JPH03260221A - Slope-reinforcing vegetating work - Google Patents

Abstract

PURPOSE:To stabilize the cut slope face of the ground as well as raise appearance of it by a method in which a vegetative mat is placed on the sloped face, covered with a netting, and connected integrally by perforated reinforcing tubes horizontally placed on the sloped face. CONSTITUTION:The natural ground is excavated at a height of 1.0 - 2.0 m, and a vegetative mat 6 and geogrids 8A are placed on the slope surface 4. Perforated reinforcing tubes 10 are placed on the mats 6 and the geogrids 8A horizontally or slightly upwards at a pitch of 1.0 - 2.0 m and connected with connecting plates 12 and fastener metals 14. The excavation is further proceeded, the geogrids 8A are connected with following geogrids 8B at connections 16, and these serial operations are repeated to form a cut slope. The perforated reinforcing tubes 10 may be set before the mats 6 are set, the netting material may also be omitted, and a vegetating work may be constructed finally in-stead of the mats 6.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slope reinforcement and greening method, and particularly relates to a method suitable for reinforcing and greening a cut slope that is steeper than the stable slope of a normal slope. [Conventional technology] Slope protection works are, in principle, performed on slopes constructed with stable slopes, with the aim of preventing small-scale slope deformations such as surface deformations.

Broadly speaking, the types of work can be divided into greening work and protection work using structures. Greening involves plant seeds, soil, organic matter,
There is a method of revegetation in which a suitable mixture of fertilizer, soil improvement material, water, etc. is sprayed using a spraying machine. In addition, structural protection works include concrete spraying, concrete block masonry, cast-in-place concrete framing, reinforced earthwork by inserting reinforcing bars, and slope anchoring. In many cases, vegetation works are sufficient for the above targets and purposes.

However, recently, due to constraints due to local conditions, efficient use of land, etc., construction is increasingly being carried out on steeper slopes than stable slopes. In addition to the above-mentioned purpose, the protective structures used in this case are required to withstand a certain degree of earth pressure. Therefore, the greening of the surface of the glue is subject to significant restrictions, making it undesirable from a landscape perspective.

When reinforcing earthworks by inserting reinforcing bars is used to protect structures, concrete spraying is often used to protect the surface of the structure.

The reason for this is that the protection work for the slope surface is expected to have the effect of stabilizing the soil clods on the slope surface that cannot be restrained by the reinforcing material.

[Problem to be solved by the invention]

However, the currently practiced concrete spraying has the following problems.

(1) Since it is difficult to plant vegetation on the concrete during spraying, the concrete surface remains exposed forever, impairing its aesthetic appearance.

(2) It is difficult to treat the water coming out of the ground, causing the surface of the concrete to rise, and cavities to form between the concrete and the ground.6 (3) It is not possible to follow the deformation of the ground, resulting in cracks. .

The purpose of the present invention was to solve the above-mentioned problems, and to provide a slope reinforcement greening method that makes it possible to proactively adopt greening work as a protection work for stabilizing cut slopes. It is.

[Means to solve the problem]

The above purpose is to lay a vegetation mat on a slope created by excavating the ground or on an existing slope.

Thereafter, the slope surface is covered with a net-like material from above the vegetation mat, and then a perforated reinforcement pipe is driven horizontally or slightly upwardly onto the slope surface from above, and the perforated reinforcement pipe and the vegetation mat and This can be achieved by a slope surface reinforcement greening method in which the net-like body is integrally connected and fixed to the slope surface.

Further, the perforated reinforcing pipe can be installed before the vegetation mat, and depending on the case, the mesh can be omitted. Furthermore, instead of the vegetation mat, a vegetation work may be constructed at the end.

[Effect]

According to the above configuration, the net-like body has the effect of stabilizing the soil mass on the slope that cannot be restrained by the reinforcing material, and is able to follow the deformation of the ground to a certain extent, and can transfer locally generated forces to the surrounding area. Since it can be dispersed, it is effective in preventing localized destruction.

In addition to providing a vegetation effect, the vegetation mat also serves as a cushioning material between the ground mass and the net-like body, and also plays the role of filling the gap between the two. After installation, as the plants grow, the two will become closer together and the glue surface will become more stable.

Reinforcement materials using perforated pipes replenish the surface of the slope with groundwater or seepage water from deep within the ground, helping to support vegetation on steep slopes that tend to lack moisture. In addition, draining water from the ground greatly contributes to the stability of the slope and increases the reinforcement effect.

