JPH0718680A - Surface forming plate body for steep grade fill and execution method thereof - Google Patents

Abstract

PURPOSE:To provide a stable surface forming plate body preventing a surface plate from being toppled forward by the earth pressure from the back by laying a bottom plate protruded on the slope surface side nearly perpendicularly to the surface plate and having a through space. CONSTITUTION:A geo-grid material 4 made of a meshy object, for example, is laid from a fill end section 31 toward the depth. The first-stage surface forming plate bodies 1 are laid in series and fixed. The fill 3 is laid behind a surface plate 11 at its half height, then the fill 3 is laid at the height to the upper end of the surface plate 11. Next, the second-stage geo-grid material 4, surface forming plate bodies 1, and fill 3 are executed. At this time, the tip of the bottom plate 13 is mounted and connected to the connecting rod 12 of the first-stage surface plate 11, thereby the first-stage and second-stage surface forming plate bodies 1 are integrated. Trees are planted on small steps 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface forming plate for forming a stepped embankment surface in a steep slope embankment reinforced with a geogrid material in a layered manner, and a method for constructing the surface forming plate.

[0002]

2. Description of the Related Art Conventionally, a surface forming plate having an L-shaped cross section is erected at the end of an embankment, and the end of the L-shaped bottom plate and the upper part of the standing plate are mutually opposed. It was tightly tied and an embankment was placed inside the L-shape. The weight of the embankment above the bottom plate prevented the standing plate from being pushed outwards. However, for this purpose, if the bottom plate is not long enough, the weight of the embankment is small,
I couldn't prevent the standing plate from being pushed. In addition, when stacked in a stepwise manner, the surface forming plate bodies are independent for each step, and thus tend to become unstable. The present invention aims to overcome these drawbacks.

[0003]

According to the present invention, a surface plate in a substantially vertical direction and a front bottom plate which is substantially orthogonal to the lower end thereof and projects at least to the slope surface side are attached, and the front bottom plate is used for vegetation. The present invention is characterized in that a surface forming plate having a necessary vertical space is used.

[0004]

With this structure, it is necessary to apply a large rotational force to tilt the front plate forward. Therefore, the surface plate can be stabilized only by pulling it so as not to move forward. By stacking the plates in a stepwise manner, small steps can be formed, and by connecting the lower surface plate and the upper front bottom plate, the multistep plate members can be integrated and stabilized. By forming a large space in the front bottom plate,
It is desirable in the landscape because it can vegetate trees.

[0005]

Embodiment 1 An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an example of the surface plate 11 of the surface forming plate 1. A surface plate 11 having a shape in which a plurality of quasi-trees made of reinforced concrete and having a semicircular cross section are arranged in parallel is formed. Its size is about 1 meter high and about 2 meters wide. The connecting rod 12 is attached to the upper end of the back surface of the front plate 11.

FIG. 2 shows the bottom plate 1 of the surface forming plate 1.
3 is an example. Plates 14 made of glass fiber reinforced resin having a width of 3 cm, a height of 5 cm, and a length of a little less than 1 m are arranged in parallel at intervals of 50 cm, and the plate members 13 are attached at both ends to be integrated like a cage. It is a thing. Of course, they may be integrally formed in advance. A wide vertical space 15 is formed between the plate members 13.

FIG. 3 shows a surface forming plate 1 in which a surface plate 11 and a bottom plate 13 are joined together. The front surface plate 11 is erected at a right angle on the bottom plate 13 with 50 cm left in front. The back side of the front plate 11 and the bottom plate 13 are brace bars 1
6 or connect with a brace to secure the joint. The height of the face plate and the length of the bottom plate in front of the front plate define the slope when installed. With the above configuration, the gradient can be freely determined to some extent by changing the length of the front bottom plate.

FIG. 4 shows the connector 2. A large number of hooks 21 projecting downward are attached in parallel along the bottom edge of the angle member 20 made of a long galvanized steel plate. Connection holes 22 at intervals of 10 cm on the vertical side
Is provided.

FIG. 5 shows a steep slope embankment. The geogrid material 4 laid on the embankment base 30 from the end 31 of the embankment to the back is made of fibers having extremely high tensile strength, and has a long flexibility of mesh 3 cm square and width 1 m. It consists of a net-like material. On the geogrid material 4, the first-stage surface forming plate bodies 1 are laid in series and fixed so that the tip of the bottom plate 13 is along the embankment end 31.

