JPH0341640B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for excavating a tunnel using an invert segment, and in particular to a method for excavating a tunnel excavated in a circular manner by a shield machine. be.

[Conventional technology]

In the conventional shield construction method, as the shield machine advances, a subsequent truck equipped with a hydraulic power unit, oil tank, electric power panel, control panel, shear belt conveyor, etc. is moved immediately after the shield machine as it excavates. Operations such as propelling the shield machine, transporting shear, transporting and assembling segments are carried out continuously.

Further, behind it, a shear wheel, a segment transport cart, etc. are moved forward and backward, and work such as carrying out shears and carrying in segments is performed.

Further, at the rear thereof, in order to run the above-mentioned shear car or segment transport trolley, etc. to the rear and from the rear to the front, a main line rail is provided, and the above-mentioned trolley is run on the main line rail, Shears are transported to the outside, or materials such as segments are brought in from the outside.

However, the following truck, pulley truck, segment transport truck, etc. must run on the rails by laying rails on the bottom of the segments that are assembled one after another in the tunnel. In order to lay the rails on the bottom surface, extremely tedious work must be carried out, such as first passing a rail support beam over the arc-shaped bottom surface of the segment, then laying the walkway board and attaching the rail to this. No.

Therefore, when excavating a tunnel using a shield machine, an invert segment is placed at the center of the bottom of the tunnel hole, and the segments are assembled around this, and the invert segment is formed integrally with the sleeper at the center of the top surface. In addition, in order to assist the assembly in the front and back direction, protrusions and recesses are mutually provided in the front and rear directions, and these protrusions and recesses are fitted to form the tunnel shaft. A technique that simplifies directional assembly and rail installation is disclosed in Japanese Utility Model Application Publication No. 51-102235.

Further, a mobile roadbed device in which a platform frame on which rails are laid can be moved in the axial direction of the tunnel is also described in Japanese Patent Publication No. 17126/1983.

[Problem to be solved by the invention]

When using the above conventional type to excavate a circular tunnel using a shield machine, it is equipped with a hydraulic power unit, an oil tank, an electric power panel, a control panel, or a shear conveyor belt to operate the shield machine. While the following truck was moved,
It is not possible to operate the shield machine continuously, transport the excavated shear to the rear, and carry out transport work for supplying materials such as segments from the rear at the same time.

Therefore, it is necessary to solve this problem in order to improve the efficiency of tunnel excavation work using the shield machine by continuously operating the shield machine to transport the debris to the rear and simultaneously supplying segments etc. from the rear. A technical problem arises, and the present invention aims to solve this problem.

[Means to solve the problem]

This invention was proposed to achieve the above object, and when tunnels are sequentially excavated by a shield machine, an invert segment is laid at the lower center near the tail of the shield machine, and the invert segment is The segments are sequentially laid and assembled as the shield machine excavates, and the segments are assembled around the invert segment, and a main rail is attached to the center upper surface of the invert segment, and a main rail is attached to the lower part of the tunnel. In a tunnel excavation method using a shield machine in which a platform frame that is movable in the direction of the tunnel axis is disposed and rails are laid on the platform frame so that a cart or the like can be moved back and forth, the above-mentioned invert The left and right sides of the main rail of the segment are projected upward to form a raceway surface on the upper surface, and a hydraulic power unit, an oil tank, an electric power panel, a control panel, and a shear belt conveyor are installed across both raceway surfaces. etc., and the following bogie is constructed in a gate shape by standing above both track surfaces, and rollers for preventing falling are attached to both left and right ends of the upper part of the bogie. A roller is caused to roll along the inner surface of the segment, and further behind the platform frame, the platform frame is slidably straddled over the left and right track surfaces of the invert segment, and rails are installed parallel to the left and right sides of the platform frame. An invert segment characterized in that a shear wheel, segment, transport cart, etc. are moved forward or backward on each rail to enable excavation by the shield machine and transportation of shears, segments, etc. This paper aims to provide a tunnel excavation method using.

