JP2006299537A - Double-layered slope greening method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slope greening method which enables slope vegetation to be performed even if a layer thickness is small, by providing a slope protection layer with water retentivity and water permeability, and a vegetation layer positioned on the slope protection layer. <P>SOLUTION: This slope greening method is characterized as follows: 5-15 wt.% cement 10b with respect to a bark material 10a, a 2-7.5 wt.% cement solid hardener 10c and a 0.8 wt.% cement joint material 10d with respect to the cement 10b, and 60-100 wt.% water are mixed into the bark material 10a with a moisture content of 50-60% and a particle diameter of 15-20 mm, and sprayed on the slope by a thickness of 10-20 mm, so as to form the slope protection layer 10; and the vegetation layer 20 is formed by spraying a vegetation base material, in which seeds 20a are mixed into a borrow 20b such as bark composed of crushed wood bark etc., peat moss and leaf mold, borrow, etc., by a predetermined thickness on the surface of the layer 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a slope revegetation method in which a slope revegetation base is formed as two layers of a slope protection layer and a vegetation layer provided on the slope protection layer.

  Conventionally, in the slope planting method, a structural member such as a wire mesh, a synthetic resin mesh, or a blade anchor is disposed on the slope, and a vegetation base layer is sprayed. Although this method has an advantage that the slope protection is surely performed by protecting the slope and the base layer supported by the structural material, there is a problem that the metal or the synthetic resin is left permanently. .

  Patent Document 1 discloses a vegetation deep bed comprising a hard base such as a spray surface of concrete or mortar, a relatively porous and stable sand base layer that is optimal for plant growth, and a thick base material surface layer. A method for greening a hard slope that can efficiently form a layer has been proposed.

  In this invention, a through-hole is provided in the hard slope, and an anchor with a blade is placed in the hole and the head is protruded. From sand, 86 to 92% by weight, water, binder, and greening base material A sand base layer having a thickness of 6 to 30 cm is formed by spraying the base sand to be planted on a thick layer base material composed of an organic active fertilizer, a humic acid substance, a polymer agglomerated material, and a mineral fired lightweight material. A seed is added and sprayed to form a two-layer vegetation deep bed layer having a thickness of 8 to 38 cm.

  In this method, as a slope protection, concrete mortar, etc. is sprayed in advance, and a water-permeable base layer is formed against the state where water permeability such as rainwater has been deprived. A large number of anchors with blades will be driven.

  In consideration of the natural environment, it has been desired to form a protective layer that does not use artificial structures such as piles or wire mesh, and that does not use non-permeable materials such as concrete and mortar for slope protection. .

Japanese Unexamined Patent Publication No. 7-119152 (second page, FIG. 1)

  The present invention provides a slope protection layer with water retention and water permeability and a vegetation layer on top of it without using artificial structures such as piles or wire mesh, and enables greening even if the layer thickness is thin. To provide a slope greening method.

  In order to solve the above-mentioned problem, the slope revegetation method of the present invention comprises a bark material having a water content of 50 to 60% and a particle size of 15 to 20 mm, cement of 5 to 15% by weight with respect to the bark material, 2 to 7.5% by weight cement solidifying material and 0.8% by weight cement bonding material and 60 to 100% by weight water are kneaded and sprayed to a thickness of 10 to 20 mm on the slope. A protective layer is formed, and an organic base material such as bark, peat moss, and humus made of crushed wood bark, etc. on the surface, and a vegetation base material mixed with seeds in the soil, etc. are sprayed to a predetermined thickness to form a vegetation layer It is characterized by doing.

  Further, the thickness of the vegetation layer is arbitrarily set between 20 mm and 50 mm according to the vegetation plant.

  According to the present invention, the main material of the slope protection layer has a high water content and a water retention-rich bark material that is bonded to the cement with a high binding force, functions as slope protection, and is vegetated. It allows plant roots to enter and functions as a water supply source.

  In addition, bark becomes soil due to secular change, and as the plant grows, its roots reach the base of the slope to protect the slope by vegetation.

  Furthermore, since the slope protection layer is mainly composed of bark material produced from waste wood or thinned wood, the cost can be greatly reduced compared to the conventional concrete / mortar protection layer.

  Furthermore, the slope protection layer does not use artificial structures such as wire nets and piles, and can further reduce the use of cement to 5 to 15% by weight, thereby minimizing natural destruction from the viewpoint of environmental protection. It is effective.

  Furthermore, in this construction method, by mixing and spraying a solidifying agent to cement, the slope protection layer is stabilized in a short time after spraying, and the vegetation layer can be sprayed continuously. For this reason, a construction period can be shortened.

