JPS6013199A - Tunnel drilling method using invert segment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides the following features when excavating a tunnel with an excavator:
By using an invert segment at the bottom of the center of the tunnel hole and assembling the segments around this, it is possible to carry out the removal of the pickpocket, carry in the segment, and assemble it in an extremely easy and orderly manner, and it is of course necessary to simultaneously inject backfill material. This invention relates to a tunnel excavation method using invert segments that can extremely easily perform secondary winding according to the conditions.

In the conventional shield construction method or IBM construction method, as the excavator is propelled, a following truck equipped with a hydraulic power unit, oil tank, electric power panel, control panel, slide conveyor belt, etc. is immediately excavated. Work such as propelling the excavator, transporting the pickpockets, and transporting and assembling the segments is carried out continuously.

Behind the pickpocket, the pickpocket wheel, segment; In order to move the segment transport cart from the rear to the front, a main rail is provided and the truck is run on it to transport pickpockets to the outside or to bring in segments from the outside.

However, the following truck, scraping wheel, and segment transport stop must be made to run on a rail laid on the bottom of the segments that are assembled in sequence in the tunnel; To lay a rail on the bottom surface, it is first necessary to pass a bridge + fl, that is, a rail support beam, to the arcuate bottom surface of the segment, and then go through the troublesome task of laying a walkway board and attaching the rail to this.

In addition, especially in this tail section where tunnel excavation progresses sequentially, in order to allow the following bogies to continuously operate in this section, the rail support beams and rails must be constantly laid forward, and the following bogie rails must be relocated. It is extremely difficult to perform this operation in the narrow tail section where footing is extremely poor, and it is extremely difficult to perform shear extension and segment assembly. This had a significant impact on the efficiency of progress.

The present invention aims to solve such problems, and in order to do so, when excavating a tunnel with an excavator, an invert segment is first laid in the lower center part of the tail part, and the segment is moved around this invert segment. Then, a wooden wire rail 1 is attached to the top center of the invert segment, and the following bogie is moved across the track surfaces formed on the left and right top surfaces, and at the very rear, the platform frame is attached to the track surface. It is made to be slidable, a rail is attached to it, the pulley wheel and segment transport trolley are moved, and this rail and the main line rail are connected behind it, so that the pulley wheel and segment transport trolley can run on the main line rail. In this way, the construction work is simplified and the construction efficiency is improved, making it possible to shorten the construction period and reduce construction costs.

This will be explained with reference to the drawings.

In Figures 1 and 2, (1) is the nine segments that are assembled in the excavated tunnel hole in sequence, (2) is the trailing bogie, (5) is the platform frame, and (3') is the platform frame (3). Platform frame at the rear of the group, (4) shows the main rail.

The details of each part will be explained next.

Segments assembled into an annular shape) In the lower center of the inner annular body of (1), as shown in FIGS. 4 to 6, an invert segment (5) is used. The center of the invert segment (5) is provided with a flow guide groove (1'7), and rail mounting surfaces (6) (6) for the main rail are formed on both sides of the flow guide groove (17). 'fU(6)(
On the outside of 6), a raceway surface (y) (7) is formed slightly higher than this.

The segments (1) are assembled into a ring in order on the left and right sides of the inverted segment (5) f as the center.

In Fig. 5, the following truck (2) includes a hydraulic power unit (a), an oil tank (b), an electric power panel, and a control panel (C).
, and is equipped with a pickpocket conveyor belt (15), etc. When excavating a tunnel, the tail part is used to carry out tunnel excavation, pickpocket conveyance,
This is the most important equipment for tasks such as segment assembly.

This successor! (2) i-t invert segment (5)
It moves on the left and right raceway planes (y) (Pl), but as shown in Figure 4, a stand foot (8) is provided to move it on the raceway plane (7).
(7) may be made to slide, but this pedestal (8)
Wheels may be provided in place of (8).

In the same figure, (9) and (9) are rollers provided on the upper left and right sides of the following bogie (2), and these rollers (9) (9) prevent the following bogie (2) from overturning and keep the track stable at all times. Surface (1 (
7) The top can be slid on to allow work to be carried out smoothly and safely.

A large number of platform frames (3) are installed in parallel behind the following platform * (2), and rails (1o) (lo) are laid on the platform frames (3) on the left and right sides of the tunnel axis, respectively. , and a toro that transports materials such as a pick-up wheel and segments will run on top of it.

(ll) is a pillar installed in the center of the platform frame (3), and (12) is a girder installed at the top of the pillar (11), and rollers (13) (11'dMJ vertical The segment (1) rolls on the inner surface.

On the underside of the platform (3) are the feet (I4").
(1, 4) are provided, and the platform feet (14) and (14) slide on the raceway surfaces (7) (7) of the invert segment (5).

