JPH0875465A - Excavation confirmation survey method for shield machine - Google Patents

Abstract

PURPOSE: To save the power for and automatize the excavation confirming and measuring of a shield machine. CONSTITUTION: An opaque semi-reflecting screen 5 is set near to the middle of the rear equipment 3 of a shield machine 1, and a total station 6 is set in the end part. The laser beam emitted from a visual light laser range finding instrument 4 fixed to the shield machine 1 is projected onto an opaque semi- reflecting screen 5 in the rear equipment 3 through the clearance between the shield machine 1 and the rear equipment 3, and the total station 6 collimates the laser beam projected point on the opaque semi-reflecting screen 5 to measure the position of the shield machine 1 while it collimates two points 7, 7 having known coordinates in the rear to measure its own position.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a shield construction method,
A shield machine that is applied to a confirmation survey to measure the current position and attitude of the shield machine in order to constantly monitor the excavation direction of the shield machine and to correct the trajectory before the deviation from the planned line is large. This is related to the surveying method of excavation confirmation.

[0002]

2. Description of the Related Art In the conventional shield construction method, the excavation is stopped once every several rings of the shield machine have been excavated, the total station is installed and surveyed based on the survey points extended in the tunnel. I aimed the machine directly and confirmed its position and attitude.

Recently, the shield machine itself has been equipped with a system for recognizing the excavation locus, but the reliability is not sufficient and the frequency is low, but the conventional confirmation survey is performed. It is being appreciated.

[0004]

However, this survey requires manpower and the work is performed in the mine. Especially, since several tens of meters before the shield machine are surveyed using the narrow space of the rear equipment, You are forced to work hard. Also,
This surveying work cannot be done at the same time as the excavation work,
There was a demand for labor saving or unmanned work because the dugout work was stopped or the surveyor was forced to work overtime.

For this reason, there is no problem if the shield machine can be directly collimated at the total station with known coordinates, which is installed from the rear of the shield machine while avoiding the positions of the vehicle passages and pipes in the mine. Obstructs the field of view, and direct collimation is impossible. Therefore, if one point on the line parallel to the shield machine axis appears near the middle of the rear equipment, know the relative positional relationship with the shield machine body at this point, and if this point can be collimated with a total station installed at a known coordinate point,
The position can be known from the attitude data of the shield machine.

The present invention has been proposed in view of such circumstances, and an object of the present invention is to provide an unmanned and automated method for surveying and confirming the excavation of a shield machine.

[0007]

The present invention has been proposed in order to achieve the above-mentioned objectives of labor saving and unmanned surveying, and a semi-transmissive semi-reflective screen is installed near the middle of the equipment behind the shield machine. At the same time, a total station is installed at the rearmost part, and the laser light emitted from the visible light laser range finder fixed to the shield machine is applied to the semi-transmissive semi-reflective screen in the rear machine through the gap between the shield machine and the rear machine. Then, the total station collimates two points whose coordinates are known at the rear to measure its own position, and collimates the laser light irradiation point on the semi-transmissive semi-reflective screen to measure the position of the shield machine. It is the one.

[0008]

Since the present invention is constructed as described above,
By irradiating the laser light emitted from the visible light laser range finder fixed to the shield machine to the semi-transmissive semi-reflective screen installed near the middle of the rear equipment through the gap between the shield machine rear equipment and the segment, Measure the distance between the shield machine and the screen. At this time, since the laser spot projected on the screen emerges on the opposite side of the screen, this point is collimated by a total station installed at the rearmost part of the rear equipment, and at each time, two points with rearward known coordinates are collated. And the position of the laser spot on the screen can be obtained by measuring the self position of the total station.

The position of the shield machine is calculated from the distance between the screen and the shield machine recognized as described above, and the data of the gyro compass, pitching meter, and rolling meter mounted on the shield machine.

