JPS6248015B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a concrete block used for a retaining wall, and more particularly to a so-called green retaining wall concrete block used for greening a slope.

[Prior Art] Concrete retaining walls or block retaining walls are constructed to prevent landslides on sloping land, that is, on slopes, but in both of these, the concrete surface is exposed, resulting in aesthetic problems.

From this point of view, the present applicant has previously proposed
In the publication, we proposed a hollow concrete block for a retaining wall that can be used to plant trees.

This prior art hollow concrete block consists of a front stiff wall and a retaining beam, and by providing a hollow section from the front stiff wall to the rear end of the retaining beam, the retaining wall built by masonry is constructed from the front wall and the retaining beam. Since the backfilling part is connected, trees planted in the earth and sand filled in the hollow part are constantly supplied with water and nutrients, making it possible to green the retaining wall surface.

However, with this prior art, it is difficult to increase the surface of the earth and sand filling the hollow, that is, the vegetation surface, and therefore there is a problem that construction is difficult on slopes with steep inclination angles.

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention provides a sufficient planting surface even on slopes with steep inclination angles, and provides sufficient strength even in retaining wall structures constructed of masonry. The purpose (technical issue) is to provide a concrete block for a green retaining wall that can achieve the desired effect.

[Means for Solving the Problems] In order to achieve the above object, the green retaining wall concrete block of the present invention adopts the following configuration (technical means). That is, the side walls 1, 1, which are substantially quadrilateral and are opposed to each other, are fixed at the bottom via the bottom plate 2, and are fixed at the rear end via the back wall 3. A front overhang wall 4 that overhangs outward is formed at the front of the side wall 1, a rear overhang wall 5 that overhangs outward is formed at the rear of the side wall 1, and the bottom plate 2 extends diagonally upward in the front. It is characterized in that the greening shelf 6 is formed by

[Function] In constructing a retaining wall using this concrete block, the concrete blocks are arranged laterally with respect to each other with at least their front overhanging walls in contact with each other. Also, a concrete block is placed above the lower concrete block with the same phase.

In the concrete block structure constructed in this way, the hollow space (soil filling chamber) surrounded by the side walls of each concrete block is filled with soil, that is, vegetation soil, up to the greening shelf, and the front and rear portions are filled with soil. Unreinforced or reinforced concrete, that is, casing concrete, is poured in the space surrounded by the overhanging wall (copper filling space).

Appropriate trees are then planted on the soil surface, ie, the vegetation surface, of the greening shelf. Incidentally, moisture is supplied to the vegetation soil filled in the earth and sand filling chamber through openings appropriately made in the concrete block.

[Effects] The green retaining wall concrete block of the present invention has the above structure and functions, and therefore has the following unique effects.

By stacking each concrete block and filling the space formed by the front and rear overhanging walls with concrete, a strong retaining wall capable of resisting the earth pressure of the slope is constructed.

Vegetation soil is filled and held in the soil filling chamber between the side walls and the greening shelf, and is closed by the blocks arranged in the horizontal direction, so that not only the soil does not flow out, but also the planting can be arranged freely.

The greening shelf extends outward and provides ample vegetation surface, making it suitable for greening steep slopes.

[Example] An example of the hollow concrete block of the present invention will be described based on the drawings.

1 to 3 show one embodiment thereof. That is, FIG. 1 is an overall perspective view, FIG. 2 is an exploded perspective view before assembly, and FIG. 3 is an assembled plan view.

The hollow concrete block H of this example is
Opposing side walls 1, 1 are fixed at the bottom via the bottom plate 2 and at the rear end via the back surface 3, forming a so-called box portion opening forward and upward. The internal space of this box portion forms an earth and sand filling chamber. A front overhanging wall 4 that overhangs outward is formed at the front of these side walls 1, and a rear overhang wall 5 that overhangs outward is formed at the rear of the side wall 1. extends obliquely upward and forward to form a greening shelf 6.

