JP2001082100A - Tunnel boring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel boring machine unnecessary for providing a width-enlarging part inside the tunnel, capable of reducing the muck waiting time, and capable of enhancing the boring speed. SOLUTION: Tracks 20 and 12 are laid respectively inside the respective half-sections 18, 19 dividing the inner hollow section of a tunnel 19 into right and left two parts, and the succeeding trucks are run on the track 20 inside the half-section 18 on one side, and the muck conveying truck and materials conveying truck 29 are selectively run either on the track 20 inside the half- section 18 on one side or on the track 21 inside the half section 19 on the other side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator and, more particularly, to an improvement in a method of discharging excavated waste in a small-diameter tunnel excavator.

[0002]

2. Description of the Related Art Conventionally, a tunnel excavator (T
The following method is known as a method of discharging the excavation waste in BM). (1) A method in which a track is laid in a tunnel, and the soil is removed by a trolley for traveling on the track. (2) A method in which a track is laid in a tunnel and the soil is removed by a shuttle car running on the track. (3) A method of discharging soil using a continuous belt conveyor that is automatically drawn out as the excavation progresses. (4) A method of discharging soil by fluid transport using a mud pipe and a drain pipe.

[0003] Of these earth removal methods, the methods (1) and (2), which are typical earth removal methods, will be described in more detail with reference to the drawings.

FIGS. 4 (a) and 4 (b) show a tunnel excavator according to (1) of a soil discharging method using a slippery trolley (in the drawings, a middle part of a succeeding bogie is omitted. ing.). This conventional tunnel excavator 100
, The traction beam 10
2 and a number of trailing bogies 1 via pulling wires 103 and the like.
04 is towing. The trailing carriage 104 has a gate-shaped structure, and has four tracks 1 laid in a tunnel.
05, 106, 107, and 108, the outermost two lines 105 and 108 are run, and a belt conveyor 109 for slip transport is provided above the tracks 105 and 108. In addition, a slip transport trolley 110 and a material transport trolley 111 are disposed so as to travel along the inner space of the succeeding trolley 104 along the inner tracks 106 and 107. The shears are loaded from the discharge end 109a of the belt conveyor 109. In the middle- and large-section tunnels, the tracks 105, 106, 107, and 108 are arranged at equal intervals. When a plurality of slip transport trolleys travel in the tunnel, one of the slips is used by using a rail switching point. The transport trolley travels on the lines 105 and 106, and the other transport trolley travels on the tracks 107 and 108, respectively, so that the trolleys can pass each other. The rotation rate of the transport trolley is increased to improve transport efficiency. I have to.

[0005] On the other hand, FIG. 5 shows a tunnel excavator according to (2) an earth removal method using a shuttle car (a front part of the tunnel excavator is not shown). In the conventional tunnel excavator 200, a large number of trailers 201 are towed behind the excavator body (not shown) via a tow beam, a tow wire and the like. This trailing bogie 201 has a gate-shaped structure similarly to the tunnel excavator 100 shown in FIG.
The vehicle runs on outermost tracks 202 and 205 laid in a tunnel, and a belt conveyor 206 for transporting shears is provided above the tracks 202 and 205. Further, the inner space of the trailing bogie 201 is changed to the inner tracks 203 and 204.
A shuttle car 207 and a material transport trolley (not shown) are arranged so as to travel along
7, a slip is loaded from the discharge end 206a of the belt conveyor 206 for slip conveyance. Here, the shuttle car 207 has a length of usually 20 to 30 m, and has a chain conveyor 20
8 is mounted, and the belt conveyor 206
After the shelves have been loaded from the carry-out end 206a to a predetermined location, the chain conveyor 208 is driven so that the shelves are evenly loaded in the internal space.

