JP4283419B2 - Method and apparatus for fixing concrete for tunnel lining - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for securely locking (covering) the periphery of a wife side (tunnel excavation side) of a formwork for placing lining concrete when placing lining concrete in a tunnel. And the apparatus.
In the present specification, “laying” means filling mud concrete that has not been cured and cured between the mold and the inner wall surface of the tunnel.
[0002]
[Prior art]
Originally, the placement of concrete for lining in tunnels was carried out by folding the formwork for placing concrete, folding it forward, placing it, and installing it. I was placing concrete.
[0003]
When placing concrete between this formwork and the inner wall surface of the tunnel, in order to prevent the cast concrete from leaking out of the formwork, a flat plate is formed on the periphery of the formwork's wife side (tunnel excavation side). By fixing a large number of the end plates through the attachment material, the end side periphery of the mold was fixed (covered) (see FIG. 7).
[0004]
In addition, because the concrete thickness of the tunnel (the distance between the inner wall surface of the tunnel and the formwork) is not constant, the tread board is used by the worker at the work site by cutting the tread board and adjusting its size each time. It was.
[0005]
Further, the periphery of the formwork side of the mold (on the opposite side to the tunnel excavation side) is superposed on the existing concrete casting part, so it was not necessary to coat it.
[0006]
It should be noted that the coating of the periphery on the wellhead side of the formwork is necessary only at the time of the first concrete placement, but at that time, it was covered with the face plate as described above.
[0007]
In FIG. 7, reference numeral 60 denotes a face plate, 62 denotes a mounting material, 64 denotes a tunnel inner wall surface, and 66 denotes a mold.
[0008]
[Problems to be solved by the invention]
Conventionally, since the wives were used by the workers after adjusting the size with a wooden frame etc. on the spot each time, the adjustment work was very troublesome and even a skilled person required time. It was.
[0009]
In addition, there was a problem that there was no reuse value of the wives once used.
[0010]
In view of such drawbacks, an object of the present invention is to provide a method and an apparatus for anchoring concrete for tunnel lining that can improve the anchorage work efficiency of a formwork with a simple structure. is there.
[0011]
[Means for Solving the Problems]
The present invention, in the step of placing concrete for lining through a formwork in a tunnel, is arranged so as to be able to move up and down and tilt along the peripheral edge of the formwork and corresponds to the inner wall surface of the tunnel Each wife frame having a contact portion on the surface is guided and supported by a guide disposed on the mold frame and is raised to the inner wall surface side of the tunnel, and the abutment portion is brought into contact with the inner wall surface of the tunnel. It is characterized by preventing leakage of concrete to be placed in the mold by interposing a closing plate in the space formed between each wife frame raised to the side and closing the space Or, if the concrete thickness of the tunnel is partially high, after the wife frame is tilted and stored in the formwork, a wife plate corresponding to the concrete thickness is installed on the outer periphery of the formwork to stop the wife. Features or formed between each wife frame The means for interposing the obstruction plate into the space was inserted into the outer portion in the width direction between the end frames and the support portion for the obstruction plate formed by extending the inner side in the width direction of the end frames outward. It is composed of a fastening pipe and a wedge material to be inserted between the closing plate and the fastening pipe, and the closing plate is inserted between the fastening pipe inserted between each end frame and the supporting member for the closing plate. The wedge material is inserted between the fastening pipe and the closing plate, and the closing plate is fixed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The concrete anchoring device for tunnel lining according to the present invention covers a tunnel 16 in which a reinforcing material 12 such as a reinforcing bar is assembled along the inner wall surface 14 of the tunnel in order to reinforce the rock mass and increase the strength of the lining concrete. It is mounted on a movable mold 20 for placing the concrete 18 for construction.
[0013]
In the mold 20 used in the present invention, the upper circle portion 22 and the lower circle portion 24 can be folded and conveyed.
[0014]
As shown in FIGS. 1 to 5, the concrete lining device for tunnel lining according to the present invention has the following configuration.
