JPH0768850B2 - Horizontal boring machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a horizontal boring machine used for measuring a relative position of a center line of an excavating tunnel when a shield machine is docked, and more specifically, to an excavating machine. The present invention relates to a horizontal boring machine capable of improving the accuracy of a small-diameter horizontal boring hole, that is, the levelness.

[Prior Art] In muddy water shield work, in order to shield a shield machine launched from two vertical shafts in the ground without providing a vertical shaft, it is necessary that the center lines of the excavating tunnels coincide with each other. However, as the distance from the shaft increases,
Since the surveying error becomes large, it is necessary to correct the surveying error by using the check boring hole drilled from the ground.

However, in the case of an undersea tunnel, it is not possible to drill the check boring hole from the ground, so it is necessary to drill the boring hole with high accuracy while performing the underwater check from the shield machine side, but this is extremely difficult. Is.

Therefore, as disclosed in, for example, Japanese Patent Application No. 1-297529, the boring pipe is bored through the bulkhead of one shield machine to the other shield machine, and the tip position of the boring pipe is bored. When a hole position measuring device measures, a sensor is installed at the tip of the boring pipe, the other shield machine is excavated, and when the relative distance between the cutter disk of the shield machine and the sensor reaches a predetermined value, the sensor is measured. The slit position of the cutter disk is detected by the center of the slit, and the sensor is replaced with a radiation sealed radiation source to extend the boring pipe and the sealed radiation source is penetrated through the slit to cause radiation. A shield joint position measuring method has been proposed in which the position of the sealed radiation source is detected by a measuring device and the relative position of both shield machines is measured. To have.

According to the technique disclosed in this application, since the shield joint position can be measured without the need to drill a check boring hole from the ground, it can be effectively used for excavating a submarine tunnel.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, the center line of the boring pipe and the center line (extension line thereof) of the drill hole drilled by the shield machine are parallel to each other with high accuracy. Need to be This is because if the parallelism between the center line of the boring pipe and the extension line of the center line of the shield machine excavation hole is incorrect, the joining of the shield machine will be incorrect.

However, the hole formed by the boring pipe has a relatively small diameter, and in the prior art, there is a problem that the parallelism of the small diameter boring hole cannot be made highly accurate.

The present invention has been proposed in view of the above-mentioned problems of the prior art, and a horizontal boring which can excavate a small diameter boring hole with high accuracy and can be suitably used in a method of measuring the relative position of a shield machine. The purpose is to provide machines.

[Means for Solving the Problems] According to the present invention, an inner tube that penetrates the bulkhead of one shield machine and is rotated by a boring machine and an outer tube that is selectively fixed to the inner tube in the axial direction. And advance to dig, and after digging for a predetermined length, further digging by adding the inner pipe and the outer pipe, during digging, the digging direction is corrected by the observing means and the direction control means on the boring machine side, and the other After excavating the horizontal boring hole to the vicinity of the shield machine, pull out the inner pipe, replace the observation means with the position measurement means between the shield machines, and insert it again into the outer pipe, and use both the position measurement means between the shield machines. In a horizontal boring machine used for the shield joint position measuring method for measuring the relative position of the center line of the shield machine, the expansion and contraction is arranged at the tip of the inner pipe so that it can move in and out of the outer pipe. A bit, an observing means for observing the position of the tip of the inner tube from the inside of the shield machine through the inner tube, a direction control device installed near the tip of the outer tube, and the expansion / contraction bit installed in the shield machine. And a pressure balance device connected to the soil discharge hole for discharging the excavated soil.

Further, according to the present invention, the pressure balance device is connected to a discharge hole for discharging excavated earth and sand installed in the shield machine, and a fluid mixing hole installed on the discharge hole side of the pipeline. Is made up of.

Further, according to the present invention, the inner pipe and the outer pipe are provided with a water stop device for preventing the muddy water from entering the shield machine when the both pipes are replenished, when excavating and when the inner pipe is pulled out. Is equipped with a fixed part that is indirectly fixed to the shield machine and has a packing device that tightly seals the outer diameter of the pipe and is openable, and a packing device that can slide a predetermined amount coaxially with the fixed part. Made up of a slide part.

[Preferred Embodiment] In the practice of the present invention, a light emitting diode (LED) target is preferably used as the observation means.

Further, it is preferable to use a TV camera and a monitor TV as the observation means.

