JP2002173926A - Revetment lining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal fitting for mutually connecting mats laid and juxtaposed on a face of slope by adhering stone masses on an upper surface. SOLUTION: The mats stuck with the stone masses are closely laid and juxtaposed on the face of slope, and mutual peripheral edge parts of the adjacent mats are connected at an almost specific interval by a connecting metal fitting 3. The connecting metal fitting 3 has a pair of upper and lower slender sandwiching plates 5 and 6, two bolts 7 are implanted at an interval in the lower side sandwiching plate 5, and a hole 8 for passing these bolts is bored in the upper side sandwiching plate 6. The tip of the bolts 7 is pointed in a conical shape so as to be capable of piercing through the mats 1. The peripheral edge parts 1a of the mutually adjacent mats 1 are superposed, the sandwiching plate 5 with the bolts is applied to under these parts, and the two bolts 7 are pierced from below the mats 1. Thus, the sandwiching plate 6 having the hole 8 is passed through the bolts 7 appearing on the mats 1, and a nut 9 is threadedly engaged with and fastened to the respective bolts 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revetment lining for covering a river or coastal dike to prevent scouring or collapse.

[0002]

2. Description of the Related Art In the past, revetment works were almost completely covered with concrete and cut off ecosystems. At the same time, construction is changing to mainly natural stone and wood. For example, a draft prevention mat is first laid on the slope of a river, and an iron wire basket (futon basket) or a wooden frame is placed on top of the mat, and cobblestone is stuffed into it. However, such a method requires stuffing stones at the site, so that the construction period is long and the construction cost is high. Also, the wire mesh and iron wire basket that you have set up will appear on the table,
Impair the natural landscape.

[0003] In view of this, the present applicant filed a prior patent application (Japanese Patent Application Laid-Open No. H11-256546) to closely adhere a stone block having a flat bottom to the upper surface of a water-permeable mat, We proposed seawall lining to cover the surface. In this one,
The revetment work can be performed simply by laying a mat, and if the stone blocks are of irregular shape, a landscape close to nature can be obtained. However, strings are used to connect adjacent mats, but this construction is very troublesome.

[0004]

SUMMARY OF THE INVENTION It is a main object of the present invention to improve the workability of a mat having a stone mass adhered to an upper surface.

[0005]

After the mat to which the stone blocks are adhered is laid on the ground, the peripheries of the mats are connected to each other so that there is no gap between the mats. An upper and lower two elongated holding plates sandwiching the
Consists of a plurality of bolts that are planted at intervals on the lower holding plate and have sharp tips to penetrate the mat, and nuts that are screwed and tightened to bolts protruding from the holes provided in the upper holding plate (Claim 1). In this one, the edges of the mats next to each other are overlapped, bolts are pierced from below,
After inserting the holding plate through the bolt, the nut is screwed tight.
By doing so, the adjacent mats are sandwiched between the upper and lower sandwiching plates, and do not shift from each other. In particular, the point of the bolt is sharpened, so you can easily penetrate the mat by applying the force by applying the tip of the bolt to the mat without making a hole in the mat. Excellent. The sharp point of the bolt is dangerous as it is, so after tightening the nut, cut it off with a cutting tool.

When the two holding plates are formed in a mountain shape when viewed in a transverse cross section (claim 2), the mats are more securely held between the mats and do not shift from each other. The same effect can be obtained even if a convex portion is formed on the facing surface of at least one of the two holding plates (claim 3).

In order to fix the mat to the ground, use is made of a pile whose rear part is bent in an inverted U-shape and whose tip and rear end are pointed. Such piles can be made inexpensively by bending steel rods used for steel bars, etc. In addition, the rear end of the pile is bent in a U shape and the rear end is sharp, so the rear end Penetrates the mat, the mat is firmly fixed to the ground, and does not turn up.

