JP3580598B2 - Method and apparatus for placing concrete on tunnel road surface - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a method and an apparatus for efficiently placing concrete on a tunnel road surface .
[0002]
[Prior art]
Generally, there is a method shown in FIG. 7 as a method for placing concrete on a tunnel road surface . In the center of the road surface portion 2 of the tunnel, a groove portion 1 which is to be an inspection passage later is provided. When placing concrete on the road surface 2, a formwork 5 is installed on the road surface 2, and then a reinforcing bar 6 is arranged in the formwork 5. On the other hand, the concrete pump truck 20 rides on the road surface portion 2, and the concrete supply pipe 40 is connected to the concrete pump truck 20. The concrete supply pipe 40 is connected at a plurality of connection points 41, and a flexible nozzle 42 is provided at the tip. Thus, by sequentially disconnecting the connection points 41, the entire area within the mold 5 can be covered.
[0003]
Then, at the time of actual construction, the concrete supply pipe 40 is extended to the inside A of the tunnel, and concrete is first poured into the first formwork 5. Here, since there is a limit to the range that the flexible nozzle 42 can cover, the connection points 41 are sequentially cut off, and the placing operation is performed while replacing the flexible nozzle 42.
[0004]
Then, after the concrete 50 has been poured into the entire area of the formwork 5 of the first section, the next formwork 5 is installed, and the casting work is performed in the same manner.
In addition, these series of operations are all performed manually.
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional method, since it is necessary to manually connect and disconnect the heavy concrete supply pipe 40, there is a problem in that manual work is required and work efficiency is extremely low. Moreover, since the concrete supply pipe 40 needs to be piped in the formwork 5, there is a possibility that the reinforcing bar 6 may be deformed. In addition, since the above-described connection work must be performed on the reinforcing bar, the scaffold is poor and safety is reduced. There is also a problem of lacking.
[0006]
The present invention has been made in view of the above-mentioned matters, and a concrete casting method that can greatly reduce labor and greatly improve work efficiency and has no risk of deforming a reinforcing bar. Making it a technical issue.
[0007]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention adopts the following method in a concrete placing method on a tunnel road surface for placing concrete on a road surface portion 2 having a groove portion 1 in the center.
[0008]
That is, the present invention is the provision of the carriage 3 which moves by being guided in the groove 1 step, a step of placing the concrete supply pipe 4 on the carriage 3, the mold with the exception of the groove 1 in the road section 2 5; a step of arranging a reinforcing bar 6 in the formwork 5; and a step of connecting a concrete supply section 7 to the concrete supply pipe 4 from the concrete supply section 7 to the formwork 5. After concrete is cast, the bogie 3 is moved and concrete is sequentially poured into the newly erected formwork 5.
[0009]
Here, the groove 1 can be, for example, a concave section having a rectangular cross section, and the carriage 3 can be movably provided on an inner surface of the groove 1, that is, a bottom surface and a side surface via a roller or the like.
[0010]
The concrete supply unit 7 can be, for example, a concrete pump truck. It is needless to say that the self-propelled type is not necessarily required. In addition, the present invention provides a step of providing a truck 3 which is guided and moved in the groove 1 , a step of placing a concrete supply pipe 4 on the truck 3, and a formwork except for the groove 1 in the road surface portion 2. 5, a step of arranging a reinforcing bar 6 in the formwork 5, a step of connecting a concrete supply section 7 to the concrete supply pipe 4, and a step of guiding the concrete supply section 7 into the groove 1 . And placing it on the moving supporting trolley 8. After the concrete is cast from the concrete supply unit 7 to the formwork 5, the trolley 3 and the supporting trolley 8 are moved and newly erected. Concrete is sequentially poured into the formwork 5.
[0011]
Here, the support cart 8 has, for example, an area capable of mounting a concrete pump truck, and is movable on the inner surface of the groove 1, that is, the bottom and side surfaces via rollers and the like, like the cart 3. Can be provided.
