JP2003148959A - Insertion type measuring instrument, and drilling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion type measuring instrument (gyro scope) inserted into a curved drilled hole of a small inner diameter (small in its diameter) and a small curvature radius, and a drilling method using the measuring instrument. SOLUTION: This measuring instrument includes a measuring instrument main body 3, a main body casing 3C for surrounding the measuring main body 3, a measuring instrument auxiliary equipment (electric cable connecting unit, signal converter, input and output interface and the like) 5, an auxiliary equipment casing for surrounding the measuring instrument auxiliary equipment 5, and a joining part (for example, universal joint 7). The joining part 7 connects the measuring instrument main body 3 and the main body casing 3C to the measuring instrument auxiliary equipment 5 and the auxiliary equipment casing 5C, and constituted to be foldedly bent to change a relative positional relation of the measuring instrument main body 3 and the main body casing 3C with respect to the measuring instrument auxiliary equipment 5 and the auxiliary equipment easing 5C (to deform a measuring instrument main body 3 side and the auxiliary equipment 5 side foldedly halfway).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insertion type measuring instrument which is inserted into a drilling hole to measure a drilling direction and / or an inclination angle of the drilling hole, and an improvement of a drilling method using the measuring instrument. .

[0002]

2. Description of the Related Art As a method of controlling excavation accuracy in a small-diameter excavation hole, there are an electromagnetic wave method, a visual target method, an insertion method using a gyro / inclinometer, and the like.

In the electromagnetic wave system, since it is necessary to transmit and receive electromagnetic waves, it is impossible to practically use it if there is a building or the like on the transmitting side and / or the receiving side, or the accuracy is remarkably reduced.

The visual target method is also difficult to use because it cannot be seen due to a curve in the case of excavating a curve (increasing in recent years), especially in sharp curve excavation.

In order to deal with the problems of the above two methods, FIG.
There is proposed a gyroscope (insertion type measuring instrument 10) indicated by reference numeral 10 which is used in an insertion type such as a gyro / tilt device as shown in FIG.

The gyroscope 10 has a tip portion 40, a measuring instrument body 30, and a measuring instrument body 30 in this order from the bottom to the top of the drawing.
A main body casing 30C surrounding the measuring instrument main body 30,
It is composed of a measuring instrument accessory equipment 50, an accessory equipment casing 50C surrounding the measuring instrument accessory equipment 50, a hanger 6, and a hanging cable 8.

The measuring instrument auxiliary equipment 50 comprises a power source, a power cable connecting unit, a signal converter, an input / output interface and the like.

Further, a centralizer 9 made of an elastic body is provided at the outer peripheral portion of the auxiliary equipment casing 50C at the center in the longitudinal direction and the outer peripheral portion of the tip end of the main body casing 30C, and a gyroscope is provided in the drill hole H. When inserting 1, the gyroscope 1 acts so as to be positioned (centered) at the center of the drilled hole H.

However, as is clear from FIG. 8, when the gyroscope (10) has a long overall length as a measuring instrument (longitudinal dimension is large), it becomes difficult to insert the gyroscope into a small bore hole. There is. For example, it is possible to insert into a straight excavation hole (H) as shown in FIG. 9 or into a curved excavation hole (H) with a large radius of curvature as shown in FIG. However, as shown in FIG. 11, when the gyroscope (10) is inserted into the curved excavation hole (H) having a small radius of curvature, it interferes with the inner wall surface (W) of the excavation hole and the gyroscope (10) cannot be inserted.

In recent years, the frequency of using a gyroscope in a small-diameter drilling hole such as so-called "curved boring" is increasing, and a solution to the above-mentioned problem that the gyroscope (10) becomes difficult to insert is desired. However, no effective solution has been found at this time.

[0011]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art, and provides a curved drill hole having a small inner diameter (small diameter) and a small radius of curvature. The purpose is to provide an insertion type measuring instrument (gyroscope) that can be inserted without problems and an excavation method using it.

