JP4450382B2 - Reinforced cement sheet - Google Patents

Description

  The present invention relates to a technology for strengthening a gutter block used for draining rainwater, snowmelt, and the like that has fallen on a paved road. Furthermore, the present invention relates to a reinforced cement thin plate excellent in anti-slip function and bondability with a block body.

Conventionally, a concrete side groove block having a pair of side walls and an upper wall connecting the side walls is known as a side groove block used for draining rain water, snow melting water, and the like that has fallen on a paved road (Patent Document 1). reference).
The upper wall of the side groove block is usually provided with a lid hole for fitting the lid plate. As the lid plate, for example, a concrete lid plate or a metal lattice lid, so-called grating is used. ing.
Such a gutter block is provided so that it may cross or cross a road, and can drain water on a road actively.

By the way, the conventional side groove block made of concrete is provided with an uneven pattern on the upper wall 1a of the side groove block 1, as shown in FIG. It is often done.
Such a concavo-convex pattern needs to be uneven on the inner surface of the mold at the time of manufacture, and it takes time to process the mold, and the durability of the uneven portion formed on the mold is poor. Therefore, there is a drawback that the life of the entire formwork is shortened.

Further, the side groove block 1 has no problem in strength as a whole because the reinforcing bars are embedded inside, but the upper surface (that is, the surface) can keep only the strength of concrete.
Therefore, when the gutter block 1 is constructed so as to cross the road, there is a drawback that the uneven pattern imparted on the gutter block is quickly worn by passing an automobile or the like.
As a result, the non-slip function is not exhibited, and the design is deteriorated, requiring replacement.
Further, depending on the degree of passage of an automobile or the like, cracks or the like may occur in the upper wall 1a of the side groove block 1. If the upper wall is lost due to this cause, it must be replaced immediately.
JP 2000-336738 A (FIGS. 2 and 3)

  Thus, in order to restore the function as the side groove block 1, it must be replaced with a new side groove block 1, and such a replacement again requires a lot of labor and cost.

  However, in order to compensate for the insufficient strength of the upper surface of the side groove block, a method of embedding an iron plate in a shape so as to surround the lid hole and forming a part of the upper surface of the side groove block is also employed.

However, there is no pattern on the iron plate, and even if a pattern is provided, it differs from the pattern on the side groove block upper surface.
In addition, by having an iron plate, the side groove block itself becomes heavy, and it is not efficient for carrying and construction.

The present invention has been made on the basis of such background technology, and has been made to overcome the above-described problems of the background technology.
That is, an object of the present invention is to provide a reinforced cement thin plate for use in a block that can be easily provided with a concavo-convex pattern on the surface and can be a side groove block having high mechanical strength. .
Moreover, it aims at providing the method of manufacturing the reinforced cement sheet.

  Thus, as a result of earnest research on the background of such problems, the present inventor has attached a reinforcing cement thin plate for reinforcement separately from the surface of the gutter block main body, and the reinforcing cement thin plate. On the other hand, the present invention has been completed based on the finding that it is possible to increase the bonding force to the block body at the same time as the anti-slip function by providing irregularities on one surface and a pattern on the other surface. It is.

That is, the present invention provides (1) a reinforced cement sheet for surface enhancement gutter block, the surface pattern is formed on, and on the back is formed with uneven portions, the uneven portion, the small It exists in a reinforced cement sheet made of gravel .

  Further, the present invention resides in (2) that a middle window is formed.

  Moreover, this invention exists in (3) and thickness being 12-25 mm.

Further, the present invention resides in (4) that the compressive strength is 40 N / mm ² or more.

In addition, as long as the objective of this invention is met, the structure which combined said (1) to ( 4 ) suitably is also employable.

According to the present invention, when the reinforced cement thin plate is provided on the upper surface of the side groove block, the mechanical strength of the side groove block can be improved.
Therefore, wear due to passage of an automobile or the like can be prevented as much as possible, collapse of the uneven pattern as the side groove block can be suppressed, and the life of the side groove block main body can be extended.

Furthermore, the presence of the reinforced cement thin plate eliminates the need for troublesome work such as embedding an iron plate for strengthening as in the prior art, and does not increase the weight, and the upper surface has a side groove with an overall pattern. It becomes the block body.
In addition, rebar embedding is facilitated when the side groove block is formed, and the production efficiency is improved.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
First, a gutter block provided with the reinforced cement thin plate of the present invention is shown.
FIG. 1 shows a gutter block provided with the reinforced cement sheet.
A plurality of the side groove blocks 2 are connected along the longitudinal direction thereof via a connecting screw rod (not shown), and are laid mainly in the crossing direction of the road.

