JP3516091B2 - Natural slope maintenance method and equipment used for it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a natural slope conservation method and a device used therefor, which prevents the natural slope from collapsing while preserving growing plants without cutting or cutting the topsoil. Is.

[0002]

2. Description of the Related Art In order to prevent the natural slope from collapsing and stabilize it, conventionally, for example, the following methods have been adopted. Cut the slope to loosen the slope. Build a retaining wall that is safe in terms of weight and strength, such as a concrete retaining wall. The cast-in-place method frame material and the precast method method frame material are fixed to the slope with an anchor, and mortar is sprayed into the frame to prevent the topsoil in the frame from collapsing.

[0003]

However, in all of these conventional methods, the vegetation on the natural slope is removed in order to cut the slope or adjust the slope by cutting the topsoil.
Plant ecosystems are often destroyed.

An object of the present invention is to provide a natural slope conservation method for stabilizing a natural slope in a state where the plant ecosystem is preserved without adjusting the cut soil or the topsoil and preventing the outflow of the topsoil. To do. Moreover, the objective of this invention is providing the apparatus used for implementing the said maintenance construction method.

[0005]

In order to achieve the above-mentioned object, the method of the present invention has the following constitution. That is, the reinforcing bars are inserted on the natural slope at appropriate intervals. In the slope area around each reinforcing bar, from the support mesh plate and the support mesh plate
Also has a small area, and is used for pressing down that is superimposed on the pressure-bearing mesh plate.
And the plate are laid so that the reinforcing bar head projects. After that, from the upper side of the pressing plate,
Elastically press the plate. Then, the slope is provided with continuous or discontinuous fences at intervals in the lengthwise direction and in the widthwise direction of the slope.

The fence is constructed, for example, so as to extend continuously in the width direction of the slope across the pressure bearing net plate. Alternatively, a first slope area (four pressure-supporting mesh plates, top, bottom, left and right) between two pressure-supporting mesh plates positioned vertically in the length direction of the slope and between the two pressure-supporting mesh plates positioned left and right in the slope width direction. (The central area of the area surrounded by) and the second slope area between the two support mesh plates located above and below in the length direction of the slope, or the third slope area where each support mesh plate is laid. , Work so that it extends discontinuously in the width direction of the slope.

Further, the device of the present invention is such that the reinforcing bar to be inserted into the natural slope, the mesh plate means for supporting pressure laid in the slope area around this reinforcing bar, and the area smaller than that of the mesh plate for supporting.
Polymerization on the mesh plate for bearing so that the head portion of the reinforcing bar projects
Using the presser plate and the reinforcing bar head
Comprising a spring means for pressing elastically the plate and bearing capacity for network board for the pressing from above, and a fence section erected on the slope. As the mesh plate means for supporting pressure, a wire mesh or expanded metal having a mesh or holes that does not hinder the growth of plants is used. As the spring means, a compression coil spring or a leaf spring is used which is fixed to the head portion of the reinforcing bar and elastically presses the support net plate material through the pressing plate.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the illustrated embodiments. FIG. 1 is a partial sectional view of a slope to which a construction method according to an embodiment of the present invention is applied. In this construction method, first, holes are drilled at substantially equal intervals in the vertical and horizontal directions while avoiding trees on the slope, using a boring machine. The space between the drilled holes may be, for example, 1 to 2 m. Rebar 1 having a male screw on the head 1a in this hole
(Diameter about 25 mm, length 4 m) is inserted, and grout material 2 such as cement milk is injected around the reinforcing bar 1. By inserting the reinforcing bar 1, a pseudo retaining wall is formed on the slope and is stabilized.

Next, the support net plate 3 is laid so as to cover a slope area in a required range around each reinforcing bar 1. The pressure-bearing mesh plate 3 is intended to prevent localized hollowing out of the soil between the reinforcing bars, and has a mesh or holes on the plate surface that does not hinder the growth of plants. For example, it consists of a diamond wire mesh or expanded metal. Pressure support mesh plate 3
Is smaller than the interval between the adjacent reinforcing bars 1 and is formed in an appropriate size assuming the dominant area of the reinforcing bars 1.

