JPH0128170B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention [Field of Industrial Application] This invention relates to a concrete block used for a retaining wall, and particularly relates to a so-called green retaining wall concrete block used for greening a slope. .

[Conventional technology]

Regarding this type of green retaining wall, it is known that a retaining wall is constructed by masonry of concrete blocks having a green shelf extending diagonally forward (Jettsu Kaisho).
52-11804, Utility Model Application Publication No. 52-83407, etc.).

However, with these known technologies,
Concrete blocks stacked one above the other are only connected by fitting the uneven parts on the top and bottom surfaces of each concrete block, but the connection cannot be strong and there is a large back earth pressure. In such a case, the concavo-convex portions will easily become unfitted.

Therefore, the retaining wall collapses and there is a safety problem.

[Problem that the invention seeks to solve]

In view of the above-mentioned circumstances, an object of the present invention is to provide a concrete block for a green retaining wall that is capable of strengthening the bonding force between the blocks stacked one above the other in a concrete block having a green shelf. (technical means).

B. Structure of the invention [Means for solving the problem] In order to achieve the above object, the concrete block of the present invention adopts the following structure (technical means).
That is, the two side walls 1 facing each other,
It is fixed at the bottom via a bottom plate 2 that slopes upward toward the front, and the bottom plate 2 has a greening shelf 5 extending substantially linearly forward of the side wall 1 and projecting laterally. forming the side wall 1
A back wall 3 is constructed at the rear end, and a space surrounded by the two side walls 1, the bottom plate 2, and the back wall 3 forms an earth and sand filling chamber I, and the greening shelf 5 is placed between adjacent blocks. It is characterized in that the blocks are arranged in contact with the greening shelf 5, and a filling space J for filling concrete is formed between the side walls 1 of the adjacent blocks.

[Effect]

In constructing a retaining wall using these concrete blocks, the concrete blocks are arranged laterally adjacent to each other on the greening shelves 5. 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 concrete filling spaces between the concrete blocks are filled with concrete. Further, the bottom plate is filled with earth and sand, that is, vegetation soil, up to the greening shelf.

〔Example〕

Embodiments of the hollow concrete block of the present invention will be described based on the drawings.

[First Example] Figures 1 to 3 are examples (first example).
shows. That is, FIG. 1 is a plan view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a sectional view thereof.

This hollow concrete block H has opposite side walls 1, 1 fixed at the bottom via a bottom plate 2 which slopes upward as it reaches the front, and fixed via a back wall 3 at the rear end. A so-called box portion that opens forward and upward is formed.
The internal space of this box portion forms the earth and sand filling chamber I.
A wall 4 projecting outward is formed at the front of these side walls 1, and the bottom plate 2 extends forward to form a wide greening shelf 5.

Among these members, the side wall 1, the bottom plate 2, the back wall 3, the overhanging wall 4, and the greening shelf 5 constitute the frame part,
Maintain sufficient strength.

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

The side wall 1 has a so-called rectangular shape in which the upper and lower sides 1a and 1b are horizontal and the front and rear sides 1c and 1d are vertical. In this embodiment, the side walls 1 are arranged opposite each other so as to open toward the front. Further, a recess 10 is formed on the upper side 1a, and a protrusion 11 that fits into the recess 10 is formed on the lower side 1b. A vertical groove 12 is formed near the rear of the outer surface of the side wall 1, and a form plate to be described later is fitted into the groove 12. Further, a drainage opening 13 is provided behind the groove 12 to supply water from the ground when constructed as a retaining wall. Note that the recess 10, the protrusion 11, and the groove 12 described above can be omitted as appropriate, and the opening 13 can be provided on one side wall or omitted.

In this embodiment, the bottom plate 2 has a side wall 1 at the bottom.
It is formed to protrude from the lower side 1b of. In this case, it goes without saying that care must be taken to ensure that the wall thickness is not insufficient. An opening 15 is formed in the bottom plate 2, if desired, for communicating moisture with the block H below. The opening 15 is also used for suspending the block H when it is lifted up, and buried reinforcing bars 16 protruding from the opening 15 are arranged as necessary. In addition,
The openings 15 can have any suitable shape, can be arranged in any number, and can be omitted.

