JPH0559885A - Guiding device and method for shield excavator - Google Patents

Abstract

PURPOSE:To precisely guide a shield excavator to the arrival target by receiving the magnetic field from a magnetic field generating loop coil provided on the shield excavator with a receiving sensor arranged in a guide pit, and correcting the displacement with the path of an excavation planned line. CONSTITUTION:When a shield excavator 1 reaches a guide position point M where an excavation can be corrected before the preset vertical shaft B or C is penetrated, the magnetic field is generated from a magnetic field generating loop 3. The magnetic field is received by a receiving sensor 7 arranged in a guide pit D, the signal data of the position of the receiving sensor 7 from the vertical shaft B or C are sent to a distance detecting device 9 and a signal processing device 11, and the position M of the shield excavator 1 is calculated. The distance of the shield excavator 1 to the vertical shaft B or C and the drift of the position of the shield excavator 1 from a planned line L are calculated. The data are sent to the shield excavator 1, and the drift quantity is corrected toward the target point of the vertical shaft B or C based on the data for an excavation.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In a shield construction method used for excavating a tunnel, as a means for confirming that the shield machine is propelled correctly, a ground survey using a transit 50 or the like, or erecting a standing shaft from a possible location. The method of confirming the position of the shield machine is adopted by the check boring that measures the position. From this on-site survey, the control device for the excavation direction (not shown) of the shield machine is driven to correct the direction, and the excavation error of the shield machine is within ± 100 mm. When the shield machine excavates a long distance, an intermediate pit is provided and the shield machine is operated and penetrated to re-measure the position information. Regarding the penetration operation of the shield machine into the standing shaft, since the last check boring, it has been performed only by premises survey, the current situation is that there is no accurate guiding means in the standing shaft. Due to the recent land situation, there is a problem that the excavation of the vertical shaft cannot be made large, and accurate guidance of the shield machine is required for the internal guide of the vertical shaft. Needless to say, the guidance of the shield aircraft arriving on the ground. However, the current state of the art is that the digging error of the shield machine is only about ± 100 mm.

[0003]

However, due to the recent land situation, many pits cannot be taken in the middle part, which results in a long excavation distance and a problem that the pit excavation cannot be made large. Accurate guidance of the shield excavator is required for guidance. Needless to say, the same exact guidance is required for the guidance of the shield machine arriving on the ground. However, the current state of the art is that the digging error of the shield machine is only about ± 100 mm. The current situation is that there is no accurate guide means in the pit. The present invention focuses on the above problems, and relates to a guide device and method for a shield machine, and in particular, an object of the invention is to improve a device and method for guiding a shield machine for excavating and propelling the ground to a predetermined position.

[0004]

In order to achieve the above object, in the first aspect of the present invention, the excavation is started from the starting point of excavation, and the ground is excavated and propelled to reach a predetermined target point. In the induction device of the shield machine for guiding the shield machine to the position of, the magnetic field generation loop coil disposed in the shield machine for generating a magnetic field, the power supply device for supplying a current to the magnetic field generation loop coil, and the vicinity of the outer periphery of the shield machine Detects the receiving sensor installed in the guide shaft that has been excavated at a position parallel to the route of the planned excavation line from the reaching shaft and the distance between the receiving sensor in the guide shaft and the target shaft And a signal processing device for calculating the positional deviation amount of the shield machine by a signal from a reception signal from the reception sensor.

According to the second aspect of the invention, in the shield machine guiding device for excavating and propelling the ground from the shaft for starting excavation to guide the shield machine to a predetermined position of the shaft to be reached, the shield machine is provided. The magnetic field from the magnetic field generation loop coil arranged in the field is received by the receiving sensor installed in the induction tunnel that has been dug from the target to reach near the outer periphery of the shield machine and in parallel with the route of the planned excavation line. While seeking the position deviation from the route of the excavation plan line of the shield machine from,
The position deviation is corrected so that the shield machine reaches a predetermined position which is the arrival target of the standing force between the position where the position deviation is obtained and the standing position of the reaching target.

Further, according to a third aspect of the invention, which is mainly based on the second aspect, the reception sensor is moved together with the shield machine when the positional deviation is corrected so as to reach a predetermined position of the standing. Alternatively, the receiving sensor is moved within the induction drag along with the shield machine. Furthermore, in the fourth and fifth inventions, which are mainly based on the second invention, whether the receiving sensor is moved within the guide shaft together with the shield machine when the positional deviation is corrected so as to reach a predetermined position of the vertical axis. Alternatively, the position of the reception sensor is moved and adjusted so that the position of the reception sensor does not make the magnetic field of the magnetic field generation loop coil undetectable.