A head portion 1a of the reinforcing bar 1 with a screw projects from the plate surface of the laid supporting net plate 3. The pressing plate 4 and the compression coil spring 5 are fitted into the head portion 1a, and the nut is tightened from above. The coil spring 5 elastically presses the pressure-bearing net plate 3 through the pressing plate 4,
Compress the topsoil. A protective cap 6 is put on the exposed head portion of the reinforcing bar including the coil spring 5 (see FIG. 3).

FIG. 2 is an explanatory view of FIG. 1 seen from the upper side. The reinforcing bars 1 are inserted into the slope at intervals of about 2 m, and the reinforcing bars 1 are laid so as to pass through the head of the reinforcing bars 1. The layout of expanded metal 3 (50 cm in length and width) as a mesh plate is shown. When a wire mesh of 150 cm in length and width is used for the pressure support mesh plate 3, a diameter of 25 mm is provided at its four corners, though not shown.
A fixing pin having a length of mm and a length of about 1 m is driven and fixed to the ground. Further, a wire rope may be connected to the edge of the wire net by a wire fixing coil.

A steel rod may be connected to the head of the reinforcing bar 1 through a coupler, and a coil spring having a lower diameter of 50 cm may be covered, and the head of the connecting steel rod may be nut-tightened. Further, a plate of about 10 cm in length and width may be fitted to the head of the fixing pin and connected by a nut.

Next, a fence is applied to the slope. The fencer may be a net fencer, a log fencer, or a rail fencer. FIG. 4 shows a fence 7 according to one example. This fence 7 has a height of 40, for example.
cm, and a fence main body 7a made of expanded metal having a width of 150 cm, and fixing pins 8 attached to the widthwise center and both sides thereof. The fixing pin 8 is driven into the ground at a depth of about 1 m.

The fence 7 is installed continuously or discontinuously in the width direction of the slope. In the case of discontinuity, at least in the middle of the pressure-bearing mesh plates arranged above and below the slope and in the middle of the pressure-bearing mesh plates adjacent to the left and right, the first slope area (4
The center of the slope area surrounded by two bearing nets. It is installed at the position 9 in FIG. 2). The fence 7 is installed in the slope area 9 where the slope is the most unstable because it functions not only to prevent the outflow of the topsoil but also to prevent the collapse due to the dropout of the topsoil. In the example of FIG. 2, the fence 7 provided on the upper stage of the fence in the above slope area is displaced in the width direction of the slope, and is located at the middle of the upper and lower support nets.
It is located on slope area 10. Therefore, the discontinuous fences 7 in FIG. 2 are arranged in a staggered manner between the upper and lower bearing net plates 3, 3. As a result, outflow of topsoil can be effectively prevented over the width direction of the slope. Instead of the second slope area, the fence may be arranged in an area that passes through the pressure bearing net plate.

In addition, when the fence is continuous in the width direction of the slope, it may be installed at a position crossing over the support net plate 3.
In this case, a coupler 11 is connected to the head of the reinforcing bar 1 and a steel rod 12 for a fence support is attached to this coupler 11. A fixing pin 13 that is driven into the ground and the steel rod 12 for the fence post are attached to the fence body 17a. FIG. 5 is an explanatory view showing a part of such a fence. The fence 17 of this structure is also applied when discontinuous fences are installed on the pressure-bearing net plate.

A coil spring is used in the above-described embodiment for elastically pressing the pressure-supporting net plate, but the present invention is not limited to this, and a leaf spring or the like may be used. In the case of leaf springs, although not shown, a plurality of leaf springs are intersected in an X shape or a cross shape on the upper surface of the support mesh plate, and the end portions of each leaf spring are fixed to the ground by pins, while the intersecting central portion After being inserted into the head portion of the reinforcing bar, the nut is tightened to hold down the pressure-supporting net plate by utilizing the bending elasticity. Of course, other elastic pressing means can be adopted. If necessary, wire mesh may be laid in the slope area between the pressure-supporting mesh plates, and these wire meshes may be connected by a coil. It will prevent the entire slope from collapsing.