An appropriate number of distribution reinforcing bars 17 are further embedded in the bottom plate 2, and their ends protrude outward from the side wall 1.

The back wall 3 is provided at the rear end of the side wall 1 at the same height as the side wall 1, and extends along the rear side 1d of the side wall 1.
They are on the same page. In addition, an opening 19 is provided in the back wall 3.
is provided. The opening 19 is formed in a tapered shape that widens toward the back, but this is for demolding the mold and is not essential. back wall 3
The lower end of the bottom plate 2 forms a step with the rear end of the bottom plate 2, and the engaging portion 20
form.

The overhanging wall 4 is extended outward along the front side surface 1c of the side wall 1, and its side end surface 4a abuts the front overhanging wall 4 of another adjacent block H.

The greening shelf 5 extends linearly from the bottom plate 2 and is formed to have the same width as the overhanging wall 4. Therefore, the adjacent blocks come into contact with each other at their side end surfaces 5a together with the overhanging wall 4.

Figure 4 shows the state in which concrete blocks H are laid out horizontally.

According to this masonry drawing, the greening shelves 5 are continuous in the horizontal direction, and between the adjacent blocks H, there is a formwork fitted between the side wall 1 and the overhanging wall 4, and further between the groove 12. A body storage space J is formed with the plate 22. A distribution reinforcing bar 17 is provided in a protruding manner in the body storage space J, and a vertical reinforcing bar 23 is arranged in the vertical direction so as to be perpendicular to the distribution reinforcing bar 17.

Figure 5 shows the vertical cross-sectional structure of a retaining wall constructed using this concrete block H.

The construction method of this concrete block retaining wall will be explained below according to the construction procedure.

(1) A foundation is dug into the ground E at the foot of the slope on which the retaining wall will be constructed, foundation stones 25 are installed, and foundation concrete 27 with the upper surface 26 inclined backward is poured on top of it.

Anchor reinforcing bars 28 projecting from the foundation concrete 27 are planted at positions corresponding to the body-embedding spaces J between the blocks H stacked thereon.

(2) After the foundation concrete 27 is solidified, a first stage concrete block H (this is called a foundation block) is placed on the upper surface 26 of the foundation concrete 27.
are laid out horizontally so that their overhanging walls 4 are in contact with each other. In this embodiment, the base block H has a flat bottom surface of the bottom plate 2, and a drain hole 30 communicating with the opening is formed, but it goes without saying that a normal block H may be used. .

The grooves 12 are formed between the concrete blocks H arranged in this manner.
A formwork plate 22 is fitted and installed in the formwork plate 2, and a body-fitting space J is secured between the projecting wall 4 and the formwork plate 22. Further, vertical reinforcing bars 23 are installed in the body-embedding space J to connect to the anchor reinforcing bars 28.

Then, concrete 31 (this is referred to as casing concrete) is placed in this casing space J. By fixing the concrete 31, the horizontally adjacent blocks H are firmly connected to each other.

(3) 2nd to 3rd block H on top of basic block H
are placed in the same phase. At this time, the engaging portion 20 of the bottom plate 2 of the upper block H is fitted between the side walls 1 of the lower block H, thereby facilitating positioning. The form board 22 is installed in the same manner as described above, and the concrete 31 is poured.

Also, the space between block H and ground E is filled with backfill soil.

(4) In this way, the upper block H is further stacked, and the concrete 3
1 and complete the retaining wall.

(5) Sediment, that is, vegetation soil 3, from the front of block H, that is, the greening shelf 5, to the earth and sand filling chamber I inside the block.
3 and perform tamping. The vegetation soil 33 is piled up to the front of the greening shelf 5, and the vegetation surface 3
Trees will be planted in 3a.

