the above configuration will be described. First, the excavation of the center hole will be described. The turntable 12 is manually rotated, and the auger 13 for excavating the center hole is opposed to the hollow shaft 20 (the state of FIG. 1).
Next, the second motor M2 is driven to rotate the auger 13 for excavating the center hole, and the first motor M1 is driven to rotate the first screw jack 9a, so that the turntable 11 and the excavator for excavating the center hole are driven. The auger 13 is lowered along the first spline shaft 7a, and a center hole is excavated. The excavated remaining soil is discharged to the outside by the auger 13 for excavating the center hole itself.

Next, the excavation of the outer circumferential groove will be described. In FIG. 3, by driving a third motor M <b> 3, the rotating drum 23 is rotated via the first pinion 25 and the first gear 21. In addition, by driving the fourth motor M4, the outer peripheral groove excavation mill 29 is rotated via the second pinion 25, the second gear 22, and the third pinion 30. Further, as shown in FIG.
The earth discharging device 31 is rotated via the pinion 42, the speed reducer 40, and the drive shaft 32. When the elevating gantry 2 is lowered, the outer circumferential groove is excavated, and the excavated residual soil is discharged to the outside by the discharging bucket 39.

Next, a measuring method using the excavator according to the present invention will be described with reference to FIG. As center hole T, inner diameter 3
Excavation at about 5 cm and depth of about 30-40 cm
The excavation is about 3 to 5 cm wide and about 15 to 20 cm deep. Reverse the first motor M1 to auger 1 for center hole drilling
3 is raised, and the turntable 11 is manually moved to X1 in FIG.
The detector built-in pipe 19 is opposed to the hollow shaft 20 by rotating the turntable 17 in the X2 direction in FIG. Next, the fifth motor M5 is driven to rotate the second screw jack 9b, and the turntable 17 and the detector built-in pipe 19 are lowered along the second spline shaft 7b and inserted into the center hole T. I do.

As shown in FIG. 6C, a storage hole 45 is formed at the tip of the rotary drum 23, and the storage hole 45 is formed.
A radiation source 46 is inserted therein and sealed with a screw lid 47, and
The rotating drum 23 is inserted through the first pinion 25 and the first gear 21 by lowering the elevating gantry 2 to insert the rotating drum 23 into the outer peripheral groove G and driving the third motor M3. . Then, as shown in FIGS. 6A and 6B, the radiation source is detected by the detector while rotating and raising the radiation source, and the data processing is performed based on the detected amounts of the gamma rays and the neutron rays. Computer calculates the soil density and water content.

The present invention is not limited to the above embodiment, and various modifications can be made by those having ordinary knowledge in the technical field to which the present invention belongs. For example, in the above-described embodiment, the measurement is performed after excavation. However, the radiation source is attached to the lower part of the rotating drum 23 in advance, and the detection unit is provided at the tip of the auger 13 for excavating the center hole. It is also possible to measure while installing and excavating at the same time.

[0021]

As is apparent from the above description, according to the present invention, it is possible to excavate a measurement groove composed of a central hole and an outer peripheral groove with less unevenness on the excavation surface. In addition, by using the excavator of the present invention, the entire area within a certain range can be measured without being affected by unevenness of the ground surface, so that the soil density and the water content can be measured in a short time, with high accuracy, and with a simple operation. can do.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along a line BB in FIG. 2 and viewed in a direction of an arrow, showing one embodiment of an apparatus for excavating a measuring groove by the RI method and a measuring apparatus using the excavating apparatus according to the present invention. .

FIG. 2 is a sectional view taken along the line AA in FIG. 1 and viewed in the direction of the arrow.

FIG. 3 is a cross-sectional view taken along line CC of FIG. 2 and viewed in the direction of the arrow.

FIG. 4 is a partial cross-sectional view taken along line DD of FIG. 3 and viewed in the direction of the arrow.

5 (A) is a front view as viewed from a direction E in FIG. 4, and FIG. 5 (B) is a cross-sectional view taken along a line FF in FIG. 4 and viewed in an arrow direction.

