JPH11193537A - Construction method of retaining wall making use of concrete block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote the work efficiency of retaining wall construction work making use of concrete blocks. SOLUTION: A rear extension section 18 is extended to an upper part from the lower end of a wall surface constitution section 12 coming into contact with the upper end of the wall surface constitution section 12 provided to the lower stage thereof, and the rear extension section 18 uses a concrete block 10 forming a through-hole 20 in the vertical direction, and the rear of the wall surface constitution section 12 of a lower stage concrete block 10a is filled with backing concrete 28 upto the approximately same height as the upper end of the wall surface constitution section 12. After the solidification of the backing concrete 28, the upper stage concrete block 10 is set on the upper end of the wall surface constitution section 12 of the lower stage concrete block 10a, and the rear of the wall surface constitution section 12 of the upper stage concrete block 10 is filled with the backing concrete 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block and a retaining wall, and more particularly, to a concrete wall and a retaining wall. It relates to a self-supporting concrete block and a retaining wall using the same.

[0002]

2. Description of the Related Art A conventional concrete block and a retaining wall using the same will be described with reference to FIG. The concrete block 102 has a wall-shaped component 104 formed in a plate shape.
And a rear extending portion 106 extending rearward from the back surface of the wall surface forming portion 104. Because it is formed in an L-shape, it can stand alone. The retaining wall 100 is formed by stacking concrete blocks 102 upward along a slope 108. A backfill concrete 112 is provided in a space 110 between the slope 108 and the back surface of the wall component 104.
Are poured and filled, and the concrete block 102 is fixed.

[0003]

However, the above-mentioned conventional concrete block 102 and retaining wall 100 have the following problems. When the retaining wall 100 is formed, after the lower concrete block 102 is installed, the space 11
The backfill concrete 112 is cast in the area 0. afterwards,
The upper concrete block 102 is installed and the space 11
The retaining wall 100 is formed by repeating the operation of placing the backfill concrete 112 in the inside. In this work, when the upper concrete block 102 is installed, the upper surface of the lower backfill concrete 112 layer is
4 must be formed flush with the upper end surface and a horizontal smooth surface.

If the upper surface of the lower backfill concrete layer 112 is not formed to be flush with the upper end surface of the wall surface forming portion 104 and is not formed into a horizontal smooth surface, the upper concrete block 102
There is a gap between the upper concrete block 102 and the lower concrete block 102, and the connection between the upper concrete block 102 and the lower concrete block 102 becomes incomplete. There is also a problem that the upper concrete block 102 is lifted and the inclination angle of the concrete block 102 does not coincide with that of the lower concrete block 102. Therefore, although the problem was solved by precisely finishing the upper surface of the 112-layer backfill concrete, the finishing operation takes a long time, and there is a problem that the work efficiency of the construction work of the retaining wall 100 is reduced. Accordingly, an object of the present invention is to provide a concrete block capable of improving the work efficiency of a retaining wall forming work and a retaining wall using the same.

[0005]

To solve the above-mentioned problems, the present invention has the following arrangement. That is, in a concrete block composed of a plate-shaped wall component and a rear extension extending rearward from the back surface of the wall component, the rear extension has through holes in the vertical direction. It is characterized by being formed. Further, the concrete block may be provided with an angle adjusting means for adjusting a gradient angle of the wall surface constituting portion. The retaining wall according to the present invention is characterized by being formed by laminating the above concrete blocks.

[0006]

