JP3078776B2 - Reinforced soil structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced earth structure such as a retaining wall constructed facing a road or the like, and more particularly to a concrete block as a retaining wall material which is installed at the tip of an embankment to hold the embankment. Or use concrete panels, etc. and install them in the embankment to fix the retaining wall material so that it does not move to the tip of the embankment and use geotextile (a synthetic polymer material Woven fabric, nonwoven fabric, net, etc.).

[0002]

2. Description of the Related Art As shown in FIG. 10, for example, a plurality of wall members 20, such as concrete blocks or concrete panels, are installed vertically and horizontally as a retaining wall constructed facing a road or the like. Meanwhile, wall members
Large amount of earth and sand (fill) discharged on the back side of 20
It is known that the embankment is carefully crushed, and the wall member 20 is fixed in the embankment 21 and the embankment reinforcing material 22 for holding the embankment 21 so as not to flow out is buried in a plurality of layers. .

At this time, a geotextile made of a synthetic resin grit, a synthetic resin sheet, or the like is used as the embankment reinforcing material 22, and the embankment reinforcing material 22 is simply attached to an anchor member protruding from the rear surface of the wall member 20. It is connected by hooking the end or sandwiching it between the upper and lower wall members 20,20.

[0004]

However, this type of geotextile is excellent in flexibility, is easily blended with the embankment, and is easily rolled.
There is a major drawback in that the warp yarn is liable to break at the intersection with the weft before exhibiting sufficient tensile strength at the connection portion with the warp yarn.

In the latter connection method in which the end portion of the embankment reinforcing member 22 is interposed between the upper and lower wall members 20, 20, the end of the embankment reinforcing member 22 is formed by the weight of the wall member 20 and the friction between the upper and lower surfaces. If the friction with the upper and lower wall members 20 is insufficient because the parts are connected, the end of the embankment reinforcing member 22 may easily come off. The end of the embankment reinforcing material 22 is connected to a connection key (not shown) attached for connecting the upper and lower wall members 20, 20 between the upper and lower wall members 20, 20, Further, it is necessary to connect one end of the embankment reinforcing member 22 to the wall member 20 via a mounting bracket (not shown), and there are problems such as high cost of the wall member and unavoidable complication of construction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In particular, the end of a geotextile as an embankment reinforcing material can be easily and reliably connected to a retaining wall material. It is an object of the present invention to provide a reinforced earth structure in which the steel is easily broken.

[0007]

Means for Solving the Problems In order to solve the above problems, a reinforced earth structure according to claim 1 of the present invention comprises:
In particular, an uneven surface portion that meshes with each other is formed on the contact surface portions of the retaining wall materials, and the one end of the embankment reinforcing material is connected between the uneven surface portions.

[0008] The reinforced earth structure according to the second aspect is the first aspect.
In the above description, the upper and lower wall materials are connected to each other via a connection key.

[0009] The reinforced earth structure according to the third aspect is the first aspect.
In the description of or 2, the retaining wall member is formed in a rectangular parallelepiped shape, a substantially groove shape in cross section when viewed from the side, a substantially groove shape in cross section when viewed in plan, or a substantially T shape in cross section.

According to a fourth aspect of the present invention, in the reinforcing soil structure according to the first, second or third aspect, the uneven surface portion is formed to have a substantially corrugated cross section.

According to a fifth aspect of the present invention, in the reinforcing soil structure according to the first, second or third aspect, the uneven surface portion has a substantially semicircular cross section, a substantially trapezoidal cross section, or a substantially rectangular cross section, and a retaining wall material. Is formed to have a concave portion and a convex portion which are continuous in the lateral direction and mesh with each other.

A reinforced earth structure according to a sixth aspect of the present invention is the reinforced earth structure according to the first, second or third aspect, wherein the uneven surface portion has a rectangular parallelepiped shape or a hemispherical shape, and has a plurality of concave and convex portions meshing with each other at a predetermined interval. Formed.

[0013] The reinforced earth structure according to claim 7 is the first embodiment.
In the above-mentioned items 6 to 6, a bar-shaped member is attached to one end of the embankment reinforcing material, and one end of the embankment reinforcing material is connected with the bar-shaped member by sandwiching the embankment between the uneven surface portions.

[0014] The reinforced earth structure according to claim 8 is:
According to the seventh aspect of the present invention, the rod-shaped member is fixed to the uneven surface portion by nailing or screwing, fixing with an adhesive, or solidifying with a filler.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the Invention Fig. 1 (a),
(b), (c), and (d) show an embodiment of the present invention. In the figure, a plurality of wall blocks 1 are installed as retaining wall materials while being connected to each other in the vertical and horizontal directions. . On the back side of the retaining wall A composed of the plurality of wall blocks 1, earth and sand generated in large quantities on site is filled as the embankment 2 while carefully rolling.

