JPH0141793Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a retaining wall for roads, seawalls, etc.

[Prior art] Retaining walls conventionally used for roads, seawalls, etc. include so-called cast-in-place concrete retaining walls in which formwork is assembled on-site and concrete is poured into it, and retaining walls in which concrete blocks are cast in place. The Machi block retaining wall is known as a retaining wall that is built using gravel. The former requires complicated on-site work such as formwork and shoring, which requires many skilled workers and manpower, and the time-consuming process of dismantling the formwork after construction, which lengthens the construction period and increases construction costs. There are problems such as. On the other hand,
The latter type of block retaining wall has the advantage of shortening the construction period and reducing construction costs because blocks formed in a factory are piled up on site. The construction of this block retaining wall will be explained with reference to FIGS. 2 to 4. For example, as shown in FIG. 2, the interlocking block 1 includes a substantially rectangular plate-shaped wall 2;
The four surfaces erected on the back surface are made up of pillars 3 each having a curved and tapered shape. This time knowledge block 1
are placed on a foundation (not shown) installed on the ground where the retaining wall will be installed, and stacked up one after another as shown in Figure 3. Along with this, separately prepared formwork 4
is brought into contact with the end face 3a of the column 3 of the special block in parallel with the wall 2 by back filling work with back gravel 5,
Next, the concrete 6 is poured into the space S formed by the column 2 and the wall 4 of the block 1. As shown in FIG. 4, the concrete body 6 also has the role of fixing the gravel 5 and integrating the retaining wall structure 7, so the formwork 4 is usually a punched formwork. If the formwork 4 is removed too early, there is a risk that the concrete will flow into the gravel 5, the strength of the concrete 6 will be impaired, and the block 1 will move slightly.
There is a problem in that the gravel 5 is mixed into the concrete 6 and a strong earth retaining wall structure 7 cannot be formed.
Therefore, it is necessary to remove the frame in a timely manner, but it is difficult to judge whether it is necessary, and if it is delayed, the retaining wall structure 7 will be integrated with the inner block 1, the concrete 6, and the back gravel 5, which will become the edge of the block, similar to burying. First, there is the problem of causing the retaining wall to collapse. To solve this problem,
It has been proposed that the formwork 4 is a buried formwork made of a material such as cardboard. However, materials such as cardboard are difficult to dissolve in water, so they remain in the concrete after concrete is poured.
There is a problem in that the wall concrete and the backing gravel are cut off, and a strongly integrated earth retaining wall structure 7 is not formed.

[Purpose of the invention] The present invention was devised in view of the above-mentioned problems, and its purpose is to provide a retaining wall that provides a strong earth retaining wall structure.

[Structure of the invention] The retaining wall for the machi block according to the present invention has a buried form made of mesh wire mesh and water-soluble paper interposed between the machi block, the concrete body and the backing gravel.

[Operation and effect of the invention] The present invention is constructed as described above, and the water-soluble paper body prevents the concrete from flowing into the backing gravel, and after a certain period of time, dissolves in water and spreads the concrete from the backing. It flows out to the gravel side and fixes the back gravel, and the mesh wire mesh holds the water-soluble paper,
After the water-soluble paper dissolves in water, it prevents gravel from getting mixed into the concrete, resulting in a strong retaining wall structure. In carrying out the present invention, the water-soluble paper material is made of water-resistant kraft paper, etc., which dissolves in water within 30 minutes to 3 hours after pouring concrete and allows it to flow into the gravel behind the concrete. It is preferable to use industrial paper or tar-impregnated paper (tarpaulin paper), and it is preferable to use a wire mesh with a mesh size of 3 to 7 cm, which is smaller than the backing gravel.

[Example] An example of the present invention will be described below with reference to FIG. In this figure, parts corresponding to those in FIG. 3 are designated by the same reference numerals and redundant explanation will be omitted. In FIG. 1, a burying form 8 is interposed between the interstitial block 1, the concrete 6, and the gravel 5. This burial form 8 is composed of a water-soluble paper material 9 on the front side, that is, on the side of the interstitial block 1, and a mesh wire gauze 10 on the back side, that is, on the back gravel 5 side. The water-soluble paper material 9 is made of, for example, industrial paper such as kraft paper or tarpaulin paper that dissolves in 30 minutes to 3 hours due to moisture, and the mesh wire mesh 10 is made of gravel 5 with a mesh of 3 to 7 cm. It is longer than the wire mesh of the smaller mesh. Note that the configurations of the water-soluble paper body 9 on the front side and the mesh wire mesh 10 on the back side may be reversed. The construction of a block retaining wall using this buried formwork 8 is similar to the construction shown in FIG. 3, and the only difference is that the formwork 8 is buried.

Since the present invention is constructed as described above, the poured concrete 6 is connected to the mesh wire mesh 1.
The water-soluble paper body 9 maintained at zero temperature prevents it from flowing into the gravel 5, but after 30 minutes to 3 hours, the water-soluble paper body 9 dissolves due to the water content of the cochlear material 6.
The concrete flows onto the back gravel 5, thereby fixing the back gravel 5. Before the back gravel 5 is fixed, even if the water-soluble paper 9 is melted, the mesh wire mesh 10 prevents the back gravel 5 from getting mixed into the concrete 6.
In this way, the backing gravel 5 is fixed with concrete, and a strong earth retaining wall structure 7 is obtained.

[Summary] As explained above, according to the present invention, the burial formwork is constructed of mesh wire mesh and water-soluble paper, so that the backing gravel is better fixed to the concrete, and the backing gravel to the lining concrete is As a result, a strong earth retaining wall structure can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view showing an example of a machi block, and Fig. 3 is before removing the frame when constructing a machi block retaining wall using conventional formwork. FIG. 4 is a side sectional view showing the state after the frame is removed. DESCRIPTION OF SYMBOLS 1...Machi block, 5...Back gravel, 6...Bulk concrete, 8...Burning formwork, 9...Water-soluble paper, 10...
mesh wire mesh.

Claims (1)

[Scope of utility model registration request] In the machi block retaining wall where the machi blocks are piled up using a combination of concrete and back gravel, a buried type made of mesh wire mesh and water-soluble paper is placed between the machi blocks, the concrete and the back gravel. Machi block retaining wall is characterized by having a frame interposed therein.