JPH05272140A - Forming method for banking - Google Patents

Abstract

PURPOSE:To form a banking behind a base by standing a supporting wall and a surface plate with a material with rigidity and permeability and filling a shelf-state article to be formed through connecting with sediments and gravels so as to form the base. CONSTITUTION:A surface plate 11 with the perpendicular height of more than 50cm is stood along the line of toe of slope of a banking by forming a longitudinally-shaped body with a material with rigidity and permeability, and the adjoining surface plates are connected to each other. Then, a supporting wall 13 with the height of a rigid material of 25 to 35cm is stood on almost the plane of the surface plate 11 on the inside of the banking with a predetermined interval from the surface plate 11. Then, the surface plate 11 and the supporting wall 13 are connected to each other with a material with large tensile strength at a predetermined point to from a shelf-state article 1. Next, the shelf-state article 1 is filled with sediments and gravels to form a base, and banking is made behind the base. By this, work of filling the shelf-state article 1 is mechanized, efficiency is improved, and stable banking can be formed.

Description

Detailed Description of the Invention

The present invention relates to a method for forming embankments, especially steep embankments.

[0002]

[Prior Art and Problems] In order to form a reinforced embankment using geogrid material, a small sandbag is piled up to form an earthwork on top of the laid geogrid material and the embankment is placed on the back surface. It was Small sandbags are an effective material because they are familiar to the site and are inexpensive, but these days it becomes extremely difficult to secure workers who are engaged in simple labor at construction sites, and this effective sandbag packing process is extremely difficult. Has become expensive.

[0003]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a surface plate made of a rectangular sheet made of a material having rigidity and water permeability is placed along the slope of the embankment. Standing on the surface of the embankment, the adjacent surface plates are connected to each other, and a supporting wall made of a rigid material is erected substantially parallel to the surface plate inside the embankment with a predetermined distance from the surface plate. Are tied together at a predetermined location with a material with high tensile strength to form a shelf,
This shelf is filled with earth, sand or gravel to form an earthwork, and the back of the earthwork is filled with earth.

[0004]

According to the present invention, since a machine can be used for the work of putting the soil into the shelves, the efficiency is high, and the problem of securing workers for filling sandbags is solved.

[0005]

Embodiment 1 An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, a band-shaped surface plate 11 is formed by using a welding wire net made of galvanized iron wire as a material.
The upper end of the face plate is folded back by about 10 cm to be doubled, and an insertion gap 12 is formed between the face plate body and itself. The thickness of the iron wire is usually 5 to 8 mm, and the mesh of the wire mesh is usually 5 to 1
It is 0 mm. The short side in the vertical direction of the face plate is 30 cm, and the long side in the horizontal direction is 1 m. A band-shaped support wall 13 having substantially the same size as the surface plate is formed by using expanded metal as a material. The surface plate 11 and the support wall 13 are erected upright with a distance of 1 m between them, and they are tightly connected to each other by using two connecting rods 14 at the upper and lower sides and at the center, respectively, and a shelf shape at both ends. Form Object 1. The distance between the surface plate 11 and the support wall 13 is usually 50 cm to 1 m because the purpose is to form a stable mass of soil on the slope, and if the width exceeds 2 m, the connecting rod also needs to be long. Since the cost is also high, waste occurs.

As shown in FIG. 2, the foundation ground 2 for embankment
The geogrid material 3 is laid in parallel in a direction orthogonal to the slope line 21 above the ground. Geogrid material 3 should be laid outside the slope line about 2 m long. Along the upper slope line 21 of the geogrid material 3, the plurality of shelves 1 are placed with the surface plate 11 outside the slope, and the side ends of the shelves 1 are installed without leaving a gap between them. Adjacent shelves 1 are tightly bound together. When tightly connected, the connecting portion 15 at the side end of the surface plate 11
In order to form a flat surface without a step, an iron wire 16 having high rigidity is inserted into the insertion gap 12 formed on the back surface of the surface material. The geogrid material 3 and the surface plate 11 and the geogrid material 3 and the support wall 13 which are laid at the slope line 21
Tighten tightly with. The shelf-like article 1 formed continuously along the slope line 21 is installed.

As shown in FIG. 3, the soil 40 is filled in the shelf 1 formed at the bottom of the slope using a power shovel or the like to the upper end of the face plate. Although not restricted, it is desirable to fill the soil from the side of the support wall 13 when filling, in order to stabilize the shelf-like material. The filled soil 40 is sufficiently compacted using a compaction device such as a rammer roller. Hojiri line 2
A continuous earthwork 4 having a width of 1 m and a height of 30 cm is formed along the line 1. The soil to be filled is preferably sandy soil that has good water permeability and little consolidation deformation, but it may be soil generated at the site or gravel. Behind the embankment 4 formed on the buttock line 21 in this way, an embankment 5 is laid up to the height of the embankment. Firmly compact the embankment with a roller. Since the embankment height is 30 cm, it can be sufficiently compacted. If a vegetation mat 6 to which vegetation seeds are attached is attached to the surface of the surface plate 11, it is possible to prevent the soil from leaking from the mesh when embankment, and to green the formed embankment surface. It is convenient for

As shown in FIG. 4, the same method is repeated to form the embankment 5 having a total height of 60 cm. Height 60 cm
When the first layer embankment 5 is completed, the geogrid material 3 left over from the slope line 21 is wound up along the surface plate 11 and further wound on the embankment further in the back of the embankment 5. return. The surface plate 11 and the geogrid material 3 are tightly connected to each other in some places by using a connecting fitting or the like. The embankments 5 are successively formed on the formed first-layer embankments 5 in the same manner to complete the embankments having a predetermined height. In this case, since the face plate is vertical,
It is desirable to set the embankment of the upper layer slightly behind the embankment of the lower layer so that the embankment is set back stepwise.