[0006]

However, in any of the above-mentioned methods using the trolley for transporting shears and the method using a shuttle car, in a tunnel having a small cross section with a small space, the vehicle for discharging is a single-rail system. In particular, when performing long-distance excavation, it is necessary to reciprocate the sleigh truck or shuttle car between the slip loading position and the wellhead, so that a so-called slip waiting time occurs and the soil is discharged. There is a problem that the efficiency is extremely low. In order to solve this, it is necessary to provide a double track section (evacuation section) in the tunnel and make the round-trip vehicles pass each other in that section. Is required, and extra work and time are required.

[0007] On the other hand, the method of (3) for discharging soil by a continuous belt conveyor is not suitable for excavation of a small-diameter tunnel because the equipment for stretching the belt conveyor is large and requires a lot of space. It is.

[0008] In the method (4), the earth removal method by fluid transportation requires muddy water treatment equipment and its control equipment outside the mine, which increases the cost and limits the particle size of excavated waste. In the case of long-distance transportation, there is a problem that a trouble easily occurs in the pipeline.

The present invention has been made in view of such circumstances, and it is not necessary to provide a widened portion in a tunnel having a small cross section, and it is possible to shorten a slip waiting time and improve a digging speed. It is an object of the present invention to provide a tunnel excavator that can be operated.

[0010]

To achieve the above object, a tunnel excavator according to the present invention comprises:
Tracks are laid in each half section, which divides the empty section inside the tunnel into two parts, and the trailing truck runs on the track in one half section. However, the vehicle travels selectively on a line in one half section and on a line in the other half section.

According to the present invention, the trailing bogie travels on the track in the half section of the tunnel so that it can be accommodated in one half section of the inner section of the tunnel. In the traveling section and the shear loading section of the subsequent bogie, the material transporting bogie travels on a track in the other half cross section adjacent to the half cross section in which the subsequent bogie travels, thereby causing interference with the subsequent bogie. In the rear section of the tunnel except for the traveling section of the trailing bogie, etc., it is possible to use the space for both the one half section and the other half section where the trailing truck travels to use the truck and the material transport for slip transport. The reciprocating vehicles of the trolley can pass each other. Thus, even in a small-diameter tunnel, the traveling path of the trolley for slip transport can be double-tracked without providing a widened section, so that the slip waiting time is shortened, thereby improving the soil discharging efficiency and improving the excavation speed. And the construction cost can be reduced.

In the present invention, the belt conveyor for slip transport arranged in the upper space of the succeeding bogie has a relay section between the front belt conveyor and the rear belt conveyor, and at this relay section, the discharge end of the front belt conveyor is connected. It is located above the center of the cross section inside the tunnel in the left and right direction,
It is preferable that the carry-in end of the rear belt conveyor be arranged in a lower space of the succeeding bogie. By doing this,
Even in a small-diameter tunnel excavator in which it is particularly difficult to arrange various devices in the cross section of the tunnel, the belt conveyor for shear conveyance can be effectively arranged.

[0013]

Next, a specific embodiment of a tunnel excavator according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a tunnel excavator according to one embodiment of the present invention, and FIGS. 2 (a) to 2 (d) are sectional views taken along line AA of FIG. A B sectional view, a CC sectional view, and a DD sectional view are shown, respectively.

The tunnel excavator 1 of the present embodiment has a
It relates to an excavator that excavates a small diameter tunnel of up to 2.5 m class. In this tunnel excavator 1,
A main frame 2 is disposed at a front portion, and a gripper frame 3 is disposed behind the main frame 2. In order to generate a propulsive force on the cutter head 4 during excavation, the main frame 2 and the gripper frame 3 are connected to each other. A lattice-type thrust jack 5 is arranged between them. The gripper frame 2 is connected to a leading end of a traction beam (not shown), and a rear end of the traction beam is connected to a front end of a trailing bogie (No. 1 bogie) 6 at the forefront.

