JP3086874U - Revetment lining - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a metal fitting for bonding mats laid on a slope by bonding a stone block to an upper surface thereof. SOLUTION: A mat on which a stone mass is stuck is laid out on a slope without gaps, and peripheral edges of adjacent mats are connected with a connection fitting 3 at substantially constant intervals. The connection fitting 3 has a pair of upper and lower elongate holding plates 5 and 6, two bolts 7 are planted at intervals on the lower holding plate 5, and these bolts are mounted on the upper holding plate 6. There is a hole through which The tip of the bolt 7 is sharpened in a conical shape so that the mat 1 can be penetrated. The peripheral portions 1a of the adjacent mats 1 are overlapped, and a holding plate 5 with bolts is applied thereunder, and two bolts 7 are pierced from under the mat 1. In this way, the bolts 7 appearing on the mat 1 are passed through the holding plate 6 with holes, and the nuts 9 are screwed into the bolts 7 and fastened.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to revetment lining to cover rivers and coastal dikes to prevent scouring and collapse.

[0002]

[Prior art]

 In previous revetment works, the surface was almost completely covered with concrete and the ecosystem was divided, but recently, in order to preserve nature as much as possible, natural stone and natural stones were used instead of concrete. The construction is mainly changing to wood. For example, firstly, a suction-prevention mat is 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 long work time and high construction cost because it must be packed on site. In addition, the installed wire mesh or iron wire basket appears on the surface, which impairs the natural scenery.

[0003] In view of the above, the applicant for the present invention for utility model registration disclosed in a previous patent application (Japanese Patent Application Laid-Open No. H11-256546) a stone mass having a flat bottom formed on the upper surface of a permeable mat. We proposed revetment lining to cover the slope. In this case, revetment works can be performed simply by laying mats, and the use of irregularly shaped stone blocks can provide a landscape close to nature. However, strings were used to connect adjacent mats, but this construction was very troublesome.

[0004]

[Problems to be solved by the invention]

 The main purpose of this invention is to improve the workability of mats with stone blocks adhered to the upper surface.

[0005]

[Means for Solving the Problems]

 After laying the mat to which the stone blocks are attached on the ground, the peripheries of the mats are connected to each other so that there is no gap between the mats. The bolts are planted at intervals on the plate and the lower holding plate, and are screwed and tightened to a plurality of bolts with sharp tips to penetrate the mat and bolts protruding from the holes provided in the upper holding plate. It is composed of a nut (claim 1). In this method, the edges of adjacent mats are overlapped, bolts are pierced from below, the clamping plate is inserted through the bolts, and the nuts are screwed and tightened. By doing so, the adjacent mats are sandwiched between the upper and lower sandwiching plates, and are not displaced from each other. In particular, the point of the bolt is sharpened, so the bolt can be easily penetrated into the mat by applying the force by hitting the tip of the bolt against the mat without drilling holes in the mat. Is excellent. The sharp tip 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 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, a pile having a rear end bent in an inverted U shape and having a sharpened tip and a rear end is used (claim 4). Such piles can be made inexpensively by bending steel rods used for reinforcing bars, etc. In addition, the rear of the pile is bent in a U shape and the rear end is sharp, so The edge pierces the mat, the mat is firmly fixed to the ground and does not turn up.

[0008] By the way, the stones to be adhered on the mat are conventionally made of natural stones (eg, granite, andesite, basalt), but natural stones having a diameter of several tens of centimeters are inexpensive. Is not available. Mining a large amount of natural stone will cause considerable destruction of nature. Therefore, the applicant for the present utility model registration has succeeded in artificially producing a natural stone equivalent. The raw material is molten slag that is separated from the molten metal during the smelting of minerals such as nickel and manganese and floats on it. 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 it is necessary 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 can be obtained, and the processing cost can be 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 generated when incinerating garbage (industrial waste and household garbage) 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 put into an electric furnace together with a basicity adjusting agent (dolomite, limestone, shells, etc.) and a reducing agent (powder coke), and is reduced and melted 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 incinerated ash are separated from the slag and dissolved in the molten metal at the bottom of the furnace to be recovered. In this way, 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 the 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 the mining of natural stones, and if mass-produced, it may be possible to compete with natural stones in terms of cost. Furthermore, if refuse incineration ash is used as the raw material for the molten slag, effective use of waste can be achieved, which is both advantageous.

[0011]

[Embodiment of the invention]

 As shown in FIG. 1, a mat 1 on which a stone block 2 is adhered to an upper surface is a laminate in which a reinforcing net is placed on top and a polyester nonwoven fabric is placed below. The reinforcement net is made of a material with low elongation, such as aramid fiber or polyester fiber, so that moisture can pass through. The periphery 1a of the mat 1 is folded back at a width of about 10 cm and sewn to reinforce.

The stone mass 2 to be bonded to the mat 1 is a natural stone having a diameter of about 15 to 50 cm (cobble stone, split stone, field stone, or the like) bisected by a cutter, and its cut surface (flat surface) 2a And apply it to the mat 1. The stone block 2 may be an artificial stone obtained by gradually cooling the molten slag as described above, instead of the natural stone. The stone blocks 2 are adhered almost completely over the entire surface of the mat except for the peripheral portion 1a.

One mat 1 has a size of 2.0 × 1.5 m in length and width, and a weight of the stone mass 2 when attached is about 300 to 1500 kg. Transport is carried on pallets.

As shown in FIG. 2, the mat to which the stone blocks are attached is laid out on the slope without any gaps, and the peripheral portions of the adjacent mats are connected with the connection fitting 3 at substantially constant intervals. To As shown in FIG. 3, the connection fitting 3 has a pair of upper and lower elongated 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 adjacent peripheral portions 1 a of the mat 1 are overlapped, and a holding plate 5 with bolts is applied thereunder, and two bolts 7 are mated. 1 penetrate from below. In this manner, the bolts 7 appearing on the mat 1 are passed through the holding plate 6 having the holes 8, and the nuts 9 are screwed into the bolts 7 and fastened. In this manner, the two mats are firmly sandwiched between the upper and lower holding plates 5 and 6 to be connected. In order to more securely insert the mat, the two holding plates 5 and 6 are not simply 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 end 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 point, which also has the effect of preventing the nut from falling off.

Next, a stake 11 is hit at a required position to fix the mat 1 to the ground. As shown in FIG. 5, the stake 11 is a metal rod having a sharp pointed tip, the rear part is bent into a U-shape 11a, and the rear end is pointed like the tip. Such a pile is driven into the ground so as to penetrate the periphery 1a of the mat. The stake is driven in until the trailing edge also penetrates the mat into the ground. In this way, the mat is firmly held by the rear U-shaped portion 11a of the pile, so that the mat does not turn up from the ground. The number of piles per mat is 1.5 to 2 piles.

FIG. 7 shows the revetment on which the mat is constructed in this manner. At the waterside, a shingled gravel will be laid on the mat and the gap between the stone blocks will be filled with this gravel. In this way, each stone block 2 becomes difficult to move, and the strength against the flow as a whole increases. In particular, in the riverbed, a parquet stone 12 is spread thick enough 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 under 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 when 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, the mat 1 prevents the soil from being sucked out from between the stone blocks 2. If the top of the mat is covered with planting, the roots of the plant will pass through the eyes of the mat 1 and extend into the soil, and the mat will be firmly fixed to the slope, making the bank more revetment. Becomes

[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 sectional view showing 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 Connecting 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)

[Utility model registration 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 revetment 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 tip 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.