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

  FIG. 1 is a diagram showing a construction mode by a two-layer slope greening method, (a) is a sectional view of a construction example in which the whole is two layers, and (b) is a two-layer only slope slope It is sectional drawing which shows the construction example.

  In FIG. 1A, A indicates a slope, and C indicates a lower portion of the slope A such as a road surface.

  In the slope greening method of the present invention, first, a bark material 10 a which is a main material of the slope protective layer 10 is prepared. The bark material 10a has a particle size of 15 mm to 20 mm. Further, the water content is adjusted to 50 to 60%.

Next, 5 to 15% by weight of cement 10b with respect to the bark material 10a, 2 to 7.5% by weight of cement solidifying material 10c and 0.8% by weight of cement bonding materials 10d and 60 with respect to the cement 10b. ~ 100 wt% of water is kneaded and sprayed on the cut slope A to form the slope protection layer 10.

  Normally, if only cement is used, it takes time from spraying to solidification, so only the bark material is exposed, and the mixture of cement and water that should act as a binder is slope A or the lower part of slope A. In the present invention, cement is entangled with the bark material 10a having a large particle size, and the bark material 10a is a binder made of cement. Forming a layer having

  Moreover, the surface of the slope is protected by the solidified cement. The slope protection layer 10 has a thickness of 10 to 20 mm and exhibits a sufficient slope protection effect.

  Next, an organic base material 20b such as bark, peat moss, and humus made of crushed wood bark, etc., and a vegetation base material in which seeds 20a are mixed into the soil and the like are sprayed to a predetermined thickness to form a vegetation layer 20.

  The vegetation layer 20 is arbitrarily set in a range of 20 to 50 mm corresponding to the type of vegetation.

  FIG. 1B shows an embodiment in which the slope protection layer 10 is sprayed from the slope A to the slope upper shoulder B, and the vegetation layer 20 is sprayed only on the slope A. In this construction example, the embankment D In contrast, it is possible to prevent rainwater from penetrating directly, and to prevent slope failure due to swelling.

  FIG. 2 is an enlarged cross-sectional view of each layer of slope greening of the present invention.

  The slope protection layer 10 sprayed on the ground surface of slope A is a layer in which the bark material 10a is kneaded with the solidified material 10c added to the cement 10b, the bark materials 10a are bonded to each other, and the gap is water-permeable. Is formed.

  Moreover, since the bark material 10a itself is excellent in water retention, it absorbs rainwater soaked and retains water. For this reason, from the vegetation layer 20 sprayed on the upper part of the slope protection layer 10, the root of a plant can extend in the slope protection layer 10, and it can grow by sucking the water | moisture content stored in the bark material 10a.

  The vegetation layer 20 is formed by mixing and spraying seeds 20a on an organic base material 20b such as bark, peat moss or humus.

  Corresponding to the plant to be vegetated, a predetermined amount of soil is mixed in the vegetation layer 20.

  In this construction method, when the vegetation grows and the slope protection layer 10 is filled with the roots of the vegetation, the bark material 10a is decomposed and gradually changed to soil. For this reason, a work such as a metal or a petrochemical frame as in the conventional method does not remain.

  In addition, as the cement solidifying material 10c used for the construction method of the present invention, it is desirable to use a cement quick setting material with a small amount of alkaline components.

  Moreover, according to this construction method, a protective layer having water retention can be formed at a low cost along the surface even on a rough surface having irregularities on the slope.

It is a figure which shows the form of construction by the 2 layer slope greening method of this invention, (a) is sectional drawing of the construction example which made the whole 2 layers, (b) is the construction which made only the slope slope 2 layers. It is sectional drawing which shows an example. It is an expanded sectional view of each layer of slope greening of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Slope protection layer 10a Bark material 10b Cement 10c Solidification material 10d Joining material 20 Vegetation layer 20a Seed 20b Organic base material A Slope B Slope upper shoulder C Road surface D Embankment

Claims (2)

  A bark material having a moisture content of 50 to 60% and a particle size of 15 to 20 mm, 5 to 15% by weight cement with respect to the bark material, and 2 to 7.5% by weight cement cement with respect to the cement; 0.8% by weight cement bonding material and 60 to 100% by weight water are kneaded, and a slope protection layer is formed on the slope by spraying to a thickness of 10 to 20 mm. A two-layer face revegetation method characterized in that a vegetation layer is formed by spraying a vegetation base material in which seeds are mixed into an organic base material such as bark, peat moss, and humus, and soil, etc. to a predetermined thickness.   The thickness of the said vegetation layer is arbitrarily set between 20 mm-50 mm according to a vegetation plant, The two-layer slope revegetation method of Claim 1 characterized by the above-mentioned.

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