JPH07216892A - Earth reinforcing structure - Google Patents

Abstract

PURPOSE:To enhance the stability for a wall surface during construction, to facilitate the rolling for a banking so as to enhance the workability, to incorporate a block integrally with a skin layer part so as to prevent the wall surface from being deformed while holding the flexibility thereof, and to provide an earth reinforcing structure which is excellent in the overall stability. CONSTITUTION:A first reinforcing member adapted to be embedded deeply in an earth reinforcing structure, and a second reinforcing structure 3 adapted to be embedded in the skin layer part of the structure are embedded in a banking 2 of the structure. Further, reinforcing grids are used for the second reinforcing member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of embankment reinforcing members, an embankment material filled in the back surface of the embankment reinforcing member, and a plurality of layers embedded in the embankment material. The present invention relates to a reinforced earth structure including a plurality of reinforcing members connected to each other.

[0002]

2. Description of the Related Art As a reinforced soil structure constructed facing a road or the like, for example, FIG.
As shown in FIG. 2, a plurality of wall panels 20 made of concrete panels are filled with a filling material 21 on the back surface thereof, and are held by a plurality of reinforcing members 22 embedded in the filling material 21. Reinforced earth structures such as retaining walls constructed by stacking them are known.

However, in this type of reinforced earth structure, since the wall surface is easily displaced, the slip surface is generated from the lowermost portion of the wall surface, and in order to withstand the earth pressure acting on this wall surface, the reinforcing member for holding the wall panel 20. It is necessary to install a large amount of 22 and, further, it is necessary to embed the reinforcing member 22 in the embankment material 21 for a long time.

Further, since the wall surface is easily deformed when the embankment material 21 is compacted, the assembly and installation of the wall panel 20 and the reinforcing member 22 are liable to be complicated, and the construction is troublesome. There were issues such as becoming stable.

Further, since the stability of the wall panel 20 during construction is poor, the embankment material filled in the back surface of the wall panel 20.
There was a problem that the compaction of 21 could not be performed sufficiently, and therefore the wall displacement was large and an integrated reinforced soil structure could not be constructed.

Further, in this type of reinforced soil structure,
Since the embankment material 21 is displaced by rolling during construction, it is necessary to integrate the wall surface panel 20, the embankment material 21, and the reinforcing member 22 so that the wall surface is not destroyed.

Further, the wall surface of this type of reinforced earth structure needs to have flexibility to some extent. Therefore, the wall panel 20 is combined in a mosaic shape or a concrete block is used as a substitute for the wall panel 20. In addition, it corresponds by putting concrete or a resin plate between them.

However, on the other hand, there is a problem that the wall displacement is likely to be extremely large because of that or because it is difficult to roll the embankment material 21 near the wall portion.

This is not only aesthetically pleasing, but also structurally extremely uneconomical, and in a remarkable case, it may be destroyed.

In addition to the above, a reinforced soil structure using a reinforcing bar grit 23 instead of the wall panel 20 has been developed and filed by the applicant of the present invention (see FIG. 15). There was a drawback. Also, a device using a belly bar 24 as shown in FIG. 16 has been developed, but it has the same drawbacks.

The present invention has been made to solve the above problems, and improves the stability of the wall surface at the time of construction and facilitates the compaction of the embankment material to enhance the construction workability and the surface layer. By constructing a block body integrated with the part, while maintaining flexibility, prevent local deformation of the wall surface part,
Moreover, by constructing a reinforced soil structure with excellent overall stability, it is possible to solve the drawbacks of the conventional reinforced soil structure and to provide a reinforced member that has excellent workability and stability and supports the wall panel. It is an object of the present invention to provide a reinforced soil structure that can be reduced as much as possible to enhance workability and economy.

[0012]

A reinforced soil structure according to the present invention comprises a first reinforced member which is buried deep in the reinforced earth structure, as a reinforced member which is embedded in a filling material of the reinforced soil structure. A second reinforcing member embedded in the surface layer of the reinforced earth structure is used, and a reinforcing bar grit is used for the second reinforcing member.