[0015]
At the periphery of the formwork 20 on the wife side (tunnel excavation side), a wife frame 28 having a contact portion 26 corresponding to the inner wall surface 14 of the tunnel on the surface rises and falls over the entire length (circumferential direction) of the formwork 20. Arranged freely.
[0016]
In this example, the contact part 26 is an airbag, and the end frame 28 is arranged in a state of being divided into a plurality along the circumferential direction of the mold frame 20.
[0017]
This airbag is made of rubber, and an air inlet (not shown) is provided at the center in the length direction, and a hook (not shown) for locking to a holding rod 32 described later is provided at an important point. Installed.
[0018]
In addition, a guide 30 for guiding and supporting the wife frame 28 when the wife frame 28 is raised and lowered is disposed on the upper side of the mold frame 20.
[0019]
In this example, the guide 30 is a roller body, and the guide frame 30 guides and supports the wife frame 28 when it is raised and lowered, so that the wife frame 28 can be prevented from tilting downward due to its own weight. It is not necessary to support the weight of the wife frame 28 by the hydraulic cylinder 34 that is the wife frame raising / lowering means, and the hydraulic cylinder 34 can be downsized.
[0020]
In addition, a holding rod 32 for controlling the outward movement of the airbag, which is the contact portion 26, on the outer side of the wife frame 28 (upper right side in FIG. 2) with respect to the wife frame 28. A plurality are arranged so as to be vertically movable in the vertical direction.
[0021]
The reason why the holding bar 32 can be moved up and down is to facilitate replacement of the airbag as the contact portion 26.
[0022]
The lifting means for each wife frame 28 is a hydraulic cylinder 34 attached to both ends of each wife frame 28 in the length direction.
[0023]
FIGS. 4 and 5 show a closing plate 36 for closing the space formed between the wife frames 28 when the wife frames 28 are raised.
[0024]
The closing plate 36 is for interposing in each space because a space is formed between each frame 28 when each frame 28 is lifted from the mold 20, and its structure is elastically deformable. A flat plate formed of an elastic material.
[0025]
Means for interposing the closing plate 36 between the wife frames 28 include a closing plate support portion 38 formed by extending the inside of the width direction of each wife frame 28 outward, and the width of each wife frame 28. It is comprised by the fastening pipe 40 inserted in the outer side of the direction, and the wedge material 42 inserted between the obstruction board 36 and the fastening pipe 40. FIG.
[0026]
The intervening method of the closing plate 36 between the wife frames 28 is to insert the closing plate 36 between the fixing pipe 40 inserted between the wife frames 28 and the supporting member 38 for the closing plate, so that the fixing pipe is used. The wedge material 42 is fitted between the closing plate 36 and the closing plate 36, and the closing plate 36 is fixed.
[0027]
For this reason, the obstruction board 36 can be easily intervened and work efficiency can be improved.
[0028]
In the figure, reference numeral 44 denotes a support plate attached to the end frame 28 when the concrete thickness of the tunnel 16 is high, and reference numeral 46 denotes a support plate for supporting the end plate 44.
[0029]
When laying concrete 18 for lining between the formwork 20 and the tunnel inner wall surface 14 on which the reinforcing material 12 is assembled using this apparatus, the periphery of the formwork 20 on the wife side (tunnel excavation side) The method for locking (covering) the wire will be described in detail below.
[0030]
The tunnel inner wall surface 14 in this example is a tunnel peripheral surface in which primary lining concrete is covered with a tunnel excavation surface excavated in a substantially semicircular shape by a rock crusher or the like.
[0031]
First, the mold 20 is moved to a predetermined position in the tunnel 16.
[0032]
At this time, it is necessary to superimpose the wellhead side of the mold 20 (on the side opposite to the tunnel excavation side) with the already-cast concrete placement part.
[0033]
Next, each wife frame 28 is raised to the tunnel inner wall surface 14 side via the hydraulic cylinder 34, and the airbag that is the contact portion 26 of the wife frame 28 is primarily inflated, so that the upper surface of the airbag is placed on the inner wall surface 14 of the tunnel. Lightly touch the surface.