[0008] By the way, the stone mass adhered on the mat is
Conventionally, natural stones (eg, granite, andesite, and basalt) are used, but such natural stones having a diameter of several tens of centimeters are not available at low cost. In addition, mining a large amount of natural stone will cause considerable destruction of nature. Thus, the present applicant has succeeded in artificially producing a natural stone equivalent. The raw material is a molten slag which is separated from the molten metal and floated on the molten metal during the refining of minerals such as nickel and manganese. The molten slag is taken out of the furnace and cooled slowly in the atmosphere to crystallize the mineral. For crystallization, a temperature range of 1000 ° C. to 800 ° C. is particularly important, and the material is allowed to pass through this range over a long time of about 2 to 4 hours. The resulting rock is divided into desired sizes and used as stone. In addition, if the molten slag is put into a mold and gradually cooled, a stone having a desired shape such as a flat bottom is obtained, and the processing cost is reduced. The stone thus obtained has almost the same components, strength and the like as natural stone, and can be used without distinction from natural stone.

[0009] Molten slag is also obtained when incinerated ash produced when incinerating waste (industrial waste and household waste) is melted and rendered harmless. Incinerated ash contains harmful substances such as dioxins and heavy metals, and is a troublesome person that cannot be discarded as it is. This incinerated ash is used as a basicity adjusting agent (dolomite, limestone, shell, etc.) and a reducing agent (powder coke)
Together with an electric furnace to reduce and melt at a high temperature of about 1400 to 1500 ° C. As a result, the incinerated ash liquefies and becomes a magma-like state, and harmful substances such as dioxin contained in the ash are exposed to high temperatures, decomposed and vaporized, and collected.
Heavy metals (cadmium, lead, hexavalent chromium, etc.) in the incineration ash are separated from the slag and dissolved in the molten metal at the bottom of the furnace to be recovered. Thus, the detoxified molten slag is obtained. This molten slag can also be gradually cooled to a stone material as described above.

[0010] In short, an artificial stone obtained by taking molten slag out of a furnace and slowly cooling it can be used as the stone mass to be adhered to the upper surface of the mat (claim 5). The use of such artificial stones does not cause natural destruction due to mining of natural stones, and if mass-produced, there is a possibility that natural stones can compete with natural stones. Furthermore, if refuse incineration ash is used as the raw material of the molten slag, effective use of waste can be achieved, and both advantages are obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
The mat 1 for bonding is made by bonding a reinforcing net on top and a polyester non-woven fabric below. The eyes of the polyester non-woven fabric are so rough that soil can hardly pass through but moisture can pass through. , The reinforcement net,
It is made of a low elongation material such as aramid fiber or polyester fiber. The periphery 1a of the mat 1 is approximately 1
Fold it back at 0cm width, sew it and reinforce it.

The stone mass 2 adhered to the mat 1 has a diameter of 15 to
Natural stones of around 50cm (including cobblestone, split stone, field stone, etc.)
Is cut in half by a cutter, and its cut surface (plane)
2a is coated with an adhesive and attached to the mat 1. Stone block 2
Instead of natural stone, artificial stone obtained by gradually cooling molten slag as described above may be used. The stone blocks 2 are stuck almost densely over the entire surface of the mat except for the peripheral portion 1a.

Each mat 1 has a size of 2.0 × 1.5 m in length and width, and a weight of 300 to 1 when the stone mass 2 is attached.
It will be about 500kg. Transport is carried on pallets.

As shown in FIG. 2, the mat on which the stone blocks are stuck is laid out on the slope without any gaps, and the peripheral edges of the adjacent mats are connected with the connecting fitting 3 at substantially constant intervals. . As shown in FIG. 3, the connection fitting 3 has a pair of upper and lower elongate holding plates 5, 6, and two bolts 7 are planted on the lower holding plate 5 at intervals. The upper holding plate 6 has a hole 8 through which these bolts pass. The tip of the bolt 7 is pointed in a conical shape so that the mat 1 can be penetrated.

