JP3341078B2 - Slope revegetation method using thinned wood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a greening slope structure and a greening method using thinned wood.

[0002]

2. Description of the Related Art In a forest, thinning is performed to cut a part of a planted tree during growth for the purpose of growing the tree. On the other hand, as one of conventional slope protection works, there is a method that combines a slope protection work with a structure and a vegetation work. In this case, the structure is installed to prevent the surface layer of the slope from collapsing. Vegetation works will be carried out to prevent slope erosion and to revegetate, which helps to harmonize the surrounding environment. When using a normal frame as a structure, vegetation is performed on the portion surrounded by the vertical beam and the horizontal beam.

[0003]

There are the following problems in the above-mentioned use of thinned wood, the conventional slope structure for greening, and the method of greening the slope. <B> Thinned wood is often used as unused because of its low utility value. Therefore, labor and cost for processing the thinned wood are required. <B> In the case of a law frame made of concrete or the like, the law frame which is an artifact is exposed on the surface until the vegetation grows thick. For this reason, the scenery immediately after construction is bad. <C> A cross beam made of a water-impermeable material is provided. For this reason, the flow of water in the direction of the slope is cut off, and it is difficult to supply water necessary for growing the seedlings. <2> The cross beam is a semi-permanent structure such as concrete. This may hinder the growth of the seedlings.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a good landscape immediately after construction and a slope structure and a slope for revegetation using thinning materials suitable for growing seedlings. It aims to provide a greening method.

[0005]

In order to achieve the above object, the present invention relates to a greening slope structure and a greening method using thinned wood. The boards are placed vertically on the slope with the boards facing each other. Then, a small-diameter log receiving material having an insertable insert portion is inserted from the side of the form plate, and concrete or mortar is sprayed to bury the insert portion to fix the small-diameter log receiving material. A log wall made of a small diameter log is created between the small diameter log receiving members, and a soil outflow prevention sheet is laid on the mountain side of the log wall. It features planting and soil injection in the space surrounded by the soil runoff prevention sheet and the mountain side slope.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the present invention will be described below with reference to the drawings.

<A> Longitudinal Beam The longitudinal beam 2 is a beam that is installed with the slope direction of the slope as the longitudinal direction. For example, there are shotcrete or mortar beams, cast-in-place concrete beams, precast beams, and the like. Shotcrete or mortar beams are composed of wire mesh, rebar and shotcrete or mortar. Cast-in-place concrete beams are created by forming a formwork on the slope and pouring concrete into the formwork. Precast beams are
Beams manufactured in factories and the like before installation on slopes, and are made of plastic, iron, concrete blocks, and the like.

<B> Small-diameter log The small-diameter log 11 is a log material having a diameter of several cm to several tens cm. For example, thinned wood with bark is used. When thinned wood is used, the difference between the diameters at both ends may be large.

<C> Small-diameter log receiving material The small-diameter log receiving material 3 is used for retaining the small-diameter log on the slope. When the small-diameter log receiving member 3 is integrated with the longitudinal beam 2, for example, a bar-shaped member such as a reinforcing bar is attached to an angle steel having a length approximately equal to the height of the beam to form an insertion portion 31 (FIG. 3). When the small-diameter log receiving member 3 is not integrated with the longitudinal beam, a channel steel 32 fixed with an anchor 33 (see FIG. 4), a steel material or a log that can be driven into a slope is used. When a corrosive material such as steel is used for the small-diameter log receiving material 3, the surface can be galvanized or the like to take measures to prevent corrosion.

<2> Log Wall The log wall 10 is made up of one or a plurality of small diameter logs 11 received by the small diameter log receiving material 3. For example, a plurality of small diameter logs 1
1 are stacked to form a log wall 10. The log wall 10 functions as a retaining wall for soil necessary for vegetation.

<E> Soil outflow prevention sheet The soil outflow prevention sheet 12 is a sheet-like sheet that does not allow at least soil to permeate. For example, a waterproof sheet, a permeable woven fabric, a nonwoven fabric, or the like is used. The soil outflow prevention sheet 12,
The log wall 10 is brought into close contact with the wall surface on the mountain side. Log wall 10
Consists of thinned wood. When thinning materials are piled up, there is a considerable gap. Therefore, it is necessary to lay the soil outflow prevention sheet 12 between the soil 5 for vegetation and the log wall 10.

A construction example will be described below with reference to the drawings.

<A> Installation of vertical beams and small-diameter log receiving members A vertical beam 2 is installed on the slope. When using shotcrete or mortar beams, first, the facing wire mesh 2
1. Reinforcing bar 22 and the like are installed in the slope direction. Then, the small-diameter log receiving members 3 having the insertion portions 31 are provided at predetermined intervals in the slope direction. The insertion portion 31 is inserted from the side of the wire net 21 (see FIG. 3). Then, concrete or mortar is sprayed between the facing wire meshes 21 and the wire mesh 21. When the channel steel 32 is used as the small-diameter log receiving member 3, it is installed, for example, at a predetermined interval in the slope direction. The channel steel 32 is fixed to the slope with the anchor 33 (see FIG. 4). If the space between the opposed longitudinal beams 2 is large, a plurality of
2 can also be installed. When a steel material or a log is used as the small-diameter log receiving material 3, a steel material or a log is driven into the slope so as to protrude from the slope surface by a length necessary for forming the log wall 10.

