JP2015034386A - Concrete block with improved workability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete block which improves workability of a general concrete block, and which can prevent local settlement of the concrete block, step formation caused by a difference in height between the blocks, and sliding of the concrete block.SOLUTION: Surfaces, on the side in contact with a ground surface, of various types of concrete blocks 10 such as a slope block and a slope frame block are formed as uneven surfaces provided with a protrusion 11 and a groove part 12. These concrete blocks 10 can be structurally installed in such a manner as to be integrated with the ground surface.

Description

The present invention relates to various concrete blocks used in road slopes, retaining wall construction, sidewalk road construction, river revetment construction, and foundation construction of various structures. The present invention relates to a concrete block that improves the workability of the block, improves the stability of various concrete blocks after construction, and further reduces the suction phenomenon of the ground-side soil of the concrete block.

  Interlocking and flat blocks are often used for landscape pavement on roads where general walkways and vehicles pass. When pavement work using such interlocking or flat block is performed, a laying sand method or a mortar method is used.

  The laying sand method is a method in which sand is laid flat on a flat roadbed that has been flattened and compacted, and then flattened on a compacted roadbed. Since this method does not use cement, the construction cost is low and it can be constructed easily, but it has the problem that it is easily affected by unevenness of the roadbed and roadbed and the flow of rainwater. .

  In particular, in the case of the laid sand method, when rainwater penetrates into the laid sand and becomes saturated, the laid sand flows away to the interlocking and the surface side of the flat block (also called the suction phenomenon), and the interlocking and the flat block block and the road. There is a problem that a cavity is formed between the surface of the board and as a result, interlocking, local subsidence of the flat plate block, and a step is generated between the blocks.

  In addition, if a cavity is generated between the interlocking or the flat plate block and the roadbed surface, the supporting force for supporting the interlocking or the flat plate block is reduced, and the interlocking or flat plate block and the roadbed surface acting along the roadbed surface is also reduced. The frictional force also decreases, and there arises a problem that the interlocking and the flat plate block slide along the road surface.

  Such a phenomenon is further promoted when the roadbed surface is inclined or when a load such as a pedestrian or an automobile is repeatedly applied to the interlocking or the flat plate block or a vibration load.

  On the other hand, the mortar method is a method in which mortar is laid on a laying roadbed, and a concrete interlocking or flat block is placed on the mortar and pressed with a plastic hammer or the like. In the mortar construction method, mortar is used as the laying material layer, so the suction phenomenon caused by the separation of sand particles due to the penetration of rainwater is suppressed, and the supporting force of interlocking and flat block, interlocking and flat block It is possible to prevent the friction coefficient between the roadbed and the roadbed from decreasing, and to prevent the generation of a cavity between the interlocking and the flat plate block and the roadbed.

  However, even with this type of mortar construction method, the process of laying the mortar on the laying roadbed is necessary, which increases the construction cost and damages the road surface paved by the landscape by interlocking and flat blocks. In some cases, the cost of repairing becomes expensive.

  In addition, even if either the sanding method or the mortar method is adopted, when laying the interlocking or flat block, lay it smoothly so that no irregularities occur on the outer surface of the interlocking or flat block. However, there is a problem that a great deal of labor is required.

In addition, here, the background technology has been explained by taking the case of pavement work using interlocking or flat block as an example, but what has been explained here also applies to the case of using other concrete blocks. It is.

  The present invention has been made in view of such problems, and is not limited to interlocking and flat blocks, and in general concrete blocks, while improving workability, local settlement of the concrete blocks and level differences between the blocks. It is an object of the present invention to provide a concrete block capable of preventing occurrence and sliding of the concrete block.

In order to solve this problem, in the invention according to the first aspect of the present invention,
In the concrete block, a concrete block having an unevenness on the ground contact surface side of the concrete block was used.

In the invention according to the second aspect of the present invention,
In the concrete block of the invention according to the first aspect of the present invention, the concrete block is a flat block, a tension block, a legal frame block, a joint block, a product block, a root block, a foundation block, a curb block, a gutter block, It was set as the concrete block of the structure which is either an L-type retaining wall block, an environmental block, a culvert, a flat plate block, or an interlocking block.

In the invention according to the third aspect of the present invention,
In the concrete block according to the first or second aspect of the present invention, the concave and convex portions provided on the ground contact surface side of the concrete block constitute a groove portion that communicates with each other, and all of the groove portions are on the side of the concrete block. It was a concrete block with a structure leading to the part.

Furthermore, in the invention according to the fourth aspect of the present invention,
In the concrete block according to any one of the first to third aspects of the present invention, the groove portion is a concrete block configured to extend in at least two directions along the ground contact surface of the concrete block.

  When the concrete block is configured as described above, when the concrete block is installed on the ground or roadbed, the surface of the ground or roadbed is lightly slid along the ground or roadbed surface. Because a part of the material enters the recess (or groove) of the concrete block, the concrete block and the surface material of the ground or roadbed can be easily adapted, and the outer surface of the concrete block can be easily laid out This makes it possible to improve the workability of the concrete block.

  Moreover, even if rainwater permeates into the surface material of the ground or the roadbed by using the concrete block having the above-described configuration, the rainwater can pass through the hollow portion generated in the concave portion (or groove portion) of the concrete block. Therefore, even when residual soil or sand is used as the surface material, rainwater does not enter the surface material of the ground or the roadbed and become saturated, and the surface material of the ground or the roadbed is on the surface side of the concrete block. It is difficult to run away (also called a suction phenomenon). Accordingly, it is possible to suppress local settlement of the concrete block and a step (displacement) occurring between the concrete blocks.