The side groove block 2 includes a concrete block main body 3 having a U-shaped cross section and a reinforced cement thin plate 4 provided on the upper surface of the block main body 3.
The reinforced cement thin plate 4 is formed by a method of temporarily fixing the reinforced cement thin plate 4 in the side groove mold frame when the side groove block 2 is manufactured, and pouring concrete from there, that is, a so-called insert method.
The reinforced cement thin plate 4 will be described later.
A drainage channel 5 is formed in the gutter block 2 along its longitudinal direction, and water flows downstream through the drainage channel.

A pair of water guide long grooves 3b are formed in the side wall 3a of the block body 3 along the longitudinal direction thereof, and the water guide long grooves 3b guide water that has permeated the road.
In addition, a drainage fitting is provided in a part of the plurality of connected side groove blocks so that the water guided from the water guide long groove 3b flows into the drainage channel 5 (for example, Utility Model Registration No. 3047285). See also).
A plurality of rising grooves 3c are formed in the side wall 3a at intervals, and communicated with the water guide long groove 3b.

As described above, by forming the plurality of rising grooves 3c on the side wall 3a, the water collecting ability can be enhanced even if the height of the impermeable concrete is different.
Incidentally, a pair of through holes 3e is formed in the U-shaped surface 3d of the block body 3, and a screw rod is inserted into the through hole 3e, and a nut is screwed from the side of the lid hole 3f for fitting the lid. Thus, the block main bodies 3 are connected to each other.

Next, the reinforced cement thin plate 4 of the present invention provided on the upper surface of the block body 3 will be described.
FIG. 2 shows the reinforced cement thin plate 4, where (A) shows the front side and (B) shows the back side.
On the surface side of the reinforced cement thin plate 4, uneven patterns (for example, a large number of rectangular patterns) are formed.
Since the pattern portion 4a on which this pattern is formed is uneven, for example, it functions as a slipper that prevents slipping even when the pedestrian walks in the rain.
In addition, even if the car runs, it is similarly slippery so that the tire can be gripped accurately.

Since the surface of the reinforced cement thin plate 4 is a portion exposed to the road surface, it is possible to exhibit design by providing a pattern.
Therefore, the aspect of the concavo-convex pattern is determined from the viewpoints of both slip prevention and design properties.
On the other hand, on the back surface side of the reinforced cement thin plate 4, a large number of uneven portions are formed by the uneven portion forming member.
The uneven portion can be made visible by, for example, exposing and embedding a part of small gravel 4c, which is an uneven forming member, on the back side of the reinforced cement thin plate 4 so as to protrude.

FIG. 3 is an enlarged cross-sectional view of a part of the reinforced cement thin plate 4.
The portion of the small gravel 4c that protrudes and is exposed is embedded in the upper surface of the block body 3 that serves as a base to which the reinforced cement thin plate 4 is attached.
Therefore, the reinforced cement thin plate 4 and the block body 3 are fixed by a strong bonding force (for example, a throwing effect).

As the reinforced cement thin plate 4, it is preferable to use a material that is superior in mechanical strength, for example, compressive strength, bending strength, tensile strength, or abrasion resistance, as compared with, for example, general concrete.
An example of a specific material is DUCTAL (registered trademark), which is an inorganic composite material using reactive fine powder and is based on cement, and has particularly excellent wear resistance. It is.
The reinforced cement thin plate 4 using this ductal can suppress the reduction of the pattern portion 4a as much as possible, and can extend the life of the reinforced cement thin plate 4.
As a result, the durability of the upper surface of the block main body 3 provided with the reinforced cement thin plate 4 can be secured at the same time.

Here, the thickness L1 of the reinforced cement thin plate 4 is preferably 12 to 25 mm, while the compressive strength is preferably 40 N / mm ² or more.
When the thickness is less than 12 mm, the unevenness of the uneven pattern on the front surface and the unevenness on the back surface are not well balanced and it is difficult to form them, and so-called “fogging” cannot be sufficiently obtained.
When it is larger than 25 mm, it becomes difficult to handle at the time of insert molding.
Further, if the compressive strength is less than 40 N / mm ^2, it is not possible to exhibit a superior fracture strength as compared with concrete.
In addition, the height L2 of the protruding portion of the concavo-convex portion on the back surface is preferably 5 to 10 mm from the viewpoint of the connectivity with the block body 3.

Further, in the reinforced cement thin plate 4, a middle window 4 b having the same shape is formed in accordance with the lid hole 3 f of the block body 3.
A lid (not shown) is fitted into the lid hole 3f and the middle window 4b, but the uneven pattern provided on the upper surface of the lid and the pattern portion 4a formed on the reinforced cement thin plate 4 are unified. If it has an uneven pattern, the overall design will be excellent.

Next, a method for manufacturing the reinforced cement thin plate 4 will be described.
FIG. 4 is a diagram showing a manufacturing process of the reinforced cement thin plate 4.

