JPH0696855B2 - 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 soil structure using a metal mesh such as a metal grid as a surface material, and particularly, the inclination of the surface material can be easily adjusted, and the surface material is less likely to be deformed. Since the work speed is fast, workability is excellent, and since the structure of the surface material is simple, stress concentration is unlikely to occur at the connection point between the surface material and the reinforcement material, so the connection point is not easily destroyed and vegetation The present invention relates to a reinforced soil structure that can be easily transported.

[0002]

2. Description of the Related Art As a reinforced soil structure of this type, there has been known a structure in which a concrete panel or a U-shaped metal plate is used as a wall surface and a reinforcing material is connected to the wall surface.

In recent years, the greening of civil engineering structures has been required from the standpoint of landscape conservation, but the above-mentioned known structures cannot achieve such greening. In addition, the concrete panel described above is heavy and extremely poor in workability.

Further, a structure using a synthetic resin net as a surface material and a reinforcing material is also known. However, since the synthetic resin net is soft and easily stretched, the deformation is large and the self-sustaining property is small. Construction of structures is virtually impossible. It has also been proposed to use a metal mesh as a reinforcing material. This is, for example, a construction method in which a plate-shaped member is welded to the end of the expanded metal and the plate-shaped member is connected to the wall surface while being screwed with bolts. However, this method has a drawback that the structure is complicated and the bolts are easily broken when the bolts are not tightened sufficiently at the site, which makes work management difficult. Further, this method has a drawback that the wall surface is displaced as the embankment is performed, but the displacement cannot be adjusted.

Further, a method of using a member in which an upright surface material and a reinforcing material horizontally connected to the upright surface material are integrated is known. In this construction method, the member becomes larger as the cross section of the reinforced soil structure becomes larger, which makes it extremely difficult to manufacture, transport, and assemble the member at the factory.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to use a metal mesh such as a metal grid as a surface material for a reinforced soil structure, and connect the reinforcing material to the surface material by means of pins to form a surface material. Stress concentration is unlikely to occur at the joints of the same person and the joint between the surface material and the reinforcing material, and is not easily destroyed. Also, mistakes are less likely to occur during connection during work, and the wall surface (surface material) is upright or at the time of construction. It is easy to adjust for shape retention and has excellent workability, and the surface material alone and the reinforcing material are manufactured separately, and they are assembled on site, so not only is they easy to transport but also easy to store. An object of the present invention is to provide a reinforced soil structure with improved drawbacks existing in the technology.

[0007]

In order to achieve the above-mentioned object, according to the present invention, a surface material is erected on the ground, and the reinforcing soil is connected to the surface material substantially horizontally with the ground. In a reinforced soil structure in which earth and sand are sprinkled on a reinforcing material to form an embankment layer, a ring piece is formed at the lower end and a surface mesh made of a metal mesh is formed on the upper end. To form a surface material by connecting the protrusions of the upper end of the single body located on the lower side to the meshes of the lower end of the single body located on the upper side so as to form a surface material, and via the ring piece. The reinforcing material is connected to the surface material.

[0008]

The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of a specific example of a surface material unit 1 made of a metal mesh forming a surface material according to the present invention, in which a horizontal reinforcing bar 2 and a vertical reinforcing bar 3 are crossed and an intersection 4 is formed.
Are connected to each other by welding or the like to form a metal mesh, and a ring piece 5 is formed at the lower end of the vertical reinforcing bar 3 and a protruding piece 6 is formed at the upper end thereof, or if necessary, the horizontal reinforcing bar 2 is formed.
It is configured by forming ring pieces 5, 5, ... The ring pieces 5, 5 ... 5 are formed, for example, by bending the lower ends and the left and right ends of the reinforcing bars 2 and 3 into a circular shape and welding the contact points at the tips to the reinforcing bars 2 and 3. Further, the protruding piece 6 is formed by bending the upper end portion of the reinforcing bar 3 into, for example, a dogleg shape, but the shape is not necessarily limited to the dogleg shape, and as will be described later, it may be formed between metal meshes. Any shape may be used as long as the movement is restrained when it is protruded.

FIG. 2 shows the surface material unit 1 of FIG.
The front view in the state where the comrades were connected is shown. In this connection, the ring pieces 5 and 5 at the end portions which are adjacent to each other on the left and right are overlapped, and the pin 7 is inserted into the hole of the ring pieces 5 and 5 formed therein.
By inserting.

