JP2533217Y2 - Soil drainage - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage material for retaining soil used for stable protection of a slope.

[0002]

2. Description of the Related Art Conventionally, in order to stabilize and protect a slope, a porous concrete block frame is assembled along a slope in a grid-like manner so as to form a communicating groove, and is connected to a grid-like grid. The soil layer is formed in the frame, and vegetation is applied to it, and the water in the frame flows through the block,
Also, a synthetic resin as shown in FIG.
There are a number of technologies that combine the protection and drainage of slopes, such as making m-shaped plate-shaped plates, lining them along the slopes, and protecting the slopes as drainage for soil retention. is there.

[0003]

However, in recent years, sites for stable protection of slopes have often been located in mountainous areas, and heavy objects such as concrete blocks have been difficult to transport and are inconvenient to handle. In addition, since the deformed extruded plate-shaped plate is made of a synthetic resin such as polyvinyl chloride having a thickness of several mm, there is almost no problem with respect to weather resistance and rigidity, but it is heavy and has poor impact resistance. For this reason, there is a problem in that it is easily damaged during transportation and construction. In addition, there is a problem that connection on a slope having a curved surface is difficult with the deformed plate.

The present invention has been made in view of the above problems, and has as its object to provide a drainage material for soil retaining which is lightweight, easy to transport, easy to handle, and sufficiently satisfactory in drainage function.

[0005]

According to the present invention, there is provided a drainage material for retaining soil, wherein a bulky sheet having a large number of independent cup-shaped depressions formed on the surface or alternately on both sides is covered with a water-permeable cloth at least on the surface side. A gutter-like member capable of fitting the lower end portion of the sheet is provided at the lower end in the longitudinal direction of the sheet, a gripping plate for gripping the sheet is attached to the back side of the sheet, and a plurality of wires are fixed to the plate. It is something that has been done.

[0006]

The drainage material for retaining soil according to the present invention is a bulky sheet having a large number of independent cup-shaped depressions formed on the surface or on both sides, and the surface is covered with a permeable cloth. Therefore, the drainage function is good, and the drainage is smoothly performed from the gutter-shaped member provided at the lower end in the longitudinal direction of the sheet.

Further, the bulky sheet has a high compressive strength in the thickness direction, so that the cup-shaped depression is not crushed by the earth pressure. And despite being a bulky sheet,
Since it is extremely lightweight, it is easy to transport and has good workability. In addition, since it has appropriate flexibility, it is easy to follow a curved place and is easy to construct.

[0008] Further, a gripping plate for gripping the sheet is attached to the back side of the sheet, and a plurality of wires are stopped by the plate, so that the wire can receive the wire against earth pressure. By changing the thickness and the number of wires, it is possible to cope with the soil properties and inclination angle of the slope.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show an embodiment of a drainage material for retaining soil according to the present invention.

In FIG. 1, A is a drainage material, 2 is a bulky sheet in which a large number of independent cup-shaped depressions are formed alternately on the front and back surfaces, and is a high impact-resistant synthetic material such as polyethylene or polypropylene. It is formed by molding a thin resinous sheet.

FIG. 3 is a perspective view of the sheet 2 in a state where the sheet portion is taken out, and reference numeral 21 denotes a cup-shaped depression. The sheet 2 is formed by hot-pressing such that cup-shaped depressions are formed vertically and alternately from a central position 11. The front side or the entire surface of the sheet 2 is covered with a water-permeable cloth 3 such as a nonwoven fabric or a woven cloth, so that earth and sand do not directly enter into the depressions 21 of the sheet 2. Nonwoven fabrics and the like are made of natural fibers or synthetic fibers. The size of the sheet 2 is not particularly limited, but in consideration of strength, ease of handling, and the like, a width of 30 to 100.
cm, length of 10 to 30 m, about 1 to 3 cm from the bottom of the cup-shaped depression to the center position.

In FIGS. 1 and 2, a gutter-like member 6 is provided at a lower end of the sheet 2 in the longitudinal direction. The gutter-shaped member 6 is substantially U-shaped, the lower part 61 is wide and the upper part 62 is narrow, and the lower end part of the sheet 2 covered with the water-permeable cloth 3 is fitted from the narrow opening of the upper part 62. The water that has passed through the water-permeable cloth 3 flows down along the sheet 2, gathers at the gutter-shaped member 6, flows through the gutter-shaped member 6 in a predetermined direction, and is discharged.

