JP4611124B2 - Natural restoration method - Google Patents

Natural restoration method Download PDF

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JP4611124B2
JP4611124B2 JP2005168669A JP2005168669A JP4611124B2 JP 4611124 B2 JP4611124 B2 JP 4611124B2 JP 2005168669 A JP2005168669 A JP 2005168669A JP 2005168669 A JP2005168669 A JP 2005168669A JP 4611124 B2 JP4611124 B2 JP 4611124B2
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seedling
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JP2006342572A (en
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雨貝洋
中野裕司
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株式会社水戸グリーンサービス
中野 裕司
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Description

本発明は、硬質切土法面や岩盤法面に対し苗木を導入して樹林化を図る置苗用基盤保持固定具を用いた自然修復法面工法に関するものである。
The present invention relates to a natural rehabilitation slope construction method using a seedling-holding base-holding fixing tool for introducing a seedling into a hard cut slope or a rock slope to form a forest.

切土斜面等の法面の侵食を防止して安定化を図る手法のひとつとして、初期生長が速く発芽時期が同時期の外来の緑化牧草を大量に播種して、短期間で法面を緑化する急速緑化工法が知られている。   As one of the methods to prevent and stabilize the slopes of cut slopes, etc., a large amount of exogenous greening grass with fast initial growth and the same germination time is sown so that the slopes can be greened in a short period of time. The rapid greening method is known.

また硬質切土法面や急勾配岩盤法面に対しては、苗木を用いて樹林化する以下の植栽工法が知られている。
(a)土留客土して植栽する方法。
(b)厚層基材吹付工により造成した植物生育基盤に苗木を植え付けるか、或いはマット状の苗木を張り付ける方法。
(c)地山上に苗木を設置した後、厚層基材吹付工により根締めを行いながら植物生育基盤の造成を行う苗設置吹付工。
For hard cut slopes and steep slope slopes, the following planting methods that use saplings to make trees are known.
(A) A method of planting on soil.
(B) A method of planting a seedling on a plant growth base formed by a thick layer base material spraying method, or a method of attaching a mat-shaped seedling.
(C) A seedling installation sprayer that constructs a plant growth base while rooting with a thick-layer base material sprayer after setting a seedling on the ground.

また上記した植生工法と植栽工法を併用することも知られている。
It is also known to use the above-mentioned vegetation method and planting method together.

従来の緑化技術には、つぎのような問題点がある。
(1)リオサミット以降、持続可能な社会形成のため、地球環境への配慮と生物多様性に配慮した開発を行うことが求められ、これを受けて生物の多様性と遺伝子レベルにまで配慮した豊かな自然の回復を目的とした緑化が求められる。
従来の草本類を用いた植生工法や苗木を用いた植栽工法は、共に法面の浸食防止を主目的とした防災と景観的な観点から開発されたものであるため、上記した生物の多様性と遺伝子レベルにまで配慮した豊かな自然の回復に対応できず、従来工法の見直しを迫られている。
The conventional greening technology has the following problems.
(1) Since the Rio Summit, in order to form a sustainable society, it has been required to develop with consideration for the global environment and biodiversity. Greening for the purpose of restoring rich nature is required.
The conventional vegetation method using herbs and the planting method using seedlings are both developed from the viewpoint of disaster prevention and landscape with the main purpose of preventing erosion of the slope. Because it cannot cope with the restoration of rich nature that takes into consideration the sex and gene level, it has been forced to review the conventional construction method.

(2)植生工法と植栽工法を併用する方法も知られている。この場合、牧草と苗木を同時に生育させるために、生長の速い牧草により初期生長の遅い苗木が被圧される場合が多い。これを避けるために、植物生育基盤の保持のため併用する牧草等の草本類を少なくすることが行われるが、牧草の量が少なく生育しないと裸地状の期間が長く続き、植物生育基盤が風化して安定保持効果が数年で消失してしまうために、苗木が繁茂する前に植物生育基盤が剥落するといった問題がある。 (2) A method using both the vegetation method and the planting method is also known. In this case, in order to grow the grass and the seedlings at the same time, the seedlings having a slow initial growth are often pressed by the fast-growing grass. In order to avoid this, it is necessary to reduce the amount of herbs such as grass to be used together to maintain the plant growth base. Since the stable retention effect disappears in several years due to weathering, there is a problem that the plant growth base is peeled off before the seedlings grow.

(3)さらには、植物生育基盤の表層が風化して膨軟化すると、セイタカアワダチソウ、アメリカセンダングサ等の肥沃な土壌を好む強害雑草が侵入してその定着範囲が拡張化するために、苗木を被圧して樹林化が著しく阻害されて遅滞する。
そのために、景観の悪化や景観不良をもたらし、周辺の在来植物の侵入定着による自然回復が期待できない。
(3) Furthermore, when the surface layer of the plant growth base is weathered and softened, strong weeds that prefer fertile soil, such as black-tailed hawksaw and American Sendangsa, invade and the establishment range is expanded. The forestation is significantly hindered and delayed.
For this reason, the scenery is deteriorated and the scenery is poor, and natural recovery due to the invasion and settlement of surrounding native plants cannot be expected.

(4)硬質切土法面、急勾配岩盤に対して苗木を導入する場合、ポット苗木の安定性を確保することが重要である。
従来は、例えば苗設置吹付工に代表されるように、法面に敷設した金網にポット苗木を結束して固定した後に、植物生育基盤を吹付けて根締めを行っている。
しかしながら、金網に下部面積の小さなポット苗木を固定することは困難な作業を強いることになり、また、ポット苗木の根鉢を埋め込み可能なように植物生育基盤を厚く造成する必要があるため、比較的薄層な植物生育基盤の造成により生育可能な一般の牧草、木本ハギ類等の播種により植物を導入する場合と比べて経済性の点で劣ることとなる。
また、苗木の安定を図るために支柱を設ける方法も知られているが、急勾配の法面への支柱の取付作業が困難であるために、大型苗木の導入が困難であった。
(4) When introducing seedlings to hard cut slopes and steep rocks, it is important to ensure the stability of pot seedlings.
Conventionally, as typified by, for example, a seedling installation sprayer, a pot seedling is bound and fixed to a wire mesh laid on a slope, and then a plant growth base is sprayed to perform root tightening.
However, fixing a pot seedling with a small bottom area to a wire mesh will be difficult work, and it is necessary to create a thick plant growth base so that the root pot of the pot seedling can be embedded. This is inferior in terms of economy compared to the case of introducing plants by sowing general grass, wood hagi, etc. that can grow by building a thin-layer plant growth base.
Also, a method of providing a support to stabilize the seedling is known, but it is difficult to install a large seedling because it is difficult to attach the support to a steep slope.

