JP7178908B2 - Temporary scaffolding in a tunnel - Google Patents

Description

The present invention relates to temporary work scaffolding in tunnels used in construction work.

Among the tunnel constructions in the shield tunneling method, especially road tunnels, for the purpose of evacuation and inspection in an emergency, cut open a part of the parallel tunnels for up and down lines, and connect them with horizontal tunnels such as U-turn roads and connecting roads. be constructed. Since these are generally carried out without excavation in the ground, supplementary construction methods such as chemical injection methods and pipe roofs are used together to ensure water stoppage and support between tunnels. In this case, scaffolding is required to temporarily place equipment such as propulsion equipment and chemical injection equipment required for construction of the auxiliary construction method. If temporary scaffolding is installed in advance to temporarily place various equipment for auxiliary construction method construction in the tunnel, a large temporary trolley that can travel in the tunnel (e.g., reinforcing bar trolley, formwork trolley, floor slab installation trolley etc.) can be an obstacle to the installation work of side walls and floor slabs.
Therefore, conventionally, temporary scaffolding has been installed and construction has been carried out after all such trolleys have passed.
Patent Documents 1 and 2 disclose mobile scaffolds in tunnel construction, but these are all in the form of running on rails installed on inverts or sleepers constructed at the bottom of the tunnel, and the above-mentioned temporary trolley. cannot avoid interference with

Japanese Patent Application Laid-Open No. 2001-48012 JP 2008-38364 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a temporary scaffolding in a tunnel that can ensure the construction of an auxiliary construction method.

The tunnel temporary scaffolding of the present invention for solving the above-mentioned problems comprises a plurality of brackets arranged on both sides in the cross-sectional direction of the inner surface of the tunnel made up of a plurality of segment pieces and spaced apart in the axial direction of the tunnel. and a joist material fixed to the plurality of brackets arranged in the axial direction of the tunnel so as to bridge the upper surfaces of the brackets of each row of the bracket group, and the joists facing the A beam arranged in the cross-sectional direction of the tunnel so as to span the upper surface of the joist material and fixed to the joist material, a suspension member that supports an intermediate portion of the beam attached to the upper part of the tunnel, and the beam scaffolding material laid on top of the bracket, wherein the bracket is fixed to the inner surface of the lining via a bolt to an insert embedded in the segment piece, and the beam is the An upper beam step member and a lower beam step member are arranged so as to overlap each other with a vertical gap in substantially the center of the tunnel, and a height adjustment member is interposed in the gap and connects the upper beam step member and the lower beam step member. and

By providing the in-tunnel temporary scaffolding of the present invention in the upper part of the tunnel, it is possible to secure the construction of the auxiliary construction method with a simple structure and at a relatively low cost.

1 is a cross-sectional view of a tunnel showing a temporary scaffolding in a tunnel according to the present invention on which equipment for injecting chemical solutions is placed; FIG. 1 is a cross-sectional view of a tunnel showing a temporary scaffolding in a tunnel of the present invention on which pipe roof installation equipment is placed; FIG.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows the temporary scaffolding in the tunnel of the present invention on which chemical injection equipment is placed.
The in-tunnel temporary scaffolding 3 in this embodiment is constructed across the width direction of the inner surface of the lining 1 consisting of a plurality of segment pieces forming the outer shell of the circular tunnel T built in the ground G. It is composed of a beam 33 and scaffolding 35 spread over the upper surface of the beam 33, and both ends of the beam 33 are supported by brackets 31, 31 fixed to the inner surface of the lining 1. The central part is fixed to a suspending member 34 suspended from the inner surface of the lining 1. - 特許庁

The bracket 31 is formed by combining a plurality of L-shaped steel materials (angle materials) and integrally processing them by welding. It is formed in a truss shape by a horizontal member fixed at one end so as to protrude on the inner surface side of the work 1 and a cane member fixed at the other end of the horizontal member and below the support member. It has the same shape as the bracket used when placing the wale of the shoring. The bracket 31 is screwed and fixed to the lining 1 via bolts in inserts embedded in segment pieces forming the lining 1 .
The brackets 31, 31, . are placed and fixed in the direction of the tunnel axis.

Next, the beam member 33 made of H-shaped steel is arranged in the orthogonal direction (cross-sectional direction of the tunnel T) so as to span the upper surfaces of the left and right side joist members 32, 32. fixed in between. The beam member 33 in this embodiment is arranged substantially in the center of the tunnel T so that two upper beam step members 331 and two lower beam step members 332 overlap vertically. The upper beam step member 331 and the lower beam step member 332 are integrally fixed via a height adjusting member 333 made of H-shaped steel.

