JP2008057262A - Planting and greening method using covering type rock fall prevention net - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of semi-permanently using a covering type rock fall prevention net for covering a slope, a method of protecting a slope top portion that is susceptible to weathering, and a method of improving the landscape and reducing reflection of sunlight. <P>SOLUTION: There is provided a planting and greening method using the covering type rock fall prevention net. According to the method, the covering type rock fall prevention net is employed as a planting net, and a planting mat body which encapsulates Western turf seeds forming a substrate of planting, is firmly laid over the entire area of the slope top portion of the rock fall prevention net covering the entire slope, followed by planting intermediate- and low-height trees on the surface of the planting mat body by using Western turf and slide anchor pins, to thereby protect the slope top portion with the planting mat body and planting roots. Further the intermediate- and low-height trees are planted on the slope by using TK claw anchors, and therefore rock fall is doubly protected by the rock fall prevention net and the planted roots. Furthermore, landscape recovery and prevention of sunlight reflection are achieved by planting and greening. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a planting tree planting method for a fallen rockfall protection net that prevents the weathering of the slope and improves the landscape by greening planted trees on the fallen rockfall protection net stretched on the slope to prevent falling rocks in advance. Is.

  In Japan, where mountainous areas account for about 70% of the national land, various slope protection methods have been devised because disaster prevention measures are indispensable, including all topographical and geological problems associated with the development and development of road traffic networks. It has been constructed. In particular, a lot of slope protection using a rockfall protection net has been introduced to prevent disasters caused by rockfall. However, the fall rock protection net is a temporary installation that holds down fall rocks, and there is a shortcoming that must be replaced due to damage to the net in a short period of time, and there is no method to promote the advance of natural vegetation. In addition, with the weathering of natural ground, bare land has progressed and it does not match the surrounding landscape, giving it a sense of incongruity and reflecting sunlight to contribute to a rise in temperature.

Therefore, in order to solve such problems, a pocket for retaining soil was provided between the rock fall protection net and the natural ground, and a method (Patent Document 1) or a mat shape was formed to capture fallen leaves and fall rock soil to plant trees. There is a construction method (Patent Document 2) in which greening customer soil is laid on a slope, a thick net is laid on it, a rope is connected to a tension anchor, and the thick net is fixed (Patent Document 2). It was not possible to construct it on the existing rock fall protection net only at the point where it was done.
Japanese Patent Laid-Open No. 10-227034 JP 2006-28802 A

  Based on this reality, the existing and new overturning rock protection nets can be used semipermanently, and the vegetation restoration to the slope is promoted, and the scenery is improved and the slope protection is carried out. Technology development.

In order to use the existing and new overturning rockfall protection nets semipermanently and to promote the restoration of vegetation on the slope, a thin planting mat body is put on the shoulder area, and herbs on the mat body And plant a medium shrub. In addition, planting middle shrubs at multiple locations on the overturning rockfall protection net, and double-protecting and greening the slope with the overturning rockfall protection net and the planted tree roots, the original purpose rockfall Strengthen the prevention effect of the vegetation, combine the vegetation recovery promotion effect, suppress the improvement of the landscape and the reflection of sunlight, and suppress the temperature rise. Development of the above mat body and construction method using it.

  Each of the above thin planting mat bodies is made of a material that resists corrosion and is made of a polyethylene plain woven net sheet that passes through the roots of the plant, a polyester water retaining sheet and a polyester nonwoven fabric in this order, and a light and water retaining property. Spread a high vegetation base soil (artificial soil with organic fertilizer, slow-acting fertilizer, chemical fertilizer and turf seed added to mixed soil of coco pate, moss, bark compost, peat moss, wood and grass charcoal) about 5 cm thick The upper part is formed in the order of polyester nonwoven fabric through which the buds and roots of plants pass, polyethylene plain weave net sheet, and polyethylene net sheet attached with edge ropes. A sloping shoulder that is sewn with a thread that does not corrode at intervals, and is attached to a thin planting mat with an edge rope around the four sides. 1m wide) laid in the net over the entire surface, by the edge ropes at about 50cm interval fixed by anchor pin fixing without damaging to the thin planting mat body.

