JPH0626298A - Indication method for tunnel drilling position - Google Patents

Abstract

PURPOSE:To enable a tunnel drilling section at a facing to be indicated accurately and in a short time. CONSTITUTION:A TV camera 5 for photographing a facing 3, and a plurality of laser beam transmitters 6 emitting laser beams in parallel to the axial line of a tunnel, are arranged in the tunnel at the rear side of the facing 3. The image of the facing 3 photographed with the camera 5 is displayed on a monitor screen 8. Also, the drilling position of the facing 3 is displayed on the screen 8 on the basis of a positional relationship between an established tunnel drilling section and each laser beam luminous point, with reference to the facing irradiation points 10a to 10b of the laser beams photographed with the camera 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to means for indicating an excavation cross section or a drilling position in a face of a tunnel.

[0002]

2. Description of the Related Art In a tunnel excavator, it is necessary to accurately instruct an operator of a working machine that excavates or drills a face with a drilling position or a drilling position in order to perform the drilling accurately in accordance with a predetermined cross section and direction. There is.

Conventionally, such an instruction indicates to which position on the face each portion of the tunnel cross section corresponds to the tape or level,
This was done by surveying with a transit or the like and manually marking the obtained position directly on the face.

[0004]

However, it is difficult to perform accurate marking by this method, because the distance measurement by tape and the marking by hand are prone to errors and mistakes, and further, these errors become larger due to the unevenness and inclination of the face. It was Further, since the face is directly marked, there is a problem that the work is dangerous.

On the other hand, in recent years, a method of performing three-dimensional distance measurement using an optical distance measuring device or the like and irradiating the face with the position of the main part of excavation cross section and the drilling position with a marking device using laser light Has also been done.

However, this method has the problems that a large-scale surveying device is required and that the time required for surveying and calculation for positioning in three dimensions becomes long.

The present invention has been made to solve the above problems, and it is an object of the present invention to accurately indicate the excavated cross section and the drilled position of a tunnel in a face in a short time.

[0008]

According to the present invention, a television camera for photographing a face and a plurality of laser beam emitters for emitting a laser beam parallel to an axis of the tunnel are arranged in a tunnel behind the face, and a television camera is provided. The face of the face that was taken by the TV is displayed on the monitor TV, and the position of the face of the face of the laser beam taken by the TV camera is used as a reference to determine the excavation position of the face based on the positional relationship between the tunnel cross section and the emission point of each laser beam I am trying to display it above.

[0009]

[Operation] Since the laser beam is emitted parallel to the axis of the tunnel, the positional relationship in the tunnel crossing direction between the laser beam facet irradiation point and each part of the surrounding tunnel cross section is determined by the laser beam emission point and the tunnel at that point. It is equal to the positional relationship with the excavated section.

Since the positional relationship between the emission point of the laser beam and the tunnel excavation cross section at that point is known, the tunnel excavation cross section should be displayed on the monitor TV with the face irradiation point of the laser beam projected on the monitor TV as a reference. You can

An operator of a work machine for excavating a face can excavate a tunnel with high accuracy by performing excavation so as to overlap a cross section indicated on a monitor television.

[0012]

1 to 4 show an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a tunnel excavation surface, and 2 is a drilling machine provided with a bit 4 for drilling a face 3.

A television camera 5 is fixed to the wall surface of the tunnel behind the face 3 and is connected by a signal cable to a microcomputer 7 also arranged in the tunnel.

Further, three laser beam emitters 6 are fixed to the wall surface of the tunnel so that the laser beams are parallel to the central axis of the tunnel.

The microcomputer 7 is connected to a monitor television 8 mounted on the drilling machine 2 via a signal cable. The monitor television 8 displays the image of the face 3 photographed by the television camera 5 by applying image processing by the microcomputer 7. It is also possible to transmit an image from the microcomputer 7 to the monitor television 8 via radio waves.

Inside the microcomputer 7, the relationship between the tunnel excavation cross section and the light emitting position of the laser beam emitter 6 is preset as two-dimensional coordinate values developed along the tunnel cross section. Furthermore, the relationship between the tunnel excavation cross section and the drilling position is preset as the same two-dimensional coordinate value.

