JP3098728B2 - Embankment reinforcement fixing metal fittings and reinforcement soil structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an embankment reinforcing member fixing metal fitting which is attached to an embankment reinforcing material for fixing a wall panel to a tip portion of an embankment to prevent the embankment reinforcing material from being pulled out, and uses the embankment reinforcing material fixing metal fitting. Related to the reinforced soil structure constructed.

[0002]

2. Description of the Related Art FIG. 9 (a) shows an example of a conventional example of a reinforced earth wall structure constructed as a retaining wall facing a road or a residential land, for example. A plurality of embankments are connected to each other in the horizontal direction to construct an embankment wall A that is continuous in the up-down direction and the horizontal direction. It is built while filling. In addition, the settlement, movement, and erosion of the embankment 31 are prevented in the embankment 31, and a wall panel is provided on the surface layer of the embankment 31.
A plurality of embankment reinforcing members 32 for fixing 30 are buried.

[0003] As the embankment reinforcing material 32, a steel material, a reinforcing bar, a wire mesh, a geotextile, or the like is used. Further, a fixing plate 33 for preventing the embankment reinforcing member 32 from being pulled out is attached to a tip portion of the embankment reinforcing member 32.

[0004]

However, the wall panel 30
Are fixed one by one to the surface layer of the embankment 31 with the embankment reinforcing material 32, and the earth pressure received by each wall panel 30 is not necessarily uniform, and generally increases in proportion to the depth of the embankment 31. For this reason, adjacent wall panels 30
However, there has been a problem that the butted portions of the pieces are easily shifted.

When a geotextile is used as the embankment reinforcing material 32, the geotextile is soft and easily displaced following the displacement of the embankment 31, so that it is hardly subjected to stress concentration, but has a large elongation and displacement. 30 may easily tilt or move,
It is not suitable as an embankment reinforcing material that also serves as a fixing member for fixing the wall panel 30.

On the other hand, when a steel material or a reinforcing bar is used as the embankment reinforcing material 32, the steel material has a large restraining effect of the embankment 31 and has high strength and bending rigidity, and hardly causes elongation or displacement. Although it is excellent as an embankment reinforcing material that also serves as a fixing member, it is difficult to follow the displacement of the embankment 31 due to its high rigidity. In some cases was sheared and broken at the connection portion.

[0007] Therefore, as shown in FIG. 9B, for example, the applicant of the present invention has provided a vertically long slot 34a in the back of the wall panel 30.
Projecting connecting metal fittings 34 having
a that was developed to prevent the shear rupture of the embankment reinforcement material 32 due to stress concentration due to settlement of the embankment 31 by connecting the end of the embankment reinforcement material 32 so that it can slide freely in the vertical direction. .

[0008] However, each wall panel 30 is made of embankment reinforcing material.
Since they are individually fixed by 32, the abutting portion of the wall panels 30 is easily displaced in the event of an earthquake, for example, because the earth pressure received by each wall panel 30 is not uniform as described above. And other issues.

[0009] Further, the applicant further proposes, for example, FIG.
As shown in FIG. 3 (c), bar-shaped connecting fittings 35 each having a ring 35a at the end thereof are projected obliquely on the rear surface of the adjacent wall panel 30, and embankments common to the ring 35a of the connecting fitting 35 are provided. A method for simultaneously fixing the vertically adjacent wall panels 30 by rotatably connecting the ends of the reinforcing members 32 has been developed, and an application has already been filed.

However, in this method, there is no particular problem when a tensile force or a compressive force is simultaneously applied to the connecting portion between the embankment reinforcing material 32 and the upper and lower wall panels 30, but the embankment reinforcing material is not affected.
When a tensile force acts on the connecting portion between the wall panel 30 and the one wall panel 30, a compressive force acts on the connecting portion between the embankment reinforcing material 32 and the other wall panel 31, so that both the wall panels 31 are easily displaced. There were challenges.

The embankment reinforcing material 32 is desirably installed in a state where a prestress is introduced so as to pull the wall panel 30 toward the embankment 31 side, because it is desirable to eliminate the looseness of the connection portion with the wall panel 30 and the like. After the embankment reinforcing material 32 is installed, the fixing nut 34 of the fixing plate 33 is retightened, and the fixing plate 33 is shifted to the wall panel 30 side to introduce a prestress to the embankment reinforcing material 33. It was not a sufficient measure because it was forced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in particular, a wall panel for holding an embankment can be reliably fixed, and displacement or displacement of abutting portions of adjacent wall panels can be reliably prevented. An object of the present invention is to provide an embankment reinforcing material fixing metal fitting and a reinforcing earth structure that can be used.

