JP2000204532A - Revetment cage and multi-layer type revetment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit to perform revetment lining having a stable strength by installing wire netting at the front portion and side portion of box-shaped concrete frame bodies and attaching suction prevention sheets to the rear surface portion and bottom surface portion of the bodies. SOLUTION: Suction prevention sheets are attached to the rear surface portions and bottom surface portions of rectangular parallelepiped box-shaped concrete frame bodies and also wire netting 2 to the front portions, rear surface portions and bottom surface portions respectively. In addition, a flat lid is projected out at the front surface portion thereby forming a rectangular parallelepiped revetment cage 5; a plurality of cages 5 are connected together with coupling fittings and the inside of each cage 5 is filled up with stone 6. The cages are stacked and gradually set back as the number of the cages stacked increases. Next, rectangular front surface frames, partition frames and rear surface frames of the box-shaped frame bodies are mutually connected with coupling fittings, and the main reinforcement and reinforcing bars are arranged in the concrete frame bodies. Then, a plurality of revetment cages 5 are coupled with coupling fittings at the shore line of a river or the like, and lining work is performed on the top of the cage as required. In this way, the rigidity and strength can be greatly increased compared to iron wire cages.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage revetment structure mainly constructed using natural stones such as boulders and boulders, and a revetment basket used for the structure.

[0002]

2. Description of the Related Art Up to now, as a revetment method for lining a shore such as a river or a lake, for example, a revetment method of constructing a revetment wall by stacking a plurality of iron wire cages while stuffing a middle stone such as a natural stone therein. It has been known.

[0003] This revetment method involves lowering the riverbed, local scouring,
It has the flexibility of eroding from the top of the revetment, sliding on the ground behind, and even soft ground.It also has gaps that make it suitable for the inhabitation and growth of living organisms, and can be revegetated by covering soil. It is widely used in recent years because it is suitable for creating natural rivers and as a measure to reduce construction costs.

[0004]

However, since iron wire cages are generally inferior in both rigidity and strength, they can easily be deformed even if they are hit by filling stones. Not only was it difficult, but also over the years, the iron wire cage corroded and could break down, leading to collapse of the revetment.

[0005] For this reason, it is necessary to appropriately reinforce with a reinforcing bar or a steel material which is thicker than the iron wire, so that extra labor and reinforcement work are required, and a cost increase is unavoidable. The present invention has been made in order to solve the above-described problems, and in particular, to provide a multi-stage stacked revetment structure that enables stable and stable revetment lining and a revetment cage used for the revetment structure. With the goal.

[0006]

According to a first aspect of the present invention, there is provided a revetment car comprising a concrete box-shaped frame formed by forming a concrete box-shaped frame. Are formed by attaching a wire mesh to the front and side portions of the above, and a suction prevention sheet to the rear and bottom portions, respectively.

[0007] By forming in this manner, particularly since the box-shaped frame is made of concrete, both rigidity and strength are large, and there is no possibility of easy deformation. Also, with the passage of time, even if a part of the wire mesh breaks, the shape of the box-shaped frame is still maintained,
There is no danger of causing total collapse. Therefore, a revetment structure that is extremely stable in strength can be constructed.

According to a second aspect of the present invention, in the revetment cage according to the first aspect, a front frame, a partition frame, and a rear frame formed respectively in a rectangular shape are connected to each other by a plurality of connection fittings to form a box-shaped frame. As a result, a box-shaped frame having a required size can be formed very efficiently.

According to a third aspect of the present invention, in the revetment cage according to the first or second aspect, an anchor portion is provided around the wire mesh, and the anchor portion is fixed to a reinforcing bar embedded in the concrete of the box-shaped frame. The wire mesh can be securely and firmly attached to the box-shaped frame.

According to a fourth aspect of the present invention, there is provided a multi-level seawall type revetment structure, wherein a plurality of the revetment cages according to the first, second, or third aspect are connected to each other by a connecting metal fitting and are filled with filling stones. By stacking, seawall structures of the required scale can be constructed.

According to a fifth aspect of the present invention, in the multi-stage stacked revetment structure of the fourth aspect, a relatively steep revetment structure can be stably constructed by stacking the revetment cages while gradually retreating them.

[0012]

1 to 4 show an embodiment of the present invention. In FIG. 1 to FIG. 4, a suction preventing sheet 3 is provided on the back and bottom of a rectangular box 1 made of concrete.
Are attached to each other, a wire mesh 2 is attached to each of the front surface and the left and right side surfaces, and a flat lid 4 is protruded substantially horizontally on the front surface. In this way, a rectangular revetment basket 5 is formed.

A plurality of revetment baskets 5 are connected to each other by connecting metal fittings, and are packed with natural stones such as boulders and cobblestones or stuffed stones 6 such as crushed stones, and are further gradually retracted and stacked. A revetment structure has been constructed.

The box-shaped frame 1 is formed by connecting a front frame 7, a partition frame 8 and a rear frame 9 each having a rectangular shape to each other with a plurality of U-shaped connecting fittings 10. . Each of the front frame 7, the partition frame 8 and the rear frame 9 is a rectangular frame made of reinforced concrete in which a main reinforcing bar 11 is arranged as reinforcement in concrete or fiber reinforced concrete in which fiber reinforcing material such as carbon fiber is mixed in concrete. Is formed.

Reference numeral 14 denotes a front frame 7 and a rear frame 9 and, if necessary, a partition frame 8 which is attached at predetermined intervals as a reinforcing material between the upper frame and the lower frame.
Reinforcing bone made of reinforcing steel. Both ends of the reinforcing bone 14 are welded to the main bar 11.

