JPH10205282A - Measuring method of shield joint position and measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to surely and easily execute the measuring of a shield joint position irrespective of a construction position of a tunnel. SOLUTION: In a state to oppose first shield machine 1 and second shield machine 2 to each other at a specific interval, boring is made toward the second shield machine 2 with a first boring mechanism 5 of the first shield machine 1 and, at the same time, boring is made with each of three second boring mechanisms 12 provided in the second shield machine 2. Then, a detection device for ultrasonic wave, electromagnetic wave, radiation ray, magnetism, etc., transmitted from a transmitting section 8 provided in the first boring mechanism 5 is received by receiving section 15 provided in the second boring mechanism 12, and the measuring of a relative position between the first shield machine 1 and second shield machine 2 is made to execute the measuring of a joint position between shield tunnels T1 and T2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring a shield joining position suitable for joining two shield tunnels underground.

[0002]

2. Description of the Related Art In general, when one shield tunnel is constructed, two shield machines are constructed from two sides of each shield tunnel, and these two shield tunnels are sometimes joined underground. .

In particular, when mechanically joining shield machines, two shield machines must be close to each other with an accuracy of about ± 5 cm immediately before joining. If the shield tunnel to be constructed is long, the above accuracy cannot be obtained if the position of each shield machine is optically measured by transit or the like from the starting shaft of each shield tunnel.

[0004] Therefore, when the shield tunnel is conventionally joined underground in this way, in order to confirm the joining position, when two shield machines reach a position facing each other across the ground at a predetermined interval. , And the relative positions of both are measured by other methods. As a method, for example, a small-diameter boring hole is formed horizontally from one shield machine side, and this boring hole is penetrated through a receiving steel pipe installed in the other shield machine or a partition wall of the other shield machine. There is a method of directly collimating through a hole to measure its position.

As another method, a boring hole is formed by a boring mechanism from one shield machine, and ultrasonic waves, electromagnetic waves,
There is also a method of detecting the position of the one shield machine by detecting the position of the boring mechanism with a sensor such as a radio isotope.

[0006]

However, the conventional method and apparatus for measuring the position of the shield joint as described above have the following problems. First, when measuring the shield joint position, when drilling a horizontal boring hole from one shield machine side and penetrating it into the receiving steel pipe on the other shield machine side, both shield machines must be within a certain degree of accuracy in advance. If they do not face each other, the boring holes cannot be penetrated. In addition, in places where the boring holes penetrate, measures for stopping water from underground water become large-scale.

Further, in the method of searching for the position of one shield machine from the face plate or the back side of the partition wall of the other shield machine using a sensor such as an ultrasonic wave, an electromagnetic wave, or a radioisotope, accuracy is higher than a method of direct collimation. drop down. In addition, a sensor or the like must be installed on the back side of the face plate or the partition wall. However, installation may be difficult depending on the structure of the shield machine.

The present invention has been made in consideration of the above points, and a shield joint position measuring method and method capable of reliably and easily measuring a shield joint position regardless of a tunnel construction position. It is an object to provide a measuring device.

[0009]

The invention according to claim 1 is
When excavating one shield tunnel by joining two shield tunnels excavated by two shield machines, one of the shield machines boring forward in the excavation direction. The first boring mechanism is provided with a transmitting unit for transmitting detection means at the tip end thereof, and the other shield machine is provided with a plurality of second boring mechanisms for boring forward in the digging direction. At the same time, a receiving section for receiving the detecting means transmitted by the transmitting section is provided at the tip of each of the second boring mechanisms,
In a state where two shield machines face each other at an interval, while performing boring with the first boring mechanism of one shield machine, and performing boring with the plurality of second boring mechanisms from the other shield machine, Subsequently, a detecting unit is transmitted from the transmitting unit of the first boring mechanism, the detecting unit is received by the receiving unit of each of the second boring mechanisms, and the first unit is transmitted based on the intensity or the receiving time of the received detecting unit. By detecting the position of the transmitting portion of the boring mechanism, the relative position between the one shield machine and the other shield machine is detected, and the joint position of the shield tunnel is measured.

According to a second aspect of the present invention, there is provided an apparatus for measuring a shield joining position used for excavating one shield tunnel by joining two shield tunnels excavated by two shield machines, respectively. A first boring mechanism for boring forward from the shield machine in the excavation direction, a transmitting unit provided at a tip end of the first boring mechanism to transmit detection means, and a forward direction from the other shield machine in the excavation direction. A plurality of second boring mechanisms that perform boring toward, and a receiving unit that is provided at the tip of each of the second boring mechanisms and that receives the detection unit transmitted from the transmitting unit. Features.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for measuring a shield joining position and an apparatus for measuring the position according to the present invention will be described below with reference to FIG.