In this embodiment, the trailing bogie is No. 1
From the dolly 6 It is composed of a total of ten trucks up to ten trucks 15, and each truck is connected to each other by a towing wire and / or a towing bracket 16. Incidentally, in the present embodiment, No. One truck 6 is used as the equipment storage area, and N
o. The two bogies 7 are provided with an operator seat and an oil tank, a hydraulic pump, and the like. 3 bogies 8
No. is a trolley dedicated to the connecting portion of the belt conveyor as described later. 4 bogie 9 and No. A dust collector and the like are mounted on the five trucks 10. A water treatment tank for a dust collector, a control panel, and the like are mounted on the six trucks 11. 7 bogies 12 are N
o. As in the case of the three carriages 8, the carriages are dedicated to the connecting portion of the belt conveyor. No. 8 truck 13 is equipped with an inverter board. A transformer is mounted on the 9 truck 14,
No. The ten carts 15 are used as cable storage areas.

In the tunnel 17, two sets (double tracks) of lines 20 and 21 are laid one by one in each of the half sections 18 and 19 obtained by bisecting the inner section of the tunnel, and one of them (in the present embodiment, the propulsion direction). On the other hand, the trailing bogies 6 to 15 are run on the track 20 having the half section 18 (left side) so as to be accommodated in the half section 18.

The shear excavated by the rotation of the cutter head 4 is taken in by a hopper 22 arranged substantially in the center of the tunnel 17 on the back side of the cutter head 4, and is conveyed backward by a belt conveyor for shear conveyance. Is done. The belt conveyor for shear conveyance is No. 1 belt conveyor 23,
No. 2 belt conveyor 24 and no. It is constituted by three belt conveyors composed of three belt conveyors 25.

No. The one-belt conveyor 23 is driven by a motor pulley provided at a rear end thereof, a front end thereof is located below the hopper 22 to receive excavation shears from the hopper 22, and a rear end side is lifted upward to be N
o. 1 truck 6 and No. N through each upper part of the two carriages 7
o. It extends horizontally to a position above the three carriages 8.

No. The front end of the two-belt conveyor 24 has the aforementioned No. 2 belt conveyor. No. 1 which is a lower position offset to the left with respect to the rear end of the belt conveyor 23, and which is exclusively used for the belt-conveyor transfer section. 3 is supported on a trolley 8, the rear end of which is lifted upward and the tunnel 1
No. 7 is displaced toward the center, 4 bogie 9, No. 5
The cart 10 and No. N through each upper part of the six carriages 11
o. It extends horizontally to a position above the seven carriages 12.
Here, the above No. Rear end of 1 belt conveyor 23 and N
o. A chute-shaped hopper 26 for guiding excavation shears is disposed between the front end of the two-belt conveyor 24. In addition, the said No. The two-belt conveyor 24 is also driven by a motor pulley provided at the rear end.

No. No. 3 belt conveyor 25 has the front end No. 3. A hopper 27 is provided at the rear end of the two-belt conveyor 24.
N connected to the transfer section of the belt conveyor
o. The rear end is lifted upward and displaced toward the center of the tunnel 17,
No. 8 bogie 13, No. 9 cart 14 and No. 10
Passing above each of the carts 15, the No. It extends horizontally to the rear position of the ten carts 15. This No. In the case of the three-belt conveyor 25, the drive unit 28 is provided with a No. Arranged on the seven bogies 12 so that there is no need to install an extra obstacle near the rear end, which is the slip loading position.

On the other hand, as for the material transporting trolley 29 for transporting various materials to the front of the tunnel excavator 1, at least in the traveling section of the following trucks 6 to 15 and the slip loading section 31, the following trucks 6 are used. 15 travels on a track 21 laid in the other half section 19 adjacent to the one half section 18 on which the vehicle travels.
In this manner, the material transporting cart 29 can travel freely on the side of the following trucks 6 to 15 without interfering with the following trucks 6 to 15 and can feed a desired material forward. In addition, with regard to the slip transport trolley 30, at least in the slip loading section 31, the trailing bogies 6 to 15 travel in one half section 18 where they travel, and the No. Shears carried out from the carry-out end of the three-belt conveyor 25 are received and carried to the wellhead.

