JPH10292786A - Tunnel boring machine and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a common control of driving and to obtain the strength of a main beam by arranging two driving units of the same structure where beam driving jacks are provided between wall pressers and the main beam. SOLUTION: A main beam 14 is extended behind a mount 13 supporting a cutter head 12 rotatably, two driving units B, B' of the same structure are arranged in the main beam 14 in series. The driving units B, B' are composed of wall pressers 17 and beam jacks 23. The wall pressers 17 makes it possible to fix grippers 18b of driving rods 18a and press the grippers 18b to the internal wall of a tunnel by extending the wall pressing jacks 18. The boring machine is driver while pressing the grippers 18b of the front driving unit B and the rear driving unit B' to the sides of a tunnel wall alternately by extending and retracting the driving rod 23a of the beam jack 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavation device and a tunnel excavation device capable of excavating a tunnel in accordance with the strength of the ground.

[0002]

2. Description of the Related Art A conventional tunnel digging device is disclosed in Japanese Patent Publication No. 6-6870. In this tunnel excavation device, a main beam 2 is extended rearward from a rear portion of a mount 1 supporting a cutter head at a central portion in a tunnel radial direction, and the main beam 2 is independently provided inside and outside the main beam 2. An inner guide 3 and an outer guide 4 that are slidable on the top 2 are provided respectively (FIG. 13).

The outer guide 4 is provided with a front gripper 6 for pressing the tunnel wall surface via a front gripper jack 5 which expands and contracts in the radial direction of the tunnel, and is connected between the outer guide 4 and the mount 1. And two first propulsion jacks 7, 7 that extend and contract in the front-rear direction.

The main beam 2 is provided at the rear of the inner guide 3.
A rear gripper supporting portion 8 that is more exposed is provided, and rear grippers 10 and 10 (one of which is not shown) for pressing a tunnel wall surface are provided via the rear gripper jack 9 that expands and contracts in the radial direction. Connects to mount 1 and expands and contracts 1
A second propulsion jack 11 is provided.

As described above, the two grippers 6, 1
0, the front gripper 6 presses the tunnel wall surface, and the first propulsion jacks 7, 7 are driven to extend while the rear gripper 10 is separated from the tunnel wall surface. In addition, the tunnel wall surface is pressed by the rear gripper 10, and the second propulsion jack 11 is driven to extend while the front gripper 6 is separated from the tunnel wall surface, so that continuous excavation can be performed.

[0006]

However, in the above conventional tunnel excavating device, the first propulsion jacks 7, 7 are not provided.
And the large propulsion jacks 11 having different strokes and capacities are mixed, so that they cannot be commonly driven and controlled. In other words, the first and second
For each propulsion jack, it is necessary to control the contents corresponding to these individually and synchronize them, so that their control system becomes complicated.

Furthermore, since the structure in which the inner guide 3 provided with the second propulsion jack 11 is slid with respect to the main beam 2 is employed, it is difficult to sufficiently secure the strength of the main beam 2. In addition, since the second propulsion jack 11 is provided in the inner guide 3, repair and maintenance when the second propulsion jack 11 breaks down is an extremely difficult operation involving disassembly thereof.

In addition, if the strength of the tunnel wall surface is weak and a sufficient reaction force cannot be obtained when only the front gripper 6 or the rear gripper 10 is pressed against the wall surface, excavation cannot be performed by the device. There is a disadvantage that.

According to the present invention, it is possible to perform excavation corresponding to the case where the strength of the tunnel wall surface is not sufficient, to facilitate repair and maintenance work in case of failure, and to make the strength of the main beam sufficient. It is another object of the present invention to easily control the respective parts corresponding to the tunnel wall surface when the excavation is performed when the strength is not sufficient, as well as when the strength of the tunnel wall surface is sufficient.

[0010]

The tunnel excavating device according to the present invention includes wall pressing jacks for pressing the grippers against the tunnel wall, and is slidably supported along the main beam. Two beam-propelling jacks 23, which are provided between the wall pressing member 17 and the main beam 14 and move the wall pressing member 17 and the main beam 14 relative to each other, have the same configuration. The propulsion units B and B 'are arranged in series outside the main beam 14 along the main beam 14.

