JP2002070498A - Method and device for placing concrete for tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for the rearrangement piping work of a concrete transport pipe, easily rearrange concrete transport, drastically reduce a construction period, and to place concrete uniformly with improved quality. SOLUTION: In the method and device for placing concrete 14 for secondary lining by using a traveling form 16 in a tunnel 12, a concrete transport pipe 20 to be used out of a plurality of concrete transport pipes 20 arranged at the traveling form 16 is connected to a concrete supply pipe 22 arranged at the traveling form 16, and then the concrete 14 is placed between the traveling form 16 and a wall surface 48 in the tunnel successively or simultaneously from a concrete carry-out pipe 24 being provided at several locations of the concrete transport pipe 20 to be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for placing concrete for secondary lining in a tunnel. In addition, in this specification, "casting" refers to filling mud-like concrete that has not been cured and hardened between the formwork and the inner wall surface of the tunnel.

[0002]

2. Description of the Related Art Originally, for concrete placement for secondary lining in a tunnel, a movable formwork for placing concrete is folded forward and transported after completion of concrete placement. It was developed using a movable formwork that was deployed, installed again, and cast concrete at that location.

In addition, concrete is placed between the movable formwork and the inner wall surface of the tunnel by a lower part on the lap side (opposite to the tunnel excavation side), a lower part on the wife side (tunnel excavation side), and an upper part on the lap side. , And is usually placed sequentially on the upper part of the wife's side.

[0004] For this purpose, concrete is cast first by opening an inspection window at a predetermined position of a movable formwork to serve as a concrete carry-out port, and projecting a tip of a concrete transport pipe connected to a concrete supply pipe from the inspection window. Then, concrete is filled between the movable formwork and the inner wall surface of the tunnel from the tip of the concrete transport pipe.

Next, a worker visually checks the amount of concrete filling from an inspection window below the concrete filling position, and after a specified amount of concrete is filled, closes the inspection window.
Move to another inspection window, open the inspection window, visually check the concrete filling amount, and close the inspection window.

[0006] Next, after the concrete placement at a predetermined location is completed, the concrete transport pipe is stored from the inspection window at the location where the casting has been completed, and the inspection window at another position is transported to the concrete. It is used as an outlet, and concrete is cast again by the same operation as described above.

[0007] The concrete transport switching has been performed by dividing the concrete transport pipe into a large number and reassembling the concrete transport pipes to separate locations.

Further, as shown in FIGS. 10 to 12, concrete is cast from only four places, that is, two upper and lower places in the longitudinal direction of the movable formwork.

For this reason, each part (four places) of the movable formwork
When placing concrete, the concrete placed between the movable formwork and the inner wall of the tunnel is usually compressed by compaction of the poured concrete and vibration of the vibrator used to remove air bubbles mixed in the concrete. To fill.

In FIGS. 10 to 12, reference numeral 50 denotes a movable formwork, 52 denotes a concrete supply pipe, 54 denotes a concrete transport pipe, 56 denotes an inspection window, 58 denotes a vibrator, 60 denotes concrete, and 62 denotes an inner wall surface of the tunnel. Show.

[0011]

Conventionally, in placing concrete between a movable formwork and an inner wall surface of a tunnel, a total of a lower part on a lap side, a lower part on a wife side, an upper part on a lap side, and an upper part on a wife side. The work of rearranging the concrete transport pipes in order to four places was required, which was not only very complicated but also caused a delay in the construction period.

Further, since concrete is cast from only four locations of the movable formwork, the concrete to be filled between the movable formwork and the inner wall surface of the tunnel becomes uneven, and the quality of the cast concrete is remarkable. It was a problem that it decreased.

In view of the above drawbacks, the present invention eliminates the need for any work to replace concrete transfer pipes, facilitates concrete transfer switching, greatly shortens the construction period, and makes concrete concrete uniform and high-priced. It is an object of the present invention to provide a method and an apparatus for placing concrete for a tunnel, which can be cast with high quality.

