JPH08284598A - Method and equipment for placing concrete in tunnel - Google Patents

Abstract

PURPOSE: To improve operating efficiency largely by labor saving while preventing possibility that a reinforcement is deformed. CONSTITUTION: A process, in which trucks 3 moved along a groove section 1 are installed, and a process, in which a concrete feed pipe 4 is placed on the trucks 3, are provided, and forms 5 are set up on a road surface section 2. Reinforcements 6 are arranged into the forms 5. A concrete feed section 7 is connected to the concrete feed pipe 4. Concrete is placed into forms 5 from the concrete feed section 7, and the trucks 3 are moved and concrete is placed successively into anew mounted forms 5.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for efficiently placing concrete in a tunnel.

[0002]

2. Description of the Related Art Generally, as a concrete pouring method in a tunnel, there is a method shown in FIG. At the center of the road surface portion 2 of the tunnel, there is provided a groove portion 1 which will be an inspection passage later. When placing concrete on the road surface portion 2, the form frame 5 is installed on the road surface portion 2 and then the reinforcing bars 6 are arranged in the form frame 5. On the other hand, the concrete pump truck 20
The concrete pump truck 20
The concrete supply pipe 40 is connected to. The concrete supply pipe 40 is connected at a plurality of connection points 41, and a flexible nozzle 42 is provided at the tip. As a result, it is possible to cover the entire inside of the mold 5 by sequentially disconnecting the connection points 41.

In actual construction, the concrete supply pipe 40 is extended to the inner part A of the tunnel, and concrete is first placed in the first formwork 5. 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 placement operation is performed while replacing the flexible nozzle 42.

After the concrete 50 is placed in the entire area of the mold 5 in the first section, the next form 5 is installed and the placing work is performed in the same manner. In addition, all of these series of operations are performed manually.

[0005]

However, in the conventional method described above, the heavy concrete supply pipe 40 is used.
Since it is necessary to connect and disconnect by hand,
There is a problem that labor is required and work efficiency is extremely low. Further, since the concrete supply pipe 40 needs to be installed in the form 5, there is a risk of deforming the reinforcing bar 6. Further, since the above-mentioned connecting work must be performed on the reinforcing bar, the scaffolding is bad and the safety is improved. There is also a problem of lacking.

The present invention has been made in view of the above-mentioned matters, and it is possible to significantly reduce the labor and improve the working efficiency significantly, and at the same time, there is no fear of deforming the reinforcing bar. It is a technical issue to provide an installation method.

[0007]

In order to solve the above technical problems, the present invention provides a concrete placing method in a tunnel for placing concrete on a road surface portion 2 having a groove portion 1 in the center as follows. It was a method.

That is, in the method of claim 1, the step of providing the carriage 3 that moves along the groove portion 1, and the carriage 3
The step of placing the concrete supply pipe 4 on it, the step of installing the form 5 on the road surface part 2, the step of disposing the reinforcing bar 6 in the form 5, the concrete supply part 7 on the concrete supply pipe 4. After the concrete is supplied from the concrete supply unit 7 to the formwork 5, the dolly 3 is moved to sequentially place the concrete on the newly installed formwork 5.

Here, the groove portion 1 can be, for example, a recess having a rectangular cross section, and the carriage 3 can be movably provided on the inner surface of the groove portion 1, that is, the bottom surface and the side surface via rollers or the like. .

The concrete supply unit 7 may be, for example, a concrete pump car. It goes without saying that the self-propelled type is not always necessary. The method according to claim 2, wherein a step of providing a dolly 3 that moves along the groove portion 1, a step of placing a concrete supply pipe 4 on the dolly 3, a step of installing a mold 5 on the road surface portion 2, The step of arranging the reinforcing bars 6 in the form 5, the step of connecting the concrete supply part 7 to the concrete supply pipe 4, and the placement of the concrete supply part 7 on the support carriage 8 moving along the groove part 1. After the concrete is poured from the concrete supply unit 7 to the formwork 5, the dolly 3 and the support dolly 8 are moved to newly install the formwork 5.
To place concrete in order.