[Effect]

Both outer surfaces of the main rail provided at the center of the invert segment are projected upward, and the upper surface is used as the raceway surface, even though this raceway surface is a circular tunnel excavated by a shield machine. , the width becomes wider, and therefore, when a platform frame with a trailing bogie and rails laid on the track surface separately from the main line rail and rails on both left and right sides is installed in a movable manner, the platform frame Large-capacity shear cars and the like can be used to operate on the built-in rails, improving work efficiency.
Furthermore, the hydraulic power unit, oil tank, electric power panel and control panel necessary for the operation of the shield machine,
A shear conveyor belt conveyor, etc. is installed on the following truck to enable excavation propulsion by the shield machine, and the truck is run on rails attached to the platform frame to carry in segments and other materials for segment assembly. This makes it possible. Moreover, the following truck is formed in a gate shape,
In addition, since rollers are attached to both upper ends of the segment and roll along the inner surface of the segment, the following truck will not fall over and its transition operation will be smooth.

In this way, the shear removal and transportation of segments and other materials are carried out at the same time as the tunnel excavation work by the shield machine, so that the segment assembly work can be carried out at the same time as the shield machine is operated. Tunnel excavation work by machines is carried out extremely efficiently.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings. For convenience of explanation, conventionally known configurations will also be explained at the same time.

Reference numeral 1 indicates the segments assembled in the excavated tunnel hole, 2 the following bogie, 3 the platform frame, 3' the platform frame at the rear of the group of 3 platform frames, and 4 the main rail.

The details of each part will be explained next.

At the lower center of the inner ring body of the segment 1 assembled into an annular shape, an inverted segment 5 is used as shown in FIGS. 4 to 6. A guide groove 17 is provided at the center of the invert segment 5, and rail mounting surfaces 6, 6 for the main rail are formed on both sides of the guide groove 17.
Raceway surfaces 7, 7 are formed on the outside of 6 to be slightly higher than this.

The segments 1 are sequentially assembled into a ring on the left and right sides of the invert segment 5.

In Fig. 3, the following bogie 2 is equipped with a hydraulic power unit a, an oil tank b, an electric power panel, a control panel c, a shear conveyor belt 15, and the like. This is the most important equipment for tasks such as shear conveyance, segment assembly, etc.

This following bogie 2 moves on the left and right track surfaces 7, 7 of the inverted segment 5, but there is a fourth
As shown in the figure, a pedestal 8 may be provided to slide on the raceway surfaces 7, 7, but wheels may be provided in place of the pedestals 8, 8.

In the figure, reference numerals 9, 9 are rollers provided on the upper left and right sides of the trailing truck 2, and these rollers 9, 9 prevent the trailing truck 2 from overturning and always slide stably on the track surfaces 7, 7. This enables the work to be carried out smoothly and safely.

A large number of platform frames 3 are arranged in parallel at the rear of the following bogie 2. Rails 10, 10 are laid on the platform frame 3 on the left and right sides of the tunnel axis, and a shear wheel is mounted on the platform frames 3. Toro is operated to transport materials such as segments.

Reference numeral 11 denotes a column erected at the center of the platform frame 3, 12 a beam member provided on the upper part of the column 11, and rollers 13, 13 provided at both ends thereof roll on the inner surface of the assembled segment 1.

On the underside of the platform frame 3 are pedestals 14, 14.
are provided, and the pedestals 14, 14 slide on the raceway surfaces 7, 7 of the invert segment 5.

On the girder 12 above the platform frame 3 is a conveyor belt 1 for conveying the shear excavated by the excavator and feeding it into the shear wheel moving downward.
Install 6. The conveyor belt 16 is connected to the conveyor belt 15 of the following truck 2.

3' is a platform frame parallel to the rear of the 3rd group of platform frames, and this platform frame 3'
The above-mentioned pillars 11, girders 12, etc. are not provided in the tunnel, and rails 10', rails 10',
Install 10'. Pedestals 14', 14' are also attached to the lower surface of the platform frame 3' and slide on the raceway surfaces 7, 7 of the invert segment 5.

The main rail 4 is attached to rail mounting surfaces 6, 6 at the center of the invert segment 5, and the main rail 4 is connected to left and right rails 10', 10' attached to the platform frames 3', respectively.

In the present invention, during excavation work, the trailing bogie 2, which is most active in the work at the tail section, moves on the track surfaces 7, 7 on the invert segment 5, so that the same car is not required. There is no need to provide special rails for transition.

This means that there is no need to provide a bridge or walkway board for rail attachment to the assembled segment, and there is no need to move the trailing bogie rail 2 forward as the tunnel is excavated. Such complicated steps are completely unnecessary. In addition, a shear wheel for shear conveyance provided following the succeeding truck 2 and a transport truck for carrying in the segment 1 and other materials are attached to each platform frame sliding on the track surfaces 7, 7 of the invert segment 5. Rails 10, 10 on 3, 3',
By attaching 10' and 10' and allowing the vehicle to run on top of them, there is no need for arrow struts or walkway boards, etc., and this can be easily installed.
In addition, it does not take any effort to remove and move.
Since it is only necessary to sequentially slide the platform frames 3, 3' forward as the excavation progresses, the work is simplified and can be carried out efficiently.

