JPH0586796A - Propulsion direction detecting device for small bore pipe pusher - Google Patents

Abstract

PURPOSE:To promote the detection of an inferior construction by measuring and storing in memory an excavating position of a pilot head, by comparing the stored value with the position of an excavating head during excavation, and by issuing an alarm when the difference therebetween exceeds a predetermined value. CONSTITUTION:A pilot pipe 6 connected to a pilot head 4 having a cutter 9 is pushed by a propulsion jack 5. A positional shift of the head 4 is measured, with respect to a planned line with the use of a laser or the like, at predetermined intervals. Thus measured values are stored in memory, and the positional shift is compensated. After completion of the excavation, an excavating head incorporating a large diameter cutter is connected to the pipe 6, and a pipe to be buried is connected to the pipe 6 and is pushed by the jack 5 while muck is discharged from the pipe 6. Further, the position of the excavating head during excavation is measured with the use of a laser or the like, at predetermined intervals, and is indicated on a display device. Further, if the positional shift exceeds a predetermined value, the device is stopped and an alarm is issued. Accordingly, it is possible to prevent the jack from generating an excessive propulsion force caused by a positional shift, and further it is possible to prevent a pipe such as hume pipe or the like from being broken.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion direction detecting device and method for a small diameter tube propulsion device, and more particularly to a propulsion direction detecting device and method for detecting the propulsion direction of a two-step method of a small diameter pipe propulsion device. The present invention relates to improvements in a propulsion direction detection device and method for a small-diameter pipe propulsion machine.

[0002]

2. Description of the Related Art Conventionally, as a method for excavating a small-diameter pipe propulsion machine in two steps, as shown in FIG. 6, first, in the first step, a pilot head 111 is set and a cutter 112 is rotated.
Pilot head 1 at rear propulsion jack 113 in standing tunnel
Promote 11 Next, while the pilot head 111 is propelled and the direction is corrected along the predetermined planned excavation line so that there is no deviation, the pilot pipes 114
Connect and go. When the pilot head 111 reaches the reaching shaft 115, the pilot head 111 is recovered from the reaching shaft 115. When the recovery of the pilot head 111 is completed, the slurry pipe 116 for slip transfer is inserted into the pilot pipe from the reaching shaft 115. Next, in the second step shown in FIG. 7, in the start-up stand 117,
The drilling head 118 is set and connected to the slurry device. In the second step, while excavating with the cutter 119 in the front part of the excavation head 118 while propelling with the rear propulsion jack 113 in the pit while following the hole of the pilot pipe 114 in the first step, the excavated sludge (earth and sand) 120. Is slurried and carried out through the slurry pipe to the arriving shaft 115.
Simultaneously with the propulsion of the excavation head, the rear propulsion jack will connect the buried pipes in sequence. When the excavation head reaches the arrival pit, the excavation head is collected and the work ends.

[0003]

However, in excavation of a small-diameter pipe propulsion machine, even if the excavation of the pilot pipe in the first step is carried out almost along the planned line, the fume pipe in the second step, etc. The earth and sand move to the lower part of the excavation head when the buried pipe is propelled, and the earth and sand intake port of the excavation head is blocked by the earth and sand, and the excavation head rises and the excavation head becomes a hole in the pilot pipe of the first step. It may not go along. Therefore, there is a problem that the propulsive force of the rear propulsion jack in the standing pit becomes excessive and the fume tube is broken. The present invention focuses on the above-mentioned problems, and relates to an excavation direction device and method for a small-diameter pipe propulsion machine, and in particular, a propulsion direction detection device and method for detecting the propulsion direction of a two-step system of a small-diameter pipe propulsion machine are provided. The object is to improve a propulsion direction detecting device and method for a small-diameter pipe propulsion machine.

[0004]

In order to achieve the above object, in the first aspect of the present invention, the thrust is applied by the propulsion drive unit provided at the rear while measuring and correcting the direction of the pilot head. The first step of excavating and applying thrust to the buried pipes sequentially inserted in the rear of the excavating head by the propulsion drive unit provided in the rear while excavating by the excavating head along the hole of the pilot excavated in the first step. In a small-diameter pipe propulsion machine consisting of a second step of sequentially burying, a measuring device for measuring a vertical deviation from a digging direction line with respect to a planned digging line at predetermined intervals during digging of the pilot head in the first step, and A storage device for storing the measured value; a measurement device for the second step for measuring a vertical deviation from the excavation direction line at the same position as the predetermined interval in the first step during the excavation of the buried pipe in the second step; With the process An arithmetic unit for comparing the measurement value calculation, a warning device which performs warning by one of at least the display or sound when it exceeds the difference between the measured value is a predetermined value,
And a control device that controls a hydraulic device that drives the propulsion device when the difference between the measured values exceeds a predetermined value.

