JPS6282122A - Tree-planting construction on hard rocky face of slope - Google Patents

Abstract

PURPOSE:To improve the efficiency of work, by cultivating plants in a mixed- earth bag, after the bag is fixed on the face of slope from the upper section of a net unit stretched on the face of slope via a retaining frame and an anchor pin, and after a mortar-sprayed layer is formed on the periphery of the mixed- earth bag. CONSTITUTION:Along the face A of a slope, a net unit 1 is stretched, and check nails 11 are driven in. After that, a mixed-earth bag 2 is mounted on the face A of a slope from the upper section of the net unit 1, and the bag 2 is converted with a retaining frame 3 in an embraced manner, and an anchor pin 10 is inserted through the retaining frame 3, and the pin 10 is driven in the hill earth to fix the mixed-earth bag 2 on the face A of the slope. Then, after a profile member 5 of forming a plant-cultivating opening is mounted on the upper surface of the mixed-earth bag 2, a mortar or concrete-sprayed layer 6 is formed on the periphery of the mixed-earth bag 2. Besides, after the profile member 5 is removed, trees and the like are planted at the opening section of the mixed-earth bag positioned at the plant-cultivating opening of the sprayed layer 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a greening method for hard rock slopes, and is suitable for use in waste lands where the soil of the ground is extremely hard and roots of trees and ivy cannot be expected to take root. To form a sprayed layer of mortar or concrete suitable for planting and only around the planting area, thereby saving the labor of spraying work and saving materials for slope spraying.

[Conventional technology]

Generally speaking, among this type of conventional construction methods, the slope greening construction method is proposed as Utility Model Registration No. 1592242 (Utility Model Registration No. 1592242 (Utility Model Publication No.
No. 0061) is known.

The above-mentioned idea is to plant a soil bag holding frame fi+, which is made by bending and forming a rigid net material, in a pocket with an approximately inverted triangular vertical section formed between it and the slope (2) on a slope that can be easily excavated. A soil bag for cultivation (4) is stored, and a lath (7) is placed on the slope except for the top surface of the soil bag (9) and mortar or concrete (8) is placed on the slope.
) is applied by spraying.

[Problem that the invention seeks to solve]

However, in the above-mentioned method, spraying is applied to the entire slope where the ground surface is relatively soft, so it is difficult to apply spraying to areas other than the planting areas on the slope where there is no risk of collapse due to the hard rock geology. Doing so is time consuming and expensive.

In addition, about half of the thickness of the sprayed layer (8) of the wire mesh stretched over the slope is separated from the slope via the spacer (12), so if spraying is not carried out, The effect of installing wire netting is halved. However, if the wire mesh is separated from the slope, it may cause fine rock particles generated from the slope to fall due to wind and rain.

[Means for solving problems]

Therefore, in order to solve the problems of the conventional devices and achieve the object of the invention, the present invention provides a greening method for hard rock slopes in which a net body is closely stretched along the surface of the ground. Place the soil bag on the area of the net where you want to plant, hold it with the holding frame, fix the soil bag together with the holding frame to the slope via anchor pins, and remove the soil. After leaving a planting opening on the top of the bag and spraying mortar or concrete around the soil bag to form a sprayed layer, open the soil bag to match the position of the planting opening on the top of the bag. [Operation] The operation or construction procedure based on the construction method of the present invention will be explained below.

First, in preparation for construction, the slope is surveyed, a development map is created, and the locations for installing the custom earthen structures are determined. The slope will also be cleaned as necessary.

Then, based on the design documents, markings are made on the slope to indicate where the clay will be installed.

Next, the net body is stretched over the entire slope, and the net body is made to conform to the unevenness of the slope using appropriate pegs.

On the other hand, soil bags are prepared by mixing and stirring loam with fertilizer and soil conditioner in a vacant lot near the construction site.
Place the soil bag on the slope from above the net according to the markings, cover the soil bag with the holding frame, and insert the anchor pin through the holding frame and drive it into the ground. Fix it to the slope from above the net body.

Further, a drainage pipe is arranged at the lower part of the holding frame, and its base end is joined to the soil bag.

Next, a mold member for forming a planting hole is placed on the top surface of the soil bag, and then mortar or concrete is sprayed around the soil bag. When the sprayed layer by the sprayer has hardened, the mold member is removed and trees and ivy are planted in the soil bag opening located at the planting opening of the sprayed layer.

〔Example〕

The present invention will be explained in detail below.

1 was installed closely along slope A of hard rock geology7)
The material may be any wire mesh, synthetic resin mesh, or the like. In addition, when constructing the net body with wire mesh, thin linear bodies and meshes of appropriate size may be used to make it easier to fit on slopes.
Specifically, the mesh size is set to be a tortoiseshell with a diameter of 1m and a side of about 26 cranes. Further, when the net body is made of synthetic resin, the size of the mesh can be arbitrary as long as it is set to a thickness that does not easily wear off when stretched.