(5)ポット苗木の欠点を解消するため、根鉢を薄い立方体に形成して根鉢の安定性を良くした薄鉢の苗木(薄鉢コンテナ)が提案された。
この薄鉢コンテナは植物生育基盤の造成厚を薄くする利点があるものの、特殊容器を用いて根鉢形状を薄い立方体の形状に形成する必要がある。
そのために、あらかじめ使用量を見込んで薄鉢コンテナの栽培を数年スパンで計画している間に使用量に変更があると、大量在庫を抱えたり、不足を生じて施工に間に合わないといった問題が起きる。
また、植物生育基盤を均一厚に造成するために、苗木が繁茂することに伴い、下草が失われ、根系による緊縛力を失って植物生育基盤が崩落し易くなる問題もある。
(5) In order to eliminate the disadvantages of pot seedlings, a thin pot seedling (thin bowl container) was proposed in which the root pot was formed into a thin cube to improve the stability of the root pot.
Although this thin bowl container has an advantage of reducing the thickness of the plant growth base, it is necessary to form a root pot shape into a thin cubic shape using a special container.
For this reason, if the usage is changed while planning the cultivation of thin bowl containers in the span of several years in anticipation of the usage, there are problems such as having a large amount of inventory or shortage and not being in time for construction. Get up.
In addition, in order to create a plant growth base with a uniform thickness, as the seedlings grow, undergrowth is lost, and there is also a problem that the plant growth base is liable to collapse due to the loss of the binding force by the root system.

本発明は、以上の点に鑑みて成されたもので、その目的とするところは、つぎの何れかひとつの置苗用基盤保持固定具を用いた自然修復法面工法を提供することにある。
(1)周辺の在来植物の侵入および定着が容易に行え、生物の多様性と遺伝子レベルにまで配慮した豊かな自然の回復に対応できること。
(2)効率的に苗木の固定を図ると共に、植物生育基盤の安定を確保すること。
(3)苗木に一般に流通している経済的なポット苗木を使用できること。
(4)急勾配の法面に大型苗木の導入が可能となること。
The present invention has been made in view of the above points, and an object of the present invention is to provide a natural restoration slope method using any one of the following seedling holding base fixtures. .
(1) Invasion and settlement of surrounding native plants can be easily performed, and it is possible to cope with the restoration of abundant nature that takes into account the diversity of organisms and the genetic level.
(2) To efficiently fix seedlings and ensure the stability of the plant growth base.
(3) The use of economical pot seedlings that are generally distributed to seedlings.
(4) Large seedlings can be introduced on steep slopes.

本願の第発明は、法面に点在して配置され、植物生育基盤を保持する保持帯と、法面に配置した苗木の根鉢と共に前記保持帯を法面に固定する固定手段とにより構成する置苗用基盤保持固定具を用いて法面に苗木を配置した後、苗木の周囲に植物生育基盤を造成して法面を自然修復する工法であって、前記置苗用基盤保持固定具を構成する保持帯の内方に、法面に着床させて苗木の根鉢を配置すると共に、固定手段により前記置苗用基盤保持固定具と苗木を共通して法面に固定し、保持帯の内部に、苗木の根鉢が隠れるまでマウンド状に植物生育基盤を造成し、マウンド状の植物生育基盤と植物生育基盤の間に裸地を残し、この裸地に周辺自然植生の侵入できる空間を設けたことを特徴とする、自然修復法面工法を提供する。
本願の第2発明は、前記第発明において、マウンド状の植物生育基盤と植物生育基盤の間に残された裸地にマルチング部を造成したことを特徴とする、自然修復法面工法を提供する。
本願の第3発明は、前記第発明において、マウンド状の植物生育基盤と植物生育基盤の間に残された裸地にマルチング部を造成して裸地の風化を抑制したことを特徴とする、自然修復法面工法を提供する。
本願の第4発明は、前記第発明において、マウンド状の植物生育基盤と植物生育基盤の間に残された裸地に施工地近傍で採取された埋土種子を含む表土を植生基盤材と共に吹付けたことを特徴とする自然修復緑化方法を提供する。
1st invention of this application is comprised by the holding | maintenance belt | band | zone which is scattered in the slope and hold | maintains a plant growth base, and the fixing means which fixes the said retention belt | band | zone to a slope with the root pot of the seedling arranged on the slope face A method for constructing a plant growth base around a seedling and naturally restoring the slope after placing the seedling on the slope using the base holding fixture for placement seedling, wherein the base holding fixture for placement seedling The seedling root pot is placed on the sloped surface inside the holding band constituting the holding band, and the basement holding fixture for seedlings and the seedling are fixed to the slope in common by the fixing means, and the holding band A plant growth base is built in the shape of a mound until the root pots of the seedlings are hidden inside, leaving a bare ground between the mound-like plant growth base and the plant growth base, and a space where the surrounding natural vegetation can invade into this bare ground. Providing a natural restoration slope construction method characterized by the provision of
The second invention of the present application provides a natural restoration method surface construction method according to the first invention, characterized in that a mulching portion is formed on the bare ground left between the mound-like plant growth base and the plant growth base. To do.
A third invention of the present application is characterized in that, in the first invention, a mulching portion is formed in the bare ground left between the mound-like plant growth base and the plant growth base to suppress weathering of the bare ground. Provide a natural restoration method .
According to a fourth invention of the present application, in the first invention, a topsoil containing buried seeds collected in the vicinity of the construction site in a bare land left between the mound-like plant growth base and the plant growth base is combined with a vegetation base material. A natural restoration greening method characterized by spraying is provided.

本願の第5発明は、前記第1発明乃至第4発明の何れかにおいて、前記保持帯に遮水材を付設して貯水部を形成したことを特徴とする自然修復緑化方法を提供する。
本願の第6発明は、前記第1発明乃至第5発明の何れかにおいて、保持帯が生分解性素材で形成されていることを特徴とする自然修復緑化方法を提供する。
A fifth invention of the present application provides the natural restoration greening method according to any one of the first to fourth inventions, wherein a water storage portion is formed by attaching a water shielding material to the holding band .
A sixth invention of the present application provides the natural restoration greening method according to any one of the first to fifth inventions, wherein the holding band is formed of a biodegradable material .

また本発明は苗木と共に保持帯を法面に固定する固定手段として長尺のアンカーピンを使用し、地上に突出させたアンカーピンの突出部を支柱として苗木を支えるようにしてもよい。
In the present invention, a long anchor pin may be used as a fixing means for fixing the holding band to the slope together with the seedling, and the seedling may be supported by using the protruding portion of the anchor pin protruding to the ground as a support.

