JPS6211131B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slope protection method and a reinforcing material for slope protection.

In spraying methods such as mortar spraying, concrete spraying, and thick layer soil spraying, reinforcing materials such as wire mesh or reinforcing bars are often placed at the core of the sprayed material. As a general rule, it is preferable to place the reinforcing material at the center of the spray thickness. Conventionally, such a reinforcing material has been installed by a method such as binding the hook portion of the anchor pin and a part of the wire mesh using a wire, a coil, etc., since there is no suitable fixing metal fitting. However, it is difficult to drive the hook part of the anchor pin at a constant height and perpendicular to the ground, and the tying process is time-consuming, so it has been desired to simplify the reinforcement work. .

The present invention has been made in order to solve the problems in the conventional method described above, and an object of the present invention is to form a mat-shaped unit by incorporating reinforcing bars into a wire mesh in advance at a factory or on site. An object of the present invention is to provide a slope protection construction method and a reinforcement material for slope protection construction, which can simplify the installation and fixing of reinforcing materials on slopes.

That is, according to the present invention, reinforcement is achieved by inserting reinforcing bars between the circumferential intersections of adjacent wire rods of a wire mesh installed off-site, or by inserting reinforcing bars between the circumferential intersections of adjacent wire rods of a wire mesh installed on-site. A slope protection construction method is provided, which is characterized in that the material is separated from the ground, and then the spraying material is sprayed on the entire surface or a part of the slope.

Further, according to the present invention, there is provided a reinforcing material for slope protection work, characterized in that reinforcing bars are inserted between the circumferential intersections of adjacent wire rods of a wire mesh.

Next, the present invention will be specifically explained with reference to the accompanying drawings.

FIG. 1 is a plan view showing a part of the reinforcing material according to the present invention.

Generally, wire mesh as a reinforcing material used in the spraying slope protection method is often used in a size of about 2 x 5 m in consideration of transportation on the slope. The wire diameter of the wire mesh is 2 mm, and the mesh size is approximately 52 mm. In the present invention, prior to laying the wire mesh on the slope, the intersection points 1a of the wires adjacent to each other of the wire mesh 1, Reinforcing bars 2 are passed through the spaces 1a in the same direction to form a mat-shaped reinforcing material unit. That is, between the circumferential intersection portions 1a, 1a of the adjacent wire rods constituting the wire mesh 1, the reinforcing bars 2 are located between the circumferential intersection portions 1a, 1a of the adjacent wire rods.
The reinforcing bars 2 are inserted in series so as to be wrapped in each of the parts. The arrangement of the reinforcing bars 2 is appropriately selected depending on the construction method. For example, when spraying mortar or the like over the entire surface, one or two mortar may be placed at regular intervals. You can arrange as many as you like as needed. The reinforcing bars 2 are attached to the wire mesh 1 at the factory when the wire mesh 1 is manufactured.
It may be incorporated into the
Prior to or during the installation, between the circumferential intersection parts 1a and 1a of the adjacent wire rods of the wire mesh 1,
Alternatively, it may be expanded and the reinforcing bars 2 inserted therethrough to form a reinforcing material unit of the wire reinforcement mesh.

When the wire mesh 1 with the reinforcing bars 2 arranged in this way is laid on the ground, fixing fittings are used to hold the reinforcing bars 2 at a constant height from the ground. As for the fixing fittings, Utility Application No. 56-136814, which is related to the applicant's earlier application, is used.
Preferred is a fixture 3 (FIG. 2) as disclosed in US Pat. The fixture shown in FIG.
and a leg piece 32, and an insertion notch 33 is formed in the support piece 31, through which a wire rod or reinforcing bar 2 of the wire mesh is inserted, and is housed and held in the deep part of the hole. The reinforcing bars 2 are supported at a predetermined height from the ground. Also, leg piece 3
2 is formed with an insertion hole 34 for anchor fixing, and when it is necessary to firmly fix the fixture 3 on a slope, an anchor is driven through the insertion hole 34 and the fixture 3 is fixed on the slope. Can be fixed. The fixture 3 may be attached to the reinforcing bars in advance, or may be attached at the time of installation. The reinforcing bars 2 are held at a constant height by fixtures on the ground.
It is connected to the reinforcing bars of the reinforcement unit laid adjacently using joint fittings or binding wires.
If necessary, additional wire nets may be connected to each other.