First, as shown in FIG. 4 (A), a plate-shaped mold 11 (for example, made of metal) having a pattern imparting portion 11a formed of a large number of rectangular recesses is prepared.
An inner window 11b is formed on the mold 11 and its edge 11c stands up at a certain height in the vertical direction. Similarly, the edge 11d of the mold 11 also stands up.
The height of the edge defines the thickness of the reinforced cement thin plate 4 and forms a wall that does not leak when the reinforced cement is poured.
In addition, in order to make it easy to demold a reinforcement | strengthening cement at a post process on the upper side of the formwork 11, it is normal to apply the mold release agent for cement.

Next, as shown in FIG. 4B, fluid reinforcing cement is poured into the mold 11 and the reinforcing cement is spread so as to have a certain thickness.
In this case, the reinforced cement may be gradually poured from the vicinity of one corner of the mold 11 and spread over the entire mold so as to have a certain thickness.
After the reinforced cement has spread over the entire mold and before the reinforced cement hardens, as shown in FIG. 4 (C), the unevenness forming member, for example, small gravel 4c, is evenly spread on the cement, and FIG. State as shown.

Then, after the reinforced cement is cured and hardened for a certain time, the reinforced cement thin plate 4 is removed from the mold 11 as shown in FIG.
At this time, since the reinforced cement thin plate 4 is thin, it can be easily removed from the back side of the mold 11 with a relatively light force with a plastic hammer or the like.
Thus, the molding of the reinforced cement thin plate 4 is completed.

  As described above, the formed reinforced cement thin plate 4 is integrated with the side groove block 2 at the same time as a finished product.

The side groove block 2 is formed by filling concrete from an upper opening portion of a formwork space (cavity) defined by a bottom plate (not shown), a pair of side plates, and a pair of front and rear plates.
During the molding, the reinforced cement thin plate 4 is temporarily fixed to the bottom of the mold with the uneven surface of the surface facing down, and is reinforced on the upper surface of the side groove block 2 (that is, the block body) by filling with concrete. The cement thin plate 4 is attached so as to be integrated.
The temporary fixing is performed by, for example, pasting and fixing the periphery of the reinforced cement thin plate to a mold with a tape or the like.
By performing this temporary fixing, the positional deviation of the reinforced cement thin plate can be accurately prevented, and the cement paste has an effect of preventing the cement paste from wrapping around the surface of the reinforced cement thin plate, so that a product with high finishing accuracy can be manufactured reliably.

As described above, an uneven portion is formed by the small gravel 4c on the back surface of the reinforced cement thin plate 4. However, since the surface is directed upward, the uneven portion is embedded by pouring concrete, and the anchoring effect is obtained. appear.
As a result, a strong bonding force between the block body and the reinforced cement thin plate 4 can be obtained.
The reinforced cement thin plate 4 is not peeled off from the block body even when the vehicle is violently passed on the road surface.

By the way, the side groove block 2 has reinforcing bars 10 at a certain depth from the surface for reinforcement. This is to maintain a certain distance from the surface in order to prevent corrosion of the reinforcing bars 10 due to moisture. It is a so-called “cover”.
The reinforcing bars 10 are embedded in the side groove block 2 at the same time as molding.

FIG. 5 is a diagram showing a relationship between the side groove mold 12 and the reinforced cement thin plate 4 at the time of molding.
In the present invention, as shown in the figure, by placing the reinforcing bar 10 on the reinforced cement thin plate temporarily fixed to the mold bottom, there is an advantage that a so-called “fogging” is inevitably obtained by the thickness. .
Incidentally, in the past, in order to secure this “covering”, a reinforcing bar covered with a certain thickness of concrete or the like (so-called “spacer”) was used.
The two-dot broken line in the figure shows the outer periphery of the concrete covered with a conventional reinforcing bar for comparison.
Thus, conventionally, it has been necessary to submerge deeply using reinforcing bars covered with “cover” concrete or the like.
However, in the present invention, the presence of the reinforced cement thin plate 4 has an unexpected advantage that the bare reinforcing bar can be used as it is, unlike the conventional case, when the reinforcing bar 10 is embedded. Also became easy and efficient.

Next, an example of construction of the gutter block 2 on the road is shown for reference.
As shown in FIG. 6, the gutter block 2 is embedded in the road 6, and the road 6 is constructed outside the side wall 3 a of the block body 3.
A plurality of reinforcing bars are arranged inside the side groove block 2 (the reinforcing bar 10 described in FIG. 5 is one of them), but is omitted here.
The roadbed 7 is positioned below the water guide long groove 3b, and a water-impermeable pavement 8 is provided on the upper surface side of the roadbed 7 and a water-permeable pavement 9 is further provided thereon.
The upper surface of the impermeable pavement 8 is preferably located at the lower end of the water guide long groove 3b.

