JPH0441890A - Drilling device for hard material - Google Patents

Abstract

PURPOSE:To drill a hard material in an optional direction by connecting front and rear hole wall grippers to each other through a propulsive extending and contracting device, connecting the front hole wall gripper with a casting through a drilling direction regulating device, and rotationally injecting a super-high pressure water. CONSTITUTION:Each drilling direction regulating device 5 is regulated to an equal length, and each hole wall pressing device 22 of a rear hole wall gripper 1 is extended and brought into contact with the hole wall 37 of a hard material 36. In the state where each hole wall pressing device 24 of a front hole wall gripper 2 is shortened and separated from the hole wall 37, a propulsive extending and contracting device 3 is extended to advance the front hole wall gripper 2 and the front part while injecting an ultra-high pressure water through a rotating nozzle 6. Then, each hole wall pressing device 24 of the front hole wall gripper 2 is extended and brought into contact with the hole wall 37, and each hole wall pressing device 22 is shortened and separated from the hole wall 37. The rear hole wall gripper 1 is advanced, and a drill device 38 is moved ahead to bore a hole 39.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a drilling device that can drill small-diameter holes in any direction in hard materials such as rock and concrete by jetting ultra-high pressure water. It is something that takes place in between.

(Conventional technology) Conventionally, when drilling small diameter holes in hard materials such as rock or concrete, there have been two methods: (1) drilling using a rock drill with a bit attached to the tip of a rod; (2) drilling using a rod; A method is adopted in which the hole is drilled using a core drill that has a cylindrical canter for core collection attached to the tip of the core drill.

[Problems to be solved by the invention] In the case of the drilling methods described in (1) and (2) above, the rock drill and core drill are large and heavy, so they require a large space and cause worker fatigue. There are problems in that the holes are intense, and only straight holes can be drilled, and noise, vibration, and dust are generated. In addition, if the hardness of the hard material is uneven, the chips (drilling chips) will not be discharged during drilling and will become entangled with the rod, making it difficult to pull the rod out of the hole. In this case, there is a problem that it is not possible to continuously drill long holes.

The object of the present invention is to provide a drilling device for hard materials that can advantageously solve the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above object, in the hard material drilling apparatus of the present invention, the rear hole wall gripper 1 and the front hole wall gripper 2 are connected to each other via a propulsion telescopic device t3. The front hole wall gripper 2 and the casing 4 disposed in front thereof are connected via a drilling direction adjustment device 5, and the casing 4
A rotary ultra-high pressure water injection nozzle 6 is attached to the front of the
The nozzle 6 is connected to an ultra-high pressure water supply hose 7.

Also, around the rear part of the support member 8, three or more holes are drilled in the direction t.
A rear pressing member 9 for section A is attached, and 31 or more front pressing members 10 for adjusting the drilling direction are attached around the front part of the support member 8. Ultra high pressure water supply hose 7 to high pressure water injection nozzle 6
is connected to the flexible propulsion member 1 through which the hose 7 is inserted.
1 can also achieve the above object by being connected to the support member 8.

Furthermore, a front casing 14 that is rotated by a rotation drive device 13 is attached to the front part of the rear casing 12, and an ultra-high pressure water jet that is rotated by a rotation drive device 15 is attached to the front part of the front casing 14. A screw rod 17, on which the nozzle 6 is swingably attached and rotated by a driving device 16 for drilling direction lit, is attached so as to extend in the diametrical direction of the front casing at the rear part of the front casing 14, and A female thread member 18 attached to the rear part of the driving device 15 is screwed to the screw rod 17, and a hole wall pressure contact device 19 is provided around the front casing 14.
A propulsion telescoping device 3 fixed to the rear casing 12
The above object can also be achieved by being connected to the hole wall gripper 20.

〔Example] Next, the present invention will be explained in detail using illustrated examples.

1 to 4 show a hard material drilling device according to an embodiment of the first invention, in which an annular rear holding member 21
Four hole wall pressure welding devices 2 consisting of fluid pressure cylinders are installed around the
2 are attached at equal angular intervals to constitute a rear hole wall gripper l, and four hole wall pressure welding devices 24 consisting of fluid pressure cylinders are attached around an annular front holding member 23 at equal angular intervals to form a rear hole wall gripper l. A hole wall gripper 2 is constructed, and the rear hole wall gripper 1 and the front hole wall gripper 2 are connected via a propulsion telescoping device 3 consisting of a fluid pressure cylinder. The rear ends of three drilling direction adjusting devices 5 each consisting of a fluid pressure cylinder are fixed, and each drilling direction adjusting device 5 is arranged at equal angular intervals around the center of the front holding member 23. , are arranged at equal distances from the center of the front holding member 23.