[0012]
The present invention is composed of the essential components described above, but it is needless to say that the present invention can be realized even when a concrete carry-in vehicle such as a concrete mixer is added. Furthermore, in the present invention, a carriage 3 which moves by being guided by the groove portion 1, a concrete supply pipe 4 which is placed on the carriage 3, and a concrete supply unit 7 connected to said concrete feed pipe 4 The concrete supply pipe 4 was configured to be able to supply concrete while moving the tip of the concrete supply pipe 4 to an arbitrary position.
[0013]
[Action]
When pouring concrete, first, the formwork 5 is installed on the road surface portion 2 located on the left and right of the groove portion 1. This formwork 5 is installed from the back side of the tunnel.
[0014]
Then, a reinforcing bar 6 is disposed in the formwork 5.
The concrete supply pipe 4 is movable by a cart 3. Therefore, the concrete supply pipe 4 can be arbitrarily moved to any place in the formwork 5. Thereby, the concrete is easily poured into the formwork 5.
[0015]
When the concrete placement on the first formwork 5 is completed as described above, the trolley 3 and the support trolley 8 are moved and concrete is sequentially placed on the newly installed formwork 5.
Unlike the above-described conventional method, the concrete supply pipe 4 does not enter the formwork 5, so that only a minimum number of workers are required during the casting operation.
[0016]
【Example】
An embodiment of the present invention will be described with reference to FIGS.
First, an apparatus used for implementing the present invention will be described.
[0017]
FIG. 1 is a top view of a road surface inside a tunnel, and a groove 1 is provided at the center of a road surface 2. As shown in FIGS. 4 and 5, the groove 1 has a rectangular cross section, a depth of 490 mm and a width of 1000 mm. In addition, drain grooves 1 a are formed on both sides of the bottom of the groove 1.
[0018]
The road surface portion 2 is pre-cast with concrete as a groundwork, but the present invention is to cast the concrete on the ground.
A carriage 3 is provided in the groove 1 to move along the groove 1. As shown in FIGS. 2 and 3, the carriage 3 is configured by providing a floor frame 3a and a side wall pulley 3c on a tubular frame 3a. The floor pulley 3b is provided with wheels running on the bottom of the groove 1 while contacting the ground, while the side wall pulley 3c is provided with wheels facing the side wall of the groove 1. A clearance of 15 mm is set between the side wall pulley 3c and the side wall of the groove 1. For this reason, the wheels provided on both sides of the side wall pulley 3c do not contact the side wall at all or only one of them touches the side wall. Further, a first towing lever 3d for towing the frame 3a is connected to the frame 3a.
[0019]
A concrete supply pipe 4 is placed on the carriage 3. A clamp 3e is provided on the carriage 3 so as to detachably hold the concrete supply pipe 4. A flexible hose 4a is connected to the base end of the concrete supply pipe 4, and the flexible hose 4a is supported by a flexible hose anti-swing clamp 3f erected on the carriage 3.
[0020]
On the other hand, a flexible hose 4b is provided at the tip of the concrete supply pipe 4, and concrete is discharged from the tip nozzle 4c.
A support cart 8 is connected to a tip of the first pulling lever 3d. The support cart 8 is for placing the concrete supply unit 7 such as a concrete pump truck, and includes a placing plate 8a, a floor pulley 8b and a side wall pulley 8d provided on the lower surface of the placing plate 8a. Is provided. The floor pulley 8b is provided with a wheel 8c running on the bottom of the groove 1 on the ground, while the side wall pulley 8d is provided with a wheel facing the side wall of the groove 1.
[0021]
A clearance of 15 mm is set between the side wall pulley 8d and the side wall of the groove 1. A wheel stop 8e is provided on the upper surface of the mounting plate 8a so that the concrete pump truck does not move carelessly. A second traction lever 8f is connected to one end of the placing plate 8a, and a traction crawler 8g is connected to the second traction lever 8f. Thus, the support truck 8, that is, the concrete supply unit 7 such as a concrete pump truck can be moved as the towing crawler 8g travels. As described above, since the concrete supply unit 7 is movable, the concrete supply unit 7 does not necessarily need to be a self-propelled type like a concrete pump truck. The width of the mounting plate 8a is about 2430 mm, and the length is about 7500 mm.