As shown in FIG. 5, the connecting portion 15 at the side end of the surface plate 11 installed in the upper stage is located at the middle of the connecting portion 15 of the lower surface plate 11 so that the weak points of the connecting portion are not concentrated in one place. The phase is shifted so that it is located at. In addition, the upper and lower surface plates should also be firmly attached.

[0010]

[Embodiment 2] In the previous embodiment, the heights of the surface plate 11 and the support wall 13 are set to be the same, but as shown in FIG. 6, the surface plate 11 is set to a height of 1 m and the support wall 13 is made of soil. The shelf-like product 1 is formed by tightening the surface plate 11 to have a size of 25 cm suitable for rolling. Similar to the previous embodiment, the upper end of the surface plate 11 is double-folded by about 10 cm, and the lower end is bent by 20 cm to form the bottom plate 17. The included angle between the surface plate 11 and the bottom surface 17 is set at the same angle as the planned slope of the embankment. The lower end of the support wall 13 is also 10c
Bend it at a right angle, keep it stable and cheap on the embankment, and make it difficult to bend. The support wall 1 in the shelf 1 formed in this way
Soil 40 is filled to a height of 3 to form the first-step earthwork 4, and the first-step embankment 5 is performed behind the earthwork to the height of the earthwork. Next, the same surface plate 11 and the support wall 13 at the next stage are tightly connected to each other to form the shelf-like object 1, and the earthwork and embankment are formed by the same method. It is also possible to form the slope by the surface plate itself without winding the geogrid material on the surface of the surface plate by constructing the surface plate with a material with good outdoor durability, such as aluminum coated steel wire. is there.

Since the present invention is constructed in this way, it has the following features. (1) Since the shelves formed between the surface plate and the support wall have a wide opening, they can be filled with soil by using a machine and can be compacted by a machine, so that the work efficiency is very good. (2) When filling the soil, a force is applied to keep the surface plate outside, but the surface plate is not easily bent because it is pulled by the support wall embedded in the soil of the earthwork, and the flat sloped surface is formed. Can be formed. (3) Since the shelves are planned to have a height suitable for compaction of the embankment, a sufficiently compacted and stable embankment can be formed. (4) Since the surface plate can be made of a material different from that of the support wall and the connecting rod, it is possible to form a stable slope for a long period of time by forming the surface material with a material having high performance even though it is expensive. is there. (5) By folding back the edge of the surface plate in a double manner, the rigidity of the surface plate can be increased and a connecting rod or the like can be inserted in the double position.

[Brief description of drawings]

FIG. 1 is a side view of a shelf.

FIG. 2 is a side sectional view showing an installation situation of shelves.

FIG. 3 is a side cross-sectional view showing the construction status of the first layer of earthwork and embankment.

FIG. 4 is a side cross-sectional view showing a formation state of embankment.

FIG. 5 is a front view showing how the surface plate is installed.

FIG. 6 is a side cross-sectional view showing another example of the formation state of the embankment.

Claims (8)

[Claims] 1. A surface plate made of a rectangular sheet made of a material having rigidity and water permeability is erected at a predetermined angle so as to be along the slope line of the embankment, and adjacent surface plates are connected to each other. Then, a support wall made of a rigid material is erected substantially parallel to the surface plate on the inside of the embankment at a predetermined distance of 2 m or less from the surface plate, and the surface plate and the support wall are made of a material having a large tensile strength at a predetermined location. It is tightly bound to form a shelf on both sides, the earth and sand or gravel is filled in the shelf to form an earthwork, and the back of the earthwork is embanked. Forming method. 2. The height of the support wall is 25, which is suitable for compaction of soil.
The method for forming an embankment according to claim 1, characterized in that 3. A surface plate having a vertical height of 50 cm or more is used, and two or more stages of support walls are tightly connected to the same surface plate to form an embankment and an embankment. Item 2. The method for forming an embankment according to item 2. 4. The earthwork and embankment construction for the second or more layers are performed after the surface plate used for the layer is joined to the existing lower surface plate. Method of forming embankment. 5. An anchor material having a high tensile strength such as a geogrid material is laid substantially horizontally between the foundation surface of the embankment and the embankment layer, and the anchor material and the surface plate are tightly bonded to each other. The method for forming an embankment according to any one of claims 1 to 4. 6. A planar geogrid material is used as the anchor material, and the end on the slope side of the geogrid material to be laid in layers is left over, and this extra portion is moved upward along the surface of the embankment. The method for forming an embankment according to claim 5, characterized in that the embankment is wound up and tightly bound to the surface plate at a predetermined position. 7. The method for forming embankment according to claim 1, wherein the connecting points of the side edges of the surface plates which are vertically adjacent to each other are displaced in the upper and lower layers. .. 8. A vegetation paper / vegetation mat having vegetation seeds is attached to the surface plate.
8. The method for forming an embankment according to claim 7.