(1)置苗用基盤保持固定具は簡単な構造であるため製作が容易であるだけでなく、軽量であるため取り扱いが便利である。
(2)置苗用基盤保持固定具に形成した貯水部に雨水を貯水できるので、植物生育基盤の保水性がよくなる。
そのため、乾燥の激しい硬質切土法面や急勾配岩盤法面に対する苗木の活着を良好とすることが可能となる
(3)一つの固定手段で以って、置苗用基盤保持固定具と苗木の固定に兼用できるので、複数のピンで個別に固定する場合と比べて使用数と固定回数を削減できて、効率的である。
また、固定手段にアンカーピンを使用した場合は、固定機能だけでなく、地上に突出させた突出部を苗木を安定させる支柱機能を併有させることができる。
(4)効率的に苗木の固定が図られると共に、植物生育基盤の安定した保持が可能となる。
(5)マウンド状の植物生育基盤と植物生育基盤の間に裸地を残したことにより、周辺の在来植物の侵入および定着が容易に行え、生物の多様性と遺伝子レベルにまで配慮した豊かな自然の回復に対応できることが可能となる。
(6)苗木に一般に流通しているポット苗木を使用した場合は、設計計画に大幅な変更を生じたときでも苗木の過不足の対応が容易である。
(7)デザイン、及び経済性に配慮して、苗木の配植位置や密度を自在に調整することができる。
(8)マウンド状の植物生育基盤と植物生育基盤の間をマルチングすることにより、乾燥防止と共に地山の風化を防止できる。
(9)マウンド状の植物生育基盤と植物生育基盤の間に埋土種子混在表土を用いた、あるいは、混合したマルチングを行うことにより、遺伝子レベルにまで配慮した自然修復を早期に行うことができる。
(10)マウンド状の植物生育基盤に野鳥を誘致する実を付ける樹木(食餌木)を繁茂させることにより野鳥を誘致し、その糞中に含まれる種子の発芽を活用することで、遺伝子レベルにまで配慮した自然修復を速やかに行うことができる。
(1) The substrate holding fixture for placement seedling is not only easy to manufacture because of its simple structure, but also convenient to handle because of its light weight.
(2) Since rainwater can be stored in the water storage part formed in the seedling-holding base holding fixture, the water retention of the plant growth base is improved.
Therefore, it is possible to improve the survival of seedlings on hard cut slopes and steep rock slopes that are drastically dry. (3) With one fixing means, a base holding fixture for seedlings and seedlings can be obtained. Therefore, the number of uses and the number of times of fixing can be reduced compared to the case of fixing individually with a plurality of pins, which is efficient.
In addition, when an anchor pin is used as the fixing means, not only the fixing function but also the support function for stabilizing the seedling can be provided at the protruding portion protruding on the ground.
(4) The seedlings can be efficiently fixed and the plant growth base can be stably maintained.
(5) By leaving bare ground between the mound-like plant growth base and the plant growth base, invasion and colonization of surrounding native plants can be easily performed, and richness considering the diversity of organisms and gene level It is possible to cope with natural recovery.
(6) When pot seedlings that are generally distributed as seedlings are used, it is easy to handle excess or deficiency of seedlings even when a significant change occurs in the design plan.
(7) The planting position and density of the seedling can be freely adjusted in consideration of design and economy.
(8) By mulching between the mound-like plant growth base and the plant growth base, it is possible to prevent dryness and weathering of natural ground.
(9) Natural restoration considering the gene level can be performed at an early stage by using mulching with mixed seed soil or mixed mulching between the mound-like plant growth base and the plant growth base. .
(10) At the gene level by attracting wild birds by growing trees (feeding trees) that bear fruit that attracts wild birds to the mound-like plant growth base and utilizing germination of seeds contained in the feces Natural restoration that takes into account up to can be performed promptly.

以下、図面を参照しながら本発明の実施形態について説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

まず施工に使用する置苗用基盤保持固定具について説明し、その後に自然修復法面工法について説明する。   First, the foundation holding fixture for seedlings used for construction will be described, and then the natural restoration slope method will be described.

(1)置苗用基盤保持固定具
図1,2に本発明に係る置苗用基盤保持固定具10の一例を示す。
置苗用基盤保持固定具10は、法面30に点在して配置され、植物生育基盤を保持する保持帯11と、保持帯11のコーナ部に付設した遮水材12と、保持帯11の両端部間に横架した幅止筋13、及びそのほぼ中央に貫通して取り付けられる固定手段であるアンカーピン14とより構成し、保持帯11を緑化基礎工として植物生育基盤を造成するものである。
置苗用基盤保持固定具10は、少なくとも植物生育基盤40を保持する保持帯11と固定手段を具備すればよい。以下、各部について詳述する。
(1) Infrared seedling holding / holding fixtures FIG. 1 and FIG.
The seedling-holding base holding fixtures 10 are arranged scattered on the slope 30, the holding band 11 that holds the plant growth base, the water shielding material 12 attached to the corner portion of the holding band 11, and the holding band 11. And a anchoring pin 14 which is a fixing means that is attached and penetrated substantially through the center of the horizontal reinforcing bar 13 between both ends of the slab. It is.
The seedling-holding base holding fixture 10 may include at least the holding belt 11 that holds the plant growth base 40 and the fixing means. Hereinafter, each part is explained in full detail.

(2)保持帯
保持帯11は法面30上に自立できるように略直角に成形した面状緑化基礎であり、厚層基材吹付工による植物生育基盤40の保持機能と植物生育基盤40の吹付厚さの管理機能を併有する。
したがって、保持帯11の辺長や高さは植物生育基盤40の造成平面積やその造成厚に応じて適宜設計する。
(2) Retaining band The retaining band 11 is a planar greening foundation formed at a substantially right angle so as to be able to stand on the slope 30. The retaining function of the plant growth base 40 by the thick base material spraying work and the plant growth base 40 It also has a spray thickness management function.
Therefore, the side length and height of the holding band 11 are appropriately designed according to the created flat area of the plant growth base 40 and the created thickness.

保持帯11の素材は本例では金網で形成する場合について説明するが、金網以外に例えば間伐材、ヌキ板、鉄板、プラスチック等多様な素材を使用でき、要は植物生育基盤の保持と厚さ管理を行うことのできる構造を形成できるものであれば、その素材は制限を受けない。
保持帯11に間伐材、ヌキ板等のリサイクル資材を用いると、苗木活着後、これらの間伐材、ヌキ板が腐朽して消失するために環境に優しいものとなる。
また保持帯11に上記と同様の理由で生分解性プラスチック等を用いることもできる。
In this example, the material of the holding band 11 will be described as being formed of a wire mesh. However, in addition to the wire mesh, various materials such as thinned wood, brackish board, iron plate, and plastic can be used. The material is not limited as long as it can form a structure that can be managed.
When recycled materials such as thinned wood and cypress boards are used for the holding belt 11, after thinning the seedlings, these thinned timber and cypress boards will decay and disappear, making it environmentally friendly.
A biodegradable plastic or the like can also be used for the holding band 11 for the same reason as described above.