As shown in FIGS. 1 and 2, shield tunnels T1 and T2 are excavated from both sides by a first shield machine (one shield machine) 1 and a second shield machine (the other shield machine) 2, respectively. When joining one shield tunnel T by joining these shield tunnels T1 and T2 underground, the first shield machine 1 and the second shield machine 2 are separated from each other by a predetermined distance. When they face each other with G interposed therebetween, both positions are confirmed.

For this, a measuring device having the following configuration is used.

The first shield machine 1 is provided with a small-diameter first boring mechanism 5 behind the bulkhead 3 (see FIG. 2) and inside the skin plate 4. The first boring mechanism 5 performs boring in the excavation direction forward through a bulkhead 3 (see FIG. 2) of the first shield machine 1 and a manhole (not shown) provided on the cutter disk 6. ing.

The excavating bit 7 provided at the tip of the boring rod 5a of the first boring mechanism 5 transmits, for example, ultrasonic waves, electromagnetic waves, radiation, magnetism, etc. as detecting means.
A transmitting unit 8 including a generating device, a magnet, and the like is provided.

The second shield machine 2 has a skin plate 1 behind the bulkhead 10 (see FIG. 2).
Inside, for example, three small-diameter second boring mechanisms 12 are provided. Each second boring mechanism 12
Boring is performed forward in the digging direction through a manhole or the like (not shown) provided on the bulkhead 10 (see FIG. 2) and the cutter disk 13 of the second shield machine 2.

The drill bit 14 provided at the tip of the boring rod 12a of each second boring mechanism 12 includes:
The ultrasonic waves, electromagnetic waves, radiation,
A receiving unit 15 including a sensor that receives detection means such as magnetism and detects the strength or reception time is provided.

In order to measure the position of the second shield machine 2 from the side of the first shield machine 1 facing at a predetermined distance by using such a measuring device, first, the first shield machine 1 and the second shield machine 1 are measured. When the machine 2 excavates to a position separated by a predetermined distance, the excavation is stopped.

Next, the first boring mechanism 5 performs boring horizontally on the ground G in front of the first shield machine 1 in the excavation direction. The excavation is stopped when the excavation bit 7 at the tip reaches a predetermined dimension before the cutter disk 13 of the second shield machine 2.

Subsequently, the three second boring mechanisms 12
In each case, the ground G in front of the second shield machine 2 in the excavation direction
Boring a predetermined length horizontally.

Then, in the transmitting section 8 of the first shield machine 1,
Ultrasonic waves, electromagnetic waves, radiation, magnetism, and other detection means are generated, and the receiving unit 15 of each second boring mechanism 12 detects the intensity or reception time. At this time, the position of the transmitting unit 8, that is, the position (direction) of the excavation bit 7 of the first boring mechanism 5 is determined based on the strength of the detecting means such as ultrasonic waves, electromagnetic waves, radiation, and magnetism in the three receiving units 15 and the reception time difference. Can be specified three-dimensionally.

Based on the detected position of the first boring mechanism, the position of the first shield machine 1 with respect to the second shield machine 2 is measured. Therefore, thereafter, based on the measurement results, the excavation directions of the first shield machine 1 and the second shield machine 2 are corrected as necessary, and the shield tunnel T1 and the shield tunnel T1 are corrected.
T2 is joined to construct one shield tunnel T.

In the above-described method of measuring the shield joining position, the first boring mechanism 5 of the first shield machine 1 uses the second boring mechanism 5 of the first shield machine 1 in a state where the first shield machine 1 and the second shield machine 2 face each other at a predetermined interval. The boring is performed toward the shield machine 2, the boring is performed by each of the three second boring mechanisms 12 provided in the second shield machine 2, and the transmitting unit 8 provided in the first boring mechanism 5 transmits the boring. The relative position between the first shield machine 1 and the second shield machine 2 is measured by receiving detection means for sound waves, electromagnetic waves, radiation, magnetism, and the like by the receiving unit 15 provided in each second boring mechanism 12. It is configured to measure the joint position of the shield tunnel T1, T2. In this manner, the tunnel junction position can be measured only by performing boring with the first boring mechanism 5 and the second boring mechanism 12, so that it is not necessary to perform a troublesome setup change as in the related art, and a short construction period is required. And the measurement operation can be easily performed. Further, since it is not necessary to penetrate a boring hole excavated from one shield machine side to the other shield machine side as in the related art, there is no particular need for a water stoppage measure. be able to. By applying such a measurement method, the shield tunnel T
Even under deep sea floor or under the sea floor,
No trouble occurs during the joining.

Further, according to the shield position measuring device described above, the first shield machine 1 is provided with the first boring mechanism 5 and the transmitting unit 8, and the second shield machine 2 is provided with three And a receiving unit 15 are provided. With such a simple configuration, the measurement method can be realized at low cost.
Further, on the second shield machine 2 side, there is no need to provide a magnetic sensor, a radio / isotope sensor, and the like on the back side of the face plate and the partition unlike the related art, so that there is no limitation due to the structure of the shield machine.