In addition to the reinforcing bars 2 arranged on the wire mesh 1, additional reinforcing bars can also be arranged in another direction. for example,
If the reinforcing bars 2 are placed in advance so that they are horizontal with respect to the wire mesh 1 when laying the ground,
Furthermore, it is also possible to arrange vertical stripes that extend above and below the ground. In this case, vertical bars may be connected with wire to the reinforcing bars 2 that have been arranged in advance on the wire mesh, as described in Utility Model Application No. 56-136814
The structure may be such that the reinforcing bars are supported vertically and horizontally using the fixtures 4 shown in the figure. These means can also be used in combination. The fixture 4 shown in FIG.
1 and 41', leg pieces 42 and 42' are formed, and one of the leg pieces 41 and 41' is overlapped. According to this configuration, the wire mesh 1 or the reinforcing bars 2,
2' into the insertion notches 43, 43' formed similarly to the insertion notch 31 of the fixture 3 described above,
By holding the wire mesh 1 or reinforcing bar 2,
2' can be easily supported in a crossed state.

FIG. 4 shows an example of reinforcement for a slope protection method using the reinforcing material according to the present invention.
The reinforcing materials used in this example are wire mesh 1 and reinforcing bars 2.
Two threads are inserted at regular intervals. The reinforcing bars 2 are arranged horizontally when installed on the ground. In the slope protection construction method of this example, in addition to the horizontal reinforcing bars 2, vertical bars 2' are further arranged. The vertical bars 2' are arranged in pairs at approximately the same intervals as the reinforcing bars 2. The reinforcing bars 2, 2' are fixed to the ground using fixtures 3. The wire mesh 1 may be laid so that it is horizontal to the ground, the entire surface thereof is a certain distance from the ground, or it may be laid so that there are steps at the reinforcement locations. In order to stretch the wire mesh 1 horizontally, the aforementioned fixing devices 3 and 4 or ordinary hook pins for supporting the wire mesh may be used. The vertical bars 2' may be fixed to the wire mesh 1 and/or the reinforcing bars 2 by connecting them with wire or the like. As described above, the reinforcing material units of the wire reinforcement mesh laid on the ground are connected to each other by connecting at least two reinforcing bars to each other by joints or wire connections. wire mesh 1
They may be further connected to each other.

After reinforcing as shown in FIG. 4, mortar, concrete, and thick layer soil are sprayed using the reinforcing bars 2 and 2' as core materials. At this time, in the case of mortar and concrete spraying, it may be done uniformly so as to be horizontal to the slope, or it may be done so as to construct a slope.

Next, a specific example of a slope protection method using the reinforcing material of the present invention will be shown.

FIG. 5 shows an example of construction in which a wire mesh is stretched horizontally on the ground 5. As for the arrangement of the reinforcing bars, the reinforcing bars 2 arranged on the wire mesh are arranged horizontally, and then the reinforcing bars 2'
may be arranged vertically, or only the reinforcing bars 2 may be arranged horizontally or vertically. Mortar spraying 6, concrete spraying 7, or thick layer soil spraying 8 is applied to the entire surface or a part of these reinforcing materials. Compared to conventional methods, it is easier to lay the reinforcing material, and since the reinforcing material can be maintained at a constant height, it can be positioned at the core of the spray material.

The construction example in Figure 6 shows reinforcing bars 2 arranged in wire mesh 1.
The reinforcing bars 2 are supported by fixtures 3 or 4 so as to form steps at the locations, and mortar 6 or concrete 7 is sprayed onto the reinforcing bars 2 to construct the legal framework. Using this construction method, it is also possible to create a horizontally stepped horizontal structure. Furthermore, a lattice-like legal framework can be constructed by laying vertical reinforcements. As shown in FIG. 6, mortar 6 or concrete 7 may be sprayed between the slopes, or a thick layer of soil 8 or vegetation bags may be placed between the slopes.

If it is necessary to further widen the legal framework,
As shown in FIG. 7, a plurality of fixtures 3 or 4 may be used side by side, and mortar 6 or concrete 7 may be sprayed between them to form a legal frame.

Figures 8 to 10 show construction examples in which the slope protection method of the present invention is carried out by spraying thick layers of soil.
Generally, in the thick layer soil spraying construction method, there is a problem of the spraying material being washed away, but in this construction example, by installing the reinforcing material according to the present invention, the washing away of the spraying material is effectively prevented.

In the examples shown in Figs. 8 and 9, the fixing device has the structure shown in Figs. 2 and 3, and the height of the head of the fixing device is the spray thickness, so the fixing device can be used to measure the spray thickness. It can also be used in place of a shaku pin.