According to the tunnel excavation method of the present invention, the gripper 18b of the front propulsion unit B of the two propulsion units B and B 'having the same configuration arranged in series outside the main beam 14 is provided outside the main beam 14. , 18b are separated from the tunnel wall Sa, and the excavation preparation work of pressing the grippers 18b, 18b of the rear propulsion unit B 'against the tunnel wall Sa, and in the state of this excavation preparation work, the rear propulsion unit B Excavation work for advancing the main beam 14 by the beam propulsion jacks 23, and the grippers 18b, 18b of the propulsion unit B on the front side by the tunnel wall S
a and presses the grippers 18b, 18b of the rear propulsion unit B 'away from the tunnel wall Sa. In the state of the preparatory excavation work, the beam propulsion jacks 23 of the front propulsion unit B ... And the excavation work for moving the main beam 14 forward is sequentially repeated.

In the excavation preparation operation for simultaneously pressing the grippers 18b, 18b, 18b, 18b of the two propulsion units B and B 'against the tunnel wall surface Sa, and the excavation sequential operation, the two propulsion units are operated. Excavation work for advancing the main beam 14 by the beam propulsion jacks 23 of B and B 'and preparation for excavation for simultaneously separating the grippers 18b, 18b, 18b and 18b of the two propulsion units B and B' from the tunnel wall Sa. In the state of the work and the excavation preparation work, the two propulsion units B and B '
May be sequentially repeated by each of the beam propulsion jacks 23... To move the two propulsion units B and B ′ to the front side of the main beam 14.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the tunnel excavation device of the present invention, and FIG. 2 is a cross-sectional view taken along the line II shown in FIG.

In the tunnel excavating apparatus according to the present invention, a main beam 14 is extended behind a mount 13 for rotatably supporting a cutter head 12, and two main propulsions having the same configuration are provided on the main beam 14. Units, that is, a front propulsion unit B and a rear propulsion unit B 'are arranged in series.

The main beam 14 is connected to the cutter head 12.
Of the front partial beam 1 corresponding to the front propulsion unit B.
5 and a rear partial beam 15 'corresponding to the rear propulsion unit B'.

Each of the front partial beam 15 and the rear partial beam 15 'is a tubular body having a rectangular cross section of a required length, and each of the upright walls 15a, 15a has an intermediate portion from a lower edge to a rear end thereof. The guide shoes 16, 16 are protrudingly provided.

The structure of the front propulsion unit B is as follows. Note that the rear propulsion unit B 'is
Therefore, the same reference numerals as those of the front-side propulsion unit B are used, and the description is omitted.

Reference numeral 17 denotes a wall pressing member, which comprises a wall pressing jack 18, 18 having grippers 18b, 18b fixed to the distal ends of drive rods 18a, 18a, and horizontally extending and contracting the grippers 18b, 18b toward the tunnel wall Sa. A pair of guides, each of which is disposed at the lower end of the inner surface thereof, has slide shoes 20, 20 slidably fitted on the guide shoes 16, 16 of the front partial beam 15 on the upper part of the machine frame 19 installed therein. Plates 21 and 21 are erected. Reference numerals 22 and 22 denote rolling correction jacks that are obliquely provided between the brackets 19a and 19a formed on both sides of the machine casing 19 and the guide plates 21 and 21, respectively.

Numerals 23 designate four beam propulsion jacks, which are a flat T-shaped mounting base 24 suspended from the lower surface of the front end of the front partial beam 15 and a bracket 26 projecting from the front of the machine frame 19. , Between the center leg plate 2 of the mounting stand 24
It is attached in a state of being distributed two by two on both sides sandwiching 4a.

As a result, the wall pressing member 17 moves to the rear or front of the main beam 14 along the guide shoes 16, 16 in accordance with the drive rods 23a of the beam propulsion jacks 23 extending or retracting. be able to.

