JPH0841841A - Sheet to arrest sand shifting - Google Patents

Abstract

PURPOSE:To obtain a sheet to arrest the sand shifting capable of being built quickly and simply on a back filling riprap section by attaching belt bodies having elasticity and rigidity at least on one side of the front side or the rear sick of a sheet main body. CONSTITUTION:A plurality of belt bodies 2 having elasticity and rigidity are attached on the front side of a sheet main body 1 formed of nonwoven fabric, etc., at appropriate intervals lengthwise of the sheet main body 1. After that, the sheet main body 1 is conveyed to a building site in a state to wind it up, and the belt bodies 2 are also rolled in when the sheet main body is wound up. Then, the sheet main body 1 fixes its open end to a levee body 1a constituted of a concrete caisson, etc., with a rivet hammer, and it is developed and built along a back filling riprap section 2a. According to the constitution, the belt bodies 2 are attached to the sheet main body, so that it can be very easily developed without being caught on back filling gravel by elastic force of the belt bodies 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand protection sheet laid on a backfill rubble portion of a reclaimed seawall.

[0002]

2. Description of the Related Art Conventionally, when burying a shore, as shown in FIG. 5, a levee body 1a made of concrete blocks and caisson is constructed along the reclaimed land on the sea, and the levee body 1a is reclaimed. The landfill revetment 3a is formed by forming the backfill rubble portion 2a on the side.

In such a reclaimed seawall, the top surface 4a of the backfilled rubble part 2a is prevented for the purpose of preventing the backfilled rubble part 2a from collapsing due to tidal currents and waves and the outflow of the landfill gravel to the sea side.
In addition, a means for laying the sandproof sheet 7a over the slope 5a and further over the seabed 6a is adopted.

As the sandproof sheet 7a, one made of synthetic rubber, vinyl chloride resin, or the like, or one made of non-woven fabric or canvas is used.

In particular, those using a base material such as non-woven fabric or canvas have many advantages such as being lightweight, convenient to carry, and inexpensive.

These sandproof sheets have a width of 7 m and a length of 20 m.
It is formed into a long length and is usually rolled into the laying site, but it is inferior in rigidity when it is formed from a thin base material such as non-woven fabric or canvas. It is difficult to handle because it drops.

Therefore, for example, as shown in FIG. 6, after being wound, it is folded into two or three and tightened with a rope 8a or the like.

Then, at the laying site, the rope 8a is unwound to fix the winding end to the bank 1a, and the back rubble 2
It is developed and laid along a.

However, the sandproof sheet 7a cannot be easily spread because it is soft and poor in rigidity and has a bending tendency during transportation.

Further, since the expanded sand-proof sheet 7a is bent at the bent portion, it is caught by the back-filled gravel forming the back-filled rubble portion 2a and prevented from spreading.

Therefore, the operator has to incline many times to get down on the slope 5a of the backfill rubble portion 2a having poor footing and lift and lay the sand-preventing sheet 7a, which is extremely inefficient. It was

Therefore, for example, a means is adopted in which the sand-proof sheet conveyed by being bent and bent is rewound using, for example, a rigid thin tube or thin rod as a core material, and is spread and laid along the backfill rubble portion 2a. ing.

However, re-winding the sandproof sheet wound at the time of laying on the core material requires a large work area, requires a lot of labor and time, and after the sandproof sheet is laid and laid, the core material is unrolled. There is a problem such as having to collect.

After laying the sand protection sheet on the backfill rubble portion, the sand protection sheet is subjected to wave pressure and wind pressure from the sea side passing through the gap between the dam body and the backfill rubble portion, or wave pressure and wind pressure on the landfill side. Works.

Therefore, there is a problem that the sandproof sheet laid on the backfilled rubble part is flared and peeled off or damaged. Especially, those based on non-woven fabric or canvas are lightweight and flexible, which is an influence. Easy to receive.

[0016]

It is difficult to lay thin sand-proof sheets such as non-woven fabrics and canvas that have been conventionally used on the backfill rubble part, and until the landfill sand is deposited after the laying. The point is that the space between them is extremely unstable.

[0017]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a structure in which a belt-shaped body having elasticity and rigidity is attached to at least one of the front surface and the back surface of a seat body. Further, in the above structure, a plurality of locking members for locking a heavy object are provided on the surface of the seat body at appropriate intervals.

[0018]

[Operation] When wound, due to the rigidity of the strip,
There is no inconvenience in transportation because the whole winding state is maintained without bending.

Further, when the sandproof sheet wound at the time of laying is spread, the band-like body having elasticity and rigidity imparts elasticity and rigidity to the sandproof sheet, so that the sandproof sheet is expanded without being bent when expanded.

By locking a heavy load on the locking member, the sandproof sheet is fixed to the backfill rubble portion.

[0021]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows one embodiment of the present invention.
For example, on the surface of the flexible sheet body 1 formed of a non-woven fabric or canvas having a thickness of about 1 mm, a width of 7 m, and a length of about 20 m, a width of 5 to 10 cm and a thickness of about 3 to 10 mm, such as a synthetic rubber material or chloride. A plurality of elastic and rigid strips 2 formed of a synthetic resin material such as vinyl resin are attached along the length direction of the sheet body 1 at appropriate intervals.

As the attachment means, conventionally well-known means such as welding, adhesion or sewing may be adopted, and, for example, means for inserting the belt-like body 2 into a bag-like portion (not shown) formed on the sheet body 1, Further, a mechanical means such as a stepper or a bolt and a nut can be used, and the means is not limited.

