JPH08158344A - Construction of revetment by use of natural stone - Google Patents

Abstract

PURPOSE: To provide a revetment by which a scenic view can be obtained and a protective circumstance of a biological system in a water front or a river can be secured and also the greening on a revetment slope above the water level can be achieved in a short period. CONSTITUTION: A gravel layer 2 is laid on a smoothed slope. A preventive material 3 against sucking out is laid on the gravel layer 2 and a net 4 made of a synthetic resin mesh is laid down. The base of grip anchors is fixed in an insertion hole bored in advance in a natural stone. The grip anchors are joined to the net by a rope. And further, the void formed among the natural stones 7 is filled with natural stones 12 and these are back-filled with gravels 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a bank protection method using natural stone.

[0002]

2. Description of the Related Art Heretofore, in the method of seawall construction, a method of laying flat tile blocks made of precast concrete has been mainly used. In addition, as a revetment construction method using natural stones, after constructing the foundation such as placing concrete on the slope of the revetment, relatively large natural stones such as boulders, crushed stones and half-broken stones are laid out, In some cases, concrete was placed afterwards to construct a revetment slope with the top of the natural stone exposed. However, in the construction method of laying the above tile blocks, the construction surface has a unique color of concrete and presents an artificial landscape,
Furthermore, because the properties do not change and greening does not occur even after time,
There was a problem that the natural scenery was significantly damaged over a long period of time. In addition, even in the revetment construction method using the above natural stone, while exhibiting an artificial landscape peculiar to concrete, during the period from the stone hanging work by the crane to the concrete placing work by the revetment construction method. However, there is a problem that the sitting of natural stones laid on the slope is unstable, and it is dangerous in work.

Therefore, in recent years, a new revetment construction method has been proposed, which solves the problems in the above-mentioned conventional construction methods and also considers the protection of the ecosystem at the waterside and rivers. For example, there are those that use a net-like material that is formed integrally with natural stone and wire mesh, and to briefly describe the construction method, first perform smooth shaping of the revetment slope to perform construction,
Next, the suction preventing material is laid from the top end, and the net-like material is laid. Further, the respective net-like objects are coiled together, and the natural stone void portion of the net-like material is covered. Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-108437, a method of forming a revetment connecting block or a revetment consolidation block using natural stone is found. After arranging the natural stones with connecting holes in which vertical and horizontal through-holes that pass almost near the center of gravity are drilled vertically and horizontally,
The gist of the present invention is that a connection wire or the like is penetrated and connected to the connection holes of the natural stones with the connection holes, and a filling material is arranged between the natural stones with the connection holes and the natural stones with the connection holes. Was something.

[0004]

In the method for constructing a revetment using a net-like object formed integrally with natural stone and a wire net according to the above-mentioned prior art, the natural stone and the wire net are bonded by an adhesive. When the river rises due to heavy rain or snowfall and boulders are seen from the upper stream, there is a disadvantage that the boulders cause the bonded natural stones to peel off from the wire mesh. Further, there is also a problem that, when the natural stone peels off in a part of the net-like material, the peeling further proceeds from the peeling portion.

On the other hand, in the method for forming a connection block for a seawall or a root block for a sea floor as described in the above-mentioned section of the prior art, the natural stone to be used in the method passes through substantially the center of gravity. It is necessary to form a connecting hole for passing the connecting wire in the vertical direction and the horizontal direction, which requires a labor and time for the preparation work.

Accordingly, the present invention has been made in view of the above-mentioned drawbacks and the like. The object of the present invention is to provide a natural stone to be used in the present invention by a simple working operation,
A good landscape can be obtained even after the construction mainly with the laying of the natural stones, the ecological protection environment of the waterside and rivers can be secured, and the greening of the seawall slope on the water surface can be achieved early. Another object of the present invention is to provide a seawall construction method using a new natural stone.

[0007]

In order to achieve the above object, a method for embankment construction using natural stone according to the present invention has the following arrangement. That is, the revetment construction method using natural stone according to the present invention includes a step of providing a gravel layer after smoothing and shaping a slope to be revetd, a step of laying a suction prevention material on the gravel layer, and combining A step of laying a net material made of resin netting, and a step of wedge-ing the base of the grip anchor in an insertion hole previously drilled in natural stone, and fixing the grip anchor and the net material by a rooted rope. The present invention further comprises a step of filling natural stones into voids formed between the natural stones fixed to the net material and back-filling the backing material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. First, FIG. 1 is a cross-sectional view showing an outline of a revetment construction method using natural stone according to the present invention.
In the figure, a slope 1 provided to a revetment has been previously smoothed to a predetermined gradient, and a gravel layer 2 is formed on the slope 1. At this time, the gravel layer 2 is formed by rolling with a thickness of 100 mm to 200 mm. Further, a suction preventive material 3 is laid on the gravel layer 2. Here, as the sucking-out preventing material 3, synthetic fibers mainly composed of crimped polyester are irregularly arranged to form a fiber layer, and the fibers are three-dimensionally entangled and combined by a needling process. Need full mat manufactured by Tanaka Co., Ltd. can be used, for example. Next, on the suction-preventing material 3, a net material 4 made of polyethylene net material and made of Tylen hard rope made by Taito Seimitsu Co., Ltd. is laid. As shown, it is assumed that the net member 4 is hooked through a hook member 6 on a hook member 6 planted on a concrete foundation 5 cast on the top end of the slope 1.

