JP2000234303A - Repairing method for mountain-climbing road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a walk by filling a lumpy substance in a scoured mountain-climbing road, covering the road with a water permeable sheet, covering the upper part with earth, and arranging porous concrete for filling earth in inside voids in the upper part. SOLUTION: A lumpy substance 1 such as natural rock, a cobble stone, gravel, a crushed stone, foaming styrene and a lightweight artificial stone is filled in the lowest part of a scoured mountain-climbing road A. Next, the lumpy substance 1 is covered with a sheet 2 composed of natural fiber such as a straw and a palm, and both end parts of the sheet 2 are pressed down by nails. Next, earth used to cultivate a general plant 3 is laid on the sheet 2. A porous concrete block 4 being made of a millet-and-rice cake-like tissue and having abundantly voids on the inside is laid on the earth 3. The earth 3 is also filled inside the voids of the porous concrete block 4 to thereby facilitate a walk as well as to recover vegetation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for restoring a scoured mountain trail, and more particularly to a method for preventing the progress of scouring on a mountain trail due to running water during rainfall, facilitating walking, and effective in returning vegetation. A method of restoring a mountain trail.

[0002]

2. Description of the Related Art In recent years, as a result of the development of a transportation network in mountainous areas, it has become possible to easily access the foot of the mountain by car, and it is possible to relatively easily enter a mountain trail. In general, mountain trails are often composed of soil that is easily eroded by water currents, such as soil and crushed material, and are supported by plant roots.However, increasing number of climbers can consolidate and kill plants. Many. Therefore, the soil was easily washed away by the water current, and the phenomenon of scouring in a U-shape gradually occurred.

[0003] The mountain trail that has begun scouring in this way is located one step lower than its surroundings on the terrain, and becomes a water channel of rainwater that flows down during rainfall. Because of this, the climbing road is further excavated by this flowing water flow, and it is difficult to walk, such as being narrow, muddy, muddy, or severe unevenness, so it is necessary to avoid climbing roads that are difficult to walk, and to make it easy to walk There is an increasing number of climbers walking along the overgrown areas of plants.

[0004] As a result of the above, plants around the mountain trail are stepped down, and the soil supported by the roots of the plant is easily washed and the scour area is further expanded. It is often designated as a national or prefectural natural park, but it has the disadvantage of eradicating precious plants. Investigating this damage at the main ridgeline of the Asahi Mountains, which spans Yamagata and Niigata prefectures, a report shows that it is 5 m wide and 1 deep.
m, scouring ground more than 100m in length was seen in various places. Similar scouring has been observed in other mountain systems, and it has been a challenge to stop and restore natural destruction and secure a strong mountain trail.

[0005] Conventionally, as a method of solving these,
(A) Several wooden piles are buried in the ground, a receiving plate is fixed to the pile above the surface of the piles and fixed to the ground, and this is used as a step. (B) A scoured bare land Covered with soil,
A method has been adopted in which vegetation is restored by covering the top with a straw made of straw or the like.

[0006]

However, in the case of the above (a), since the resistance to running water and landslides during rainfall is low, when the rainfall is severe, the water flows down over the receiving plate. The mountain trail turns into a waterway. As a result, the sediment was washed down by the running water, and the mountain trails were often deeper U-shaped. In addition, since there is no opening in the receiving plate of the steps, when water flows into the lower parts of the steps, the water flows like a waterfall at a stretch, and the lower parts of the steps are easily washed.

[0007] Since the ground around the step pile is loosened and the earth and sand easily flows out, the step itself may be collapsed after a long time. Furthermore, since piles and receiving plates are often made of wood, they have the disadvantage that they deteriorate quickly and have a short life. Also, in the case of the above (b), there is a problem that soil is easily washed away by rainwater except on a flat ground or a place where the slope is extremely gentle.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and makes it easy to walk on a mountain climbing road, does not increase the width of a walking section, and furthermore, aims to solve the problem. The purpose is to provide vegetation that can recover vegetation in scoured places other than those that do not collapse on a scoured mountain trail due to load or water flow during walking. After filling the bulk material to secure the foundation of the walking part and the flow path of rainwater, it is covered with a sheet having water permeability, the upper part is covered with soil, and the upper part is further filled with soil in the internal void. There is a method for restoring a mountain trail characterized by installing a concrete block to provide vegetation restoration and good walking properties.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method of restoring a mountain trail according to the present invention will be described in detail with reference to an embodiment shown in the drawings. In the figure, A is scoured in a U shape by flowing water such as rainwater. On the mountain trail A, a massive substance 1, a sheet 2, a soil 3, and a porous concrete block 4 are arranged in order from the lower side to the upper side.