図示した保持帯11は帯状板の中央を折り曲げて全体形状を略L字形または略V字形等の山形に形成した場合を示す。保持帯11を山形に形成する場合、その折曲角度は、上記した機能を発揮できる角度であればよく、直角にこだわることなく鈍角や鋭角も含むものである。
保持帯11の平面形状は山形以外に、略U字状、或いは略半円状、コ字状であってもよい。
また保持帯11はそのコーナ部を折り畳み可能なヒンジ構造としてもよい。
The illustrated holding band 11 shows a case in which the center of the belt-like plate is bent to form a mountain shape such as a substantially L shape or a substantially V shape. When the holding band 11 is formed in a mountain shape, the bending angle may be an angle that can exhibit the above-described function, and includes an obtuse angle and an acute angle without sticking to a right angle.
The planar shape of the holding band 11 may be a substantially U shape, a substantially semicircular shape, or a U shape in addition to the mountain shape.
The holding band 11 may have a hinge structure that can fold the corner portion.

さらに保持帯11は、一部が解放された形態だけでなく、円筒形や立方形等の閉鎖空間を形成し得る枠体も含むものである。
保持帯11を無端構造の枠体で構成する場合は、幅止筋13を省略し、アンカーピン14に枠体の一辺、又は角部を接することで保持帯11を固定することができる。
Furthermore, the holding band 11 includes not only a partially released form but also a frame that can form a closed space such as a cylindrical shape or a cubic shape.
When the holding band 11 is configured by an endless frame, the width stop bars 13 are omitted, and the holding band 11 can be fixed by contacting one side or corner of the frame to the anchor pin 14.

(3)遮水材
遮水材12は、保持帯11のコーナ部分に雨水を貯留する簡易槽(貯水部)を形成するためのもので、ビニール等の不透水性シート類により構成するものの他に、プラスチックや耐水段ボール等による一体成形物も含むものである。
(3) Water-impervious material The water-impervious material 12 is for forming a simple tank (water storage part) for storing rainwater at the corner portion of the holding band 11, and other than those constituted by impermeable sheets such as vinyl. In addition, an integrally molded product made of plastic or water-resistant cardboard is also included.

遮水材12は、保持帯11と別体の形態のものを一体に取り付けることの他に、保持帯11に予め遮水材12を一体化しておくこともできる。   The water shielding material 12 can be integrated with the holding band 11 in advance, in addition to integrally attaching the holding band 11 and the holding band 11 separately.

遮水材12の貯水部は法面30の上方に開口し、法面下方が貯水壁となる構造を呈する。具体的にはその底面12aの平面形状が保持帯11のコーナ部の底部を遮蔽可能な略三角形を呈していて、この底面12aの隣り合う二辺から延設した起立面12bを垂直に立ち上げて遮水材12のコーナ部の一対の内周面を覆うように形成されている。   The water storage part of the water-impervious material 12 opens above the slope 30 and exhibits a structure in which a water storage wall is formed below the slope. Specifically, the planar shape of the bottom surface 12a has a substantially triangular shape that can shield the bottom of the corner portion of the holding band 11, and the upright surface 12b extending from two adjacent sides of the bottom surface 12a is raised vertically. The water shielding material 12 is formed so as to cover a pair of inner peripheral surfaces of the corner portion.

遮水材12はその底面12aが保持帯11の底部(法面側)を向くように設置される。雨水の貯留を行い植物生育基盤40の保水性の向上を図るものであるから、その大きさは貯水量を考慮して選択する。   The water shielding material 12 is installed so that the bottom surface 12 a faces the bottom (slope side) of the holding band 11. Since the rainwater is stored to improve the water retention of the plant growth base 40, the size is selected in consideration of the amount of stored water.

一般に法面30が急勾配ほど乾燥害を激しく受け、緩勾配になるほど乾燥害を受けにくい。
そこで、法面30が乾燥害を受けにくい緩勾配の場合は貯水量が少なく、反対に乾燥害を受け易い急勾配ほど貯水量が増すように、遮水材12は法面30に接地する底面12aの形成長さが、起立面12bの起立高さに比べて短くなるように形成する場合もある。
In general, the steep slope 30 is more severely damaged by drying, and is less susceptible to drying damage when the slope is gentler.
Therefore, when the slope 30 has a gentle slope that is not susceptible to drying damage, the water storage amount is small, and conversely, the water shielding material 12 is a bottom surface that contacts the slope 30 so that the water storage amount increases as the steep slope easily causes drying damage. In some cases, the length of 12a is formed to be shorter than the standing height of the standing surface 12b.

保持帯11に遮水材12を付設することにより、乾燥の激しい硬質切土法面や急勾配岩盤法面に対する苗木20の活着を良好とすることが可能となる。
また、遮水材12の背面側は、雨水の貯留により低温となり結露するために、根系の進入しやすい環境が形成されて、シートと地山の間に苗木20の根系を発達させることとなる。
尚、遮水材12は必須ではなく、省略する場合もある。
By attaching the water shielding material 12 to the holding belt 11, it is possible to improve the survival of the seedling 20 on the hard cut slope and the steep rock slope slope which are drastically dried.
In addition, since the back side of the water shielding material 12 becomes low temperature and dew condensation due to rainwater storage, an environment in which the root system easily enters is formed, and the root system of the seedling 20 is developed between the sheet and the natural ground. .
The water shielding material 12 is not essential and may be omitted.

(4)幅止筋
保持帯11の両側面間に横架する幅止筋13は、その両端に保持帯11の両側面と係留可能なフック等が形成されていると共に、その中央部にアンカーピン14を取り付けるための係留穴13aが形成されている。
(4) Width retaining bars The width retaining bars 13 that lie between the both side surfaces of the holding band 11 are formed with hooks or the like that can be moored with both side surfaces of the holding band 11 at both ends, and anchors at the center thereof. An anchoring hole 13a for attaching the pin 14 is formed.

この係留穴13aに代えて、アンカーピン14に引っ掛けるためのU字金物の端部を幅止筋13に溶接して固定しておき、アンカーピン14で串刺しにした苗木20ごと地中に差し込んで後、幅止め筋13に取り付けたU字金物をアンカーピンに引っかけるようにしてもよい。   Instead of this mooring hole 13a, the end of the U-shaped hardware to be hooked on the anchor pin 14 is welded and fixed to the width stop bar 13, and the sapling 20 skewed with the anchor pin 14 is inserted into the ground. Thereafter, the U-shaped hardware attached to the width stop bars 13 may be hooked on the anchor pin.