Further, when returning to the exit, the material transporting cart 29 and the slip transporting trolley 30 are located in the rear section of the tunnel 17 excluding the traveling section of the following trucks 6 to 15 and the slip loading section 31. Either the returning vehicle or the outgoing vehicle is retracted from the traveling line 21 in the other half section 19 to the line 20 in the one half section 18 where the following bogies 6 to 15 travel, and then Since it can be passed by the material transporting trolley 29 and / or the shear transporting trolley 30 moving forward, the tunnel 1
Without providing a widened section in 7, the traveling path of the slip transport trolley can be double-tracked. In this way, in the section where the full slip transport trolley 30 is returning to the wellhead, it is possible to use the traveling track of the succeeding bogie to pass by the next slip transport trolley 30. In this case, the slip waiting time can be extremely reduced. Therefore, the earth discharging efficiency can be improved, the excavation speed of the tunnel excavator 1 can be improved, and the construction cost can be reduced because the widening work is unnecessary.

FIG. 3 shows a partial longitudinal sectional view (a) of a tunnel excavator according to another embodiment of the present invention and an EE sectional view (b) thereof.

This embodiment relates to a tunnel excavator for excavating a tunnel having a slightly larger diameter (excavation diameter of 2.5 to 3 m class) than the previous embodiment. This embodiment is basically the same as the previous embodiment except that the structure of the relay section of the belt conveyor for shear conveyance is different.
That is, in the above embodiment, No. 2 belt conveyor 2
4 and no. Each front end of the three-belt conveyor 25 is a No. 3 dedicated to a belt-conveyor transfer section. 3 bogie 8 and No.
Although it is configured to be supported on each of the seven carriages 12, in the present embodiment, there is no subsequent carriage dedicated to the connecting portion of the belt conveyor. No. 2 belt conveyor 24 ′ is used for installation of various devices and the like. Fixed to the upper part of the three carriages 8 'and N
o. The rear end of the 1-belt conveyor 23 'is designated by its No. It is configured to be located above the two-belt conveyor 24 '. In addition, No. 2 belt conveyor 24 'and N
o. A similar structure is adopted in a relay section with a two-belt conveyor (not shown).

If there is some margin in the diameter of the tunnel, the relay section of the belt conveyor can be structured as in this embodiment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a tunnel excavator according to one embodiment of the present invention.

FIGS. 2 (a) to 2 (d) respectively show AA of FIG. 1;
It is sectional drawing, BB sectional drawing, CC sectional drawing, DD sectional drawing.

FIG. 3 is a partial longitudinal sectional view (a) of a tunnel excavator according to another embodiment of the present invention and an EE sectional view thereof (b).

FIG. 4 is a longitudinal sectional view (a) and a PP sectional view (b) showing a conventional example using a shear transport minecart.

FIG. 5 is a longitudinal sectional view (a) showing a conventional example using a shuttle car and a QQ sectional view thereof (b).

[Explanation of symbols]

 No. 1 tunnel excavator 6-15 No. 1 to No. No. 10 bogie (following bogie) 17 Tunnel 18, 19 Half section 20, 21, Track 22, Hopper 23, 23 'No. No. 1 belt conveyor 24, 24 'No. 2 belt conveyor 25 No. 3 belt conveyor 26, 27 Hopper 28 Drive unit 29 Material transport trolley 30 Shelf transport trolley 31 Shelf loading section

Claims (2)

[Claims] 1. A track is laid in each half section obtained by bisecting an inner section of a tunnel into right and left, and a trailing bogie runs on a track in one half section. And a material transporting trolley that selectively travels on a track in one half section and on a track in the other half section. 2. A slip conveyor belt conveyor disposed in an upper space of the succeeding bogie has a relay section between a front belt conveyor and a rear belt conveyor. In this relay section, a discharge end of the front belt conveyor is located in a tunnel. 2. The tunnel excavator according to claim 1, wherein the tunnel excavator is disposed at an upper portion near the center in the left-right direction of the empty section, and a carry-in end of a rear belt conveyor is disposed in a lower space of the succeeding bogie.