According to the second aspect of the invention, the first step in which the thrust is applied by the propulsion drive unit provided in the rear while measuring and correcting the direction of the pilot head to advance the hole, and the pilot hole excavated in the first step A small-diameter pipe propulsion machine comprising a second step of sequentially burying the embedded pipes sequentially inserted behind the excavation head by a propulsion drive unit provided in the rear while advancing along the First
At the time of excavation of the pilot head in the process, the vertical deviation from the excavation direction line with respect to the planned excavation line is measured at predetermined intervals, and the measured value is stored, and at the time of excavation of the buried pipe in the second process, A vertical deviation from the excavation direction line is measured at the same position, and compared with the measured value of the first step, and when the difference between the measured values exceeds a predetermined value, at least a warning is given by either a display or a sound.

[0006]

According to the above construction, the laser target is provided in the pilot head in the first step and in the excavating head in the second step, and the excavation direction line of the laser light from the laser transit hits the laser target. A measuring device for measuring a vertical deviation between the measuring device and the measuring device is provided, and the measured value is transmitted to and stored in a storage device at predetermined intervals when the computer is advanced, and the position is processed by a computer and displayed on a display device.

At this time, in the second step, a warning is given when the difference between the measured values exceeds a predetermined value, so that the operator can immediately recognize the occurrence of the abnormality. For this reason, the operator can take action such as stopping the hydraulic pump of the propulsion device or reducing the hydraulic pressure. It is also possible to give a warning and automatically stop the hydraulic system. As a result, it is possible to prevent the propulsive force at the rear propulsion jack in the standing pit from becoming excessive and prevent the fume tube from cracking.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a digging direction device and method for a small diameter pipe propulsion device of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a structural cross-sectional view showing the outline of one embodiment of the first step of the excavation direction device for a small-diameter pipe propulsion machine of the present invention, and FIG. 2 is a structural cross-sectional view showing the outline of one embodiment of the second step. Indicates. FIG. 3 shows a block diagram of the excavation direction device of the small diameter pipe propulsion device of the present invention.

In FIG. 1, a small-diameter pipe propulsion device 1 has a propulsion drive unit 100 that is movable forward and backward on a base 3 that is fixedly installed in a bit 2 excavated from the ground. In the propulsion drive unit 100, the propulsion jack 5 for pushing the pilot head 4 is arranged in the first step, and in the second step, the motor 8 is inserted into the pilot pipe 6 shown in FIG. And the propulsion jack 5 for pushing the propulsion drive unit 100. A screw 7 is connected to the motor 8 via a gear or the like, a cutter 9 is provided at the tip of the pilot head 4, and is rotated by a hydraulic motor 10 to excavate the earth and sand, and the propulsion jack 5 pushes it to advance it. There is. .. A pilot pipe 6 and a pilot head 4 that is in contact with the pilot pipe 6 are connected to the propulsion jack 5 via a push plate 11, and the pilot head 4 is moved leftward in the drawing. Further, the propulsion jack 5 is provided with a reaction force receiver 13 installed along the side wall surface of the bit 2.
On the other hand, by extending the piston rod 5A of the propulsion jack 5, the push plate 11 is advanced to the left in the figure.

A cutter 9 is rotatably arranged at the tip of the pilot head 4, and the cutter 9 receives torque from a hydraulic motor 10 in the pilot head 4 to rotate. Further, the cutter 9 and the hydraulic motor 10 connected to the cutter 9 are connected to the rod 15 and the connecting portion 1 that is rotatably supported by a bearing or the like.
6 is connected to the swing jack 17 and swings in the pilot head 4 by extension and extension of the swing jack 17, and the cutter 9 can swing. Further, a laser target 18 is provided near the rear of the pilot head 4.
The laser beam 19a from the laser transit 19 disposed in the bit 2 is received and the vertical deviation from the excavation direction line is measured at the position hit. An electric inclinometer 20 is arranged in the pilot head 4 to measure the inclination of the pilot head 4. The measured value of the measured positional deviation is sent to the storage device 30a of the computer 30 as the target signal 21 and stored therein. Further, this measured value is compared with the planned line for the excavation, and when it is deviated from the planned line, the excavation is performed while the cutter 9 is tilted by the swing jack 17 to correct the propulsion direction.

In FIG. 2, the excavation head 50 of the second step is connected to the pilot pipe 6 of the hole formed in the first step, and propelled by the propulsion drive device 100 to excavate. The drilling head 50 has an outer diameter larger than that of the pilot pipe which is inserted into the pilot pipe 6 and rotates via a screw 7 and a torque transmission device 51 such as a planetary gear connected to the motor 8 outside the pilot pipe 6. The cutter 52, the torque transmission device 51, the excavation head pipe 54 for accommodating the bentonite injection pipe 53, and the like, and the laser target 55 of the second step arranged in the excavation head pipe 54. The cutter 52 has a conical shape on the digging side, and the propulsion drive unit 100
While being rotated by the motor 8, the thrust is pushed by the propulsion jack 5 to excavate the scrap (sand), and the excavated scrap is pushed forward by the sleeker 7.