幅止筋13は前述したように保持帯11の口開きを一定に規制すると共に、置苗用基盤保持固定具10全体をアンカーピン14に引っかけて取り付けるためのものである。
幅止筋13の保持帯11への取り付け位置は、図2に示すように幅止筋13の下に苗木20の根鉢21が取り付く高さとする。
幅止筋13とアンカーピン14の協働により、苗木20の固定と置苗用基盤保持固定具10の固定を同時に行うことが可能となる。
(5)アンカーピン
アンカーピン14はあらかじめ電動ドリルなどで削孔した穴に、苗木20の根鉢21を貫通させて挿入して、苗木20と置苗用基盤保持固定具10を保持するものである。
アンカーピン14は図示した棒状のピンの他にU字形のピンであってもよい。
As described above, the width stop bars 13 are used for restricting the opening of the holding band 11 to be constant, and for hooking and attaching the entire seedling holding support 10 to the anchor pins 14.
As shown in FIG. 2, the attachment position of the width stop bar 13 to the holding band 11 is set to a height at which the root pot 21 of the seedling 20 is attached below the width limit bar 13.
By the cooperation of the width stop bars 13 and the anchor pins 14, it is possible to fix the seedlings 20 and the seedling holding base fixture 10 at the same time.
(5) Anchor pin The anchor pin 14 is inserted through a root pot 21 of the seedling 20 through a hole drilled with an electric drill or the like in advance, and holds the seedling 20 and the seedling holding base holding fixture 10. is there.
The anchor pin 14 may be a U-shaped pin in addition to the rod-shaped pin illustrated.

(6)苗木
本発明では、根鉢21をアンカーピン14で固定するため、苗木20としてポット苗木を使用できる。
根鉢を薄い立方体に形成して根鉢の安定性を良くした薄鉢の苗木(薄鉢コンテナ)を使用せずにするため、使用量に変更があってもその対応が容易である。
(6) Seedling In the present invention, since the root pot 21 is fixed by the anchor pin 14, a pot seedling can be used as the seedling 20.
In order to avoid the use of thin sapling seedlings (thin basin containers) in which the root basin is formed into a thin cube to improve the stability of the root basin, it is easy to cope with changes in the amount used.

(7)自然修復法面工法
つぎに置苗用基盤保持固定具10を用いた自然修復法面工法について説明する。
コーナ部が斜面下流側に位置するように、所定の間隔を隔てて千鳥状や升目状となるように複数の置苗用基盤保持固定具10を法面30に配置する。
(7) Natural restoration slope construction method Next, the natural restoration slope construction method using the base-holding fixture 10 for seedlings will be described.
The plurality of seedling-holding base holding fixtures 10 are arranged on the slope 30 so as to form a staggered pattern or a grid pattern at a predetermined interval so that the corner portion is located on the downstream side of the slope.

つぎに各置苗用基盤保持固定具10の幅止筋13と法面30の間に苗木20の根鉢21を配置し、幅止筋13の中央の係留穴13aに差し込んだアンカーピン14を、根鉢21に串刺しするように貫通させて地山に打ち込んで、アンカーピン14で置苗用基盤保持固定具10と苗木20がずれ落ちないように一緒に固定する。
苗木20を固定する際、根鉢21が遮水材12と接しないように置苗用基盤保持固定具10の上部に固定する。
Next, a root pot 21 of the seedling 20 is disposed between the width stop bar 13 and the slope 30 of each planting base holding fixture 10, and the anchor pin 14 inserted into the anchoring hole 13 a at the center of the width stop bar 13 is attached. Then, the root pot 21 is penetrated so as to be skewered and driven into a natural ground, and fixed with the anchor pin 14 so that the base-holding fixture 10 for seedlings and the seedling 20 do not fall down.
When the seedling 20 is fixed, the root pot 21 is fixed to the upper part of the seedling-holding base holding fixture 10 so that the root pot 21 does not contact the water shielding material 12.

苗木20はアンカーピン14で簡単かつ容易に固定できるので、従来のような法面に敷設した金網にポット苗木を結束して固定する困難な作業が不要となるだけでなく、苗木20に栽培の簡単なポット苗木を使用できる。   Since the seedling 20 can be easily and easily fixed by the anchor pin 14, not only the difficult work of binding and fixing the pot seedling to the wire mesh laid on the slope like the conventional one is unnecessary, but also the cultivation of the seedling 20 Simple pot seedlings can be used.

法面30が硬質切土法面や急勾配岩盤法面である場合は、電動ドリル等で予め削孔しておいてからアンカーピン14を挿入する。
アンカーピン14を挿入する孔径を若干幅広に開設するならば、アンカーピン14と孔壁の間に形成される隙間空間を、苗木20の垂直根を地山深部に伸長させるための割れ目として機能させることが可能とって、苗木20の固定効果がさらに高まる。
When the slope 30 is a hard cut slope or a steep slope slope, the anchor pin 14 is inserted after drilling in advance with an electric drill or the like.
If the hole diameter for inserting the anchor pin 14 is set to be slightly wider, the gap space formed between the anchor pin 14 and the hole wall is made to function as a crack for extending the vertical root of the seedling 20 to the deep ground. As a result, the effect of fixing the seedling 20 is further enhanced.

公知の厚層基材吹付工により保持帯11の内部に植物生育基盤40を吹き付けて造成する。植物生育基盤40の造成厚さは、保持帯11の天端を目安に造成する。
法面30が急勾配のときは、苗木20の根鉢21の周囲を十分に締め固める。
法面30が緩勾配のならば、人力による客土工で植物生育基盤40を造成してもよい。
The plant growth base 40 is sprayed inside the holding band 11 by a known thick layer base material spraying method. The formation thickness of the plant growth base 40 is formed using the top end of the holding band 11 as a guide.
When the slope 30 is steep, the circumference of the root pot 21 of the seedling 20 is sufficiently compacted.
If the slope 30 has a gentle slope, the plant growth base 40 may be created by manual earthwork.

植物生育基盤40の造成範囲は、置苗用基盤保持固定具10の平面形状である三角形の範囲だけでもよいが、図4に示すように置苗用基盤保持固定具10の上端を越えて法面上流側まで広げ、上流にかけて次第に薄くなるように造成することが望ましい。   The formation range of the plant growth base 40 may be only a triangular range that is a planar shape of the seedling-holding base holding fixture 10, but as shown in FIG. It is desirable to spread it to the upstream side of the surface and make it gradually thinner toward the upstream side.

厚層基材吹付工に用いる吹付機は、例えば1バッチ当たりの吹付基盤容量が160リットルのバッチ式であり、置苗用基盤保持固定具10一箇所当たり1バッチの植物生育基盤材40を用いてマウンド状に仕上げることが適当である。   The spraying machine used for the thick-layer base material sprayer is, for example, a batch type having a spraying base capacity of 160 liters per batch, and uses one batch of plant growth base material 40 per one place of basement holding fixture 10 for seedlings. It is appropriate to finish it in a mound shape.

マウンド状に造成した植物生育基盤40の崩落力は、置苗用基盤保持固定具10で受け止め、最終的に法面30に固定したアンカーピン14で支持される。   The collapse force of the plant growth base 40 formed in a mound shape is received by the seedling base support fixture 10 and finally supported by the anchor pins 14 fixed to the slope 30.