In the construction method, first, a lump-shaped substance 1 is filled in the lowest part of the mountain trail A that has been scoured, so that the walking part has a structure having water permeability. The block-like substance 1 may be any substance that does not easily collapse due to walking load or water, such as natural rock, boulder, gravel, crushed stone, styrofoam, lightweight artificial rock, and the like.
% Voids. As a result, it is possible to prevent the generation of a flowing downflow having a high flow velocity after rainfall, and to allow the water to smoothly penetrate from the surface to the underground. In addition, from the viewpoint of walking property, it is preferable that the mass-like substance 1 has a finer particle size from lower to higher.

Next, the bulk material 1 is covered with a sheet 2. The sheet 2 needs to be capable of penetrating rainwater and retaining the soil 3 above the sheet. Therefore, a sheet composed of a fibrous substance is preferable. More preferably, fibers composed of natural fibers such as straw and palm are preferable in view of the scenery. Although not shown, the sheet 2 is preferably pressed with hook-shaped nails or the like along its both ends so that the sheet 2 is not easily peeled off the mountain trail A.

The soil 3 is laid on the sheet 2. The soil 3 may be any soil used for general plant cultivation. However, in a natural park or the like where the surrounding vegetation needs to be considered, it is better to use high-temperature sterilized soil in an autoclave or the like in order to prevent the propagation of species other than the plants growing in that location. If necessary, a mixing soil such as perlite or vermiculite or a fertilizer may be mixed.

Then, a porous concrete block 4 is laid on the soil 3 using cement, water, coarse aggregate, and an admixture. Is not used at all, or is made of a material that uses only a minute sand of about 0.6 mm, and has a cavity-like structure with many voids inside. As the cement to be used, Portland cement such as ordinary Portland cement and early-strength Portland cement or a mixed cement is used.

[0014] The water is JIS A5308 such as tap water.
(Ready mixed concrete) can be used. As the coarse aggregate, gravel, crushed stone, and lightweight aggregate used as coarse aggregate for concrete are used. The admixture is JI
The dispersibility of cement particles is improved by using the water reducing agent, the AE water reducing agent, and the high-performance AE water reducing agent admixture described in SA6204 (chemical admixture for concrete) to reduce the unit water amount and increase the strength.

After the above materials are added and kneaded, the mixture is formed into a block shape. Thereafter, curing such as steam curing, air curing, and underwater curing is performed to obtain the porous concrete block 4. The shape is a flat plate, the cross section thickness is 5 to 10 cm, and the dimension of the plane portion is about 30 to 50 cm, and the workability is good in view of the covering property and the weight of the lower soil 3. In addition, the strength of the specimen prepared using the above-mentioned concrete is set at 10 to prevent breakage during handling such as transportation and walking.
N / mm ² or more is preferably expressed.

Next, the inside of the void of the porous concrete block 4 is filled with soil. This can provide an environment in which vegetation can easily return. The soil used for filling may be the same as the soil 3 laid below the block 4.

By adopting the above-described embodiment, a restoration excellent in walking property, scouring resistance and vegetation restoration can be obtained. Here, on the upper surface of the porous concrete block 4, a mixture of plant seeds around a construction site previously collected on a commercially available horticultural soil is sprayed and filled into the voids of the porous concrete block 4 while leveling. It can also be done.

In the above, an example has been described in which the lower soil 3 is entirely covered with the porous concrete block 4 as shown in FIG. 1, but as shown in FIG. The object of the present invention can also be achieved by installing a concrete block or a pseudo-stone-like flat plate 5 and laying the porous concrete block 4 on the left and right sides. In this case, the porous concrete blocks 4 and 4 also function as soil holding.

Therefore, water flowing down the mountain road A due to rainfall flows into the lower soil 3 through the internal voids of the porous concrete block 4 and between the porous concrete blocks 4, 4, and the soil 3 is saturated. Water flows into the bulk material 1 via the sheet 2 laid underneath. Then, while flowing down from the mountain side to the valley side in the bulk material 1, the running water flows down while hitting each bulk material 1, bypassing the gap. As a result, the flowing water velocity is reduced, and the flow becomes a gentle flow and flows down between the massive substances 1 in the valley side direction. Therefore, there is almost no water flowing on the surface of the mountain trail A, and since there is no muddy stagnation in the scouring basin, a state suitable for walking is maintained.

