JPH10306692A - Open type tunnel excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform improvement and reinforcement on earth and mountain obtaining necessary jacking reaction by slidably mounting a rock excavation device turnably and inclinably supporting a multi-function rock drill in the tunnel axis direction to a main beam or in the direction perpendicular thereto with regard to an open type tunnel excavator. SOLUTION: A rock drill device is comprised of a multi-function rock drill 23 and its moving mechanism, and they are individually provided on both the sides of a beam front side part 10. A lift base 31 reciprocally moving in the direction intersecting to the tunnel axis direction is screwed to a spline shaft 30. A hydraulic motor normally and reversely rotating a support part 32 in a vertical face is incorporated in the lift base 31, and a base end 34a inclinably supports a guide shell 34 supporting the end part 33 of the multi-function rock drill 23 on the support part 32. In addition, a moving motor M fixed on a gear is attached to a movable support member, and reciprocal movement is performed in the direction of excavation of an excavator 1 by normal and reverse rotation of the motor M. Thus, improvement and reinforcement can be performed on earth and mountain obtaining necessary reaction force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called open tunnel excavator for propelling and excavating by applying a propulsive reaction force to a gripper.

[0002]

2. Description of the Related Art Conventionally, in an excavation operation using an open tunnel excavator, a gripper is extended and pressed against a tunnel pit wall to secure a propulsive reaction force, and a cutter head is rotated and a thrust jack is pushed to move one stroke at a time. The work of propulsion excavation is repeatedly performed.

[0003] However, when the ground to be excavated is soft or the degree of crushing is advanced, the necessary propulsion reaction force from the tunnel pit wall may not be secured due to the gripper sinking into the ground. .

In order to solve such a drawback, for example, as shown in FIG. 9, a rock drill 3 is mounted on the rear side of a cutter head 2 of an open tunnel excavator 1, and the rock drill 3 is soft. It is known that a predetermined propellant excavation is performed by injecting a required injection agent through an injection hole 4 drilled into a natural ground while improving and reinforcing the ground at which a required reaction force can be obtained.

[0005]

However, the above rock drill 3
Can be simply turned at the mounting position and can be appropriately drilled at a plurality of positions, and the drilling range is extremely narrow.
Therefore, there is a drawback that the open tunnel excavator 1 itself must be moved to a required position in order to enlarge the drilling range in, for example, the tunnel axial direction.
An object of the present invention is to provide an open tunnel excavator that eliminates such a drawback.

[0006]

According to the present invention, an open tunnel excavator includes rock drills A and C which support a multifunctional rock drill 23 so as to be able to turn and tilt with respect to a main beam 8.
It is mounted so as to be slidable in the direction of the tunnel axis or in the direction crossing it.

It is preferable that the rock drilling apparatuses A and C have a configuration in which a multi-function rock drill 23 is mounted on moving mechanisms B and D.

As a moving mechanism B, a movable support member 25 is supported on guide rails L, L of a support frame 24 fixed to the beam front side portion 10 so as to be slidable in the tunnel axial direction. An elevating platform 31 is screwed onto a spline shaft 30 vertically provided on the movable support member 25 so that it can be slid in a direction intersecting with the tunnel axis direction. It is preferable that the movable support table 39 be mounted on the fixed arcuate guide rails L 'and L "and be slidable in a direction intersecting the tunnel axis direction, with a simple structure, reliable operation, and preferable.

Further, the gripper 1 is attached to the main beam 8.
The configuration in which the two propulsion units 9 and 9 including 3 and 13 are arranged in series in front and rear at a required interval is extremely advantageous for propulsion excavation in a soft ground.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the open tunnel excavator of the present invention will be described with reference to FIGS.

Reference numeral 5 denotes an open tunnel excavator, which comprises a mount 7 for mounting and supporting a cutter head 6 on the front side.
The rock drilling device A and the front propulsion unit 9 are arranged on the front side 10 of the main beam 8 extending to the rear side, and the rear propulsion unit 9 is arranged on the rear side 11 of the beam (FIG. 1).

