JPH10314719A - Soaking structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent contamination of soil by adsorbing and fixing heavy metals dissolved or suspended in rain water falling on the ground into which heavy metals are dissolved. SOLUTION: Crushed stone layers 3 are laid around both soaking pipes 1 flowing out water in the process that penetration holes la are formed on the circumferential wall and water is passed through the penetration holes 1a and a soaking well 2 for storing water and flowing out the stored water through penetration holes 9a. Also, the crushed stone layers 3 are covered with water- permeable sheets 4. Filters 7 are fitted to the above-mentioned penetration holes 1a, 9a. The filters 7 comprising frame bodies and accommodate crushed bodies selected from among raw ore of tourmaline, crushed bodies obtained by crushing tourmaline, calcined bodies 8 obtained by mixing the crushed tourmaline with the ceramics raw material and burning the mixture, crushed bodies obtained by crushing the calcined bodies 8, molded forms obtained by mixing the crushed tourmaline with synthetic resin raw material and molding the mixture and crushed bodies obtained by crushing the molded forms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the collection and distribution of rainwater or the like that has fallen on the surface of the earth, and the storage of the rainwater. In the course of this distribution and storage, when water permeates into the ground, it absorbs heavy metal ions dissolved in the water. It relates to a permeation structure that can be fixed.

[0002]

2. Description of the Related Art Rainwater, which has fallen on the ground surface, for example, a road, a park, or a residential area, is collected in a gutter, distributed through a conduit composed of distribution pipes, and stored in a storage pipe. There is a system that tries to infiltrate into the ground. With this system, it is possible to reduce the temporary rise of rivers during precipitation and recharge groundwater.

[0003] The infiltration system uses an infiltration tube having a permeation hole formed around both the flow pipe and the storage pipe. A crushed stone element is laid around the infiltration pipe with a predetermined thickness, and the crushed stone element is seated with a sheet element. It is configured so as to be wrapped so that water flowing or stored in the infiltration tube can penetrate into the ground through the infiltration hole, the crushed stone element and the sheet element. In particular, since the crushed stone element is wrapped in the sheet element, the surrounding earth and sand do not enter between the crushed stone elements, and a good infiltration action can be maintained.

On the other hand, various exhaust gases and fine powders of heavy metals mixed into the atmosphere are present on the road surface. Therefore, in rainy weather, the heavy metals dissolve or suspend in rainwater, and the rainwater permeates the ground.

[0005]

In the above water infiltration system, heavy metals dissolved or suspended in rainwater may penetrate into the ground and contaminate the soil over a long period of time. For this reason, it is preferable to separate and fix heavy metals in the process of rainwater penetration.

It is an object of the present invention to provide a permeation structure capable of adsorbing and fixing heavy metals dissolved in rainwater.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, a permeation structure according to the present invention comprises a raw stone of tourmaline that generates hydroxyl ions in a hole through which flowing water or stored water flows out into the ground. A crushed body of crushed tourmaline, a fired body obtained by mixing powder of crushed tourmaline with ceramic raw material and firing, a crushed body of crushed fired body, and a powder of crushed tourmaline mixed with synthetic resin raw material to form And an underground structure fitted with a filter containing the ore, crushed body, fired body, and formed body selected from the group consisting of a formed body, a crushed body obtained by crushing the formed body, It is characterized in that crushed stone is laid around the middle structure.

[0008] In the above-mentioned permeation structure, a raw stone of tourmaline for generating hydroxyl ions is formed in a hole formed in an underground structure such as a permeation pipe or a permeation well having a function of permeating flowing water or stored water. Crushed body of crushed tourmaline, fired body of ceramic mixed with tourmaline powder, crushed body of baked body, molded body of synthetic resin, crushed body of crushed body Ore, crushed body, fired body,
Since a filter containing a formed body (hereinafter, referred to as a “fired body”) was fitted, when water flows out of the permeation pipe or the hole of the permeation well into the crushed stone layer, tourmaline or the fired body, Hydroxide ions, which are negative ions, are generated by the discharging action of tourmaline mixed with the compact. Therefore, when the water in which the heavy metal is dissolved or suspended by flowing on the ground surface flows out of the underground structure, the ions of the heavy metal dissolved in the water by the generated hydroxyl ions can be absorbed and fixed. In addition, even when an organic substance is present in water flowing over the ground, the hydroxyl ions can be adsorbed and fixed.

In the above infiltration structure, it is preferable to cover the underground structure and the crushed stone layer laid around the structure with a water-permeable sheet having water permeability. In this way, by covering the periphery of the crushed stone layer with a water-permeable sheet having water permeability, water flowing in the underground structure penetrates into the ground from the structure through the crushed stone layer and the water-permeable sheet. And prevent the surrounding earth and sand from invading the crushed stone layer side to prevent clogging.

The ceramic raw material preferably includes not only porcelain raw material but also ceramic raw material and sludge incineration ash. By mixing the raw stone of tourmaline or the powder of tourmaline with such a raw material, various fired bodies can be manufactured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the above-mentioned permeation structure will be described below with reference to the drawings. FIG. 1 is a schematic diagram illustrating a schematic configuration of a permeation structure. FIG. 2 is a diagram illustrating a structure of a junction between a permeation well configured by vertically disposing permeation tubes and a permeation tube disposed horizontally by a permeation tube. FIG. 4 is a cross-sectional view illustrating the structure of the permeation tube portion, and FIG. 4 is a diagram illustrating the configuration of the filter.

