JPH06102915B2 - How to place a machine in a waterway - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mechanically placing a waterway, which is applied to, for example, a highway, a general road, a subway waterway, or a runway or a parking lot. .

[0002]

2. Description of the Related Art Conventionally, the construction of a waterway has been done by hand rather than by placing it mechanically. First, the form is continuously assembled and fixed on the base made of concrete. Next, by suspending a cylindrical rubber tube in the formwork at regular intervals (for example, every 1 m or 2 m), the rubber tube is suspended and held in the air, and the reinforcing bars are also suspended in the formwork. Suspend in a floating state. Then, add ready-mixed concrete and keep the rubber tube and rebar suspended until the concrete solidifies,
When the concrete solidified, it was demolded to form a water channel in the structure.

[0003]

[Problems to be Solved by the Invention] The conventional construction has the following problems. First, since the rubber tube is hung at regular intervals (for example, every 1 m or 2 m), it hangs down due to its own weight, or there is a lateral shift, so that the waterway itself inside the structure is wavy. It will be completed in such a state.

Further, since the rubber tube is in a static state until the concrete is solidified, the air released in the process of solidifying the fresh concrete cannot fully escape from the outer periphery of the bottom of the rubber tube, and an air reservoir called a junker is here. Traces were formed.

The poor moldability and poor accuracy of such a water channel naturally have a negative effect on water flow.

Secondly, since the reinforcing bars are also suspended in the form suspended in the form, they are often not accurately suspended at the designed positions. For this reason, the positions of the reinforcing bars in the structure were different, and it was not possible to place the ready-mixed concrete uniformly on the reinforcing bars. As a result, there is a possibility that the strength of the structure and eventually the water channel itself may be reduced.

Thirdly, the work of assembling the formwork on site causes the material of the formwork and the rubber tube to be scattered, which is inefficient and the productivity cannot be improved. Moreover, since pre-work and post-work such as installation of formwork and removal of formwork after solidification of concrete are required, rapid construction could not be performed.

An object of the present invention is to solve the above-mentioned drawbacks, and to provide a method for mechanically driving a waterway capable of improving water flow precision, strength, labor productivity, speediness and workability. And

[0009]

[Means for Solving Problems] In order to achieve the above object,
The present invention is a method for driving a waterway by a machine, in which a base on which a spacer is continuously integrally formed is mechanically driven, and after a rebar assembled in a predetermined shape is placed on the spacer,
A cylindrical mold body is provided inside the molding chamber of the molding mold body, and a mouth is formed on the upper wall to mold and open a drinking mouth along the traveling direction, and the mold body is provided at the lower end of the mouth. There is provided a method for mechanically placing a structure in a machine, in which a structure is mechanically placed by a forming machine provided with a forming frame die provided with a haunch portion formed of an inclined plate connected to.

In this method of mechanically placing a waterway, a dummy is inserted into the mouth of a structure that has been demolded, and the inside of the waterway and the upper surface of the structure are surface-finished with a mortarboard. Is removed, the formwork is a cylindrical body, the haunch part is connected along the tangential direction of the formwork from a position of about 1/4 from the lower end of the mouth part, concrete, etc. It is also characterized in that a distributor made of a triangular pyramid is provided on the upper part of the mold frame located directly below the dropping port of.

[0011]

The method of placing a waterway using the waterway molding form according to the present invention will be described. First, the ground serving as the base floor is compacted and floored. Then, a base on which the spacers are continuously integrally molded is mechanically placed on the base floor. This mechanical pouring is performed while applying vibration to the fresh concrete with a vibrator. Next, the reinforcing bar assembled in a predetermined shape is placed on the spacer. After that, a water channel molding form is provided horizontally on the molding machine, and the structure is continuously machine-punched by the water channel molding frame. This mechanical pouring is performed while applying vibration to the fresh concrete with a vibrator. The poured concrete is molded and demolded in the process of passing through the molding frame as the molding machine moves. A dummy is sandwiched between the drinking mouths of the demolded structure, and the inside of the waterway and the upper surface of the structure are finished with a mortarboard. The dummy will be removed after a predetermined time. In addition,
A stopper made of an iron plate is installed on the end surface of the structure, and it will be removed after the completion of the casting molding.

