JPH0547787Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention uses band-shaped coils to fix the lath that is laid in advance to the target surface when spraying concrete or mortar in slope stabilization methods. Regarding the fixed structure.

[Conventional technology]

Lath tensioning is used in combination with slope stabilization methods. In this case, when performing lath tensioning before spraying a spraying material such as mortar M on the slope, the lath is spaced a certain distance from the slope and the lath wire mesh is fixed at appropriate intervals on the slope. A fixture that doubles as a spacer is used.

As a conventional example of such a fixture, as shown in FIG. 5, an M-shaped steel wire 30 and an angle steel wire 31 are integrated at the top, and a reinforcing lath R wire is placed in the M-shaped trough. The one shown in Fig. 6 is a flat plate having an insertion notch 40 into which the lath R wire is inserted, and the lower parts 42 and 42' of the flat plate 41 are bent and formed to be fixed to the slope. (see Japanese Patent Publication No. 61-14734), as shown in Figure 7.
Pipe 50 having an axial length equal to the spray thickness S
is installed in advance before laying the reinforcing material, and an anchor pin 51 is driven through the hollow shaft part of this pipe 50 to fix it to the slope E, instead of the previous pipe, the pipe shown in FIG. It has been proposed to use a cylindrical or prismatic solid block (having a length equal to the spray thickness) and simply install it on the slope before laying the reinforcing material.

[The problem that the idea attempts to solve]

However, each of the above fixtures has the following problems.

The above-mentioned fixture requires time and effort for forming, welding, etc., and simply places the steel wire thereon, so there is a risk that the steel wire may come up and the fixture may fall.

The above-mentioned fixing devices require processing such as notching and bending the flat plate, which is time-consuming. In addition, the fixing devices must be installed on the slope before lath tensioning, making it difficult to set appropriate installation intervals. It is. Furthermore, the work procedure is limited.

With the above-mentioned fixing device, installing the pipes in advance at the required locations and driving the anchors into each pipe after laying the lath are separate steps, which requires a great deal of effort. Furthermore, so-called nests are formed at the locations where the pipes are installed. When this nest is formed, cracks may occur in concrete, etc. from that part.

Similar to the above, the above fixing devices are troublesome to install, and they are difficult to install if a worker steps on them when installing the lath.
There is a risk of the block falling over. Also, similar to the above, nests are formed.

Thus, while each fixture has its own drawbacks, the fundamental problem is that it must be installed before the lath is stretched, and once the lath has been stretched, Even if the situation is not appropriate, it is difficult to correct it, so enforcement must end at that point.

Therefore, the main problem of the present invention is to enable the coil to be installed and fixed after the lath is laid.

[Means to solve the problem]

The above-mentioned problem consists of a band-shaped coil made of a band-shaped spring material and formed in a spiral shape on a plane, and a lath installed at a distance on the target surface, and the coil is formed from a mesh to a lath in a state where the spiral is contracted. This can be solved by inserting it downward, releasing the contraction and restoring it to a larger size than the mesh, and installing it between the lower surface of the lath and the target surface.

[Effect]

In the present invention, the fixing device is made of a band-shaped elastic material, and the band plate is usually a spiral coil.
The material is inexpensive.

Moreover, the most characteristic feature is that the coil is contracted,
In the contracted state, the lath is inserted through the mesh of the lath under the lath, the contraction is released and the lath is restored to a larger size than the mesh, and it is installed between the bottom surface of the lath and the target surface, so after the lath is installed, A coil can be installed and the entire lath can be easily raised uniformly from the target surface.

Furthermore, by molding the width of the coil to be the same as the target lifting height of the lath, the coil can be used as a measuring spacer. Further, as described later in the coil, by forming a large number of through holes, the formation of cavities can be easily prevented. What's more, after installation, the effective area for supporting the lath increases as the coil is restored, so the installation itself reduces the risk of falling over, and if necessary, by driving an anchor into the center of the coil, the lath can be firmly fixed. Become.

〔Example〕

A specific example of the present invention will be described below with reference to FIGS. 1 to 4.

As shown in FIG. 1, a coil 1 serving as a fixing device for the lath 2 with respect to the target surface according to the present invention, a normal slope E, is a band-shaped coil made of a band-shaped spring material and formed in a spiral shape on a plane. It is said that

On the other hand, a lath 2 is prepared as a reinforcing material for the sprayed material such as mortar M.

When fixing the lath 2 to the target slope E using the coil 1, the lath 2 is first developed onto the slope E. Next, at a predetermined target fixation position, the second
As shown in the figure, bring in the coil 1, insert it through the mesh below the lath with the spiral contracted, and then
As shown in the figure, the shrinkage is released and the net is restored to a larger size than the mesh, and then installed between the lower surface of the lath 2 and the slope E.

This operation is also performed at other predetermined locations to separate the entire lath 2 from the slope E. Next, a spraying material such as mortar M is sprayed.

On the other hand, if the width of the coil 1 is set in advance to a target distance from the slope E of the lath 2, the coil 1 can be used as a spacer.

On the other hand, as shown in FIG. 4, if a large number of through holes 1a are formed in the coil 1, the formation of cavities is prevented when the mortar M is sprayed. Also, if necessary, as shown in Figure 3, the anchor pin 3 can be attached to the coil 1.
If it is fixed by penetrating the center and driving it into the slope E, the fixation will be strong.

As the material of the coil according to the present invention, a steel plate is usually used from the viewpoint of cost, but other metal plates may be used. Furthermore, the through holes can be formed using punched metal, and also can be formed using spiral wire mesh. The material may be plastic or the like. However, it is necessary to form the spring material from a resilient spring material. As a spraying material,
In addition to mortar, concrete, and cement paste, appropriate materials such as greening materials are used.

[Effect of idea]

As described above, according to the present invention, the coil can be installed after the lath is stretched. Therefore, for example, if you find that a part of the coil is sagging after finishing the work of fixing the lath, it is necessary to lift it up by inserting it through the mesh of the coil lath. The ability to do this means that the entire lath can be buried uniformly at a predetermined height position in the sprayed material, which is effective in improving the strength of the target surface. It also has the advantage of low material cost.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of the coil of the present invention;
The figure is a perspective view of the coil being inserted into the lath, Figure 3 is a perspective view of the completed coil installation, Figure 4 is a perspective view of another strip coil, and Figures 5 to 8 show various conventional fixing devices. It is a diagram. 1... Coil, 2... Lath, M... Mortar,
E... Law surface.

Claims (1)

[Scope of utility model registration request] It consists of a band-shaped coil made of a band-shaped spring material and formed in a spiral shape on a plane, and a lath laid apart on the target surface, and the coil is inserted through the mesh below the lath with the spiral contracted. , a lath fixing structure characterized in that the contraction is released and the lath is restored to a greater extent than the mesh, and the lath is installed between the lower surface of the lath and the target surface.