Among these members, the side wall 1, the bottom plate 2, the back wall 3, the front overhanging wall 4, and the greening shelf 6 constitute a frame and are formed to exhibit sufficient strength.

The configuration of each part will be explained in detail below.

The side wall 1 has horizontal upper and lower sides, and front and rear sides are perpendicular or parallel to each other, forming a so-called rectangle or parallelogram. In the case of a parallelogram, the back wall 3 and the front and rear overhanging walls 4, 5 are formed to match the angles formed by the side sides.
In addition, in the case of a rectangular shape, the back wall 3, front and rear overhanging walls 4, 5 may be formed vertically,
It may be inclined at a predetermined angle. Preferably, the above inclination angle corresponds to the angle of the slope.

The portion of the bottom plate 2 extending forward from the front overhanging wall 4 has the same width as the front overhanging wall 4. The bottom plate 2 is provided with an opening 10 which communicates with the earth and sand filling chamber I of the lower block H, as desired, to ensure communication of moisture between the upper and lower blocks H.

The upper end of the back wall 3 is lower than the upper end of the side wall 1 to form a recess, and forms a window with the bottom plate 2 of the other block H placed above. This window part receives water penetration from the ground on the back. Therefore, if a window (not shown) is provided in the back wall 3 itself instead of this window, this recess can be omitted.

In this embodiment, the front overhang wall 4 and the rear overhang wall 5 extend outward to equal lengths,
These overhanging walls 4 of other adjacent blocks H,
5 to form a hollow space J (hereinafter referred to as "body-filling space"). The filling space J is filled with earth and sand, concrete, etc. when the blocks H are assembled. Further, reinforcing reinforcing bars 12 are exposed from the side wall 1 and the front and rear overhanging walls 4 and 5, respectively, in order to connect with the concrete.
12a is a reinforcing reinforcing bar exposed from the side wall 1, 12b
12c is a reinforcing reinforcing bar from the front overhanging wall 4, and 12c is a reinforcing reinforcing bar from the rear overhanging wall 5. Note that these reinforcing bars 12 may be omitted as appropriate.

A water passage opening 14 is formed in the so-called rear side wall 1a between the rear overhanging wall 5 and the back wall 3.

The greening shelf 6 extends in the inclination direction from the front end of the bottom plate 2, and its width is made equal to the front end of the bottom plate 2 and thus the width of the front overhanging wall 4. Moreover, the height of the greening shelf 6 does not need to be equal to the height of the side wall 1 due to its function, and may be set to an appropriate height. The upper part of the greening shelf 6 and the front overhanging wall 4 are connected by a connecting beam 16 in order to prevent the greening shelf 6 from being damaged by this bending force due to a load higher than expected being applied to the greening shelf 6. . This connecting beam 16 can be omitted when there is no need to consider the bending force.

In producing the concrete block of this example constructed in this way, in addition to being integrally molded using a formwork, there is also a molding method in which it is molded in parts as appropriate, and then these divisions are assembled to form a finished product. taken.

FIG. 2 shows an example of a molding method using such division. In FIG. 2, a front divided body H1 mainly consists of a greening shelf 6 and a front overhanging wall 4, a central divided body H2 mainly consists of a side wall 1 and a bottom plate 2, and a rear side wall 1a and a back wall 3. Rear split body H3 mainly consisting of
These divided bodies are tenon-bonded to each other.

For molding by division, in addition to the above-described method, appropriate means (for example, dividing the side wall 1 from the center to form two bodies) can be used.

Next, the method of assembling the blocks of this embodiment, in other words, the method of constructing the retaining wall, will be explained, and the functions of each component of the blocks will be explained.

FIG. 3 shows a plan view of the masonry, and FIG. 4 shows a longitudinal sectional view of the masonry.

The construction procedure will be explained below.

(1) A foundation is dug into the ground E at the foot of the slope where the retaining wall is to be constructed, a foundation stone 20 is installed, and foundation concrete 22 with a horizontal top surface is poured on top of it.