[0034]
At this time, since the wife frame 28 is guided and supported by the guide 30, it is possible to prevent the wife frame 28 from being tilted downward by its own weight, and the wife frame is lowered by the hydraulic cylinder 34 which is the wife frame lifting means. Therefore, it is not necessary to support the weight of 28, and the weight of the wife frame 28 applied to the hydraulic cylinder 34 can be drastically reduced. As a result, the hydraulic cylinder 34 can be reduced in size and the cost can be reduced.
[0035]
Next, the closing plate 36 is caused to intervene in the space between the wife frames 28 raised from the mold 28.
[0036]
At this time, the intervention of the closing plate 36 in the space between each wife frame 28 is performed by inserting the closing plate 36 between the fastening pipe 40 inserted between each wife frame 28 and the supporting member 38 for the closing plate. Since the wedge material 42 is fitted between the fastening pipe 40 and the closing plate 36 and the closing plate 36 is fixed, the intervention work of the closing plate 36 becomes extremely easy.
[0037]
Next, the airbag which is the contact portion 26 is finally inflated, and the upper surface of the airbag is brought into close contact with the inner wall surface 14 of the tunnel.
[0038]
Along with the intimate contact of the airbag, which is the abutting portion 26 of the end frame 28, with the inflated contact with the inner wall surface 14 of the tunnel, the holding bar 32 disposed on the outer side surface of the end frame 28 is inflated on the outer side surface of the airbag. Abut.
[0039]
The movement of the airbag is controlled by the contact of the holding bar 32 with the airbag.
[0040]
Further, the movement of the airbag can be more reliably controlled by engaging the hook (not shown) of the airbag, which is the contact portion 26, with the holding rod 32.
[0041]
The hook of the airbag to the holding rod 32 is locked when the airbag is installed or after the primary or final inflation of the airbag.
[0042]
By the above-mentioned process, the wife side periphery of the mold 20 is securely fixed (covered).
[0043]
Thereafter, concrete 18 is placed between the inner wall surface 14 of the tunnel and the mold 20 to cure and harden the concrete 18.
[0044]
The placement of the concrete 18 is sequentially performed on the lower part of the tunnel 16 on the wellhead side, on the lower part of the tunnel 16 on the wife side, on the upper part of the tunnel 16 on the wellhead side, and on the upper part of the tunnel 16 on the wife side.
[0045]
In addition, after the concrete 18 is cured and cured, the wife stop by the wife frame 28 is released for the next use.
[0046]
At this time, the airbag which is the contact portion 26 on the surface of each wife frame 28 is contracted to remove the closing plate 36 interposed between each wife frame 28, and each wife frame 28 is lowered.
[0047]
This example is an example in which the wife frame 28 is attached to the periphery of the wife side of the mold frame 20. However, when the concrete winding thickness of the tunnel 16 is partially high, that is, between the tunnel inner wall surface 14 and the mold frame 20. When the distance between them is long, it is not sufficient to stop the end with the end frame 28, so it is necessary to stop the end with the end plate 44 corresponding to the concrete thickness, and the process will be described below.
[0048]
First, on the wife side of the mold 20, each wife frame 28 at a location where the concrete winding thickness is high is tilted outward in a state where the concrete frame 28 is lowered, and is stored in the mold 20.
[0049]
The reason for tilting each end frame 28 is to secure an installation space for the end plates 44 corresponding to the concrete winding thickness.
[0050]
Thereafter, the end plate 44 is installed above the end side of the mold 20 via the support plate 46, and the end plate 44 is brought into contact with the tunnel inner wall surface 14 side via the lifting mechanism of the mold 20. Stop the wife side.
[0051]
At this time, since the entire area on the wife side of the mold 20 is fixed to the wife plate 44, it is not necessary to use the closing plate 36, and the closing plate 36 can be omitted.
[0052]
Next, the concrete 18 is placed, and after curing and curing, the end plate 44 is removed, and the mold 20 is lowered to prepare for the next process.