Further, as the position measuring means between the shield machines, a radioactive substance sensor using a radioisotope that emits radiation, a heat source that emits heat rays, and an ultrasonic wave source that emits ultrasonic waves are preferable. And, as a means for measuring the position of the radiation means from the other shield machine side, in the case of using a radioactive substance sensor, a measuring device equipped with a GM tube, in the case of a heat source, an infrared camera, in the case of an ultrasonic source. It is preferable to use an ultrasonic wave receiver. In addition to this, when measuring the position of the radiating means from the other shield machine side, after cutting and penetrating the bulkhead of the shield machine by the cutting means provided at the front end of the inner pipe, the cutting means is removed to observe means. It is also possible to attach and observe the observation means by the observation means. It is preferable to use a metal crown for this cutting means.

Further, as the direction control means, it is preferable that when the bit is expanded, it is in contact with the rear surface of the bit and the direction of the tip portion is controlled by four cylinders.

[Operation] According to the present invention configured as described above, when excavating the horizontal boring hole, the LED light of the observation means at the front end of the inner pipe is observed by the observation member (for example, monitor TV). And
When the center position of the boring hole is deviated, the direction control device is controlled to correct the direction of the bit excavation axis to the normal direction, that is, the direction completely parallel to the center line extension line of the boring hole by the shield machine, It is possible to perform accurate horizontal boring hole drilling.

Therefore, the relative position of the center lines of both shield machines is measured with high accuracy by the position measuring means between the shield machines. As a result, excavation can be performed so as to reduce the deviation amount of the center lines of both shield machines to zero, and the shield machine excavation holes (tunnels) can be accurately aligned at the docking points.

Here, especially in the case of subsea tunnel excavation, it is necessary to circulate the drilling mud while maintaining the face water pressure and to prevent the drilling mud from flowing back into the drill hole. On the other hand, in the present invention, since the water stop device and the pressure balance device are provided, it is possible to meet the above requirements.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a horizontal boring machine C according to the present invention.
It is shown.

In the figure, on a horizontal base 40, a moving base C1 and
A swivel head 17 connected to the moving base C1 is slidably supported and is moved forward and backward by two hydraulic cylinders 41. In the drawing, reference numeral 4 is a parent rod described later, 17 is a swivel head described later, 42 is an oil motor for rotating the expansion / contraction bit 1 described later, 43 is an outer tube pushing plate,
44 is a leveling jack, 45 is a front jack, 46 is a rear jack, 47 is a sub-feed cylinder, 48 is a hose connection port, and 49 is a soil discharge port.

In FIG. 3, the outer pipe 10 is inserted through the outer pipe stop valve 20, the outer pipe emergency stop valve 21, and the outer pipe water stop device 22, which are fixedly mounted on the bulkhead B1 of the shield machine A1. The front pipe 6 is connected to the front side of the outer pipe 10, and the outer pipe pushing plate 43 is connected to the rear side of the outer pipe 10.

The outer pipe pushing board 43 is rotatably locked to the horizontal base 40 via the main cylinder 15 and supported movably in the front-rear direction.On the rear side of the stop valve 23, the inner pipe emergency valve 24, An inner pipe water stop device 25 is integrally connected, and a swivel head 17 having an inner pipe chuck 18 is provided on the rear side of the water stop device 25.

An inner hole of the assembly from the leading conduit 6 to the inner tube chuck 18 is provided with a gap S, a parent rod 4, an inner tube rod 3 connected to the parent rod 4 by a cage, and a cage connection to the inner tube rod 3. The measured tip rod 2 is inserted, and a measuring inner diameter emergency stop valve 26 is fixedly provided at the rear end of the parent rod 4.

A rear inner pipe holder 14 is provided between the stop valve 26 and the inner pipe chuck 18, and an outer pipe holder 14 is provided outside the rear portion of the outer pipe 10.
A front inner pipe holder 13 is provided on a base 40 of the boring machine C, respectively, outside the connecting portion between the outer pipe 10 and the outer pipe pushing board 43.

The main body 22A of the outer pipe water stop device 22 is provided with a front outer pipe water stop packing 22a that closes the outer pipe 10 by contracting the cylinder a to seal the gap between the main body 22A and the outer pipe 10. There is. A slide case 22B that slides on the main body 22A via a slide packing 22d and is moved forward and backward by a slide cylinder 22c is provided. In the case 22B, the outer tube 10 is tightened by the contraction operation of the piston b, and the case 22B
Rear outer tube watertight packing that seals the gap between the outer tube and the outer tube 10
22b is provided.