(2) After the foundation concrete 22 is solidified, the first stage of main concrete blocks H (referred to as foundation blocks) are laid out horizontally on the foundation concrete 22. At this time, the front overhanging wall 4 and the rear overhanging wall 5 of the adjacent foundation blocks H collide with each other to form a body storage space J (see FIG. 3). Concrete (this is referred to as concrete) is poured into this filling space J. By fixing this concrete filling, the connections between the blocks H that are laterally adjacent to each other are strengthened.

In addition, when the rear overhanging wall 5 is shorter than the front overhanging wall 4, field formwork is installed between the rear overhanging walls 5, and concrete is poured into the body.

(3) Place the 2nd and 3rd stage blocks H on the foundation block in the same phase, and pour concrete in the same manner as above. At this time, if the ground E on the back is heaped up and the block is likely to fall on its back, the reinforcing reinforcing bars 12 of the upper and lower blocks should be tied together with smoothed iron wire or the like.

In addition, the gap between the block H and the ground E is filled with backfill soil.

(4) In this way, the upper block H is further assembled, and concrete is poured in the same manner as above to complete the retaining wall.

(5) From the front of block H, that is, the greening shelf 6, to the earth and sand filling wall I in the block
4 is filled, compacted, and trees are planted 26 on the vegetation surface exposed on the greening shelf 6.

The retaining wall completed through the above steps will have reinforcement beams made of concrete placed in the body in the vertical direction, resulting in a retaining wall with great strength. Furthermore,
The vegetation soil filled in each block H has a large weight as a whole, making it a stable retaining wall.

As block H constituting the retaining wall, the back wall 3 and rear overhanging wall 5 receive the earth pressure of the ground E, and transmit this to the above-mentioned reinforced concrete beams through the frame.

Moisture and curing from the ground E are supplied to the vegetated soil through the window in the back wall 3 and the opening 14 in the rear side wall 1a. In addition, communication of moisture between the upper and lower parts of the block H is carried out through an opening 10.

In addition, although the above-mentioned masonry construction is carried out horizontally, the masonry is not limited to this mode, and masonry can also be stacked diagonally.

FIG. 4 shows a diagram of the masonry state of another embodiment of this concrete block. In the figures, the same reference numerals are given to the same members as in the previous embodiment.

A feature of this embodiment is that in the earth and sand filling wall I, a crosspiece 18 is spanned between the side walls 1, 1 at appropriate positions. This crosspiece 18 prevents the upper and lower blocks H from sliding in an arc.

[Brief explanation of the drawing]

The drawings show an embodiment of the hollow concrete block of the present invention; Fig. 1 is a perspective view of one embodiment of the block, Fig. 2 is an exploded perspective view of the block before assembly, and Fig. 3 shows the block. Fig. 4 is a plan view of the assembled blocks, and a longitudinal sectional view of the assembled blocks. FIG. 5 is a longitudinal sectional view of another embodiment of this block. 1...Side wall, 2...Bottom plate, 3...Back wall, 4...
Front overhanging wall, 5... Rear overhanging wall, 6... Greening shelf.

Claims (1)

[Scope of Claims] 1 Side walls 1, 1, which are substantially quadrilateral and are opposed to each other, are fixed at the bottom via a bottom plate 2, and are fixed at the rear end via a back wall 3. A front overhanging wall 4 is formed at the front of the side wall 1, and a rear overhanging wall 5 is formed at the rear of the side wall 1, and the bottom plate 2 is located at the front. A concrete block characterized by extending diagonally upward to form a greening shelf 6. 2. The front and rear sides of the side wall 1 are parallelograms formed on slopes corresponding to the slopes, and the front overhanging wall 4 and the rear overhanging wall 5 are also formed on slopes corresponding to the slopes. The concrete block described in item 1. 3. The front overhanging wall 4, the bottom plate 2 extending forward from the front overhanging wall 4, and the greening shelf 6 have the same width as claimed in either claim 1 or 2. concrete block.