JP2791744B2 - Retaining wall block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall block, and more particularly to a retaining wall block which facilitates the filling of interlining concrete and has an increased bonding strength between vertically adjacent blocks.

[0002]

2. Description of the Related Art As is well known, a concrete block forms a retaining wall on a slope of a road, a railroad or the like, a slope of a residential land development, or a seawall of a river. This retaining wall is generally laid with a concrete block having an insertion hole, and a reinforcing bar is passed through the insertion hole and filled with filling concrete to be fixed.

[0003]

However, since the insertion holes of the conventional retaining wall block are merely opened in a cylindrical shape, the blocks are stacked to communicate with each of the insertion holes, and the concrete is filled. Even when thrown in from the top of the retaining wall,
The block was clogged on the way and did not sufficiently reach the lower block, or the bonding strength between the vertically adjacent blocks was weak. The present invention has been proposed in view of the above, and an object of the present invention is to provide a retaining wall block capable of reliably filling a filling concrete and obtaining a sufficient bonding force by the filling concrete.

[0004]

SUMMARY OF THE INVENTION To achieve the above object, the present invention relates to a retaining wall block having an insertion hole communicating with an upper end surface and a lower end surface of a block main body. An upper filling portion that has an upper opening end that opens wide and narrows downward toward the inside, and a lower filling portion that has a lower opening end that opens to the lower end surface and narrows upward toward the inside, at least, The upper filling part and the lower filling part are communicated in a straight line in the vertical direction.

[0005]

In the filling portion having a wide opening end provided at the upper and lower ends of the insertion hole and a narrow inside, the effective cross-sectional area of the filling concrete increases, and the vertically adjacent blocks can be firmly connected, and furthermore, the filling becomes possible. When the concrete is filled, the filling portion acts on the upper funnel and the lower funnel, so that the filling concrete can flow down the inside of the insertion hole securely and without gaps.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in the drawings. FIG. 1 is a cross-sectional view of a part of a retaining wall constructed by a retaining wall block according to the present invention, and FIG. It is the front view which omitted some. FIG. 3 is a perspective view of the retaining wall block according to the present invention, FIG. 4 is a partially cutaway front view, and FIG.
6 is a plan view, and FIG. 6 is a sectional view taken along line AA in FIG.

The outline of the retaining wall block 1 according to the present invention is as follows.
A concrete product as shown in FIGS. 3 to 6, comprising a through hole 4 communicating from the upper end surface 2 to the lower end surface 3 of the block main body, and the through hole 4 is vertically straight, The upper end and the lower end are provided with a filling portion 5 whose opening end opening to the end surface 2 or the lower end surface 3 is wide and gradually narrows toward the inside.

The block 1 is, for example, a thick and horizontally long rectangular shape, and has a semicircular upper convex portion 6 extending in the horizontal direction in the middle of the upper end surface 2 in the thickness direction. A semicircular lower concave portion 7 corresponding to the upper convex portion 6 is formed in the lateral direction.
In addition, semicircular vertical grooves 8 are formed on both end surfaces. A substantially central portion in the thickness direction of the block 1 communicates with the upper end surface 2 and the lower end surface 3 of the block 1 in a straight line, and inserts a reinforcing bar and fills with filling concrete. 4 are formed on the left and right. Note that each of the insertion holes 4
Is formed at a position where the center is approximately one-fourth of the lateral width from each side end of the block 1.

According to the embodiment shown in FIG.
The cross section is almost oval. This insertion hole 4
The upper part of the block body is provided with an upper filling portion 5a whose opening end opening to the upper end surface 2 is wide and gradually narrows downward. Below the block main body, there is provided a lower filling portion 5b whose opening end opening to the lower end face 3 is wide and gradually narrows upward in the interior. The upper filling portion 5a and the lower filling portion 5b are linearly formed in the vertical direction by the tapered communication portion 9 that gradually narrows from the upper filling portion 5a to the lower filling portion 5b. Make up. In the illustrated embodiment, the center of the filling portion 5 in the front-rear direction is slightly eccentric to the rear of the center of the communication portion 9 and the inclination of the rear wall of the filling portion 5 is smaller than the inclination of the front wall. ing. The upper convex portion 6 and the lower concave portion 7 are separated by the filling portion 5.

On the front side of the block body, a decorative groove 10 having a natural stone pattern or an artificial pattern may be provided so as to form a decorative surface, or a decorative layer 11 having a roughened surface may be formed. .

The block 1 of the present invention having the above configuration
Is formed by filling a form with concrete. In this manufacturing process, since the upper and lower filling portions 5a and 5b have an inclination that expands toward the upper end surface or the lower end surface, frictional resistance when releasing from the mold is reduced, and the provision is made for forming the insertion hole 4. The core is well removed. In addition, since the space portion of the manufactured block 1 is increased, it is possible to contribute to the weight reduction of the block 1.

Next, a description will be given of a retaining wall 20 constructed using the block 1 of the present invention having the above configuration and a method of constructing the retaining wall.

As a concrete construction method of the retaining wall 20, first, a foundation concrete 23 whose upper surface is leveled is formed on the ground 22 at the lower end of the slope 21. The foundation concrete 23 may be formed by laying the horizontally long concrete block 1 in the horizontal direction, or may be formed by cast-in-place concrete or the like.

