JPH09291785A - Detecting method for fore end position of tunnel boring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detecting method in which the fore end position of a tunnel boring machine is detected simply, quickly, and accurately by using an existing device without requiring previous data collection or a troublesome analysis work, and the fore end position of the tunnel boring machine can be accurately detected without being largely influenced even when the shape of a cutter face clanged. SOLUTION: A plurality of data carriers 15 are fitted to the cutter face 14 of a shield machine, a tunnel boring machine, or the like, so that the respective loci of the data carriers 15 draw concentric circles at regular intervals in the radial direction when the cutter face 14 is driven to rotate, and when the tunnel boring machine 10 reaches the detected position, a tunnel boring machine 11 forms boring hole 18 by drilling toward the cutter face 14, and insertedly arranges an antenna 16 for reading information from the data carriers 15. In addition to rotationally moving the cutter face 14, the data carriers 15 are specified so as to read the information, and hence the fore end position of the cutter face 14 of detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a tip position of a tunnel excavating machine, and more particularly to a tip of a tunnel excavating machine such as a shield machine or a tunnel boring machine having a cutter face that is rotationally driven on the tip surface. The present invention relates to a detection method for detecting a position.

[0002]

2. Description of the Related Art In tunnel construction, it is necessary to accurately allow a tunnel under excavation to reach an underground junction between tunnels or a reaching base. And, especially when constructing a tunnel using a tunnel excavating machine such as a shield machine or a tunnel boring machine that has a cutter face that is driven to rotate at the tip surface, these are in a state in which the face face is blocked. Since it is a machine that excavates at, it is not easy to manage its position, and if the tunnel excavating machine does not accurately reach the docking position for the underground junction or vertical shaft, such errors will be repaired from ground conditions etc. A lot of unnecessary work is required for the widening work and the reinforcing work, and it may be difficult to remove the tunnel excavating machine.

Therefore, various methods have been proposed for accurately reaching these tunnel excavating machines to reaching bases such as underground joints and shafts. For example, vertical boring from the ground before such a docking position. A method is generally adopted in which the tunnel excavating machine reaches a desired arrival position by performing accurate positioning to correct the trajectory based on the boring position.

On the other hand, in such a method by vertical boring, when the tunnel to be installed is located at a considerable depth in the ground or when it is located on the ground below the water surface, the position is accurately measured. Therefore, even in such a case, as a method of detecting the tip position of the tunnel excavating machine with high precision and easily by a relatively simple means, for example, Japanese Patent Application Laid-Open No. 61- 254793
The detection method described in the publication is proposed.

That is, according to the detection method of this publication,
For example, after stopping the shield machine at a position where the excavation track can be corrected, horizontal boring is performed from the other shield machine or vertical shaft to be docked to this shield machine, and the tip of this boring hole is The magnetic sensor provided detects the disturbance of the magnetic field by the bits, slit holes, magnetic pieces, etc., provided on the face plate, that is, the cutter face, and searches the face plate shape of the shield machine, The position of the cutter face is detected by comparing with the collected data.

According to this detection method, the magnetic sensor measures the magnetic change of the cutter face of the shield machine to identify its position.
It is said that the position of the shield machine can be detected with high accuracy even in the construction site where the structure is relatively simple and vertical boring cannot be performed, and the cost can be significantly reduced compared to the conventional one. It has advantages.

[0007]

However, according to the method for detecting the position of the cutter face by the magnetic sensor, while having the advantages as described above, the method for collecting the data for comparison with the exploration result is required. It may take a long time, and the shape of the cutter face may change due to wear or damage during excavation work, making it difficult to compare with the data collected in advance. Further, there are cases where a lot of labor and time are spent on the analysis work.

Therefore, the present invention has been made in view of such a conventional problem, and it is possible to simply, quickly, and easily by using an existing device without the need of collecting data in advance and complicated analysis work. It is possible to detect the tip position of the tunnel excavating machine with high accuracy, and even if the shape of the cutter face changes, the tip position of the tunnel excavating machine can be detected accurately without being greatly affected. An object of the present invention is to provide a method for detecting the tip position of a machine.

