JP3451531B2 - Open tunnel excavator - Google Patents

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 type tunnel excavator for propelling and excavating a gripper by using propulsive reaction force.

[0002]

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

However, when the ground to be excavated is weak or the degree of crushing is advanced, the gripper may slip into the ground and the necessary propulsive reaction force may not be secured from the tunnel tunnel wall. .

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 the cutter head 2 of the open type tunnel excavator 1, and the rock drill 3 is softened. It is known to perform a predetermined propulsion excavation while pressurizing and injecting a required injecting agent through an injection hole drilled in a natural ground to improve and reinforce the natural ground where a necessary reaction force can be obtained.

[0005]

However, the rock drilling machine 3 described above is used.
Has a very narrow drilling range because it can be simply swung at the mounting position to appropriately drill holes at a plurality of positions.
Therefore, there is a drawback that the open type tunnel excavator 1 itself must be moved to a required position in order to expand the drilling range in the tunnel axis direction, for example.
An object of the present invention is to provide an open type tunnel excavator that eliminates such drawbacks.

[0006]

The present invention according to claim 1
The Punn type tunnel excavator is fixed to the beam front side 10.
The movable support member 2 is attached to the guide rails L of the support frame 24.
When 5 is supported so as to be reciprocally movable in the excavation direction α1
Both of them are spline shafts provided vertically on the movable support member 25.
30. The lifting table 31 is reciprocally movable in the vertical direction and screwed.
The combined moving mechanism B and the lifting / lowering table 31 can be swung and tilted.
Equipped with a rock drilling device consisting of a multifunctionally supported rock drill
I am.

The open tunnel of the present invention according to claim 5
The excavator is mounted on the support frame 37 mounted on the beam front side portion 10.
A movable support is attached to the arc-shaped guide rails L'and L "
39 on the mine wall surface in the direction α3 orthogonal to the excavation direction α1
A moving mechanism D mounted so as to be capable of reciprocating in an arc along
And a rotary base rotatably fitted to the movable support base 39.
Supported on the base 44 and between the rotary base 44
The tilting jack 47 installed on the
A rock drilling device C including a functional rock drilling machine 23 is provided.

[0008]

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

Reference numeral 5 denotes an open type tunnel excavator, which has 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 beam front side portion 10 of the main beam 8 extending to the rear side, and the rear propulsion unit 9 is arranged on the beam rear side portion 11 (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 each other to form the main beam 8, and the side walls 10a, 10 facing each other.
Guide shoes 12 are formed on the lower edges of 0a, 11a, and 11a (FIGS. 1 and 2).

In the propulsion unit 9, the beam front side portion 10 and the rear side portion are provided on the upper part of the machine frame 15 in which a pair of pressing jacks 14 and 14 for pressing the grippers 13 and 13 to the both sides of the tunnel wall S are installed. Guide shoe 12, 12 of part 11
The guide plates 17, 17 having the slide shoes 16, 16 fitted therein are erected on the pressing portion body 18 and the lower surfaces of the front end portions of the beam front side portion 10 and the rear side portion 11 respectively. It consists of a flat T-shaped mounting base 19 and four propulsion jacks 20 installed between the mounting base 19 and brackets 18a protruding from the front of the machine frame 15 and extending the propulsion jacks 20. According to the drive out or degeneration,
The pressing portion 18 is moved to the front side or the rear side along the guide shoes 12, 12. Reference numeral 21 is a rear supporter such as a hydraulic jack that presses against the bottom of the tunnel wall S to maintain the main beam 8 in a horizontal position.

Inside the main beam 8, the transport start end 2
2a is arranged in the cutter head 6 so as to project, and the carry-out conveyor 22 is arranged in which the transport end portion 22b is projected further rearward than the rear end portion. I try to carry it out backwards.

The rock drilling device A comprises a multi-functional rock drilling machine 23 and a moving mechanism B for the multifunctional rock drilling machine 23, and is provided separately on the left and right sides of the beam front side portion 10. The details are as follows.

In the moving mechanism B, 24 is a support frame fixed to the side wall 10a of the beam front side portion 10, which is between the upper end portions and the lower end portions of the vertical frame members 24a, 24a arranged with a required interval. The guide rails L, L are parallel to each other in the space between the guide rails L and L, and are laterally laid horizontally (FIGS. 1, 3, and 4).