In the above embodiment, the first shield machine 1 and the second shield machine 2 may be provided with the first boring mechanism 5, the receiving unit 8, the second boring mechanism 12, and the receiving unit 15. Any other configuration may be used. Further, the number of installation bases and the installation positions of the second boring mechanism 12 are not limited at all. Further, when the excavation directions of the first shield machine 1 and the second shield machine 2 are at a predetermined angle, the above-described measurement is performed, and then the first boring mechanism 5 further performs a predetermined length boring. Then, the position of the transmitting unit 8 is detected again, and the direction of excavation of the first shield machine 1 is measured based on the two detection results.
You may make it measure the joining position of the 2nd shield machine 2 and. In addition to the above, other configurations can be appropriately adopted as long as they do not depart from the gist of the method and the apparatus for measuring the shield joint position according to the present invention.

[0026]

As described above, according to the shield joining position measuring method of the first aspect, the first boring mechanism is moved from one of the shield machines in a state where the two shield machines face each other at an interval. And boring from the other shield machine with each of the plurality of second boring mechanisms, and subsequently transmitting the detecting means from the transmitting section of the first boring mechanism, and transmitting the detecting means to the receiving section of each second boring mechanism. And detects the relative position between one shield machine and the other shield machine by detecting the position of the transmitting part of the first boring mechanism based on the intensity or the reception time of the received detecting means. Is configured to measure the bonding position. As described above, since the positional relationship between the two shield machines can be measured only by performing the boring, there is no need to change the setup as in the related art, and the measurement work can be performed quickly and easily. Can be. Further, since it is not necessary to penetrate a boring hole excavated from one shield machine side to the other shield machine side as in the related art, there is no particular need for a water stoppage measure. be able to. By applying such a measurement method, even if a shield tunnel is to be constructed underground at a large depth or under the seabed, there will be no trouble, and the shield tunnel is measured by measuring the shield joint position. Can be joined.

According to the shield position measuring device of the second aspect, the first boring mechanism for boring from one shield machine forward in the digging direction, and the detection provided at the tip of the first boring mechanism. A transmitting section of the means, a plurality of second boring mechanisms for boring from the other shield machine toward the front in the excavation direction, and detecting means provided at the distal end of each second boring mechanism and transmitted from the transmitting section. And a receiving unit that receives the data. Thus, the method for measuring the shield joining position according to claim 1 can be realized. Furthermore, it is only necessary to attach a transmitting unit to the first boring mechanism on one shield machine side and provide a receiving unit on the second boring mechanism on the other shield machine, a device using a conventional magnetic sensor or radio / isotope sensor As described above, there is no need to install it on the back side of a face plate or a partition wall, so that the apparatus can be significantly reduced in size without being limited by the structure of the shielding machine or the like.

[Brief description of the drawings]

FIG. 1 is a view showing an example of a method for measuring a shield joining position and a measuring apparatus according to the present invention, and is a perspective view showing a state in which a boring hole is formed from one shield machine to another shield machine. FIG.

FIG. 2 is an elevational sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First shield machine (one shield machine) 2 Second shield machine (the other shield machine) 5 First boring mechanism 8 Transmitting unit 12 Second boring mechanism 15 Receiving unit T, T1, T2 Shield tunnel

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yuji Yamakawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Osamu Urata 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation Inside the corporation

Claims (2)

[Claims] 1. Excavated by two shield machines, respectively.
When excavating one shield tunnel by joining two shield tunnels, one of the shield machines is provided with a first boring mechanism for boring forward in the excavation direction, and A transmitting portion for transmitting a detecting means is provided at a tip portion, and the other shield machine is provided with a plurality of second boring mechanisms for boring forward in the excavation direction, and a tip of each of the second boring mechanisms is provided. A receiving unit for receiving the detecting means transmitted by the transmitting unit, and thereafter, the first boring mechanism of one of the shield machines in a state where the two shield machines face each other at an interval. And boring from the other shield machine with the plurality of second boring mechanisms, respectively. Detecting means is transmitted from the transmitting part of the first boring mechanism, and the detecting means is received by the receiving part of each of the second boring mechanisms. Based on the strength or the receiving time of the received detecting means, the detecting means of the first boring mechanism is transmitted. A method for measuring a shield joint position, comprising: detecting a position of a transmitting unit to detect a relative position between the one shield machine and the other shield machine to measure a joint position of a shield tunnel. 2. Excavated by two shield machines, respectively.
A shield joining position measuring device used when excavating one shield tunnel by joining two shield tunnels comprises: a first boring mechanism for performing boring from one shield machine forward in a digging direction; A transmitting unit that is provided at the tip of one boring mechanism and transmits detection means, a plurality of second boring mechanisms that perform boring from the other shield machine toward the digging direction front, and a plurality of second boring mechanisms. A measuring unit for measuring the position of the shield joint, comprising: a receiving unit provided at each of the distal ends and receiving the detecting unit transmitted from the transmitting unit.