JPS5835729Y2 - Youheki European oysters - Google Patents

Description

[Detailed description of the invention] The present invention relates to a filter for draining groundwater that is installed on the back side of a retaining wall or irrigation canal wall. This invention relates to a filter for draining underground water to maintain soil in a stable state by filtering, permeating and draining water.

The filter for draining underground water of the present invention is a lightweight molded body, making installation extremely easy.

Conventionally, in the case of various types of retaining wall construction work such as railway construction and road construction, or irrigation work during land improvement such as farmland improvement and residential land development, there is an increase in groundwater that collects behind the retaining wall or irrigation canal, and the resulting increase in land nosho. In order to prevent retaining walls and irrigation canals from collapsing as a result of the rise of water, and to maintain the soil in good condition, drainage holes are made in places in retaining walls and irrigation canals, and in addition, drainage holes are made in places on the retaining walls and irrigation canals. Or 30 to 1 part
A filter material such as chestnut stone or cobblestone was placed in the tank to a thickness of about 0.00 cm, and water was collected and filtered using the filter material, and then drained through the drainage hole.

However, the conventional method is not always satisfactory; in order to put debris materials such as chestnut stones and cobblestones behind retaining walls and irrigation canals, it is necessary to pick up each debris material one by one, which requires a large number of hands and has poor work efficiency. It was something.

Moreover, these works had to be carried out after the retaining wall or irrigation canal was completed, and the work procedures were complicated.

On the other hand, recently, in order to improve the above-mentioned drawback, a hemispherical mesh plastic case and a layer of polyester non-woven fabric filter were installed inside the case, and two filters were installed inside the case.
This product is filled with crushed stones about 1/4 inch in size, covered with a plastic lid, and used as a filter for retaining walls or irrigation canals, or embedded in metal fittings for installation in water-permeable concrete filters, and installed in drainage holes with metal fittings. Although attachable filter materials have been developed, there are still some points that require improvement.

For example, in the case of the former method, although the work efficiency has improved compared to the conventional method, it is extremely difficult to attach to the retaining wall or irrigation water by driving nails, so an improvement is desired.

In the latter case, installation is easy as all you have to do is insert the metal fittings into the drain hole, but since the metal fittings are made of iron, iron rust will come out of the drain hole together with the water. However, since it uses the force of a spring, there are concerns about the installation condition.

Furthermore, when using this filter, it is necessary to use sand as one layer of the filter, which is a laborious process, and improvements are desired.

Therefore, the present inventors conducted various studies and research on a filter that has excellent water permeability and filtration performance and is easy to handle and work, and as a result, they were able to obtain a filter with excellent performance by having the following configuration. I found out.

The present invention is based on particles obtained by heating obsidian to 1000°C or higher, foaming and expanding, and having a diameter of 1.0 to IQ, Qmm, and a capacity of 0.
．． 0.06 to 0.30 g/crn3 of roughly spherical foamed particles at a rate of 0.02 to 0.6 g/cm per volume of the foamed particles.
This is a filter for a retaining wall, in which a filter material obtained by molding with adhesive No. 3 is attached to one end of a pipe.

Expanded obsidian particles obtained by heating at 1000° C. or higher are generally spherical particles, and each particle has a strong glassy layer on its surface and does not disintegrate easily.

Although volcanic glasses similar to obsidian, such as nacre and rosinite, are similarly heated, spherical foam particles are obtained.
The glassy layer on the surface of the particles is brittle, and the resulting particles tend to collapse.

The material of the filtration molded body of the present invention is made by fixing and molding the spherical foamed obsidian particles described above with a specific amount of adhesive, so that the particles are arranged in a manner similar to close packing, resulting in continuous channels with uniform pore spacing. It has liquid holes.

This filling mode increases the mechanical strength of the filter material.

Of course, water permeability depends on the particle size of the foamed particles used as raw materials, but water drainage filtration materials for retaining walls have a capacity of 0.06 to 0.30 g.
/cm3 particles with a particle diameter of 1.0 to 10゜m
It is appropriate to set it to m.

The adhesive can be an organic adhesive, an inorganic adhesive, or a mixture of organic and inorganic adhesives. Examples of organic adhesives include urea resin, melamine resin,
Phenol resin type, epoxy resin type, vinyl acetate solution type, vinyl acetate ethylene vinyl acetate emulsion type, hot melt type, other resins such as polyurethane, acrylic type, polyester type, synthetic rubber type, natural rubber type, asphalt type, etc. Adhesives can be used as a mixture of one or more of the following.

Preferred are fast-acting epoxy resin adhesives, polyester resin adhesives, and the like.

Further, as the inorganic adhesive, for example, cement, cement mortar, adhesive made of water glass and a hardening agent, etc. can be used.

Further, the adhesive made of a mixture of organic and inorganic materials includes an adhesive made of a mixture of the above-mentioned organic adhesive and inorganic adhesive.