[0014]

SUMMARY OF THE INVENTION The present invention relates to a method and an apparatus for placing concrete for secondary lining using a movable form in a tunnel. After connecting the concrete transfer pipe to be used among the concrete transfer pipes to be used and the concrete supply pipe disposed in the movable formwork, the concrete transfer pipe to be used was provided at several places in the length direction of the concrete transfer pipe to be used. From each concrete discharge pipe, concrete supplied from a concrete supply pipe is sequentially or simultaneously poured between a movable formwork and a tunnel inner wall surface, or a connection portion of each concrete transport pipe, And at the connecting portion between the concrete transfer pipe and the concrete discharge pipe, the concrete transfer pipe has a triple structure, and the middle transfer pipe is rotatable with respect to the inner and outer transfer pipes, The concrete can be transported by matching the through holes drilled in the transport pipe, and the concrete transport is closed by closing each through hole of the inner and outer transport pipes at locations other than the through holes by the middle transport pipe. It is characterized in that it is closed and controls the transfer of concrete to each concrete transfer pipe and each concrete discharge pipe.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete casting device for a tunnel according to the present invention is mounted on a movable formwork 16 for placing concrete 14 for secondary lining in a tunnel 12. As shown in FIGS. 1 to 9, it has the following configuration.

A plurality of concrete transfer pipes 20 and concrete supply pipes 22 are provided on the gantry 18 of the movable formwork 16, respectively.

In this embodiment, the concrete transport pipe 20
The concrete supply pipe 22 is provided on the lap side (tunnel) of the movable formwork 16, one at the upper stage of the movable formwork 16, and one each at the middle stage and the lower stage on both sides of the movable formwork 16. One on the side opposite to the excavation side).

Concrete discharge pipes 24 are provided at several points in the length direction of each concrete transfer pipe 20.

In this embodiment, the concrete discharge pipe 24
Are provided in each of the concrete transport pipes 20.

At the connecting portion between each concrete transfer pipe 20 and the concrete discharge pipe 24, the concrete transfer pipe 20 has a triple structure, and the middle transfer pipe 26 is connected to the inner and outer transfer pipes 2.
7 and 28, and each pipe 26, 27, 28
Holes 30 for transporting concrete 14 respectively
And by allowing each of the through holes 30 to coincide with each other with the central transport pipe 26, the concrete 14 can be transported.
Further, by closing each of the through holes 30 of the inner and outer transfer pipes 27 and 28 in which the through holes 30 are matched with each other at positions other than the through holes 30 by the middle transfer pipe 26, the transfer of the concrete 14 is closed, and The transport is controlled.

This structure is also employed in the connecting portions of the concrete conveying pipes 20 in the middle and lower stages on both sides of the movable formwork 16.

In addition, the transport of the concrete 14 is closed in the concrete transport pipes 20 which are not used in the connecting portions of the concrete transport pipes 20 in the middle and lower stages and the connecting portion between the concrete transport pipes 20 and the concrete discharge pipes 24. Closing plates 32 are provided so that they can be inserted and removed.

The transport of the concrete 14 to the other concrete transport pipes 20 and the concrete discharge pipe 24 is controlled by inserting the respective closing plates 32 into the respective concrete transport pipes 20 and closing the transport of the concrete 14. Can be.

A discharge valve (not shown) for discharging the concrete 14 remaining in the two pipes 20 and 22 is provided near the connection between the concrete transport pipe 20 and the concrete supply pipe 22.

A concrete diverter 34 is provided between each concrete transport pipe 20 and the concrete supply pipe 22.

In this embodiment, the concrete diverter 34
A plurality of concrete transport connecting pipes 38 are arranged in parallel on one side of the base frame 36, and a concrete supply connecting pipe 40 is movable on the other side of the base frame 36 via a moving mechanism (not shown) or the like. It is arranged in.

The concrete transfer pipes 20 and the concrete supply pipes 22 are connected to the concrete diverter 34 by connecting the concrete transfer pipes 20 to the concrete transfer connection pipes 38 and the concrete supply pipes 22 to the concrete supply connection pipes 40. , Through a joint 42.

Furthermore, the concrete supply pipe 22 is rotatably supported at two points in a U-shape at two points, and the concrete supply pipe 22 is supported at three points including the connection with the concrete supply connection pipe 40, so that each concrete transfer pipe is supported. At the time of connection switching of 20, the concrete supply pipe 22 is moved up and down and left and right so that the concrete supply pipe 22 is smoothly moved.