Furthermore, by using the concrete block configured as described above, since the convex portion of the concrete block (or the protruding portion of the groove portion) has digged into the surface material of the ground or roadbed, residual soil or sand is used as the surface material. Even when using, the frictional force between the ground or roadbed and the concrete block is sufficiently maintained. Therefore, it can suppress that a concrete block slides along the ground or a roadbed surface. This effect is particularly remarkable when the ground or road surface is a slope.

Drawing 1 is a figure showing the back side of a concrete block concerning an example of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of the concrete block according to the embodiment of the present invention shown in FIG.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a back side of a concrete block according to an embodiment of the present invention, and FIG. 2 is a diagram showing a cross section of the concrete block according to the embodiment of the present invention shown in FIG.

The concrete block 10 shown in FIGS. 1 and 2 is shown as one embodiment of the present invention, and specifically shows a tension block.
Tension blocks are concrete blocks for civil engineering that are mainly used for slope protection, and are laid on gentle slopes such as rivers, ponds, and roads to prevent weathering, erosion, and collapse of slopes. It is used for.

  A plurality of irregularities 10 are provided on the grounding surface side (also referred to as the back surface side) of the concrete block (tension block) 10. In the concrete block 10 shown in FIGS. 1 and 2, the plurality of concave and convex portions, that is, the protrusions 11 have a quadrangular pyramid shape and are arranged like a grid. And the recessed part is formed between the projection parts. The recess formed between the protrusions constitutes a groove 12 that communicates with each other, and all of the grooves 12 reach the side 13 of the concrete block 10.

  And the several groove part 12 provided in the ground-contact side of the concrete block 10 is extended in two directions of the vertical / horizontal direction (X, Y direction).

  In the above description, the concrete block 10 has been described as an example of a tension block. However, the concrete block 10 is not limited to a tension block, but is a flat block, a legal frame block, an articulation block, a product block. Concrete blocks such as root block, foundation block, curb block, gutter block, L-type retaining wall block, environmental block, culvert, flat block, interlocking block, etc. may be used.

  Such a concrete block 10 can be integrally formed of ordinary concrete, reinforced concrete, foamed concrete, bolus concrete, and other water-permeable concrete, including uneven portions.

In the concrete block 10 shown in FIGS. 1 and 2, the protrusions 11 have been described as having a quadrangular pyramid shape and arranged like a grid, but the present invention is not limited to this.
The shape of the protrusion 11 is not particularly limited, and may be amorphous. Therefore, the arrangement of the protrusions 11 is not limited and may be a random arrangement.

In the concrete block 10 shown in FIGS. 1 and 2, the recess formed between the protrusions constitutes a groove 12 that communicates with each other, and all of the grooves 12 are formed on the side portion 13 of the concrete block 10. However, the present invention is not limited to this.
More preferably, the recess formed between the protrusions constitutes a groove 12 that communicates with each other, but the recesses formed between the protrusions do not communicate with each other independently. It may exist. In this case, the concave portion does not constitute a groove portion, and therefore the groove portion does not reach the side portion 13 of the concrete block 10.

By using the concrete block 10 having the above-described configuration, when the concrete block 10 is installed on the laying ground or the roadbed, the concrete block 10 is lightly slid along the ground surface or the roadbed surface. A part of the surface material of the roadbed enters the concave portion (or groove portion 12) of the concrete block 10.
As a result, the concrete block 10 and the surface material of the ground or the roadbed can be easily adapted, and can easily be laid out so that the outer surface of the concrete block 10 is smooth.
That is, the workability of the concrete block 10 can be greatly improved.

In addition, by using the concrete block 10 configured as described above, even if rainwater penetrates into the ground or road surface material through the gap between adjacent concrete blocks 10 or through the concrete block 10, Since the rainwater can pass through (or stay in) the cavity formed in the recess (or groove) of the concrete block 10, even if residual soil or sand is used as the surface material, the ground or roadbed Rainwater does not enter into the surface material and become saturated, and the surface material of the ground or the roadbed is less likely to flow out (also referred to as a suction phenomenon) to the surface side of the concrete block 10.
Therefore, local settlement of the concrete block 10 and a step (displacement) occurring between the concrete blocks 10 can be suppressed.

Furthermore, when the concrete block 10 having the above-described configuration is laid on the ground or the roadbed, the convex portion of the concrete block 10 (or the protruding portion of the groove portion 12) is bitten into the surface material of the ground or the roadbed. Therefore, even when residual soil or sand is used as the surface material, the frictional force between the ground or the roadbed and the concrete block 10 is sufficiently maintained.
Therefore, the concrete block 10 can be prevented from sliding along the ground or the road surface. This effect is particularly remarkable when the ground or road surface is a slope.

10 Concrete block 11 Protrusion part 12 Groove part 13 Side part

Claims (4)

  A concrete block characterized in that an unevenness is provided on the ground contact surface side of the concrete block.   The concrete block according to claim 1, wherein the concrete block is a flat block, a tension block, a frame block, an articulated block, a product block, a root block, a foundation block, a curb block, a gutter block, and an L-shaped retaining wall. A concrete block characterized by being one of a block, an environmental block, a culvert, a flat block, or an interlocking block. The concrete block according to claim 1 or 2,
A concrete block characterized in that the concave and convex concave portions provided on the ground contact surface side of the concrete block constitute a groove portion communicating with each other, and all of the groove portions reach the side portion of the concrete block. In the concrete block in any one of Claims 1 thru | or 3,
The said groove part is extended along the ground-contact surface of the said concrete block, and is extended and provided in at least 2 directions, The concrete block characterized by the above-mentioned.