JP2648879B2 - Embankment reinforcement structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reinforcing structure for reinforcing and stabilizing an embankment in a railroad track, a road, a residential land, or the like.

[Conventional technology]

It has been widely practiced to embed a synthetic resin net or a metal net in the embankment to reinforce the embankment such as road and residential land development.

For example, long nets of squares and diamonds of thick strands extruded and formed using a thermoplastic resin such as polyethylene or polypropylene are embedded in the embankment to prevent collapse of the slope.

In addition, a net obtained by biaxially stretching a porous thick plate of a thermoplastic resin having a uniform thickness has also been buried in the embankment.

However, such a conventional reinforcing structure of an embankment using a synthetic resin net has the following problems.

[Problems to be solved by the invention]

When the long net made of synthetic resin having the extruded thick strand is used for reinforcing the embankment, the strand must be considerably thick, and especially the strand in the direction perpendicular to the slope is strongly. I needed to. However, this not only increases the overall weight of the net and increases material costs,
Since the strands are thick, they cannot be easily wound, and there is a problem that transport and handling are extremely inconvenient. In addition, a long net made of synthetic resin with a thick strand has a drawback that although its apparent tensile strength appears to be large, it is not stretched in practice but is extremely weak as compared with the stretched net.

In addition, a net obtained by biaxially stretching a porous plate of a thermoplastic resin has a very high tensile strength, but in order to manufacture the net, there is a problem that large-scale equipment is required,
Also, because it is biaxially stretched, it becomes a rigid thin plate or a slightly thick film, and when buried as a reinforcing material for the embankment, it may be difficult to adjust to the soil, pulling resistance is small and slips through the embankment There was a problem that it became easier.

[Means for solving the problem]

In view of various problems in a conventional extruded synthetic resin long net or an embankment structure using a biaxially stretched synthetic resin net, the present invention provides a special fiber net in the embankment. These problems have been solved by using. That is, in the present invention, the weft and the warp comprising the aggregate of the fibers are woven with a mesh size of 10 mm or more and 30 mm or less,
In addition, a resin-impregnated net of a woven cloth having wefts having dense portions at predetermined intervals is laid so that its length direction is orthogonal to the slope of the embankment, and the side opposite to the slope of the net. The present invention relates to a reinforcement structure for an embankment, which is capable of bolstering the structure of the soil and simplifying the burial work and transportation, etc., all at once by effectively winding the end of the embankment around a rod and anchoring it.

(Operation)

In the reinforcement of the embankment of the present invention, since an aggregate of fibers is used for the weft and the warp, its tensile strength is extremely large, and the mesh size is 10 mm or more and 30 mm or less. When buried, the soil on the top and bottom of the net is integrated and the soil is restrained by the mesh without dividing the soil vertically by the net. When the mesh size is 10 mm or less, the soil above and below the net is easily separated, and the upper and lower layers are separated by the net, causing problems such as slipping of the soil layer. In addition, when the mesh size is 30 mm or more, the tensile strength of the entire net becomes weak, and when used for reinforcing the embankment, it is not suitable because it cannot withstand the shearing force or the tensile force of the soil due to the collapse of the slope.

Further, the net of the present invention has a dense portion of the weft at predetermined intervals, and the raw material web is impregnated with resin, so that the shearing force applied to the net in the embankment is large due to the drawing force. Since the collapse does not occur and the net itself does not cause the strength deterioration, the reinforcing effect of the embankment is great.

Also, when the embankment collapses from the slope, the soil causes arc sliding, but if the net is not pulled out and the net resists the tensile force, it is considered that the embankment is unlikely to collapse.

Although the fiber net of the present invention has a very high tensile strength as described above, it is expected that the fiber net will be pulled out from the embankment because of its large strength. This prevents the net from being pulled out by anchoring it around the wire. In addition, since the net is wound around the rod, the force applied to the net is evenly applied to the whole, so that the tensile strength of the net main body is exerted, and the reinforcing structure of the embankment is extremely excellent.

〔Example〕

Next, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is a sectional perspective view showing the structure of the embankment 2 according to one embodiment of the present invention. FIG. 2 and FIG. 3 are plan views each showing an embodiment of a net suitably used in the present invention.

In FIG. 1, FIG. 2 and FIG. 3, 1 is a net, and the length and width of the net are not particularly limited because they can be properly used depending on various conditions such as the soil characteristics of the embankment and the height. Usually, the length is about 20 to 25 m and the width A is about 2 m. In FIG. 2, a net 1 is a net in which weft yarns 2 and warp yarns 3 are tied and woven, and two weft yarns (2000d) of polyester filament are used, and the mesh portion 16 is tied and woven. The size is 10 to 30 mm square, and the inner size of the yarn can be used up to about 8 mm. Ears 15 and 15 'are provided at both ends in the width direction of the net 1.
It has a dense part of the warp.

Reference numeral 14 denotes a dense portion 14 of the weft, which is provided at predetermined intervals. The dense portion 14 is formed by increasing the number of wefts with respect to the mesh portion 16 and assembling them, so that each of them does not move or easily come off.
The width L of the dense portion 14 is desirably 10 mm or more.
The effect can be sufficiently exhibited if it is about mm. The dense portion 14 is provided at a predetermined interval D in the length direction. The length D can be used if it is in the range of 400 to 1500 mm, but is preferably 800 to 1200 mm.