27 is a front and rear propulsion unit B,
When the grippers 18b, 18b of B 'are not pressed against the tunnel wall Sa, the drive rod 27a is pressed against the bottom Sb of the tunnel wall shown in FIG. It is a rear supporter, and is vertically provided at the rear end of the rear partial beam 15 ′, that is, at the rear end of the main beam 14.

In the main beam 14, a transport start end 28 a is projected forward from the front end of the main beam 14 to face the cutter head 12, and a transport end 28 b is located behind the rear end of the main beam 14. A conveyor 28 projecting from the cutter head 1 is provided.
The waste excavated in 2 is carried out behind the main beam 14.

Next, a tunnel excavation method of the present invention using the tunnel excavation device of the present invention having the above-described configuration will be described with reference to FIGS.
This will be described with reference to FIG. 3 to 7 are explanatory views showing a digging operation in which the grippers 18a and 18b of the front-side propulsion unit B and the rear-side propulsion unit B 'are alternately pressed against the side of the tunnel wall Sa. Gripper 18b, 1 of propulsion unit B or rear propulsion unit B '
It is suitable for a case having sufficient strength to obtain a sufficient reaction force with only 8b, and excavation can be performed at a relatively high speed.

<Excavation work by the front or rear propulsion unit> When the excavation work by the front propulsion unit B is completed, in other words, before the excavation work by the rear propulsion unit B 'is performed, the gripper of the front propulsion unit B is required. 18b,
18b presses the side of the tunnel wall Sa, and the drive rods 23a of the beam propulsion jacks 23 are in an extended state.

The gripper 1 of the rear propulsion unit B '
8b, 18b are separated from the side of the tunnel wall Sa, and the drive rods 23a of the beam propulsion jacks 23 are in a retracted state (FIG. 3).

In order to perform the excavation by the rear propulsion unit B ', first, the drive rods 18a, 18a of the wall pressing jacks 18, 18 of the rear propulsion unit B' are extended and driven to move the grippers 18b, 18b. Excavation preparation work is performed to press against the tunnel wall Sa and to drive the drive rods 18a, 18a of the wall pressing jacks 18, 18 of the front side propulsion unit B to retract the grippers 18b, 18b from the tunnel wall Sa (FIG. 4). ). Thus, only the wall pressing member 17 of the rear propulsion unit B 'is fixed to the side of the tunnel wall Sa.

Subsequently, when the drive rods 23a of the beam propulsion jacks 23 of the rear propulsion unit B 'are extended and driven, the main beam 14 advances with respect to the wall pressing member 17 of the rear propulsion unit B'. Excavation by the cutter head 12, that is, excavation by the rear propulsion unit B 'is performed (FIG. 5). During this excavation work, the drive rods 2 of the propulsion jacks 23 of the front-side propulsion unit B are connected.
3a are degenerated.

When the excavation work by the rear propulsion unit B 'is completed, the grippers 18b of the rear propulsion unit B' press the tunnel wall Sa, and the driving rods 23a of the beam propulsion jacks 23 extend. ing. Also, the grippers 18b, 18 of the front propulsion unit B
b is separated from the tunnel wall Sa, and the drive rods 23a of the beam propulsion jacks 23 are in a retracted state (FIG. 6).

In order to carry out excavation by the front propulsion unit B, the drive rod 1 of the wall pressing jacks 18, 18 is required.
8a, 18a are driven to extend to grippers 18b, 18b.
Is pressed against the tunnel wall Sa, and the driving rod 1 of the wall pressing jacks 18, 18 of the rear propulsion unit B 'is
8a, 18a are retracted and the grippers 18b, 18b
Is separated from the tunnel wall Sa (FIG. 7). As a result, only the wall pressing portion 17 of the front propulsion unit B is fixed to the tunnel wall Sa.

Thereafter, when the driving rods 23a of the beam propulsion jacks 23 of the front propulsion unit B are extended and driven, the main beam 14 advances with respect to the wall pressing portion 17 of the front propulsion unit B, and the cutter head 12 , Ie, excavation work by the front propulsion unit B. During this excavation work, the drive rods 23a of the beam propulsion jacks 23 of the rear propulsion unit B 'are also provided.
Is degenerated. Thus, the excavation by the front propulsion unit B is completed, and the state shown in FIG. 3 is obtained.