[Operation] The operation will be described. When concrete blocks are stacked one on top of the other and filled into the space between the wall part of the upper concrete block and the slope, the backfill concrete is passed through the through-hole and the backfill concrete is passed through the wall of the lower concrete block. Reach the backfill concrete layer that is filled into the space between the component and the slope,
Both backfill concrete layers can be connected. In particular, when the angle adjusting means is provided, it becomes possible to adjust the gradient angle of the wall surface portion of the concrete block regardless of the state of the installation location of the concrete block.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the configuration of the concrete block 10 of the present embodiment will be described with reference to FIGS. FIG.
Is a partially broken side view showing an embodiment of the concrete block 10, and FIG. 2 is a plan view. Numeral 12 denotes a wall component, which is formed of concrete in a plate shape. The surface of the wall component 12 is decorated with natural stone-like decoration by a method described later. On the upper end surface of the wall surface forming portion 12, a connecting convex portion 14 is provided so as to project continuously (may be intermittent) in the width direction. On the other hand, a concave portion 16 in which the convex portion 14a of the lower concrete block 10a can be fitted is provided on the bottom surface of the wall surface forming portion 12.
Are continuously (intermittently) recessed in the width direction. In addition, the cross-sectional shape of the convex portion 14 and the concave portion 16 is formed in a semicircular shape. This is to make it easy to swing in the directions of arrows A and B in order to adjust the inclination angle of the wall surface forming portion 12 of the upper concrete block 10. Further, an (insert) screw for suspending the concrete block 10 or attaching a base metal fitting for a catwalk may be embedded in the upper end surface of the wall surface forming portion 12. Further, as shown in FIG. 2, a connecting projection 15 a is continuously (or may be intermittently) protruded from one side end surface of the wall surface forming portion 12, and the other side of the wall surface forming portion 12. A concave portion 15b into which the convex portion 15a can be fitted is formed continuously (or intermittently) on the end face. Thereby, the concrete blocks 10 can be sequentially and suitably connected in the width direction.

Reference numeral 18 denotes a rear extending portion, and the wall forming portion 12
Extends rearward from the back of the vehicle. The rear extension portion 18
It is formed integrally with the wall surface forming part 12 by concrete. The rear extending portion 18 extends rearward from a portion slightly above the lower end of the wall surface forming portion 12. Rear extension 18
Is extended from a portion slightly above the lower end of the wall forming part 12, so that the angle of inclination of the wall forming part 12 can be adjusted by angle adjusting means described later. In the present embodiment, as shown in FIG. 2, the width of the rear extending portion 18 is formed to be the same as the width of the wall surface forming portion 12. In addition, the shape of the rear extending portion may be set in consideration of the arrangement position of the concrete block on the retaining wall and the like. For example, a portion near the foundation of the sabo dam (lower part of the sabo) may have a longer rearward extension and a shorter one at the upper part of the sabo.

Reference numeral 20 denotes a through hole, which is vertically provided in the rear extending portion 18. The through hole 20 is formed such that the inner diameter at the center in the vertical direction is smaller than the inner diameter at the upper and lower ends, and an undercut portion 22 is formed on the inner peripheral surface. By forming the inner peripheral edge of the through hole 20 in this manner, the concrete block 10 is formed by a mold. However, if the parting surface of the mold is set at the center of the through hole 20 in the vertical direction, the outside of the form Can be easily done. In addition, the filled concrete is
Since the concrete block 10 can be adhered to the inner peripheral edge of the concrete block 10 from above and below, the concrete block 10 can be securely fixed. As shown in FIG. 2, reference numeral 20a denotes a notch, which forms a through hole similar to the above through hole 20 between adjacent concrete blocks 10. By the way, by forming the through hole 20 and the notch 20a in the concrete block 10, in addition to the above effects,
Since its own weight can be reduced, material costs can be reduced, and transport becomes easier.

Reference numeral 24 denotes a bolt as an example of the angle adjusting means, which is screwed into a nut 26 embedded and fixed in the rear extension 18. Lower concrete block 1
Adjusting the amount of protrusion of the bolt 24 with respect to the bottom surface of the rear extending portion 18 in a state where the lower end of the bolt 24 is in contact with the upper surface of the 28-layer backfill concrete layer (the ground in the case of the lowermost concrete block 10). As a result, the wall component 12
Is adjustable. By using the angle adjusting means, the inclination angle can be adjusted by a simple operation even in a rough installation place such as the upper surface of the backfill concrete 28 layer of the lower concrete block 10 (the ground in the case of the lowermost concrete block 10). can do.
Reference numeral 27 denotes a base plate, which receives the tip of the bolt 24 so that the tip of the bolt 24 does not sink into the backfill concrete layer 28 when adjusting the amount of protrusion of the bolt 24. Reference numeral 38 denotes an anchor reinforcing bar, one end of which is buried in the wall surface forming part 12, the other end protrudes toward the side where the backfill concrete layer 28 is cast, and the tip is bent in a key shape. The concrete reinforcing block 38 can securely fix the concrete block 10 to the backing concrete layer 28 without peeling.