Next, arrange 2 to 3 seedlings per m ² of the middle shrubs that protected the root pot part with a root pot protection ring that processed the resin net board into a ring shape on the surface of the thin planting mat body, Cover the planting base soil to a thickness of about 1 cm so that the roots of the planted tree are in close contact with the mat body and the tree roots can easily enter the mat body, and a plurality of planted trees protected by a root pot protection ring are placed on top of it. Insert the slide anchor pin into the net-shaped sheet from the position below the outer circumference circle of the root pot protection ring to the center point of the root pot and slide it, and turn the fixing band to the locking part of all anchor pins to narrow down the root pot. Secure the guard ring. Cover the vegetation base soil in a mound shape so as to cover the root pot protection ring on it, and cover and bind the root pot part with a nonwoven fabric and net-like sheet so that the vegetation base soil does not flow out due to wind and rain etc. By binding and fixing to the net-like sheet on the mat surface with a plurality of trees, planted trees can be planted without the vegetation base soil flowing out, and greening protection with the grass seeds in the mat body is aimed at.

Furthermore, on the covered rockfall protection net covering the slope, the rooted middle shrub is fixed to the natural ground using a TK claw anchor at a rate of about 1 in 5 m ^2, and this is used as a planting base soil. A thick layer base material sprayed with 5 cm to 10 cm thick turf seeds is planted in the root pot and about 50 cm around it. Eventually the turf and planted trees grow and the roots become one with the ground, and the slope is double protected with a fallen rockfall protection net to prevent bare land formation and suppress the formation of a good landscape and reflection of sunlight. This is a fallen rockfall protection net planting planting method that suppresses temperature rise.

By fixing the edge rope of the thin planting mat body, it can be installed on the shoulder of the fall-type rockfall protection net without scratching the mat body, and fixing the slide anchor pin etc. without scratching the mat body surface By being able to plant middle shrubs using tools, there is no outflow of vegetation base soil with high water retention in the thin planting mat body, so it is possible to grow planted trees etc. over a long period of time. Yes, planting trees and turf cover the shoulders of the fallen rockfall protection net to prevent weathering and form a good landscape.

In addition, the place where the overturning rockfall protection net covering the slope is in close contact with the natural ground, the tree planted at a rate of about 1 in about 5 m ² was planted using TK claw anchor pins By extending the roots to the ground without strong winds and vibrations and scattering and falling trees, the fallen rockfall protection net and the planting roots prevent double falling rocks and cover the surface of the net with planting trees and grass This is a reversible rockfall protection net planting planting method that can suppress the reflection of sunlight and suppress the temperature rise and improve the speed of good natural landscape restoration, and can protect rockfall with planted plants for many years.

  FIG. 1 (a) is a perspective view of the thin planting mat body 1, and (b) is an explanatory view showing the structure of the thin planting mat body 1, which is not easily corroded and is made of a material that allows passage of plant buds and roots. A vegetation base soil 5 (cocopyt, peat moss, charcoal charcoal) with a strong water-retaining and fertilizing power on the bottom, in the order of a polyethylene net-like sheet 2, a polyester nonwoven fabric 3, and a polyester water-retaining sheet 4 Lay a 5cm thick layer of grain, water moss, bark compost, organic fertilizer, slow-acting fertilizer, and chemical fertilizer mixed with 5cm thick, and then polyester 3 nonwoven fabric, polyethylene plain weave net sheet 6 and edge rope The upper part is formed by overlapping the attached polyethylene net-like sheet 7 in order, and the bottom part and the upper part are integrated with a sewing thread 8 made of polyester at regular intervals so that the bottom part and the upper part are integrated to prevent the movement of the vegetation base soil 5. It was a flat-screen planting mat body 1.

  FIG. 2 shows a mechanism for planting a planted tree in a stable state. (I) is an auxiliary tool for planting and fixing planted trees in a stable state, and shows a root pot protection ring 9 obtained by processing a resin perforated plate into a ring shape that is slightly larger than the root pot of the planted tree. Yes, (b) inserts the root winding part 11 of the planted tree 10 rooted in the root pot protection ring 9 and the vegetation base soil 12 kneaded with water, and covers the ground without any gaps so that the root pot bottom becomes flat, A planting tree 10 housed in a root pot protection ring 9 in a stable planting state.