[0017]

As described above, according to the present invention, since the construction is carried out by using the reinforcing reinforcing bars, the nets for supporting the pressure and the fence, the slope is prevented from collapsing while the plant ecosystem growing on the natural slope is preserved. And stabilization can be aimed at.

Further, according to the present invention, since the pressure-bearing net plate is elastically pressed, it is possible to prevent the surface layer from being lifted by the flexible surface pressure, and it is possible to effectively prevent the topsoil from collapsing together with the reinforcing bar. . The slopes can be made more stable by applying fences to the places where the support nets are not laid.

Further, according to the present invention, since the fence is used in combination, even if the topsoil slides down due to heavy rain or melting of snow, each shelf receives it and prevents the entire slope from collapsing.

Further, according to the present invention, the slope is stepwise due to the accumulation of the top soil inside the shelf, and the slope becomes gentle, whereby the stability of the slope can be increased. Deciduous leaves and the like are more likely to accumulate, so that the growth of plants can be promoted by increasing the amount of humus soil.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a slope to which a construction method according to an embodiment of the present invention is applied.

FIG. 2 is a schematic view of the slope of FIG. 1 as seen from above, showing the positional relationship between the reinforcing bars, the pressure-bearing mesh plates, and the fences.

FIG. 3 is an enlarged cross-sectional view of a head portion of a reinforcing bar.

FIG. 4 is an explanatory view showing a fence used in the embodiment of FIG.

FIG. 5 is an explanatory view showing another example of the fence.

[Explanation of symbols]

1 Reinforcing Reinforcing Bar 1a Head of Reinforcing Reinforcing Bar 3 Supporting Net Plate 4 Holding Plate 5 Coil Spring 6 Protective Cap 7 Bar 7a Bar Main Body 9 Slope Area (First Slope Area) 10 Slope Area (Second Slope Area)

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 17/20 106 E02D 17/20 103

Claims (5)

(57) [Claims] Claim: What is claimed is: 1. Reinforcing bars are inserted into natural slopes at appropriate intervals, and a supporting mesh plate and a supporting mesh are provided in the slope area around each reinforcing bar.
The area is smaller than that of the plate
After laying the mounting plate and the reinforcing reinforcing bar head, elastically press the pressure-supporting mesh plate from above the pressing plate.
Pressure, while subjected to continuous or discontinuous fence Engineering in the width direction of the slope placed apart in the length direction of the slope, preservation method of the natural slope, characterized in that. 2. The fence is constructed so as to extend continuously in the width direction of the slope across the pressure-supporting mesh plate, or between the two pressure-supporting mesh plates located vertically above and below the slope. A first slope area between the two support mesh plates located on the left and right in the slope width direction, and a second slope area between the two support mesh plates located above and below the slope in the longitudinal direction, or each support mesh. The natural slope conservation construction method according to claim 1, wherein construction is performed so as to intermittently extend in the slope width direction on the third slope area where the plate is laid. 3. A device used in the method for preserving a natural slope according to claim 1, wherein the reinforcing bar is inserted into the natural slope, and the net plate means for supporting pressure is laid in the slope area around the reinforcing bar. And the area is smaller than the net for supporting pressure, and the reinforcing bar head projects.
In this way, the pressing pre-polymerized on the pressure-supporting mesh plate is superposed.
Of the natural slope, and a spring means for elastically pressing the pressing plate and the supporting mesh plate from above by using the reinforcing bar head , and a fence means standing upright on the slope. apparatus. 4. The natural slope conservation device according to claim 3, wherein the support mesh plate means is a mesh plate material such as a wire mesh or expanded metal having a mesh or holes that does not hinder the growth of plants. 5. The natural sloped surface according to claim 3, wherein the spring means is a compression coil spring which is fixed to the head portion of the reinforcing bar and elastically presses the support net plate material through the pressing plate. Security device.