Next, referring to FIG. 3, the retaining wall 30 of this embodiment will be described.
The method for forming the film will be described. First, the lower concrete block 10a is set at a predetermined position on the ground 32, and the amount of protrusion of the bolt 24a is adjusted downward to adjust the inclination angle (gradient angle) of the wall component 12a of the concrete block 10a with respect to the ground 32. To the angle. When the installation of the concrete block 10a is completed, the wall component 1
The backfill concrete 28 is cast into the space 36a between the 2a and the slope 34. At this time, a space 36c exists between the bottom surface of the rear extending portion 18a and the ground 32, but the backfill concrete 28 is also filled in the space 36c through the through hole 20a. The backfill concrete 28 is the wall component 1
It is driven and filled to the same height as the upper end of 2a (state in FIG. 3).

When the backfill concrete 28 solidifies, the upper concrete block 10b is laminated on the concrete block 10a. At that time, concrete block 1
The position is determined by fitting the convex portion 14a of Oa and the concave portion 16 of the concrete block 10b. Then, bolt 24
The bottom end of the concrete block 10b is adjusted by adjusting the amount of protrusion of the bolt 24b downward while the lower end of the concrete block 10a is brought into contact with the upper surface of the backfill concrete 28 layer, and the inclination angle (gradient angle) of the wall component 12b of the concrete block 10b is adjusted. The inclination angle (gradient angle) of the constituent part 12a is made to match.

As described above, when the angles match, backfill concrete is poured into the space 36b between the wall surface forming portion 12b and the slope 34. At this time, there is a space 36d between the bottom surface of the rear extending portion 18b and the backfill concrete 28 layer of the lower concrete block 10a, but the backfill concrete passes through the through hole 20b as shown by the arrow C and the space 36d. Also filled inside. In order to prevent the concrete block 10 from being lifted during the filling of the backfill concrete, for example, as shown in FIG. ) May be fixed by welding or the like.

The backfill concrete space 36b, 36d
When it is poured and filled, the upper concrete block 10b is connected to the backfill concrete 28 layer of the lower concrete block 10a and the undercut portion 22 is formed in the through hole 20b. Prevention can be surely prevented, and safety can be improved. In addition, since the upper and lower backfill concretes can be particularly preferably integrated, it is possible to reliably prevent the concrete block 10 from sliding forward (front side) due to the load of the concrete itself. Thus, the retaining wall 30 can be formed by laminating the concrete blocks 10 in a plurality of layers.
At this time, it is not necessary to finish the top of the conventional backfill concrete horizontally and smoothly, and the construction efficiency can be improved. Rather, since the unevenness or aggregates are exposed at the top end of the lower backfill concrete, the adhesion to the upper backfill concrete is improved, and no construction seam occurs, which is good for integration of concrete. Further, the concrete 10 can be sequentially connected in the width direction by using the convex portion 15a and the concave portion 15b shown in FIG. 2, and the retaining wall using the concrete 10 can be extended.

Further, the surface of the concrete block 10 can be subjected to processing for landscape improvement. For example, the surface side of the concrete block 10 is formed in an uneven shape like a surface in which stone materials are arranged by a molding die, and the surface of the concrete block 10 is formed of a granular material made of a hard durable substance such as stone powder or crystal fragments. Is transferred and fixed together with the paint from the mold surface of the mold attached with the paint, so that the surface of the concrete block 10 can be a beautiful outer surface such as a surface on which natural stone materials are stacked. . If the mold surface of the mold is made of silicone rubber, the particulate matter attached by painting can be easily peeled off and transferred to the surface of the concrete block 10.
If the paint is a transparent acrylic paint, the glossy color of the granular material itself can be expressed. In addition, since the concrete block 10 having the outer surface formed as described above can be manufactured in a factory using a molding die, it is possible to more suitably cope with a use application (facility, place), and it is effective.

Next, another embodiment according to the present invention will be described with reference to FIG.
5 and a plan view of FIG. As shown in FIG. 4, a rear extending portion 54 extends at a right angle from the wall surface forming portion 52, and a reinforcing reinforcing bar 56 is embedded as a core material in the entire surface of the concrete block 50 including the inside of the through hole 58 and the notch 58a. Have been. Other configurations are the same as those of the embodiment of FIG. Thus, the surface of the wall surface forming part 52,
The angle at which the surface of the rear extending portion 54 intersects (the gradient angle of the wall surface forming portion 52) can be set according to the intended use. Further, by arranging the reinforcing reinforcing bar 56 so as to be exposed in the through holes 58 and 58a, the concrete block 50 and the backfill concrete can be more completely integrated.