FIG. 3 is a plan view of a concrete example of the reinforcing material used in the present invention, in which the mesh reinforcing material (metal grid) is used.
8 is shown. This metal grid 8 is formed by combining iron vertical streaks 9 and horizontal streaks 10 in a mesh shape and fixing the intersecting points to each other by adjoining each other. Moreover, as shown in FIG. The ring piece 11 is formed so that the hole surface 11a of the ring portion (hole) and the surface of the metal grid 8 are perpendicular to each other. 4 (b) shows the ring piece 11 of FIG.
It is the partial top view seen from a.

FIG. 4 is a perspective view showing a state in which the upper and lower adjacent surface materials 1 and 1 of FIG. 1 are connected to each other to form a surface material 12, and a reinforcing material 8 is connected to the surface material 12. . The upper and lower adjacent surface material units 1, 1 are connected to each other by the protrusion pieces 6, 6, ... 6 on the upper end of the surface material unit 1 located on the lower side, and the mesh on the lower end portion of the surface material unit 1 located on the upper side. It is done by making it protrude from the back side between 13th. Further, the reinforcement member 8 is connected by inserting the pin 14 into the hole (ring piece) 11 formed at one end of the reinforcement member 8 and further inserting the pin 14 into the ring piece 5 of the surface material unit 1. .

A reinforced soil structure according to the present invention using the above-mentioned surface material simple substance 1, surface material 12 and reinforcing material 8 is shown in FIGS.
It is constructed by the construction procedure shown in. First, in FIG. 5, the surface material single body 1 is erected on the ground 15, and the reinforcing material 8 is horizontally connected to the ground material 15 as shown in FIG. A sheet 16 for preventing sediment loss from which seeds adhere is attached. Then
The embankment layer 17 is formed by spreading earth and sand on the reinforcing material 8 and rolling it. At this time, the surface material single body 1 may be tilted outward or may be upright using a temporary material (not shown).

Further, as shown in FIG. 6, the operation of FIG. 5 is repeated on the embankment layer 17 embankd according to FIG. 5 to form the embankment layer 18. The surface material units 1 and 1 that are vertically adjacent to each other are connected by projecting a projection piece 6 formed on the upper end of the lower unit body 1 between the meshes 13 at the lower end of the upper unit body 1 from the back side. Forming twelve. Furthermore, the embankment layer
The reinforcing material 8 on 17 inserts the pin 14 into the ring piece 5 at one end,
Further, the pin 14 is connected by inserting it into the ring piece 5 at the lower end of the surface material unit 1.

At this time, since the surface material 12 has rigidity, the surface material 12 can maintain its own linearity, and the upper and lower surface material units 1 and 1 project the projecting pieces 6 into the mesh 13 and through the pins 14. Since they are connected, it is possible to freely adjust the installation angle of the surface material 12 around the pin 14. That is, as shown in FIG.
The surface material simple substance 1 can also be tilted in the direction of, and conversely, the surface material simple substance 1 can be tilted in the direction of the dotted line A1. This means that in the conventional method of constructing a reinforced soil structure, the wall surface is displaced with the compaction of the embankment, and this displacement becomes larger as the wall height increases, and the displacement was difficult to adjust during construction. The present invention shows that the wall angle can be easily adjusted during the construction, and this displacement can be easily adjusted.

FIG. 7 shows the reinforced soil structure A according to the present invention when the surface material 12 is vertical, that is, when the wall surface is vertical, but the wall surface does not necessarily have to be vertical, and an inclined surface, a stepped slope Any shape can be easily constructed.

Although the intersection 4 is fixed by welding in FIG. 1, it does not necessarily have to be welded. For example, as shown in FIG. It is also possible to form the depressions 19 by recessing the intersections of the reinforcing bars in a concave shape, and to fix the depressions by interlocking these depressions. Further, the surface material simple substance 1 according to the present invention is not limited to the shape shown in FIG. 1, and for example, as shown in FIG. 9, a shape in which the lower end of the longitudinal reinforcing bar 3 is bent inward at a right angle. It doesn't matter.

In addition to the shape shown in FIG. 3 (a), the reinforcing member 8 has a rod-shaped tensile member having a triangular pullout resistor 20 at the tip as shown in FIG. 10 (a). The number may be 21, and in this case as well, although not shown, the other end has a ring piece. Further, as shown in FIG. 10 (b), it may be a rod-shaped tensile member 21 having a pressure bearing plate 22 fixed to the tip with bolts 23.