The movable formwork 16 is provided with a large number of inspection windows 44, and these inspection windows 44 are used as a concrete pouring port or used to check the state of the concrete being poured. Things.

In the drawing, reference numeral 46 denotes an existing secondary lining portion, and reference numeral 48 denotes an inner wall surface of a tunnel to which excavated or concrete for primary lining has been sprayed.

The method of placing the concrete 14 for secondary lining in the tunnel 12 using the present apparatus will be described in detail below.

First, the movable formwork 16 is moved to a predetermined position of the tunnel 12.

At this time, the wrap side (the side opposite to the tunnel excavation side) of the movable formwork 16 needs to be overlapped with the existing secondary lining portion 46.

Next, the concrete conveying pipe 20 is switched and connected by the concrete diverter 34 so that the concrete 14 is filled in the lower part of the movable formwork 16 on the wrap side.

In this embodiment, first, concrete 14 is transported to a concrete transport pipe 20 arranged at a lower side of one side in the width direction of the movable formwork 16 (right side in FIG. 1, lower side in FIG. 2). Next, the lower concrete transport pipe 20 on the other side of the movable form 16 in the width direction (the left side in FIG. 1 and the upper side in FIG. 2), the middle concrete transport pipe 20 on the movable form 16 and then the movable form 16 to the concrete transport pipe 20 at the upper stage,
Is transported.

Next, at the portion of each concrete discharge pipe 24 of the concrete transport pipe 20 switched and connected by the concrete diverter 34 connected to the concrete discharge pipe 24 to be used, the inner and outer transport pipes 26, 28, the concrete 14 can be transported, and the closing plate 32 is inserted into the vicinity of the connection between the concrete transport pipe 20 and the concrete discharge pipe 24 to be used to carry out another concrete discharge. The transfer of the concrete 14 to the pipe 24 is closed, and the transfer of the concrete 14 is controlled.

Next, the periphery of the movable side of the movable formwork 16 is securely covered (stopped), and a predetermined inspection window 44 is used as a concrete pouring port. The concrete discharge pipe 24 to be used is projected from the inspection window 44. Then, the concrete 14 is cast between the movable formwork 16 and the inner wall surface 48 of the tunnel.

At this time, the strength and durability of the concrete after curing and curing are improved by vibrating and compacting the poured concrete 14 via a vibrator (not shown) according to the amount of concrete poured. Is desirable.

Next, after the concrete 14 is poured, the concrete 14 is poured from another concrete discharge pipe 24 protruding from another inspection window 16.

At this time, at the connecting portion between the concrete transfer pipe 20 and the concrete discharge pipe 24 to be used, the middle transfer pipe 26 of the concrete transfer pipe 20 is rotated, and the middle transfer pipe 26 and the inner and outer transfer pipes 27 and 28 are rotated. Each through hole 30
And the concrete plate 14 can be transported, the closing plate 32 is inserted near the connection between the concrete transport pipe 20 and the concrete discharge pipe 24 to be used, and the concrete 14 is transported to another concrete discharge pipe 24. And the concrete discharge pipe 24
In the connection portion between the concrete transfer pipe 20 and the concrete transfer pipe 20, the through holes 30 of the inner and outer transfer pipes 27, 28 of the concrete transfer pipe 20 are rotated to the central transfer pipe 26, and are moved to locations other than the through holes 30 of the middle transfer pipe 26. The transport of the concrete 14 is closed by closing it, and the transport of the concrete 14 is controlled.

Next, after the concrete 14 is poured into the concrete transfer pipe 20, the connection between the concrete transfer pipe 20 and the concrete supply pipe 22 is released by the concrete diverter 34, and the other concrete transfer pipe 20 is connected. The concrete connection 14 is sequentially switched between the movable formwork 16 and the inner wall surface 48 of the tunnel.

Next, after the concrete casting at the location where the movable formwork 16 is installed is completed, the cast concrete is cured and hardened, and the movable formwork 16 is released.

The removal of the movable formwork 16 completes the placement of the concrete 14 for secondary lining in the tunnel 12.

Next, the movable formwork 16 is moved forward,
Switching the concrete supply pipe 22 and the concrete transport pipe 20 to be used, switching the concrete discharge pipe 24 to be used, placing the concrete 14, curing and curing the concrete 14, and removing the movable formwork 16 from the entire length of the tunnel 12. And continuously.