25 is supported by the guide rails L, L.
A movable support member that is, the upper and lower ends of the inner surface, so as to sandwich the opposing guide rails L 4 one roller 26 ... are arranged, also, to the middle part, the gear 2
A moving motor M in which 7 is fixed to a drive shaft is attached.

Brackets 29 and 29, on which a roller chain 28 that meshes with the gear 27 of the moving motor M is stretched, are arranged in the middle of the vertical frame members 24a and 24a. In accordance with the reverse rotation, the movable support member 25 is moved in the direction of excavation of the open-type tunnel excavator 5 (tunnel axial direction).
Direction) [alpha] 1 (hereinafter, the excavation forward [alpha] 1 ', Ru is reciprocated the excavation reverse direction) of [alpha] 1 ".

A spline shaft 30 is rotatably provided vertically on the outer surface of the movable support member 25. The spline shaft 30 moves up and down (vertical direction) in accordance with the rotation of the spline shaft 30, that is, in a direction intersecting the excavation direction. An elevating table 31 that reciprocates is screwed.

The lift table 31 is rotatable in a vertical plane.
Support 32 is provided, and a hydraulic motor (not shown) for rotating the support 32 in the forward and reverse directions is also incorporated . The said support 32, the guide shells 34, the proximal end 34
It is tiltably supported at a (FIG. 4). That moth
Idosheru 34 is configured to tilt motion by the driving of the tilting jack 35 which is bridged between the front end portion 34b of one side and the guide shell 34 of the support portion 32, the supporting portion 32
It is designed to turn with the rotation in the vertical plane .

The multi-functional rock drill 23 is provided with a predetermined striking mechanism, a rod rotating mechanism, and a propulsion mechanism which moves along the guide shell 34 , and is equipped with a drilling press-fitting rod 23a detachably . Connect the end 33 to the guide sheave.
It is supported by Le 34.

The hole press-fitting rod 23a forms, for example, two passages through which a mixed liquid such as a hardening agent and a quick-setting agent and a main liquid such as cement milk are separately circulated, and the two passages are ejected. It is formed by forming two spouts and required bits at the tip. As the hole press-fitting rod 23a, Japanese Patent Publication No. 7-6869 developed and provided by the applicant of the present invention as a device directly used for carrying out the ground improvement and stabilization method.
There is one described in JP-A-6.

The multi-functional rock drill 23 (hole punch press-fit rod 2)
3a) reciprocates in the excavation direction α1 and the vertical direction α2 in accordance with the forward and reverse rotations of the moving motor M and the spline shaft 30, and rotates the support portion 32 in the forward and reverse directions to form a vertical surface centered on the support portion 32. It swivels in and tilts at an arbitrary swivel position by the extension / contraction drive of the tilting jack 35.

Next, a method of reinforcing the tunnel ground by using the rock drilling device having the above construction will be described. To stop the open tunnel excavator 5 and drill the injection hole Sa at a required position on the tunnel wall surface S, the injection holes Sa and Sa having a desired depth are simultaneously formed by the hole press-fitting rods 23a and 23a. Drill holes.

After that, the hole press-fitting rods 23a, 23a
Is drawn out while feeding a predetermined injecting agent to it, and the injecting agent is injected into the ground to form a plurality of columnar consolidated bodies Sb, Sb at desired locations on the tunnel wall surface S.
The holes 23a, 23a do not necessarily have to be moved simultaneously, and they may be moved separately, or only one of them may be moved.

While the open type tunnel excavator 5 is being advanced, the injection hole S is provided at a required position on the wall surface S of the tunnel.
To drill a, the movable supporting members 25 are moved by the moving mechanisms B, B so that the forward tunneling direction α of the open-type tunnel excavator 5 is advanced.
At the same speed as the digging speed to 1 ', but in the digging reverse direction α
Drilling press-fitting rods 23a, 23a while moving to 1 "
Is inserted into the tunnel wall surface S, an injection hole having a required depth is drilled, and columnar solidified bodies Sb and Sb are formed in the same manner as above.