Further, the embankment reinforcing material 3 is embedded in a plurality of layers in the embankment 2, and one end 3a of the embankment reinforcing material 3 is connected to the vertically adjacent wall blocks 1, 1 with a predetermined length therebetween. . Thus, a reinforced earth structure is constructed.

The wall block 1 is made of reinforced concrete.
It is formed in a rectangular parallelepiped shape that can stand alone in a stable state as it is. In addition, concave and convex surface portions 1a and 1b that mesh with each other are formed at upper and lower ends of each wall surface block 1, respectively.

The uneven surface portions 1a and 1b are each formed in a substantially corrugated cross section, and are respectively formed continuously in the lateral direction of the wall block 1 (in the lateral direction of the retaining wall A).

Since the uneven surface portions 1a and 1b are formed as described above, the surface area of the uneven surface portions 1a and 1b is increased, so that the uneven surface portions 1a and 1b and one end 3 of the embankment reinforcing material 3 are provided.
a remarkably large frictional area with the a. Therefore, one end 3a of the embankment reinforcing member 3 can be held very easily and securely, and the one end 3a of the embankment reinforcing member 3 easily comes off due to insufficient friction. There is no problem, and the one end 3a of the embankment reinforcing material 3 can be firmly connected.

Further, at the time of construction, one end 3 of the embankment reinforcing material 3 is placed on the uneven surface portion 1a of the wall block 1 located on the lower side.
a, and one end 3a of the embankment reinforcing material 3 is placed on the upper and lower uneven surface portions 1 by placing the upper wall block 1 thereon.
Since the embankment reinforcing material 3 is pulled at the same time as being sandwiched between a and 1b, the embankment reinforcing material 3 can be laid in a tensioned state without slack. It is not pushed out of the retaining wall A by the earth pressure of the embankment 2.

As shown in FIG. 1 (c), the upper and lower wall blocks 1 are connected by inserting a connecting key 5 between the holes 4, 4 formed on both the uneven surfaces 1a and 1b, respectively. One end 3a of the embankment reinforcing material 3 is
b, and hooked on the connection key 5, the one end 3a of the embankment reinforcing material 3 can be more reliably connected.

As shown in FIG. 1 (d), the upper and lower wall blocks 1 are inserted into vertical holes 1c formed vertically through the respective wall blocks 1 from the foundation (not shown). The raised vertical reinforcing bars 13 are connected by being continuously inserted, and the one end 3a of the embankment reinforcing material 3 is sandwiched between the uneven surface portions 1a and 1b. The rigidity of the retaining wall A can be increased by integration, and the one end 3a of the embankment reinforcing material 3 can be more reliably connected.

It is desirable that mortar or concrete be filled after the vertical reinforcing bar 13 is inserted into the vertical hole 1c.

Further, if an uneven pattern such as a mesh pattern or a rhombic pattern is formed on the entire surface of the uneven surface portions 1a and 1b, the frictional resistance with the embankment reinforcing material 3 is further increased, and the embankment reinforcing material 3 The one end 3a can be more reliably connected.

The wall block 1 is usually about 8 to 60 cm in height, about 15 to 80 cm in width, about 15 to 150 cm in depth, considering ease of transportation and workability and workability.
Furthermore, it is desirable that the weight is formed to about 100 kg. Moreover, it is desirable that the joints between the horizontally adjacent wall blocks 1 and 1 are installed so as to be so-called break joints that are not continuous in the vertical direction.

A geotextile made of a synthetic polymer resin grit or a synthetic polymer resin sheet, which can be freely deformed when the embankment 2 is rolled and can be carefully rolled, is used as the embankment reinforcing material 3. Have been. In addition, as long as the embankment reinforcing material 3 has flexibility and is easy to adapt to the embankment 2 and can easily perform the compaction work, a wire mesh, a reinforcing steel grit, or the like having relatively small rigidity can be installed as the embankment reinforcing material 3.

FIGS. 2 (a) to 2 (e) show other examples of the wall surface block 1. Each of them will be described. In FIG. 2 (a), the uneven surface portions 1a and 1b at both upper and lower ends are shown. It has a substantially semicircular cross section and is continuous in the lateral direction of the wall block 1,
2 (b) is formed with a plurality of vertical holes 6c which penetrate vertically to further reduce the weight. ing.

FIG. 2 (c) shows that the concave and convex portions 1a and 1b at the upper and lower ends have a substantially trapezoidal cross section, are continuous in the lateral direction of the wall block 1, and have a convex portion and a concave portion 7a which mesh with each other. 2 (d), the concave and convex portions 1a and 1b at the upper and lower ends are substantially rectangular in cross section and mesh with each other.
a and a plurality of convex portions 8b at predetermined intervals.