The main body 25A of the inner pipe water stop device 25 is provided with a cylinder C similar to the outer pipe water stop device 22 and a front inner pipe water stop packing 25a. A sleeve 25C is provided via a rotary seal 25d in a slide case 25B that is moved forward and backward by the sub-cylinder 16 via a sliding packing 25c on the book 25A. A pipe water stop packing 25b is provided.

The swivel head 17 is provided with an inner tube chuck 18,
Hold the parent rod 4 with the shack piece 18a, and
When 7a is rotated in the normal direction, the parent rod 4 is rotated in the normal direction by the pinion 17b and the gear 18b.

Further, the outer pipe pushing plate 43 has a decompression device 19 for discharging soil in balance with pressurized water, a compressed air mixing hole 19a for increasing resistance in the pipe by mixing air and water, and four correction ports not shown. It is provided with two water supply ports, two pinch valve hoses, and is connected to a tip control circuit K that stores compressed oil pressurized water and compressed air together.

Further, a TV camera 28 is provided in the center of the axis of the parent rod 4, and this camera 28 is controlled by a control amplifier 29.
It is connected to the TV monitor 30, and these members 28 to 30 constitute an observation means.

Referring also to FIG. 4, the expansion rod 1 is provided at the front end of the tip rod 2, and the LED target 27 with a built-in battery, which is a light emitting target, is provided at the front end of the inner hole of the rod 2. A radio isotope sensor 31 (FIG. 6), which will be described later, is housed in the target 27.

A shoe 5 is provided at the front end of the front conduit 6, and the direction of the tip of the shoe 5 can be controlled by the expansion and contraction of the four correction cylinders 7 to control the excavation direction of the expansion / contraction bit 1. A hole direction control means is configured.

Further, in the outer pipe 10 and the destination conduit 6, the water supply circuit 1 connected to the water supply port of the tip control circuit K, the correction hydraulic circuit l2 connected to the correction port, and the air connected to the pinch valve hose. Hose l3 and respectively.

The water supply circuit 1 is opened to the rear of the expansion / contraction bit 1 via a check valve v, and the water sent from the opening is discharged together with the cutting soil through the pressure reducing device 19 through the gap S. The correction hydraulic circuit l2 is connected to the correction cylinder 7, and the air hose l3 is connected to the two pinch valves 8 and 9.

Next, the mode of construction will be described.

An outer pipe emergency stop valve 21 and an outer pipe water stop device 22 are attached to an outer pipe stop valve 20 attached to a bulkhead B1 of one shield machine A1.

Next, as shown in FIG. 5, boring machine C, operation panel D, rod rack E, hydraulic unit F, air compressor G, mud pump H and other accessory equipment are installed.

Next, the front conduit 6 and the outer pipe 10 are attached to the outer pipe water stop device 22.
Then, the expansion / contraction bit 1, the tip rod 2 and the parent rod 4 are attached to complete the equipment installation.

Then, the outer pipe 10 and the parent rod 4 are tightened and sealed by the rear outer pipe watertight packing 22b and the rear inner pipe watertight packing 25b, respectively, and the inner rod chuck 18 is operated to grip the parent rod 4.

Next, the decompression device 19 and the tip control circuit K are connected.

Then, pressurized water is supplied, the drainage pressure is adjusted, and the outer pipe stop valve 20 is opened.

Next, the hydraulic cylinders 41, 41 of the boring machine C are operated to move the parent rod 4, the inner pipe rod 3 and the tip rod 2 (hereinafter referred to as the inner pipe L) forward through the moving base C2, and the bit position is adjusted by the correction cylinder 7. The expansion bit 1 is expanded and the preparation for excavation is completed.

For the excavation, the inner pipe L, the shoe 5, the front conduit 6 and the outer pipe 10 (hereinafter referred to as the outer pipe M) are simultaneously advanced, the bit 1 is rotated by the oil motor 42 to excavate, and the drainage pressure is reduced by the decompression device 19. Adjust. At this time, after moving forward one stroke S of the base 40, the front outer pipe water-stop packing 22a is tightened to tighten the rear outer pipe water-stop packing 22b, the slide cylinder 22c is extended, and the rear outer pipe water-stop packing 22b is retracted. To do. Then, the rear outer pipe watertight packing 22b is tightened, the front outer pipe watertight packing 22a is loosened, the slide cylinder 22c is made free, and excavation is restarted.

To replenish the inner pipe L and the outer pipe M, first, the pinch valve is operated to stop the water supply, and the rear inner pipe water stop packing 25b is loosened.

