JPH0730537B2 - Natural restoration method of revetment using cylindrical vegetation bundle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for natural restoration of a seawall using a bundle of columnar vegetation, which can prevent erosion of the seashore and can be restored to an aesthetic seawall by vegetation.

[0002]

2. Description of the Related Art Conventionally, as a method of restoring a seawall,
Rough fence work etc. are carried out.

[0003]

However, the above-mentioned conventional construction methods do not have good workability, and the effect of stabilizing the soil on the shore is not sufficient.

The present invention is intended to provide a method for natural restoration of a revetment, which has better workability than the conventional construction method and further exhibits an excellent effect on soil stability.

[0005]

In order to achieve the above object, the present invention has a columnar vegetation bundle in which a plant fiber 3 is cylindrically wrapped with a net 4 at a boundary between a land 6 and a river, lake, sea or the like 1. 5 is installed in a stable state, and the plants 10 are planted in the columnar vegetation bundle 5 to prevent erosion of the shore and restore vegetation.

[0006]

[Function] The columnar vegetation bundle 5 stably installed at the boundary between the land 6 and the river 1, lake, sea 1, etc. increases its own weight by absorbing water or rainwater of the river 1, etc. It is stable, which prevents the outflow of sediment from land 6.
In addition, the roots of the plants 10 planted in the columnar vegetation bundle 5 grow and enter the ground to stabilize the soil, and eventually the vegetation suitable for the environment of the land is restored, resulting in a natural landscape. It will be restored and a natural environment that can serve as a habitat for small animals and a spawning place for fish will be realized.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

First, the water 2 of the river 1 is cut off by an arbitrary method, the flow rate and direction of the water 2 of the river 1 and the erosion condition of the shore etc. are grasped, and then the plant fiber 3 obtained from the coconut skin is removed. A cylindrical vegetation bundle 5 packed in a cylindrical shape with a synthetic resin net 4
Install at the boundary between land 6 and river 1. In this case, the ground supporting the columnar vegetation bundle 5 is adjusted with stones or the like so that the installed columnar vegetation bundle 5 appears on the water surface 5 cm above the mean water level line.

Next, the plurality of piles 7 are driven into the ground at a suitable interval while being in contact with the side surface of the columnar vegetation bundle 5 on the river 1 side to stabilize the columnar vegetation bundle 5. After that, if a depression 8 is formed between the land 6 and the cylindrical vegetation bundle 5, the soil 9 is put into the depression 8, and the land 6 and the column
The vegetation bundle 5 is flattened by pressurizing it with a roller or the like so as to be continuous. In a river or the like having a large flow rate, it is desirable to mix gravel and highly viscous soil into the above-mentioned guest soil 9.

[0010] After installation of the cylindrical vegetation bundles 5, circular columnar vegetation bundle 5 by wetted with rain water or the like in accordance with the elapse of time,
It becomes heavier than its own weight immediately after installation, so it is more stable. Then, when the columnar vegetation bundle 5 becomes stable, the aquatic plants 10 such as reeds, futoys, cattails and ginger are placed on the columnar vegetation bundle 5.
Plant. Further, the aquatic plant 10 is similarly planted also in the portion of the soil 9 which is put into the depression 8 formed between the land 6 and the columnar vegetation bundle 5. It was confirmed by experiments that the distance between the plants of each aquatic plant 10 is optimally 15 to 30 cm.

[0011]

According to the present invention as described above, which uses a cylindrical vegetation flux packaged in cylindrical plant fiber net, circular columnar vegetation bundle performed easily handled in the field,
Even if the boundary between the land and the river, lake, sea, etc. is curved, it is a circle
While bending the pillar-shaped vegetation bundle, set it so that it matches the boundary line.
Since it can be placed, it is superior to the conventional method in terms of workability.

[0012] In addition, although primarily originally installed a cylindrical vegetation bunch of shore by the circular columnar vegetation bunch erosion is prevented, the
As soon as the plants planted in the columnar vegetation grow up and their roots increase and reach the ground, the soil will be stable and shore erosion will certainly be prevented. In addition, by restoring the vegetation according to the environment of the land, the natural landscape is restored, it becomes a place for spawning small animals and fish, and the water quality is purified by aquatic plants. It exerts a great effect of improving the natural environment of river banks, lake banks and coasts.

[0013] Especially at the boundary between land and rivers, lakes, seas, etc.
The placed cylindrical vegetation bundles should be made by wrapping plant fibers in a net.
Because it has a structure that allows water to easily pass inside,
Since the outer surface of the columnar vegetation bundle is an arcuate surface,
Does not pass the inside of the water flow in the direction intersecting the length direction
The water flow flows smoothly along the arcuate surface, which makes it a circle
Stable because large water pressure and levitation force do not work on the columnar vegetation bundle
A river with strong water flow and waves because it has good properties and is not likely to be washed away.
・ Reliably prevent shore erosion and restore nature even in lakes and the sea
It has the features that can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an implementation state of the present invention.

[Explanation of symbols]

1 Rivers, lakes, seas, etc. 3 Plant fibers 4 Nets 5 Cylindrical vegetation bundles 6 Land 10 Plants

Claims (1)

[Claims] To 1. A boundary between the land and the rivers, lakes, sea and the like, set up a plant fiber in a state in which the cylindrical vegetation flux packaged in cylindrical stable net, to instill plants circular columnar vegetation bundle This method prevents the erosion of the shore and restores the vegetation, which is a natural restoration method for the revetment using a columnar vegetation bundle.