[0013]

【Example】

Example 1. 1 to 3 show an embodiment of a reinforced soil structure according to the present invention, in which reference numeral 1 is stacked in a fill material 2 in a plurality of layers while alternately connecting with the fill material 2. The embankment reinforcing member 3 for preventing the collapse of the embankment material 2 and constructing a reinforced earth structure A such as a retaining wall is embedded in the surface layer portion of the embankment material 2, and the embankment reinforcement member 1 and the embankment material 2 are integrated. Is a second reinforcing member that constitutes a highly rigid block body B (a portion surrounded by symbols a, b, c, d) on the surface layer portion of the reinforced soil structure.

The embankment reinforcement member 1 is a wall portion 1a rising along the wall surface of the reinforcement earth structure A, and a first reinforcement member deeply and horizontally embedded in the embankment material 2 from the lower end of the wall portion 1a. The leg portion 1b and the leg portion 1b form an L-shape that is considerably longer than the wall surface portion 1a.

Further, the wall surface portion 1a and the leg portion 1b are arranged in a lattice panel form by arranging a plurality of vertical reinforcing bars and horizontal reinforcing bars crossing each other in the vertical and horizontal directions and integrally welding the intersections. .

The reinforcing member 3 is embedded in one or a plurality of layers between the upper and lower leg portions 1b, 1b. Further, the reinforcing member 3 is formed in a lattice panel shape by arranging a plurality of vertical reinforcing bars and horizontal reinforcing bars intersecting each other in a grid shape similarly to the embankment reinforcing member 1, and integrally welding the intersection points. It is a reinforced grit, and a hook 3a (see FIG. 3 (a)) or a ring 3b (see FIG. 3 (b)) is formed at its tip.

The hook 3a is attached to the embankment reinforcing member 1
It is connected to the embankment reinforcing member 1 by being hooked on the horizontal rebar of the wall surface portion 1a.

When the ring 3b is formed instead of the hook 3a, the ring 3b is inserted into the mesh of the wall surface portion 1a, and the connecting rod (not shown) made of a reinforcing bar or the like is inserted into the ring 3b. As a result, it is connected to the embankment reinforcing member 1.

Since the reinforcing member 3 is constructed in this way, the block body which is stable in strength and has high rigidity on the surface layer portion of the reinforced earth structure A by the wall surface portion 1a, the reinforcing member 3 and the embankment material 2 B (a, b, c, d areas in Fig. 1)
The block body B holds the embankment material 2 on the back surface thereof.

When the embankment material 2 is compacted, the wall portion of the embankment reinforcement member 1 is affected by the stress dispersion effect of the reinforcement member 3.
Local stress concentration acting on 1a is eliminated, and destruction of the wall surface is avoided.

Further, since reinforcing bar grit is used for the reinforcing member 3 and a plurality of vertical reinforcing bars and horizontal reinforcing bars are welded at right angles as shown in FIG. 3, the reinforcing bars are less stretched. And since the effect of restraining the soil by the horizontal rebar is great,
It is possible to prevent the embankment material 2 on the back surface of the wall surface portion 1a from loosening and to form a block.

Moreover, as shown in FIG. 3 (b), the mesh at the end is made fine and the mesh on the wall surface side is made large,
As described in the construction method of FIG. 7, after being fixed in the embankment by the mesh of the end portion, the embankment material 2 can be put into the large mesh on the wall surface side to be sufficiently compacted. It is possible to construct a strong block body B which is excellent in the wall surface side.

Example 2. 4 and 5 show another embodiment of the reinforced soil structure according to the present invention. In the drawings, the same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 4 represents the filling material 2 in the filling material 2.
And embankment reinforcing members which are stacked while alternately connecting with each other to prevent collapse of the embankment material 2 and constitute a reinforced earth structure A such as a retaining wall, and 5 are stacked upper and lower embankment reinforcement members 4, 4
A connecting rod made of a reinforcing bar or the like for connecting the reinforcing members, 6 is a deeply embedded reinforcing member in the embankment material 2, and holds each embankment reinforcing member 4, and 7 is a coupler for connecting the reinforcing member 6 to the embankment reinforcing member 4. And the reference numeral 8 is embedded in the surface layer portion of the reinforced earth structure A, and the embankment reinforcement member 4
The block body B with high rigidity by integrating the filling material 2 with the filling material 2
Is a reinforcing member.

The embankment reinforcement member 4 includes a wall surface portion 4a that rises along the wall surface of the reinforcement earth structure A, and a leg portion 4b that is horizontally projected from the lower end portion of the wall surface portion 4a and is embedded in the embankment material 2. To L-shaped. In addition, the wall portion 4a and the legs
4b is formed in a lattice by arranging a plurality of vertical rebars and horizontal rebars vertically and horizontally and integrally welding the intersections.