[0053]
In both examples, the mold 20 is foldable, but is not necessarily limited to foldable.
[0054]
Further, although the wife frame 28 is divided into a plurality of parts in the circumferential direction of the mold frame 20, it is free to have a size corresponding to the entire circumference of the mold frame 20.
[0055]
The contact portion 26 is an airbag. However, as shown in FIG. 6, by using an elastic body (see reference numeral 48) that can be elastically deformed, the air supply mechanism can be omitted, It is also free to make a wavy board.
[0056]
The guide 30 for guiding and supporting the wife frame 28 is a roller body, but an L-shaped or flat structure may be adopted, and other shapes and structures capable of guiding and supporting the wife frame 28 may be adopted. Is free.
[0057]
The lifting mechanism of the wife frame 28 is based on the hydraulic cylinder 34, but it may be based on a shaft and a geared motor as long as it can be lifted and lowered.
[0058]
Moreover, although the tunnel 16 is a substantially semicircular tunnel, it can also be used when casting concrete in a circular tunnel, such as an underwater tunnel or a sewer.
[0059]
In addition, the method and apparatus according to the present invention are effective for anchoring the wife side of the formwork 20 in the tunnel 16 in which the reinforcement member 12 is assembled along the inner wall surface 14 of the tunnel. It is self-evident that the abutting portion 26 of the end frame 28 is in close contact with the inner wall surface 14 of the tunnel even when the end of the frame 20 in the tunnel 16 is not assembled.
[0060]
【The invention's effect】
According to the concrete lining method for tunnel lining according to the present invention and the apparatus thereof, each of the wife frames that can be raised and lowered and tilted at the periphery of the wife of the mold is guided and supported by a guide disposed on the mold, While raising to the inner wall surface side of the tunnel, the abutting part of the wife frame is brought into contact with the inner wall surface of the tunnel, and a blocking plate is interposed in the space formed between each of the wife frames raised to the inner wall surface side of the tunnel. Due to the extremely simple structure that closes the part, it is possible to prevent leakage of concrete to be placed in the formwork, and there is no adjustment and fixing work of the tapping plate, which has been conventionally performed, and the work burden can be drastically reduced.
[0061]
In addition, since the wife frame is guided and supported by the guide when the wife frame is raised and lowered, it is possible to prevent the wife frame from tilting downward due to its own weight, and the weight of the wife frame is supported by a hydraulic cylinder that is a means for lifting the wife frame. This eliminates the need to reduce the weight of the frame on the hydraulic cylinder, thereby reducing the size of the hydraulic cylinder and reducing manufacturing costs.
[0062]
Also, when the concrete thickness of the tunnel is partially high, the end frame is tilted and stored in the formwork, and sufficient space for installing the end plate corresponding to the concrete thickness is secured. By installing the end plate and stopping the end, even when the concrete winding thickness is high, leakage of the concrete to be placed in the mold can be surely prevented.
[0063]
Also, the means for interposing the obstruction plate into the space formed between the wife frames was inserted between the obstruction plate support portions formed by extending outward from the wife frames, and between the wife frames. The closure plate is formed between the fastening pipe inserted between each frame and the closure plate supporting portion by being constituted by the fastening pipe and the wedge material fitted between the closure plate and the fastening pipe. Can be inserted, a wedge material can be inserted between the fastening pipe and the closing plate, and the closing plate can be fixed, and the intervention workability of the closing plate can be improved.
[Brief description of the drawings]
FIG. 1 is a front view of a formwork equipped with a concrete lining device for tunnel lining according to the present invention.
FIG. 2 is an enlarged side view of a main part showing a used state of a wife frame.
FIG. 3 is an enlarged side view of a main part showing a state in which the end frame is not used (use end plate).
FIG. 4 is a plan view showing an intervention state of a closing plate.
FIG. 5 is a rear view of the same.
FIG. 6 is an enlarged side view of a main part showing another example of a contact part of a wife frame.
FIG. 7 is a main part front view showing a conventional technique.
