JP2002038446A - Sand prevention sheet and laying method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical sand prevention sheet and a laying method thereof by which a sand prevention sheet can be easily laid on the back face of a revetment in a deep water, a quay wall, etc., in a more stable condition. SOLUTION: In the sand prevention sheet 1, a counter weight 4 is fixed to a sheet 2 made of a nonwoven fabric or a span thread by a male Hook and Loop fastener 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandproof sheet which can be easily laid in close contact with an upper surface of a backwater or a backing stone installed on the back of a caisson wall, and a method of laying the sandproof sheet.

[0002]

2. Description of the Related Art In recent years, the installation depth of submerged landfills has tended to be deep, and caisson installation at large water depths and backing stones constructed on seawalls and backsides of quays are prevented from flowing out by ocean currents and waves. Therefore, laying a sandproof sheet is performed.

[0003] However, it is difficult to lay the sand-proof sheet on the bottom of the water in a stable state due to ocean currents or waves, and it is difficult to lay the sand-proof sheet in a stable state. was there.

Therefore, as described above, there has been a strong demand for the development of a method for laying a sandproof sheet stably and economically on the back of caisson, seawall and quay.

[0005]

SUMMARY OF THE INVENTION The present invention provides an economical sandproofing sheet and a method for laying the sandproofing sheet easily and more stably on the back surface of a seawall or a quay, particularly at deep water. .

[0006]

According to the present invention, there is provided a sandproof sheet in which a counterweight is fixed to a sheet made of non-woven fabric or spun yarn by a male hook-and-loop fastener. Sandbag using a sandbag, a concrete block or a reinforcing bar, and the method of laying the sandproof sheet further comprises a drum wound with a sheet of nonwoven fabric or spun yarn, and the counterweight with a male hook-and-loop fastener. The set drum is fitted to a sheet laying ship, and the seat and the counterweight with a male hook-and-loop fastener are simultaneously sent out from each drum, and the counterweight is fixed to the sheet by the bonding force between the male hook-and-loop fastener and the sheet, and the sheet is fixed. Laying on the bottom of the water The method is that a drum wrapped with a sheet of non-woven fabric or spun yarn is suspended from the sheet laying boat near the bottom of the water, and the sheet is sent out from the drum, laid on the bottom of the water, and with a male hook-and-loop fastener on the sheet Sending out the above counterweight from the sheet laying ship, fixing the counterweight to the sheet by the bonding force between the male hook-and-loop fastener and the sheet and laying it on the water bottom, and the method of laying the sandproof sheet of the present invention, A drum in which a sheet in which the above-mentioned counterweight is fixed by a male hook-and-loop fastener on a sheet made of non-woven fabric or spun yarn is hung from a sheet laying boat to a position near the water bottom, and the above-mentioned sheet is sent out from the drum, and the above-mentioned sheet is sent out. It consists of laying in.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a sandproof sheet and a method of laying the same according to the present invention.

FIG. 1 is a side view for explaining a sheet laying state according to a method for laying a sandproof sheet in one embodiment, and FIG. 2 is an enlarged plan view of a main part of the sandproof sheet used in FIG.

First, a sandproof sheet 1 shown in FIG. 2 is a male fastener 3 of a hook-and-loop fastener which is joined to a nonwoven fabric or spun yarn sheet 2 having the function of a hook-and-loop fastener by means of a hook related to a knife and a male. Thus, the counterweight 4 is fixed to the seat 2.

When the counterweight 4 is fixed to the seat 2 shown in FIG. 2, the male hook-and-loop fastener 3 is formed into a cylindrical shape, and the counterweight 4 is passed through the cylindrical fastener.
In addition, as the counterweight 4, in addition to a chain as shown in FIG. 2, an inexpensive material such as a wire rope, a sandbag, a concrete block or a reinforcing bar can be used.

When a wire rope is used for the counterweight 4, the male hook-and-loop fastener 3 is formed into a tubular shape, and the wire rope is passed therethrough.
When other counterweights 4 are used, a sandbag, a concrete block, a reinforcing bar or the like and the male hook-and-loop fastener 3 may be adhered to each other, or may be wrapped with the male hook-and-loop fastener 3 for use.