FIG. 6 is a conceptual diagram for explaining a measurement method using the excavator according to the present invention.

FIG. 7 is a diagram for explaining a conventional sampling method.

FIG. 8 is a diagram for explaining a conventional RI method.

FIG. 9 is a diagram for explaining a problem of the present invention.

[Explanation of Signs] 1 ... Excavation / measurement device, 2 ... Elevating rack, 3 ... Support, 5 ...
Prop, 6 ... Bracket 6a, 6b ... Arm, 7a, 7b ... Spline shaft, 8,
15: Support arm 9a, 9b: Screw jack, 10, 16: Support arm 11, 17: Rotating table, 12, 18: Nut member, 13 ...
Auger for excavating a central hole 19 ... Pipe with a built-in detector, 20 ... Hollow shaft, 21 ... First gear 22 ... Second gear, 23 ... Rotary drum, 25 ... First pinion 26 ... Second pinion, 27 ... Peripheral groove drilling rod, 2
Reference Signs List 9 outer peripheral groove excavating mill 30 third third pinion 31, 31 earth discharging device, 32 drive shaft, 33 driven shaft 35, 36 sprocket, 37 chain, 39 earth discharging bucket 40 reduction gear 41 ... input shaft, 42 ... fourth pinion,
43: protection plate M1 to M7: motor, G: outer peripheral groove, T: center hole

Continuation of the front page (56) References JP-A-7-42141 (JP, A) JP-A-49-4301 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 1 / 00 E21B 7/00

Claims (2)

(57) [Claims] An elevating platform which can be lifted and lowered, a support provided on the elevator, a bracket fixed to an upper portion of the support, an upper end fixed to the bracket, and a lower end turned to the support base. A spline shaft movably supported, a support arm fixed to an upper portion of the spline shaft, a first motor disposed on the support arm, and an output shaft of the first motor. A screw jack, a turntable fitted to the spline shaft, a nut member fixed to the turntable and screwed to a screw portion of the screw jack, and a second member disposed on the turntable. Motor, a center hole drilling auger connected to the output shaft of the second motor, a hollow shaft provided on the elevating gantry, a first gear mounted on the outer periphery of the hollow shaft, and a second gear. A first gear and a second gear A third motor and a fourth motor for rotating the gear, a rotating drum connected to the first gear, an outer circumferential groove excavating mill mounted on a side wall of the rotating drum, and a rotating drum on the side wall of the rotating drum. An earth removal device provided, wherein the outer peripheral groove excavation mill and the earth removal device are provided in the second
An excavator for a measurement groove by the RI method, which is rotated by a gear. 2. An elevating platform which is installed so as to be able to ascend and descend, a column provided on the elevating frame, and a column fixed to an upper portion of the column.
A bracket having a plurality of arms, a first spline shaft having an upper end fixed to the one arm and a lower end rotatably supported by the support, and a support fixed to an upper portion of the first spline shaft An arm, a first motor disposed on the support arm, a first screw jack connected to an output shaft of the first motor, and a rotation fitted to the first spline shaft And the first fixed to the turntable.
A nut member screwed into the screw portion of the screw jack, a second motor provided on the turntable, a center hole drilling auger connected to an output shaft of the second motor, A second spline shaft fixed to the other arm and a lower end rotatably supported by the support base; a support arm fixed to an upper portion of the second spline shaft; A fifth motor provided, a second screw jack connected to an output shaft of the fifth motor, a turntable fitted to the second spline shaft, and fixed to the turntable. A nut member screwed into a screw portion of the second screw jack, a detector built-in pipe disposed on the rotary table, a hollow shaft provided on the elevating platform, and an outer periphery of the hollow shaft. A first gear and a second gear to be mounted, and the first gear and the second gear; A third motor and a fourth motor for rotating the second gear and a second gear; a rotary drum connected to the first gear; an outer peripheral groove excavation mill mounted on a side wall of the rotary drum; And an earth removal device provided on a side wall of the drum, wherein the outer peripheral groove excavation mill and the earth removal device are rotated by the second gear. .