Next, the outer tube holder 12 is tightened and the rear inner tube holder 14 is tightened to release the inner tube chuck 18.

Next, pull out the connection bolt 11 on the rear side, and
Retract the moving base C1 to retract the outer tube 10
Cut off from C1.

Next, the front inner pipe holder 13 is fastened to the inner pipe rod 3 to loosen the rear inner pipe holder 14, and the motor 17 of the swivel head 17 is tightened.
Reverse a and reverse the parent rod 4 to separate the inner tube rod 3 from the moving base C1.

Then, the moving base C1 is retracted to the maximum, another inner pipe rod (not shown) is set between the inner pipe rod 3 and the parent rod 4, and another inner pipe rod (not shown) is provided between the outer pipe 10 and the moving base C1. Set the outer tube of.

Operate the inner tube chuck 18 to grip the parent rod 4,
The inner tube rod set by rotating the 17a forward is connected to the inner tube rod 3 at the front and the parent rod 4 at the rear.

Then, the rear inner pipe holder 14 is tightened, and the inner pipe chuck 18
And loosen the front inner tube holder 13.

Next, a hose is connected, and the outer pipe set by the front and rear connecting bolts 11, 11 is connected to the front outer pipe 10 and the rear moving base C1.

Next, the inner pipe chuck 18 holds the parent rod 4 and loosens the rear inner pipe holder 14 and the outer pipe holder 12.

Next, the rear inner pipe water stop packing 25b is tightened, pressurized water is sent, and the pinch valves 8 and 9 are opened to complete the connection of the rods.

In this way, excavation and rod connection are repeated to advance the horizontal boring hole. At that time, always target 27
LED light of 4 is observed with TV camera 28, and four correction cylinders 7
By controlling the direction of the shoe 5, the excavation direction of the expansion / contraction bit 1 is maintained in the normal direction.

When the inner pipe L is pulled out after finishing the excavation to the vicinity of the opponent shield machine A2, the sub-cylinder 16 is extended and the swivel head 17,
The inner pipe L is retracted.

Then, the rear inner pipe holder 14 is tightened, and the inner pipe chuck 18
Open up.

Next, the front inner pipe watertight packing 25a is tightened, the rear inner pipe watertight packing 25b is loosened, the sub-cylinder 16 is contracted, and the swivel head 17 is advanced.

Then, the inner pipe chuck 18 is operated to move the rear inner pipe holder 14
Loosen.

Next, the rear inner pipe watertight packing 25b is tightened, the front inner pipe watertight packing 25a is loosened, and this operation is repeated to sequentially pull out the inner pipe L.

Then, after the expansion / contraction bit 1 passes through the inner pipe stop valve 23, the stop valve 23 is closed to complete the drawing of the inner pipe L.

The insertion of the inner pipe rod 3 provided with the sensor, the unillustrated additional inner pipe rod and the parent rod 4 is performed in the order of the inner pipe withdrawal.

(1) Inner tube rod 3 provided with a magnetic sensor or ultrasonic sound source
The shield machine A2 until it is close to the opponent shield machine A2.
The cutter disk is rotated and the position of the detection slit is measured from the output waveform of the sensor.

(2) Pull out the inner tube rod 3 provided with the magnetic sensor. However, in the case of an ultrasonic sound source, leave it as it is.

(3) Insert the inner tube rod 3 provided with a radioisotope (RI) sensor 31, a heat source or a sound source, etc. through the slit of the cutter disk of the shield machine A2, press it against the bulkhead, and attach it to the bulkhead in the shield machine A2 beforehand. The relative position is detected by the measuring device.

The following is the case of directly collimating through the bulkhead. That is, the bulkhead B2 of the opponent shield machine A2
As shown in FIG. 6, the arrival penetration to the RI machine 31 is confirmed from the inside of the shield machine A2 by a sensor (not shown) to confirm the position where the RI sensor 31 penetrates the bulkhead B2, and the gate valve 33 is welded to the confirmed position. This gate valve 33 has a water stop device 34
Install. In the figure, reference numeral 35 is a water blocking packing, 36 is a case, 37 is a water pressure gauge, and 38 is a stop valve.

Then, as shown in FIG. 7, open the gate valve 33,
The bulkhead B2 is cut and penetrated by the metal crown 32 attached to the tip of the inner pipe rod 3. Here, the RI sensor 31 is removed at the time of cutting penetration.