[0013]

SUMMARY OF THE INVENTION An embankment supplement according to the present invention.
Fixing the wall panel that holds the strong metal anchor and the embankment
To the embankment reinforcement, and pull the embankment reinforcement
It is an embankment reinforcing material fixing metal that prevents pulling out.
When viewed from the side, in the direction opposite to the direction of pulling out the strong material
It is bent in the shape of a `` ku '' and has multiple ribs or protrusions on the surface.
Have a number. In addition, the embankment reinforcing material fixing bracket is square, inverted
It is formed in a rectangular or semicircular plate shape.

[0014] The reinforcing soil structure according to the present invention maintains the embankment.
Wall panels to be held vertically and horizontally.
To build the embankment wall, and fill the back of the embankment wall
Fill the soil, hold the embankment in this embankment and
Embed multiple embankment reinforcements to fix wall panels
In the reinforced soil structure consisting of:
Attach the reinforcement fixing hardware.

The upper and lower ends of the wall panel are provided with wall panels.
Connecting brackets projecting from the back side of the
Attach vertical bolts between connecting brackets and vertically adjacent walls
Connect the face panels together and fill this vertical bolt
Connect the ends of the reinforcement. The connection bracket is on the side of the wall panel
At predetermined intervals in the horizontal direction or horizontally across the wall panel
And protrude.

Reinforcing ribs are provided on both upper and lower ends of the wall panel.
And connecting metal fittings are protruded from the reinforcing ribs.
You.

In addition, embankment reinforcing material is provided on the back of the wall panel.
The ends of are connected so that they can slide vertically.
The embankment reinforcing material fixing bracket is attached to the embankment reinforcing material.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 of the Invention 1 to 3 show an embodiment of the present invention. In the drawings, a plurality of wall panels 1 are installed in a vertical direction and a horizontal direction, respectively, facing a road, a residential area, or the like, so that the vertical direction and the horizontal direction are set. The embankment wall A continuous with the embankment is constructed, and the embankment 2 is filled into the back of the embankment wall A while carefully rolling.

In the embankment 2, each of the wall panels 1 is fixed to the surface layer of the embankment 2, and a plurality of embankment reinforcing members 3 for preventing the embankment 2 from subsidence, movement, runoff and the like are embedded. Further, an embankment reinforcing material fixing metal fitting 4 for preventing the embankment reinforcing material 3 from being pulled out is attached to an end of the embankment reinforcing material 3.

The wall panel 1 is formed in a rectangular plate shape from, for example, a concrete plate or a lightweight cellular concrete plate, and connecting metal fittings 5 for connecting the ends of the embankment reinforcing material 3 to the rear portions at the upper and lower ends thereof project horizontally. Has been established. In addition, the wall panel 1 adjacent to the upper and lower ends and the left and right ends
A hole or a concave groove 1a for inserting the connecting metal fitting 6 for connecting each other is formed.

Then, as shown in FIG. 2, the adjacent wall panels 1 engage a rod-shaped or plate-shaped connection metal fitting 6 between the holes or grooves 1a with their ends engaged with the holes or grooves 1a. Each is connected by installing.

The connecting fittings 5 are formed in a thin plate shape. For example, a plurality of connecting fittings 5 are provided at predetermined intervals in the lateral direction (for example, both ends and the center in the lateral direction of the wall panel 1) (see FIG. 1B), or in the lateral direction. (See FIG. 1 (c)). The connection fitting 5 has a connection hole 5a. At this time, in the former case, one piece is provided for each of the connecting fittings 5 (see FIG. 1B), and in the latter case, a plurality is formed at predetermined intervals in the horizontal direction (FIG. 1).
(c)). The connection fitting 5 is firmly fixed in the concrete of the wall panel 1 by an anchor reinforcing bar (not shown).

The embankment reinforcing member 3 is made of a reinforcing steel bar or a reinforcing steel grit, in addition to the strip-shaped steel material as shown in the figure, and is attached between the connecting metal members 5, 5 via a vertical bolt 6. The vertical bolts 6 are respectively passed through the connection holes 5a of the upper and lower connection fittings 5, and are fixed vertically to the ends thereof with fixing nuts 6a (see FIG. 2). In this way, the vertically adjacent wall panels 1,1
Are fixed to the surface layer of the embankment 2 by a common embankment reinforcing material 3 at both upper and lower ends thereof.