That is, the multifunctional rock drills 23, 23 are tunneled by moving them in the reverse excavation direction α1 ″ at the same speed as the excavation forward direction α1 ′ in the open type tunnel excavator 5. By holding the open state of the wall surface S in a stopped state, even when the open type tunnel excavator 5 is being advanced, it is possible to perform the drilling and the injection of the same into the holes in the same manner as when the open type tunnel excavating machine 5 is stopped. Can be pressed.

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

The rock drilling apparatus C of the second embodiment, the moving mechanism D of the multi-function Breakers 23 moves this is arranged on the upper side of the beam front portion 10.

That is, 37 is a support frame mounted on the beam front side portion 10. It has a lower end with a beam front side 10
Beam left and right sides of the side walls 10a, and arcuate 'front frame 37 formed by bridging a' guide rail L between the upper end portions of the two support frame members 38 and 38 fixed to 10a, also the lower end of the
Fixed to the left and right side walls 10a, 10a of the front side portion 10 .
Between the upper end portions of the two support frame members 38, 38 and a "side frame 37 after formed by bridging the" arcuate guide rail L, excavation direction
They are arranged at α1 at required intervals (FIGS. 6 to 8).

Numeral 39 is a movable support base having a flat rectangular shape.
Means that the traveling rollers 40, 40 disposed on the lower surface of the front end are guided to the upper surface of the guide rail L'of the front frame 37 ', and the traveling rollers 40, 40 disposed on the lower surface of the rear end are guided to the rear frame 37 ". The rails are respectively placed on the upper surface of the rail L ″, and along both guide rails L ′ and L ″, arc-shaped along the mine wall surface in the direction α3 orthogonal to the excavation direction α1 of the open tunnel excavator 5.
It can be moved back and forth .

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 and driving the gears 41, 41 are attached and guides are provided. On the lower surface of the rails L'and L ", a plurality of guide rollers 42 are arranged in a row at regular intervals.

Reference numeral 43 denotes a roller chain, which is a gear 41, 41.
Both ends 43a, 43a are connected to both ends of the movable support 39 while being stretched between them, and the roller chains 43, 43 are guided by the guide rollers 42.

The movable support base 39 follows the forward and reverse rotations of the moving motors M ... along the guide rails L'and L ", in other words, the excavation direction α1 of the open tunnel excavator 5.
It reciprocates in a direction α3 orthogonal to.

A rotary base 44 is rotatably fitted to the movable support base 39, and a pair of lift yokes 45, 45 having lower ends fixed thereto are mounted on the rotary base 44. Is erected. Also, the lift yoke 4
The multi-functional rock drill 23 is supported at the upper ends of 5, 45.
The base end portion of the guide mount 46 on which the guide shell 34 is placed is tiltably supported in the vertical plane . further,
The lower surface of the tip of the guide mount 46 and the rotation base 44
And bridged the tilting jack 47 between, the multi-function drilling
The machine 23 and the guide shell 34 to the guide mount 46.
Everything is tilted . Reference numeral 48 is a rotation motor that rotationally drives the rotation base 44.

The multi-functional rock drill 23 turns and tilts at an arbitrary turning position in accordance with the rotation driving of the rotation motor 48, the extension / contraction of the tilting jack 47, and the rotation driving of the moving motors M ... The tunnel excavator 5 reciprocates in a direction α3 that is orthogonal to the excavation direction α1.

Of course, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention. That is, for example, the multifunctional rock drilling machine is not limited to the one in which the above-mentioned columnar solidified body is formed by an injecting agent, but it may be one that permeates a crack in the ground to increase the adhesive force of that portion, and Alternatively, a steel pipe pile may be driven or the like.

[0036]

As is apparent from the above description,
According to the open tunnel excavator of the present invention according to claim 1.
For example, on the guide rail of the support frame fixed to the front side of the beam,
The movable support member is supported so that it can move back and forth in the excavation direction.
And a spline vertically installed on the movable support member.
The lift base was screwed onto the shaft so that it could move back and forth in the vertical direction.
It is supported by the moving mechanism and the lift table so that it can swivel and tilt.
The above-mentioned multifunctional rock drill
Swivel and tilt at its support position and move
Since it can be moved by a moving mechanism and used, compared to conventional
The tunnel ground can be reinforced in an extremely wide range,
It is easy to secure the reaction force for excavation by the hopper. Therefore,
Tunnel excavation efficiency can be remarkably improved and total tons can be obtained.
It is possible to reduce the cost of building the channel.