Further, the gutter-like member 6 protrudes largely to the front side as shown in FIG. 1, and the flow path is mainly formed on this front side. This is because, in the relationship between the drainage material A and the pile, which will be described later, the drainage material A is attached in contact with the pile, so that if the protruding portion of the gutter-like member projects on the back surface, it becomes an obstacle.

In FIG. 1 and FIG. 2, the sheet 2 and the water-permeable cloth 3 surrounding the sheet 2 are sandwiched from above and below by a holding plate 4. The gripping plate 4 grips the sheet 2 at intervals of about 50 to 100 cm, and is formed of a metal or synthetic resin molded product. Further, as shown in FIG. 2, a protruding engagement portion 41 is provided on the back surface for stopping the wire 5.
The projecting engagement portion 41 is for attaching the wire 5 to the gripping plate 4, and the shape and the attaching means thereof are not particularly limited, and known means may be used. Also, the means by which the gripping plate 4 grips the sheet 2 is not limited to that shown in this embodiment, but it is essential that the plate 4 is firmly attached to the sheet 2. The wire 5 is a steel wire or a wire rope that has been subjected to a rust-proof treatment, and any wire having a high tensile strength can be used.

Next, a method of applying the drainage material A for retaining soil according to the present invention will be briefly described.

FIG. 4 is a sectional view of the slope showing a state in which the drainage material A of the present invention is applied to the slope. The piles 50 are driven into the slope at predetermined intervals, the drainage materials A are arranged so that the front side faces upward of the slopes, and the drainage materials A are arranged so that the back surface of the drainage materials A contacts the piles 50. Then, the wire 5 attached in advance is fixed to the stake 50.

FIG. 5 is a sectional view showing a state in which the drainage material A is fixed to the pile 50. The pile 50 may be a steel material such as wood, a steel pipe, an angle or a channel, but it is necessary to perform a sufficient rust prevention treatment. In FIG. 5, the wire 5 attached to the back surface of the drainage material A is fastened by hook bolts 51 and nuts 52, and the drainage material A is firmly fixed to the pile 50. After the drainage material A is attached to the pile 50 in this way, the soil 60 is laid on the slope blocked by the drainage material A, and vegetation is formed thereon.

The slope thus constructed is such that when rainwater or the like soaks into the soil 60, the water flows downward, and when it reaches the drainage material A, it passes through the water-permeable cloth 3 and the sheet 2 If the gutter-shaped member 6 is allowed to communicate with a vertical pipe (not shown) through the recess, water collected in the gutter-shaped member 6 is discharged to the side water or the like through the vertical pipe. You.

[0020]

[Effects of the Invention] As is clear from the above description, the drainage material for retaining soil according to the present invention is lightweight, easy to carry, and has good drainage performance because it is a shaped article having a large cup-shaped depression. It has an excellent effect of firmly stopping the runoff of embankment due to rainwater. In addition, the present invention has an advantage that a holding plate for holding a sheet covered with a water-permeable cloth is provided, and the plate can be used on a curved slope by supporting the plate with a wire. Moreover, since a gutter-shaped member is provided at the lower end of the sheet, drainage flows smoothly and rainwater does not stagnate for a long time in the embankment, so that excessive load is not applied to drainage materials and piles, It has a remarkable effect that the slope is less likely to collapse due to a large amount of rainwater.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a surface of a drainage material for retaining soil according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a back surface of the drainage material.

FIG. 3 is a perspective view showing an example of a sheet and a water-permeable cloth used in the present invention.

FIG. 4 is a cross-sectional view showing a state in which the drainage material for retaining is constructed according to the present invention.

FIG. 5 is a cross-sectional view showing an example of a state where the drainage material for soil retention of the present invention is fixed to a pile.

FIG. 6 is a perspective view showing a conventional earth retaining material.

[Explanation of symbols]

 A Drainage material for soil retention 2 Sheet 3 Water-permeable cloth 4 Grip plate material 5 Wire rod 6 Gutter-shaped member

Claims (1)

(57) [Scope of request for utility model registration] 1. A bulky sheet having a large number of independent cup-shaped dents formed on the surface or alternately on both sides thereof is covered at least on the front side with a water-permeable cloth, and the lower end portion of the sheet is attached to the lower end in the longitudinal direction of the sheet. A drainage material for retaining soil, wherein a gutter-like member capable of being fitted is provided, a holding plate for gripping the sheet is attached to the back side of the sheet, and a plurality of wires are stopped by the plate.