In such a configuration, the vertically adjacent wall panels 1 are fixed by the common embankment reinforcing material 3 even if they receive different earth pressures, so that the butted portions are easily shifted or displaced. Can be prevented.

Further, even if the embankment reinforcing material 3 sinks with the settlement of the embankment 2, the end of the embankment reinforcing material 3 can be lowered along the vertical bolt 6, so that there is no possibility that the connecting portion is subjected to stress concentration. It is possible to prevent the shear fracture of the connecting portion.

FIGS. 4 (a), 4 (b), 4 (c), and 4 (d) show modified examples of the connecting fittings, and in particular, those shown in FIG.
Is formed in a U-shape, has a vertically long hole 7b in a web portion 7a thereof, and is attached to the adjacent upper and lower wall panels 1, 1 so as to straddle both.

An end of the embankment reinforcing member 3 penetrates the elongated hole 7b, and is connected so that the fixing member of the fixing nut is attached to the penetrating portion so that the embankment reinforcing member 3 can freely slide up and down.

As shown in FIG. 4 (b), connecting metal fittings 7 are attached to the back surface of each wall panel 1, and the end of the embankment reinforcing material 3 is inserted into the long hole 7b of the connecting metal fitting 7. 4
They may be connected so that they can slide up and down in the same manner as shown in (a).

FIG. 4 (c) shows that the connecting member 8 has a simple plate shape, has a vertically long slot 8a in the center, and is formed at the abutting portion of the upper and lower wall panels 1,1. It is attached to both sides of the recess 1b. The end of the embankment reinforcing material 3 is connected to the elongated hole 8a so as to be freely slidable in the vertical direction.

Further, the one shown in FIG. 4 (d) is such that the end of the embankment reinforcing material 3 made of a reinforcing bar or the like is simply wound around a vertical bolt 6 or a reinforcing bar attached between the upper and lower connecting fittings 5,5. Connected.

The embankment reinforcing material fixing bracket 4 is, for example, rectangular, inverted triangular (see FIG. 3C) or semicircular (see FIG. 3C).
(d), and the embankment reinforcing material 3
In a direction opposite to the pulling-out direction. Further, in order to enhance the adhesion of the embankment 2 to the surface, the lateral ribs or protrusions 4a (FIG. 3)
(See (b)). In addition, a hole 4b through which the end of the embankment reinforcing material 3 passes is formed substantially in the center. Then, the embankment reinforcing material fixing metal fitting 4 is fixed to the end of the embankment reinforcing material 3 by inserting the end of the embankment reinforcing material 3 into the hole 4b and screwing the fixing nut 4c to the end of the embankment reinforcing material 3. ing.

When a steel material is used as the embankment reinforcing material 3, a bolt 3a is attached to the end of the steel material as shown in FIG.
And the embankment reinforcing material fixing metal fitting 4 is attached to the bolt 3a. When a screw rebar is used, it can be directly attached to the end of the screw rebar. Furthermore, when using geotextiles, they are attached to the end of the geotextile.

In such a configuration, the embankment reinforcing material fixing metal fitting 4 is formed in a direction opposite to the pull-out direction of the embankment reinforcing material 3 so as to be bent in the shape of a "ku" in a side view. From the embankment 2 after installing the embankment reinforcement 3
During the rolling of the embankment, the embankment reinforcing material fixing metal fitting 4 is pushed into the embankment 2 and at the same time moves in a direction (arrow direction) opposite to the direction in which the embankment reinforcing material 3 is pulled out. A prestress is introduced to pull toward the embankment 2 side. In addition, a part 2a of the embankment 2 on the surface side of the embankment reinforcing material fixing bracket 4 is firmly compacted to perform a wedge action (see FIG. 2). Therefore, the connection between the wall panel 1 and the embankment reinforcing material 3 is not loosened, and the wall panel 1 can be reliably installed.

Even after the embankment is installed, the embankment reinforcing material fixing metal fitting 4 is pushed into the embankment 2 by the natural settlement of the embankment 2 and moves in the direction of the arrow at the same time, so that a prestress is introduced into the embankment reinforcing material 3. Therefore, the connecting portion does not come loose even after the construction.

Embodiment 2 of the Invention FIGS. 5 and 6 show another embodiment of the present invention.
The same parts as those shown in FIG.

At each of the upper and lower ends of the wall panel 1,
Reinforcing ribs 1c having a substantially rectangular cross section protruding to the rear side are formed continuously in the lateral direction, and connection fittings 5 are respectively provided on the reinforcing ribs 1c. The connection fitting 5 is shown in FIGS.
Are formed exactly like those shown in FIG.