The laser target 55 of the second step is the first
Similar to the process, the laser beam 19a from the laser transit 19 arranged in the bit 2 is received and the vertical deviation from the line of the excavation direction is measured at the hit position. The measured value of the measured positional deviation is sent as a target signal to the arithmetic unit of the computer 30 to perform arithmetic operations such as comparison with the position in the first step.

FIG. 3 shows a block diagram of the excavation direction device of the small diameter pipe propulsion machine of the present invention. The small-diameter tube propulsion machine 1 and the shaft 2 are a measuring device including a laser target 55 and a laser transit 19 for measuring the vertical deviation from the excavation direction line at predetermined intervals during the excavation of the pilot head 4 in the first step. 60, or the laser target 5 in the second step for measuring the vertical deviation from the excavation direction line at the same position as the predetermined interval in the first step during the excavation by the excavating head 50 in the second step.
5 and a laser transit 19 measuring device 61
And are provided. The target signal 21 measured by the measuring devices 60 and 61 is input into the control device 65. The control device 65 includes a computer 30 including a computing device 69 such as a CPU 66, a RAM 67, a ROM 68, etc. that performs computation, storage, and commands, and a storage device 70, a keyboard (referred to as a KB interface) 71, a display 72, and a printer 7.
3, each interface of the line 74, an analog / digital converter 75 (referred to as A / D), a parallel input and an output 76 (referred to as PIO).
And consists of. A keyboard 71A for inputting data of a planned excavation line, excavation conditions, etc. to the KB interface 71
However, the display interface 72 displays an abnormality or emits a warning sound when the difference between the measured or calculated data and the calculated difference exceeds a predetermined value.
Further, A is connected to the printer interface 73, and a printer 73A that records measured data or calculated data is connected to the printer interface 73. In addition, the line interface 7 does not have to store each data in the storage device.
The recording medium 78 may be recorded on the recording medium 78.

An amplifier 77 is connected to the PIO 76 and the A / D 75, and the amplifier 77 has a propulsion jack 5, a motor 8,
The rocking jack 17, the hydraulic pump 81 for supplying pressure oil to the hydraulic motor 10, etc., the hydraulic valve 82, or
A hydraulic control device 80 such as a pressure regulating valve 83 is connected. Further, a pressure sensor 84 or the like for measuring the pressure of the pressure regulating valve 83 is connected to the amplifier 77.

The operation of the above structure will be described. In the first step, first, the pilot head 4 is set, the cutter 9 is rotated, and the pilot jack 4 in the pit 2 propels the pilot head 4. Next, while the pilot head 4 is propelled and the direction is corrected so that there is no deviation along a predetermined planned line, the pilot pipes 6
Connect and go. This excavation is performed as shown in the flowchart of FIG. In step 1, the vertical deviation between the position in the excavation direction and the excavation direction line is measured by the measuring device 60 including the laser target 18 and the laser transit 19, and the data is displayed on the display device 72A. At this time, at every predetermined interval, as in step 2, for example, it is determined whether or not the propulsion jack 5 reaches the stroke end and the pressure regulating valve 83 is relieved. If not, the return data signal is returned to the original state. To send. At this time, the propulsion length when the pressure regulating valve 83 relieves is normally set to be equal to the length of the buried pipe, for example, but it is not necessarily equal and may be set at predetermined intervals.

In step 3, when the pressure regulating valve 83 is relieved, the position of the excavation direction line (propulsion length) and the vertical deviation are measured, stored in the storage device 70 of the computer 30, and displayed on the display device 72A. This measurement is carried out at the position of the end of the digging promotion in step 4, that is, the reaching resistance 85.
Repeat until the position of comes. At this time, it may be recorded in a recording medium. When the excavation propulsion is at the end position, the propulsion unit is stopped (step 5).

Next, in the second step, first, the excavation head 50 is connected to the pilot pipe 6, the cutter 52 is rotated, and the thrust is pushed by the propulsion jack 5 to excavate the gap. At this time, the excavation advances along the pilot pipe 6, but construction data during propulsion of the pilot pipe 6, for example, vertical deviation from the excavation direction line at the same position as the predetermined interval during excavation, construction of propulsion force, etc. Data are simultaneously input (step 10). At this time, the laser target 36 in the second step receives the laser light from the laser transit 19 disposed in the bit 2 as in the first step, measures the propulsion length and position, and calculates the target signal. Device 6
9 and the data is displayed on the display device 72A (step 11).