It is important to drive pegs 11 into areas where the net body separates from the slope due to severe unevenness of rocks, etc., so that it conforms to the slope.

2 is the part of the net body that you want to plant! 3! A bag made of relatively thin sandbags 21 filled with soil 20 and molded with a sediment prevention material made of chemical products or vegetable crude fibers with a thickness of 10 or more. Store it in. The storage capacity of the soil bag is 3.0 to 4. On? Set to . In addition, the soil 20 shall be a high-quality black loam for landscaping that does not contain impurities, and if high-quality loam cannot be obtained, the soil shall be carefully improved before filling.

In this case, the opening 22 of the soil bag shall be located at the top.

The number of soil bags is set at a rate of one in every 2.5 to 3.0, and therefore around 40 bags per 1 oorrr.

3 is a holding frame for holding the soil bag 2 and fixing it on the slope A from above the net body I, and is an abbreviated vertical cross section made of expanded metal with wing pieces 31, 31 bent on both the left and right sides. It is molded into a triangular pocket type, and an anchor pin 10 is attached to the wing piece.
Insert it into the ground, and hook part 10. It is hooked onto the wing piece 31 and fixed to the slope A together with the extra earth body 2.

Reference numeral 4 indicates a drainage pipe which is hooked to the lower part of the holding frame 3 and whose base end 41 abuts against the soil bag 2.

Reference numeral 5 denotes a circular or square mold member for forming a planting opening placed on the top surface of the soil bag, the height h of which is higher than the set thickness of the sprayed layer, and the mold member is formed into a truncated inverted conical shape.

6 is a sprayed layer of mortar or concrete that is hardened by spraying only around the soil bag 2 and the holding frame 3;
The thickness t is set to around 10n. 7 is sprayed layer 6
Shrub trees or vines are shown to be planted in the opening 22 of the soil bag 2 through the planting opening 8 provided in the soil bag 2. As the shrub, Japanese clover is suitable. It is desirable to do so.

〔Effect of the invention〕

Since the present invention has the above configuration, the soil bag can be fixed to the slope from above the net body via the holding frame/anchor bin.

Therefore, the installation is quick and there is no need to cut open the net body to pass the soil bag through, so there is an effect of saving time and effort.

In addition, the mortar or concrete layer for fixing the soil bag and holding frame is applied only to the area around the soil bag and holding frame, and is not sprayed onto other slopes, making the work more efficient. However, mortar or concrete spraying can save a lot of material, so costs can be reduced.

Furthermore, by covering the slope other than the planting area with a net, fallen leaves accumulate on the surface of the net, which eventually turns into humus, and seeds scattered from outside settle on the humus layer and grow. The greening becomes deeper as the years go by. In addition, ivy plants planted through the planting opening of the spray layer and the opening at the top of the soil cover can reliably spread along the net, and can reliably flourish.

Furthermore, the net stretched on the slope other than the planting area is made of its own material and is made to fit into the ground through the use of pegs, etc., so that it comes into close contact with the slope. In the same way, it is possible to reliably prevent the collapse of rock powder and falling rocks, and it is a novel and beneficial greening method specifically for this type of hard rock slope.

[Brief explanation of drawings]

The drawings show an example of the greening structure on a hard rock slope according to the construction method of the present invention, in which Fig. 1 is a vertical cross-sectional view of the slope, Fig. 2 is a vertical cross-sectional view of a part of Fig. 1 enlarged, and Fig. 3 is a vertical cross-sectional view of the slope. 4 is a perspective view of the soil bag and the holding frame, and FIG. 4 is a longitudinal sectional view of the soil installation device according to the conventional construction method. 1...Net body. 2... A bag of dirt. 3...Holding frame. 4... Water drain pipe. 5...Mold member for forming planting opening, '6...
・Mortar or concrete sprayed layer. 7...Shrubs, trees, and ivy. Patent applicant: Takahashi Tokushu Civil Engineering Co., Ltd. Agent: Masao Isono Figure 4 Figure 3 Figure 2 Δ

Claims (1)

[Claims] A net body is stretched closely along the surface of the ground, a soil bag is placed on the net body at the site where planting is to be done, and this is held by a holding frame, and the soil bag is placed in the area through anchor pins. Fix the soil bag together with the holding frame on the slope, leave an opening for planting on the top of the soil bag, and spray mortar or concrete around the soil bag to form a sprayed layer. A method for greening a hard rock slope, characterized by planting trees in a soil bag through an opening in the soil bag that matches the position of the planting opening on the top surface of the soil bag.