As is clear from the above, according to the present invention, since a pine-shaped reinforcing material unit in which reinforcing bars are integrated with a wire mesh is formed in advance,
Compared to conventional construction methods, laying and fixing work on slopes is easier. In particular, when reinforcing bars are placed in only one direction relative to the ground, the reinforcement work can be completed at the same time as the unit is laid. Further, since the reinforcing bars and the wire mesh are integrated, by holding the reinforcing bars at a constant height above the ground, it becomes possible to easily position the wire mesh at the core of the sprayed material. Therefore, the strength of the sprayed material as a whole increases. Since the reinforcing bars are inserted in a fixed direction relative to the wire mesh, it becomes possible to easily add steps to the wire mesh. This makes it easier to spray a thick layer of soil and construct a slope.

On the other hand, in the reinforcing material of the present invention, the reinforcing bars are inserted in series between the intersection points of the wire rods so that the reinforcing bars are wrapped in each of the surrounding portions of the adjacent wire rods. When the pine-shaped reinforcing material unit that has been prepared is expanded on a slope, as it is expanded, it is pulled by the adjacent wire rods, so that the reinforcing bars are accurately positioned between the circumferential intersections of the wire rods. As long as the reinforcing material unit is maintained in tension, the reinforcing bars will not shift during construction such as spraying. Therefore,
For example, when constructing a slope using the reinforcing material according to the present invention, if the reinforcing bar spacing is determined in advance, these reinforcing bars can also be used for measuring the spacing of the slope, and can also be used for spraying mortar. It serves as an indicator.

On the other hand, it is also possible to insert reinforcing bars only in the looped part of one wire rod, but in this case, the reinforcing bars will move freely between the looping pitches of one wire rod, and the position will not be fixed, resulting in the above-mentioned problem. The effects of the present invention cannot be expected. In addition, in this method, in general, in the wire mesh, the distance in the circumferential intersection is large, whereas in the middle part of the winding pitch, when the wire mesh is placed on a flat surface, the distance in the height direction is narrow. Therefore, it is difficult to insert thick reinforcing bars into a certain wire mesh, and therefore only reinforcing bars with low strength can be inserted.
In general wire mesh, in the direction in which a single wire rod continues to be wound, there are irregular irregularities in the middle part of the wire rod, making it difficult to insert reinforcing bars. On the other hand, in the present invention, the reinforcing bars are inserted not at the middle part of the wire but at the intersection points of the wires, which have a larger interval in the height direction, so thicker reinforcing bars can be inserted, and the reinforcing effect of the reinforcing bars is large. Furthermore, because the wire mesh is knitted, the intersection points of the wire rods are regularly arranged in a line, so it is extremely easy to insert the wire mesh.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a part of a pine-shaped reinforcing material unit made of integrated wire mesh and reinforcing bars according to the present invention, and FIGS. 2 and 3 show a fixing device used in the slope protection method of the present invention. FIG. 3 is a perspective view showing a preferred example, FIG. 3 is an explanatory plan view showing an example of reinforcement using the reinforcing material according to the present invention, and FIGS. 4 to 10 are explanatory views showing construction examples of the slope protection method of the present invention. It is. 1... Wire mesh, 2, 2'... Rebar, 3, 4... Fixture,
31, 41, 41'...Support piece, 32, 42, 4
2'... Leg piece, 33, 43, 43'... Insertion notch, 3
4, 44, 44'...Insertion hole, 5...Mound, 6...Mortar, 7...Concrete, 8...Thick layer soil.

Claims (1)

[Claims] 1. A reinforcing material in which reinforcing bars are inserted in series between the intersection points of the circumferences of adjacent wire rods constituting the wire mesh so that the reinforcing bars are wrapped in each of the circumference portions of the adjacent wire rods is inserted into the ground. A slope protection method characterized by spraying spray material on the front or part of the slope. 2. The slope protection method according to claim 1, wherein after the reinforcing material is laid, at least the reinforcing bars of the reinforcing material laid adjacent to each other are connected to each other. 3. The slope protection method according to claim 1, in which a wire mesh section with reinforcing bars arranged in advance and a wire mesh section without reinforcing bars are installed with a difference in level. 4. The slope protection method according to claim 1, wherein the reinforcing bars arranged in advance are located approximately at the center of the sprayed material. 5. The method according to claim 1, characterized in that reinforcing bars arranged in advance are held at a constant height from the ground by a fixture, and the head of the fixture is used to measure the spray thickness. Surface protection method. 6. A reinforcing material for slope protection work, characterized in that reinforcing bars are inserted in series between the intersection points of the circumference of adjacent wire rods constituting the wire mesh so that the reinforcing bars are wrapped in each of the circumference sections of the adjacent wire rods. .