In this embodiment, like the conventional sandproof sheet, it is conveyed to the laying site in a wound state, but the strip 2 having rigidity when wound is also wound.

Therefore, even if it is lifted in the wound state, it does not bend, and it is possible to store and convey it as it is.

In this embodiment, like the conventional sand-proof sheet, the open end is fixed to the bank 1a (see FIG. 4) made of concrete block or caisson by an appropriate means such as a hammer, and the back side is fixed. It is developed and laid along the rubble stone portion 2a (see FIG. 4).

At this time, in this embodiment, since the belt-shaped body 2 having elasticity and rigidity is attached, the sheet body is very easily developed by the elastic force of the belt-shaped body 2 and the back rubble portion 2a (FIG. 4). (See also) is not caught in the backfill gravel.

As described above, according to this embodiment, it is possible to lay it in a wound and conveyed state without rewinding it like a conventional sandproof sheet, which is extremely convenient.

At the same time, in this embodiment, since the belt-like body 2 having elasticity and rigidity is attached to the seat body 1, the tensile strength is reinforced as a whole and the durability is also improved.

FIG. 2 shows a different embodiment of the present invention. Although the material and shape of the sheet body 1 and the strip 2 are the same, the strip 2 is attached in the width direction. different.

In this embodiment, since the band-shaped member 2 is attached in the width direction and the length direction, it is more rich in elasticity and rigidity as a whole, and exhibits more extensibility and tensile strength. Is something that can be done.

In each of the above embodiments, the belt-shaped body 2 has the same elongated shape as the sheet body 1, but
As shown in FIG. 3, the band-shaped body 2 may have a structure in which short ones are attached at appropriate intervals in the length direction.

In the case of this embodiment, the amount of the strip 2 used is small, which is economically advantageous.

Further, in the above-described embodiment, the strip 2 is attached to the front surface of the sheet body 1, but the strip 2 is attached not only to the front surface of the sheet body 1 but also to the back surface or both the front surface and the back surface. It goes without saying that the configuration may be changed.

FIG. 4 shows a different embodiment of the present invention. The overall structure is almost the same as that of the embodiment shown in FIG. 1, but the belt-like body 2 attached to the surface of the sheet body 1 is used.
In addition, for example, a plurality of locking members 4 formed of, for example, a short strip for locking a heavy object 3 such as a sand bag are arranged at appropriate intervals.

In this embodiment as well, since the strip 2 is attached, it does not bend even if it is lifted up in the wound state as in the case of the above embodiment, and it is conveyed as it is and the bank body as shown in FIG. It can be laid in 1a reliably and quickly.

After laying, the weight 3 is bound to the locking member 4 or locked through the locking member 4.

Therefore, in this embodiment, after the installation, the heavy load 3
The sheet body 1 can be reliably fixed to the back rubble rubble portion 2a (see FIG. 5) by being locked, and there is no concern that the sheet body 1 will come off due to waves or the like.

In this embodiment, the locking member 4 and the seat body 1
Although the case where the strip 2 is attached in the length direction is shown, it can be said that the same can be applied to the case where the strip 2 is attached in the state shown in FIGS. 2 and 3 (not shown). There is no end.

Further, in this embodiment, the locking member 4 is used as the belt-shaped body 2.
Since the structure is provided only in the above, since the belt-shaped body 2 to which the preliminary locking member 4 is attached can be attached to the seat body 1 by attaching the belt-shaped body 2 to the seat body 1, Very good work efficiency, but locking member 4
May be provided not only on the strip 2 but only on the seat body 1 or on both the strip 2 and the seat body 1.

Further, in this embodiment, the locking member 4 having a short strip-shaped end face Ω type is used, but the locking member 4 is, for example,
Other structures such as a rope may be used, and the weight 3 may also have another structure such as a block.

[0042]

INDUSTRIAL APPLICABILITY The present invention having the above construction is extremely easy to carry and handle by using a sheet body which is lighter and cheaper than synthetic rubber materials and synthetic resins such as nonwoven fabric and canvas.

In addition, since the belt-shaped body attached to the sheet body imparts rigidity and elasticity to the flexible sheet body, it can be simply spread on the back rubble portion toward the water bottom while being wound and transported. It is extended without bending.

Therefore, the backfilled rubble portion can be extended very quickly and surely without being caught by the backfilled rubble portion and the like.

Further, since the band-shaped body imparts appropriate rigidity and elasticity to the flexible sheet body, the tensile strength of the sandproof sheet is also enhanced. In addition, by providing a heavy material locking member on the surface of the seat body, the seat body is fixed on the back rubble part between the time of laying and the time of burying earth and sand, and it is also supported by waves. There is no worry of coming off.

[Brief description of drawings]

FIG. 1 is a partially omitted perspective view showing an embodiment of the present invention.

FIG. 2 is a partially omitted perspective view showing a different embodiment of the present invention.

FIG. 3 is a partially omitted perspective view showing still another embodiment of the present invention.

FIG. 4 is a partially omitted perspective view showing an embodiment in which a locking member is added to the embodiment shown in FIG.

FIG. 5 is an explanatory diagram showing an outline of a landfill seawall.

FIG. 6 is an explanatory diagram showing a conventional sandproof sheet conveyance state.

[Explanation of symbols]

 1 sheet body 2 strip 3 heavy object 4 locking member

Claims (2)

[Claims] 1. A sand-proof sheet, wherein a band-shaped body having elasticity and rigidity is attached to at least one of a front surface and a back surface of a sheet main body. 2. The sandproof sheet according to claim 1, wherein a plurality of locking members for locking heavy objects are provided on the surface of the sheet body at appropriate intervals.