FIGS. 7 (a) and 7 (b) show a modification of the connecting bracket. In particular, the one shown in FIG. 7 (a) shows a connection between the reinforcing ribs 1c and 1c of the vertically adjacent wall panel 1. FIG. A connecting metal fitting 7 having a U-shape is attached to both sides. An end of the embankment reinforcing material 3 is connected to the elongated hole 7b so as to be freely slidable in the vertical direction. Also in this case, the end of the embankment reinforcing material 3 penetrates the long hole 7b, and is connected so as to be freely slidable in the vertical direction by attaching a fixing member such as a fixing nut to the penetrating portion.

In this case as well, connecting metal fittings 7 are projected from each of the reinforcing ribs 1c of each wall panel 1, and the ends of the embankment reinforcing material 3 can be freely set in the elongated holes 7b in the vertical direction. It may be attached so that it can slide (not shown).

FIG. 7 (b) shows a plate-like connecting metal fitting 8 formed in a concave portion 1d formed straddling the butting portion of the reinforcing rib 1c of the vertically adjacent wall panel 1. Is attached to both sides. The end of the embankment reinforcing member 3 is connected to the long hole 8a so as to be freely slidable in the vertical direction.

FIGS. 8 (a) and 8 (b) also show a modification of the connection fitting. In particular, the one shown in FIG.
Recess 1d formed straddling both sides at the butt portion of 1c
, A connecting bolt 6 is vertically attached, and the end of the embankment reinforcing material 3 is connected to the connecting bolt 6.

8B, a vertical bolt 6 is vertically mounted between upper and lower connecting fittings 5, 5 projecting from upper and lower reinforcing ribs 1c, 1c. The ends of the embankment reinforcing member 3 made of a material such as the above are connected by simply winding or the like.

In such a configuration, the vertically adjacent wall panels 1 can be easily shifted or displaced at the butted portions of the wall panels 1 by the same operation as that shown in FIGS. Can be prevented. In addition, it is possible to prevent the connection portion of the embankment reinforcing material 3 from being subjected to stress concentration and being sheared and fractured.

[0043]

The embankment reinforcing material fixing bracket according to the present invention has the above-described structure, and is particularly formed by bending the embankment reinforcing material in a "-" shape in a side view in the pull-out direction of the embankment reinforcing material. Therefore, when the embankment is rolled after the embankment reinforcement is installed, the embankment reinforcement fixing metal is pushed into the embankment and at the same time moves in the direction (arrow direction) opposite to the direction in which the embankment reinforcement is pulled out. Prestress is introduced into the reinforcement to pull the wall panel toward the embankment side. Therefore, the connection portion between the wall panel and the embankment reinforcing material is not loosened, and the wall panel can be reliably installed. In addition, even after construction, the embankment reinforcing material fixing metal fitting is pushed into the embankment due to natural settlement of the embankment and moves in the direction of the arrow at the same time, so that prestress is introduced into the embankment reinforcing material. Therefore, the connecting portion does not come loose even after the construction.

In the reinforcing soil structure according to the present invention, especially, connecting metal fittings projecting to the rear side are projected from the upper and lower ends of the vertically adjacent wall panels, and connecting bolts are attached between the connecting metal fittings to vertically move. It is constructed by connecting adjacent wall panels and connecting the ends of the embankment reinforcement to these connection bolts, and fixing the vertically adjacent wall panels with a common embankment reinforcement. Even if the earth pressure received by the wall panel adjacent to
It is possible to prevent the butted portion from being easily shifted or displaced. Also, even if the embankment reinforcing material sinks as the embankment sinks, the connecting metal end of the embankment reinforcing material can be lowered along the connecting bolt, so that there is no risk of stress concentration at the connecting portion, and therefore, the shearing of the connecting portion Breakage can also be prevented.

Furthermore, since the embankment reinforcing member fixing metal fitting for preventing the pull-out is attached to the end of the embankment reinforcing material, the embankment reinforcing material fixing metal fitting is used during the compaction of the embankment and by the natural settlement of the embankment after the construction. Is pushed into the embankment and moves in the direction of the arrow at the same time, so that prestress is introduced into the embankment reinforcement. Therefore, in both cases of the compaction of the embankment and the natural settlement of the embankment after construction, the connection between the wall panel and the embankment reinforcing material does not loosen, and the extremely stable reinforced earth structure Can be provided.