On the other hand, FIG. 2 is a plan view showing an outline when the natural stone used in the present invention is fixed to a net material.
An insertion hole 9 is formed in the natural stone 7 in advance, and the base of the grip anchor 8 is wedge-fitted to the insertion hole 9. Here, the grip anchor 8 may be a commercially available one. When the base of the grip anchor 8 is pushed into the insertion hole 9 and the tip of the grip anchor 8 is hit, the grip anchor 8 is moved.
The base portion of the insertion hole 9 collides with the bottom of the insertion hole 9 and the base portion expands in the radial direction of the insertion hole 9 so as to be wedge-shaped. And
When the natural stone 7 is laid on the net material 4, the natural stone 7 is placed on the slope of the slope 1 from the riverbed 10 as shown in FIG.
Among them, those with a weight of more than 2 tons are arranged as root stones, and then natural stones 7 are stacked and installed from below the slope 1 to above. Here, the natural stones 7 stacked and arranged are hooked with a net material 4 and a grip anchor 8 wedge-attached to the natural stones 7 via hooking metal fittings as shown in FIG.
Try to connect with 1.

Further, as shown in FIG. 1, a small natural stone 12 is used as a filling material for height adjustment in a gap between the natural stones 7 connected to the net member 4 and arranged. It is pressed into the above-mentioned gap to adjust the surface wall of the slope formed by the natural stone 7 to be smooth, and the above-mentioned gap is filled with gravel 13 as a backing material to finish.

Next, FIG. 3 is a sectional view showing an outline of the vicinity of the waterside of the revetment construction method using natural stone according to the present invention. As shown, revetment slope 15 with water level 14 or higher
In the above, natural stone 12 used as a filling material in a gap between natural stones 7 and gravel 13 filled as a backing material
In addition, it is also possible to plant by the flowering tree 17. At this time, in order to prevent the flowering tree 17 from flowing out, the root of the flowering tree 17 was tied to the net material 4 with an elastic cord 16, and fertilizer was kneaded into the gravel 13 of the backing material. Filling with objects allows reliable planting.

[0012]

The seawall construction method using natural stones according to the present invention has the following effects because it has the above-described configuration.

First, according to the revetment construction method using natural stone according to the present invention, since an insertion hole is formed in natural stone and a grip anchor is wedge-fitted, processing becomes easy and material cost is reduced. At the time of lifting work with a crane, the lifting hook of the crane can be hooked directly on the natural stone grip anchor, or a wire can be inserted through a plurality of natural stone grip anchors and connected to the crane lifting hook. Is able to move a plurality of natural stones at one time, thereby improving construction speed.

Furthermore, according to the seawall construction method using natural stones according to the present invention, since natural stones are anchored to the net material made of synthetic resin, rivers are increased due to heavy rain or snowfall, and the upstream is increased. Even if there are more boulders, the outflow of natural stone can be prevented,
There is also an effect that the seawall slope can be maintained in a stable state for many years.

Furthermore, according to the seawall construction method using natural stones according to the present invention, since the seawall is constructed with natural stones, the amount of dissolved oxygen can be increased as compared to the construction surface with precast concrete blocks. Along with
Algae and aquatic organisms that feed on fish tend to adhere to natural stones,
There is also an effect that a favorable ecosystem environment can be formed in a short time.

Then, according to the revetment construction method using natural stone according to the present invention, the roots of flowers and trees can be tightly attached to the net material, so that the flowers and trees are planted on the revetment slope without flowing out. It also has the effect of being able to plant.

Further, the revetment construction method using natural stone according to the present invention also has an effect that a revetment can be easily performed even on a slope having a curved surface which has a difficulty in the concrete block upholstery construction method and the like.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of a revetment construction method using natural stone according to the present invention.

FIG. 2 is a plan view showing an outline when natural stone used in the present invention is anchored to a net material.

FIG. 3 is a cross-sectional view showing an outline of the vicinity of a waterside of a revetment construction method using natural stone according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slope 2 Gravel layer 3 Suction prevention material 4 Net material 5 Concrete foundation 6 Hook member 7, 12 Natural stone 8 Grip anchor 9 Insert hole 10 Riverbed 11 Rooted rope 13 Gravel 14 Water level 15 Seawall slope 16 String 17 Hanaki

Claims (1)

[Claims] 1. A step of providing a gravel layer after smoothing a slope to be reveted, a step of laying a suction preventive material on the gravel layer, and a step of laying a net material made of a net made of synthetic resin. And a step of wedging the base of the grip anchor into an insertion hole previously drilled in the natural stone and connecting the grip anchor and the net material with a rooted rope, and further connecting to the net material. A method of revetment construction using natural stone, comprising the step of filling natural voids between the natural stones and backfilling the backing material.