[0010]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a vertical cross-sectional view of the face of a shield tunnel under excavation, in which 1 is a shield machine, 2 is a tunnel, and 3 is rear equipment, and a visible light laser range finder 4 is fixed to the shield machine 1. Near the middle of the rear equipment 3, a semi-transmissive semi-reflective screen 5 made of, for example, a vinyl chloride PVC sheet and a vinyl chloride half mirror sheet (film-like) bonded together is disposed, and a total station is provided at the rear end of the rear equipment. 6 is installed. Further, a point 7 whose coordinates are known is installed behind the total station 6 and collimated by the total station 6 so that the self position of the total station can be confirmed.

Since the illustrated embodiment is constructed as described above, the laser light emitted from the visible light laser range finder 4 passes through the gap between the shield machine 1 and the rear equipment 3 and near the middle of the rear equipment 3. The distance between the screen 5 and the shield machine 1 is measured by irradiating the semi-transmissive / semi-reflective screen 5 installed on the screen. At this time, since the laser spot projected on the screen 5 emerges on the opposite surface of the semi-transmissive semi-reflective screen 5, this point should be considered.
The position coordinates of the laser spot on the screen 5 are obtained by collimating at a total station 6 installed at the rear end of the screen. Each time, the total station 6 collimates the two points 7 and 7 whose coordinates are known to measure the self position and collimates the laser light irradiation point on the screen 5. The distance between the shield machine 1 and the screen 5 thus obtained, and the data of the instruments such as the gyro compass, the pitching meter, the rolling meter, etc., which are installed in the shield machine 1, do not use the attitude data of the shield machine 1. The position and orientation of the shield machine 1 are calculated.

A CCD is installed in the total station 6.
It is equipped with a camera, and the information is processed by the image from the camera to confirm and measure while looking at the monitor screen from outside the tunnel. Further, the data of the visible light laser range finder 4 and the total station 6 can be constantly communicated to the operation room outside the tunnel, and the position and posture of the shield machine 1 can be recognized by remote collimation of the total station at any time.

If each laser spot can be collimated by the total station 6 by installing a plurality of visible light laser rangefinders 4 fixed to the shield machine, the same attitude data of the shield machine 1 is not used. The position and orientation of the shield machine 1 can be calculated. Furthermore, the visible light laser range finder 4 and the total station 6
Is constantly communicated to the operation room outside the tunnel, and the position and orientation of the shield machine 1 can be recognized by remote collimation of the total station 6 at any time, and the state of shield advancement can be confirmed remotely.

[0014]

According to the present invention, as described above, in the shield construction method, the laser light emitted from the visible light laser range finder fixed to the shield machine is passed through the gap between the shield machine rear equipment and the segment to the middle of the rear equipment. It irradiates the semi-transmissive semi-reflective screen installed at the position, and the laser light irradiation point on the screen is collimated by the total station installed at the end of the rear equipment at each of the two coordinates-known rear points. By collimating the laser irradiation point on the screen while measuring the self position, the position of the shield machine is confirmed, the shield excavation situation is automatically measured, and the surveying and excavation are performed in parallel to save labor. It can be achieved.

Since the semi-transmissive semi-reflective screen to which the laser light from the visible light laser range finder is irradiated is arranged in the middle of the rear equipment, it is possible to cope with a steeper curved shield tunnel.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an implementation state of an embodiment of a method for confirming and excavating a shield machine according to the present invention.

[Explanation of symbols]

 1 shield machine 2 tunnel 3 rear equipment 4 visible light laser range finder 5 semi-transmissive semi-reflective screen 6 total station 7 known point of coordinates

Claims (1)

[Claims] 1. A semi-transmissive / semi-reflective screen is installed near the middle of the equipment behind the shield machine, and a total station is installed at the rear of the shield machine so that the laser light emitted from a visible light laser range finder fixed to the shield machine is installed. The semi-transmissive semi-reflective screen in the rear equipment is irradiated through the gap between the shield machine and the rear equipment, and the total station collimates two points of known rear coordinates each time and measures the self-position while measuring the self-position. A method for surveying and confirming the progress of a shield machine, which comprises measuring the position of the shield machine by collimating the laser light irradiation point on the semi-reflective screen.