The front end of each drilling direction adjusting device 5 is connected to the rear part of the casing 4 via a ball joint 25, and a nozzle rotation drive device 26 consisting of an electric motor with a speed reducer is fixed in the casing 4. The output shaft of is connected to the rear end of a water supply rotating wheel 28 in a swivel joint 27 provided at the front of the casing 4, and the ultra-high pressure water injection system has a plurality of water fountains 29 at the front end of the water supply rotating wheel 28. The front end of the ultra-high pressure water supply hose 7 is connected to the water supply chamber 30 in the swivel joint 27, and the hose 7 is connected to the inside of the casing 4 and the front holding member 23.
The rear end of the hose 7 is connected to an ultra-high pressure water generator 1f31 that supplies ultra-high pressure water of 500 to 2000 kgf/cd, for example, ultra-high pressure water mixed with abrasives. ing.

An operation cable 32 through which a large number of water supply and drainage hoses and power supply cables are inserted is connected to an operation panel 33, the power supply cable is connected to a nozzle rotation drive device 26, and a water supply and drainage hose is connected to each of the fluid pressure cylinders, and A telescopic sheathing cylinder 34 is connected across the casing 4 and the front holding member 23, and an extensible covering cylinder 35 is connected across the rear holding member 21 and the front holding member 23.

When drilling a straight hole in a hard material using the drilling device according to the embodiment of the first invention, as shown in FIG. and as shown in FIG. Pressure welding device 2
4 is shortened and moved away from the hole wall 37, and while jetting ultra-high pressure water from the rotating nozzle 6, the propulsion telescoping device 3 is extended to position it at the front hole wall gripper 2 and in front of it. move the part forward, then move the propulsion telescoping device 3
is extended to the maximum extent, each hole wall pressure contact device 24 in the front hole wall gripper 2 is extended and brought into pressure contact with the hole wall 37, and each hole wall pressure contact device 22 in the rear hole wall gripper 1 is extended to the maximum extent.
is shortened to move it away from the hole wall 37, and then, as shown in FIG. 2 and the place in front of it! The forward movement of each part and the forward movement of the rear hole wall gripper 1 are repeated, and while the drilling device 38 is moved forward, ultra-high pressure water jetted from the nozzle 6, for example, ultra-high pressure water mixed with an abrasive, is used. A linear hole 39 is drilled.

When drilling a bent hole using the drilling device according to the embodiment of the first invention, as shown in FIG. , casing 4
and the parts supported thereby are inclined with respect to the front hole wall gripper 2, but the forward movement means of the drilling device 38 are the same as in the case of drilling a straight hole.

FIGS. 8 and 9 show a hard material drilling device according to an embodiment of the second invention, in which a support member 8, which is made of a tubular body extending in the front-rear direction, is provided with a support member 8 that can be freely expanded and contracted. Three rear pressing members 9 for adjusting the drilling direction made of rubber bags.
is fixed, and around the front part of the support member 8, three front pressing members 10 for drilling direction m nodes made of expandable and deflated rubber bags are fixed, and furthermore, the front end of the support member 8 is fixed. An ultra-high pressure water injection nozzle 6 is rotatably attached to the support member 8 via a swivel joint 4, and a signal from a spiral metal wire (for example, a spiral stainless steel van) is connected to the rear end of the support member 8 via a signal processing device 41. The flexible propulsion member 11
A flexible tube 42 is inserted into the flexible propulsion member 11, and the front end of the flexible tube 42 is connected to the flexible tube 42, which accommodates the ultra-high pressure water supply hose 7, a large number of air supply hoses, and signal wires.

The ultra-high pressure water supply hose 7 has a swivel joint 40.
, and independent air supply hoses are connected to each rear pressing member 9 for adjusting the drilling direction and each front pressing member 10 for adjusting the drilling direction, and a signal line is connected to the signal processing device 41. The water fountain 29 of the nozzle 6 is inclined in the direction opposite to the direction of rotation of the nozzle with respect to the diameter line of the nozzle, and the nozzle 6 is automatically rotated by the reaction force of the jet of ultra-high pressure water.

