JPH1129935A - Method for protecting face of slope and wire netting for use therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for protecting a face of slope, that can be executed on any faces of slope without being affected by the nature of rocks and configuration of the face of slope, enables trees to be planted for a long period as a layer of fertile soil can be made thick, stabilizes the face of slope without causing cracking or peeling, and enables construction work to be performed at low cost. SOLUTION: Iron wires which are curved as if corrugated are aligned in their longitudinal direction, and the projecting parts of the iron wires on one of adjacent sides are made to cross the recessed parts of the iron wires on the other side to form wire netting 2 taking the form of successive triangular pyramids. Vertical beam reinforcement 3 and horizontal beam reinforcement 4 are placed on the apexes of the triangular pyramid shapes of the wire netting 2 and are tied together, and the wire netting 2 is placed on a face H of slope and is fixed in place by driving anchors 5 at the intersections of the vertical beam reinforcement 3 and the horizontal beam reinforcement 4. Next, a mixture of earth and sand with high-degree formation is sprayed by a wet spray gun, lath reinforcement 6 is placed, and a thick layer of fertile soil is sprayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope protection method, and more particularly, to a slope protection method capable of vegetation of trees.

[0002]

2. Description of the Related Art As a slope protection method, a method of covering the entire surface of the slope with concrete has been adopted.
From the viewpoint of aesthetics, not a preferable construction method, but a slope protection method capable of vegetation is preferable.

FIGS. 13 to 15 show a typical example of a conventional vegetation slope protection method, in which a set of four vertical beam reinforcing bars 21 and 4 is provided.
This set of horizontal beam reinforcing bars 22 is arranged in a square shape, and each vertical beam reinforcing bar 2
1 and the horizontal beam reinforcing bar 22 are tied together by the reinforcing reinforcing bar 23, and a formwork 24 made of expanded metal or crimped wire mesh is arranged on both sides of each of the vertical beam reinforcing bar 21 and the horizontal beam reinforcing bar 22 by the reinforcing bar supporting arm 25, and auxiliary anchors are provided at appropriate places. 26, and the main anchor 27 is driven into the intersection and fixed to the slope H.

[0004] A mortar or concrete C obtained by adding water to the aggregate and the cement and kneading them is poured into such a formwork,
A concrete cast-in-place concrete frame 20 is constructed.

[0005] A concrete frame 20 is packed with a sandbag 28 filled with earth and sand. As shown in FIG.
In order to support the weight of the superstructure, a foundation concrete structure 29 is constructed at the bottom of the butt.

[0006]

SUMMARY OF THE INVENTION
There are the following problems.

The cost of the formwork accounts for 40% of the total construction cost.

[0008] There is no follow-up property to the settlement of the ground, and it is impossible to perform the construction on a slope having irregularities. Construction requires a basic concrete structure, which increases construction time and cost. Limited to slopes that are easy to shape.

On a level ground, sandbags are stuffed with earth and sand, and one bag is transported to the slope with a sandbag packed to about 30K, which is then packed inside a concrete formwork structure. Cost.

[0010] Mudstone or tuff, sandy soil, gravel,
Soil that is susceptible to surface erosion, such as sand and rock mass mixed sandy soil, cannot be sloped with a formwork.

[0011] The seepage water on the slope and the cracks in the frame cause collapse.

[0012] Revegetation is limited to single annual grass (grass) only, and additionally requires annual maintenance.

[0013] Formwork is difficult due to the rocky nature of the slope and vegetation becomes impossible due to lack of nutrition of the base material.

The planting area is lost by 30% due to the concrete formwork structure.

Since the cement bonding material is used in the thick-substrate spraying method, the organic-substrate spraying method forms a thin water-impermeable membrane between the sloped surface and the organic base material, and does not become acidic.

Since the load on the slope of the cast-in-place concrete frame is large, the ground anchor must be thick and long. In the case of a steep slope, the anchor must be thicker, longer and kneaded into the ground.

Since the concrete frame is not in close contact with the slope (edge cutting state), if there is a gap, the flowing water will scour the underside of the frame. For this reason, it is necessary to pack the clayey soil into a sandbag and to trim the clay.

If the ground has irregularities, the formwork will be overwhelmed and it will be difficult to assemble the rebar, and the formwork will also be bent artificially, making it difficult to spray cast-in-place concrete and scattering a large amount of concrete material. Would.

When there is a lot of spring in the ground, the mortar spraying method cannot obtain a reliable hardening, causing cracks, peeling and spalling, resulting in an unstable slope such as increasing pore water pressure.

[0020]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional slope protection work, and can be implemented on any slope without being affected by the rock quality and shape of the slope. It is intended to provide a slope protection method that can stabilize without causing cracks, peeling and spalling, and that can be constructed at low cost. Things.

