JP3014183B2 - Guiding device and method for shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for guiding a shield machine, and more particularly to an improvement in an apparatus and a method for guiding a shield machine for excavating and propelling underground to a predetermined position.

[0002]

2. Description of the Related Art In a shield construction method used when excavating a tunnel, as a means for confirming that a shield machine is being properly propelled, a survey on a premises using a transit 50 or the like, or a stand from a possible location is carried out. Check boring, which measures the position, is used to confirm the position of the shield machine. The control device for the excavation direction (not shown) of the shield machine is driven based on the on-site survey to correct the direction, and the excavation error of the shield machine is within about ± 100 mm. When the shield machine excavates for a long distance, an intermediate stand is provided and the shield machine is operated there to penetrate, and the position information is measured again. Regarding the penetration operation of the shield machine into the pit, since the final check boring, only the surveying within the yard has been performed, and at present, there is no guidance means in the pit. Due to the recent land situation, there is a problem that the pit excavation cannot be made large, and accurate guidance of the shield machine is required in the guidance in the pit. Needless to say, the guidance of the shield aircraft arriving on the ground. However, in the current state of the art, the excavation error of the shield machine is only about ± 100 mm at present.

[0003]

However, due to the recent land situation, there is a problem that the length of excavation is long because a large amount of piers cannot be obtained in the middle part, and there is a problem that the pier excavation cannot be made large. In the guidance, accurate guidance of the shield excavator is required. Needless to say, accurate guidance is required for guidance of the shield machine arriving on the ground. However, in the current state of the art, the excavation error of the shield machine is only about ± 100 mm at present. The current situation is that there is no guidance means within the erection. The present invention focuses on the above problems, and relates to an apparatus and a method for guiding a shield excavator, and more particularly, to an improvement of an apparatus and a method for guiding a shield excavator for excavating and propelling underground to a predetermined position.

[0004]

In order to achieve the above object, according to a first aspect of the present invention, an underground excavation is promoted from a pier that starts digging, and a predetermined pier to be reached is determined. A magnetic field generating loop coil for generating a magnetic field disposed in the shield machine, a power supply device for supplying current to the magnetic field generating loop coil, and a vicinity of the outer periphery of the shield machine. Detects the receiving sensor installed in the guide pit that is dug a predetermined distance parallel to the path of the excavation plan line from the arrival pit, and detects the distance between the reception sensor in the guide pit and the target pit And a signal processing device for calculating the positional shift amount of the shield machine based on a signal from a signal received from the receiving sensor.

According to a second aspect of the present invention, there is provided a guiding apparatus for a shield machine for excavating and propelling the underground from a stand which starts excavation and guiding the shield machine to a predetermined position of a stand to be reached. The magnetic field from the magnetic field generating loop coil arranged in the shielded machine is received by the receiving sensor arranged in the guide hole dug from the target in parallel with the path of the excavation planning line near the outer circumference of the shield machine, and the received signal received From the route of the shield machine excavation planning line and the position deviation,
The position shift is corrected so that the shield machine reaches a predetermined position as the target of the stand-up between the position at which the position shift is obtained and the stand-up of the target.

Further, in the third invention mainly based on the second invention, the reception sensor is moved together with the shield machine when correcting the positional deviation so as to reach the predetermined position of the standing resistance. Alternatively, the receiving sensor is moved together with the shield machine in the guidance field. Still further, in the fourth and fifth inventions mainly based on the second invention, when the positional deviation is corrected so as to reach the predetermined position of the stand, the reception sensor is moved together with the shield machine in the induction space. Alternatively, the position of the receiving sensor is moved and adjusted so that the position of the receiving sensor does not make it impossible to detect the magnetic field of the magnetic field generating loop coil.

[0007]