For fixing, as shown in FIG. 6, the upright side of the connecting tool 2 is applied to the rear end of the bottom plate 13 and fixed with a screw nail through the connecting hole 22. The hook 21 of the connector 2 is hooked on the weft thread 41 through the mesh of the geogrid material 4.

After the preparation as described above, as shown in FIG. 5, a 50 cm embankment 3 having a half height is formed on the embankment base 30 and behind the surface plate 11. The embankment is fully compacted using a roller tamper. Subsequently, the embankment 3 having a height up to the upper end of the surface plate 11 is performed.

When the embankment of the first layer is completed, the geogrid material 4 of the second layer is laid on the embankment of the first layer, and the surface forming plate 1 of the second stage is installed thereon. The surface forming plate 1 of the second step is erected 50 cm inside from the first step and is connected to the geogrid material 4 similarly to the first step. Further, the tip of the bottom plate 13 is placed on the connecting rod 12 at the upper end of the back surface of the first-stage surface plate 11 and is connected to each other using a large screw nail or the like.

As a result of this interconnection, the first and second surface-forming plate members are integrated, and the first-step surface forming plate member is provided with the second layer through the second-layer bottom plate. Since it is also connected to the geogrid material 4 of, it is possible to more strongly resist the earth pressure from behind.

After the preparation as described above, the second surface plate 1
Behind 1, the second layer of embankment 3 is constructed in the same manner as the first layer. In the same manner, the third and fourth step surface forming plates are installed and the third and fourth layers of embankment are constructed to complete a steep slope embankment having a stepped surface.

A narrow horizontal ground with a width of about 50 cm is formed on each step 5 of the formed stairs. No fine geogrid material is laid on the small steps, and there is a penetration space with a width of 50 cm.
Not only grasses and flowers, but also vegetation of trees such as small trees 6 is possible.

The surface forming plate is not limited to the embodiment as long as the horizontal bottom plate is attached to the substantially vertical surface plate. If there is a certain degree of rigidity such as net-like material, lightweight reinforced cement board, resin mortar board, glass fiber reinforced cement board, natural wood, etc., the material and shape are not specified. From the viewpoint of aesthetics, it is also an effective means to give the surface a pattern of artificial wood or artificial stone. In addition, a composite of materials using different materials may be used. Of course, the surface plate and the bottom plate may be integrally formed.

For example, it is also possible to use a composite plate body composed of three thin plates of aluminum / synthetic resin / aluminum which is lightweight and has high rigidity and corrosion resistance. As shown in FIG. 7, the four sides of the rectangular surface plate 11 made of the composite plate body are refracted to the back side with a narrow width to form the refraction pieces 17 on the four sides, respectively.
Providing connecting holes 22 in some places in the bending piece is convenient for joining with the bottom plate and for connecting adjacent plate members. This material has high rigidity because the bending pieces on the four sides act as ribs, and it is easy to connect up, down, left and right, and because it is lightweight,
The load applied to the foundation is small, making it suitable as a plate for surface formation.

The connection between the surface plate and the bottom plate is as shown in FIG.
Alternatively, a hook 18 having an upper opening may be attached to the back surface of the upper end portion of the surface plate 11, and the lower end of the tip of the upper bottom plate 13 may be inserted into this hook. It is convenient because it only needs to be inserted, and construction is simple, and there is some flexibility.

As shown in FIG. 9, the upper end of the surface plate and the geogrid material may be connected to each other. In this case,
A long mooring base material 3 such as a galvanized pipe on the geogrid material 4 at a position about 1 meter away from the lower end of the face plate
It is preferable that the mooring equipment 32 is attached to the upper end portion of the surface plate 11 by attaching the mooring equipment 2. This is because the tensile force of the entire geogrid material is transmitted to the mooring base material and the surface plate is firmly connected to the geogrid material 4. In this case, it is desirable that the bottom plate 13 is also tightly connected to the mooring base material 32. As a tool used for binding, if it has sufficient tensile strength and durability in the soil,
The material and shape can be freely selected, but for example, a binding rod 34 with a turnbuckle 33 in the middle is suitable.