A rolling angle detector 43 and an inclinometer 44 are fixed to the support member 8, and the position and depth of the drilling device 38 are detected by an electromagnetic wave detector 45.

In addition, when drilling a curved hole, among the three rear pressing members 9 for adjusting the drilling direction and the front pressing member 10 for adjusting the drilling direction, which are lined up in the circumferential direction of the support member 8, the hole on the curved direction side is Without supplying compressed air to the rear pressing member 9 for direction adjustment and the front pressing member 10 for adjusting the drilling direction, the rear pressing member 9 for adjusting the drilling direction on the opposite side to the curved direction and the drilling direction fIj
Compressed air is supplied to the front pressing member 104 for the I section.

When implementing the second invention, four rear pressing members 9 and four front pressing members 10 may be fixed around the support member 8.

10 to 12 show a hard material drilling device according to an embodiment of the third invention, in which a rear casing 12
The rear part of the front casing 14 is rotatably attached to the front part of the front casing 14 , and an annular driven gear 46 is fixed to the center of the rear part of the front casing 14 . A pinion 47 fixed to the output shaft of the swing drive device 13 is meshed with the annular driven gear 46, and the front casing 14 is pivoted in the forward or reverse direction by the swing drive device 13.

Each piston rod in the hole wall grille and pad 20, which consists of two hydraulic cylinders connected in series, is connected to the rear casing 1.
The propulsion telescopic device 3 is inserted into a long hole 48 extending in the front-rear direction provided in the front casing 2 and fixed to a support base 49 in the rear goose song 12, and is connected to a cylinder in the hole wall gripper 20. The case of the front swivel joint 27 of I4 is pivoted by a horizontal shaft 50,
Furthermore, a rotational drive device 15 consisting of an electric motor with a reduction gear is fixed to the case of a swivel joint 27, and the output shaft of the rotational drive device 15 is inserted through the swivel joint 27, and the front end of the output shaft is inserted into the swivel joint 27. The ultra-high pressure water injection nozzle 6 is fixed, the ultra-high pressure water supply hose 7 is connected to the swivel joint 27, and the ultra-high pressure water passes through the swivel joint 27 and the water hole of the output shaft to the nozzle 6. It is sprayed from the fountain 29.

Drilling direction adjustment drive device 16 consisting of an electric motor with a speed reducer
is fixed to the rear part of the front casing 14 and has a screw punch 17
is arranged at the rear part within the front casing 14 so as to extend in the diametrical direction of the front casing, and is rotatably supported by the front casing 14 via a bearing,
A driving gear 5I fixed to the output shaft of the driving device 16 for adjusting the drilling direction is meshed with a driven gear 52 fixed to a screw rod 17, and a pin is fixed to a female screw member 18 screwed into the screw punch 17. The bottle is inserted into a long hole in Bukento fixed to the rear of the rotation drive device 15, and four hole wall pressure contact devices 19 are provided at equal angular intervals around the front casing 14, and the hole wall is The pressure welding device 19 includes a cylindrical body 53 extending in the radial direction of the front casing 140;
The hole wall engaging member 54 is slidably fitted into the hole wall engaging member 54, and a pressing spring 55 presses the hole wall engaging member 54 against the hole wall 37.

In the hard material drilling device according to the third embodiment of the invention, when the drilling device 38 is propelled, the propulsion telescoping device 3 is extended with the hole wall gripper 20 in pressure contact with the hole wall 37. , and the operation of shortening the propulsion contract W3 with the hole wall gripper 20 separated from the hole wall are repeatedly performed.

In addition, when drilling a bending hole, first the turning drive device 13
to rotate the front casing 14 so that the screw punch 17 is located on a plane passing through the bending direction of the bent hole, and then rotate the screw punch 17 by driving the drilling direction adjustment drive device 16. As a result, the ultra-high pressure water injection nozzle 6 swivel joint 27 and the rotation drive device 15 are swung about the horizontal axis 50.

When drilling a hole using the drilling device of each of the embodiments described above, the hole diameter can be adjusted by changing the jetting pressure of ultra-high pressure water and the propulsion speed of the drilling device.

Next, reinforcement of concrete structures will be explained.