Further, the arithmetic unit 69 compares the position data of the pyro-tube 14 at the time of propulsion, which is measured in the first step and stored in the storage unit 70, with the current data (step 1).
2). In step 13, the difference is less than a predetermined value, for example ±
It is determined whether it is 5 mm or less. If the value is equal to or greater than the predetermined value, the PIO outputs a stop signal to the hydraulic pump 81 (step 17). Along with this command, the display device 72A
Then, the indications such as "pump stop" and "large displacement of position" are displayed to stop the hydraulic pump 81 (step 18).

If the difference is less than the predetermined value in step 13, it is determined in step 14 whether the rear propulsion jack has reached the stroke end and the pressure regulating valve 83 has been relieved. Return. If the relief is performed, the process proceeds to step 15 to determine whether the propulsion is completed. If not, the propulsion length is calculated and added (step 16), and the process returns to step 11. When finished, stop the propulsion machine and finish the work (1
9).

[0020]

As described above, according to the present invention,
The vertical deviation between the excavation direction line of the 1st process and the 2nd process is measured and compared, and when the difference between the measured values exceeds a predetermined value, a warning is given, so that the operator is immediately notified of the abnormality. I understand. As a result, the operator can stop the hydraulic pump of the propulsion device, take measures such as lowering the hydraulic pressure, or automatically stop it, so that the propulsive force at the rear propulsion jack in the pit is reduced. It is possible to obtain an excellent effect that it is possible to prevent it from becoming excessive and prevent the fume tube from cracking.

[Brief description of drawings]

FIG. 1 is a first excavation direction device for a small diameter pipe propulsion device according to the present invention.
Sectional drawing which shows 1st Example of the process.

FIG. 2 is a structural cross-sectional view schematically showing one embodiment of the second step of the present invention.

FIG. 3 is a block diagram of an excavation direction device of the small diameter pipe propulsion device of the present invention.

FIG. 4 is a diagram showing a flow chart of the first step of the small diameter tube propulsion apparatus of the present invention.

FIG. 5 is a diagram showing a flow chart of a second step of the small diameter tube propelling machine of the present invention.

FIG. 6 is a sectional view showing the construction of an example of a first step of a conventional small-diameter pipe propulsion machine.

FIG. 7 is a sectional view showing the construction of an example of a second step of a conventional small-diameter pipe propulsion machine.

[Explanation of symbols]

 1 small diameter pipe propulsion machine, 2 bits, 4 pilot head, 5 propulsion jack, 6 pilot pipe, 8 motor, 9 cutter, 10 hydraulic motor, 17 swinging jack, 18 laser target, 19 laser transit, 21 target signal, 30 Computer, 50 drilling head, 51 torque transmission device, 52 cutter, 55 laser target, 60, 61 measuring device, 65 control device, 69 arithmetic device, 70 storage device, 80 hydraulic device, 81 hydraulic pump, 82 hydraulic valve, 83 adjustment Pressure valve,

Claims (2)

[Claims] 1. A first step in which a thrust is provided by a propulsion drive unit provided in the rear while measuring and correcting the direction of the pilot head and the excavation head is provided along a hole of a pilot excavated in the first step. In a small-diameter pipe propulsion machine, a pilot head of a first step, which comprises a second step of sequentially burying a buried pipe sequentially inserted behind the excavation head by a propulsion drive unit provided in the rear while digging Measuring device for measuring a vertical deviation from the planned excavation line with respect to the planned excavation line at predetermined intervals during the excavation, a storage device for storing the measured value, and a first device for excavating the buried pipe in the second step.
Measuring device for the second process, which measures the vertical deviation from the excavation direction line at the same position as the predetermined process interval, and an arithmetic device, which compares and calculates the measured values of the first process, and the difference between the measured values. A warning device that gives a warning by at least one of a display and a sound when the value exceeds a predetermined value, and a control device that controls a hydraulic device that drives the propulsion device when the difference between the measured values exceeds the predetermined value. A propulsion direction detection device for small-diameter pipe propulsion machines. 2. A first step in which a thrust is provided by a propulsion drive unit provided at the rear while measuring and correcting the direction of the pilot head and the excavation head is provided along the hole of the pilot excavated in the first step. In a small-diameter pipe propulsion machine, a pilot head of a first step, which comprises a second step of sequentially burying a buried pipe sequentially inserted behind the excavation head by a propulsion drive unit provided in the rear while digging The vertical deviation of the planned line from the excavation planned line is measured at predetermined intervals during the excavation, and the measured value is stored, and at the same time as the predetermined interval of the first step during the excavation of the buried pipe in the second step. Measure the vertical deviation from the digging direction line and compare it with the measurement value of the first step, and when the difference between the measurement values exceeds a predetermined value, at least display or warn. A method for detecting the propulsion direction of a small-diameter pipe propulsion device.