According to the above construction, a positional deviation from the path of the shield machine's excavation plan line is determined within a parallel guideway spaced a predetermined distance from the excavation plan line near the outer periphery of the shield machine, and the position deviation is determined. In order to correct the positional deviation so that the shield machine reaches the predetermined position as the arrival target of the upright in the distance between the calculated position and the distance between the arrival of the arrival target, Guidance is performed with high accuracy. For this reason, the occupied area on the ground is reduced, and the influence of construction work on the ground can be reduced.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a guiding device and a guiding method for a shield machine according to the present invention. FIG. 1 is a sectional view showing the overall configuration of an embodiment of a guidance device for a shield machine according to the present invention. In FIG. 1, a magnetic field generating loop coil 3 for generating a magnetic field is installed near the outer periphery of the shield machine 1 in a shield machine 1 excavating underground, and a power supply for supplying an alternating current to the magnetic field generating loop coil 3 is provided. A device 5 is provided. The shield machine 1 digs in the ground from the standing pier (A) at the start of excavation or the middle standing (B), and approaches the middle standing (B) or the standing pier (C). From the pier B or C, in the vicinity parallel to the path of the excavation plan line L to be excavated by the shield machine 1 and at a distance from the shield machine 1 by a predetermined distance (the point where the correction of the excavation is effective, Alternatively, the induction coil (D) is excavated so as to be close to the magnetic field generating loop coil 3. A reception sensor 7 for detecting a magnetic field generated from the magnetic field generating loop coil 3 is provided in the induction resistor D provided as described above. At this time, the inductive resistance D provided in the vicinity of the magnetic field generating loop coil 3 is a range in which the reception sensor 7 can detect a signal emitted from the magnetic field generating loop coil 3.
It depends on the size of the magnetic field generating loop coil 3 and the like. The positional relationship between the magnetic field generating loop coil 3 and the receiving sensor 7 is obtained from a signal detected by the receiving sensor 7. In order to determine the positional relationship of the shield machine 1 with respect to the stand B or C, a stand B or C is provided with a distance detecting device 9.
In order to calculate the position of the shield machine 1, the distance detection device 9
And a signal processing device 11 for calculating a signal of the receiving sensor 7.

The operation of the above configuration will be described. The shield machine 1 starts excavating from the standing A or B, and reaches the predetermined point up to the point (N) where the modification of the excavation of the standing B or C is effective (N), generally to the standing B or C. This is measured by a conventionally used distance meter mounted on the shield machine 1. When the shield machine 1 reaches the guidance position M where the correction of the excavation is effective before the penetration of the predetermined standing B or C, the magnetic field generating loop coil 3 generates a magnetic field. On the other hand, before the shield machine 1 reaches the guidance position M where the correction of the excavation is effective, the route of the excavation plan line to be excavated by the shield machine 1 (a straight line, a bending line) near the distance from the shield machine 1 before the shield machine 1 reaches the guidance position point M where the excavation correction is effective. Or it may be a curved line.)
Next, the magnetic field from the magnetic field generating loop coil 3 is induced by the induction resistance D.
The reception sensor 7 disposed in the reception sensor 7 stops the reception sensor 7 at the position where the reception intensity is maximized, and the signal data of the position from the standing B or C of the reception sensor 7 is received by the distance detection device 9. And the signal processing device 11 to calculate the position M of the shield machine. At the same time, the positional relationship between the magnetic field generating loop coil 3 and the receiving sensor 7 is determined from the signal detected by the receiving sensor 7 by a method such as the direction and intensity of the received signal. In this positional relationship, the distance of the shield machine 1 to the standing B or C (distance in the excavation direction), and
As shown in FIG. 2, the displacement (vertical P in the excavation direction and distance Q in the horizontal direction) of the position of the shield machine 1 is calculated from the planned line L where the shield machine 1 is excavated. Next, the calculated data of the position shift is sent to the shield machine 1, and based on the sent position shift, the shield excavator 1 moves the amount of the shift so as to head to the target point O of the upright standing B or C. Dig to fix. This correction is performed by moving the receiving sensor 7 described below, and excavation is performed until a position of the predetermined target point O of the upright bearing B or C is reached while obtaining the positional deviation.
The excavation is terminated when the arrest B or C is reached. The positional relationship between the shield machine 1 and the receiving sensor 7 when guiding the shield machine 1 will be described. One is a distance for detecting the distance M between the reception sensor 7 and the counter while moving and adjusting the reception sensor 7 to a position where the reception signal from the reception sensor 7 provided in the induction resistance D is maximized. The position of the reception sensor 7 is detected by the detection device 9 and the position of the shield machine 1 is measured. From that position, shield excavator 1 is standing B,
Alternatively, if the position measured earlier has a deviation toward C, excavation is performed so as to correct the deviation amount. Another method is the distance position of the shield machine 1,
Then, the displacement position is measured. Reception signal and reception sensor 7
From the position, the shield machine 1 is operated in the signal processing device 11, and the reception sensor 7 is moved by a predetermined distance so that the position of the reception sensor 7 does not become incapable of detecting the magnetic field of the magnetic field generating loop coil 3 due to the excavation of the shield machine 1. The shield machine 1 is guided to the position of the predetermined target point O up to the standing B or C by moving the position of the shield machine 1 and measuring the position, and proceeding with the excavation based on the detected position of the shield machine 1. . As described above, when adjusting the position of the shield machine 1 and excavating, there are two methods for the position of the reception sensor 7 as described above. The other is to move within a range where the position can be detected even if the reception intensity is slightly weakened, and to move the reception sensor at the point where position measurement becomes impossible. It is. In either case, there is no problem since the receiving sensor moves in the direction of the arrival standing and the shield machine is guided in the arrival standing. FIG. 6 is an overall configuration sectional view schematically showing a second embodiment of the guidance device for the shield machine of the present invention. In FIG. 6, the same devices as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. The shield machine 1 excavating underground aims at a predetermined reaching position on the ground. At this time, the guiding drag has been excavated from the ground in a position parallel to the path of the excavation plan line of the shield machine 1 at a predetermined distance from and near the shield machine 1.