A conveyor bell (16) is installed on the girder (12) above the platform (3) to convey the pickpocket excavated by the excavator and throw it into the pickpocket wheel that has moved downward. m sending her,) (xs) is the following truck (2)
It is connected to the conveyor belt (15).

(3') is a platform frame parallel to the rear of the platform frame (3) group.
1) includes the pillars (11) 4' (i material (12
), etc., and install the rails (10') and (101) in two rows on the left and right in the axial direction by screwing them. Attach the pedestal (14'') D4') to the lower surface of the platform frame (3+) by sliding it on the track surface (7) (7) of the invert segment (5).

The main rail (4) has several marks on the rail mounting surface (6) (6) of the invert segment (5'), and this wooden rail (4) is attached to the platform frame (31) group mentioned above. It connects with the left and right Rageshiku 1O1) (10I) respectively.

In the present invention, in the excavation construction vehicle, the trailing cart (2) which is also active in the construction at the tail part is an inverter.
moving on the orbital surface (tsu) (l) on the segment (5),
There is no special need for a rail for transferring the same car.

This means that there is no need to provide a bridge or a walkway board for rail attachment to the assembled segment, and there is no need for complicated steps such as digging a tunnel. It is.

-4) ζThe invert segment (5'
) rails (10) (lO), (1
By attaching the 0') (lo') and running on the soil, there is no need for arrow struts or walkway boards, and this can be easily done several times, and the trouble of removing and moving them is also saved. It doesn't take much time at all, and all you have to do is slide the platform frames (3) (3') forward 1111'' as you excavate, so the work is simplified and can be done efficiently. .

And the rails (lO) (lO), (10') (101) installed on the platform frame (s') (3') are
Since the level can be raised that much, the underground area can be used more widely, which means that a large-capacity pulley can be used, which makes work easier and is advantageous in terms of safety. Yes, and the vehicle formation is that much shorter, and the same platform frame (3) (z'
)'s temporary propulsion distance becomes shorter. This also stabilizes the track compared to laying a ledge on top of the crossing material as in trenches, allowing vehicles to travel faster.

Furthermore, since the thick wire rail (4) can be directly attached to the rail attachment surface (a) (a) (a) K of the invert segment (5) using the attachment fittings, this can be done in a short time and the work becomes simple.

Even if excavated soil falls into the mine during the excavation work, it will be removed from the flow guide groove (17) of the invert segment (5).
Is it easy to eliminate and clean the collected underground underground? i\' cleaning time can be the entire time.

According to the present invention, as described above, various operations on the tail portion can be performed extremely easily and in an orderly manner, so that the injection of handling material after segment assembly can be easily carried out at the same time during the machining of segment assembly. The trench makes it easy to perform various preparations for secondary winding and winding if necessary.

Conventionally, in order to perform secondary winding, the following truck,
Although it is necessary for the miners to carry out the ferry and walkway boards, according to the method of the present invention, in this case, only the main rails need to be removed, and the formwork can be of a horseshoe-shaped cross section due to the use of inverted segments. This is easy to move by using the track surface of the same segment, and it is also easy to set and disassemble the formwork, and the amount of concrete poured can be reduced without waste.

The method of the present invention improves the S degree of excavation, makes work safer, improves work efficiency, shortens the construction period, and reduces construction costs. The construction period can also be shortened.

[Brief explanation of drawings]

Figure 1 is a cross-sectional plan view of the tunnel during tunnel excavation construction. Figure (a) is the left half of the tunnel, and figure (b) is the right half of the tunnel. Figure 2 is a vertical side view of the same, Figure (A) is the left half, Figure (B) is the right half, and Figure 3 is an enlarged vertical side view of the tail. This is an example diagram showing two pure sections. Figure 5 is back 2 Figures B-B
@Cross-sectional view and Figure 6 are the same (cross-sectional view taken along the 0-0 line.
．． 31...(-Platform frame 4...! Main line rail 5...φ Invert segment 6...Rail mounting surface 7...Race surface 1o1・10'...e
·rail

Claims (1)

[Claims] 1. When excavating a tunnel one by one with an excavator, an invert segment is first laid at the lower center of the cutting part, and as the excavator advances, the invert segment is sequentially laid and assembled. Assemble the segments around the invert segment, attach the main line rail to the upper center of the inverted segment, and install the hydraulic power unit, oil tank, electric power panel, control panel, and slide conveyor belt across the track surfaces formed on the left and right upper surfaces of the inverted segment. A platform frame is slidably provided on the track surface behind it, and rails are laid in parallel on both the left and right sides of the platform frame.
A slide wheel and a segment transport trolley are made to move forward or backward on each rail, and behind the slide wheel and segment transport trolley are connected to the main rail. A tunnel excavation method using inverted segments that allows running on main line rails.