また置苗用基盤保持固定具10に付設した遮水材12は法面30の上方に開口し、法面下方が起立面12bと底面12aとにより貯水部を形成していることから、この貯水部に雨水を貯留して、植物生育基盤40に良好な保水性を維持できる。
また遮水材12による貯水部は、法面30が急勾配になるほど貯水量が増加する構造になっているため、法面30が乾燥害を受け易い急勾配であっても十分な保水環境を作り出すことができるので、急勾配における乾燥害を緩和することができる。
また植物の根系は水分吸収と共に呼吸も行うものであるため、貯水量が大きすぎると根腐れが発生する心配があるが、根鉢21は遮水材12に直接接しないため、十分な保水環境にありながら根腐れの心配がない。
Further, the water shielding material 12 attached to the seedling-holding base holding fixture 10 is opened above the slope 30 and the water slope is formed by the standing face 12b and the bottom face 12a at the bottom of the slope. Rainwater is stored in the part, and good water retention can be maintained in the plant growth base 40.
In addition, since the water storage portion by the water shielding material 12 has a structure in which the water storage amount increases as the slope 30 becomes steep, a sufficient water retention environment can be provided even if the slope 30 is steep and susceptible to drying damage. Since it can be created, drought damage in steep slopes can be mitigated.
In addition, since the root system of plants also absorbs moisture and breathes, there is a concern that root rot may occur if the amount of stored water is too large. However, the root pot 21 does not directly contact the water-insulating material 12, and therefore a sufficient water retention environment. There is no worry about root rot.

また、遮水材12の背面側は、雨水の貯留により低温となり結露するために、根系の進入しやすい環境が形成されて、シートと地山の間に苗木20の根系を発達させることとなる。   Moreover, since the back side of the water shielding material 12 becomes low temperature and dew condensation due to rainwater storage, an environment in which the root system is easy to enter is formed, and the root system of the seedling 20 is developed between the sheet and the natural ground. .

上記したように遮水材12の背面は結露し根系の侵入しやすい環境となるため、遮水材12の底面12a部分を岩盤部の割れ目に位置させることにより、地山の割れ目に根系の誘導を確実に行うことが可能となる。
そのため、岩盤部の割れ目に根系侵入させることにより、苗木20が成長して樹木となる過程でしっかりと支えられると共に、水分供給を確実に行うことができるようになるから、環境条件の厳しい箇所に対して樹木が定着しやすくなる。
As described above, the back surface of the water shielding material 12 is dewed and the environment easily penetrates the root system. Therefore, by positioning the bottom surface 12a of the water shielding material 12 at the crack in the bedrock, the root system is induced at the crack in the natural ground. Can be reliably performed.
Therefore, by intruding the root system into the crack in the bedrock part, the seedling 20 can be firmly supported in the process of growing and becoming a tree, and the water supply can be surely performed. On the other hand, it becomes easy for trees to settle.

本発明の場合、植物生育基盤40を法面30の全面に均一に造成するのではなく、部分的にマウンド状に仕上げることにより、苗木20の生長に必要な植物生育基盤40を効率的、経済的に造成することが可能となる。   In the case of the present invention, the plant growth base 40, which is necessary for the growth of the seedlings 20, is efficiently and economically produced by partially finishing the plant growth base 40 in a mound shape rather than uniformly forming the plant growth base 40 on the entire slope 30. Can be created.

これにより、マウンド状の植物生育基盤40と植物生育基盤40の間に裸地31が残されることとなる。
この裸地31部分は施工直後は裸地のままであるが、図5,6に示すように時間の経過に伴い地山の風化、吹付基盤材のロス、マウンド状の植物生育基盤40からの肥料養分の溶出によりマウンド状の植物生育基盤40の周囲の裸地が実質的に植物生育基盤40と同様の基盤41としての効果が付与されて行くものであり、植物生育基盤40と同様の基盤41は周辺の在来自然植物の侵入する隙間(ギャップ)、または領域(エリア)として有効に活用することとなる。
As a result, the bare ground 31 is left between the mound-like plant growth base 40 and the plant growth base 40.
Although this bare ground 31 part remains bare immediately after construction, as shown in FIGS. 5 and 6, weathering of the natural ground, loss of spray base material, and mound-like plant growth base 40 from time to time, as shown in FIGS. By the elution of the fertilizer nutrients, the bare ground around the mound-like plant growth base 40 is substantially given the same effect as the base 41 similar to the plant growth base 40. 41 is effectively utilized as a gap (gap) or a region (area) into which the surrounding natural plant invades.

従来は、植物生育基盤40を一様の厚さに造成していたため、養分を豊富に含むことから富栄養環境を好むセイタカアワダチソウ、アメリカセンダングサ等の強害雑草が繁茂する隙間となっていたが、本例のようにマウンド状の植物生育基盤40と植物生育基盤40の間に裸地31を積極的に残して厳しい土壌環境を造成することにより、貧栄養の場を好む周辺自然植生の侵入・定着が促進されるものである。   In the past, the plant growth base 40 was formed to have a uniform thickness, so that it was a gap in which highly harmful weeds such as black-tailed hawks and American Sendangsa that prefer eutrophic environments thrive because they contain abundant nutrients. Like this example, the bare soil 31 is actively left between the mound-like plant growth base 40 and the plant growth base 40 to create a harsh soil environment. Fixation is promoted.

自然植生は、元来養分の少ない土壌条件に耐えて生存する性質を持つものであり、導入する植物の生長を良好とするために土壌改良をし、肥料を併用し養水分に富むように改良を加えた植物生育基盤に対しては種子が飛来しても定着できないものが多い。
その理由は、根系が土壌中に生存する土壌菌に侵されてしまうこと、土壌養分に富む立地で旺盛な生育を示す植物に被圧されてしまうためである。
裸地31は元来養分の少ない土壌条件である場合が多いことから、飛来した種子の定着がよく、多種類の自然植生を実現できる。
Natural vegetation originally has the property of surviving soil conditions that have little nutrients.Soil is improved in order to improve the growth of the plant to be introduced. Many added plant growth bases cannot be established even if seeds fly.
The reason for this is that the root system is invaded by soil bacteria that survive in the soil, and it is overpressured by plants that exhibit vigorous growth in locations rich in soil nutrients.
Since the bare land 31 is often soil conditions with little nutrients, the seeds that have come in are well settled, and many types of natural vegetation can be realized.

裸地31に侵入した植物は、生長した苗木20によって形成される日陰により生育環境が緩和されて行くために次第に大きく成長し、また、多様化した周辺の既設植生環境と同様の植物社会へ復して行くこととなって、生物の多様性と遺伝子レベルにまで配慮した豊かな自然に回復する。
Plants that have entered the bare land 31 grow gradually because the growth environment is relaxed by the shade formed by the grown seedlings 20, and return to a plant society similar to the diversified surrounding existing vegetation environment. As a result, it is restored to a rich nature that takes into account the diversity and genetic level of the organism.

図7にマウンド状に造成した植物生育基盤40と植物生育基盤40の間の裸地にマルチング効果の優れた素材を吹付してマルチング部50を造成した他の実施例を示す。   FIG. 7 shows another embodiment in which a mulching portion 50 is created by spraying a material having an excellent mulching effect on the bare ground between the plant growth base 40 and the plant growth base 40 formed in a mound shape.