In the case where the seeds of the plant are filled in the voids of the porous concrete block 4, the seeds of the plant and the seeds of the surrounding plants are placed in the voids of the porous concrete block 4 after construction. In this case, the seeds of this plant germinate due to the moisture contained in the soil in the porous concrete block 4 and the lower soil 3, respectively, and prosper and return to vegetation.

[0021]

EXAMPLE A mountain trail of about 120 cm in width and 60 cm in depth, which was scoured into a U-shape, was first filled with a conglomerate having a long diameter of 10 to 40 cm to a depth of 20 cm, and 40-0 crushed stone (particles) was placed thereon. (Diameter: 40 mm to 0 mm) was spread to a thickness of 10 cm and leveled. Thereafter, the scouring area is entirely covered with a sheet made of natural palm nut fiber (palm fiber) [Nichiken Kogyo Co., Ltd. “Stella sheet” (trade name) 5 mm thick], and the adjacent non-scouring area Was also laid so as to cover approximately 10 to 30 cm.

In the non-washing area, the sheet was fixed with a nail having a length of 200 mm, a diameter of 5 mm and a hook-shaped head so that the sheet was not easily moved. And the soil on the sheet was constructed as follows. As the soil, soil for general plants marketed at a horticultural store was used, and the entire sheet was covered with soil so as to be approximately 10 cm.

The composition of the porous concrete block installed on the soil is shown below. [Proportion of mixing] [kg / m ³ ] (1) Water 49.2 (2) Ordinary portland cement 261 [Pacific Cement Co., Ltd., specific gravity 3.16] (3) Coarse aggregate 1540 [Crushed stone 20 -10 mm, specific gravity 2.60] (4) High performance water reducing agent 5.21 [Mighty 150 (trade name) manufactured by Kao Corporation]

The shape of the porous concrete block is as follows.
Flat plate with a cross section thickness of 5 cm and a plane part size of 40 × 4
A 0 cm porous concrete slab was produced. The porous concrete slab was laid so as to cover all the soil underneath. After the laying, a mixture of plant seeds collected in the vicinity of the construction site collected in advance on a commercially available horticultural soil was sprayed on the upper surface of the porous concrete plate, and the mixture was filled into the voids while leveling.

After repairing the scouring part as described above and observing it for four months after the construction, the water flow velocity was lower than before and the outflow of sediment was reduced during rainfall. The scouring part had irregular irregularities and mud, making it difficult to walk, but after the construction, it became flat, and the mud was eliminated, making it easier to walk. The seeds filled in the porous concrete plate have germinated. At the end of the rehabilitated area, the plants that had flourished in the non-rehabilitated area began to grow and take root, showing a vegetation-return effect.

[0026]

The following effects can be expected by the method for restoring a mountain trail according to the present invention. (1) Rainwater that flows along mountain trails during or after rainfall,
Since the water or mud is stagnated quickly in the sidewalk, it is easy to walk. (2) Since rainwater flows down as a gentle flow inside the repair part, the outflow of earth and sand is reduced and scouring is controlled, and the amount of seepage water into the underground increases. (3) By adopting the restoration method, it is possible to restore the vegetation at the scouring site.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a method for repairing a mountain trail according to the present invention.

FIG. 2 is an explanatory sectional view showing another method of restoring a mountain trail according to the present invention.

FIG. 3 is an explanatory plan view of FIG. 2;

[Explanation of symbols]

 A mountain trail 1 massive substance 2 permeable sheet 3 soil 4 porous concrete block 5 pseudo-stone-like plate

Claims (4)

[Claims] Claims: 1. A scoured mountain trail is filled with a lump-shaped substance that does not collapse due to a load or water flow during walking to secure a foundation for a walking section and a flow path of rainwater, and then a sheet having water permeability is used. Restoration of mountain trails characterized by covering and covering the upper part with soil, and installing a porous concrete block filled with soil in the inner space on the upper part to restore vegetation and provide good walkability Method. 2. A scoured mountain trail is filled with a lump of substance that does not collapse due to a walking load or a water flow to secure a foundation for a walking section and a flow path of rainwater, and then covered with a sheet having water permeability. Then, cover the upper part with soil, further install a porous concrete block or pseudo-stone-like plate on the upper surface of which is attached a pseudo-stone or the like, and install a porous concrete block filled with soil in the internal voids on the left and right sides, respectively, to cover the vegetation. A method for restoring a mountain trail characterized by providing a good return and good walkability. 3. The method according to claim 1, wherein soil and plant seeds are filled in the internal space of the porous concrete block. 4. The method for repairing a mountain trail according to claim 1, wherein the massive substance is at least two kinds of natural rock, gravel, styrofoam, and lightweight artificial rock.