JP2000202814A - Building block for retaining wall and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a building block for a retaining wall at a low cost which has a specific strength and is equipped with a view of nature while voids in which a microbe or the like can live are secured by using a forcedly fractured section of a porous concrete layer as a surface plate part of the building block for the retaining wall. SOLUTION: A PC layer 4 to be formed by casting porous concrete(PC) into a middle part in a molding tool, is formed integrally with normal concrete layers 5a, 5b by casting the normal concrete simultaneously on both its sides so as to be sandwiched between them prior to solidification. A linear notch S is formed on an outer periphery of the PC layer 4 being an intermediate part of the formed monolithic block B, and the PC layer 4 is focedly divided by breaking by allowing tips of cutters C1, C2, C3 to abut against that from all directions. Since a dividedly fractured section is formed as a surface plate part and made a surface, the hole is not blocked. Thereby, a view of nature is obtained wherein a rear surface is a concrete layer 5 having a strength and the front surface plate part is a naturally fractured section unnecessitating the molding tool. Further a manufacturing cost can be reduced, and a microbe is enabled to live.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall building block in which a surface slab is formed of porous concrete and vegetation can be formed on the surface slab, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, in general, a seawall 01 or the like is used for a retaining wall stack block 0 having a smooth surface H and formed of white concrete.
2 (smart block) is used.

However, in recent years, when rivers have been improved by stacking the blocks in such a manner, vegetation such as plants cannot be made due to the smooth surface of the rivers. There is a problem that the natural environment is destroyed without getting there.

[0004] Therefore, in order to restore the conventional natural environment, for example, the surface of the piled concrete is buried by covering soil to vegetate plants, or microorganisms are inhabited by using porous water-absorbing porous concrete. The revetment work which piled up various blocks is being performed.

[0005] However, in such a seawall buried by soil covering or a seawall by stacking blocks formed of porous concrete, there is a problem that, for example, a flooded portion where a river is largely bent and a flow is steep causes the earth covered portion to be washed away. In addition, porous concrete blocks have a problem that they are easily collapsed due to low strength.

In order to allow microorganisms to inhabit, it is necessary to form a large number of voids, and there has been a demand for a revetment block which has a suitable strength and can provide a surface layer having a large porosity.

Japanese Unexamined Patent Publication No. 10-131215 has been proposed as a retaining wall product block that solves such a problem. The retaining wall block has a porous concrete layer having continuous fine voids in the surface slab of the block, and the lower side of the surface slab is formed of ordinary concrete as a single retaining wall block.

[0008]

However, in such a retaining wall product block, since the surface slab is formed into a substantially rectangular flat plate having an uneven shape simulating the shape of natural stone, Since the top is artificially shaped, the surface slab does not have a natural view, and a mold for forming a complex uneven shape simulating the shape of natural stone on the surface slab is manufactured. However, there is a problem that the cost is high.

The present invention has been made in view of such problems, and provides a surface plate with a natural appearance and a porosity in which microorganisms can inhabit while ensuring a predetermined strength. It is another object of the present invention to provide a retaining wall product block that can be produced at a relatively low price and a method of manufacturing the same.

[0010]

In order to achieve the above-mentioned object, a retaining block for a retaining wall according to the present invention comprises a porous porous concrete layer having a large number of fine voids in a surface slab and a rear side of the surface slab. A high-strength concrete layer positioned on the side, forcibly breaking the porous porous concrete layer, and using the fractured surface as a surface slab of the retaining wall stack. It is characterized by being formed as described above. According to this feature, since the surface slab is formed as a natural fracture surface by the porous porous concrete layer, a natural view can be obtained when the surface slab is stacked for revetment, and microorganisms and the like inhabit this portion. Can be done.

In the retaining block for a retaining wall according to the present invention, it is preferable that the surface slab is formed of a mixed layer composed of a porous porous concrete layer formed on a surface layer and a high strength concrete layer on the back side. It is. By doing so, since the back side of the front slab is formed of a mixed layer with a high-strength concrete layer, a fluid such as water entering from the porous porous concrete layer is prevented from passing therethrough.

The method for manufacturing a retaining block for a retaining wall according to the present invention comprises:
A method for manufacturing a retaining block for a retaining wall comprising a porous porous concrete layer having a large number of fine voids in a surface slab portion and a high-strength concrete layer located on the rear side of the surface slab portion. A porous concrete layer made of porous concrete is formed, and a high-strength concrete layer is integrally formed on both sides of the porous concrete layer so as to sandwich the porous concrete layer. It is characterized in that a wall product block is formed. According to this feature,
When the porous concrete layer is forcibly fractured and split, the surface slab becomes a fractured surface and a natural view is obtained, which not only eliminates the need for a mold for forming the surface slab, but also the porous concrete layer in the middle part Is divided at the same time, a pair of retaining wall product blocks are formed at the same time, so that the manufacturing cost can be reduced.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, FIG. 1 is a perspective view of a retaining wall product block as one embodiment of the present invention,
FIG. 2 is a cross-sectional view of the revetment with the retaining wall stacking blocks stacked as the revetment of the river of the present invention.

As shown in FIG. 1, reference numeral 1 designates a retaining block, which is provided with a porous porous concrete layer 2 having a large number of fine voids in a surface slab. The rear side of the surface slab is formed of the ordinary concrete layer 3.

In the retaining wall product block 1, at least the surface slab is formed as a fractured surface.

[0016] Retaining wall product block 1 constructed as described above.
As shown in FIG. 2, when stacked as a bank of a river, the surface slab composed of the porous concrete layer 2 is formed on the broken surface, so that a natural view can be obtained, and at the same time, the surface slab can be formed on the surface slab. Micro-organisms such as aquatic organisms can be inhabited in the formed void.