[0010]

As described above, according to the present invention,
The position deviation is calculated from the guidance drag parallel to the path of the excavation planning line near the outer periphery of the shield machine, and the shield machine reaches the stand-off position between the position where the position deviation was found and the distance between the target target standoffs. In order to correct the positional deviation so as to reach the predetermined target position, guidance of the shield machine to the arrival target is performed with high accuracy. In addition, since it is only necessary to excavate the guiding drag for a short distance from the reaching of the reaching target, a short time is sufficient and the efficiency is high. In addition, due to the increased accuracy, the area occupied on the ground is reduced,
An excellent effect that the influence of construction on the ground can be reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall configuration cross-sectional view schematically illustrating a first embodiment of a guidance device for a shield machine of the present invention.

FIG. 2 is a sectional view taken along the line ZZ of FIG. 1 of the first embodiment of the present invention.

FIG. 3 is a diagram showing a guidance flow of the guidance device of the shield machine of the present invention.

FIG. 4 is a diagram showing a part of the guidance flow of the guidance device for the shield machine of the present invention.

FIG. 5 is a diagram showing a part of the guidance flow of the guidance device for the shield machine of the present invention.

FIG. 6 is an overall configuration sectional view schematically showing a guidance device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield machine 3 Magnetic field generation loop coil 5 Power supply device 7 Receiving sensor 9 Distance detection device (A) Standing for excavation start (B) Intermediate standing (C) Standing which is target

Claims (5)

(57) [Claims] In a shield machine guiding apparatus for excavating and propelling the ground from a pier that starts digging and guiding a shield machine to a predetermined position of a pier to be reached, a magnetic field provided in the shield machine is generated. A magnetic field generating loop coil to be generated, a power supply device for supplying a current to the magnetic field generating loop coil, and an inductive coil excavated to a position at a predetermined distance in parallel with the path of the excavation planning line from the reaching stand near the outer periphery of the shield machine. A distance sensor that detects the distance between the reception sensor in the induction drag and the target stall, and the displacement amount of the shield machine based on a signal from a reception signal from the reception sensor. And a signal processing device that performs arithmetic processing on the signal. 2. A guiding apparatus for a shield machine for excavating and propelling the underground from a stand to start excavation and for guiding the shield machine to a predetermined position of a stand to be reached. A magnetic field from the loop coil is received by a receiving sensor disposed in an inductor drilled from the target in the vicinity of the outer periphery of the shield machine in parallel with the path of the drilling plan line, and the shield machine is planned based on the received signal. The position deviation from the path of the line is calculated, and the position deviation of the shield machine is set so as to reach the predetermined position as the target of the vertical position between the position at which the position deviation is obtained and the distance between the target positions. A method of guiding a shield machine, wherein the method is to correct the noise. 3. The method for guiding a shield machine according to claim 2, wherein the reception sensor is moved together with the shield machine when correcting the positional deviation so as to reach a predetermined position of the stand. 4. The method for guiding a shield machine according to claim 2, wherein the receiving sensor is moved together with the shield machine in the guide frame when the positional deviation is corrected so as to reach a predetermined position of the stand. . 5. The receiving sensor according to claim 2, wherein the position of the receiving sensor does not make it impossible to detect the magnetic field of the magnetic field generating loop coil when the positional deviation is corrected so as to reach the predetermined position of the standing force. A method for guiding a shield machine, characterized by moving and adjusting the position of a shield machine.