  FIG. 3 explains the mechanism of the slide anchor pin. (A) is a slide in which a long metal rod is provided with a horizontal locking insertion portion 13a, a support portion 13b rising upward from one end thereof, and an annular band locking portion 13c provided on the head. (B) supports a root pot protection ring that protects the root pots of planted trees while sliding the plurality of slide anchor pins 13. Then, the ring-shaped band 14 is locked to the ring-shaped band locking portion 13c on the head of the support section and narrowed down so that the planted tree is planted and fixed so as not to fall down due to wind and rain.

  FIG. 4 illustrates a method of planting on the shoulder portion of the fallen rockfall protection net. (I) is a thin planting mat body 1 with turf seeds laid on the slope of the slope where the overturning rock protection net 15 is stretched, and the edge rope is fixed with anchor pins 16, and the thin planting is carried out. The state which fixed the planting tree 10 to the planting position of the mat body 1 surface is shown, (b) is the explanatory drawing which fixed the planting tree 10 to the thin planting mat body 1, and the planted tree stored in the root pot protection ring 9 10 is arranged at the planting position of the thin planting mat body 1, and the locking insertion part 13 a of the slide anchor pin 13 is slid under the root pot protection ring 9 to 3 to 4 places around the root pot protection ring 9. As described above, through the mesh of the net-like sheet on the surface of the thin planting mat body 1, the annular band 14 is circularly engaged with the annular band engaging portion 13 c of each support portion head of the slide anchor pin 13, By squeezing the annular band 14, the root pot protecting ring 9 is By being fixed to a thin planting mat member 1 surface planted trees 10 or perennial plants are planted without falling.

  FIG. 5 shows that the root pot protection ring 9 in which the root pot protection ring 9 in which the root pots such as planted trees are accommodated on the surface of the thin planting mat body 1 is fixed using the slide anchor pin 13 and the annular band 14 is covered. The surface is covered with a planting base soil 12 in the form of a mound, and the surface is covered with a non-woven fabric 3 through which water is passed so that the planting base soil 12 does not scatter and flow out due to wind and rain, etc. After covering, the peripheral edge of the net-like sheet 2 is bound and fixed to the net-like sheet on the surface of the thin planting mat body 1 with a plurality of binding bands 17.

  FIG. 6 shows a mechanism for fixing a planted tree or the like by the TK claw anchor. (A) is formed with a mountain-shaped locking portion 20 in a multi-stage shape at predetermined intervals on the side peripheral surface of the long reinforcing bar 19, and a pointed insertion portion 21 is formed at the lower end thereof. The anchor main body 18, the locking cylinder 22 having a through hole through which the anchor main body 18 is inserted, and the locking cylinder 22 as a base, a plurality of claw portions 23 are formed so as to protrude outward in a fan shape. (B) is a TK claw anchor 25 by inserting the locking cylinder 22 of the claw 24 into the reinforcing bar 19 of the anchor body 18, and (c) is a claw. When a push-up load is applied to the claw portion 23 of 24 from below, the locking cylinder 22 of the base portion tilts and the edge of the tube port engages with the angled locking portion 20 of the reinforcing bar 19, and the reinforcing bar It is a figure explaining the state fixed to 19 arbitrary positions and united with an anchor.

FIG. 7 illustrates a method of planting on a falling rockfall protection net covering the slope. (A) is the whole figure which fixed the planting tree 10 with the TK claw anchor in the ratio of one place about 5 m < ² > on the covering type rock fall protection net 15 which covers the slope. (B) is an explanatory diagram in which the planted tree 10 is fixed on the overturning rockfall protection net 15. First, the planted tree is arranged at the planting position, and the head of the anchor body (rebar bar 19) is planted at the planting location with a hammer drill. A hole is drilled vertically until about 20-30 cm remains, and the anchor body is driven in. The planting root pot 11 is placed so that the rear part of the planting root pot 11 is perpendicular to the anchor body, and the claw is inserted into the reinforcing bar 19 of the anchor body. By pressing the root pot 11 portion of the planted tree 10 with the claw portion 23 of the claw and placing the rear portion, the locking cylinder 22 is tilted and the end of the tube mouth is the angled locking portion of the reinforcing bar 19 20 is engaged and fixed to the TK claw anchor 25, and the planting root pot is planted and fixed.

