JPS6078096A - Positional detection of shield drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] □ [Technical field of the invention] n-a)yzpp++l-4-k -/-) nm
Mrm +rr +-Jr7 7-,・i++,t
This invention relates to a method for detecting the position of a shield excavator that detects the position of a pilot.

[Prior art]

In recent years, with the spread of sewage systems, tunnel construction for burying sewage pipes has been carried out in various places.

In urban areas, in order to avoid the impact of this construction on road traffic, a shield construction method using a shield excavator known as the ``mole method'' or a propulsion method is often used.

In this case, it is necessary to accurately detect the position of the shield excavator in order to correctly excavate the tunnel to the target point.

The position detection of shield tunneling machines was normally carried out using transshift or laser beams, but in recent years, tunnels with small diameters that cannot be accessed by workers are often excavated. If there is a curved construction part, conventional methods cannot be used.For this reason, various proposals have been made, such as using a gyroscope, but accuracy and
There were economic problems and it was not practical.

[Object and structure of the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for detecting the position of a shield excavator, which is highly accurate and economical, and also enables practical position detection.

In order to achieve such an object, the present invention determines the position of the advancing side propulsion tube from the adjacent W, gap data of the advancing tube connection part, and data of the main push jack side propulsion tube, and sequentially performs this operation to advance the advancing side propulsion tube. This method is applied to a pipe to detect the position of a shield tunneling machine at the leading edge of a propulsion pipe. below,
The present invention will be described in detail using drawings showing embodiments.

〔Example〕

FIG. 1 is a horizontal sectional view showing an embodiment of constructing a tunnel using an apparatus to which the method of the present invention is applied. In the figure, 1 is a shield tunneling machine, 21 to 2n are propulsion pipes, 3 is a vertical shaft, 41.42 is a main push jack, and +152 is a direction correction jack that corrects the direction of the shield tunneling machine 1. Each propulsion pipe connection Gap detectors 61 to 6 (2n
-2) is provided, and the connection between the propulsion pipe 2n and the shield excavator 1 is connected to the gap detector "2n, 6 (2)" in the same way.
n-1) is provided.

FIG. 2 is a block diagram of the position detection device, where h to In are signal converters that convert the signals detected by the gap detectors 61 to 6n into a format suitable for signal transmission, and 8 is the signal converter from these signal converters. A signal switcher that switches signals, 9 is an 8/D converter,
104, 10□ is a data transmitter/receiver, 11 is a calculation unit, 12
1 is a data setting section, and 13 is a display section. The signal switch 8 and the converter 9 are operated in response to instructions from the arithmetic unit 11 via the data transmitter/receiver 101 and 102, and the detection signals of the first gap detections 61 to 6n are sequentially converted into digital signals. , are sent to the calculation unit 11. The data setting unit 12 is configured to set the position, orientation, and length of the propulsion pipe 2I adjacent to the shaft 3, and the installation interval data of the gap detector in the pipe radial direction. data transmitter/receiver 102, calculation section 11, data setting section 12, display section 13
is installed at an appropriate position in the building 14 outside the mine or in the shaft 3. Note that the gap detector shown in Fig. 2 is 61 + 62
+63 +”(n I)+6+1L is not shown, but the gap detector 62.64+66168,...62n
are also connected in the same way.

The operation of the device configured as described above is as follows. Shield tunneling machine 1 is Motoshi Jatsuki 41.

It is propelled together with the propulsion tubes 21 to 2n under the pressure of 42, and its propulsion direction is controlled by a direction correction jack "I+52" and an aperture adjusting member (not shown in the figure) attached to the end of the propulsion tube.

When the propulsion tubes are arranged in a straight line, the signals from the gap detectors facing each other in the tube diameter direction are equal, and when the propulsion tubes are arranged out of a straight line, the signals from the gap detectors are equal. different.