Next, the hanging members 34 made of H-shaped steel materials are provided with an isolated member 341 , an upper joist member 342 , a column member 344 and a lower joist member 343 . The single member 341 is fixed by bolts to inserts embedded in segments (not shown) so as to be in close contact with the inner surface of the lining 1 in the cross-sectional direction of the tunnel T at substantially the center of the upper portion of the lining 1 . A plurality of pieces 341, 341 . . . are installed at predetermined intervals in the axial direction of the tunnel T. It is fixed so that it is in close contact with the A lower joist member 343 is fixed to the upper surface of the beam upper step member 331 so as to overlap the upper joist member 342 in plan view of the tunnel T. As shown in FIG. The vertically arranged column members 344 are fixed to the lower surface of the upper joist member 342 and the upper surface of the lower joist member 343 .

Further, the scaffolding boards 35 are spread over the upper surface of the beams 33 to form a scaffolding.
As the scaffolding board 35, a steel scaffolding board that is generally distributed as an off-the-shelf product is mainly used.

This in-tunnel temporary scaffolding structure 3, for example, as shown in the figure, is designed for the traffic of large trucks such as side wall form trucks F that run in the axial direction of the tunnel T on the track equipment 2 formed on the invert portion of the lining 1. work on the temporary scaffolding 3 in the tunnel and work on the bottom of the tunnel scaffolding structure 3 are separated safely and reliably becomes possible. As a result, it becomes possible to carry out a plurality of operations in parallel within the tunnel T, thereby shortening the entire construction process.
On the temporary scaffolding 3 in the tunnel in the same figure, the lining 1 is installed while the construction equipment M necessary for injecting the chemical solution for water stoppage is arranged for the connection work with another tunnel that is placed side by side with an interval. A plurality of chemical solution injection pipes R, R, .

FIG. 2 shows the temporary scaffolding in the tunnel of the present invention on which the pipe roof installation equipment is placed. In the same way as the chemical solution injection in FIG. A plurality of pipe roofs P, P . . .
The form of the temporary scaffolding 3 in the tunnel can be changed to the extent that it does not become an obstacle to the large trucks such as the side wall formwork truck F that passes under it. It becomes possible to secure the inner space necessary for

As described above, the in-tunnel temporary scaffolding according to the present embodiment has a simple structure, is inexpensive, and enables the construction of the upper part of the scaffolding by the auxiliary construction method without stopping the construction performed under the scaffolding.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the present invention.
For example, the segments may be steel segments rather than concrete-based. In this case, welding and bolting to temporary members such as vertical ribs are replaced by inserts. Moreover, although the beam material divided|segmented into the upper and lower stages was applied, a single piece may be sufficient. Furthermore, the shape of the tunnel may be rectangular or horseshoe-shaped instead of circular.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the present invention.

G Ground T Tunnel F Side wall formwork truck R Chemical injection pipe P Pipe roof M Construction equipment, etc. 1 Lining 2 Rail equipment 3 Tunnel temporary scaffolding 31 Bracket 32 Side joist material 33 Beam material 331 Beam upper step material 332 Beam lower step material 333 Height adjustment member 34 Suspension member 341 Single member 342 Upper joist member 343 Lower joist member 344 Column member 35 Scaffold board

Claims (1)

two rows of bracket groups each comprising a plurality of brackets arranged at intervals in the axial direction of the tunnel on both sides in the cross-sectional direction of the inner surface of the tunnel composed of a plurality of segment pieces;
a joist member arranged in the axial direction of the tunnel so as to span the upper surfaces of the brackets of the bracket group in each row and fixed to the brackets;
a beam arranged in the cross-sectional direction of the tunnel so as to span the upper surfaces of the facing joist members and fixed to the joist members ;
a hanging member for supporting an intermediate portion of the beam attached to the upper part of the tunnel;
A scaffolding in a tunnel comprising scaffolding materials laid on the beams,
The bracket is fixed to the inner surface of the lining via a bolt to an insert embedded in the segment piece,
The beam is an upper beam step member and a lower beam step member which are arranged so as to overlap each other with a vertical gap in the approximate center of the tunnel, and are interposed in the gap to connect the upper beam step member and the lower beam step member. A scaffolding in a tunnel characterized by comprising a height adjusting member .

Images