The ears 15 and 15 'at both ends of the net 1 are increased in the number of warps 13 and are divided into two to form plain weaves in order to prevent the wefts 12 from fraying. In addition, a cloth (not shown) or the like may be sewn to prevent fraying of both ends. The width of such ears 15, 15 'and the fabric is about 5 to 10 cm.

The above woven web is processed with a polyvinyl chloride paste to prevent collapse.

FIG. 3 shows another embodiment of the civil engineering net according to the present invention, in which ordinary mesh portions 16 and ear portions 15, 15 'are the same as those in FIG. 12 is added and warp 13 is divided into two to make a plain weave. The woven web is processed with resin by passing between rolls.

In the net 1 used in the present invention, as a weft yarn other than the polyester fiber, a drawn yarn (twisting may be somewhat applied) or a twisted yarn of biweekly synthetic fiber filaments such as nylon and vinylon is used. The tensile strength of the woven net is determined by the type of fiber, the thickness of the yarn, and the weaving density.For example, polyester yarns have a tensile strength of about 5 to 8 g / d, so 100 yarns of 4000d are arranged per 100m. It has a tensile strength of 2-3 t / m. Moreover, this strength is further increased by resin impregnation. The resin impregnation is useful not only for reinforcement but also for providing a certain degree of rigidity, preventing blind spots, preventing fiber fraying, and the like.

The present invention weaves the warp yarn of the above fiber, lays the impregnated net all over the embankment as shown in Fig. 1, spreads out the soil on it, hardens it, and lays the net on it,
This is done several times to form the embankment. First
The fiber net 1 is laid on the ground X in the figure, and the slope 3
Is arranged so that the length direction of the net 1 is orthogonal to the end of the net 1, and the end of the net 1, that is, the end of the net 1, which is on the opposite side of the slope, is wound around the rod 4 and has a hook from above. It has been held down by anti. The rod 4 used in the present invention is usually a round material having a diameter of 5 to 15 cm or a square material having a side length of about 10 cm. However, a thinned material, a metal pipe, a metal rod, a synthetic resin rod, a thick plastic pipe, or the like can be used. In particular, the material, size, shape and the like are not limited.

In FIG. 1, in the cross section of the embankment, the broken line S is an assumed slip line, and when the net 1 is buried, the end of the net must be sufficiently farther than this. In the figure, P is the fixing length, and when the slope slides and collapses on the broken line S and the net 1, a strong shearing force acts, and a strong pulling force acts on the fixing length P portion. In the present invention, the net 1 is laid so that the length direction is orthogonal to the slope, that is, the warp is orthogonal to the slope, since the net 1 is subjected to a force causing the weft to collapse. is there. By laying in this manner, the net 1 of the present invention has dense portions of weft at predetermined intervals, so that even when the strong pulling force is applied, large collapse does not occur, and the net retains its original shape. Keep the original strength,
In addition, since the net of the present invention has a winding portion having a rod at the deepest portion and an anchoring portion, the soil can be strongly prevented from slipping.

FIG. 4 is a partially enlarged view of FIG. 1, and is a cross-sectional view showing a state in which the net 1 is wound around a rod 4.

FIG. 5 and FIG. 6 are illustrations showing an anchoring method, respectively, and FIG.
It is fitted to a hooked column 6 which stands vertically to the rod. In FIG. 6, the net 1 is wound around a rod 4 and the rod is fixed by a hooked anchor 7.

The anchoring in the present invention may be a method in which the net 1 is wound around the rod 4 and fixed, and the shape, method, and the like are not limited to those described above.

〔The invention's effect〕

According to the structure of the present invention, the net is a light fiber, easy to carry, and has a strong tensile force because the net is a convergent body of fibers. And since the mesh is 10 mm or more and 30 mm or less, the net restrains the soil with the mesh and at the same time hardly breaks even if a strong force acts on the net, and there is a dense portion of weft at predetermined intervals and Since the net is laid so that the length direction of the net is perpendicular to the slope of the embankment, when the slope is slipped, the strength deterioration of the net itself due to the collapse of the net and the slip of the soil are blocked in the dense part of the net. As a result, the embankment can be prevented from collapsing. Moreover, in the present invention, the innermost part of the net, that is, the end of the net opposite to the slope is wrapped around a rod, and since it is anchored, the net is pulled out even if a pulling force acts on the net. There is an effect that there is no such thing. Since the force applied to the net is wound around the rod, it does not become a local force and has a great advantage that the net is hardly damaged. Further, the present invention has a great merit that the net is a fiber and is impregnated with a resin, so that it has appropriate rigidity and flexibility, so that it can be easily wound around a rod and workability is very good. is there.

[Brief description of the drawings]

1 is a perspective view of a cross section of an embankment showing an embodiment of the present invention, FIGS. 2 and 3 are each an embodiment of a net used in the present invention, and FIG. 4 is an enlarged view of a main part of FIG. FIG. 5, FIG. 5 and FIG. 6 are perspective views each showing an anchoring. 1 ... net 2 ... embankment 3 ... slope 4 ... rod
12 ... weft, 13 ... warp, 14 ... dense part, 15, 15 '...
... ears.

Claims (1)

(57) [Claims] 1. A weft and a warp comprising an aggregate of fibers of 10 mm.
Above, woven with a mesh size of 30 mm or less, and the weft yarn is a resin impregnated net of a woven web having dense portions at predetermined intervals, so that its length direction is orthogonal to the slope of the embankment. An embankment reinforcing structure, wherein the embankment is laid, and the end opposite to the slope of the net is wound around a rod and anchored.