A reinforcing bar 24 is erected on the foundation concrete 23 with a predetermined width, and the lowermost block 1 is laid laterally while passing the reinforcing bar 24 through the insertion hole 4. Next, the block 1 to be stacked in the next stage is shifted on the lowermost block 1 by a half in the width direction,
4 are inserted into the respective insertion holes 4 in series and placed. Then, the blocks 1 are sequentially placed on the upper side while being shifted in position by a half in the lateral width direction, and are laid. Block 1
Is placed on the back side of the slab, that is, on the surface of the slope 21.

When the blocks 1 are stacked as described above, the insertion holes 4 of the vertically adjacent blocks 1 communicate with each other in a vertical direction. Then, each of the connected blocks 1
Are filled in the through holes 4 communicating with the filling concrete 26. That is, the thinned concrete 26 is poured under its own weight from the upper filling portion 5a of the uppermost block 1. At this time, the upper and lower ends of the insertion hole 4 of the block 1 according to the present invention have filling portions 5a, 5 expanding upward or downward.
The upper filling portion 5a that expands upward acts as an upward funnel, and the lower filling portion 5b that expands downward acts as a downward funnel. Therefore, when the filling concrete 26 flows down each of the insertion holes 4 which are arranged in a series in the vertical direction, the upper filling portion 5a has an upward funnel shape to guide the filling concrete downward, and the lower filling portion 5b has the lower filling portion 5b. The filling concrete flowing from above is diffused in the horizontal direction and flows down. For this reason, the filling concrete surely flows down the respective insertion holes, and not only the filling concrete 26 can be surely spread to the lower filling portion 5b of the lowermost block 1 but also the respective filling holes. Can be densely filled without gaps. The hollow space formed by the vertical grooves 8 of the blocks 1 adjacent to the left and right is also filled with the filling concrete 27.

As described above, the insertion hole 4 of each block 1
When the filling concrete 26 filled in the space is hardened, the vertically adjacent blocks 1 are connected to each other by the upper filling portions 5a communicating with each other.
And the lower filling portion 5b are connected by the filling concrete 26 filled with the filling. In this case, since the effective cross-sectional area of the filling section 5 constituted by the upper filling section 5a and the lower filling section 5b is large, the bonding force of the filling concrete 26 is increased, and the connection is ensured. Therefore, there is no displacement of each of the blocks 1 laid by the large earth pressure from behind, and the retaining wall 20 does not collapse.

Although the present invention has been described with reference to the embodiment shown in the drawings, the present invention is not limited to the above-described embodiment, and can be appropriately implemented without changing the configuration described in the claims. For example, in the illustrated embodiment, an oval insertion hole is shown, but the shape of this insertion hole may be circular or polygonal.

[0018]

In summary, according to the present invention, there is provided a retaining wall block having an insertion hole communicating with an upper end surface and a lower end surface of a block body, wherein the insertion hole is opened at an upper end surface. An upper filling portion that is wide and narrows downward toward the inside, and a lower filling portion that has a wide lower opening end that opens to the lower end surface and narrows toward the inside upward. The parts are communicated in a straight line in the vertical direction. Therefore, for example, even a large block having a surface area of about 1 m ² becomes significantly lighter due to the space formed by the upper filling portion and the lower filling portion of the insertion hole, and is easy to handle during transportation and construction. Moreover,
When the filling concrete flows down during the construction of the retaining wall, the upper filling part becomes an upward funnel shape, allowing the filling concrete to flow down smoothly without difficulty, and the lower filling part flowing from above. Since the concrete is diffused in the horizontal direction and flows down, there is no clogging in the middle of the concrete and no voids are generated inside the insertion holes, and there is no gap between the filling portions of the insertion holes of each communicating block without gaps. Can be filled. In addition, since the communicating hole has an upward funnel-shaped filling part and a downward funnel-shaped filling part, it becomes extremely quick when filling concrete flows down, and shortens the construction period in the construction of the retaining wall. Can be planned. Furthermore, in the constructed retaining wall, a lower filling portion that opens at the lower end surface of the block located above and a lower filling portion that opens at the upper end surface of the block located below at the boundary between the vertically adjacent blocks. Because the part is polymerized and the filling concrete is filled and hardened, it becomes a thick hump, so the connection between the upper and lower blocks becomes remarkably strong, and it is enough even if strong earth pressure acts from the slope In addition to being able to withstand natural stress, even if natural stress such as an earthquake or a strong wind acts, it is less likely to collapse or be damaged, and a highly reliable retaining wall having a pre-designed strength can be constructed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of a retaining wall using a retaining wall block according to the present invention.

FIG. 2 is a partially cutaway front view of a retaining wall using the retaining wall block according to the present invention.

FIG. 3 is a perspective view of a retaining wall block according to the present invention.

FIG. 4 is a partially cutaway front view of the retaining wall block according to the present invention.

FIG. 5 is a plan view of a retaining wall block according to the present invention.

FIG. 6 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Block 2 Upper end surface 3 Lower end surface 4 Insertion hole 5 Filling part 20 Retaining wall

Claims (1)

(57) [Claims] 1. A retaining wall block having an insertion hole communicating with an upper end surface and a lower end surface of a block main body, wherein the insertion hole is formed such that an upper opening end opening to an upper end surface is wide and downward. An upper filling portion that becomes narrower, and at least a lower filling portion that has a lower opening end that opens to the lower end surface and is wider and narrower toward the inside upward, have the upper filling portion and the lower filling portion straight in the vertical direction. A retaining wall block, which is connected to the building block.