The microcomputer 7 receives the laser beam irradiation point 10a on the image based on the image of the face 3 as shown in FIG.
With 10 to 10c as the reference position, the tunnel excavation cross section 12 and the drilling position 9 are displayed on the image from the above two-dimensional coordinate values so that the scale is the same as the reference position.

Next, the operation will be described. When the face 3 is drilled, the laser beam emitting device 6 emits the laser beam.
To irradiate. The image of the face 3 is captured by the television camera 5, and the image is input to the microcomputer 7 through a signal cable.

In this case, even if the cutting face 3 is inclined as shown in FIG. 1 or the cutting face 3 has irregularities, each laser beam emitted by the laser beam emitter 6 becomes the center line of the tunnel excavation surface 1. TV camera 5 because it is parallel
Laser beam irradiation points 10a to 10 on the image captured by
c corresponds to the light emitting position of the laser beam emitting device 6 set in the microcomputer 7.

Therefore, the microcomputer 7 refers to the irradiation points 10a to 10c on the image as a reference, and determines the tunnel excavation cross section from the two-dimensional coordinate value indicating the positional relationship between the laser beam emitter 6 and the tunnel excavation surface 1 set inside. The coordinates of 12 are calculated, and the tunnel excavation section 12 is written in the image based on the calculation result. Drilling position 9 set inside
Based on the two-dimensional coordinate value of, the drilling position 9 is marked on the image and output to the monitor TV 8.

The operator of the drilling machine 2 adjusts the position of the bit 4 while watching the monitor TV 8 so that the tip of the bit 4 overlaps the drilling position 9 displayed on the monitor TV 8 as shown in FIG. The bit 4 is advanced toward 3 to start drilling at the point 13 where the bit 4 reaches the face 3.

In this way, drilling can be performed at an accurate position regardless of the unevenness or inclination of the face 3.

Further, in the scooping work for removing the bedrock left on the face after the blasting work, if the face 3 is excavated so that the tip of the excavator overlaps the tunnel excavation cross section 12 shown in the image of the monitor TV 8, Excavation can be performed with high precision as in the drilling work.

Further, by disposing the monitor television 8 behind the tunnel, the drilling machine 2 can be operated remotely.

Even in the excavation of the curved portion of the tunnel, each laser beam emitting device 6 and its actual irradiation point 11
By measuring the distances a to 11c and moving and displaying the tunnel excavation surface 12 and each drilling position 9 in the image on the screen of the monitor TV 8 according to these measurement distances, the face 3 is cut. Accurate drilling and excavation can be performed without direct marking of.

The fixed position of the TV camera 5 is the face 3
The position is not limited to a specific position as long as it can capture the entire image.

[0028]

As described above, according to the present invention, a television camera and a plurality of laser beam emitters for emitting a laser beam in parallel with the axis of the tunnel are arranged in the tunnel behind the face and projected on the monitor television. The excavation position of the cutting face is displayed on the monitor TV based on the face irradiation position of the laser beam, the emission position of each laser beam, and the preset excavation cross section of the tunnel. The tunnel can be accurately excavated by excavating the face according to the position.

Further, since it is not necessary to measure the irradiation distance of the laser beam, no special measuring instrument is required.

Therefore, the tunnel excavation position can be easily and efficiently instructed.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a tunnel excavation part showing an embodiment of the present invention.

FIG. 2 is an image of a face shot by a television camera.

FIG. 3 is an image of a face projected on a monitor TV.

FIG. 4 is an image of drilling work displayed on a monitor TV.

[Explanation of symbols]

 1 Tunnel excavation surface 2 Drilling machine 3 Face 5 TV camera 6 Laser beam emitter 7 Microcomputer 8 Monitor TV 10a-10c Face irradiation point (on image)

Claims (1)

[Claims] 1. A television camera for photographing a face in a tunnel behind the face and a plurality of laser beam emitters for emitting a laser beam parallel to an axis of the tunnel are arranged, and the face taken by the television camera is used as a monitor TV. In addition to displaying, the excavation position of the cutting face is displayed on this monitor TV from the positional relationship between the tunnel excavation cross section and the emission point of each laser beam, with the position of the irradiation point of the laser beam taken by the TV camera as a reference. How to indicate the tunnel excavation position.