The above-mentioned molding and demolding are in a mutually contradictory relationship when the upper part of the structure according to the present invention is protruded from the lower part. That is, in order to prevent the upper part from falling after demolding, low slump ready concrete is used and high pressure compaction is required by a vibrator. However, demolding does not proceed smoothly. On the other hand, in order to facilitate the demolding, if high slump ready concrete is used and the compaction is weakened, the upper part will drop after demolding.

However, in the present invention, the raw concrete of low slump is used and the high pressure is compacted by the vibrator. However, since the haunch portion has the inclined structure, the raw concrete is solidified in the process. Releases the dehydrated water-rich toro (composed of water, cement and sand) over the entire waterway surface. In other words, the amount of this toro concentrates at one lower part of the spout, and the slump of concrete in this part is locally raised to prevent the concrete from falling as a result. The force relationship during molding / demolding can be considered as follows. That is, the force P applied to the haunch portion from above due to gravity or internal pressure is decomposed into the frictional force Q between the green concrete and the inclined surface and the force R in the sliding direction of the green concrete, and the frictional force at the time of demolding is reduced. At the same time, since R> Q, the demolding goes smoothly.

In the above work, the mold body for molding the water channel is always provided inside the molding frame body and is moved in parallel with the movement of the molding frame body. There is no gap in the water flow, ensuring accurate water flow.

Moreover, since the mold moves along with the movement of the molding machine, the air floating during the solidification process of concrete does not stay on the lower surface of the mold, that is, the bottom surface of the water channel, and escapes into the air. In addition, during this solidification process, mortar called soot floats along with the air, but since this mortar is rubbed by the mortarboard that continuously moves to the mold after demolding, This will fill the air marks, improve the surface finish, and eventually contribute to the improvement of strength.

Since the molding of the water channel is completed by the movement of the molding machine for pouring concrete, quick construction is possible and labor can be reduced.

Further, in mechanically placing the structure, the spacer integrally formed on the base is continuously mechanically placed, and the reinforcing bar is placed on the spacer. Therefore, the positioning of the reinforcing bar is easy. Yes and accurate. Therefore,
Since the reinforcing bars are incorporated exactly as they were provided in the structure, the concrete acts evenly on the reinforcing bars and improves the strength of the entire structure.

Furthermore, by inserting the dummy immediately after demolding, the upper portions on both sides of the structure are kept in tension until the concrete is solidified through the dummy. The phenomenon of drooping) is further prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method for mechanically placing a waterway according to the present invention will be described in detail with reference to an embodiment shown in the drawings.

The mold body 2 of the waterway mold 1 comprises a side wall 3 and an upper wall 5, and the upper wall 5 is provided with a mouth portion 9 for molding and opening a drinking mouth 7 along the traveling direction. . A molding chamber 11 separated by a side wall 3 and an upper wall 5 of the molding frame body 2.
A tubular mold body 13 is provided inside over substantially the entire length. At the lower end of the mouth portion 9, a haunch portion 15 formed of an inclined plate connected to the mold body 13 is provided. The haunch part 1
5 is a mold frame 1 from a position about 1/4 from the lower end of the mouth 9.
3 is hung along the tangential direction of 3 and connected to the mold body 13. The upper wall 5 of the front part of the molding frame body 2 connected to the hopper 17 is opened and serves as a charging port 19. Hopper 17
An auger 18 for pressurizing fresh concrete is internally provided in. In order to improve the flow of green concrete, a distributor 21 made of a triangular pyramid is provided on the upper part of the mold body 13 located immediately below the dropping port 19.

At the rear part of the molding frame body 2, an upper surface finishing iron 27 for finishing the upper surface 25 of the structure 23 and a waterway finishing iron 31 for finishing the waterway 29 are connected so as to be vertically movable. A protective cylinder 33 for inserting a dummy, which has the same shape as that of the trowel 31 for finishing the water channel, is connected to the rear portion of the trowel 31 for finishing the water channel so as to be vertically movable. Reference numeral 35 is a dummy, and 37 is a molding machine.

