JPH1136308A - Reinforcing earth-retaining wall panel and reinforced earth structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a light-weight and costless wall face panel, by projecting a part of an anchor metal tool to the rear face side, at the rear face part and continuously embedding the anchor metal tools in the lateral direction. SOLUTION: A part of an anchor metal tool 4 is projected to the rear face side, at the rear face part of a wall face panel 1 and the anchor metal tools 4 are continuously embedded in the lateral and/or vertical direction. And hence, even if a large tensile strength acts on reinforcing members for an embankment, connected to the anchor metal tools 4, owing to the settlement of the embankment, the tensile strength transferred from the reinforcing members 3 to the wall face panel 1 through the anchor metal tools 4 is evenly distributed to the whole wall face panel 1 and the concentration of stresses is avoided, as the anchor metal tools 4 made of angle steel or the like are laterally and continuously formed. Accordingly, it is not necessary to partly make thick the projecting part of the anchor metal tool or unnecessarily make thick the whole panel to reinforce it and hence, the production cost can be reduced because of the reduction of the weight and the materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced soil wall panel (hereinafter, referred to as a "wall panel") which is placed on top of an embankment to hold an embankment and a reinforced soil structure comprising the wall panel.

[0002]

2. Description of the Related Art FIG. 9 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 reinforced soil wall surfaces A which are continuously installed in the vertical and horizontal directions are constructed while being connected to each other, and the embankment 31 including excavated soil generated in large quantities on site is rolled behind the reinforced soil wall surface A while rolling. Built with filling. In the embankment 31, a plurality of embankment reinforcing materials 32 for fixing the wall panel 30 to the surface layer portion of the embankment 31 while preventing the embankment 31 from subsidence, movement, runoff, and the like are embedded.

As the embankment reinforcing material 32, a steel material, a reinforcing bar, a wire mesh, a reinforcing bar grit, a geotextile, or the like is used. The embankment reinforcing material 32 is connected to anchors 33 protruding from the rear surface of the wall panel 30.

[0004]

The wall panel and the reinforcing soil structure of this kind are configured as described above. In particular, the anchor 33 is formed of, for example, a reinforcing bar or a stud bolt. Since it is scattered at a predetermined interval by being buried in the back of 30, it is protruded,
The pulling-out force from the embankment reinforcing material 32 acts intensively on the protruding portion of the anchor fitting 33.

Therefore, it is necessary to increase the diameter and thickness of the anchor 33 so that the anchor 33 is not deformed by the concentrated stress, and the anchor 33 is not easily removed. As described above, it is necessary to increase the thickness of the entire wall panel 30 or to partially increase the protruding portion of the anchor fitting 33 more than necessary so that the akanker fitting 33 can be sufficiently fixed. However, there are problems such as increased production cost and increased weight, making handling difficult.

Further, in order to disperse the tensile force from the embankment reinforcing material 32 and thereby avoid stress concentration, a large number of anchor fittings 33 are protrudingly provided on the back surface of the wall panel 30, and each of the anchoring fittings 33 is provided with a reinforcing embankment. There is also a problem that the materials 32 need to be connected and the construction is troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in particular, a reinforced earth wall panel and a reinforcement capable of reducing the weight of the wall panel, reducing the manufacturing cost, and stabilizing the panel for a long period of time. The purpose is to provide an earth structure.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, a reinforced earth wall panel according to the present invention has an anchor fitting buried in a rear portion thereof with a part thereof protruding to the rear side and continuously buried in a lateral direction. It is formed. Shaped steel is buried as an anchor.

In the reinforcing soil structure according to the present invention, a plurality of reinforcing soil wall panels are provided in the surface layer of the embankment layer in a vertical direction and a lateral direction, respectively, to construct an embankment wall surface, and the embankment is placed on the back of the embankment wall surface. It is constructed by filling and embedding a plurality of embankment reinforcing materials in this embankment and connecting to the anchor fittings. At that time, the embankment reinforcing material may be connected to the anchor fitting so as to be slidable in the up-down direction.

[0010] Further, one or a plurality of fixing brackets formed by bending in the shape of a "ku" in a side view are attached to the embankment reinforcing material in a direction opposite to the pulling-out direction of the embankment reinforcing material. Is also good.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 of the Invention 1 to 9 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 2 is filled with the backfill of the reinforced soil wall surface A while carefully rolling it.