Incidentally, this earth and sand filling work is easily performed because the greening shelf 5 is linear and the entire block is in a raised state.

In the above process, concrete block H
It is a design matter that can be done as appropriate to stack up the concrete 31 in two or three or more layers. In this case, the upper and lower concrete blocks H are mutually connected to the uneven portions 10 and 11 of the side wall 1.
The engagement between the rear wall 3 and the engagement portion 20 of the bottom plate 2 stably maintains the inclined posture of the retaining wall.

In addition, if the ground E is bent in the horizontal direction, the concrete blocks H arranged in the horizontal direction
A fan-shaped gap will be formed between the greening shelves 5, but in this case, a formwork board is attached to the lower surface of the greening shelves 5 in the gap, and mortar is filled in the gap. . For this reason, grooves for joints are formed in the side wall portion of the greening shelf 5.

Since the concrete block retaining wall of this embodiment is constructed as described above, a reinforcing beam is formed in the vertical direction by the concrete body 31 and the distribution reinforcing bars 17 and vertical reinforcing bars 23.
A retaining wall with great strength can be obtained. Furthermore, the vegetation soil 33 filled in each block H has a large dead weight as a whole, resulting in a stable retaining wall.

As a block H constituting a retaining wall, the back wall 3 receives the earth pressure of the ground E, and transmits this to the reinforcement beam of the concrete core 31 through the frame.

Moisture and nutrients from the earth E are supplied to the vegetation soil 33 through the window 13 of the side wall 1 and the opening 19 of the back wall 3. Also, the communication of moisture between the upper and lower parts of block H is through opening 1.
It is carried out with 5.

(Second Embodiment) FIG. 6 shows a concrete block according to another embodiment of the present invention. That is, Figure A is a three-dimensional view of the concrete block alone, and Figure B is a diagram showing its horizontally assembled state. In the figures, the same reference numerals are given to the same members as in the previous embodiment.

In this concrete block H1, the intervals between the side walls 1 are wide, the grooves 12 are omitted, and most of the back wall 3A is omitted. The back wall 3A is continuous with the bottom plate 2, but the lower surface of the bottom plate 2 coincides with the lower side of the side wall 1, and does not form the engaging portion 20 in the first embodiment.

In horizontal masonry, adjacent blocks H
A reinforcing bar cage 35 is built in the concrete body space J created by 1, and the concrete body 31
is filled. 36 is a form board for on-site use for the concrete 31.

FIG. 7 shows the construction of a retaining wall using concrete blocks H1. Foundation concrete 27
There is no difference from the previous embodiment in that an anchor reinforcing bar is added and connected to the anchor reinforcing bar cage 35.

This masonry mode shows vertical stacking. Even in this vertically stacked block retaining wall, reinforcement beams are formed by the concrete 31, and the reinforcement beams strongly resist earth pressure, making it possible to obtain a stable retaining wall structure. .

(Other Embodiments) FIGS. 8 to 10 show concrete blocks according to still other embodiments of the present invention. In these embodiments as well, the same reference numerals are given to the same members as in the previous embodiments.

In the block H2 shown in FIG. 8, the side walls 1 are arranged parallel to each other and the overhanging wall 4 is omitted. Openings 13, 19 in side wall 1 and back wall 3
However, the opening 19 has a reverse taper to that of the first embodiment.

During masonry, a form board 38 for on-site use is attached to the rear of the overhanging portion of the greening shelf 5.

Further, another die cut plate is placed opposite to this form plate 38 at a predetermined interval while maintaining a body-filling space, and concrete is poured into the space.

The block H3 shown in FIG.
It is the same as that, but the overhanging wall is omitted and a partition wall 40 is provided at the rear, a vertical beam 41 is provided on the outside of the side wall 1, and the opening 15A is round. Changes have been made in.
42 is a formwork board for on-site use. The partition wall 40 is in contact with the partition wall 40 of the adjacent block H3, and together with the formwork plate 42, forms a body filling space. Vertical beam 4
1 replaces reinforcing reinforcing bar 17 or reinforcing reinforcing bar 1
Work with 7 to ensure adhesion with concrete.