In the drawing, the side wall 3 of the molding frame body 2 is shown.
Also, ribs that are appropriately provided on the upper wall 5 are omitted.

Explaining the driving method, first, the ground, which is the base floor, is compacted and the floor is attached. Next, the base 39 is mechanically placed while applying vibration to the fresh concrete by the vibrator 38 by the molding machine 37. A spacer 41 is continuously integrally molded on the base 39. This mechanical pouring is performed while applying vibration to the fresh concrete by the vibrator 38. Next, the rebar 43 assembled in a predetermined shape is placed on the spacer 41. After that, the waterway molding form 1 is installed sideways on the molding machine 37,
The structure 23 is continuously machine-stitched by the waterway molding frame 1. This mechanical pouring is performed while applying vibration to the fresh concrete by the vibrator 38. The poured concrete is molded and demolded in the process of passing through the molding frame as the molding machine 37 moves. The dummy 35 is sandwiched between the drinking mouths 7 of the demolded structure 23, and the inside of the water channel 29 and the upper surface 25 of the structure 23 are surface-finished by the upper surface finishing iron 27 and the water channel finishing iron 31. The dummy 35 is removed after a predetermined time has elapsed. A stopper (not shown) made of an iron plate is installed on the end surface of the structure 23, and is removed after the completion of the casting molding.

The method for mechanically placing a waterway according to this embodiment has the following actions and effects because it has the above configuration. First, in the above-mentioned molding and demolding, the ready-mixed concrete is a low slump, and the vibrator 38 is used for high-pressure compaction. However, since the haunch portion 15 has an inclined structure, the ready-mixed concrete is used. The water-rich Toro component (consisting of water, cement and sand) that is dehydrated in the process of solidification is released to the entire waterway surface. In other words, the amount of this toro concentrates at one lower part of the spout, and the slump of concrete in this part is locally raised to prevent the concrete from falling as a result. The force relationship during molding / demolding can be considered as follows. That is, the force P applied to the haunch portion 15 from above by gravity or internal pressure is decomposed into the frictional force Q between the green concrete and the inclined surface and the sliding direction force R of the green concrete, and the frictional force at the time of demolding is reduced. In addition, since R> Q, demolding proceeds smoothly.

In the above work, the mold body 13 for molding the water channel 29 is always provided inside the molding frame body 2, and is moved in parallel with the movement of the molding frame body 2.
The vertical and horizontal displacements of 9 are not possible, and accurate water passage accuracy is guaranteed.

Moreover, since the mold moves along with the movement of the molding machine 37, the air floating in the process of solidification of concrete does not stay on the lower surface of the mold body 13, that is, the bottom surface of the water channel 29, in the air. Exit to. In addition, in the process of solidification, a mortar component called “air” also floats up along with the air, but this mortar component continuously moves to the mold body 13 after demolding. Since it is rubbed by the iron 31, the deaeration marks are filled, and the surface finish is also good.

Since the molding of the water channel 29 is completed by the movement of the molding machine 37 for pouring concrete, quick construction is possible and labor can be reduced.

Further, when mechanically placing the structure 23,
Since the spacer 41 integrally molded on the base 39 is continuously machine-punched and the reinforcing bar 43 is placed on the spacer 41, the positioning of the reinforcing bar 43 is easy and accurate. Therefore, since the reinforcing bars 43 are built in exactly as provided in the structure 23, the concrete is
3, the strength of the entire structure 23 is improved.

Furthermore, by inserting the dummy 35 immediately after the mold is removed, the upper portions 45 on both sides of the structure 23 are kept in tension until the concrete is solidified through the dummy 35. Is further prevented.

The present invention is not limited to the above embodiment. For example, the cross-sectional shape of the water channel is usually circular as in the above-mentioned embodiment, but it may be other shapes, and therefore the mold body 13 for molding this also has a corresponding cross-sectional shape.