[Explanation of symbols]
12 Reinforcement material 14 Tunnel inner wall surface 16 Tunnel 18 Concrete 20 Form frame 26 Abutting portion 28 End frame 30 Guide 36 Blocking plate 38 Blocking plate support portion 40 Fastening pipe 42 Wedge material 44 End plate

Claims (6)

In the process of placing concrete (18) for lining through the formwork (20) in the tunnel (16),
Each wife frame (28) provided on the surface with a contact portion (26) corresponding to the inner wall surface (14) of the tunnel, which is disposed so as to be able to be raised and lowered along the periphery of the wife side of the formwork (20). The guide (30) disposed on the mold (20) is guided and supported, and is raised toward the tunnel inner wall surface (14), and the abutting portion (26) is brought into contact with the tunnel inner wall surface (14),
The closing plate (36) is inserted into the space formed between the wife frames (28) raised to the inner wall surface (14) of the tunnel, and the space is closed, thereby placing it in the mold (20). A method of locking concrete for tunnel lining, characterized by preventing leakage of concrete (18) to be installed. When the concrete roll thickness of the tunnel (16) is partially high, after the wife frame (28) is tilted and stored in the formwork (20), it corresponds to the concrete roll thickness on the outer peripheral edge of the formwork (28). 2. The method for locking concrete lining for tunnel lining according to claim 1, characterized in that the locking plate (44) is installed and fixed. For the obstruction plate formed by extending the inner side in the width direction of each wife frame (28) as the intervention means of the obstruction plate (36) into the space formed between each wife frame (28) A support (38);
A fastening pipe (40) inserted on the outside in the width direction between each wife frame (28);
A wedge material (42) inserted between the closing plate (36) and the fastening pipe (40);
Consisting of
The closing plate (36) is inserted between the fastening pipe (40) inserted between each end frame (28) and the supporting portion (38) for the closing plate, and the fastening pipe (40) and the closing plate (36 2. The method for retaining concrete for tunnel lining according to claim 1, wherein the wedge material (42) is fitted between the two and the closing plate (36) is fixed. In the process of placing concrete (18) for lining through the formwork (20) in the tunnel (16),
A wife frame (28) provided on the surface with a contact portion (26) corresponding to the inner wall surface (14) of the tunnel, which is disposed so as to be movable up and down and tilted on the periphery of the wife side of the mold (20),
A guide (30) for guiding and supporting the wife frame (28) when ascending and descending;
A blocking plate (36) intervening in the space formed between each wife frame (28) raised to the tunnel inner wall surface (14) side,
Consists of
Each wife frame (28) is guided and supported by the guide (30) and raised toward the inner wall surface (14) of the tunnel, and the contact portion (26) is brought into contact with the inner wall surface (14) of the tunnel,
By placing a closing plate (36) in the space formed between the wife frames (28) raised to the inner wall surface (14) of the tunnel, the space is closed, and the space is closed in the mold (20). A concrete anchoring device for tunnel lining, which prevents leakage of concrete (18) to be installed. When the concrete roll thickness of the tunnel (16) is partially high, after the wife frame (28) is tilted and stored in the mold frame (20), it corresponds to the concrete roll thickness on the outer peripheral edge of the mold frame (20). 5. A concrete anchoring device for tunnel lining according to claim 4, wherein the anchoring plate (44) is installed and anchored. For the obstruction plate formed by extending the inner side in the width direction of each wife frame (28) as the intervention means of the obstruction plate (36) into the space formed between each wife frame (28) A support (38);
A fastening pipe (40) inserted on the outside in the width direction between each wife frame (29);
A wedge material (42) inserted between the closing plate (36) and the fastening pipe (40);
Consisting of
The closing plate (36) is inserted between the fastening pipe (40) inserted between each end frame (28) and the supporting portion (38) for the closing plate, and the fastening pipe (40) and the closing plate (36 5. The wedge support device for concrete for tunnel lining according to claim 4, wherein the wedge material (42) is fitted between the two and the closing plate (36) is fixed.

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