[0007]

According to the above construction, the position deviation of the shield machine from the planned excavation line is obtained in a parallel guide shaft which is separated by a predetermined distance from the shield machine near the outer periphery of the shield machine. In order to correct the positional deviation so that the shield machine reaches the predetermined position which is the arrival target of the standing force between the obtained position and the distance between the rising edge of the reaching target, Guidance is performed accurately. Therefore, the area occupied on the ground is reduced, and the influence of construction on the ground can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a shield machine guide device and guide method according to the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the overall configuration showing the outline of one embodiment of a guide device for a shield machine according to the present invention. In FIG. 1, a shield machine 1 excavating underground has a magnetic field generation loop coil 3 for generating a magnetic field installed near the outer periphery of the shield machine 1, and a power supply for supplying an alternating current to the magnetic field generation loop coil 3. A device 5 is provided. The shield machine 1 digs into the ground from the excavation start pit (A) or the intermediate pit (B), and approaches the intermediate pit (B) or the target pit (C). From the pit B or C, in the vicinity of being separated from the shield machine 1 by a predetermined distance in parallel to the route of the excavation plan line L for excavation of the shield machine 1, (a point where the digging correction is effective, generally the pit B, Alternatively, the induction resistance (D) is excavated so as to be close to the magnetic field generation loop coil 3 up to a point of several tens of meters. A receiving sensor 7 for detecting the magnetic field emitted from the magnetic field generation loop coil 3 is provided in the induction resistance D thus provided. At this time, the induction resistance D provided in the vicinity of the magnetic field generation loop coil 3 is a range in which the reception sensor 7 can detect a signal emitted from the magnetic field generation loop coil 3,
It depends on the size of the magnetic field generation loop coil 3 and the like. The positional relationship between the magnetic field generation loop coil 3 and the reception sensor 7 is obtained from the signal detected by the reception sensor 7. A distance detecting device 9 is provided on the proof B or C to obtain the positional relationship with respect to the proof B or C of the shield machine 1.
In order to calculate the position of the shield machine 1, the distance detection device 9
And a signal processing device 11 for calculating the signal of the reception sensor 7.

The operation of the above structure will be described. The shield machine 1 starts excavation from the A or B, and the shield machine 1 reaches a predetermined point up to the point (N) where the correction of the excavation of the B or C is effective, or roughly the B or C. What is done is measured by a conventionally used rangefinder mounted on the shield machine 1. When the shield machine 1 reaches the guide position point M where the excavation correction is effective before the predetermined piercing B or C is penetrated, the magnetic field generating loop coil 3 generates a magnetic field. On the other hand, the guiding resistance is a route (straight line, bending line) of the excavation planned line to be excavated by the shield machine 1 in the vicinity separated from the shield machine 1 before the shield machine 1 reaches the guide position point M where the excavation correction is effective. Alternatively, it may be a curved line.) And install them at positions equidistant from each other.
Next, the magnetic field from the magnetic field generation loop coil 3 is induced D
Is received by the receiving sensor 7 disposed inside the receiving sensor 7, and the receiving sensor 7 is stopped at the position where the receiving intensity is maximized, and the signal data of the position is detected from the position B or C of the receiving sensor 7 by the distance detecting device 9 And the signal processor 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 obtained from the signal detected by the receiving sensor 7 by the method such as the direction and intensity of the received signal. In this positional relationship, the distance of the shield machine 1 to the pit B or C (distance in the excavation direction), and
As shown in FIG. 2, the deviation of the position of the shield machine 1 (vertical P in the excavation direction, distance Q in the horizontal direction) is calculated from the planned line L for excavating the shield machine 1. Next, the calculated data of the displacement of the position is sent to the shield machine 1, and the shield machine 1 is displaced based on the transmitted displacement so that the shield machine 1 is directed toward the target point O of the standing resistance B or C. Go digging to fix. This correction is carried out until the position of a predetermined target point O of the standing-up / standing-up resistance B or C is reached while the positional deviation is obtained by moving the receiving sensor 7 described below.
When it reaches the rising edge B or C, the excavation ends. The positional relationship between the shield machine 1 and the reception sensor 7 when guiding the shield machine 1 will be described. One is a distance for detecting a distance M between the receiving sensor 7 and the erecting pit while adjusting the receiving sensor 7 to a position where the received signal from the receiving sensor 7 provided in the inductive drag D is maximized. The detector 9 detects the position of the reception sensor 7 and measures the position of the shield machine 1. From that position, the shield machine 1 is standing B,
Alternatively, when there is a deviation in the previously measured position such as toward C, the digging is performed so as to correct the deviation amount. Another method is the distance position of the shield machine 1,
And measure the displacement position. Received signal and sensor 7
The shield machine 1 is operated in the signal processing device 11 from the position of, and the receiver sensor 7 is moved by a predetermined distance so that the position of the receiver sensor 7 does not make the magnetic field of the magnetic field generation loop coil 3 undetectable by the excavation of the shield machine 1. The position of the shield machine 1 is measured by moving and adjusting the position of the shield machine 1, and the shield machine 1 is guided to the position of the predetermined target point O up to the pit B or C by advancing the excavation according to the detected position of the shield machine 1. .. As described above, when adjusting the position of the shield machine 1 and moving forward, there are two methods for the position of the reception sensor 7 as described above. One is the position of the reception sensor when the shield machine advances. The other is to move the reception sensor at the point where position measurement becomes impossible, and the other is to measure the position within the range where the position can be detected even if the reception intensity becomes weak. Is. Either method causes no problem because the receiving sensor moves in the direction of reaching and standing and the shield machine is guided to the standing and standing and standing. FIG. 6 is a cross-sectional view of the overall configuration showing the outline of a second embodiment of the induction device for a shield machine of the present invention. In FIG. 6, the same devices as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The shield machine 1 excavating the ground is aimed at a predetermined reaching position on the ground. At this time, the guide shaft is excavated from the ground at a position near the shield machine 1 in parallel with the route of the planned excavation line of the shield machine 1 by a predetermined distance.