In recent years, concrete deterioration in existing concrete structures due to salt damage has become a major social problem. When a concrete structure deteriorates, after drilling a small diameter hole in the concrete that extends along the reinforcing steel, insert a PCi wire into the hole and put tension between the PCi wire and the hole wall. The idea is to adopt a reinforcing method that maintains the strength of the concrete structure at the design strength by injecting and hardening a hardening material such as resin mortar and converting the stress that reinforcing bars should normally have into the PC wire. It will be done.

However, in the case of concrete structures with a box cross section such as tunnels, it is difficult to drill small diameter holes that extend along the reinforcing bars from inside the concrete structure, so reinforcing methods such as those described above are used. very difficult to do.

Conventionally, methods for reinforcing deteriorated concrete structures include: (1) Grinding the concrete in the deteriorated part of the concrete structure to expose the reinforcing bars, applying anti-rust treatment to the reinforcing bars, and then reinforcing the polished parts of the concrete. (2) Reinforcing method by applying a ground preparation material such as water stop material to the concrete and then filling it with mortar; (2) Reinforcing method by forcibly injecting hardening material such as synthetic resin liquid into reinforced concrete; (3) For tunnels. In the case of concrete structures, reinforcing means such as providing a reinforcing concrete lining inside the tunnel and having the concrete lining bear the external force acting on the tunnel are adopted.

However, in the case of the reinforcement method (11) mentioned above, it is difficult to grasp the situation of deteriorated parts of the concrete structure.In other words, it is difficult to grasp the situation of the deteriorated parts of the concrete structure.In other words, it is difficult to understand the situation of the rusted reinforcing bars inside the concrete, the progress of carbonation of the concrete, etc. Regarding understanding, there is a problem in that it is not possible to accurately understand only by estimating.

Furthermore, in the case of the reinforcing means (2) above, although it is an effective means of reinforcing cracked parts of concrete, it is insufficient in terms of reinforcing deterioration in the strength of reinforced concrete. In this case, there is a problem in that the concrete lining becomes considerably thicker and the effective cross-sectional area of the tunnel is significantly reduced.

Next, we will explain the concrete structure called the box culvert collar, which is buried underground.

FIG. 15 shows an underground concrete structure 56 consisting of a box culvert, which is generally constructed as a common ditch for sewers, power transmission lines, etc., or a tunnel structure for subways, etc. A bending moment as shown in FIG. 16, a shearing force as shown in FIG. 17, and an axial force as shown in FIG. 18 act on this underground concrete structure 56.

Next, an example of reinforcing an underground concrete structure using the drilling device of the present invention will be described.

FIG. 13 shows an example in which the entire circumference of the underground concrete structure 56 is reinforced.
In addition to extending along almost the entire circumference of the surrounding reinforcing bars 57,
A hole 39 that opens on the inner surface of the structure is drilled, a PC steel wire 58 is inserted into the hole 39 and tensioned, and a synthetic resin hardening grout material is applied between the PC steel wire 58 and the hole wall. is filled.

FIG. 14 shows an example in which parts of the underground concrete structure 56 where large stress occurs, such as the corner sides, are partially reinforced.
A hole 39 is drilled that extends along the corner side of the surrounding reinforcing bar 57 and opens to the inner surface of the structure, and the PCG is inserted into the hole 39.
A wire 58 is inserted and tensioned, and a hardenable synthetic resin grout material is filled between the PC steel wire 58 and the hole wall.

If the reinforcing means shown in Figs. 13 and 14 are adopted,
The underground concrete structure 56 can be easily reinforced in a short construction period without reducing the effective cross-sectional area. It is also possible to reinforce underground concrete structures while they are in operation.

Furthermore, even in the case of non-reinforced concrete structures, PC steel wires can be used to reinforce them as described above.

When implementing the present invention, the drilling device 38 may be configured to be automatically operated.

〔Effect of the invention〕

Since this invention is configured as described above, it produces the effects described below.