FIG. 2 (e) shows an example in which the concave and convex surface portions 1a and 1b at the upper and lower ends have a hemispherical shape, and are formed at predetermined intervals with concave portions 9a and convex portions 9b which mesh with each other. ing.

In any case, by increasing the surface area of the uneven surface portions 1a and 1b as much as possible and increasing the friction area with the one end 3a of the embankment reinforcing material 3, the one end 3a of the embankment reinforcing material 3 is more firmly connected. It is made possible.

FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b)
This shows a case where the upper and lower wall flocks 1 are connected via a connection key 5 so that they do not come up. By doing so, the wall block 1 can be used in the event of an earthquake or the like.
As a result, there is an effect that a gap is formed between the upper and lower wall blocks 1 and 1 so that the one end 3a of the embankment reinforcing material 3 can be prevented from coming off.

FIGS. 3A and 3B show an example in which the upper and lower wall blocks 1 are alternately connected by one connecting key 5 and two connecting keys 5 respectively. Show,
4 (a) and 4 (b) show the upper and lower wall blocks 1.
This is an example in which one is connected by one connection key 5.

In the upper and lower wall blocks 1, a connecting key 5 protruding from the upper end of the lower wall block 1 is inserted into the vertical hole 1c of the upper wall block 1, and mortar, concrete, etc. Are connected by filling with the filler 16 of the above.

At this time, the connecting key 5 may be protruded from the upper end of the wall block 1 from the beginning, or may be protruded on site at the time of construction. The connecting key 5 may be fixed to the vertical hole 1c with a filler 16 such as mortar and protruded, or an insert nut (not shown) may be embedded in the upper end of the wall block 1 in advance, and the insert nut may be inserted into the insert nut. You may screw and protrude.

A connecting key 5 is attached to the lower wall block 1.
A long nut may be protruded, and a fixing nut may be screwed onto the long bolt to connect the upper and lower wall blocks 1 together.

Embodiment 2 of the Invention FIGS. 5 (a) and 5 (b) show another example of the present invention, in which a wall block 1 is formed in a substantially U-shaped cross section which opens to the embankment 2 side when viewed from the side, and has uneven surfaces at both upper and lower ends. 1a and 1b have a substantially trapezoidal cross section, are formed in the lateral direction of the wall surface block 1, and have a concave portion 10a and a convex portion 10b which mesh with each other.

With the wall block 1 formed in this manner, the wall block can be made lighter.

FIGS. 6 (a) and 6 (b) show another example of the present invention, in which the upper and lower wall flock 1 are connected via a connection key 5 so as not to come up. Has the same effect as that shown in FIGS.

The method of projecting the connection key 5 is exactly the same as that shown in FIGS.

Embodiment 3 of the Invention FIGS. 7 (a) and 7 (b) show another example of the present invention. In the example shown in FIG. 7 (a), the wall block 1 has a substantially T-shaped cross section in plan view. The concave and convex surface portions 1a and 1b at both upper and lower ends have a substantially semicircular cross section, are formed in the lateral direction of the wall surface block 1 and have a concave portion 11a and a convex portion 11b which mesh with each other.

7 (b), the wall block 1 is formed in a substantially groove shape in cross section that opens to the embankment 2 side in plan view, and the uneven surface portions 1a and 1b at both upper and lower ends are formed in a cross section. It is formed in a substantially semicircular shape, has a concave portion 11a and a convex portion 11b which are continuous in the lateral direction of the wall surface block 1 and mesh with each other.

Embodiment 4 of the Invention Fig. 8 (a), (b), (c)
Shows another example of the present invention, in which the wall surface block 1 is formed in a rectangular parallelepiped shape, and the uneven surface portions 1a at the upper and lower ends.
And 1b have a substantially rectangular cross section, are continuous in the lateral direction of the wall block 1, and are formed to have a concave portion 12a and a convex portion 12b which mesh with each other. Other configurations are substantially the same as those shown in FIG.

As shown in FIGS. 8 (b) and 8 (c), a rod-like member having a substantially rectangular cross section is attached to one end 3a of the embankment reinforcing material 3.
Attach one end 3a to the embankment reinforcing material 3 by winding the end 3a once or several times (see FIG. 8 (c)), and connect the end 3a of the embankment reinforcing material 3 together with the rod-like member 14 between the uneven surface portions 1a and 1b. By doing so, the one end 3a of the embankment reinforcing member 3 can be more firmly connected.

Further, as shown in FIG. 9 (a), the plate-like member 14 is nailed or screwed to the concave portion of the uneven surface portion 1a with a nail member or a screw member 15, is simply bonded with an adhesive, or As shown in FIG. 9 (b), the filler 16 such as mortar is filled on the rod-shaped member 14 and solidified and fixed.