The beam front side portion 10 and the beam rear side portion 11 are cylindrical bodies having the same rectangular cross section, and they are connected to form a main beam 8, and the opposing side walls 10a, 1a.
A guide shoe 12 is formed on the lower edge of the lower side 0a, 11a, 11a (FIGS. 1 and 2).

The propulsion unit 9 is provided on the upper part of a machine frame 15 having a pair of pressing jacks 14 and 14 for pressing the grippers 13 and 13 on both sides of the tunnel wall S, the beam front side 10 and the rear side. Guide shoe 12, 12 of part 11
A pressing portion 18 having upstanding guide plates 17, 17 formed with slide shoes 16, 16 to be fitted to the beam, and a vertically extending lower surface of each front end portion of the beam front side portion 10 and the rear side portion 11. A flat T-shaped mounting base 19 and four propulsion jacks 20 provided between the mounting base 19 and brackets 18a protruding from the front of the machine frame 15 are provided. According to the drive out or degenerate
The pressing portion 18 is moved forward or rearward along the guide shoes 12, 12. Reference numeral 21 denotes a rear supporter such as a hydraulic jack which presses the bottom of the tunnel wall S to maintain the attitude of the main beam 8 horizontally.

In the main beam 8, the transport start end 2 is provided.
2a is disposed so as to protrude into the cutter head 6, and a carry-out conveyor 22 is disposed in which the transport end portion 22b is protruded to the rear side from the rear end portion. It is carried out backward.

The rock drilling apparatus A comprises a multi-function rock drilling machine 23 and a moving mechanism B thereof, and is separately provided on both sides of the beam front side portion 10. The details are as follows.

In the moving mechanism B, reference numeral 24 denotes a support frame fixed to the side wall 10a of the beam front side portion 10. The support frame 24 is provided between the upper end portions and the lower end portions of the vertical frame members 24a, 24a provided with a required interval. Guide rails L, L between each
Are parallel to each other and are constructed in a rectangular side view (FIGS. 1, 3, and 4).

Reference numeral 25 denotes a movable support member. Four rollers 26 are arranged at the upper end and the lower end of the inner surface so as to sandwich the opposing guide rail L, and a gear 27 is provided at an intermediate portion. A moving motor M fixed to the drive shaft is attached.

Brackets 29, 29 are provided in the middle of the vertical frame members 24a, 24a. The roller chains 28 are engaged with the gears 27 of the moving motor M. In accordance with the reverse rotation, the movable support member 25 reciprocates in the digging direction α1 of the open tunnel excavator 5, that is, in the tunnel axial direction (hereinafter, the stone digging forward direction is referred to as α1 ′, and the digging reverse direction is referred to as α1 ″).

A spline shaft 30 is vertically installed on the outer surface of the movable support member 25 so as to be rotatable. The spline shaft 30 is moved up and down (vertically) according to the rotation of the spline shaft 30, that is, in a direction intersecting the tunnel axis direction. , A reciprocating elevator 31 is screwed.

The lift 31 has a built-in hydraulic motor (not shown) for rotating the support 32 forward and backward in a vertical plane. The support 32 has an end 33 of the multi-function rock drill 23.
Is supported at its base end 34a so as to be tiltable (FIG. 4). In addition, a tilting jack 35 is provided between one side portion of the support portion 32 and a tip portion 34b of the guide shell 34.

The multi-function rock drilling machine 23 has a predetermined impact mechanism, a rod rotation mechanism, and a propulsion mechanism that moves along the guide shell 34, and has a drilling press-fitting rod 23a detachably mounted.

The drilling press-fitting rod 23a forms two passages for separately flowing a mixed liquid of a hardening agent, a quick setting agent and the like, and a main liquid of cement milk and the like, and ejects them. One of the nozzles and the required bit are formed at the tip. As the drilling press-fit rod 23a, Japanese Patent Publication No. Hei 7-6869 developed and provided by the present applicant as a device directly used for implementing the ground improvement stabilization method previously.
No. 6 discloses this.