As shown in FIG. 4, the connecting bracket 3 is used in such a manner that the peripheral edges 1a of adjacent mats 1 are overlapped, and a clamping plate 5 with bolts is applied thereunder, and two bolts 7 are provided.
Through the bottom of the mat 1. In this way, the bolts 7 appearing on the mat 1 are passed through the holding plate 6 with the holes 8, and the nuts 9 are screwed into the bolts 7 and fastened. In this way, the two mats are firmly sandwiched between the upper and lower sandwiching plates 5 and 6 and connected. In order to more reliably hold the mat, the two holding plates 5 and 6 are not merely flat plates but may be formed in a mountain-shaped cross section as shown in the figure. It is also effective to form small projections 10 at intervals on the opposing surface of the holding plate. Since the bolt 7 has a sharp pointed tip and is dangerous, when the nut 9 has been tightened, the protruding portion of the nut is cut off using a cutter tool (dotted line in FIG. 4). If the tip is cut off in this way, the thread of the bolt is crushed at that portion, and there is also an effect of preventing the nut from falling off.

Next, a stake 11 is struck at a required position to fix the mat 1 to the ground. As shown in FIG. 5, the stake 11 is a metal rod with a sharp pointed tip, the rear part is bent into a U-shape 11a, and the rear end is sharpened like the tip. Such a pile is driven into the ground so as to penetrate the periphery 1a of the mat. Until the stake goes into the ground through the mat at the rear end,
Drive in. In this way, the mat is connected to the rear U-shaped part 11 of the pile.
The mat does not turn up from the ground because it is firmly held down by a. The number of piles is 1.
5 or 2 is fine.

FIG. 7 shows the revetment on which the mat is constructed in this manner. At the waterside, shingled gravel is laid on the mat, and the gap between the stone blocks is filled with the gravel. This makes it difficult for the individual stone blocks 2 to move, and increases the strength against the flow as a whole. In particular, in the riverbed portion, a parquet stone 12 is laid sufficiently thick on the mat in preparation for scouring. Above the waterside, cover the soil on a mat, and more preferably plant. The roots of the plant extend through and beneath the mat, so that the mat is firmly fixed to the ground. At the slope shoulder, a sufficient amount of cover soil 13 is placed on the mat so that the mat does not turn over.

In such a revetment, the stone blocks 2 are adhered to the mat 1 fixed to the ground by piles, and even if washed by running water, the stone blocks are not washed away and the slopes and riverbeds are washed. Protect from digging. The gravel packed between the blocks is also supported by the blocks and is not washed away. On the other hand, mat 1
Prevents the soil from being sucked out from between the stone blocks 2. When the mat is covered with the planting, the roots of the planting pass through the eyes of the mat 1 and extend into the soil, and the mat is firmly fixed to the slope, so that the seawall is further strengthened.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a mat to which a stone block is adhered.

FIG. 2 is a plan view and a cross-sectional view illustrating a construction state of a mat.

FIG. 3 is a perspective view of a connection fitting.

FIG. 4 is a sectional view of a use state of the connection fitting.

FIG. 5 is an elevation view of a pile.

FIG. 6 is a cross-sectional view showing a construction state of revetment lining.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mat 2 Stone block 3 Connection metal fitting (connection means) 5 Lower holding plate 6 Upper holding plate 7 Bolt 8 Hole 9 Nut 10 Convex part 11 Pile (fixing means) 11a U-shaped part of pile

Claims (5)

[Claims] 1. A revetment lining comprising a mat having a stone mass adhered to an upper surface thereof, means for joining peripheral edges of the mat laid on the ground, and means for fixing the mat to the ground. Means are implanted in the upper and lower two elongated holding plates sandwiching the mat and the lower holding plate at intervals.
A seawall lining, comprising: a plurality of bolts, each having a sharp tip so as to penetrate the mat, and a nut screwed into the bolt protruding from a hole provided in the upper holding plate. 2. When the two holding plates are viewed in cross section,
The revetment lining according to claim 1, wherein the revetment has a mountain shape. 3. The revetment lining according to claim 1, wherein a convex portion is formed on an opposing surface of at least one of the two holding plates. 4. The seawall lining according to claim 1, wherein the fixing means is constituted by a pile, and the pile is bent in an inverted U-shape, and not only the front end but also the rear end is pointed. 5. The revetment lining according to claim 1, wherein said mass of stone is made of artificial stone which has been taken out of a furnace and gradually cooled.