A convex portion 4c is formed on the upper end of the wall surface portion 4a. The convex portion 4c is formed by bending the upper end of each vertical reinforcing bar inward or outward in a U-shape (in the embodiment, it is bent outward). The convex portion 4c is inserted into the mesh of the wall surface portion 4a of the embankment reinforcing member 4 installed on the upper side, and the connecting rod 5 is inserted into the hole 4d formed by the convex portion 4c and the vertical reinforcing bar of the wall portion 4a. It is inserted and thus the upper and lower embankment reinforcement members 4, 4 are connected (Fig. 6).
reference).

As the reinforcing member 6, a strip-shaped reinforcing member made of steel, or an anchor bar having a support plate attached to its tip is used, and is connected by a connecting member 7 to the tip of the vertical rebar of the leg 4b. There is.

The reinforcing member 8 is exactly the same as the reinforcing member 3 of the first embodiment, and the reinforcing member 8 is embedded between the upper and lower reinforcing members 5, 5 in one or a plurality of layers.

7 (a) to 7 (h) show the construction sequence of this embodiment, which will be described below in order.

First, the bottom embankment reinforcing member 4A is installed on the ground surface, and the reinforcing member 6 is connected to the leg portion 4b of the embankment reinforcing member 4A by the connecting member 7.

If necessary, a sheet 9 for preventing sediment outflow is attached to the inside of the wall surface portion 4a of the embankment reinforcing member 4A. A vegetation mat may be used instead of the sediment outflow prevention sheet 9.

Next, sprinkle earth and sand on the reinforcing member 6,
The embankment layer 2a is constructed by rolling sufficiently. Then, a plurality of reinforcing members 8 are laid thereon, and hooks 8a at the tips thereof are hooked and connected to the horizontal reinforcing bars of the wall surface portion 4a (see FIG. 7 (a) and FIG. 3).

Next, the earth and sand are sprinkled on the reinforcing member 8 and sufficiently compacted to construct the embankment layer 2b (see FIG. 7 (b)).

Next, sediment was charged from the meshes of the reinforcing member 8, and builds fill portion ^2a, the by pressure sufficiently rolling by rolling intensifier portable compactor, and the like (see FIG. 7 (c)). In this case, since the reinforcing member 8 is connected to the wall surface portion 4a and fixed in the embankment layer 2b,
Embankment portion ^2a, also by applying rolling in constructing the wall surface portion 4a is seldom that produce stable and deformed.

Next, the same steps are performed as shown in FIG. 7 (d), (e), (f).
Repeat as.

Next, the work on the embankment layer 2c is performed to construct the embankment layer 2d continuous with the embankment layer 2a (see FIG. 7).
(See (g) and (h)).

In this case, the embankment reinforcing member 4A is connected to the embankment reinforcing member 4B installed above the embankment reinforcing member 4A (see FIGS. 7 (g) and 7 (h)).

To connect the embankment reinforcement members 4A and 4B,
The embankment reinforcing member 4B is installed on the embankment layer 2c, and the upper end portion of the wall surface portion 4a of the embankment reinforcing member 4A is superposed on the inside of the wall surface portion 4a of the embankment reinforcing member 4B and the wall surface portion of the embankment reinforcing member 4B. The convex portion 4c of the embankment reinforcing member 4A is projected to the outside of the embankment layer 2 from the mesh of 4a.

Then, the connecting rod 5 is horizontally inserted into the hole 4d formed by the convex portion 4c and the vertical reinforcing bar of the wall surface portion 4a (FIG. 7).
(g), (h), see FIG. 6).

On the leg portions 4b of the embankment reinforcing member 4A, earth and sand are put in from the mesh of the leg portions 4b of the embankment reinforcing member 4B and sufficiently compacted (see FIG. 7 (h)).

In this case, since the upper end portion of the wall surface portion 4a of the embankment reinforcing member 4A is connected to the embankment reinforcing member 4B in the above-described manner, the wall surface portion 4a of the embankment reinforcing member 4A tilts forward due to rolling. There is no such thing.

Hereinafter, the same work is repeated to continuously construct the embankment layers 2d, 2e, ..., Thus, the whole is constructed (see FIG. 1).