Although the upper surface of the structure is designed to be inclined slightly downward from the horizontal plane (shown by the alternate long and short dash line) (see FIG. 9), the upper wall 5 of the molding frame main body 2 is designed to be substantially horizontal plane due to the settling of concrete. It is desirable to be done. The side wall 3 of the molding frame body 2 is provided perpendicularly to the base as shown in FIG.
Further, as shown in FIG. 9, the base may be inclined and provided,
It can be adapted to the sectional shape of the structure.

The base end position of the haunch portion 15 can be appropriately changed depending on the diameter of the water channel 29. For example, in the case of the illustrated example, since the diameter of the water channel 29 is 200 mm, it is desirable that the proximal end position of the haunch portion 15 is about 1/4 of the lower end of the mouth portion 9, but the diameter of the water channel 29 is 300 mm to 400 m.
In the case of m, the position of about 1/3 is desirable.

[0033]

As described above, according to the method for mechanically driving a water channel according to the present invention, it is possible to drive a high-precision water channel that does not undulate in the vertical and horizontal directions in a good finished state. This has the effect of improving the accuracy of water passage through the waterways. Further, the surface finish is good, and the reinforcing bars are accurately incorporated in the structure, so that the strength of the entire structure is improved. Furthermore, since the molding of the water channel is completed by the movement of the molding machine for pouring the concrete, it is possible to perform a quick construction and reduce the labor.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a water casting mold for machine driving used in a method for mechanically driving a water conduit according to the present invention.

FIG. 2 is a plan view showing an embodiment of a water casting mold for machine driving used in the method for mechanically driving a water channel according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a front view of a molding machine in which a water casting mold for machine driving used in the method for mechanically driving a water conduit of FIG. 1 is installed.

FIG. 7 is a plan view of a molding machine in which a water casting mold for mechanical casting used in the method for mechanically casting a water conduit of FIG. 1 is installed.

8 is a right side view of a molding machine in which a water casting mold for machine driving used in the method for mechanically driving a water conduit of FIG. 1 is installed.

9 is an enlarged cross-sectional view taken along line DD of FIG.

[Explanation of symbols]

 1 Water channel molding form 2 Molding form main body 3 Side wall 5 Upper wall 7 Drinking mouth 7a Drinking mouth lower part 9 Mouth part 11 Molding chamber 13 Formwork body 15 Haunch part 17 Hopper 18 Auger 19 Input port 21 Distributor 23 Structure 25 Top surface 27 Top finishing trowel 29 Water channel 31 Water channel finishing trowel 33 Protective tube 35 Dummy 37 Molding machine 38 Vibrator 39 Base 41 Spacer 43 Reinforcing bar 45 Upper 47 Lower

Claims (5)

[Claims] 1. A method of mechanically driving a water channel, in which a base on which spacers are continuously integrally molded is mechanically driven,
After placing the rebar assembled in a predetermined shape on the spacer, a cylindrical mold body is provided inside the molding chamber of the molding frame body, and a drinking spout is molded on the upper wall along the traveling direction. A structure is mechanically driven by a molding machine in which a molding frame mold having an opening mouth portion and a haunch portion formed of an inclined plate connected to the mold body at the lower end portion of the mouth portion is installed. A method for placing a machine in a waterway, which is characterized in that 2. The method for mechanically placing a waterway according to claim 1, wherein a dummy is sandwiched between the mouths of the demolded structure and the inside of the waterway and the upper surface of the structure are surface-finished with a mortarboard. A method for mechanically placing a waterway in which the dummy is removed after a predetermined time has elapsed. 3. A machine placing method for a water channel according to claim 1 or 2, wherein the form body is a cylindrical body. 4. The method for mechanically driving a water channel according to any one of claims 1 to 3, wherein the haunch portion is connected along the tangential direction of the mold body at a position of about 1/4 from the lower end of the mouth portion. A method for placing a machine in a waterway, which is characterized in that 5. The method for mechanically placing a waterway according to any one of claims 1 to 4, wherein a distributor made of a triangular pyramid is provided on an upper portion of the form body located immediately below a dropping port for concrete or the like. A characteristic method for placing a machine in a waterway.