法面30が風化に対し抵抗性のある硬質岩盤法面等の場合は、マウンド状の植物生育基盤40を点状に配置することで樹林化が可能となるが、風化の進行の速い軟岩地山等の場合は風化の抑止策が必要となる。   If the slope 30 is a hard rock slope that is resistant to weathering, the mound-like plant growth base 40 can be placed in a dotted pattern to allow for forestation. In the case of mountains, weathering deterrence measures are necessary.

このような場合は苗木20の導入箇所の間の裸地31の領域に対してマルチング部50を造成する。
マルチング部50は、セメント類をバインダーとする(木材生チップ)、モルタルコンクリート吹付工等を挙げることができる。本例の場合、生チップに限定されず、ソイルセメントでも良いし、紙パルプ、ロックウールなど、風化し将来的に植物が生育するものならば何でも良い。
In such a case, the mulching portion 50 is formed in the area of the bare ground 31 between the places where the seedlings 20 are introduced.
Examples of the mulching part 50 include cement mortar (wood raw chips), mortar concrete spraying work, and the like. In the case of this example, it is not limited to raw chips, and may be soil cement, or any material that is weathered and can grow in the future, such as paper pulp and rock wool.

セメント類をバインダーとして木材の生チップ等の植物資材を吹付けてマルチング部50を造成するならば、苗木20類が繁茂したとしても、林床は風化損傷することなく、コケ等の日陰に耐える植物が生育することとなる。
マルチング部50は、有機性の植物資材の分解とバインダーの劣化により、時間の経過と共に土壌化が進行してゆく。
すなわち、マルチング部50は苗木20が伸長するまでの数年間(10年程度)に亘って法面30を被覆して、地山の水分環境を良好なものとしつつ、苗木20の被圧を防ぐもので、その後に風化が徐々に進行して外部から植物が定着していく。
マルチング部50が一定期間に亘って法面30を被覆し、その後に風化させるためには、マルチング部50のバインダーとして貧配合ソイルセメントを用いるとよい。
If the mulching part 50 is created by spraying plant materials such as raw wood chips using cement as a binder, the forest floor will resist weathering damage, such as moss, even if the seedlings 20 grow. Plants will grow.
In the mulching unit 50, soil formation proceeds with time due to decomposition of organic plant materials and deterioration of the binder.
That is, the mulching unit 50 covers the slope 30 for several years (about 10 years) until the seedlings 20 extend, thereby preventing the seedlings 20 from being pressed while improving the moisture environment of the natural ground. After that, the weathering gradually progresses and the plants settle from the outside.
In order for the mulching part 50 to cover the slope 30 for a certain period and then weather it, it is preferable to use poorly mixed soil cement as a binder of the mulching part 50.

また、図8に示すように、置苗用基盤保持固定具10を用いてマウンド状に造成して苗木20を導入た植物生育基盤40に耐陰性のツル植物を導入し、その植物生育基盤40の間をモルタルやコンクリートを吹付けて硬質覆工層60により被覆するならば、高い法面保護効果が得られると共に、硬質覆工層60がツル植物により被覆されて緑化されることとなる。この場合は、鉄筋張り工や金網張工を併用しても良い。   Further, as shown in FIG. 8, a negative vine plant is introduced into a plant growth base 40 in which a seedling 20 is introduced after being formed into a mound using the seedling base holding fixture 10, and the plant growth base 40 If mortar or concrete is sprayed between them and covered with the hard lining layer 60, a high slope protection effect is obtained, and the hard lining layer 60 is covered with vine plants and greened. In this case, a reinforcing bar or a wire netting may be used in combination.

従来、これに類似する工法があったが、植物生育基盤の造成の厚さと質が十分でなく、例えば南向き斜面等の直射日光の照り返しにより硬質覆工層60の地温の上昇が激しい箇所でのツル植物の伸長は困難であった。   Conventionally, there has been a construction method similar to this, but the thickness and quality of the plant growth base are not sufficient, and for example, where the ground temperature of the hard lining layer 60 is drastically increased due to the reflection of direct sunlight on the south facing slope, etc. It was difficult to extend the vine.

本実施例によれば、質的にも量的にも十分な植物生育基盤40を造成でき、かつ、苗木20を十分に繁茂させる日陰を造りながらツル植物を導入することができるために、苗木20の生長とツル植物の良好な生育により硬質覆工層60の緑化による被覆が可能となる。
According to the present embodiment, since the plant growth base 40 that is qualitatively and quantitatively sufficient can be created, and the vine plant can be introduced while creating a shade that allows the seedling 20 to sufficiently grow, seedlings can be introduced. With the growth of 20 and the good growth of the vine plants, the hard lining layer 60 can be covered by greening.

一般に埋土種子混在表土を用いたり、或いは埋土種子混在表土を混合して法面緑化を行うことが知られている。この法面緑化技術は、種子が乾燥しやすい厳しい環境に置かれるために発芽や定着が不良となる場合が多い。   In general, it is known to perform slope planting by using a buried soil mixed topsoil or by mixing a buried soil mixed topsoil. This slope revegetation technique often results in poor germination and colonization because the seeds are placed in a harsh environment where they can dry easily.

これに対して、マウンド状に造成した植物生育基盤40と植物生育基盤40の間の裸地を上記の埋土種子混在表土で覆い、マウンド状に造成した植物生育基盤40に樹木を繁茂させることにより、日陰地を作り出して法面の環境条件が改善されるために、埋土種子混在表土による植生回復を確実、かつ速やかに行うことが可能となる。
On the other hand, the bare land between the plant growth base 40 formed in a mound shape and the plant growth base 40 is covered with the above-mentioned buried seed mixed topsoil, and the plant growth base 40 formed in a mound shape is made to grow trees. Thus, the shaded area is created and the environmental condition of the slope is improved, so that the vegetation recovery by the buried seed mixed topsoil can be surely and promptly performed.

以上は置苗用基盤保持固定具10と苗木20の固定を目的としてアンカーピン14を使用する場合について説明したが、地上に突出する長さを有する長尺ものを使用して、地上に露出させた突出部を、苗木20の転倒防止用の支柱として利用したり、或いはシカ等による枝葉の食害を避けるために設置する筒状の防護装置の保持体として活用するようにしてもよい。   In the above, the case where the anchor pin 14 is used for the purpose of fixing the seedling-holding base support fixture 10 and the seedling 20 has been described. The protruding portion may be used as a support for preventing the seedling 20 from falling, or may be used as a holder for a cylindrical protective device installed to avoid the damage of branches and leaves caused by deer or the like.