As described above, the switching connection between the concrete supply pipe 22 and the concrete transport pipe 20 to be used, and the concrete discharge pipe 2 used by the concrete transport pipe 20
4 can be switched very easily, and it is not necessary to perform the work of replacing the concrete transport pipe as in the conventional case, and it is possible to greatly shorten the construction period.

In the lengthwise direction of the movable formwork 16, the concrete 14 can be poured from the concrete discharge pipes 24 provided at each concrete transfer pipe 20, and the concrete transfer pipe 20 to be used can be cast. By simultaneously placing the concrete from each of the concrete discharge pipes 24, the construction period can be further shortened, and the concrete 1 is placed between the movable formwork 16 and the inner wall surface 48 of the tunnel.
Since 4 is uniformly filled, the quality, particularly the strength, can be improved.

In this embodiment, the concrete transfer pipe 20 has a triple structure at the connection between the concrete transfer pipes 20 and the connection between the concrete transfer pipe 20 and the concrete discharge pipe 24. The concrete 14 can be transported by matching the through holes 30 of the pipes 27 and 28, and the through holes 30 of the inner and outer transport pipes 27 and 28 are connected to the through holes 3 by the middle transport pipe 26.
The transport of the concrete 14 is closed by closing at a location other than 0. However, the concrete transport pipe 20 is not formed in a triple structure, and the unused concrete transport pipe 20 and the concrete discharge pipe 24 are closed plates. (Not shown) may be inserted to control the transport of the concrete 14, and other structures capable of controlling the transport of the concrete 14 may be freely used.

Further, the number of the concrete transfer pipes 20 and the concrete discharge pipes 24 provided in each concrete transfer pipe 20 are not limited to the present embodiment, and may be freely set to a number that is easy to handle.

Further, the concrete shunting machine 34 is
6, a plurality of connecting pipes 38 for transporting concrete are arranged in parallel on one side, and a connecting pipe 40 for supplying concrete is movably provided on the other side of the base frame 36. Concrete transfer pipe 20 using 22
Any structure may be used as long as it is connected to

Although only one concrete diverter 34 is provided on the movable formwork 16, two or more concrete diverters 34 are disposed on the movable formwork 16 and the inner wall surface 48 of the tunnel.
It is self-evident that the concrete 14 is simultaneously poured from a plurality of places, for example, the lower stage and the middle stage on both sides of the movable formwork 16.

The switching connection between the concrete transport pipe 20 and the concrete supply pipes 22 is performed by the concrete diverter 34, but it is obvious that the switching connection is manually performed by an operator.

The movable formwork 16 and the inner wall surface 4 of the tunnel
The concrete 14 is placed between the inspection windows 44 and
However, it is obvious that the concrete 14 is cast using the concrete casting port (not shown) formed in the movable formwork 16 separately from the inspection window 44.

The movable form 16 and the inner wall 4 of the tunnel
8, a concrete sensor (not shown) for detecting the amount of concrete placed between the concrete supply pipe 22 and the concrete discharge pipe 24 is provided. By linking the concrete casting, switching of the concrete transport pipe 20 and the concrete discharge pipe 24, etc., the work can be automated and workability can be improved.

The method and apparatus of the present invention are not particularly limited for use, such as a substantially semicircular tunnel, a circular tunnel, for example, an underwater tunnel and a sewer.

[0055]

According to the method and the apparatus for placing concrete for a tunnel according to the present invention, the concrete transfer pipe to be used after the concrete transfer pipe to be used among the plurality of concrete transfer pipes is connected to the concrete supply pipe. The concrete transport from the concrete supply pipe from each concrete discharge pipe of the transport pipe is sequentially or simultaneously poured between the movable formwork and the inner wall surface of the tunnel. There is no need to replace pipes, and the construction period can be greatly reduced.

Further, in the length direction of the movable formwork, concrete can be poured from several concrete discharge pipes provided in each concrete transport pipe, and concrete is simultaneously poured from each concrete discharge pipe. Thereby, the construction period can be further shortened, and concrete can be uniformly filled between the movable formwork and the inner wall surface of the tunnel, so that the quality, particularly the strength, can be improved.