<B> Installation of small-diameter logs and soil outflow sheets The required number of small-diameter logs 11 are piled up while being received by the small-diameter log receiving material 3. When the small-diameter log receiving member 3 is slightly inclined to the valley side, the small-diameter log 11 is supported by the small-diameter log receiving member 3. For this reason, even if small diameter logs are stacked, there is no need for temporary fixing. After stacking small diameter logs 11, small diameter logs 1
A soil outflow prevention sheet 12 is laid so as to contact the small-diameter log 11 on the mountain side of 1.

<C> Planting Planting is carried out in the space surrounded by the soil outflow prevention sheet 12 and its mountain side slope. Place seedlings or mature trees and soil and necessary fertilizer.

[0016]

Embodiment 2 Embodiment 2 will be described with reference to FIG.

<A> Construction method A longitudinal beam 2 is provided as in the first embodiment. A small-diameter log receiving member 3 is provided at one lower end of the opposed longitudinal beam 2 in the same manner as in the method described in the first embodiment. Opposing longitudinal beam 2
One end of the small-diameter log 11 longer than the interval is received by the small-diameter log receiving material 3. At this time, the other end of the small-diameter log 11 is located at a position higher than the position of the small-diameter log receiving material 3 and the other longitudinal beam 2
Contact As a result, the small-diameter log 11 stops between the opposed vertical beams 2 in a direction oblique to the vertical beams. The required number of small-diameter logs 11 are similarly stacked. Thus, the first log wall 10 is constructed. The second-stage log wall 10 is constructed so that the upper end of the first stage receives the lower end of the second stage. Thereafter, log walls of the required number of steps are provided in the same manner.

<B> Other methods In the above method, when the first-stage log wall 10 is obliquely retained between the longitudinal beams 2 without the small-diameter log receiving member 3,
There is no need to use the small diameter log receiving material 3. For example, there is a case where the log wall 10 is stopped by the frictional force between the small diameter log 11 and the vertical beam 2. Conversely, if necessary, the small-diameter log receiving material 3 can also be installed at the upper end of the first stage and the upper end of the second and subsequent stages.

[0019]

Embodiment 3 In Embodiments 1 and 2, a small-diameter log 11 can be installed on a surface of the longitudinal beam 2 opposite to a surface in contact with the slope. As a result, exposure of artificial objects such as concrete is reduced. FIG. 6 shows an embodiment.

[0020]

Embodiment 4 In Embodiments 1 to 3 described above,
The longitudinal beams 2 can be provided with cuts or projections.
As a result, the small-diameter log 11 can be received by the cut or protrusion. In this case, the installation of the small-diameter log receiving material 3 can be omitted.

[0021]

[Effects of the present invention] The slope structure and method for greening using the thinned wood of the present invention are as described above, and the following effects can be obtained. <B> Use a large amount of thinned wood. Therefore, the processing cost of the thinned wood can be reduced, and the thinned wood is used as a resource. As a result, it also contributes to the development of forestry. <B> The area of thinned wood occupying the slope is large. For this reason, the scenery immediately after construction is good, and it is easy to adapt to the surrounding environment. <C> Do not install cross beams for impermeable structures such as concrete. Therefore, the flow of water in the slope direction is not interrupted.
As a result, water is supplied to plants such as seedlings without excess or deficiency, and the plants are suitable for growth. <2> Thinned wood corrodes over a number of years and becomes soil. As a result, the slope and the plant can be integrated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a sectional view of Embodiment 1.

FIG. 3 is an explanatory view of installation of a plug-in type small-diameter log receiving material 3;

FIG. 4 is a perspective view of a small-diameter log receiving material 3 using a channel steel.

FIG. 5 is a perspective view of a second embodiment.

FIG. 6 is a perspective view of a third embodiment.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 17/20 103 E02D 17/20 102 E02D 29/02

Claims (4)

(57) [Claims] 1. A small-diameter log receiving material having a plurality of form plates made of a wire mesh or a perforated plate facing each other in a vertical direction on a slope and having an insertable insert portion. By inserting concrete or mortar onto the form plate and burying the insertion portion, the small-diameter log receiving material is fixed and a longitudinal beam is constructed, and the small-diameter log receiving material is constructed in the same manner as described above. A log wall made of a small diameter log is created between small diameter log receiving members fixed to opposed longitudinal beams, and planting and soil injection are performed in a space surrounded by the log wall and its mountain side slope. , Slope greening method. 2. A vertical beam is installed in a slope direction of a slope, and a small-diameter log longer than a distance between opposed vertical beams is installed in a direction oblique to the vertical beam. A slope revegetation method characterized by laying a soil outflow prevention sheet on the mountain side of a log wall made of logs, and planting and putting soil in the space surrounded by the soil outflow prevention sheet and its mountain side slope. 3. A vertical beam is provided in the direction of the slope of the slope, and one end of a small diameter log is located at the lower end of one of the beams between the opposed vertical beams, and the other end is provided on the other beam. A small-diameter log that is longer than the distance between the beams is installed so as to contact at a position higher than one end, and one or more of the small-diameter logs are used as a first-stage log wall. Above the upper end of the first-stage log wall A second-stage log wall is installed so that the lower end of the second-stage log wall is in contact, and the above steps are repeated to install a plurality of stages of log walls. A slope revegetation method characterized by laying a sheet and planting and putting soil into the space surrounded by the soil runoff prevention sheet and the mountain side slope. 4. The slope face greening method according to any one of claims 1 to 3, a portion of the exposed surface of the longitudinal beam and characterized in that established a small diameter logs, slope greening method.