JPS6145017B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a bag-like vegetation zone structure that can be easily and reliably planted on a slope when greening the slope. Conventional methods of protecting slopes include masonry, concrete paving, concrete spraying, etc., but from the perspective of environmental conservation, it is necessary to green the slope, and for this reason, it is necessary to green the slope by planting seeds, planting grass, etc., and adding soil. Although vegetation is being grown, due to the conditions of the slope, such vegetation construction methods cannot provide sufficient stabilization against rainfall and snow on slopes that lack the soil necessary for vegetation, such as rock-cut slopes. In addition, it requires a large amount of money to cover soil sufficiently, and the work is difficult and dangerous. An object of the present invention is to provide a bag-like vegetation zone structure that solves this problem and enables easy and reliable vegetation on slopes. The gist of the present invention is that, as shown in the drawings, the upper layer consists of a first layer made of weather-resistant coarse-grained cloth 1 and a second layer made of a non-woven sheet layer 2 mixed with plant seeds and fertilizers. Depending on the mesh cloth 3
Or, there is a bag-like vegetation zone structure consisting of a third layer consisting of a wet cloth 4 having water-holding properties, and a lower layer consisting of a durable cloth 5, and in the structure, an upper layer and a lower layer are separated. A bag-like vegetation zone that has one or more point-like or linear nodules with a small area between them, and also has a difference in area between the upper layer and the lower layer of the structure by 10% or more. in the structure. The knotted portion in the present invention includes not only a state in which the upper and lower layers are in close contact with each other, but also a state in which the upper and lower layers are connected while maintaining a certain distance. The present invention will be explained in detail below with reference to the drawings. FIG. 1 is a schematic diagram showing the structure of the bag-like vegetation zone structure of the present invention. A cloth made of synthetic fibers having the following properties may be used. If you use cloth that lacks weather resistance and its strength deteriorates significantly due to the influence of weather, it will not be able to stably hold the vegetation zone structure, and it will be a big danger if the construction site is at a high place. It is not desirable to use cloth that has deteriorated significantly. Particularly when construction is performed on a cut slope, durability is required, so the bag body containing soil is required to have long-term durability. In addition, this cloth 1 needs to have a coarse mesh density necessary for seeds to germinate from the second layer of non-woven sheet layer 2 mixed with plant seeds and fertilizer to the outside of the vegetation zone structure through the gaps in the cloth. There is. The second non-woven sheet layer 2 contains plant seeds and fertilizers, and when the vegetation zone structure of the present invention is filled with soil, it prevents the seeds from being moved and destroyed when the soil is filled. In addition to preventing this, it is also possible to incorporate a water-retentive wet into the nonwoven sheet layer to exert a useful effect on seed germination and growth. The third layer, which is used as necessary, protects the seeds and fertilizers by preventing the second nonwoven sheet layer 2 from being damaged or scattered during soil filling, and a mesh cloth 3 is generally used. In addition, if the construction site is in a place with little rainfall or has very good drainage, a wet cloth with water-holding properties may be used.
By using the non-woven sheet layer 2, moisture is retained and germination is ensured. It is necessary to use a durable cloth as the lower layer cloth 5, and for example, a cloth made of synthetic fibers such as polyester fibers, acrylic fibers, and polypropylene fibers may be used. When filling soil and using it, it is natural that the soil within the vegetation zone structure contains moisture and this moisture is necessary for plant growth, but at the same time it is important to permanently maintain the form of the bag-like structure. A cloth with sufficient durability is essential. In addition, it must have a space necessary for the roots extending from the seeds of the second nonwoven sheet layer 2 to protrude from this non-layered portion and reach the ground of the constructed slope. The bag-like vegetation zone structure according to the present invention has a bag-like shape such that when filled with soil, the upper layer and the lower layer form a cavity that can accommodate soil. The vegetation zone structure according to the present invention can be easily constructed without being affected by the slope, unevenness, or soil quality of the construction slope, and is stable over time due to its excellent weather resistance and durability. There are no safety issues, and the vegetation zone structure has a multi-layered bag-like structure, which provides sufficient protection against slopes, seeds, and fertilizers, and allows for good plant growth even in the event of rain. be. Furthermore, it is desirable that the vegetation zone structure of the present invention has one or more knots between the upper layer and the lower layer, as shown in FIGS. 2 and 3. This bag-like structure, which has a knot between the upper and lower parts, is useful when the construction site is on a particularly steep slope or where there is little rainfall. When used after being filled with soil, the soil tends to be unevenly distributed in the lower part due to the gravity of the filled soil, and if it has knots, it is possible to stop the soil from moving. In addition, if the construction site has particularly low rainfall, or if construction is performed during a period with low rainfall, the knots 6, 6', 7, and 7' of the vegetation zone structure will be removed as shown in Figures 2 and 3. It has a concave shape, and as a result, more rainwater is retained in the concave portion, and as a result, plant growth is more reliable. Further, in the bag-like vegetation zone structure of the present invention, as shown in FIG. 5, it is desirable that the difference in area between the upper layer and the lower layer is 10% or more. If the slope to be constructed is particularly uneven, it is especially important to construct the bag-like vegetation zone structure closely to the slope, and the area of the upper layer should be 10% larger than the area of the lower layer
Making it larger or smaller will help the roots of plants that have grown in close contact with the slope to grow more effectively toward the wall surface, and will also stabilize the vegetation zone structure itself after construction. In addition, especially when filling with soil, the area of the upper layer should be 10% of the area of the lower layer.
By increasing the size above, it is possible to easily retain moisture from rainwater, irrigation, etc. on the laying surface when using the soil filling method. Although the bag-like vegetation zone structure of the present invention can be laid on a slope as it is with the upper layer facing upward, it is preferable that the structure is formed between the upper layer and the lower layer of the structure before it is laid on the slope. It is preferable to fill the cavity with soil and use it as a sandbag. When used as such sandbags, the roots protruding from the coarse cloth make the bond between each bag-like structure stronger than in ordinary sandbags, and the usable period is dramatically increased. The present invention will be explained below with reference to Examples. Example 1 A coarse cloth was woven using acrylic spun yarn under the following conditions.