Further, a connecting portion of each concrete conveying pipe,
And at the connection between the concrete transfer pipe and the concrete discharge pipe, the concrete transfer pipe has a triple structure,
The center transport pipe is made rotatable with respect to the internal and external transport pipes, through holes are drilled in each pipe, and concrete can be transported by matching each through hole. It is very easy to switch concrete transport by concrete transport pipe and concrete discharge pipe by closing concrete transport by closing the part other than through hole by the central transport pipe and controlling concrete transport. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a concrete casting device for a tunnel according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a longitudinal sectional view showing a connection portion between a concrete transport pipe and a concrete discharge pipe.

FIG. 4 is a front view of the same.

5 (a) is a plan view, FIG. 5 (b) is a front view, and FIG. 5 (c) is a side view showing the internal transfer pipe.

FIG. 6 is a front view showing an external transfer pipe.

7 (a) is a plan view, FIG. 7 (b) is a front view, and FIG.

8 (a) is a front view and FIG. 8 (b) is a side view showing a closing plate.

FIG. 9 is a schematic side view showing a concrete casting situation according to the present invention.

FIG. 10 is a front view showing a conventional concrete placing device for a tunnel.

FIG. 11 is a side view of the same.

FIG. 12 is a schematic side view showing the concrete casting situation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Tunnel 14 Concrete 16 Movable formwork 20 Concrete transport pipe 22 Concrete supply pipe 24 Concrete discharge pipe 26 Central transport pipe 27 Internal transport pipe 28 External transport pipe 30 Through hole 34 Concrete diverter 48 Tunnel inner wall surface

Claims (4)

[Claims] 1. A method of placing concrete (14) for secondary lining using a movable formwork (16) in a tunnel (12), wherein a plurality of concrete forms (14) are arranged in the movable formwork (16). Concrete transport pipe (20) to be used among the installed concrete transport pipes (20),
Concrete supply pipe (22) installed in movable formwork (16)
After being connected, concrete transport pipe (20) to be used
Concrete discharge pipes installed at several locations along the length of the
(24), concrete (14) supplied from a concrete supply pipe (22) is sequentially or simultaneously poured between a movable formwork (16) and a tunnel inner wall surface (48). Concrete placement method for tunnels. 2. A connecting portion of each concrete conveying pipe (20),
And concrete transfer pipe (20) and concrete discharge pipe (2
At the connection with 4), the concrete transport pipe (20) has a triple structure, and the central transport pipe (26) is the inner and outer transport pipes (27), (28)
The concrete (14) can be transported by matching the through holes (30) perforated in the transport pipes (26), (27), and (28). By closing the through holes (30) of the pipes (27) and (28) at locations other than the through holes (30) with the central transport pipe (26), the transport of the concrete (14) is closed and the concrete 2. The concrete casting method for a tunnel according to claim 1, wherein the control of the transport of the concrete (14) to the transport pipe (20) and each concrete discharge pipe (24) is controlled. 3. An apparatus for placing concrete (14) for secondary lining using a movable formwork (16) in a tunnel (12). Concrete transport pipes (2) with concrete discharge pipes (24) at several locations
0) and a concrete supply pipe (22) are arranged, respectively, and after connecting the concrete supply pipe (22) and a predetermined concrete transfer pipe (20) to be used, the concrete transfer pipe (20) to be used is Concrete (14) supplied from concrete supply pipe (22) from each concrete discharge pipe (24)
Sequentially or simultaneously with the movable formwork (16) and the inner wall of the tunnel
A concrete casting device for tunnels to be cast between (48). 4. A connecting portion of each concrete conveying pipe (20),
And concrete transfer pipe (20) and concrete discharge pipe (2
At the connection with 4), the concrete transport pipe (20) has a triple structure, and the central transport pipe (26) is the inner and outer transport pipes (27), (28)
The concrete (14) can be transported by matching the through holes (30) perforated in the transport pipes (26), (27), and (28). By closing the through holes (30) of the pipes (27) and (28) at locations other than the through holes (30) with the central transport pipe (26), the transport of the concrete (14) is closed and the concrete 4. The concrete placing device for a tunnel according to claim 3, wherein the concrete is transported to the transport pipe and each concrete discharge pipe.