[0012]

The insertion type measuring instrument (gyroscope 1) of the present invention comprises a measuring instrument main body (3), a main body casing (3C) surrounding the measuring instrument main body (3), and an auxiliary instrument. Equipment (power cable connection unit, signal converter, input / output interface, etc.) (5), an auxiliary equipment casing that surrounds the measuring equipment auxiliary equipment (5), and a joint portion (for example, a universal joint 7), The joint part (7) connects the measuring instrument main body (3) and the main body casing (3C) to the measuring instrument auxiliary equipment (5) and the auxiliary equipment casing (5C), and the measuring instrument main body (3). In order that the relative positional relationship between the main body casing (3C) and the measuring instrument auxiliary equipment (5) and the auxiliary equipment casing (5C) may be easily changed (the measuring equipment main body 3 side and the auxiliary equipment 5 side are of the middle folding type). Transform into And it is configured to freely as a) folding (claim 1).

As described above, the dimension of the conventional gyroscope (10) in the longitudinal direction is too large, and the curved portion (Br) having a small radius of curvature interferes with the inner wall surface of the borehole (it cannot be inserted into the curved portion) and cannot be inserted. It becomes a state.

On the other hand, according to the insertion-type measuring instrument (gyroscope 1) of the present invention having the above-mentioned structure, the insertion-type measuring device has a center-folding structure in the longitudinal direction.
In the curved portion (rapidly curved portion Br) having a small radius of curvature, the measuring unit main body (3) and the main body casing (3C) are operated by the action of the joint portion (for example, the universal joint 7).
Is bent with respect to the measuring instrument auxiliary equipment (5) and the auxiliary equipment casing (5C), and the insertion measuring instrument (gyroscope 1) of the present invention is adapted to the small radius of curvature of the sharp bending portion (Br), so that excavation is performed. No interference occurs between the hole (H) and the measuring instrument (1).

Therefore, according to the insertion type measuring instrument (gyroscope 1) of the present invention, the conventional gyroscope (1
0) can be inserted into an excavation hole (H) having a curved portion (a sharply curved portion Br) having a small diameter and a small radius of curvature that cannot be passed through and can pass through the excavation hole (H). Can be done.

Further, even if it is a middle folding type, it is constructed so that it can function as the gyroscope (1).

That is, each of the measuring instrument (3) and the measuring instrument auxiliary equipment (5) is not constructed so as to straddle a joint (for example, the universal joint 7), and the joint (7) is used. Since each of them is independently configured, the members do not interfere with each other when the joint portion (7) is bent. Therefore, it is possible to exert all the necessary functions as the insertion type measuring instrument (gyroscope 1).

According to the present invention, when excavating a curved excavation hole (H) such as a so-called "curved boring", it is possible to excavate a curved excavation hole (a sharply curved portion Br) having a small radius of curvature. Becomes In other words, a "sharp curve" can be used as the locus of the excavation hole (H). In addition, the access distance from the ground to the horizontal portion of the drill hole (H) becomes short.

In the area near the building (so-called "shadow of the building"), the number of locations (bottom and back) where the excavation hole cannot be excavated by the conventional excavation method is reduced.

It becomes easy to avoid an obstacle part of excavation. As a result, it is necessary to dig "sew" holes between ground improvement piles, dig holes to pass between pipes, and dig holes to pass between existing buildings. Is easily done.

Further, the excavation method using the insertion type measuring instrument (gyroscope 1) of the present invention excavates an excavation hole (H) having a small diameter and a small radius of curvature (a sharply curved portion Br). Step, insertion step of inserting the insertion type measuring instrument (gyroscope 1) into the drill hole (H), and the propulsion direction and / or the inclination angle of the drilling hole by the inserted insertion type measuring instrument (gyroscope 1). In the inserting step, the inserted measuring instrument (gyroscope 1) is inserted into a joint portion (for example, the universal joint 7) in the bending portion (the sharp bend portion Br) having a small radius of curvature in the inserting step. ), The shape corresponds to the small radius of curvature of the sharp bend (Br) (the insertion type measuring instrument or the gyroscope 1 has a middle bending type) (claim 2).