Here, the supporting carriage 8 has, for example, an area such that a concrete pump truck can be placed thereon, and like the carriage 3, the inner surface of the groove portion 1, that is, the bottom surface and the side surface are provided with rollers or the like. It can be installed freely.

Although the present invention comprises the above essential components, it goes without saying that the present invention can be realized even if a concrete carrying vehicle such as a concrete mixer is added. Further, in the configuration of claim 3, a trolley 3 moving along the groove 1 is provided, a concrete supply pipe 4 is placed on the trolley 3, and a concrete supply unit 7 is connected to the concrete supply pipe 4, It is configured such that concrete can be supplied while moving the tip of the concrete supply pipe 4 to an arbitrary position.

[0013]

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.

Then, the reinforcing bars 6 are arranged in the mold 5.
The concrete supply pipe 4 is movable by a carriage 3. Therefore, the concrete supply pipe 4 can be arbitrarily moved to any place in the formwork 5. As a result, concrete can be easily placed in the mold 5.

When the first concrete casting on the formwork 5 is completed in this way, the trolley 3 and the support dolly 8 are moved to sequentially place concrete on the newly installed formwork 5. Unlike the above-mentioned conventional method, since the concrete supply pipe 4 does not enter the mold 5, the minimum number of workers is required during the placing work.

[0016]

Embodiments of the present invention will be described with reference to FIGS. First, an apparatus used for carrying out the present invention will be described.

FIG. 1 is a view of the road surface inside the tunnel from above, and a groove portion 1 is provided at the center of the road surface portion 2. As shown in FIGS. 4 and 5, the groove portion 1 has a rectangular cross section, and has a depth of 490 mm and a width of 1000 mm. Drain grooves 1a are formed on both sides of the bottom of the groove 1.

The road surface portion 2 is preliminarily cast with concrete as a foundation, but the present invention is to pour the concrete onto the foundation. A carriage 3 that moves along the groove 1 is provided in the groove 1.
As shown in FIGS. 2 and 3, the carriage 3 is configured by providing a floor frame pulley 3b and a side wall pulley 3c on a tubular frame 3a. The floor pulley 3b is provided with wheels that run on the bottom of the groove 1 while touching the ground, while the sidewall pulley 3c is provided with wheels facing the sidewall 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. Therefore, the wheels provided on both sides of the side wall pulley 3c are not in contact with the side wall at all or only one of them is in contact with the side wall. Further, a first traction lever 3d for pulling the frame 3a is connected to the frame 3a.

A concrete supply pipe 4 is placed on the dolly 3. A clamp 3e is provided on the carriage 3 so as to detachably hold the concrete supply pipe 4. The concrete supply pipe 4
Flexible hose 4a is connected to the base end of
The flexible hose 4a is supported by a flexible hose anti-sway clamp 3f provided upright on the carriage 3.

On the other hand, a flexible hose 4b is provided at the tip of the concrete supply pipe 4, and the concrete is discharged from the tip nozzle 4c. A support carriage 8 is connected to the tip of the first traction lever 3d. The support carriage 8 is for mounting a concrete supply unit 7 such as a concrete pump car, and includes a mounting plate 8a, a floor pulley 8b and a side wall pulley 8d provided on the lower surface of the mounting plate 8a. It is provided. The floor pulley 8b is a wheel 8c that travels while being in contact with the bottom of the groove 1.
On the other hand, the side wall pulley 8d is provided with wheels facing the side wall of the groove portion 1.

1 is provided between the side wall pulley 8d and the side wall of the groove 1.
A clearance of 5 mm is set. A car stop 8e is provided on the upper surface of the mounting plate 8a to prevent the concrete pump car from being inadvertently moved. A second traction lever 8f is connected to one end of the mounting 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 the concrete pump truck can be moved as the tow crawler 8g travels. As described above, since the concrete supply unit 7 is movable, it does not necessarily have to be a self-propelled type such as a concrete pump car. The mounting plate 8a has a width of about 2430 mm and a length of about 7500 mm.