[0021]

According to the present invention, an iron wire bent in a wave shape is juxtaposed in the longitudinal direction, and the peaks of the iron wire on one side adjacent to the iron wire and the other side are arranged. To form a continuous triangular pyramid-shaped wire mesh by intersecting the valleys of the iron wires, and arranging the longitudinal beam reinforcing bar and the horizontal beam reinforcing bar on the top of the triangular pyramid shape of the wire mesh and binding them, and the wire mesh on the slope It is arranged and fixed by driving an anchor at the intersection of the vertical beam reinforcing bar and the horizontal beam reinforcing bar. Then, a mixture of earth and sand and a high-grade chemical spraying is sprayed by a wet spraying machine, and then a lath wire mesh is arranged and a thick layer of soil is sprayed.

Further, in the practice of the present invention, the transverse beam small reinforcing bars are arranged between the transverse beam reinforcing bars to give more strength. Here, when the wire mesh is arranged on the slope and the anchor is driven and fixed, it is preferable that the bottom of the wire mesh having a triangular pyramid shape is fixed by driving a small anchor.

Further, a small mesh wire mesh is arranged on the horizontal step portion of the wire mesh having a triangular pyramid shape to prevent the flow of sprayed earth and sand, reinforce the wire mesh, and stabilize the earth and sand lamination.

The wire mesh having the triangular pyramid shape is well adapted to the slope soil and does not apply an unreasonable load to the slope, and the thickness of the customer soil layer can be increased by the triangular pyramid-shaped structure of the wire mesh. Vegetation is possible, resulting in a stable vegetation slope without cracking, peeling or spalling.

Since the root system of the plant is entangled with the wire mesh, and the reinforcing bar, earth and sand, and the root system of the wire mesh are integrated, the stability of the thick soil is extremely high. In addition, the vegetation slope adheres to the ground to complete the integration.

The back seepage water receives rainwater supply from the back seepage water through the earth and sand layer on the entire slope, and a necessary amount of seepage water for vegetation can be supplied, so that the growth of trees (trees) becomes possible. . Since the nutrient soil layer for water permeability, air permeability, and vegetation on the entire slope is thick, the entire slope becomes a structure and the soil is not washed away.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 6, corrugated iron wires 1A, 1B, 1C,... Are juxtaposed in the longitudinal direction, and as shown in FIG. Wire mesh 2 having a continuous triangular pyramid shape by crossing peaks X of the iron wire 1B on the side and valleys Y of the iron wire 1C on the other side.
To form

A vertical beam reinforcing bar 3 and a horizontal beam reinforcing bar 4 are arranged and bound on the triangular pyramid-shaped top T of the wire netting 2, and the wire netting 2 is arranged on a slope H to form the vertical beam reinforcing bar 3 and the horizontal beam reinforcing bar 4. The anchor 5 is driven and fixed at the intersection. Next, the mixture of earth and sand and the advanced chemical conversion is sprayed with a wet spraying machine. In addition, small anchor 5
It is preferable to fix the lower part of the wire mesh 2 with a.

Next, as shown in FIG. 5, the lath wire mesh 6 is bound and arranged by the binding wire 7, and the thick soil is sprayed.

In FIG. 2, A indicates spraying of earth and sand and thick soil, B indicates vegetation spraying, and the vegetation spraying thickness B is about 7 cm.

[0032] A high slope with a thick layer of nutrient soil is completed and tree vegetation becomes possible.

The iron wire 1 constituting the wire net 2 having a triangular pyramid shape is a zinc-plated iron wire having a diameter of 5 m / m to 20 m / m, and the mesh M is 10 cm to 70 cm. As the reinforcing steel bars (vertical beam reinforcing bars 3 and horizontal beam reinforcing bars 4), galvanized steel bars having a diameter of 13 m / m to 25 m / m are used.

FIG. 7 shows the adjacent iron wires 1A, 1B, 1C
.. Show another example of the intersections at the peaks X and the valleys Y. The iron wires 1A, 1B, 1C,... Are twisted and connected at the peaks X and the valleys Y.

FIGS. 8 to 10 show a second embodiment of the present invention. In this embodiment, a transverse beam small reinforcing bar 4a is arranged between transverse beam reinforcing bars 4... As the slope H of the slope H becomes steeper, the transverse beam small bone reinforcing bars 4a are arranged densely so as to have strength. And the top of the wire mesh 2 and the longitudinal beam reinforcing bar 3
It is preferable to bind them in advance.

FIGS. 11 and 12 show a third embodiment of the present invention. In this embodiment, a small mesh wire mesh 8 such as an expanded metal or a crimp wire mesh is provided on a horizontal step 2a of a wire mesh 2 having a triangular pyramid shape. Are bound 9.

The small mesh wire mesh 8 can prevent the flow of the sprayed earth and sand, reinforce the wire mesh, stabilize the earth and sand layer, and promote the growth of the plant due to the root system of the plant being entangled with the wire mesh.

[0038]

The present invention has the following excellent effects.

The material cost can be reduced to about 1/3 of that of the conventional method because only the wire mesh and the reinforcing bar which can be easily blended with the sloped soil can be bent.

In the conventional method, a basic concrete structure is required at a lower portion to support a concrete formwork. However, since a flexible wire mesh is disposed on a slope, a large cost is required for the basic concrete structure. Becomes unnecessary, and the cost can be significantly reduced as compared with the conventional method.

Since the material and structure of the wire mesh are flexible,
It is closely integrated with the ground and has a great effect of preventing scouring of the soil and preventing the flow of earth and sand.