[0022]
In the above-described configuration, when casting concrete, first, the formwork 5 is installed on the road surface portion 2 located on the left and right of the groove portion 1. This formwork 5 is installed from the back A side of the tunnel. Then, a reinforcing bar 6 is disposed in the formwork 5. The reinforcing bar 6 is a net formed by vertical lines and horizontal lines.
[0023]
The concrete supply pipe 4 is movable in the direction of arrow F by the bogie 3. Therefore, the tip nozzle 4c can be arbitrarily moved to any location in the mold 5. Thereby, concrete can be easily poured into the formwork 5. Concrete is supplied to the concrete pump truck by the concrete mixer 9.
[0024]
When the concrete placement on the first formwork 5 is completed as described above, the trolley 3 and the support trolley 8 are moved and concrete is sequentially placed on the newly installed formwork 5.
Unlike the conventional method described above, since the concrete supply pipe 4 does not enter the formwork 5, the required number of workers is reduced during the casting operation, and the reinforcing bar 6 is not likely to be deformed. In addition, connection and disconnection of the concrete supply pipe 4 are not required, so that significant labor savings have been made possible.
[0025]
Furthermore, since the unconcreted part or the invert is widely vacant, it is possible to precede the laying of the mold and the reinforcing bar, and the construction efficiency is remarkably improved. It is especially effective for placing reinforced concrete in the basement of long tunnels.
[0026]
In the above-described embodiment, the description has been made of the one having the support cart 8, but in short, it is not essential if the concrete supply pipe 4 and the concrete supply part 7 move integrally, since the intended purpose can be achieved.
[0027]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while being able to discharge concrete to an arbitrary place, since a concrete supply pipe is located in the groove part which does not interfere, a large number of labor savings can be achieved in the concrete pouring process. In addition, work efficiency can be greatly improved.
[0028]
In addition, there is no fear of deforming the rebar, and the safety of the worker can be greatly improved.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an embodiment of the present invention.
FIG. 2 is an overall side view showing an embodiment of the present invention.
FIG. 3 is an overall plan view showing an embodiment of the present invention.
FIG. 4 is a vertical sectional view of a road surface showing an embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of a road surface showing an embodiment of the present invention.
FIG. 6 is a plan view of a construction process showing an embodiment of the present invention.
FIG. 7 is a plan view showing a conventional concrete placing method.
[Explanation of symbols]
1. Groove,
2 ・ ・ Road surface,
3 ・ Dolly,
4. Concrete supply pipe,
5 ... formwork,
6. Rebar,
7. Concrete supply department,
8. Support cart.

Claims (3)

In a concrete placing method on a tunnel road surface for placing concrete on a road surface portion having a groove portion in the center,
A step of providing a carriage guided and moved in the groove , a step of placing a concrete supply pipe on the carriage, a step of erecting a formwork on the road surface except for the groove , and a reinforcing bar in the formwork. And a step of connecting a concrete supply section to the concrete supply pipe, and after placing concrete from the concrete supply section to the formwork, the carriage is moved and newly erected . A concrete placing method on a tunnel road surface, wherein concrete is placed sequentially on a formwork. In a concrete placing method on a tunnel road surface for placing concrete on a road surface portion having a groove portion in the center,
A step of providing a carriage guided and moved in the groove , a step of placing a concrete supply pipe on the carriage, a step of erecting a formwork on the road surface except for the groove , and a reinforcing bar in the formwork. Arranging a concrete supply section to the concrete supply pipe, placing the concrete supply section on a support truck that moves while being guided in the groove , and after concreting into the mold, concrete設方method in tunnel road, characterized by pouring sequentially concrete to the newly erected the mold by moving the carriage and the support carriage. A concrete placement device on a tunnel road surface for placing concrete on a road surface portion having a groove portion in the center,
A dolly guided and moved in the groove , a concrete supply pipe placed on the dolly, and a concrete supply section connected to the concrete supply pipe, and a tip of the concrete supply pipe is positioned at an arbitrary position. concreting device in tunnel road characterized by the while moving can concrete supply Turkey on.

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