As the anchor material, the geogrid material has been described as a representative, but as long as it has sufficient tensile strength to withstand the sliding failure of the embankment, it is not necessary to limit it to a mesh made of high strength fibers. It may be non-woven fabric, wire mesh, steel plate, or the like. Further, the shape thereof may be a sheet-like one laid on the entire surface or a belt-like one.

[0021]

Since the present invention is constructed as described above, it has the following features. Since the bottom plate projects in front of the front plate, it is difficult for the front plate to fall forward due to earth pressure from behind. It is even more difficult if the upper edge of the face plate is tightly bound to the anchor material. Since the bottom plate projects forward, by connecting the lower surface forming plate and the upper surface forming plate,
The surface forming plate can be integrated and has high stability. If the surface plate and the bottom plate are provided as separate members, the gradient can be changed depending on the connecting position, which is convenient. A large vertical space is provided on the bottom plate of the small step, so vegetation of grass and trees is possible. Conventionally, concrete products were used for vertical walls, but since they were heavy and difficult to construct, it was necessary to make a strong foundation. According to the present invention, since the surface forming plate can be made light in weight, the construction is simple and a strong foundation is not necessary, which is convenient.

[Brief description of drawings]

FIG. 1 is a perspective view from the back side showing an example of a surface plate.

FIG. 2 is a plan view showing an example of a bottom plate.

FIG. 3 is a side view showing an example of a surface forming plate.

FIG. 4 is a perspective view showing an example of a connecting tool.

FIG. 5 is a side cross-sectional view showing an example of a construction state of a surface forming plate body.

FIG. 6 is a side sectional view showing an example of a method of connecting the surface plate and the geogrid material.

FIG. 7 is a rear perspective view showing an example of a surface plate.

FIG. 8 is a partial side cross-sectional view showing an example of a method for connecting a front plate and a bottom plate.

FIG. 9 is a side view illustrating a method of connecting the surface plate and the geogrid material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface forming plate 11 Surface plate 12 Connecting rod 13 Bottom plate 14 Plate material 15 Through space 16 Brace bar 17 Refraction piece 18 Hook 2 Connecting tool 20 Angle material 21 Hook 22 Connecting hole 3 Embankment 30 Embankment base 32 Mooring base Material 33 Turnbuckle 34 Bonding rod 4 Geogrid material 41 Weft thread 5 Kodan 6 Small tree

Claims (5)

[Claims] 1. An anchor material having a high tensile strength such as a geogrid material is laid in a layer in a substantially horizontal direction, a plate for surface formation is erected at an end portion of the embankment, and an embankment is performed behind the plate. In the construction of the sloped embankment, a substantially vertical surface plate, and the lower end thereof is substantially orthogonal, and a front bottom plate protruding at least to the slope surface side is attached, so that vegetation is possible on the front bottom plate,
A plate body for forming a surface of a steep slope embankment, characterized by having one or more vertical penetrating spaces. 2. The plate body for forming a surface of a steep slope embankment according to claim 1, wherein at least one of the through spaces has a size necessary for vegetation of woody plants. 3. The rear bottom plate is also provided so as to project from the lower surface of the lower surface of the front plate.
The plate body for forming a surface of a steep embankment as described above. 4. The surface of a steep slope embankment according to claim 1, wherein the connection between the front bottom plate and / or the rear bottom plate and one of the front bottom plates and the surface plate is reinforced by braids. Forming plate. 5. The first layer of geogrid material is laid horizontally on the embankment base, and the first-stage surface-forming plate is erected at the end of the embankment, and the lower end and / or upper end of the plate is formed as described above. After connecting directly or indirectly to the first layer geogrid material,
The first layer embankment is performed behind the face plate to the height of the face plate, then the second layer geogrid material is laid on the first layer embankment, and the second surface formation plate is Also standing up a predetermined distance rearward, connected to the second layer of geogrid material, the front bottom plate of the second-stage surface forming plate is connected to the upper end of the first-stage surface forming plate, or, Without connecting, the second layer embankment is performed on the back side of the second-stage surface forming plate body, and thereafter, while similarly installing the third- and fourth-stage surface forming plate bodies in a stepwise manner, A method for constructing a steep slope embankment using the surface forming plate according to claim 1, wherein the third and fourth layers of embankment are performed on the back surface side.