JPH0410972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for measuring a tunnel cross section when excavating a tunnel.

(Prior Art) and (Problems to be Solved by the Invention) In the past, measuring the cross section of a tunnel required extensive surveying using various surveying instruments, which required a lot of manpower and time.

(Means for Solving the Problems) The present invention has been proposed to solve these problems, and includes setting the laser beam of a laser beam projector disposed on the tunnel entrance side at a predetermined position. a laser beam direction controller; a first microcomputer that has information on the center position of a cross section of a tunnel excavation section and controls the laser beam direction controller; and a cross section measuring instrument body disposed within the tunnel excavation cross section. and a cross-sectional measuring device including a sonar for measuring the distance between the main body and the excavation cross section, which is equipped on the main body, and a second microcomputer that controls the sonar of the measuring device. The first microcomputer receives instructions from the microcomputer, and projects a laser beam in a predetermined direction of the cross-section measuring device via the laser beam direction controller, and also projects the sonar in the X and Y directions with respect to the center position of the designed excavation cross-section. calculates the eccentric position of and sends information on the same position to the second microcomputer, and the second microcomputer determines the excavation cross-sectional shape in conjunction with the cross-sectional shape information determined by the sonar. A tunnel cross-section measuring device characterized in that it is configured as follows. This is related to.

(Function) Since the present invention is configured as described above,
First, a cross-section measuring instrument equipped with sonar is placed approximately at the center of the excavated cross-section, and then input is input to the second microcomputer to project the sonar to a predetermined position. The second microcomputer instructs the first microcomputer, which controls the laser beam direction controller.

Thus, once the laser beam is guided to the predetermined position of the cross section measuring device, the first microcomputer is instructed to calculate the sonar position.

At this time, the first microcomputer has information on the center position of the designed cross section of the tunnel in advance, and determines the center of the designed cross section using the distance between the cross section position to be measured and the laser beam direction controller, and the direction of the laser beam. Find the eccentric position of the sonar in the X and Y directions relative to the position.

Furthermore, when a second microcomputer receives information on the position of this sonar from the first microcomputer, the cross-sectional shape of the tunnel is determined by combining it with the information on the cross-sectional shape determined by the sonar. be.

(Effects of the Invention) According to the present invention, the cross-sectional shape of the tunnel can be easily determined, and by measuring immediately after excavation and comparing it with the designed cross-section, it is possible to determine whether over-excavation or protrusion within the excavated cross-section is possible. You can learn about the existence of rocks.

As a result, the present invention helps to reduce excessive digging, which in turn reduces unnecessary concrete placement, contributing to energy and resource savings.

(Embodiments) The present invention will be described below with reference to illustrated embodiments.
Reference numeral 1 denotes a laser beam direction controller built into a laser beam projector disposed on the entrance side of tunnel A. Examples of the laser beam projector equipped with a laser beam direction controller include a laser beam projector with an optical device such as a mirror for changing the direction of the laser beam, and the beam direction controller proposed by the present inventor in Utility Application No. 1983-76397. used. 2 is a first microcomputer that controls the controller 1;

Reference numeral 3 denotes a cross-section measuring instrument having a sonar 4 configured to determine the cross-sectional shape by measuring the distance to the tunnel excavation surface B using ultrasonic waves, and the sonar 4 is controlled by a second microcomputer 5. It is becoming more and more like this.

In addition, the first microcomputer 2 and the second
The microcomputer 5 is communicated with via wireless.

After installing the sonar 4 of the cross-section measuring device 3 at approximately the center of the tunnel cross-section, the worker enters input into the second microcomputer 5 in order to project the laser beam to a predetermined position on the cross-sectional measuring device 3. Let's do it. At this time, the second microcomputer 5
instructs the first microcomputer 2 via wireless to change the direction of the laser beam.

In this way, after the laser beam L is guided to a predetermined position of the cross-section measuring device 3 by the laser beam direction controller 1 controlled by the first microcomputer 2, when input to end the guidance is made, the first microcomputer 2 receives instructions and sonar 4
Calculate the position of.

At this time, the first microcomputer 2 has in advance information on the design cross-sectional center position O of the tunnel, and determines the cross-sectional position to be measured, the distance l from the laser beam direction controller 1, and the direction of the laser beam L. , Sonar 4 with respect to the design cross-section center position O
Find the eccentric positions dX and dY in the X and Y directions.

In this way, when the second microcomputer 5 receives the position information (dX, dY) of the sonar 4 from the first microcomputer 2, the second microcomputer 5
is processed together with information on the cross-sectional shape determined by the sonar 4 to determine the cross-sectional shape of the tunnel excavated.

Based on the information finally obtained in this way, the cross-sectional shape is displayed on a monitor television or plotter, and the data is stored on a diskette.

In this way, according to the above-mentioned embodiment, it is possible to easily obtain the cross-sectional shape of the tunnel, and by measuring immediately after excavation and comparing it with the measured cross-section, it is possible to determine the cross-sectional shape of the tunnel during over-excavation and by comparing it with the measured cross-section. It is possible to know the existence of rocks with large diameters and large-diameter gravel.

Therefore, the above-mentioned embodiments are useful in reducing over-excavation, which in turn reduces unnecessary concrete pouring, and is also useful in saving energy and resources.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a vertical side view showing an embodiment of a tunnel cross-section measuring device according to the present invention, and FIG. 2 is a vertical front view. DESCRIPTION OF SYMBOLS 1... Laser beam direction controller, 2... First microcomputer, 3... Cross section measuring device, 4...
...Sonar, 5...Second microcomputer.

Claims (1)

[Claims] 1. A laser beam direction controller that sets the laser beam of a laser beam projector disposed on the tunnel entrance side to a predetermined position, and a laser beam direction controller that has information on the center position of the designed excavation cross section of the tunnel and that controls the laser beam direction controller. 1, a cross-section measuring instrument body disposed within the tunnel excavation cross-section, and a cross-section measuring instrument comprising a distance measuring sonar installed between the main body and the tunnel excavation cross-section; A second microcomputer controls the sonar of the measuring instrument, and the first microcomputer, which receives instructions from the second microcomputer, directs the laser beam to a predetermined location of the cross-sectional measuring instrument via the laser beam direction controller. At the same time, the eccentric position of the sonar in the X and Y directions with respect to the center position of the designed excavation cross section is calculated, and information on the same position is sent to the second microcomputer, and the second microcomputer transmits the information to the sonar. What is claimed is: 1. A tunnel cross-sectional measuring device, characterized in that it is configured to determine an excavated cross-sectional shape in conjunction with information on the cross-sectional shape thus obtained.