FIGS. 8 to 12 are illustrations showing a digging operation in which the grippers 18b, 18b of the front-side propulsion unit B and the rear-side propulsion unit B 'are simultaneously pressed against the tunnel wall Sa. Propulsion unit B
Or, this is suitable when the grippers 18b and 18b of the rear propulsion unit B 'alone cannot obtain a sufficient reaction force.

<Excavation work by front and rear propulsion units> Before excavation, the grippers 18b, 18b, 18b, 1 of the front propulsion unit B and the rear propulsion unit B 'are used.
8b presses the tunnel wall Sa, and the drive rods 23a of the respective beam propulsion jacks 23.
Are in the extended state (FIG. 8).

To perform the excavation, first, the rear supporter 27
Of the front propulsion unit B and the rear propulsion unit B ', the drive rods 18a, 18a of the wall pressing jacks 18, 18 are respectively retracted. And gripper 18
b, 18b are respectively separated from the tunnel wall surface Sa (FIG. 9).

Further, the drive rods 23a of the beam propulsion jacks 23 of the front-side propulsion unit B and the rear-side propulsion unit B 'are driven to retract so that the wall pressing portions of the front-side propulsion unit B and the rear-side propulsion unit B' are pressed. 17,17
Is moved along the main beam 14 to the front side of the main beam 14 to perform necessary excavation preparation work (FIG. 10).

Subsequently, the drive rods 18a, 18a of the wall pressing jacks 18, 18 of the front-side propulsion unit B and the rear-side propulsion unit B 'are extended and driven, and the grippers 18b, 1 are driven.
8b, 18b, and 18b are pressed against the tunnel wall surface Sa, and thereafter, the drive rod 27a of the rear supporter 27 is driven to retract to separate from the tunnel bottom wall surface Sb (FIG. 11).
As a result, the wall pressing portions 17, 17 of the front propulsion unit B and the rear propulsion unit B 'are fixed to the tunnel wall Sa, respectively.

When the drive rods 23a of the beam propulsion jacks 23 of the front-side propulsion unit B and the rear-side propulsion unit B 'are extended, the respective wall pressing portions 17 of the front-side propulsion unit B and the rear-side unit B' are driven. , 17 are advanced by the main beam 14 and excavated by the cutter head 12, that is, excavation work is performed (FIG. 12), and upon completion thereof, the state shown in FIG. 8 is obtained.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention. In the above description, an example in which four beam propulsion jacks are provided in one propulsion unit has been described, but the number may be increased or decreased as necessary.

[0038]

According to the present invention, the following effects can be obtained. Since the two propulsion units have the same configuration, they can be commonly driven and controlled, and thus their control system can be simplified.

Since the two propulsion units are arranged in series along the main beam and outside of the main unit, the strength of the main beam can be sufficiently ensured. Even if a part of the beam propulsion jack breaks down, repair and maintenance work can be easily performed without disassembling them.

Since the beam propulsion jack is provided between the wall pressing part and the main beam, the main beam can be advanced in a stable state.

Since the main beam can be advanced while the grippers of the two propulsion units are simultaneously pressed against the tunnel wall surface, the strength of the tunnel wall surface is weak, and a sufficient reaction force can be obtained with only one of the two propulsion unit grippers. Excavation can be performed even if it is not possible.

Further, even when the main beam is advanced while the grippers of the two propulsion units are simultaneously pressed against the tunnel wall surface, since the propulsion units have the same configuration, their propulsion control is easy. is there.

[Brief description of the drawings]

FIG. 1 is a side view of a tunnel excavation device of the present invention.

FIG. 2 is a sectional view taken along the line II shown in FIG.

FIG. 3 is an explanatory diagram showing the tunnel excavation method of the present invention and showing a state before excavation by the rear propulsion unit.

FIG. 4 shows excavation preparation work by the rear propulsion unit;
It is explanatory drawing of the state in which the gripper of the front side propulsion unit and the rear side propulsion unit respectively expanded and contracted.