Then, as shown in FIG.
After tightening 35 to stop the water, remove the case 36, remove the metal crown 32, attach the light emitter target 39 to the inner tube rod 3, observe with the TV camera 38, shield machine A
1, Check the relative position of the center line of A2.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, when the shield machines are joined from the ground without drilling the check boring, one of the shield machines has a highly accurate horizontal position. Boring holes can be drilled. As a result, the relative positions of the center lines of both shield machines can be accurately measured, and the center lines of both tunnels can be made to coincide with each other when joining the shield machines and docking the excavation tunnel.

Further, in the present invention, since the water stop device and the pressure balance device are provided, it is possible to circulate the drilling mud while maintaining the face water pressure especially in the case of submarine tunnel drilling, and to prevent the drilling mud from flowing back into the drill hole. We can meet the request to do.

[Brief description of drawings]

1 and 2 are a side view and a top view showing a horizontal boring machine of the present invention, FIG. 3 is a side sectional view showing a moving base and a drilling head, and FIG. 4 is a side sectional view showing details of the drilling head. FIG. 5 is a vertical cross-sectional view of the shield machine showing a state at the time of excavating a boring hole, and FIGS. 6 to 8 are vertical cross-sectional views showing the order of arrival penetration. A1, A2 ... Shield machine, B1, B2 ... Bulkhead, C ...
… Horizontal check boring machine, C1… Moving base, C2…
… Drilling head, L… Inner tube, M… Outer tube, 1… Expansion / reduction bit, 2 …… Tip rod, 3… Inner tube rod, 4 …… Parent rod, 5 …… Shoe, 6 …… Tip Conduit, 7 …… correction cylinder, 10 …… outer pipe, 17 …… swivel head, 18 …… inner pipe chuck, 22 …… outer pipe water stop device, 25 …… inner pipe water stop device,
27 …… LED target, 28 …… TV camera, 30 …… monitor TV, 31 …… radio isotope sensor, 32 …… metal crown, 33 …… gate valve, 34 …… water stoppage, 35
...... Packing, 36 …… Case, 37 …… Water pressure gauge, 38 ……
Stopper valve, 39 ... Emitter target

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Muneo Yoshimura 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Within Kashima Construction Co., Ltd. (72) Inventor Yukinobu Sasaki 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Inventor Akira Nishimura 1-6-17 Meguro, Meguro-ku, Tokyo Within Tone Bowling Co., Ltd. (72) Inventor Kosei Yoshida 1-6-17 Meguro, Meguro-ku, Tokyo Incorporated company Tone bowling (72) Inventor Shigeru Oda 1-6-17 Meguro, Meguro-ku, Tokyo Incorporated company Tone bowling (56) Reference JP-A-63-22996 (JP, A)

Claims (3)

[Claims] Claim: What is claimed is: 1. An inner pipe that penetrates the bulkhead of one shield machine and is rotated by a boring machine, and an outer tube that is selectively fixed to the inner tube in the axial direction are advanced and dug to a predetermined length. When the excavation is continued, the inner pipe and the outer pipe are added to further excavate, and the excavation direction is corrected by the observation means and the direction control means on the boring machine side during the excavation, and the horizontal boring hole is excavated to the vicinity of the other shield machine. Then, the inner tube is pulled out, the observation means is replaced with the position measuring means between the shield machines, and is again inserted into the outer tube, and the relative position of the center lines of both shield machines is determined by the position measuring means between the shield machines. In a horizontal boring machine used for a shield joining position measuring method for measuring, a scaling bit installed at the tip of the inner pipe and configured to be able to move in and out of the outer pipe, and the position of the tip of the inner pipe Observation means for observing through the inner pipe from inside the shield machine, a direction control device installed near the tip of the outer pipe, and connected to a discharge hole for discharging excavated soil by the expansion bit by being installed in the shield machine. Horizontal boring machine characterized by comprising a pressure balance device. 2. The pressure balance device comprises a pipeline connected to an earth discharging hole for discharging excavated earth and sand installed in a shield machine, and a fluid mixing hole installed on the earth discharging hole side of the pipeline. A horizontal boring machine according to claim 1. 3. The inner pipe and the outer pipe are provided with a water stop device for preventing muddy water from entering the shield machine at the time of adding the both pipes, at the time of excavation and at the time of pulling out the inner pipe. A fixed part provided with a packing device that indirectly seals the outer diameter of the pipe fixed to the shield machine and is openable;
The horizontal boring machine according to claim 1, further comprising: a slide portion provided with a packing device that can slide a predetermined amount coaxially with the fixed portion.