The block H4 shown in FIG. 10 has side walls 1 facing each other so as to open toward the rear, and has an overhanging wall 4 and a partition wall 40, as well as reinforcement across the front of the overhanging wall 4 and the greening shelf 5. A beam 44 is installed.

When the blocks H4 are assembled, a closed space is formed between the overhanging walls 4 and the partition walls 40 of the adjacent blocks H4, so that no formwork is required.

By providing the reinforcing beams 44, the greening shelf 5 can be further extended outward.

The present invention is not limited to the above-mentioned embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention.

C. Effects of the Invention Since the concrete block of the present invention has the above structure and functions, it has the following unique effects.

The retaining wall is integrated in the horizontal and vertical directions by using concrete, making it possible to obtain a retaining wall with great strength.

The greening shelf of the concrete block is linear and there is no bending, making it easier to form the block with concrete, which can reduce manufacturing costs accordingly.

Since the concrete block is installed on the retaining wall with the front part facing upward and the entire structure being raised, it becomes easy to fill with earth and sand from the front part, and the construction efficiency of constructing the retaining wall is improved.

[Brief explanation of drawings]

The drawings show an embodiment of the hollow concrete block of the present invention, FIG. 1 is a plan view of the hollow concrete block of one embodiment, FIG. 2 is a side view thereof,
Fig. 3 is a sectional view taken along the line A--A in Fig. 1, Fig. 4 is a horizontal arrangement view of this block, Fig. 5 is a diagram showing the state of masonry of a retaining wall using this block, and Fig. Figure b is a sectional view taken along the line H--H in Figure 4, Figure 6 shows a hollow concrete block of another embodiment, Figure A is its elevation view, and Figure B is its elevation view. The lateral layout diagram, Figure 7, shows the masonry of the retaining wall.
Cross-sectional view along the Ni-Ni line in Figure b, Figures 8, 9, and 1
Figure 0a is a plan view of a hollow concrete block of another embodiment, and Figure 10b is a diagram of Figure 10a.
FIG. H...Hollow concrete block, I...Earth filling chamber, J...Body filling space, 1...Side wall, 2...Bottom plate, 3...
Back wall, 4... overhanging wall, 5... greening shelf, 5a... side end surface, 40... partition wall.

Claims (1)

[Scope of Claims] 1. Two side walls 1 arranged opposite each other are fixed at the bottom via a bottom plate 2 which slopes upward as it reaches the front, and the bottom plate 2 extends forward from the side wall 1. Forming a greening shelf 5 extending substantially linearly and projecting laterally, a back wall 3 is constructed at the rear end of the side wall 1, and the two side walls 1, the bottom plate 2
A soil filling chamber I is formed by the space surrounded by the back wall 3, and the greening shelves 5 are arranged in contact with the greening shelves 5 of adjacent blocks, and the earth and sand filling chamber I is arranged between the side walls 1 of the adjacent blocks. A hollow concrete block body characterized by forming a hollow space J for filling with concrete. 2. The hollow concrete block body according to claim 1, wherein the front end of the side wall 1 is formed with an outwardly projecting overhanging wall 4 that does not protrude from at least the side end surface 5a of the greening shelf 5. 3. Hollow concrete according to claim 1 or 2, wherein a groove 12 is formed on the outside of the side wall 1 in a vertical direction toward the rear at an appropriate distance from the front end of the side wall 1. Block typeface. 4. The hollow concrete according to claim 1 or 2, wherein the side wall 1 is formed with a partition wall 40 that extends outward toward the rear at an appropriate distance from the front end of the side wall 1. Block typeface. 5. A hollow concrete block body according to any one of claims 1 to 4, wherein the opposing side walls 1 are opposed to each other so as to open toward the front.