The drilling press-fit rod 23a has a moving motor M
And the excavation direction α according to the forward / reverse rotation of the spline shaft 30.
1 and in the vertical direction α2, and by rotating the support portion 32 forward and reverse, it turns in a vertical plane around the support portion 32, and further, at an arbitrary turning position by the expansion and contraction drive of the tilting jack 35. To tilt.

Next, a method of reinforcing a tunnel ground using the rock drilling apparatus having the above configuration will be described. In order to drill the injection hole Sa at a required position on the tunnel wall S while the open tunnel excavator 5 is stopped, the injection holes Sa having a desired depth are simultaneously formed with the drilling press-fit rods 23a. Drill holes.

Thereafter, the drilling press-fit rods 23a, 23a
Is pulled out while supplying a predetermined injecting agent thereto, and the injecting agent is injected into the ground to form a plurality of columnar compacts Sb, Sb at desired locations on the tunnel wall surface S.
Note that the drilling press-fitting rods 23a, 23a do not necessarily need to be moved simultaneously, and may be moved separately, or only one of them may be moved.

While the open tunnel excavator 5 is excavating, the injection hole S is formed at a required position on the tunnel wall S.
In order to bore a, the movable supporting member 25 is moved by the reinforcing means moving mechanism B, B at the same speed as the open tunnel excavator 5 in the forward direction α1 ′, but in the reverse direction α1 ″. , While drilling press-fit rods 23a,
23a is inserted into the tunnel wall S, and an injection hole having a required depth is drilled. In the same manner as described above, the columnar compact Sb,
Create Sb.

That is, the multifunctional rock drills 23, 23 are moved in the excavation reverse direction α1 ″ at the same speed as the excavation speed α1 ′ of the open tunnel excavator 5 in the excavation forward direction α1 ′, so that they are tunneled. When the open tunnel excavator 5 is excavated by holding it in a stopped state with respect to the wall surface S, similarly to the case where the open tunnel excavator 5 is stopped, drilling and injection of an injectant into them are performed. Press fit can be performed.

Next, a second embodiment of the open tunnel excavator of the present invention will be described with reference to FIGS. However, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the rock drilling apparatus C according to the second embodiment, a multi-function rock drill 23 and a moving mechanism D for moving the rock drill 23 are disposed above the beam front side portion 10.

That is, reference numeral 37 denotes a support frame placed on the front side 10 of the beam. It has a lower end at the beam front side 10
Two supporting frame members 38 fixed to the side walls 10a, 10a of the
A front frame 37 'having an arc-shaped guide rail L' provided between the upper ends of the support frame members 38, and a rear frame having an arc-shaped guide rail L "provided between the upper ends of the support frame members 38, 38. The body 37 ″ is disposed at a required interval in the excavation direction α1, that is, in the front-rear direction (FIGS. 6 to 8).

Numeral 39 denotes a movable support having a flat rectangular shape, and running rollers 40, 40 disposed on the lower surface of the front end thereof are disposed on the upper surface of the guide rail L 'of the front frame 37' and on the lower surface of the rear end. The running rollers 40, 40 are placed on the upper surface of the guide rail L "of the rear frame 37", respectively, and along the two guide rails L ', L ", a direction orthogonal to the digging direction α1 of the open tunnel excavator 5. It can move to α3.

At the upper ends of the supporting frame members 38, 38 of the front and rear frame members 37 ', 37 ", moving motors M, M for rotating the gears 41, 41, are mounted. A plurality of guide rollers 42 are arranged at regular intervals on the lower surface of the rails L 'and L ".

Reference numeral 43 denotes a roller chain, and gears 41, 41
Both ends 43a, 43a are connected to both ends of the movable support table 39, and the roller chains 43, 43 are guided by the guide rollers 42.

The movable support table 39 is moved along the guide rails L ', L ", in other words, in the direction α1 of the open tunnel excavator 5 in accordance with the forward / reverse rotation of the moving motor M.
Reciprocate in a direction α3 perpendicular to the direction.