Regarding the amount of adhesive used here, in order to obtain a molded product with excellent water permeability and adhesive strength, it is better to use 0.02 to 0.60 g/cm3 of adhesive per volume of foamed particles. A range of 0.03 to 0.40 g/cm3 is most desirable.

In other ranges, for example, if the amount of foamed particles is less than 0.02 g 7 cm3, the adhesive strength is weak;
There are drawbacks such as being unable to mold and harden and being easily broken, and on the other hand, the amount of adhesive is 0.6 per volume of foamed particles.
If the amount is more than 0 g/cm3, the adhesive strength will be excellent and it will not break easily, but it will be heavy and the water permeability will decrease, which is not desirable.

Filtration media are used to maintain soil such as roadbeds, roadbeds, and roadbeds in good condition during civil engineering work such as railways and roads, construction work, residential land development, and agricultural land improvement, and to ensure the safety of embankments, cut-out surfaces, structures, etc. It is a material that collects, filters, and permeates water to ensure smooth drainage of underground water.

There are no limitations to the shape or size, and various shapes such as plate, hemispherical, cylindrical, kamabot, triangular prism, etc. are possible.

A mesh plastic case may also be attached to the outside for reinforcement.

A pipe is a pipe that discharges the water collected by the filter material to the outside of the wall.

The material is not particularly limited, and any material such as plastic or metal can be used, but preferably a vinyl chloride pipe that does not corrode.

There is also no limit to the diameter of the pipe, and it may be used depending on the situation, but it is generally 10 cm or less in diameter.

Further, it is preferable to attach the pipe at the same time as the filter material is molded, but even if it is inserted and installed after molding, the performance is not affected in any way and the pipe exhibits excellent performance.

Furthermore, there is no need to attach it to a retaining wall or irrigation water, or to drive nails, and when constructing a retaining wall or irrigation water, a pipe with a filter material attached to one end can be used as a drainage hole, and a filter can also be attached at the same time. After the wall or irrigation water is completed, only backfilling work is required, or if it is necessary to remove the main formwork for construction such as a retaining wall, and therefore a filter cannot be installed at the same time, the main formwork After removing the
This can be done with very simple steps such as inserting a pipe into the drainage hole.

Furthermore, the drainage pipe with the filter material attached can be used directly as a drainage hole, but if the drainage hole is already attached, it is better to attach a pipe with an outer diameter that matches the inner diameter of the drainage hole to the filter material. It can be installed by inserting a pipe into the drain hole.

"Attachment" means to embed a part of the pipe into the filter material to make it integral, and the amount of embedding, the embedding angle, etc. can be freely changed according to the wall,
There are no restrictions.

This will be explained below with reference to the drawings.

1 to 5 are examples of the filter of the present invention.

FIG. 1 shows an example of a hemispherical filter, and FIG. 2 is a sectional view taken along line AA' in FIG. 1.

By attaching the drainage pipe a to the filter material made of foamed particles and adhesive with or without adhesive, it is possible to easily attach the pipe to the wall, and It is possible to collect, filter, and drain groundwater using just the invented filter.

3 and 4 show examples of plate-shaped filters, and FIG. 4 is a sectional view taken along line BB' in FIG. 3.

In this case as well, the effect is similar to that of the hemispherical filter shown in FIG.

Furthermore, Fig. 5 shows the hemispherical filter material shown in Fig. 1 with a mesh plastic case C attached for reinforcement, but the effect as a filter is the same as that of the filter without the plastic case shown in Fig. 1. There is no difference.

Furthermore, FIGS. 6 and 7 are construction examples in which the filter of the present invention is attached to a concrete retaining wall d.

Figure 6 shows an example in which a pipe attached to the filter material is directly used as a drainage hole for a retaining wall, and Figure 7 shows an example in which a pipe a attached to the filter material is inserted into a drain hole e that has already been installed. This is an example in which it is attached to the back of retaining wall d.

In either case, the work is easy and there is no difference in performance as a filter.

[Brief explanation of drawings]

Figures 1 to 5 are drawings showing an example of the filter of the present invention, where Figure 1 is a perspective view, Figure 2 is a cross-sectional view taken along line AA' in Figure 1, and Figure 3 is a diagram showing another example of the filter. FIG. 4 is a sectional view taken along line BB' in FIG. 3, and FIG. 5 is a perspective view showing yet another example. Moreover, FIGS. 6 and 7 are explanatory diagrams showing an example of construction when the filter of the present invention is attached to a concrete retaining wall. Here, the symbols in the diagram are a...pipe, b...
...Filtering material made of foamed particles and adhesive.

Claims (1)

[Scope of utility model registration request] Particles obtained by heating obsidian to 1000°C or higher, foaming and expanding, with a diameter of 1.0 to 10.0 mm and a capacity of 0.06 to 0.
A filter for draining underground water, which is made by attaching a filter material made of approximately spherical foam particles of 30 g/cm3 using an adhesive of 0.02 to 0.6 g/cm3 per volume of the foam particles to one end of a pipe. vessel.