As the embankment material 2, in addition to the earth and sand that are normally used, improved soil mixed with a solidifying material or lightweight embankment material may be used. It is also possible to use a curable fluid having

Example 3. 8 and 9 show another embodiment of the reinforced soil structure according to the present invention, the same parts as those of the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 8, reference numeral 10 is the embankment reinforcing member for holding the embankment material 2 to construct the reinforced earth structure A, and 11 is buried deeply and horizontally in the reinforced earth structure.
The first reinforcing member 12 for holding the embankment is embedded in the surface layer portion of the reinforced soil structure, holds the embankment reinforcing member 10 in the same manner as the first reinforcing member 11, and embeds the embankment reinforcing member in the surface layer portion of the reinforced earth structure A. A second reinforcing member that constitutes a block body B (a region portion surrounded by symbols a, b, c, d) that is stable in strength by 10 and the embankment material 2 on the surface layer portion of the reinforced soil structure A. .

The embankment reinforcing member 10, the first reinforcing member 11 and the second reinforcing member 12 are all formed by arranging a plurality of vertical reinforcing bars and horizontal reinforcing bars vertically and horizontally, and by welding the intersections integrally. It is configured in a shape.

The embankment reinforcing member 10 includes a wall surface portion 10a formed along the wall surface portion of the reinforced earth structure A, and a leg portion 10b horizontally protruding from the lower end portion of the wall surface portion 10a into the embankment material 2.
It is configured in an L shape from and.

Further, hooks 11a and 12a are formed at the tips of the first reinforcing member 11 and the second reinforcing member 12, respectively. The hooks 11a and 12a are respectively attached to the horizontal reinforcing bars of the wall surface portion 10a of the embankment reinforcing member 10. By hooking, the first reinforcing member
11 and the second reinforcing member 12 are connected to the embankment reinforcing member 10, respectively. Other configurations are substantially the same as those in the first embodiment.

FIG. 9 shows a case where the leg portion 11b of the embankment reinforcing member 10 is omitted, and the other structure is the same as that of the embodiment of FIG.

Example 4. 10 and 11 show another embodiment of the reinforced soil structure according to the present invention. In the drawings, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 13 is a concrete block (hereinafter referred to as a concrete block) which is stacked up to a predetermined height to construct the reinforced earth structure A.
“Block 13”), 14 are buried deep inside the embankment material 2, and the first reinforcing member that holds each block 13, and the reference numeral 15 is horizontally buried in the surface layer portion of the reinforced earth structure A. A second block forming a block body B (a part surrounded by symbols a, b, c, d) which is stable in strength by 13 and the embankment material 2 in a certain area which is filled very close to the back of the block 13. It is a reinforcing member.

Although various shapes are used for the block 13 depending on the purpose, a substantially rectangular parallelepiped concrete block reinforced with reinforcing bars or the like is usually used, and a manual or lightweight transport machine or lift is used. However, it is formed in a size that can be handled relatively easily, and is usually 5 to 60 cm in height and 10 in width.
A concrete block of ~ 100cm, depth 15-130cm, weight 15-100kg is suitable.

Upper and lower blocks 13,1 stacked in a plurality of stages
3 are connected to each other by a connecting member 16 (also referred to as “dough”) which is interposed between the upper and lower blocks 13 and 13 and which is composed of a reinforcing bar, a synthetic resin rod or the like. The connecting member 16 is inserted into a connecting hole 13a (also referred to as "dough hole") formed in the central portion of the upper and lower blocks 13. In this case, the connecting hole 13a is
Connecting member 16 so that 13,13 can move laterally to some extent
It is formed to be slightly larger than the diameter of the reinforced soil structure A so as to avoid destruction of the reinforced soil structure A due to stress concentration due to the block 13 moving when the embankment material 2 is compacted or when an earthquake occurs.

The connecting hole 13a is formed into upper and lower blocks 13,13.
The connecting member 16 made of a reinforcing bar or the like may be inserted into the connecting hole 13a over the entire height, and the periphery thereof may be filled with mortar.

Further, the upper and lower blocks 13 and 13 may have their contact surfaces meshed with each other by unevenness.
A cushioning material may be interposed between the three to add compressibility.

The same first reinforcing member 14 as that of the reinforcing member 6 of the second embodiment is used, and the hooking portions 13b (see FIG. 10) provided on the rear surface of each block 13 or the upper and lower blocks 1 are used.
It is connected to the connecting members 16 of 3, 13 (see FIG. 11).