[0009]

The present invention has been made to achieve such an object, and its gist is to provide a cutter face, such as a shield machine or a tunnel boring machine, which is rotationally driven at the tip surface. A method for detecting the tip position of a provided tunnel excavating machine, wherein a plurality of data carriers are provided on the cutter face, and when the cutter face is rotationally driven, each locus of the data carrier is at a predetermined interval in a radial direction. In order to draw a concentric circle with a circle, the cutter face is attached with the distance from the center of rotation being different, and when the tip end face of the tunnel excavating machine reaches the detection position, the other cutter face is opposed. Boring holes are formed from the working space such as a tunnel or a vertical shaft toward the cutter face, and the boring holes are formed. An antenna for reading information from the data carrier is inserted into the ring hole, the antenna is arranged in the vicinity of the cutter face, the cutter face is rotated, and in the vicinity of the arrangement position of the antenna. In the method of detecting the tip position of the tunnel excavating machine, the tip position of the cutter face is detected by identifying the data carrier passing through the data carrier and reading the information.

Further, according to the detecting method of the present invention, the plurality of data carriers attached to the cutter face are arranged so that at least adjacent data carriers that draw concentric circles are not linearly arranged in the radial direction. It is preferable that they are arranged at a predetermined angular interval in the rotation direction of.

Further, according to the method for detecting the tip position of the tunnel excavating machine of the present invention, information is provided between the data carrier attached to the cutter face and the antenna arranged near the cutter face via the boring hole. The position of the cutter face, that is, the tip surface of the tunnel excavating machine is detected by transmitting

Here, the term "data carrier" refers to an ID technique related to a technique of recording and recognizing attribute information of an object for use in daily activities, together with a reader / writer that transmits and receives a transmission medium to and from the data carrier. This refers to an information carrier that can read or write data in a contactless manner and constitutes a system (ID system), and is also called an ID tag, transponder, or transponder, and specifically includes an ID card and the like.

On the other hand, the antenna, which constitutes the reader / writer and transmits / receives a transmission medium to / from a data carrier, is appropriately connected to a host device such as a computer or a programmable controller and is operated by these commands. ,
Data is read from or written to a data carrier in a non-contact state via an information transmission medium such as a microwave or a low frequency.

Further, according to the detecting method of the present invention, since the antenna is arranged in the vicinity of the cutter face, for example, when the cutter face is rotated, any one or more of the plurality of data carriers attached to the cutter face are provided. The data carrier of will pass the vicinity of the antenna along the circular locus. At this time, if the information carried by this data carrier is read by the antenna and the rotation angle of the cutter face is measured, Since the relative position of the tip of the boring hole with respect to is known, this allows the position of the cutter face, that is, the tip surface of the tunnel boring machine, to be accurately detected with reference to the tip position of the boring hole.

Further, the antenna constituting the data carrier system has directivity, and the input / output of a reader unit or the like properly attached to this antenna is adjusted to control the directivity, and a specific signal passing near the antenna is specified. By reading only the information from the data carrier,
It is possible to easily prevent the information of a plurality of data carriers from being redundantly read by the antenna.

Further, if a large number of data carriers are attached to the cutter face in a state in which the distance from the center of rotation of the cutter face, that is, the difference in the radius of gyration is made dense so that the concentric circular loci due to the rotation of the data carrier are closely drawn. , It is possible to detect the position more accurately, but in order to avoid the information of multiple data carriers from being duplicated and read by the antenna due to the close placement of the data carriers, at least adjacent concentric circles should be set. In order to prevent the drawn data carriers from being linearly arranged in the radial direction, they are arranged at a predetermined angular interval in the rotation direction of the cutter face.

The tip position of the boring hole can be accurately measured from a working space such as a tunnel shaft or a vertical shaft where the boring hole is drilled by using a conventional surveying method using a total station or the like. .

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments, ie, embodiments of the present invention will be described below in detail with reference to the accompanying drawings. According to this embodiment, as an example, the shield tunnels 12, 13 formed by excavation by the pair of shield excavators 10, 11 are accurately joined in the ground to integrate and integrate the shield tunnels 12, 13. In order to construct a tunnel, the method for detecting the tip position of the tunnel excavating machine of the present invention is adopted.