FIG. 11 is an application example of the present invention, showing a structure for constructing a vegetation base on a slope of a rock. In the figure, 24 is the original ground, 25 is the reinforcing bar or anchor inserted in the ground 24,
Alternatively, the lock bolt 26 is a cross beam and may be reinforced concrete or shaped steel, and fixes the end 8a of the reinforcing member 8. Such a structure of the present invention is constructed by arbitrarily adjusting the gradient of the surface material 12 according to the gradient of the ground foundation 24.

[0019]

According to the present invention described above, the surface material simple substance made of the metal mesh having the ring piece at the lower end portion and the protruding piece at the upper end portion is used, and the upper and lower adjacent members are placed on the lower side. Using a surface material formed by connecting the projection piece at the upper end of the unit between the meshes at the lower end of the single body located on the upper side by projecting from the back side, and connecting the reinforcing material to the surface material via the ring piece. Since it is configured by doing, it can be assembled by only inserting the pin at the site, does not require operations such as bolt tightening, has a strong structure, is a simple work, and is free from human error. It is unlikely to occur, so that construction management is simple, and because the structure is simple, it is difficult to be destroyed, the displacement of the surface (wall surface) is small, the inclination of the surface can be adjusted freely, and vegetation is also possible. Moreover, since it is separated into the surface material alone and the reinforcing material, it is easy to manufacture, transport, and handle on site.
Moreover, it has excellent workability.

In particular, since the surface material used in the present invention has a structure in which the reinforcing material is connected by a pin, the pin functions as a rotating shaft, and therefore the inclination of the surface material can be freely adjusted. The angle of is also freely adjusted around the pin, so that there is no unnatural stress, and the assembly is quick and easy.

[0021]

As described above, since the reinforced soil structure according to the present invention uses the metal mesh such as the metal grid as the surface material (wall surface), it is easy to adjust the inclination of the surface material and Since stress concentration is less likely to occur at the connecting part of the reinforcing material, it is less likely to be destroyed, and mistakes during connection during work are less likely to occur, and adjustments for upright surface materials (wall surfaces) or maintaining the shape of wall surfaces during construction It is an invention that is easy to use and excellent in workability, and is excellent in production, transportation, and workability, and is practically useful.

[0022]

[Brief description of drawings]

FIG. 1 is a perspective view of a specific example of a single surface material used in the present invention.

FIG. 2 is a front view of a surface material formed by connecting adjacent surface material units on the left and right.

FIG. 3 (a) is a front view of a specific example of the reinforcing material used in the present invention, and FIG. 3 (b) is a partial front view of a ring piece at the end of the reinforcing material.

FIG. 4 is a perspective view showing a state in which a reinforcing material is connected to a surface material.

FIG. 5 is a cross-sectional view of a procedure for constructing a reinforced soil structure according to the present invention.

FIG. 6 is a sectional view of a procedure for constructing a reinforced soil structure according to the present invention.

FIG. 7 is a sectional view of a specific example of a reinforced soil structure according to the present invention.

FIG. 8 is another specific example of longitudinal or horizontal reinforcing bars of the surface material alone according to the present invention.

FIG. 9 is a perspective view showing another specific example of a single surface material used in the present invention.

10 (a) and 10 (b) are plan views showing other specific examples of the reinforcing material used in the present invention.

FIG. 11 is a cross-sectional view showing an application example of the reinforced soil structure according to the present invention.

[Explanation of symbols]

 1 Surface material alone 2 Horizontal reinforcing bar 3 Vertical reinforcing bar 5 Ring piece 6 Projecting piece 7 Pin 8 Reinforcing material 11 Ring piece 12 Surface material 13 Mesh 14 pin 15 Ground 17 Fill layer 18 Fill layer 21 Bar-shaped tensile member A Reinforcement Earth structure

Claims (2)

[Claims] 1. A surface material is erected on the ground, a reinforcing material is connected to the surface material substantially horizontally with the ground, and earth and sand are spread on the reinforcing material to form an embankment layer, if necessary. In a reinforced earth structure constructed by repeating these operations, a ring piece is formed at the lower end, and a comrade that is adjacent to the upper and lower sides of a surface material unit made of a metal mesh with a protruding piece formed at the upper end is placed on the lower side. A surface member is formed by connecting the protruding piece of the upper end portion of the unit located above the mesh of the lower end portion of the unit located above so as to project from the back side, and the reinforcing material is provided on the surface through the ring piece. Reinforced earth structure connected to timber. 2. The reinforcing material is connected to the surface material by forming a hole at one end of the reinforcing material, inserting a pin into the hole, and inserting the pin into a ring piece of the surface material. Reinforced soil structure of 1.