Similarly to the reinforcing member 3 of the first embodiment, the second reinforcing member 15 is formed by arranging a plurality of vertical rebars and horizontal rebars so as to cross each other in a grid pattern, and by welding the intersections integrally with each other, a grid is formed. It is configured like a panel.

The second reinforcing member 15 is composed of the upper and lower blocks 13,13.
It is hooked on the connecting member 16 between and is connected to the upper and lower blocks 6.

As the second reinforcing member 15, a belt-like reinforcing member or a pressure-bearing plate may be used as long as it easily fits the surrounding embankment material 2 and is excellent in holding the embankment material 2 into a block. An attached anchor bar, rebar or synthetic resin net, grit, sheet, expanded metal or the like may be used.

Example 5. 12 and 13 show another embodiment of the reinforced soil structure according to the present invention, in which a concrete panel 16 is used to form the reinforced soil structure A, and the first reinforcement member 14 and the second reinforcement member The reinforcing member 15 is composed of a synthetic resin, a non-woven fabric, a geotextile, a reinforcing bar grit, an expanded metal, or a belt-shaped reinforcing material, a bearing anchor, and the like, and the other structures are substantially the same as those of the fourth embodiment.

[0061]

Since the present invention is constructed as described above, it has the following effects.

In the embankment material of the reinforced earth structure, as a reinforcement member, a first reinforcement member embedded deep in the reinforcement earth structure and a second reinforcement member embedded in a surface layer portion of the reinforcement earth structure. In addition, since reinforcing bar grit is used for the second reinforcing member, a strength stable block body is constructed in the surface layer part of the reinforcing soil structure, and this block body is buried deep in the embankment material. Since it is supported by the plurality of first reinforcing members, the displacement of the wall surface is small,
It has the effect of constructing a reinforced soil structure that is extremely stable in strength.

Further, since the reinforcing bar grit constructs a block body integrated with the back portion of the wall surface by the restraining effect of the horizontal reinforcing bar in the lateral direction, this block body itself is extremely stable. The number of one reinforcing member may be small, and therefore, the labor and the number of days required for installing the first reinforcing member can be reduced, and the construction cost can be reduced by saving the first reinforcing member.

Further, since the reinforcing bar grit is used for the second reinforcing member embedded in the surface layer of the reinforced soil structure, runoff, sinking, movement, etc. of the embankment material is suppressed, and the embankment material is compressed. It is easy to remove and has an excellent workability.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of a reinforced soil structure according to the present invention.

FIG. 2 is a perspective view of an embankment reinforcing member.

3 (a) and 3 (b) are perspective views of a reinforcing member.

FIG. 4 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 5 is a perspective view of an embankment reinforcing member.

FIG. 6 is a vertical sectional view showing a structure of a connecting portion of the upper and lower embankment reinforcing members.

7 (a), (b), (c), (d), (e), (f), (g) and (h) are vertical cross-sectional views showing a construction process.

FIG. 8 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 9 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 10 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 11 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 12 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 13 is a vertical sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 14 is a vertical cross-sectional view of an example of a conventional strong soil structure.

FIG. 15 is a vertical cross-sectional view of an example of a conventional strong soil structure.

FIG. 16 is a vertical cross-sectional view of an example of a conventional strong soil structure.

[Explanation of symbols]

1 ... Fill reinforcement member, 2 ... Fill material, 3 ... Reinforcement member, 4
... Embankment reinforcing member, 5 ... Connecting rod, 6 ... Reinforcing member, 7 ... Connecting member, 8 ... Reinforcing member, 9 ... Sheet for preventing sediment outflow, 10
... Embankment reinforcing member, 11 ... First reinforcing member, 12 ... Second reinforcing member, 13 ... Concrete block, 14 ... First reinforcing member, 15
… Second reinforcing member, 16… Coupling member.

Claims (1)

[Claims] 1. A plurality of embankment reinforcing members, an embankment material filled in a back surface of the embankment reinforcing member, a plurality of layers embedded in the embankment material and connected to the embankment reinforcing member. In the reinforced soil structure including the reinforced member, the first reinforced member buried deep inside the reinforced soil structure as the reinforced member and the second reinforced buried in the surface layer portion of the reinforced soil structure. And a reinforcing bar grit for the second reinforcing member.