In carrying out the present invention, the insertion direction of the insertion type measuring instrument (gyroscope 1) inserted into the drill hole (H) (or the drilling direction of the drill hole H) may be the vertical direction. It may be inclined in the opposite direction. Furthermore, the insertion direction of the insertion-type measuring instrument (gyroscope 1) or the excavation direction of the excavation hole H may be the horizontal direction or the direction inclined upward.

[0023]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a gyroscope generally designated by reference numeral 1 includes a tip portion 4, a measuring instrument main body 3, a main body casing 3C surrounding the measuring instrument main body 3, and a universal joint 7 in order from the bottom to the top of the drawing. A measuring instrument accessory facility 5, an accessory facility casing 5C surrounding the measuring instrument accessory facility 5, and a hanging part 6
And a cable 8 for suspension.

The measuring instrument main body 3 including the main body casing 3C and the measuring instrument auxiliary equipment 5 including the auxiliary equipment casing 5C are completely separated by a universal joint 7. Therefore, even if the joint part is broken, the function of the gyroscope will not be abnormal.

The measuring instrument auxiliary equipment 5 comprises a power source, a power cable connecting unit, a signal converter, an input / output interface and the like.

Further, a centralizer 9 made of an elastic material is provided on the outer peripheral portion of the tip portion 4 and the outer peripheral portion of the measuring instrument main body casing 3C, and when the gyroscope 1 is inserted into the excavation hole H. Drilling hole G for gyroscope 1
It acts to position (center) the center of.

2 to 5 show a curved portion B having a small radius of curvature.
It is a process drawing in case the gyroscope 1 is inserted in the excavation hole H of small diameter which has r, and is measured. First, in FIG. 2, the gyro 1 descends while using the hanging cable 8 and starts to be inserted into the excavation hole H.

In FIG. 3, the curved portion Br is approached, and the point P9 in the figure at the tip and the point P3 in the measuring instrument body casing 3C are shown.
The point and the point P5 in the figure at the upper end of the incidental equipment casing 5C come into contact with the wall surface of the curved portion Br, and the gyro stops once descending, or the descending speed falls below a predetermined value.

When the gyro stops descending, or when the descending speed falls below a predetermined value, the auxiliary equipment casing 5C on the upper side and the measuring instrument body casing 3C on the lower side are bent at the center of the universal joint 7 automatically or manually. Then, it starts refracting (state of FIG. 4) and starts descending again.

When the descent is resumed and the radius of curvature is further reduced and the resistance at the time of descent is increased, the gyro 1 stops descent again, or the descent speed becomes a predetermined value or less, and further the bending at the universal joint 7 part occurs. It operates so that the angle increases, continues to descend, and reaches the bottom of the drill hole H shown in FIG. 5 or the vicinity of the bottom.

According to this embodiment having such a configuration,
As in the prior art, it is of course possible to insert the linear drilling hole H shown in FIG. 6 or the curved drilling hole BHR having a large radius of curvature as shown in FIG. Since the equipment casing 5C side and the casing 3C side of the lower measuring instrument body are bent in the middle bent state, as shown in FIGS.
The gyroscope 1 can also be inserted in r.

Then, it becomes possible to excavate while measuring the excavation direction with the gyroscope 1. That is, when excavating a curved excavation hole such as a so-called “curved boring”, it is possible to excavate a curved portion having a small radius of curvature. In other words, a "sharp curve" can be used as the locus of the drill hole.

The area near the building (so-called "shadow of building")
The area where the drilling hole cannot be drilled by the conventional drilling method (lower portion, back surface portion) is reduced.

As a result, it becomes easy to avoid obstacles for excavation. For example, excavation holes are "sewn" between ground improvement piles, or excavated so as to pass between pipes. It becomes easy to drill a drill hole so as to pass between existing buildings.

The illustrated embodiment is merely an example,
It is not a statement to the effect of limiting the technical scope of the present invention. For example, in the illustrated embodiment, the excavation hole H is excavated in the vertical direction, and the insertion direction of the gyroscope 1 is also displayed in the vertical direction. However, the insertion direction of the gyroscope 1 or the excavation direction of the excavation hole H is not limited to the vertical direction. The insertion direction of the gyroscope 1 or the excavation direction of the excavation hole H may be a direction inclined with respect to the vertical direction, may be a horizontal direction, or may be an upward inclination direction. It can be.