[Brief description of the drawings]

FIG. 1 (a) is a partial longitudinal sectional view of a reinforced soil structure, and FIGS. 1 (b) and (c) are transverse sectional views thereof.

FIG. 2 is a longitudinal sectional view showing a connecting portion between an upper and lower wall panel and an embankment reinforcing material.

FIGS. 3 (a), (b), (c), and (d) show embankment reinforcing material fixing metal fittings for preventing pull-out, respectively, and (a) is a longitudinal sectional view thereof;
(b) is a side view, and (c) and (d) are front views.

FIGS. 4 (a), (b) and (c) are longitudinal sectional views showing a connecting portion between a wall panel and an embankment reinforcing material, and (d) is a transverse sectional view thereof.

FIG. 5 (a) is a partial longitudinal sectional view of a reinforcing soil structure, and FIGS. 5 (b) and (c) are transverse sectional views thereof.

FIG. 6 is a longitudinal sectional view showing a connecting portion between an upper and lower wall panel and an embankment reinforcing material.

FIGS. 7 (a) and 7 (b) are longitudinal sectional views each showing a connecting portion between an upper and lower wall panel and an embankment reinforcing material.

8A is a longitudinal sectional view showing a connecting portion between an upper and lower wall panel and an embankment reinforcing material, and FIG. 8B is a transverse sectional view thereof.

FIGS. 9 (a), (b) and (c) are partial longitudinal sectional views showing an example of a conventional example of a reinforced soil structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall panel 1a Hole or concave groove 1b Recess 1c Reinforcement rib 2 Fill 3 Fill reinforcement 4 Fill reinforcement metal fitting 4a Horizontal rib or protrusion 4b Hole 4c Fixing nut 5 Connection metal 5a Connection hole 6 Vertical bolt 7 Connection metal 7a Web 7b Slot 8 Connecting bracket 8a Slot

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaru Hoshigaya 2200-22, Kamigocho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Naoaki Susumasa 573-74, Kishine-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture (56) References Special JP-A-61-216928 (JP, A) JP-A-3-76928 (JP, A) JP-A-63-297626 (JP, A) JP-A-61-78923 (JP, A) (58) Int.Cl. ⁷ , DB name) E02D 17/18-17/20

Claims (7)

(57) [Claims] 1. A wall panel for holding an embankment is fixed.
To the embankment reinforcement, and pull the embankment reinforcement
It is an embankment reinforcing material fixing metal that prevents pulling out.
When viewed from the side, in the direction opposite to the direction of pulling out the strong material
It is bent in the shape of a `` ku '' and has multiple ribs or protrusions on the surface.
An embankment reinforcing material fixing bracket characterized by having a number. 2. The embankment reinforcing material fixing bracket according to claim 1, wherein the metal is formed in a quadrangular, inverted triangular or semicircular plate shape. 3. A wall panel for holding the embankment in a vertical direction.
And set up a plurality of each in the horizontal direction to build the embankment wall,
Fill the back of the embankment wall with the embankment.
To hold the fill and fix the wall panels
In a reinforced soil structure with multiple embankment reinforcements embedded,
The embankment reinforcement material according to claim 1 or 2 is used as the embankment reinforcement material.
Reinforced earth structure characterized by attaching metal fittings. 4. The wall panel is provided at both upper and lower ends of the wall panel.
Protruding connection brackets projecting to the back side
Attach vertical bolts between the brackets and install
Connect the flanks and reinforce the embankment with this vertical bolt
4. The end of the material is connected.
Reinforced soil structure. 5. The connecting bracket is provided for a predetermined distance in the lateral direction of the wall panel.
Protrude at intervals or continuously in the horizontal direction of the wall panel.
The reinforced earth structure according to claim 4, wherein the reinforced earth structure is provided. 6. Reinforcing ribs are provided at both upper and lower ends of the wall panel.
Each of them is protruded, and a connecting bracket is protruded from this reinforcing rib.
The reinforced soil structure according to claim 4 or 5, wherein: 7. The wall panel for holding the embankment is vertically oriented
And set up a plurality of each in the horizontal direction to build the embankment wall,
Fill the back of the embankment wall with the embankment.
To hold the fill and fix the wall panels
In a reinforced soil structure with multiple embankment reinforcements embedded,
The end of the embankment reinforcement on the back of the wall panel in the vertical direction
Connect so that it can slide, and request this embankment reinforcement
Attach the embankment reinforcing material fixing bracket according to item 1 or 2.
Reinforced soil structure, characterized in that there.