[0045]

The present invention has the above-described structure,
In particular, an uneven surface portion that meshes with each other is formed on the contact surface portions of the retaining wall materials, and one end of the embankment reinforcing material is connected between the uneven surface portions. Can be connected very easily, and the frictional area between the uneven surface and one end of the embankment reinforcing material becomes extremely large, so that one end of the embankment reinforcing material easily comes off due to insufficient friction. However, there is an effect that one end of the embankment reinforcing material can be securely and firmly connected. In addition, since the contact area of the wall member is small and light, the cost can be reduced by downsizing the wall member.

Further, since the wall member is formed in a substantially groove shape in cross section when viewed from the side, and in a substantially groove shape or substantially T shape in cross section when viewed in plan, the workability can be improved by reducing the weight of the retaining wall material. And so on.

Further, by attaching a rod-shaped member to one end of the embankment reinforcing material and connecting the one end of the embankment reinforcing material together with the rod-shaped member between the uneven surface portions, the embankment reinforcing material can be connected more firmly. is there.

[Brief description of the drawings]

1 (a) is a partial perspective view of a reinforcing soil structure, (b) is a partial perspective view of a wall block and an embankment reinforcing material, (c) is a partial longitudinal sectional view of a reinforcing soil structure, (FIG. d) is a partial perspective view of the reinforced soil structure.

FIGS. 2A to 2E are partial perspective views of a wall surface block.

3 (a) is a partial perspective view of a reinforced soil structure, and FIG. 3 (b) is a perspective view of a wall block.

4 (a) is a partial perspective view of a reinforced soil structure, and FIG. 4 (b) is a perspective view of a wall block.

5 (a) is a partial perspective view of a reinforcing soil structure, and FIG. 5 (b) is a perspective view of a wall block.

FIG. 6 (a) is a partial perspective view of a reinforced soil structure, and FIG. 6 (b) is a perspective view of a wall block.

FIGS. 7A and 7B are perspective views of a wall surface block.

8 (a) and 8 (b) are partial perspective views of a reinforcing soil structure, and FIG. 8 (c) is a partial perspective view of an embankment reinforcing material.

9A and 9B are partial perspective views of upper and lower wall blocks.

FIG. 10 is a longitudinal sectional view showing an example of a conventional reinforcing soil structure.

[Explanation of symbols]

 A Retaining wall 1 Wall block 1a Uneven surface 1b Uneven surface 1c Vertical hole 2 Embankment (earth and sand) 3 Embankment reinforcement (geotextile) 3a One end of embankment reinforcement 4 Vertical hole 5 Linking key 6a Recess 6b Convex 7a Recess 7b Convex 8a Recess Convex part 9a Concave part 9b Convex part 10a Concave part 10b Convex part 11a Concave part 11b Convex part 12a Convex part 12b Convex part 13 Vertical reinforcing bar 14 Bar-shaped member 15 Nail or screw member 16 Filler

Claims (8)

(57) [Claims] Claims: 1. A plurality of retaining wall materials are installed in the vertical and lateral directions, a backfill of a retaining wall made of the retaining wall material is filled with an embankment, and a plurality of embankment reinforcing materials made of geotextile are filled in the embankment. In the reinforced earth structure constructed by installing and connecting one end to the retaining wall material, an abutting surface portion between the retaining wall materials is formed with an uneven surface portion that meshes with each other, and the embankment is interposed between the uneven surface portions. A reinforced soil structure characterized by being connected with one end of a reinforcing material interposed therebetween. 2. The reinforced earth structure according to claim 1, wherein the upper and lower wall materials are connected to each other via a connection key. 3. The retaining wall material is formed in a rectangular parallelepiped shape, a substantially groove shape in cross section when viewed from the side, a substantially groove shape or a substantially T shape in cross section when viewed in plan. The reinforced soil structure as described. 4. The reinforced soil structure according to claim 1, wherein the uneven surface portion is formed in a substantially wave-shaped cross section. 5. The uneven surface portion has a substantially semicircular cross section, a substantially trapezoidal cross section, or a substantially rectangular cross section, and has a convex portion and a concave portion which are continuous in a lateral direction of the retaining wall material. The reinforced earth structure according to claim 1, 2 or 3, wherein: 6. The uneven surface portion according to claim 1, wherein the concave-convex surface portion has a rectangular parallelepiped shape or a hemispherical shape, and is formed with a plurality of concave portions and convex portions meshing with each other at a predetermined interval. Reinforced soil structure. 7. A bar-shaped member is attached to one end of the embankment reinforcing material, and one end of the embankment reinforcing material is connected to the bar-shaped member by sandwiching the embankment reinforcing material between the concave and convex surface portions. The reinforced soil structure according to 4, 5, or 6. 8. The reinforced soil structure according to claim 7, wherein the rod-shaped member is fixed to the uneven surface portion by nailing or screwing, bonding with an adhesive, or solidifying with a filler.