[0036]

The effects of the present invention are listed below. (1) When excavating a curved excavation hole such as a so-called “curved boring”, it becomes possible to excavate a curved portion having a small radius of curvature. In other words, a sharp curve can be used. (2) The access distance from the ground to the horizontal part of the drill hole is shortened. (3) The area near the building (so-called “shadow of the building”) where the excavation hole cannot be excavated by the conventional excavation method (the lower portion, the back surface portion) is reduced. (4) It becomes easy to avoid obstacles for excavation. as a result,
It's easy to drill "holes" between ground improvement piles, to drill between pipes, and to drill between existing buildings. Done.

[Brief description of drawings]

FIG. 1 is a sectional view showing the overall configuration of a measuring instrument according to an embodiment of the present invention.

FIG. 2 is a diagram showing a first step in a measuring instrument insertion and measurement process diagram of an excavation hole having a curved portion with a small radius of curvature according to an embodiment of the present invention.

FIG. 3 is a diagram showing a second step in the measuring instrument insertion and measurement process diagram of a drill hole having a curved portion with a small radius of curvature according to an embodiment of the present invention.

FIG. 4 is a diagram showing a third step in the measuring instrument insertion and measurement process diagram of a drill hole having a curved portion with a small radius of curvature according to an embodiment of the present invention.

FIG. 5 is a diagram showing a final step in a measuring instrument insertion and measurement process diagram of a drill hole having a curved portion with a small radius of curvature according to an embodiment of the present invention.

FIG. 6 is a view showing a measuring instrument insertion state in a straight borehole according to the embodiment of the present invention.

FIG. 7 is a diagram showing a state in which a measuring instrument is inserted in an excavation hole having a curved portion with a large radius of curvature in the embodiment of the present invention.

FIG. 8 is a sectional view showing the overall configuration of a conventional measuring instrument.

FIG. 9 is a diagram showing a state in which a measuring instrument is inserted in a straight hole in the prior art.

FIG. 10 is a diagram showing a state in which a measuring instrument is inserted in an excavation hole having a curved portion with a large radius of curvature in the related art.

FIG. 11 is a diagram showing a state in which a measuring instrument is inserted in an excavation hole having a curved portion with a small radius of curvature in the related art.

[Explanation of symbols]

1 ... Gyroscope 3 ... Measuring instrument body 3C ... Main body casing 5: Equipment attached to measuring instruments 5C ... Auxiliary equipment casing 6 ... Hanging parts 7 ... Universal joint 8 ... Cable for suspension 9 ... Centralizer H ... Drilling hole Br: sudden turn

Continued front page    (72) Inventor Kazuo Yamanaka             Chemika, 1-6-4 Moto-Akasaka, Minato-ku, Tokyo             Inside Le Grout Co., Ltd. F term (reference) 2F105 AA10 BB13

Claims (2)

[Claims] 1. A measuring instrument main body, a main body casing surrounding the measuring instrument main body, a measuring instrument incidental equipment, an incidental equipment casing enclosing the measuring instrument incidental equipment, and a joint portion, the joint portion comprising: Connecting the measuring instrument main body and the main body casing to the measuring instrument auxiliary equipment and auxiliary equipment casing, and
An insertable measuring instrument, wherein the measuring instrument main body and main body casing are configured to be bendable so that the relative positional relationship between the measuring instrument main body and the measuring instrument auxiliary equipment and the auxiliary equipment casing can be easily changed. 2. The excavation method using the insertable measuring instrument according to claim 1, wherein an excavation step of excavating a drilled hole having a curved portion having a small diameter and a small radius of curvature, and inserting the insertable measuring instrument into the drilled hole. And a measurement step of measuring the propulsion direction and / or the inclination angle of the drill hole by the inserted insertion type measuring instrument, and at the time of the insertion step, a curved portion having a small radius of curvature is inserted. An excavation method characterized in that the insertion type measuring instrument bends at the joint and has a shape corresponding to the small radius of curvature of the sharp bend.