長尺鉄筋をアンカーピン14として用いることにより、転倒しないように十分な根入れ長を確保しつつ、地上に伸びる突出部を支柱とすることで、これまで支柱の設置が困難であるために導入が困難とされてきた大型の苗木20の導入が可能となるだけでなく、積雪地での苗木20のクリープによる引き倒しや風衝地での風倒を回避できて、苗木20の活着を容易にすることができる。
By using a long rebar as the anchor pin 14, it is introduced because it has been difficult to install the struts so far by making the projecting part extending to the ground as a strut while ensuring a sufficient penetration length so as not to fall over This makes it possible not only to introduce large-sized seedlings 20 that have been considered difficult, but also to prevent the seedlings 20 from being pulled down by creeping in snowy areas and from being blown up by wind gusts. can do.

実施例1に係る置苗用基盤保持固定具を用いた自然修復工法の概念説明図。The conceptual explanatory drawing of the natural restoration construction method using the base-holding fixing tool for seedlings concerning Example 1. FIG. 置苗用基盤保持固定具を背面側から見た斜視図。The perspective view which looked at the base-holding fixing tool for seedlings from the back side. 置苗用基盤保持固定具と苗木を固定する作業工程説明図。Work process explanatory drawing which fixes the base-holding fixing tool for seedlings, and a seedling. 置苗用基盤保持固定具に植物生育基盤を造成する作業工程説明図。Explanatory drawing of the work process which builds a plant growth base in the base-holding fixture for seedlings. 置苗用基盤保持固定具の周囲に植物生育基盤と同様の基盤が形成された状態における法面の縦断面図。The longitudinal cross-sectional view of the slope in the state in which the base same as a plant growth base was formed around the base-holding fixture for seedlings. 図5に示した苗木と植物生育基盤の斜視図。The perspective view of the seedling shown in FIG. 5 and a plant growth base. 実施例2に係る置苗用基盤保持固定具を用いた自然修復工法の概念説明図。The conceptual explanatory drawing of the natural restoration construction method using the base-holding fixture for seedlings concerning Example 2. FIG. 植物生育基盤と植物生育基盤の間にマルチング部を造成した自然修復工法の概念説明図。The concept explanatory drawing of the natural restoration construction method which created the mulching part between the plant growth base and the plant growth base.

符号の説明Explanation of symbols

10・・・・・・置苗用基盤保持固定具
11・・・・・・保持帯
12・・・・・・遮水材
13・・・・・・幅止筋
14・・・・・・アンカーピン
20・・・・・・苗木
21・・・・・・根鉢
30・・・・・・法面
31・・・・・・裸地
40・・・・・・植物生育基盤
50・・・・・・マルチング部
60・・・・・・硬質覆工層
10... Seedling base holding fixture 11... Holding band 12... Water shielding material 13. Anchor pin 20 ... seedling 21 ... root pot 30 ... slope 31 ... bare ground 40 ... plant growth base 50 ... .... Mulching section 60 ... Hard lining layer

Claims (6)

法面に点在して配置され、植物生育基盤を保持する保持帯と、法面に配置した苗木の根鉢と共に前記保持帯を法面に固定する固定手段とにより構成する置苗用基盤保持固定具を用いて法面に苗木を配置した後、苗木の周囲に植物生育基盤を造成して法面を自然修復する工法であって、
前記置苗用基盤保持固定具を構成する保持帯の内方に、法面に着床させて苗木の根鉢を配置すると共に、固定手段により前記置苗用基盤保持固定具と苗木を共通して法面に固定し、
保持帯の内部に、苗木の根鉢が隠れるまでマウンド状に植物生育基盤を造成し、
マウンド状の植物生育基盤と植物生育基盤の間に裸地を残し、この裸地に周辺自然植生の侵入できる空間を設けたことを特徴とする、
自然修復法面工法。
Basement holding and fixing for seedlings composed of holding bands that are scattered on the slope and hold the plant growth base and fixing means for fixing the holding band to the slope together with the root pots of seedlings placed on the slope After placing seedlings on the slope using tools , the plant growth foundation is built around the seedlings to restore the slope naturally,
Place the seedling root pot on the inside of the holding belt that constitutes the seedling base holding fixture and place the seedling base holding fixture and the seedling in common by fixing means. Fixed to the slope,
Create a plant growth base in the form of a mound until the root pot of the seedling is hidden inside the holding belt,
It is characterized by leaving a bare ground between the mound-like plant growth base and the plant growth base, and providing a space in which the surrounding natural vegetation can enter,
Natural restoration method.
請求項において、マウンド状の植物生育基盤と植物生育基盤の間に残された裸地にマルチング部を造成したことを特徴とする、自然修復法面工法。 The natural restoration method surface construction method according to claim 1, wherein a mulching portion is formed on a bare ground left between the mound-like plant growth base and the plant growth base. 請求項において、マウンド状の植物生育基盤と植物生育基盤の間に残された裸地にマルチング部を造成して裸地の風化を抑制したことを特徴とする、自然修復法面工法。 The natural rehabilitation method surface construction method according to claim 1, wherein a mulching portion is formed on a bare ground left between the mound-like plant growth base and the plant growth base to suppress weathering of the bare ground. 請求項において、マウンド状の植物生育基盤と植物生育基盤の間に残された裸地に施工地近傍で採取された埋土種子を含む表土を植生基盤材と共に吹付けたことを特徴とする、自然修復緑化方法。 According to claim 1, characterized in that the topsoil containing mound-shaped plant growth base and buried seeds taken at construction areas near the remaining bare land during plant growth base was sprayed with vegetation base material , Natural restoration greening method. 請求項1乃至請求項4の何れか1項において、前記保持帯に遮水材を付設して貯水部を形成したことを特徴とする、自然修復緑化方法。  5. The natural restoration greening method according to any one of claims 1 to 4, wherein a water storage part is formed by attaching a water shielding material to the holding band. 請求項1乃至請求項5の何れか1項において、保持帯が生分解性素材で形成されていることを特徴とする、自然修復緑化方法 6. The natural restoration greening method according to any one of claims 1 to 5, wherein the holding band is formed of a biodegradable material .
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JPH08260468A (en) * 1995-03-22 1996-10-08 Mitsui Fudosan Kk Protection method for side slope on bedrock with deep-rooting plant
JPH10159106A (en) * 1996-11-29 1998-06-16 Fudo Constr Co Ltd Construction method for stabilizing slope by planting
JPH11131480A (en) * 1997-11-01 1999-05-18 Raito Kogyo Co Ltd Slope greening method
JP2001218532A (en) * 2000-02-10 2001-08-14 Fujimi Ryokka Kk Nursery stock
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JP2003176537A (en) * 2001-12-11 2003-06-24 Fujimi Ryokka Kk Seeding and planting method and seeding and planting structure
JP2003284434A (en) * 2002-03-28 2003-10-07 Asahi Fiber Glass Co Ltd Mulching material and construction method using the same
JP2004238948A (en) * 2003-02-06 2004-08-26 Amano Kigyo Kk Earth retaining implement for seeding and planting face of slope, and method of seeding and planting face of slope

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