Using a small-section drilling device, straight holes and curved holes can be easily drilled, and the drilling direction can also be changed during drilling, which does not generate noise or dust. It is possible to drill holes without any vibration, the operator is not exposed to vibrations, and the drilling device can be operated remotely.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the first invention, in which Figure 1 is a side view of a drilling device for hard materials, and Figure 2 is an enlarged sectional view taken along line A-A in Figure 1. , Figure 3 is an enlarged sectional view taken along the line B-B in Figure 1, Figure 4 is a longitudinal sectional front view showing the state in which a hole is being drilled into an underground concrete structure by the drilling device, and Figures 5 and 6 are FIG. 7 is a partially longitudinal side view showing a state in which a straight hole is being drilled by the drilling device, and FIG. 7 is a partially longitudinal side view showing a state in which a curved hole is being drilled by the drilling device. 8 and 9 show a hard material drilling device according to an embodiment of the second invention, in which FIG. 8 is a partially longitudinal side view, and FIG. 9 is a line C-C in FIG. 8. FIG. 10 to 12 show an embodiment of the third invention,
Fig. 10 is a longitudinal cross-sectional side view of the drilling device for hard materials, and Fig. 11 is the DD of Fig. 10! The sectional view, FIG. 12, is an enlarged longitudinal sectional side view of the hole wall pressure welding device. FIG. 13 is a vertical cross-sectional front view showing a state in which the entire circumference of the underground concrete structure is reinforced, and FIG. 14 is a joint cross-sectional front view showing a state in which a part of the circumference of the underground concrete structure is reinforced. Figure 15 is a longitudinal sectional front view of the underground concrete structure,
Figure 6 shows the bending moment acting on the underground concrete structure, Figure 17 shows the shear force acting on the underground concrete structure, and Figure 18 shows the axial force acting on the underground concrete structure. FIG. In the figure, 1 is the rear hole wall gripper, 2 is the front hole wall gripper, and 3 is the propulsion condition! , 4 is a casing, 5 is a drilling direction adjustment device, 6 is a nozzle for ultra-high pressure water injection, 7 is a hose for supplying ultra-high pressure water, 8 is a support member, 9 is a rear pressing member for adjusting the drilling direction, 10 is a drilling Front pressing member for hole direction W node, 11
1 is a flexible propulsion member, 12 is a rear casing, 13 is a swing drive device, 14 is a front casing, 15 is a rotation drive device, 16 is a drive device for adjusting the drilling direction, 17 is a screw punch, 1
19 is a hole wall pressure contact device, 20 is a hole wall gripper, 21 is a rear holding member, 22 is a hole wall pressure contact device, 23
is a front holding member, 24 is a hole wall pressure contact device, 25 is a ball joint,
26 is a drive device for rotating the nozzle, 27 is a swivel joint, 28 is a water supply rotating shaft, 29 is a water fountain, 31 is an ultra-high pressure water generator, 37 is a hole wall, 38 is a hole drilling device, 39 is a hole, 4
6 is an annular driven gear, 47 is a pinion, 50 is a horizontal shaft, 5I
5 is a driving gear, 52 is a driven gear, 54 is a hole wall engaging member, 5
5 is a pressing spring, and 56 is an underground concrete structure. 11]

Claims (3)

[Claims] (1) The rear hole wall gripper 1 and the front hole wall gripper 2 are connected via the propulsion telescoping device 3, and the front hole wall gripper 2
and a casing 4 arranged in the front part thereof are connected via a drilling direction adjustment device 5, and a rotary ultra-high pressure water injection nozzle 6 is attached to the front part of the casing 4, and the nozzle 6 A hard material drilling device connected to a water supply hose 7. (2) Three or more rear pressing members 9 for adjusting the drilling direction are attached around the rear part of the support member 8, and three or more rear pressing members 9 for adjusting the drilling direction are installed around the front part of the support member 8. The ultra-high pressure water supply hose 7 is attached to the ultra-high pressure water injection nozzle 6 attached to the front end of the support member 8.
is connected to the flexible propulsion member 1 through which the hose 7 is inserted.
1 is a hard material drilling device connected to the support member 8; (3) Swing drive device 13 at the front of the rear casing 12
A front casing 14 is attached to the front casing 14, which is rotated by a rotation drive device 15, and an ultra-high pressure water injection nozzle 6, which is rotated by a rotation drive device 15, is swingably attached to the front of the front casing 14 to adjust the drilling direction. A screw rod 17 rotated by the rotary drive device 16 is attached to the rear part of the front casing 14 so as to extend in the diametrical direction of the front casing. The front casing 1 is screwed into the screw rod 17.
A hole wall pressing device 19 is provided around the hole wall 4, and the propulsion telescopic device 3 fixed to the rear casing 12 is connected to a hole wall gripper 20.