[Table] A nonwoven sheet layer mixed with plant seeds and fertilizer was used as the second upper layer and sewn into a rectangular bag-like structure with a width of 1.5 m and a length of 2.0 m. Pre-slope width 1.2
A metal frame with a length of 1.6 m and a height of 20 cm from the wall surface was installed, the bag-like structure was laid within this frame, and mudflow-like soil was poured into the bag-like structure.
After one month, the plants that germinated and grew from the upper surface of the bag-like structure were in good growth condition, and even during the rain, no seeds were washed away, and almost uniform growth was observed from the entire surface of the bag-like structure. It was done. Example 2 A cloth under the following conditions was woven using acrylic spun yarn in a double weave.

[Table] The obtained fabric was steam-treated with as little tension as possible, and then sewn together with the upper layer and second layer of wet cloth mixed with plant seeds and fertilizer, and the third layer of reticulated cloth. , a bag-like structure with a length of 10 m. Next, anchors were driven into the knots of the structure and the structure was laid on a slope with an inclination of approximately 45°, after which lahar-like soil was injected from the top of the bag-like structure. Approximately one month later, the plants that had sprouted and grown from the upper surface were in good growth condition and had no problems in terms of peeling off from the slope. Example 3 Two coarse cloths with the following conditions were applied to the acrylic spun yarn.
Woven with heavy weave.

[Table] In this case, a knot in the form of Figure 4 C is provided, and the width
A bag-like fabric structure with a length of 1.5 m and a length of 10 m was obtained. The resulting fabric structure is steam-treated with as little tension as possible, anchors are driven into the knots of the fabric structure, it is laid on a slope with an inclination of approximately 45°, and then a mudflow is applied from the top of the bag-like fabric structure. soil was injected. Thereafter, the coarse cloth in the first upper layer and the wet cloth mixed with plant seeds and fertilizer in the second layer were fixed from above with plastic pins. Approximately one month later, the plants sprouted from the upper layer and were in good growth condition.
Roots also penetrated into the mesh-like cloth of the third layer, and there was no problem in terms of separation from the slope.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of a bag-like vegetation zone structure of the present invention, FIG. 2 is a partial perspective view of a bag-like vegetation zone structure having dotted nodules, and FIG. 3 is a linear nodule structure. Fig. 4 A, B, and C are plan views showing various arrangement examples of linear nodules; Fig. 5 A, B are partial perspective views of bag-like vegetation zone structures having FIG. 2 is a partial perspective view of a bag-like vegetation zone structure with different areas. 1... Coarse cloth of the first layer of the upper layer, 2... Nonwoven sheet layer mixed with plant seeds and fertilizers of the second layer of the upper layer, 3... Reticulated cloth of the third layer of the upper layer, 4...
Upper layer third layer web, 5...lower layer, 6,
6'...Punctate nodule, 7,7'...Linear nodule.

Claims (1)

[Claims] 1. The upper layer is composed of a first layer made of weather-resistant coarse cloth and a second layer made of a non-woven sheet layer mixed with plant seeds and fertilizers, and the lower layer is durable. A bag-like vegetation belt structure composed of cloth and having one or more point-like or linear nodules with a small area between the upper and lower parts. 2. The bag-like vegetation zone structure according to claim 1, wherein the difference in area between the upper layer and the lower layer is 10% or more.