In the embankment 2, each of the wall panels 1 is fixed to the surface layer of the embankment 2, and the embankment 2
A plurality of embankment reinforcements 3 are buried to prevent settlement, movement, and runoff. The embankment reinforcing material 3 is connected to anchors 4 projecting from the rear surface of the wall panel 1. Further, the wall panel 1 to which the fixing metal members 5 for preventing the anchor metal members 4 from being pulled out is attached to the distal end portion is formed into a rectangular plate shape from a concrete plate reinforced by reinforcing bars arranged in a grid, for example. Anchor fittings 4 are provided horizontally and laterally continuously at both upper and lower ends or both the upper and lower ends and the central portion on the rear side. Further, a recess 1a is formed in the peripheral portion of the wall panel 1 so that adjacent panels are joined to each other.

The anchor fitting 4 is formed from an angle steel, an H-section steel, a channel steel, or the like, and a part (a flange or a web, or a part of both the flange and the web) protrudes from the rear surface of the wall panel 1. It is buried. A plurality of connection holes 6 for connecting the embankment reinforcing material 3 are formed at predetermined intervals in the protruding portion. Further, the anchor 4 is directly welded to a reinforcing net (for example, see FIG. 9 (a)) arranged in a lattice in the concrete of the wall panel 1, or directly through a connecting fitting or surrounding concrete. It is fixed to ensure the transmission of force.

4 (a), (b), (c), (d), (e), and (f) show examples of wall panels. For example, FIG. In this portion, an angle iron is embedded as an anchor fitting 4 and one flange 4a is projected to the rear side, and the end of the embankment reinforcing member 3 is connected to the flange 4a.

FIG. 1B shows two angle irons embedded as anchors 4 on the rear side of the wall panel 1 and one flange 4a protruding parallel to the rear side.
The end of the embankment reinforcing member 3 is connected between them.

FIG. 3C shows that an H-shaped steel is embedded as an anchor 4 on the rear surface of the wall panel 1 and one of the flanges.
4a and a part of the web 4b project to the rear side, and this flange 4a
The end portions of the embankment reinforcing member 3 are connected to each other.

FIG. 4D shows an H-shaped steel buried as an anchor 4 on the back of the wall panel 1 and upper and lower flanges 4a.
Of the embankment reinforcing member 3 is projected between the upper and lower flanges 4a, 4a.

FIG. 1E shows that a channel steel is buried in the back of the wall panel 1 as an anchor fitting 4 and that upper and lower flanges 4a are provided.
Of the embankment reinforcing member 3 is projected between the upper and lower flanges 4a, 4a.

In FIG. 1F, a channel steel is embedded as an anchor fitting 4 on the back surface of the wall panel 1, and a part of the upper and lower flanges 4a and the web 4b are protruded to the back side. The end portions of the member 3 are connected.

As a method for connecting the end of the embankment reinforcing material 3 to the anchor fitting 4, a connection may be made by connecting bolts 7 penetrating through connection holes 6 formed at predetermined intervals to the flange 4 a or the web 4 b (for example, see FIG. 4 (a), (f)), or a hook 8 protruding from the end of the embankment reinforcing material 3 and directly hooking the hook 8 to the connection hole 6 to connect (see FIG. 3). .

At this time, according to the connecting method shown in FIGS. (B), (d) and (e), the end of the embankment reinforcing material 3 can slide downward along the connecting bolt 7, so that the embankment 2 Even if the embankment reinforcing material 3 is strongly pulled downward, the wall panel 1 is not displaced or the end of the embankment reinforcing material 3 is broken. Also in the connection method shown in FIG. 5F, the same effect can be obtained by forming the connection hole 6 for passing the end of the embankment reinforcing material 3 to be a vertically elongated slot. Alternatively, the end of the embankment reinforcing material 3 may be simply wound around the connecting bolt 7 and connected (not shown).