Next, in this embodiment of the method of laying the sand-proof sheet 1 of FIG. 2 on the upper surface of the backing stone 7 constructed on the back surface of the seawall or quay wall 8 of FIG. A drum 5 in which a spun yarn sheet 2 is wound into a roll and the counterweight 4 with a male hook-and-loop fastener 3
Is mounted on a sheet laying ship 9 and the sheet 2 and the male hook-and-loop fastener 3 are provided from each of the drums 5 and 6.
The counter weights 4 are simultaneously sent out respectively, and the counter weights 4 are bonded and fixed to the sheet 2 by the adhesive force between the male hook-and-loop fastener 3 and the sheet 2, and the sheet 2 is laid on the water bottom. In this case, the male hook-and-loop fastener is used. The counterweight 4 is automatically fixed to the sheet 2 by the joining force between the sheet 3 and the sheet, and the sheet 2 easily sinks due to the weight of the counterweight 4, and the sheet 2 adheres to the back of the backing stone 7 and becomes stable. Laying construction is possible.

In this case, as described above, a wire rope, a sandbag, a concrete block, a reinforcing bar, a stone, or the like can be used as the counterweight 4 in addition to the chain.

Next, although not shown, the drum 5 around which the sheet 2 is wound as described above is suspended from the sheet laying ship 9 to a position near the bottom of the water, and the sheet 2 is sent out from the drum 5, and the sheet 2 is discharged. After laying on the water bottom, the sheet 2
The counterweight 4 with the male hook-and-loop fastener 3 similar to that shown in FIG. 1 is sent out from the sheet laying ship 9 and the counterweight 4 is fixed to the sheet 2 by the bonding force between the male hook-and-loop fastener 3 and the sheet and laid on the water bottom. You can also.

Further, as shown in FIG. 3, a drum (not shown) wound in a roll shape with the counterweight 4 fixed to the sheet 2 by a male hook-and-loop fastener 3 from the sheet laying ship 9 It is suspended near the water bottom and placed, and the sheet 2 is sent out from the drum,
It can be laid as a sandproof sheet 1 on the bottom of the water. In this case, the portion of the counterweight 4 having the male hook-and-loop fastener 3 fixed to the sheet 2 becomes the upper surface of the counterweight 4 when the sheet 2 is wound into a roll. It is necessary not to join with the sheet 2 coming.

[0016]

According to the sand-proofing sheet and the method of laying the sand-proofing sheet of the present invention, the sand-proofing sheet can be easily laid in a stable state on the upper surface of the backing stone constructed on the back of a seawall or a quay wall. A counterweight, such as a chain, is automatically fixed to the sheet by the bonding force between the male hook-and-loop fastener and the sheet, and the sand-proof sheet sinks due to the weight of the counterweight and adheres tightly to the back of the backing stone, so it is laid stably. Is possible, and the counter weight is
Inexpensive materials such as wire ropes, sandbags, concrete blocks, reinforcing bars, and stones can be used in addition to chains, which is economical.

[Brief description of the drawings]

FIG. 1 is a side view for explaining a laying state of an embodiment according to a method for laying a sandproof sheet of the present invention.

FIG. 2 is an enlarged plan view of a main part of the sandproof sheet used in FIG.

FIG. 3 is a side view for explaining a main part of a sandproof sheet according to another embodiment of the laying method of the present invention.

[Explanation of symbols]

 1 Sand control sheet 2 Sheet 3 Male hook-and-loop fastener 4 Counterweight 5 Drum 6 Drum 9 Sheet laying boat

Claims (5)

[Claims] 1. A sandproof sheet in which a counterweight is fixed to a nonwoven or spun yarn sheet by a male hook-and-loop fastener. 2. The sandproof sheet according to claim 1, wherein a chain, a wire rope, a sandbag, a concrete block, a reinforcing bar, or the like is used as the counterweight. 3. A drum on which a sheet made of non-woven fabric or spun yarn is wound, and a drum on which a counterweight according to claim 1 or 2 provided with a male hook-and-loop fastener are set, are fitted to a sheet-laying ship, and the sheet is supplied from each drum. And a counterweight with a male hook-and-loop fastener is sent out at the same time, and the counterweight is fixed to the sheet by the bonding force between the male hook-and-loop fastener and the sheet, and the sheet is laid on the water floor. 4. A drum around which a sheet made of non-woven fabric or spun yarn is wound and suspended from a sheet laying boat near the bottom of the water, and the sheet is sent out from the drum, laid on the bottom of the water, and a male surface is placed on the sheet. 3. A method for laying a sandproof sheet according to claim 1 or 2, wherein the counterweight according to claim 1 or 2 with a fastener is sent out from a ship on which the sheet is laid, and the counterweight is fixed to the sheet by a bonding force between the male surface fastener and the sheet and laid on the water floor. 5. A drum in which a sheet in which the counterweight according to claim 1 is fixed on a sheet made of a nonwoven fabric or a spun yarn with a male hook-and-loop fastener is hung from a sheet laying ship to a position near a water bottom, and arranged. A method of laying a sandproof sheet to send out the above sheet from the drum and lay it on the water bottom.