On the road 6 in which such a gutter block 2 is laid, rainwater that has fallen on the road penetrates into the water-permeable pavement 9, reaches the upper surface of the water-impermeable pavement 8, travels along the upper surface, and is guided to the gutter block 2. It is burned.
The rainwater guided to the side groove block 2 flows along the water guide long groove 3b and flows into the drainage channel 5 from a water guide hole (not shown) and is drained.
Incidentally, the presence of the water-permeable pavement 9 prevents rainwater from accumulating on the road surface and prevents so-called hydroplaning phenomenon due to light reflection.

[Other Embodiments]
In the above embodiment, the reinforced cement thin plate for reinforcing the surface of the side groove block as shown in FIG. 1 has been described.
However, the reinforced cement thin plate of the present invention can also be applied to the surface reinforcement of another type of side groove block as shown in FIG.
(A) is a bottomed side groove, (B) is a round channel side groove, and (C) is a mass type side groove. The reinforced cement thin plate is formed in a shape corresponding to each surface.
Of course, it is also possible to apply to other side groove blocks.

Although the present invention has been described above, the present invention is not limited to the above-described embodiment, and various other modifications can be made without departing from the essence thereof. .
For example, in the above-described embodiment, the example in which the block main body 3 and the reinforced cement thin plate 4 are combined by forming the uneven portion with the small gravel 4c on the reinforced cement thin plate 4 and pouring the concrete has been described. The method of bonding 3 and the reinforced cement thin plate 4 is not limited to this method.
For example, the side groove block may be manufactured by bonding the block body 3 and the reinforced cement thin plate 4 with an adhesive.
In that case, it is preferable to make the uneven part of the back surface of the reinforced cement thin plate fine.

Moreover, although one Embodiment mentioned above demonstrated the example which formed the uneven | corrugated | grooved part using the small gravel 4c, this invention is not limited to this, What is necessary is just to be able to form an uneven | corrugated | grooved part.
For example, artificial objects such as glass pieces may be scattered, or irregularities may be formed in advance using a pressing die when the reinforced cement thin plate 4 is produced.
In the latter case, the pressing die becomes the unevenness forming member.

  Furthermore, in the above-described embodiment, an example in which ductal is used as the material of the reinforced cement thin plate 4 has been described. However, other reinforced cements are used as long as they have better mechanical strength than the block body 3, particularly compressive strength. You may do it.

FIG. 1 is an explanatory view showing a gutter block according to an embodiment of the present invention. FIG. 2 is an explanatory view showing a reinforced cement thin plate, in which (A) shows the front side and (B) shows the back side. FIG. 3 is an enlarged cross-sectional view of a part of the reinforced cement sheet. FIG. 4 is an explanatory diagram showing a procedure for forming a reinforced cement thin plate. (A) is a formwork, (B) is a state where cement is poured, (C) is a state where small gravel is sown on a part of the cement, and (D) is a state where small gravel is sown on the entire cement. And (E) show a state where the reinforced cement thin plate is removed from the mold. FIG. 5 is a diagram showing a relationship between a mold frame and a reinforced cement thin plate during molding. FIG. 6 is an explanatory view showing a state in which the gutter block is disposed on the road. FIG. 7 is a view showing a reinforced cement thin plate applied to surface strengthening of another type of side groove block, where (A) is a bottomed side groove, (B) is a round waterway side groove, and (C) is a mass type side groove. Show. FIG. 8 is a diagram showing a conventional example in which an uneven pattern is directly provided on the upper wall of the side groove block.

Explanation of symbols

1 side groove block 1a upper wall 2, 2A, 2B, 2C side groove block 3 block main body 3a side wall 3b water guide long groove 3c rising groove 3d U-shaped surface 3e through hole 3f lid hole 3g recessed portion 3h vertically elongated groove 3j recessed portion 3k stepped portion 4 reinforced cement plate 4a Non-slip pattern part 4b Middle window 4c Small gravel 4d Cement board 5 Drainage channel 6 Road 7 Subbase 8 Impervious pavement 9 Permeable pavement 10 Reinforcement 11 Form 11a Pattern part 11b Middle window 11c, 11d Edge 12 Side groove formwork L1 Thickness of reinforced cement sheet
L2 popping height

Claims (4)

A reinforced cement sheet for reinforcing the surface of a gutter block,
A reinforced cement thin plate characterized in that a pattern is formed on the front surface and an uneven portion is formed on the back surface, and the uneven portion is formed of small gravel .   The reinforced cement sheet according to claim 1, wherein an intermediate window is formed.   The reinforced cement sheet according to claim 1, wherein the thickness is 12 to 25 mm. The reinforced cement sheet according to claim 1, wherein the compressive strength is 40 N / mm ² or more.

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