Further, the open type door of the present invention according to claim 5 is
According to the tunnel excavator, the support placed on the front side of the beam
The movable support base is excavated on the arc-shaped guide rails installed on the frame.
Moves back and forth in an arc shape along the mine wall in the direction orthogonal to the advancing direction.
It is movable and placed on the movable support and the movable support.
It is supported on a rotation base fitted rotatably, and
Tilt by a tilting jack installed between the rotating base
Equipped with a rock drilling device consisting of a multifunctional rock drill
Therefore, the above multifunctional rock drill is turned and supported at its supporting position.
And tilt it and move it using the moving mechanism.
Because it is possible, it is possible to use a much wider range of tunnel ground than before.
It is possible to reinforce the
It will be easier. Therefore, the tunnel excavation efficiency is significantly improved.
It is possible to reduce the total tunnel construction cost.
It is possible.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line I-I of FIG.

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 view 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 type tunnel excavator of the present invention.

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

8 is a sectional view taken along line III-III in FIG.

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

[Explanation of symbols]

23 Multi-functional rock drilling machine A Rock drilling device C Rock drilling device 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 Lifting Platform 39 Movable support platform 13 Gripper 9 Propulsion unit α1 excavation direction α3 Direction orthogonal to excavation direction

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-8-291690 (JP, A) JP-A 63-289197 (JP, A) JP-B 6-6871 (JP, B2) Jpn. 43278 (JP, Y2) Patent 2538346 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/10

Claims (7)

(57) [Claims] 1. A guide rail of a support frame fixed to the front side of the beam.
The movable support member can be reciprocated in the excavation direction.
Supported vertically, and vertically mounted on the movable support member.
The lifting platform can be vertically reciprocated on the plane axis.
It is possible to swivel and tilt with the moving mechanism that is screwed and the above-mentioned lift.
Equipped with a rock drilling device consisting of a multifunctional rock drill supported by
An open type tunnel excavator that is characterized by 2. The support frame is arranged with a required space maintained.
Of the above-mentioned vertical frame member between the upper end and the lower end.
The drail is installed horizontally, and is characterized by the above-mentioned.
1. The open type tunnel excavator described in 1. 3. The support for supporting the lift base in a vertical plane.
Section, the supporting section of which is the multifunctional rock drill
The base end of the guide shell that supports the
And one side of the support and the guide
Tilt the guide shell between it and the tip of the shell.
A tilting jack is installed over the tilt jack.
Or the open type tunnel excavator described in 2. 4. The rock drilling device comprises right and left sides of the beam front side portion.
Claims that are provided separately on both sides
The open type tunnel excavator according to 1, 2, or 3. 5. A support frame mounted on the front side of the beam.
A movable support is mounted directly on the arc-shaped guide rail in parallel with the excavation direction.
It is possible to move back and forth in an arc shape along the mine wall in the intersecting direction.
Mounted on the movable support and the movable support table
Supported on a combined rotating base, and the rotating base
The tilting jack installed between the
It features a rock drilling device consisting of a multifunctional rock drilling machine.
An open-type tunnel excavator to collect. 6. The support frame is provided on both left and right sides of a beam front side portion.
An arcuate guide is provided between the upper ends of the two supporting frame members fixed to the side wall.
The front side frame with the drails installed and the front side of the beam
Between the upper ends of the two supporting frame members fixed to the left and right side walls
In the excavation direction with the rear side frame body where the arc-shaped guide rail was installed
6. The storage device according to claim 5, characterized in that they are arranged at required intervals.
This is an open tunnel excavator. 7. The multi-functional rock drill comprises a mixed liquid and a main liquid.
Form two passages for separate circulation and spray them
Form the two ejection ports and the required bit at the tip
Specially equipped with a drilling press-fitting rod
O of claim 1, 2, 3, 4, 5 or 6
Pun-type tunnel excavator.