FIG. 8 shows a root pot portion of a planted tree 10 fixed with a TK claw anchor 25 on an overturning rock protection net 15 and bark compost, peat moss, turf seed, fertilizer, and adhesive as a vegetation base soil around it. It is a side view which shows the state which performed covering by the thick base material spraying 26 mix | blended by about 5-10 cm thickness.

  FIG. 9 is a completed drawing planted on the fallen rockfall protection net, and the shoulder of the fallen rockfall protection net is designed to prevent weathering with the thin planting mat body 1 and the turf 27 or the planted tree 10. The slope is covered with a TK claw anchor by planting the planted tree 10 on the ground, growing without falling down in strong winds, and fixing it on the ground while entwining the roots with the fallen rock protection net 15. A natural landscape can be formed by double rockfall protection with a rockfall protection net and planted tree roots and greening of planted trees.

  Overturning rockfall protection net planting tree planting method uses a root-plant protection ring and a slide anchor pin on a thin planting mat laid on the shoulder, and a TK claw anchor on the slope. & It is highly likely to be used as a construction method for the fallen rockfall protection net construction to prevent the weathering of the slope and the prevention of falling rocks and to promote the restoration of natural scenery.

It is sectional drawing which shows the perspective view and cross section of a thin planting mat body. It is explanatory drawing to plant and fix a planted tree in a stable state, (a) shows a perspective view of root pot protection ling, (b) shows the root winding and vegetation base soil of the plant tree in the root pot protection ring It is explanatory drawing stuffed and planted. It is explanatory drawing explaining the mechanism of a slide anchor pin, (A) is a perspective view which shows the combined state of several locking pins and an annular band, (B) is an annular wire locking part of a support part head. It is a perspective view which shows the state which latched the cyclic | annular band, squeezed this, and squeezed the root pot protection ring to the support | pillar part. It is explanatory drawing planted on the shoulder of a fall type rock fall protection net, (i) shows the state where the planted tree is fixed on the thin planting mat body laid on the shoulder of the fall type rock fall protection net It is a perspective view, (b) is an explanatory view of fixing a planting tree on a thin planting mat body. It is explanatory drawing which fixed the planting tree on the thin planting mat body, covered the root pot protection ring with the vegetation base soil, and protected it with the nonwoven fabric and the net-like sheet. It is explanatory drawing explaining the mechanism of TK claw anchor, (A) is a perspective view which shows the pin main body and root wound holding nail | claw body which are the structural members of TK claw anchor, (B) is the state which combined TK claw anchor (C) is an explanatory view in which a locking cylinder is fixed to a pin body of a TK claw anchor. It is explanatory drawing which fixes a planting tree on the fall type rock fall protection net which covers the slope, (a) is a perspective view which shows the state where the planting tree was fixed on the fall type rock fall protection net, and (b) is a cover. It is explanatory drawing by which a planting tree is fixed on a type rock fall protection net. It is a side view which shows the state which covered the vegetation base soil around the root pot part which fixed the planting tree on the fall type rock fall protection net. It is a completion perspective view of one Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thin planting mat body 2 Net-like sheet 3 Nonwoven fabric 4 Water retention sheet 5 Base soil 6 Plain weave net sheet 7 Net-like sheet attached with an edge rope 8 Sewing thread 9 Root pot protection ring 10 Planting tree 11 Neck winding part 12 Vegetation base soil 13 Slide anchor pin 13a Locking insertion part 13b Supporting part 13c Annular band locking part 14 Annular band 15 Overturning rockfall protection net 16 Anchor pin 17 Binding band 18 Anchor body 19 Rebar rod 20 Angle locking part 21 Inserting part 22 Engagement Stop cylinder 23 Claw 24 Root pot holding nail (claw)
25 TK claw anchor 26 Thick layer base material spray 27 Yashiba

Claims (1)

A thin planting mat body that is difficult to humate and has turf seeds embedded in all shoulders of the fallen rockfall protection net is fixed with an anchor pin, and a slide anchor pin is used on the surface of the thin planting mat body. Planting shrubs to prevent weathering of the slope mountain and TK claw anchor pin and thick substrate at a rate of about 1 in 5m ² of the area where the slope ground and the rockfall protection net are in close contact The fallen rockfall is characterized by stabilizing the slope with the roots of the planted tree by planting the middle shrub using spraying, and improving the landscape-forming ability with the planted middle shrub Protective net planting planting method.

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