Further, as shown in FIGS. 5 (a) and 5 (b), for example, connecting bolts 9 penetrating through connecting holes 6 of anchor fittings 4 protruding from the back surface of the vertically adjacent wall panel 1, respectively. The vertically adjacent wall panels 1 can be connected to each other, and the horizontally adjacent wall panels 1 can be connected to each other.
Since the two can be easily connected to each other by connecting the two anchors 4, the reinforcing earth wall A composed of a plurality of wall panels can be a continuous wall.

The embankment reinforcing material 3 is formed of a reinforcing steel bar, a reinforcing steel grit, a geotextile, or the like, in addition to the strip steel material as shown in the figure.

The fixing fitting 5 attached to the embankment reinforcing material 3 is, for example, rectangular or inverted triangular (FIG. 7 (c)).
) Or a semicircular shape (see FIG. 7 (d)), and is formed by bending in a direction opposite to the pulling-out direction of the embankment reinforcing material 3 into a “<” shape when viewed from the side. Have been. Further, a plurality of horizontal ribs or projections 5a (see FIG. 7B) are formed on the surface to enhance the adhesion of the embankment 2. A hole for passing the end of the embankment reinforcing material 3 approximately in the center.
5b is formed. The fixing member 5 is fixed to an end of the embankment reinforcing member 3 by inserting an end of the embankment reinforcing member 3 into the hole 5b and screwing a fixing nut 8 to the end of the embankment reinforcing member 3.

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 fixing bracket 5 is attached to the bolt 3a.
When a threaded bar is used, it can be attached directly to the end of the threaded bar. Furthermore, when using geotextiles, they are attached to the end of the geotextile.

In such a configuration, as shown in FIG. 8 (a), a reinforcing bar net 1b arranged as reinforcement in the concrete of the wall panel 1 and an embankment reinforcing material 3 embedded in the embankment 2 are formed. It is integrated by an anchor 4 attached to the back of the wall panel 1. Therefore,
Even if the concrete of the wall panel 1 is destroyed by the earth pressure of the heterogeneous embankment 2, the reinforcing bar 1b is integrated with the anchor metal 4 continuous in the upper and lower direction directly or by the adhesive force with the concrete. In particular, since the shaped steel as the anchor 4 that is continuous in the lateral direction has a large rigidity in the horizontal direction, it is difficult to bend in the horizontal direction.

On the other hand, since the reinforcing bar net 1b is flexible, it is vertically integrated with the upper and lower anchor fittings 4 which are continuous in the horizontal direction, so that even if the wall surface is broken, it is not deformed in the horizontal direction. As shown in FIG. 8 (b), the structure can be deformed in the vertical direction and can be compressed, so that the embankment 2 can be held only by the pulling force of the reinforcing bar 1b.
A structure that is difficult to break even when the thickness is reduced becomes possible.

FIG. 8 (c) is a schematic view showing the above function, and FIG. 8 (d) shows the embankment reinforcing member 3 connected to the anchor 4
FIG. 2 shows a schematic view of a structure connected so as to be slidable.

Even if a large tensile force acts on the embankment reinforcing material 3 due to the settlement of the embankment 2 or the like, the tensile force transmitted from the embankment reinforcing material 2 to the wall panel 1 via the anchor metal fittings 4 is equal to that of the anchor metal fittings 4. Are formed continuously from the angle iron or the like in the lateral direction, so that they are evenly distributed over the entire wall panel 1 and stress concentration can be avoided. Therefore, it is not necessary to partially increase the protruding portion of the anchor 4 or to make the entire panel thicker than necessary to reinforce it.

Also, for example, according to the examples of FIGS. 4B, 4D and 4E, even if the embankment reinforcing material 3 sinks with the settlement of the embankment 2, the end of the embankment reinforcing material 3 is connected to the connecting bolt. 7, the connecting portion is not subject to stress concentration, so that the connecting portion can be prevented from shearing and breaking.

Further, since the fixing metal member 5 is formed in a shape opposite to the pull-out direction of the embankment reinforcing member 3 so as to be bent in the shape of a "ku" in a side view, the embankment reinforcing member 3 is formed.
When the embankment 2 is installed, the fixing metal 5 is pushed into the embankment 2 and moves in the direction (arrow direction) opposite to the direction in which the embankment reinforcement 3 is pulled out at the same time. Prestress is introduced so as to pull the wall panel 1 toward the embankment 2 side. In addition, a part 2a of the embankment 2 on the front side of the fixing bracket 4 is firmly compacted to perform a wedge action (see FIG. 6). 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.