In Figure 1, the horizontal direction of the paper is the X coordinate, and the vertical direction is the X coordinate.
As shown in Fig. 3, the coordinates of the center of the propulsion tube 21 are (''+ +, '/1) + the traveling direction is 01, and the coordinates of the center of the propulsion tube 22 are (''2 ' 312) +
Let the traveling direction be θ2. However, the direction of travel is based on the y-axis, and the clockwise angle is taken as a plus. In addition, if the length of each propulsion tube is 61, the installation gap of the gap detector in the pipe radial direction is D1, and the gap data of the gap detector 61.62 is d, 1d2, then the X coordinate of the propulsion tube 22 is x2, the y coordinate is y2, and the orientation θ2. is expressed by the following equation.

r2 ”” rl + 0.5 t(s stone θ tosin
θ )y2='14 + 0-51 (cosθI
” oθ2 ), that is, the center coordinates of the propulsion tube 21 (x
I + , Vl ) and the direction of travel are determined, the coordinates of the propulsion tube 22 are determined based on this point. The position of the shield tunneling machine 1 can be determined by repeating this calculation and sequentially determining the position of the advancing side propulsion pipe.

Fig. 1 shows an example in which gap detectors are placed on a horizontal plane to detect the position of a shield tunneling machine in the horizontal plane. 45 degrees in the circumferential direction of the propulsion tube 2 as shown in FIG.
It can also be arranged at an angle of 135 degrees, 225 degrees, or 315 degrees.

At this time, it is possible to know not only the position of the shield tunneling machine 1 in the horizontal plane but also the position in the vertical plane.

In addition, in Figure 1, gap detectors were installed on all propulsion pipes from shaft 3 to shield excavator 1, but clearance detectors were added to only some propulsion pipes following shield excavator 1, and excavation was started. The position of the shield excavator 10 can also be detected by constantly detecting changes in the position of the shield excavator 1 from time to time and integrating the changes.

As the gap detector, it is preferable to use a straight sliding type potentiometer whose electrical resistance value changes in proportion to the gap interval, an optical type or a magnetic type linear scale, or the like.

Note that the position detection accuracy can also be improved by attaching an inclinometer to the propulsion tube, detecting the pitch angle and roll angle signals of the propulsion tube, and correcting the signal of the gap detector.

〔Effect of the invention〕

As explained above, the method for detecting the position of the shield tunneling machine related to "This Origin" detects the position of the shield tunneling machine by detecting the gap created between adjacent propulsion pipes, so it is difficult for workers to enter. The present invention has the effect that position detection can be performed with high precision and good economic efficiency even in tunnels with small diameters such as those with curved construction parts.

[Brief explanation of drawings]

Fig. 1 is a horizontal sectional view of the part where tunnel excavation is being carried out by applying the present invention, Fig. 2 is a block diagram of the position detection device, Fig. 3 is a diagram for explaining the relationship between each specification, and Fig. 4
FIG. 5 and FIG. 5 are diagrams showing the mounting state of the gap detector. 1... Shield excavator, 2.21~2n... Propulsion pipe, 3... Vertical shaft, 41.42... Main push jack, 51+52... Direction setting jack, 6+6z
~62n...Gap detector, 71~7n...Signal converter, 8...Signal switcher, 9...φ/converter,
, 10. ．． 10□...Data transmitter/receiver, 11...
...Calculating section, 12...Data setting section, 13...Display section. Patent applicant: Mitsui Engineering & Shipbuilding Co., Ltd. Zenitaka Co., Ltd. Agent: Masaki Yamakawa (and one other person) Figure 2A1 vA2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] When excavating a tunnel using a shield excavator installed at the tip of the propulsion tubes arranged in series while pushing them in the advancing direction by a pusher jack, the position of the shield excavator is determined. In the method for detecting the position of a shield tunneling machine, the gap interval that occurs between the opposing pipe walls at the joints of the adjacent propulsion pipes is measured, and this gap interval data is used to determine the position of the advancing side propulsion from the direction of the main thrust jack side propulsion tube. Determine the direction of the tube, and determine the position and direction of the main push jack side propulsion tube. The position of the shield tunneling machine is detected by determining the position of the traveling side propulsion pipe from the direction of the traveling side propulsion pipe and sequentially adjusting the position of the traveling side propulsion pipe based on the determined propulsion pipe position. Location detection method.