[0010]

As described above, according to the present invention,
The position of the shield machine is reached near the outer periphery of the shield machine from the guide hole parallel to the route of the planned excavation line, and the shield machine reaches the short distance between the position where the position deviation was obtained and the target stand In order to correct the positional deviation so as to reach the target predetermined position, the shield machine is guided to the arrival target with high accuracy. In addition, since it is sufficient to excavate the induced drag for a short distance from the pit of the target to be reached, the time is short and the efficiency is good. Furthermore, because the accuracy is improved, the occupied area on the ground is reduced,
The excellent effect that the influence of construction on the ground can be reduced is obtained.

[Brief description of drawings]

FIG. 1 is an overall configuration sectional view showing the outline of a first embodiment of a guide device for a shield machine according to the present invention.

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

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

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

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

FIG. 6 is a sectional view of the overall configuration showing the outline of a guiding device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 shield machine 3 magnetic field generating loop coil 5 power supply device 7 reception sensor 9 distance detection device (A) excavation start pit (B) intermediate pit (C) target pit

Claims (5)

[Claims] 1. A shield machine induction device for excavating and propelling the ground from a shaft for starting excavation to guide the shield machine to a predetermined position of the shaft to be reached, in which a magnetic field arranged in the shield machine is applied. 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 induction resistance dug at a position that is a predetermined distance parallel to the path of the planned excavation line from the reaching shaft near the outer periphery of the shield machine. A receiving sensor arranged inside, a distance detecting device for detecting the distance between the receiving sensor in the induction drag and the standing pit to be reached, and a positional deviation amount of the shield machine by a signal from the received signal from the receiving sensor. A guide device for a shield machine, comprising: 2. A magnetic field generated by a shield machine in a guide machine of a shield machine for excavating and propelling the ground from a shaft for starting excavation to guide the shield machine to a predetermined position of the shaft to be reached. The magnetic field from the loop coil is received near the outer periphery of the shield machine by a receiving sensor that is installed in the guide shaft parallel to the path of the planned excavation line and reached from the target, and the received signal is used to plan the shield machine excavation. In addition to finding the position deviation from the line path, the position of the shield machine is adjusted so that the shield machine reaches the predetermined position as the arrival target of the standing edge between the position where the position deviation is found and the standing target of the standing object. A method for guiding a shield machine, which is characterized by correcting 3. The method of guiding a shield machine according to claim 2, wherein the receiving sensor is moved together with the shield machine when the positional deviation is corrected so as to reach a predetermined position of the standing edge. 4. The method of guiding a shield machine according to claim 2, wherein the receiving sensor is moved in the guide shaft together with the shield machine when the positional deviation is corrected so as to reach a predetermined position of the vertical axis. .. 5. The receiving sensor according to claim 2, wherein the position of the receiving sensor does not make the magnetic field of the magnetic field generating loop coil undetectable when the positional deviation is corrected so as to reach a predetermined position of the standing edge. A method for guiding a shield machine, which comprises moving and adjusting the position of the shield.