In the above construction, when pouring concrete, first, the form 5 is installed on the road surface portion 2 located on the left and right of the groove portion 1. This formwork 5 is the inner part A of the tunnel.
Install from the side. Then, the reinforcing bars 6 are arranged in the mold 5. This reinforcing bar 6 is a net-shaped member consisting of vertical lines and horizontal lines.

The concrete supply pipe 4 is movable in the F direction indicated by the arrow by the carriage 3. Therefore, the tip nozzle 4c can be arbitrarily moved to any place in the mold 5. As a result, concrete can be easily placed in the mold 5. The concrete mixer 9 supplies concrete to the concrete pump car.

When the first concrete casting on the formwork 5 is completed in this way, the carriage 3 and the support carriage 8 are moved to sequentially place the concrete on the newly installed formwork 5. Unlike the conventional method described above, since the concrete supply pipe 4 does not enter the mold 5, the minimum required number of workers is required during the placing work, and there is no fear that the reinforcing bar 6 will be deformed.
In addition, the connection and disconnection of the concrete supply pipe 4 is not required, and it is possible to greatly reduce the labor.

Furthermore, since the uncast concrete portion or the invert is wide, 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 on the roadbed of long tunnels.

In the above-mentioned embodiment, the one having the supporting carriage 8 is described, but in short, if the concrete supply pipe 4 and the concrete supply portion 7 are integrally moved, the intended purpose can be achieved, so that it is not essential. Absent.

[0027]

EFFECTS OF THE INVENTION According to the present invention, concrete can be discharged to any place, and the concrete supply pipe is located in the unobstructed groove portion. In addition to being able to achieve this, the work efficiency can be greatly improved.

Moreover, there is no risk of deforming the reinforcing bar, and the safety of the worker can be greatly improved.

[Brief description of 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 vertical sectional view of a road surface showing an embodiment of the present invention.

FIG. 6 is a plan view of the construction process showing the embodiment of the present invention.

FIG. 7 is a plan view showing a conventional concrete pouring method.

[Explanation of symbols]

 1 ・ ・ Groove, 2 ・ ・ Road surface, 3 ・ ・ Truck, 4 ・ ・ Concrete supply pipe, 5 ・ ・ Form, 6 ・ ・ Reinforcing bar, 7 ・ ・ Concrete supply, 8 ・ ・ Supporting trolley.

Claims (3)

[Claims] 1. A concrete pouring method in a tunnel for pouring concrete on a road surface portion having a groove portion in the center, in the step of providing a truck moving along the groove portion, and placing a concrete supply pipe on the truck. The step of installing a formwork on the road surface part, the step of disposing a reinforcing bar in the formwork, and the step of connecting a concrete supply part to the concrete supply pipe, from the concrete supply part to the formwork. The concrete pouring method in a tunnel, characterized in that after the concrete pouring is performed, the dolly is moved to sequentially pour concrete into the newly installed formwork. 2. A concrete pouring method in a tunnel for pouring concrete on a road surface portion having a groove portion in the center, in the step of providing a truck moving along the groove portion, and placing a concrete supply pipe on the truck. The step of installing a formwork on the road surface part, the step of arranging a reinforcing bar in the formwork, the step of connecting the concrete supply part to the concrete supply pipe, the concrete supply part is moved along the groove part After placing the concrete from the concrete supply part to the formwork, the dolly and the support dolly are moved to sequentially place concrete on the newly installed formwork. A method for placing concrete in a tunnel characterized by being installed. 3. A concrete pouring device in a tunnel for pouring concrete on a road surface portion having a groove portion in the center, wherein a truck moving along the groove portion is provided, and a concrete supply pipe is placed on the truck. A concrete placing device in a tunnel, characterized in that a concrete supplying section is connected to the concrete supplying pipe, and the concrete can be supplied while moving a tip of the concrete supplying pipe to an arbitrary position.