That is, in this embodiment, in order to accurately combine the shield tunnels 12 and 13 at the joints in the ground, the tip end surface of one shield machine 10 is docked to the other shield machine 11 to which it is docked. The position of the tip surface of one shield machine 10 with respect to the other shield machine 11 is detected by the detection method of this embodiment for the purpose of accurately guiding and reaching the tip surface of the machine.

According to the detection method of this embodiment,
Prior to the excavation work of the tunnel 12 by the shield machine 10 on one side, a face plate type cutter face 14 which is located at the tip end surface of the shield machine 10 and cuts a face is provided with an ID tag 15 as a data carrier. Install multiple.

Here, the ID tag 15 is an information carrier which constitutes an ID system together with an antenna 16 which will be described later and which can read or write data in a non-contact state, such as a card type, a glass sealed type or a wedge type. Various known types can be used. The ID tag 15 is preferably a battery-less type so that it can be used even after a long period of excavation work by the shield machine 10.

Further, as shown in FIG. 2, these ID tags 15 are No. 1 and No. 2 at positions so as to avoid the slit-shaped opening 17 over the entire face plate 26 constituting the cutter face 14. 1 to No. It is installed in 38 places up to 38.

Each of these ID tags 15 is shown in FIG.
As shown in (a) and (b), a transparent abrasion-resistant resin 2
7 is attached to the face plate 26 with the front opening portion closed.
A solid cylindrical resin block 29 in which the ID tag 15 is embedded is fitted and inserted into the mounting hole 28 formed in the opening, and after positioning, the resin block 29 is fixed with a paint lock or the like. By covering it, it will be firmly attached. That is, according to the ID tag 15 attached in this manner, the ID tag 15 can be easily transmitted through the ground and the abrasion resistant resin 27 or the resin forming the resin block 29 through a transmission medium such as low frequency or microwave. ,
Information can be easily exchanged with the antenna 16.

In FIGS. 2 and 3, a reference numeral 20 indicates a fish tail portion located at the center of the cutter face 14, a reference numeral 21 indicates a cutter bit, a reference numeral 22 indicates a preceding bit, and a reference numeral 23 indicates an outermost circumference. It is the leading bit.

On the other hand, FIG. 4 is an explanatory diagram for explaining in more detail the disposition positions of the ID tag 15 at 38 places with respect to the cutter face 14 shown in FIG. Here, the spoke No. in FIG. The column of No. constituting the cutter face 14 of FIG. 1 to No. 8 corresponds to each spoke, and the numerical value shown in the left column of the figure shows the distance from the center of the cutter face 14 with the lower end being 500 mm, that is, the mounting radius. Further, the hatched portion in the figure indicates the attachment position of the preceding bit 22 in each spoke, and the circled portion in the figure indicates the attachment position of the ID tag 15 in each spoke and its No. Are respectively shown. Therefore, according to FIG. In the 1-spoke, the preceding bit 22 is installed at the positions of the mounting radii 570 mm, 1110 mm, and 1350 mm, and the mounting radii 740 mm, 900 mm,
N at the positions of 1,060 mm, 1,240 mm, and 1,400 mm
o. 37, No. 30, no. 22, no. 13, N
o. 5 ID tags 15 are attached to each.

As shown in FIG. 4, the mounting radius is 710 mm (No. 38) to 1480 mm (No. 1).
In the range of, the ID tags 15 at 38 places are 20 mm to 30
While making the attachment radii different at intervals of mm and preventing consecutive ID tags 15 from being attached in the same spoke in the radial direction,
The numbers are arranged in order from the inner side to the outer side.

Next, in this way, the cutter face 1
The tunnel excavator 10 having a plurality of ID tags 15 attached to 4 performs tunnel excavation work toward the joint. However, when the shield excavator 10 approaches the joint, A distance of, for example, about 50 m is left as a distance capable of correcting the trajectory, and the shield machine 10 is temporarily stopped with this position as a detection position. Then, the work of detecting the position of the tip of the shield machine 10 is performed using the inside of the other shield machine 11 that has reached this joint portion in advance as the working space.