Further, according to the concrete block according to the present invention, it is not limited to forming the retaining wall 30 covering the slope,
As shown in FIG. 6, when the concrete blocks are stacked on both sides and used, the sabo dam 60 can be easily formed. FIG. 6 is a side view of the sabo dam 60. On one side (downstream side) of the ground 61, a concrete block 62 whose surface has been processed for landscape improvement is laminated, and on the other side (upstream side), a slope of a wall surface component is formed. The loose concrete blocks 64 are stacked. This makes it possible to form the downstream side surface 66 with a good view, and to form the upstream side surface 68 having a gradient that receives the pressure of the earth and sand suitably. Reference numeral 70 denotes backfill concrete, and reference numeral 72 denotes a joint of the backfill concrete 70. As described above, various preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments.
For example, the retaining wall 30 can be used not only for the protection of the slope 34 or the sabo dam 60 but also for floor solids, general earth retaining, a wall for scenic landscape, etc., without departing from the spirit of the invention. Of course, many modifications can be made.

[0018]

When the concrete block according to the present invention is used, when the concrete block is vertically stacked, the space between the wall surface component of the upper concrete block and the slope is filled with backfill concrete. The concrete filled via the through hole reaches the backfill concrete layer filled in the space between the wall component of the lower concrete block and the slope, and it becomes possible to connect both backfill concrete layers, Since the process of finishing the upper surface of the lower backfill concrete layer is unnecessary for connecting the two layers, the time required for forming the retaining wall can be reduced, and the working efficiency of forming the retaining wall can be greatly improved. . In particular, when the angle adjusting means is provided, it is possible to easily adjust the inclination angle of the wall component of the concrete block regardless of the state of the installation place of the concrete block. It has a remarkable effect such that the working efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a partially broken side view showing one embodiment of a concrete block according to the present invention.

FIG. 2 is a plan view of the concrete block of the embodiment of FIG.

FIG. 3 is a side sectional view of a retaining wall formed using the concrete block of FIG. 1;

FIG. 4 is a side sectional view showing another embodiment of the concrete block according to the present invention.

FIG. 5 is a plan view of the concrete block of the embodiment of FIG.

FIG. 6 is a side view showing an example of use of the concrete block according to the present invention.

FIG. 7 is a side sectional view of a retaining wall formed by using a conventional concrete block.

[Explanation of symbols]

 10, 10a, 10b Concrete block 12, 12a, 12b Wall component 18, 18, a, 18b Backward extension 20, 20, 20a, 20b Through hole 24, 24a, 24b Bolt 26 Nut 28 Backfill concrete 30 Retaining wall 32 Ground 34 method Surface 36a, 36b, 36c, 36d Space

Claims (3)

[Claims] 1. A wall-shaped component formed in a plate shape, and a rearwardly extending portion extending rearward from the back surface of the wall-shaped component, and at an upper end of the wall-shaped component installed at a lower stage, A height of an upper end of the wall component, which is provided so as to be vertically stacked with the lower end of the wall component being placed, and wherein the rear extension is provided below the height of the bottom surface of the rear extension. In order to form a filling space for backfilling concrete, the upper end of the wall component installed at the lower stage is extended from a portion above the lower end of the wall component contacting the lower portion, and the rear extension is vertically In the method for forming a retaining wall using a concrete block having a through hole formed in a direction, the concrete block is installed in a lower stage, and an upper end of the wall surface portion is provided on the back of the wall surface portion of the lower concrete block. Back up to approximately the same height as After the backfill concrete has solidified, the lower end of the wall component of the concrete block is placed on the upper end of the wall component of the lower concrete block, and the upper concrete block is placed. By filling backfill concrete on the back of the wall component of the upper concrete block, the backfill concrete reaches the lower backfill concrete layer through the through-hole, and both backfill concretes are provided. A method for forming a retaining wall using a concrete block, comprising connecting concrete layers. 2. When the upper concrete block is installed, a connecting projection protruding from an upper end surface of a wall component of the lower concrete block is provided with a wall component of the upper concrete block. 2. The method for forming a retaining wall using a concrete block according to claim 1, wherein a connecting recess formed in the lower surface of the concrete block is fitted. 3. The method for forming a retaining wall using a concrete block according to claim 1, wherein an angle of inclination of the wall surface constituting part is adjusted by an angle adjusting means provided on the rear extending part. .