Reference numerals 15 and 16 denote connecting fittings and connecting bolts for connecting the front frame 7 and the partition frame 8 and the partition frame 8 and the rear frame 9 more firmly, respectively. The connection fitting 15 is formed in a substantially L-shape, and is attached to each corner of the connection part. The connection bolt 16 is screwed from a bolt hole (loose hole) of the connection fitting 15 to an insert embedded in concrete of each member.

The front frame 7 and the partition frame 8 thus formed,
Each of the partition frame 8 and the rear frame 9 is inserted into a connection hole 12 formed at a predetermined depth in a corner portion, and one leg 10
a, respectively, and are integrally connected by filling a mortar or a coagulant 13 around them.

At this time, by connecting the intermediate portion in the same manner, the integration of the connection portion can be further improved. The wire mesh 2 is attached to the outside of the front frame 7 and the partition frame 8, respectively. At this time, the wire mesh 2 is formed by bending the peripheral edge thereof at substantially right angles around the periphery to form an anchor portion 2a, burying the anchor portion 2a in the concrete of the front frame 7 and the partition frame 8 and attaching the anchor portion 2a to the main reinforcement 11 in the concrete. It is fixed by welding.

The wire mesh 2 is made of a zinc-aluminum alloy-plated iron wire to prevent corrosion. Further, in particular, for the wire mesh 2 of the front frame 7, for example, a wire mesh of 65 mm mesh made of a zinc aluminum alloy plated iron wire having a wire diameter of 5 mm is used, and for the wire mesh 2 of the partitioning frame 8, for example, a zinc aluminum alloy plated wire of 4 mm diameter is used. A wire net having a mesh of 100 mm made of iron wire is used.

The suction-prevention sheet 3 is for preventing the earth and sand under the revetment from being sucked out by flowing water, and a sheet having water permeability and high corrosion resistance, for example, a mesh sheet made of synthetic resin is mainly used. I have.

The suction-prevention sheet 3 is attached to the back and bottom of the box-shaped frame 1 by a method such as nailing. At this time, the suction-prevention sheet 3 on the back is attached to the outside of the rear frame 7 by nailing the periphery thereof, and the suction-prevention sheet 3 on the bottom is a lower frame of the front frame 7, the partition frame 8 and the rear frame 9. It is attached by nailing around.

The flat cover 4 is placed over the protruding portion 5a of the revetment basket 5 located below, and projects a lower end portion of the wire mesh 2 attached to the front frame 7 substantially horizontally for a predetermined length. Is formed.

The front frame 7, the partition frame 8 and the rear frame 9
Are preformed at factories, etc.,
The wire mesh 2 and the flat lid 4 are also attached at the same time. As a forming method, for example, a method in which a main bar 11 and a wire mesh 2 having an anchor portion 2a around it are integrally set in a mold (not shown) is set, and then concrete is cast into the mold. It can be molded efficiently.

The revetment cages 5 formed in this manner are stacked on a shore such as a river, for example, while being connected to each other by a connecting metal fitting 10 and filled with a stuffing stone 6, and further gradually retreated. ing. In addition, earth covering is applied on each seawall 5 as necessary. In this way, a multi-tiered seawall structure is constructed.

Adjacent revetment cages 5 are connected to each other by a plurality of connecting fittings 10, and furthermore, by connecting fittings 10 and connecting fittings 15 in exactly the same manner as when connecting front frame 7 and partitioning frame 8, for example. I have.

[0026]

The present invention has the above-described structure,
In particular, the revetment baskets are formed by attaching the suction prevention sheets to the front and side surfaces of the concrete box-shaped frame body and the back and bottom surfaces, respectively, so that both the rigidity and strength are far greater than iron wire cages. It is large and does not easily deform when stuffing stones. In addition, even if a part of the wire mesh breaks with the passage of time, the form of the box-shaped frame is still maintained, and there is no danger of causing the entire collapse. There are effects such as easy construction.

[Brief description of the drawings]

FIG. 1 shows a revetment basket, (a) is a perspective view thereof,
(B) is an exploded perspective view thereof.

2A is a cross-sectional view of a front frame and a partition frame, and FIG. 2B is a partial plan view showing a front frame and a partition frame, and a connecting portion between the partition frame and a rear frame.

FIG. 3 is a partial front view of the multi-tiered seawall structure.

FIG. 4 is a vertical cross-sectional view of a multi-tiered seawall structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box-shaped frame 2 Wire net 3 Suction prevention sheet 4 Flat lid 5 Seawall basket 6 Filling stone 7 Front frame 8 Partition frame 9 Rear frame 10 Connecting metal fittings 11 Main bar 12 Connecting hole 13 Mortar or coagulant 14 Reinforcement bone 15 Connecting metal fitting 16 Connecting bolt

Claims (5)

[Claims] 1. A concrete box-shaped frame is formed, and a wire mesh is attached to a front portion and a side portion of the box-shaped frame, and a suction prevention sheet is attached to a back portion and a bottom portion, respectively. Seawall basket. 2. The seawall according to claim 1, wherein the box-shaped frame is formed by connecting a front frame, a partition frame, and a rear frame, each formed in a rectangular shape, to each other with a connecting metal. Basket. 3. An embankment according to claim 1, wherein an anchor portion is provided around the wire mesh, and the anchor portion is fixed to a reinforcing bar embedded in the concrete of the box-shaped frame. Basket. 4. A multi-stage seawall comprising a plurality of seawall cages according to claim 1, 2 or 3, which are connected to each other by connecting metal fittings and stacked with filling stones. Structure. 5. The seawall structure according to claim 4, wherein the seawall cages are stacked while being gradually retracted.