That is, in order to perform such a detection operation, as shown in FIG. 1, first, a boring hole 18 is bored from the inside of the other shield excavator 11 toward the cutter face 14 at the tip of the shield excavator 10. The antenna 16 for reading information from the ID tag 15 is inserted and arranged in the boring hole 18 while being formed.

Here, the boring operation of the boring hole 18 is performed, for example, by using an existing boring device from the boring opening formed in the cutter face 25 of the other shield boring machine 11 using the existing boring machine. It can be easily carried out to a position close to the cutter face 14, and an antenna 16 is inserted into the tip portion of the boring hole 18 thus formed to form a hole near the cutter face 14, For example, it is arranged at a position about 20 cm away from the cutter face 14.

Inside the borehole 18, a reader unit 19 is arranged after the arranged antenna 16 and is connected to the reader unit 19 inside the tunnel 13 formed by the other shield machine 11. Control of the reader unit 19, collection and processing of the obtained information,
A personal computer 30 for outputting data is arranged.

The position of the tip of the boring hole 18 in which the antenna 16 is arranged is determined by the shield machine 11 on the other side.
Precise measurement is performed in advance by a surveying method using a known device such as a transit, a gyro compass, and a total station.

When the antenna 16, the reader unit 19, the personal computer 30 and the like are arranged in this manner, the cutter face 14 of the shield machine 10 is rotated at a rotation speed of, for example, about one rotation per minute, and The reader unit 19 is operated to read information from the ID tag 15 attached to the cutter face 14 via the antenna 16.

That is, when the cutter face 14 is rotated, the ID tags 15 at 38 places arranged with the mounting radii changed at intervals of 20 mm to 30 mm are 20 mm.
The reader unit is rotated while drawing concentric circles with a close interval of ˜30 mm, which causes either one or two ID tags 15 to pass through the position closest to the antenna 16. Adjust the input and output from 19 and ID tag 15 at one place that passes the nearest position
Is specified, and information is obtained only from the specified ID tag 15.

Here, the ID tag 15 carries previously written position information, for example, information such as the distance from the center of the cutter face 14 or the like, upon receiving an output from the reader unit 19 or the ID tag 15. The position of the cutter face 14 can be easily detected by itself emitting an information transmission medium such as a microwave or a low frequency and picking up the antenna 16 and reading the information.

That is, the information of the ID tag 15 read by the antenna 16 or the reader unit 19 is transmitted to the personal computer 30 installed on the other shield machine 11, and at the one shield machine 10 concerned. The measured information such as the rotation angle of the cutter face 14 at the moment when the information of the ID tag 15 is read is transmitted to the personal computer 30 through a line or the like arranged on the ground. Through the arithmetic processing, the relative position of the tip of the boring hole 18 with respect to the cutter face 14 is accurately detected.

The information on the tip position of the boring hole 18 with respect to the other shield machine 11 is accurately measured by the above-mentioned known surveying method and stored in the personal computer 30. Therefore, these information are also calculated. By processing, the position of the tip of the shield machine 10 with respect to the other shield machine 11 can be detected easily, quickly and easily.

According to this embodiment, the ID tag 1
As described above, 5 is attached to the cutter face in a state in which the intervals of the attachment radii, that is, the radii of rotation are made close so that the concentric circular loci due to the rotation of the cutter face 14 are closely drawn. ID of one place
By specifying the tag 15 and obtaining the position information, the position of the tip of the shield machine 10 can be accurately detected. Also, these ID tags 15
Since at least adjacent ID tags 15 that depict concentric circles are not arranged on the same spoke, the spokes are made different and are arranged at predetermined angular intervals in the rotation direction of the cutter face 14, so that a plurality of ID tags 15 are provided. Therefore, it is possible to easily prevent the information of 1 from being read by the antenna 16 in duplicate.