Since the rails 10, 10, 10', 10' installed on the platform frames 3, 3' can be raised accordingly, the underground area can be used more widely. A large-capacity shear wheel or the like can be used, which improves work efficiency and is advantageous in terms of safety. In addition, the vehicle formation is shortened accordingly, and the temporary excavation distance of the platform frames 3, 3' is shortened. In addition, since the track is more stable than the conventional method of laying rails on the crossing material, the running speed of the vehicle can be increased.

Furthermore, since the main rail 4 can be directly attached to the rail attachment surfaces 6, 6 of the invert segment 5 using attachment fittings, this can be done in a short time and the work is simple.

Even if excavated soil falls into the mine during excavation and unloading work, it will be collected in the flow guide groove 17 of the invert segment 5, and it can be easily removed and cleaned, thereby reducing the time required for constantly cleaning the mine. be able to.

[Effect of the invention] Both outer sides of the main line rail provided in the invert segment were made to protrude upward, and the upper surface was used as the raceway surface, so even though it was a circular tunnel,
The tunnel bottom can be used widely, improving work efficiency. Furthermore, since the trailing bogie is run on the track surface of the invert segment, there is no need for a special rail for running the trailing bogie, which is most useful in tunnel excavation work using a shield machine, and Since the following trolley is gate-shaped, it does not interfere with various operations at the lower part, and furthermore, rollers are provided at both ends of the upper part so that it can roll along the inner surface of the segment. Therefore, the following truck does not fall over, and the safety of excavation work by the shield machine is ensured. Furthermore, since the platform frame is disposed at the rear of the following bogie so as to be able to slide freely on the track surface, the platform frame can slide smoothly, and as mentioned above, the platform frame is connected to the circular tunnel. Since it can be formed wide even at the bottom of the container, it is possible to provide rails on both the left and right sides for running trolleys such as sliding or segment transportation, and the trolleys also have a large capacity. Because it is possible to operate
The operating efficiency of the shield machine increases.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional plan view of a tunnel during tunnel excavation construction. Figure A is the left half of the tunnel, B is the right half of the tunnel, Figure 2 is a vertical side view of the tunnel, and A is the left half of the tunnel. FIG. 3 is an enlarged longitudinal cross-sectional side view of the tail portion, and FIG. 4 is a cross-sectional view taken along the line A--A of one embodiment. FIG. 5 is a cross-sectional view taken along the line B--B in FIG. 2, and FIG. 6 is a cross-sectional view taken along the line C--C in FIG. 1...Segment, 2...Following truck, 3, 3'
...Platform frame, 4... Main line rail, 5...
...Invert segment, 6...Rail mounting surface,
7...Race surface, 10,10'...Rail.

Claims (1)

[Claims] 1. When sequentially excavating a tunnel with a shield machine, an invert segment is laid at the lower center near the tail of the shield machine, and the invert segment is sequentially laid and assembled as the shield machine excavates, Segments are assembled around the invert segment, a main rail is attached to the upper center surface of the invert segment, and a platform frame movable in the tunnel axis direction is provided at the bottom of the tunnel. In a tunnel excavation method using a shield machine in which rails are laid on the platform frame and a bogie etc. can be moved back and forth, the left and right sides of the main rail of the invert segment are made to protrude upward. The upper surface is formed as a raceway surface, and a subsequent bogie equipped with a hydraulic power unit, an oil tank, an electric power panel, a control panel, a shear belt conveyor, etc. is moved across both track surfaces, and the following bogie is It is constructed in a gate shape by standing above both raceway surfaces, and rollers for preventing falling are attached to both left and right ends of the upper part, and the rollers are caused to roll along the inner surface of the segment. On the other hand, the platform frame is slidably straddled over the left and right track surfaces of the invert segment, rails are laid parallel to the left and right sides of the platform frame, and a shear wheel, segment, transport cart, etc. are installed on each rail. 1. A method for tunnel excavation using an invert segment, characterized in that the shield machine can be moved forward or backward to enable excavation by the shield machine and transport of shears, segments, etc.