Further, as shown in FIG. 1, the retaining wall product block 1 has curved concave portions formed on both middle sides of the rectangular parallelepiped, and the surface slab has a porous porous concrete layer 2 and the back side has strength. It is formed of a mixed layer composed of a concrete layer 3 having a high density.

[0018] Retaining wall product block 1 constructed as described above.
According to the above, the surface slab is made of a porous porous concrete layer 2
And the back side thereof is formed of a mixed layer with the high-strength concrete layer 3, so that the passage of fluid such as water from the porous porous concrete layer 2 can be prevented. When pouring concrete is poured into the concave portion behind the surface slab, the penetration of the cement paste or mortar into the pores of the porous can be prevented, and the clogging of the pores can be prevented.

Next, a method for manufacturing the retaining wall product block of the present invention will be described. That is, FIG. 3 is a molding view of a block in which a high-strength concrete layer is integrally formed on both sides of a porous concrete layer so as to sandwich the porous concrete layer. FIG. It is.

First, a porous concrete layer 4 is formed by pouring porous concrete into an intermediate portion of a molding die (not shown), and ordinary concrete is simultaneously poured into both sides of the porous concrete layer 4 while the porous concrete layer 4 is not solidified. It is integrally formed with the concrete layers 5a and 5b.

This molding procedure may be reversed. First, ordinary concrete is poured into both ends of the mold to form high-strength concrete layers 5a and 5b. The porous concrete layer 4 may be formed by pouring concrete.

The integrated block B thus formed
Is formed, for example, a linear notch S on the outer periphery of the porous concrete layer 4 serving as an intermediate portion, and the ends of the cutters C1, C2, C3 (only three positions are shown here) are protruded from the four sides of the notch S. By applying, the porous concrete layer 4 is forcibly broken and divided.

As a result, when the integral block B is forcibly broken and divided from the porous concrete layer, two blocks B as shown in FIG.
1 and B2 are formed.

Since the divided surface is formed as a surface slab which is forcibly broken, a natural view can be obtained. Further, when the porous concrete layer is manufactured using a mold or the like, there is a possibility that a porous hole on a surface where the mold and the porous concrete are in contact with each other may be blocked, and a sufficient hole cannot be obtained. The surface does not block the holes.

In this way, since the surface slab is formed as a natural fractured surface by the porous porous concrete layer 2, a natural view can be obtained when the surface slab is piled up for revetment. Can inhabit microorganisms.

Further, when the porous concrete layer 2 is forcibly fractured and divided, the surface slab becomes a fractured surface to obtain a natural view, thereby not only making a molding die unnecessary for forming the surface slab, When the porous concrete layer 2 is broken and divided from the notch line portion S, a pair of retaining wall building blocks B is formed.
Since B1 and B2 are formed at the same time, the manufacturing cost can be reduced.

The embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention. Included in the invention.

[0028]

The present invention has the following effects.

(A) According to the first aspect of the present invention, since the surface slab is formed as a naturally fractured surface by the porous porous concrete layer, a natural view can be obtained when the surface slab is piled up for revetment. Microbes can inhabit this part.

(B) According to the second aspect of the present invention, since the back side of the front slab is formed of a mixed layer with a high-strength concrete layer, fluid such as water penetrating from the porous porous concrete layer is prevented. Here the passage is blocked.

(C) According to the third aspect of the present invention, when the porous concrete layer is forcibly fractured and divided, the surface slab becomes a fractured surface and a natural view is obtained. Not only is the molding die unnecessary, but also if the porous concrete layer in the middle part is broken and divided, a pair of retaining wall blocks are formed at the same time, so that the manufacturing cost can be reduced.

[0032]

[Brief description of the drawings]

FIG. 1 is a perspective view of a retaining wall product block as one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a seawall by a retaining wall stacking block stacked as a seawall of a river according to the present invention.

FIG. 3 is a molding view of a block in which a high-strength concrete layer is integrally formed on both sides of a porous concrete layer so as to sandwich the porous concrete layer.

FIG. 4 is an explanatory view of an operation showing a state in which an integrally molded block is divided and broken.

FIG. 5 is a perspective view of a conventional retaining wall product block.

FIG. 6 is a cross-sectional view of a seawall with a conventional retaining wall stacking block stacked as a seawall of a river.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retaining wall building block 2 Porous concrete layer 3 Ordinary concrete layer 4 Porous concrete layer 5a, 5b Ordinary concrete layer B1, B2 Block C1, C2, C3 Cutter S Notch

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D018 EA04 2D044 DB53 2D048 AA23 4G052 AB30 AB42 AB51 4G055 AA01 AB00 AC05 BB05 BB18

Claims (3)

[Claims] 1. A retaining wall product block comprising a porous porous concrete layer having a large number of fine voids in a surface slab portion and a high-strength concrete layer located on a rear side of the surface slab portion, Forcibly break the porous porous concrete layer,
A retaining wall product block formed by using the fractured surface as a surface slab of the retaining wall product block. 2. The retaining wall stack according to claim 1, wherein the surface slab is formed of a mixed layer of a porous porous concrete layer formed on a surface layer portion and a high strength concrete layer on the back side. block. 3. A method for manufacturing a retaining block for a retaining wall, comprising a porous porous concrete layer having a large number of fine voids in a surface slab portion and a high-strength concrete layer located on the rear side of the surface slab portion. Forming a porous concrete layer made of porous concrete at an intermediate portion, integrally forming a high-strength concrete layer on both sides of the porous concrete layer so as to sandwich the porous concrete layer, and forcibly breaking and dividing the porous concrete layer. Forming a pair of retaining wall product blocks by using the method.