[0042] Even if the geological slope is unsuitable for vegetation, earth and sand can be secured on the wire net standing in a triangular pyramid shape, so that the vegetation base material layer can be sprayed thickly, and trees can be vegetated for long-term greening.

Fertilized soil (substrate made by grinding and fermenting wood chips, peat moss, perlite black clay, chicken manure, nitrogen, phosphoric acid,
Vegetation can be vegetated because the reinforcing steel and wire mesh structure, which is easy to adjust to the nutrient soil and soil of the mixture of potassium, etc.) is used as a stabilizer on the slope.

Since no concrete form structure is used, advanced chemical conversion mixed with water-permeable and air-permeable earth and sand sufficiently contributes to planting, thereby contributing to greening of all slopes.

The back seepage water can be drained from the whole surface through the sediment layer on all the slopes, rainwater can permeate the required amount to the vegetation, and the supply of soil and moisture and oxygen is performed all the time.
It has good ventilation and promotes vegetation nutrition.

The vegetation area which is 30% or more is larger than the vegetation area hindered by the concrete formwork of the conventional method.

Since the soil is not divided by the formwork as in the conventional construction method, the growth of vegetation is good, and the wire mesh, rebar and plant root system are integrated, the stability of the entire slope is high, and the entire vegetation is possible. Becomes Therefore, there is no crack, peeling or peeling of the slope.

Since the soil layer can be made thicker, it is possible to cope with erosion of the soil due to heavy rain and frost heaving of the soil in winter.

[0049] An anchor capable of coping with a ground stress of three times the stress of the anchor force according to the conventional construction method is employed, without constructing a large load such as a concrete form having a large load on the slope. Since no concrete formwork frame has been constructed, even if there is unevenness in the ground, no excessive force will be applied and trouble such as construction will not occur, and the reinforcing bar and wire mesh will be integrated with the ground entirely. Therefore, it is possible to cope with any deformation of the ground, and therefore, the effect of protecting the slope is high.

Mudstone and tuff, sandy soil, gravel,
Construction is possible even on soils that are susceptible to surface erosion, such as sandy soil mixed with rock mass.

It is not necessary to pack sandbags in sandbags, and to carry sandbags of this weight one bag at a time on the slope (slope), and to use a wet spraying machine that does not perform water kneading. This is four times faster than conventional methods.

[Brief description of the drawings]

FIG. 1 is a plan view of a slope protection work according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the same.

FIG. 3 is a plan view showing a binding state of iron wires.

FIG. 4 is a front view showing a relationship between a wire mesh, a vertical beam reinforcing bar, a horizontal beam reinforcing bar, and an anchor.

FIG. 5 is a front view showing the relationship between a wire mesh and a vertical beam reinforcing bar, a horizontal beam reinforcing bar, a lath wire mesh, and an anchor.

FIG. 6 is a perspective view of a slope protection work according to the embodiment of the present invention.

FIG. 7 is a plan view showing another example of the binding state of the iron wires.

FIG. 8 is a plan view of a slope protection device according to a second embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of the same.

FIG. 10 is a front view showing a relationship between a wire mesh and a vertical beam reinforcing bar, a horizontal beam reinforcing bar, a lath wire mesh, and an anchor.

FIG. 11 is a vertical view of a slope protection work according to a third embodiment of the present invention.

FIG. 12 is a plan view of the same.

FIG. 13 is a plan view of a conventional slope protection work.

FIG. 14 is a longitudinal sectional view of the same.

FIG. 15 is a longitudinal sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Iron wire 2 ... Wire mesh 3 ... Vertical beam reinforcing bar 4 ... Horizontal beam reinforcing bar 5 ... Anchor 6 ... Lath wire mesh 7 ... Binding wire 8 ... Wire mesh 9 ... Binding line

Claims (4)

[Claims] An iron wire bent in a wave shape is arranged in a line in the longitudinal direction, and the peaks of the iron wire on one side adjacent to the iron wire and the valleys of the iron wire on the other side are intersected to be continuous. A wire mesh with a triangular pyramid shape is formed, and a vertical beam reinforcing bar and a horizontal beam reinforcing bar are arranged at the top of the wire triangular pyramid shape and bound together, and the wire mesh is arranged on the slope to form a vertical beam reinforcing bar and a horizontal beam reinforcing bar. A slope protection method characterized in that an anchor is driven in at an intersection and fixed, and then a mixture of earth and sand and a high-grade chemical is sprayed with a wet spraying machine, and then a lath wire mesh is arranged and a thick layer of soil is sprayed. 2. The slope protection method according to claim 1, wherein a horizontal beam small reinforcing bar is arranged between the horizontal beam reinforcing bars. 3. The slope protection method according to claim 1, wherein a wire mesh having a small mesh is arranged on a horizontal step portion of the wire mesh having a triangular pyramid shape. 4. An iron wire bent in a wave shape is arranged in a line in a length direction,
A wire mesh used in a slope protection method, characterized in that a peak of the iron wire on one side adjacent to the iron wire and a valley of the iron wire on the other side intersect to form a triangular pyramid shape.