FIG. 5 is an explanatory diagram showing excavation work by a rear propulsion unit.

FIG. 6 is an explanatory diagram showing a state in which the excavation work by the rear propulsion unit is completed.

FIG. 7 shows excavation preparation work by the front propulsion unit;
It is explanatory drawing which shows the state which respectively extended and contracted the gripper of a front side propulsion unit and a rear side propulsion unit.

FIG. 8 is an explanatory diagram showing a state before excavation is performed by the front and rear propulsion units.

FIG. 9 is an explanatory view showing a digging preparation operation performed by the front and rear propulsion units, in a state where the grippers are separated from a tunnel wall surface.

FIG. 10 is an explanatory view showing a digging preparation operation by the front and rear propulsion units, and a state in which the wall pressing members are respectively moved to the front side.

FIG. 11 is an explanatory view showing a digging preparation operation by the front and rear propulsion units, and a state in which the grippers are pressed against the tunnel wall surface, respectively.

FIG. 12 is an explanatory diagram showing excavation work by the front and rear propulsion units.

FIG. 13 is a side view showing a conventional tunnel excavation device.

[Explanation of symbols]

 12 Cutter head 13 Mount 14 Main beam 15, 15 'Partial beam 17 Wall pressing part 18 Wall pressing jack 18b Gripper 23 Beam propulsion jack 27 Rear supporter 28 Carry-out conveyor B, B' Propulsion unit Sa Tunnel wall Sb Bottom of tunnel wall

Claims (7)

[Claims] 1. A tunnel excavating device comprising a main beam supporting a cutter head and a gripper for pressing a tunnel wall surface, comprising: a wall pressing jack for pressing the gripper against the tunnel wall surface, and along the main beam. The same structure comprising a slidably supported wall pressing portion and a beam propulsion jack which is provided between the wall pressing portion and the main beam to relatively move the wall pressing portion and the main beam 2 A tunnel excavating device comprising two propulsion units arranged in series along the main beam and outside the main beam. 2. The tunnel excavation device according to claim 1, wherein the main beam is formed by connecting partial beams, and a propulsion unit is arranged for each partial beam. 3. The tunnel according to claim 1, wherein the main beam is disposed so as to be offset above the center of rotation of the cutter head, and the beam propulsion jack of each propulsion unit is arranged near the center of rotation of the cutter head. Drilling equipment. 4. A rear supporter is provided at the rear end of the main beam to press against the bottom of the tunnel wall.
Or the tunnel digging device according to 3. 5. A tunnel excavation method for excavating a tunnel by advancing a main beam supporting a cutter head while pressing a gripper against a tunnel wall surface. Of the two propulsion units having the same configuration, the gripper of the front propulsion unit is separated from the tunnel wall surface,
And, in the excavation preparation work of pressing the gripper of the rear propulsion unit against the tunnel wall surface, and in the state of this excavation preparation work,
Excavation work to advance the main beam by the beam propulsion jack of the rear propulsion unit, and excavation preparation work to press the gripper of the front propulsion unit against the tunnel wall and separate the gripper of the rear propulsion unit from the tunnel wall And a step of sequentially excavating the main beam by the beam propulsion jack of the front propulsion unit in the state of the excavation preparation work. 6. A tunnel excavating method for excavating a tunnel by advancing a main beam supporting a cutter head while pressing a gripper against a wall surface of a tunnel. A digging preparation operation in which the grippers of two propulsion units having the same configuration are simultaneously pressed against the tunnel wall surface, and a digging operation in which the main beam is advanced by the beam propulsion jacks of the two propulsion units in the state of the digging and sequential operation. And a digging preparation work for simultaneously separating each gripper of the two propulsion units from the tunnel wall surface, and in this state of the digging preparation work, the two propulsion units of the two propulsion units are used to connect the two propulsion units to the main beam respectively. The excavation preparation work for moving to the front side is sequentially repeated. Drilling method. 7. The tunnel excavation method according to claim 6, wherein when the grippers of the two propulsion units are simultaneously separated from the tunnel wall surface, the main beam is supported by a rear supporter provided at a rear end of the main beam.