A rotatable base 44 is rotatably fitted to the movable support base 39, and a pair of lift yokes 45, 45 each having a lower end fixed to the rotatable base 44. It is erected. In addition, lift yoke 4
A base end of a guide mount 46 on which the guide shell 34 is placed is supported at the upper end of the guide mounts 45 and 45 so as to be tiltable in a vertical plane. A tilting jack 47 is provided between the tilting jack 44 and the tilting jack 47. Reference numeral 48 denotes a rotation motor for driving the rotation base 44 to rotate.

The multi-function rock drill 23 turns and tilts at an arbitrary turning position in accordance with the rotation drive of the rotation motor 48, the expansion and contraction of the tilting jack 47, and the rotation drive of the movement motor M. The tunnel excavator 5 reciprocates in a direction α3 orthogonal to the excavation direction α1.

Of course, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention. That is, for example, as a multi-function rock drill, not only the above-described columnar compacted body is formed by an injecting agent, but may be a machine that penetrates a crack in the ground to increase the adhesive force of the portion, It may be one capable of driving a steel pipe pile or the like.

[0038]

As is apparent from the above description,
In the open tunnel excavator of the present invention, a rock drilling device that supports a multifunctional rock drill so as to be able to pivot and tilt is mounted on a main beam so as to be slidable in a tunnel axial direction or a direction crossing the tunnel. Therefore, besides turning and tilting at the supporting position of the above-mentioned multi-function rock drill, it can be used by sliding in the tunnel axis direction or the direction intersecting with it,
The tunnel ground can be reinforced in a much wider area than before, and it becomes easy to secure the excavation reaction force by the gripper.
Therefore, the tunnel excavation efficiency can be remarkably improved, and the total cost of tunnel construction can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the open tunnel excavator of the present invention.

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 is an enlarged side view of a main part.

FIG. 4 is a sectional view taken along line II-II of FIG.

FIG. 5 is an explanatory diagram showing a state of reinforcement of a tunnel ground by a rock drilling device.

FIG. 6 is a side view of a second embodiment of the open tunnel excavator of the present invention.

FIG. 7 is an enlarged side view of a main part of the above.

FIG. 8 is a sectional view taken along line III-III of FIG. 6;

FIG. 9 is a side view of a conventionally known open tunnel excavator.

[Explanation of symbols]

 23 Multi-function rock drill A Rock drill C Rock drill 8 Main beam B Moving mechanism D Moving mechanism 10 Beam front side 24 Support frame L Guide rail L 'Guide rail L "Guide rail 25 Movable support member 30 Spline shaft 31 Elevation Table 39 Movable support table 13 Gripper 9 Propulsion unit

Claims (7)

[Claims] 1. A rock drilling device that supports a multi-function rock drill so as to be capable of turning and tilting is mounted on a main beam so as to be slidable in a tunnel axial direction or a direction crossing the tunnel. And open type tunnel excavator. 2. The open tunnel excavator according to claim 1, wherein the rock drilling device comprises a multi-function rock drill and a moving mechanism on which the rock drill is mounted. 3. The rock drilling apparatus according to claim 1, wherein the rock drilling apparatus is separately mounted on both left and right sides of the main beam in a state where the rock drilling apparatus slides vertically in a direction intersecting with the tunnel axis direction. 2. The open tunnel excavator according to 2. 4. A moving mechanism supports a movable support member on a guide rail of a support frame fixed to the front side of the beam, and enables the movable support member to slide in the tunnel axial direction. Screw the lifting platform onto the spline shaft
4. The open tunnel excavator according to claim 2, wherein the excavator is slidable in a direction intersecting the axial direction of the tunnel. 5. A state in which the rock drilling apparatus slides in a direction intersecting the tunnel axis direction in an arc along the pit wall.
The open tunnel excavator according to claim 1 or 2, wherein the open tunnel excavator is mounted above the main beam. 6. A moving mechanism, wherein a movable support is mounted on an arc-shaped guide rail fixed to a front side of a beam, and is slidable in a direction intersecting with a tunnel axis direction. Item 4. An open tunnel excavator according to item 2 or 3. 7. The main beam according to claim 1, wherein two propulsion units including grippers are arranged in series one after another at a required interval. Open tunnel excavator.