Therefore, the cut slope can be made aesthetically pleasing and stable.

〔Example〕

Hereinafter, some embodiments of the present invention will be described with reference to the drawings.

There are two possible construction methods depending on the condition of the ground and slope slope. One is construction work in relatively unstable ground conditions, in which slope protection work is carried out sequentially as excavation is carried out. The other is construction in a somewhat stable ground condition.
Surface protection work will be carried out at once after all excavation, including the installation of perforated reinforcing pipes, is completed.

The former example will be described as a first embodiment. As shown in FIGS. 1 and 2, the ground mass 2 is first filled with 1.0 to 2. Excavation was carried out to a height of Om. Lay the vegetation Matsutoro and geogrid 8A on the glue surface 4. Perforated reinforcing pipes 10 are cast thereon as reinforcing materials at a pitch of 1.0 to 2.0 m in the horizontal direction, and connected to the surface protection work using connecting plates 12 and fasteners 14. After that, the excavation is further progressed, and the geogrid 8A laid in the previous stage and the geogrid 8B laid later are connected at the connection part 16 so that there is no loosening. By doing this, the earth clod 20 that cannot be restrained by the reinforcing material shown in FIG. 2 is also stabilized. Repeat the above series of operations to form a stable cut slope.

According to this embodiment, it is suitable for constructing a relatively unstable or high cut slope by successively cutting down the slope.

Next, the latter example will be described as a second embodiment with reference to the above drawings. After excavating and placing the reinforcing material 10 on the entire slope in the same manner as in the first embodiment, the vegetation mats and geogrid 8 are laid on the entire surface, and the reinforcing material head is connected to the vegetation mat and the geogrid. It is something. According to this embodiment, a somewhat stable cutting slope can be constructed in one go.

As another example, after the reinforcing material is placed and the geogrid is laid, sprayed vegetation may be applied instead of the vegetation mat.

In these examples, as shown in FIG.
) is 5 degrees to 1 degree in order to function as a drain pipe.
Pour at 0 degrees upward. Also.

The connecting portion between the geogrid 8 and the reinforcing material 10 is provided with projections 1 on the connecting plate 12 in order to avoid concentration of stress as much as possible.
It is effective to provide 8.

In addition, if the slope is relatively gentle, the strength of the network of the vegetation mat alone may be sufficient to stabilize the soil mass on the slope that cannot be restrained by perforated reinforcing pipes, even without using a geogrid. be.

〔Effect of the invention〕

As described above, according to the present invention, greening work can be actively employed as a protection work for stabilizing a cut slope, and a stable cut slope with excellent aesthetic appearance can be constructed.

[Brief explanation of drawings]

1 to 3 illustrate one embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a sectional view, and FIG. 3 is a detailed view. 2... Earth, 4... Glue surface, 8.8A, 8B... Geogrid, 10... Perforated reinforcement pipe, 12... Connecting plate, 14...
...Fixing metal fitting, 16...Connection part, 18...Protrusion. Figure 2 Tail box

Claims (1)

[Claims] 1. A vegetation mat is laid on a slope formed by excavating the ground or an existing slope, and then the slope is covered with a net-like material from above the vegetation mat, and then these A perforated reinforcing pipe is driven horizontally or slightly upwardly onto the slope from above, and the perforated reinforcing pipe, the vegetation mat, and the net-like body are integrally connected and fixed to the slope. Surface reinforcement greening method. 2. A perforated reinforcing pipe is installed horizontally or slightly upwardly on the slope formed by excavating the ground, then a vegetation mat is laid on the slope, and then the slope is placed over the vegetation mat. A slope surface reinforcing greening construction method in which the perforated reinforcing pipe, the vegetation mat, and the net structure are integrally connected and fixed to the slope surface. 3. The perforated reinforcement pipe is installed horizontally or slightly upwardly on the slope formed by excavating the ground, and the slope is covered with a net-like material. A slope surface reinforcement greening construction method, which comprises connecting and fixing the net-like body to the slope surface, and then constructing vegetation on the slope surface. 4. Lay a vegetation mat on the slope formed by excavating the ground, and drive a perforated reinforcement pipe horizontally or slightly upwards from above the vegetation mat onto the slope. A slope surface reinforcement greening construction method in which the vegetation mat is integrally connected and fixed to the slope surface.