Further, even after the construction, the 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 the prestress is introduced into the embankment reinforcing material 3. Therefore, even after the construction, the connecting portion does not loosen, and a reinforced structure that is stable for an extremely long period can be constructed.

[0033]

The present invention has the above-described structure,
A part of the anchor is protruded to the rear side of the wall panel, and is buried continuously in the horizontal or vertical direction, or in both the horizontal and vertical directions, so that the anchor is connected to the anchor. Even if a large tensile force acts on the embankment reinforcing material due to the settlement of the embankment, etc., the tensile force transmitted from the embankment reinforcing material to the wall panel via the anchor metal, especially when the anchor metal is horizontal from the angle iron etc. By being formed continuously,
Evenly distributed throughout the wall panel, stress concentration can be avoided. Therefore, there is no need to partially increase the protruding portion of the anchor fitting or to increase the thickness of the entire panel more than necessary to reinforce the panel, and it is possible to reduce the manufacturing cost by reducing the weight and saving the material. .

In addition, since the wall panel is formed as described above, and the end of the embankment reinforcing member is connected to the anchor fitting so as to be slidable in the vertical direction, the embankment reinforcing material may be sunk in the embankment. Even if it sinks, the end of the embankment reinforcing material descends along the connecting bolt, so that there is no risk of stress concentration at the connecting part, so that the connecting part is sheared and ruptured or the wall panel is pulled and displaced And a fixing bracket that is bent in the shape of a "ku" in side view is attached to the embankment reinforcement in a direction opposite to the direction in which the embankment reinforcement is pulled out. Since the embankment reinforcing material can be firmly fixed in the embankment, there is an effect that a very stable reinforced earth structure can be provided for a long period of time.

[Brief description of the drawings]

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

FIG. 2 is a partial perspective view of a wall panel.

FIG. 3 is a partial perspective view of a wall panel.

[FIG. 4] (a), (b), (c), (d), (e), (f) are all partial longitudinal sectional views showing an example of a connection method between a wall panel and an embankment reinforcing material. It is.

FIGS. 5 (a) and 5 (b) are partial longitudinal sectional views each showing a connecting portion of a wall panel.

FIG. 6 is a sectional view showing a connecting portion between the wall panel and the embankment reinforcing material.

7A is an exploded cross-section showing a method of attaching a fixing bracket, FIG. 7B is a side view of the fixing bracket, and FIGS. 7C and 7D are front views of the fixing bracket.

8A is a longitudinal sectional view of a wall panel, FIG. 8B is a longitudinal sectional view of the wall panel after deformation, and FIGS. 8C and 8D are schematic views of the wall panel.

FIG. 9 is a longitudinal sectional view showing an example of a conventional reinforcing soil structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall panel (reinforced soil wall panel) 1a Phased 1b Reinforcement net 2 Fill 3 Fill reinforcement 4 Anchor fitting 4a Flange 4b Web 5 Fixing fitting 6 Connection hole 7 Connection bolt 8 Fixing nut

Claims (5)

[Claims] 1. A reinforced earth wall panel installed on a surface portion of an embankment layer and holding an embankment, wherein an anchor is protruded from a back portion of the embankment layer so that a part of the anchor is protruded toward a back side and is continuously embedded in a lateral direction. A reinforced earth wall panel characterized by that: 2. The reinforced earth wall panel according to claim 1, wherein a shaped steel is buried as an anchor. 3. The embankment wall is constructed by installing a plurality of reinforcing earth wall panels according to claim 1 on the surface layer of the embankment layer in the vertical and horizontal directions, respectively, and constructing the back of the embankment wall. And a plurality of embankment reinforcing materials embedded in the embankment and connected to the anchor fittings, respectively. 4. The reinforcing soil structure according to claim 3, wherein an end portion of the embankment reinforcing material is connected to the anchor fitting so as to be slidable in a vertical direction. 5. An embankment reinforcing member which is attached to the embankment reinforcing material in a direction opposite to a direction in which the embankment reinforcing material is pulled out, the fixing bracket is formed by bending in the shape of a square in a side view. The reinforced soil structure according to claim 3 or 4, wherein