In this way, the other shield machine 1
When the position of the tip of the shield machine 10 with respect to 1 is detected, the shield is re-shielded while correcting its orbit so that the shield machine 10 is accurately combined with the other shield machine 11 at the joint portion. Excavator 10
However, if the shield machine 10 is appropriately stopped and the same detection work is repeated so that the position of the tip of the shield machine 10 is continuously tracked, the shield machine 10 10 can be reached to the joint portion with higher accuracy.

The present invention is not limited to the embodiment of the above-mentioned embodiment, but can be variously modified and adopted within the scope of the constitution described in each claim. For example, the detection method of the present invention can be adopted not only in the case of docking tunnel excavating machines such as a shield machine, but also in the case of docking tunnel excavating machines in another reaching base such as a vertical shaft. ,
The invention is not limited to a tunnel excavating machine having a face type cutter face, and the present invention can be carried out by attaching a data carrier to a spoke type cutter face. Further, the plurality of data carriers to be attached to the cutter face should not necessarily be arranged at least linearly in the radial direction so that adjacent data carriers that draw concentric circles are provided unless there is a risk that information will be redundantly read by the antenna. Need not be placed.

[0040]

As described above in detail, according to the method for detecting the tip position of the tunnel excavating machine of the present invention, a plurality of data carriers are attached to the cutter face and the tip surface of the tunnel excavating machine is detected. When the position is reached, a boring hole is drilled from the work space facing the cutter face toward the cutter face, an antenna is arranged in this hole, the cutter face is rotated, and the information from a specific data carrier is transmitted by the antenna. To detect the tip position of the cutter face, it is possible to detect the tip position of the tunnel excavating machine easily, quickly and accurately using existing equipment without the need to collect data in advance or perform complicated analysis work. And even if the shape of the cutter face changes,
The tip position of the tunnel excavating machine can be detected accurately without being greatly affected.

Further, the plurality of data carriers may be arranged at a predetermined angular interval in the rotational direction of the cutter face so that at least the data carriers that draw concentric circles adjacent to each other are not linearly arranged in the radial direction. For example, by arranging the data carriers close to each other, it is possible to easily prevent the information of the plurality of data carriers from being duplicated and read by the antenna.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an implementation status of a method for detecting a tip position of a tunnel excavating machine according to an embodiment of the present invention.

FIG. 2 is a front view of the cutter face showing the arrangement of data carriers on the cutter face in the embodiment of FIG.

3A is a cross-sectional view taken along the line AA of FIG. 2, showing a mounting state of a data carrier on a cutter face, FIG.
(B) is an enlarged view of the X portion of (a).

FIG. 4 is an explanatory diagram showing a positional relationship of a plurality of data carriers arranged on the cutter face shown in FIG.

[Explanation of symbols]

 10, 11 Shield machine (tunnel excavator) 12, 13 Shield tunnel 14 Cutter face 15 ID tag (data carrier) 16 Antenna 18 Boring hole 19 Reader unit 30 Personal computer

Claims (2)

[Claims] 1. A method for detecting the tip position of a tunnel excavating machine, such as a shield machine or a tunnel boring machine, which has a cutter face that is rotationally driven at the tip surface, wherein a plurality of the cutter faces are provided. Attach the data carrier at different distances from the center of rotation of the cutter face so that when the cutter face is driven to rotate, each trajectory of the data carrier draws concentric circles with a predetermined interval in the radial direction. Every other time, when the tip end surface of the tunnel excavating machine reaches the detection position, a boring hole is formed from the working space such as another tunnel shaft or vertical shaft facing the cutter face toward the cutter face, and the hole is formed. An antenna for reading the information from the data carrier is inserted into the borehole to insert the antenna. A tenor is arranged near the cutter face, and the cutter face is rotated,
A method for detecting the tip position of a tunnel excavating machine, characterized in that the tip position of the cutter face is detected by identifying the data carrier passing near the position where the antenna is arranged and reading the information. 2. A plurality of data carriers attached to the cutter face are arranged at predetermined angular intervals in the rotational direction of the cutter face so that at least adjacent data carriers that draw concentric circles are not linearly arranged in the radial direction. The method for detecting the tip position of a tunnel excavating machine according to claim 1, wherein the method is provided in advance.