[0012] The infiltration structure is such that rainwater or the like that has fallen on the surface of the ground is passed through an infiltration tube 1 which is an underground structure buried in the ground.
In the same manner as described above, the water is collected in the infiltration well 2 serving as an underground structure, and can be discharged into the ground in the course of flowing through the infiltration tube 1 or from the infiltration well 2. A crushed stone layer 3 is laid around the infiltration tube 1 and the infiltration well 2.

In the crushed stone layer 3, voids are formed between the individual crushed stones, so that the earth and sand constituting the soil may enter the voids and sink the ground surface. Therefore, the crushed stone layer 3
Is covered with a water-permeable sheet 4 so that the permeation tube 1 and the permeation well 2
The water that has flowed out of the crushed stone layer 3 and passed through the crushed stone layer 3 is filtered, and soil and sand from the soil are prevented from entering the crushed stone layer 3, thereby preventing land subsidence.

The infiltration tube 1 is buried in a side groove 5 so as to connect a square 6 and a manhole-shaped infiltration well 2 arranged at a predetermined interval. Accordingly, rainwater or the like that has fallen on the ground surface flows through the infiltration pipe 1 through the gutter 5 to the gutter 6 and is stored in the infiltration well 2. In the course of flowing through the infiltration tube 1 and in the state of being stored in the infiltration well 2, the water flows out or leaches into the ground.

The permeation tube 1 is formed of a fume tube, and has a plurality of permeation holes 1a at predetermined positions on the peripheral wall. As shown in FIG. 4, a filter 7 including a pair of detachable filter frames 7a and 7b is fitted into the permeation hole 1a. The water flowing inside the permeation tube 1 is filtered by a filter 7.
Through the crushed stone layer 3 and through the water-permeable sheet 4 into the soil.

In the filter 7, a raw material of tourmaline or a powder of crushed tourmaline that generates hydroxyl ions upon contact with water is mixed with a ceramic raw material and fired, and a fired body and a powder of crushed tourmaline are synthesized. A molded body (hereinafter, referred to as a “baked body 8”) formed by mixing with a resin material and molding is accommodated. Therefore, when the water flowing through the permeation tube 1 passes through the permeation hole 1a, it comes into contact with the fired body 8 to generate hydroxyl ions,
The hydroxyl ions can be fixed by adsorbing heavy metal ions dissolved or suspended in water.

The infiltration well 2 basically has a cylindrical pipe 9, a sloping wall pipe 10, a lid 11 and the like made of a concrete pipe, like the manhole in the sewer pipe. In particular, the cylindrical pipe 9 has a bottom plate compared to the manhole of the sewer pipe.
12 are installed at a deeper position and are configured to be able to store a sufficient amount of water.

The cylindrical tube 9 constituting the infiltration well 2 has the same function as the infiltration tube 1 and has a plurality of infiltration holes 9a formed at predetermined positions on the peripheral wall. The accommodated filter 7 is fitted.

The fired body 8 is formed in the form of gravel or crushed stone obtained by crushing tourmaline into a powder, mixing it with a ceramic material, and firing the mixture. In this embodiment, a fired body is used. However, in the present invention, tourmaline that generates negative ions is crushed into rough stones that cannot pass through the eyes of the filter 7 and tourmaline into particles that cannot pass through the eyes of the filter 7. It is possible to use a crushed body, a crushed body obtained by crushing tourmaline into a powder and mixing it with a synthetic resin material and molding, a crushed body obtained by further crushing the fired body 8, and a crushed body obtained by further crushing the formed body. It is possible.

The ceramic raw material for forming the fired body 8 is not limited to a so-called fine ceramic raw material, but may be clay, which is an old ceramic raw material such as pottery. Sludge incineration ash produced by incineration of sludge can be used as a raw material.

As typical components of sludge incineration ash, CaO,
_{31.2%, SiO 2, 23.3%} , Fe 2 O 3, 13.6%, Al 2 0 3, are those containing 8.5%.

In the fired body 8, a large number of electrodes are exposed on the surface, and discharge at a minute voltage (about 1 V) is repeated. Therefore, when the fired body 8 is submerged, the water is decomposed into positive ions of hydrogen and negative ions of hydroxyl ions with the discharge, and the hydroxyl ions adsorb and fix heavy metal ions present in the water. It is possible.

The water-permeable sheet 4 is constituted by a sheet of synthetic resin fibers woven into a cloth. For this reason, the water permeable sheet 4 can allow water to pass freely, and can cover the crushed stone layer 3 to prevent intrusion of earth and sand.

Next, a method for realizing the above-described permeation structure will be briefly described. In this permeation structure, the crushed stone layer 3 is laid around the permeation pipe 1 and the permeation well 2, and the crushed stone layer 3 is covered with the water-permeable sheet 4.

That is, excavation is performed at a predetermined depth along the buried path of the infiltration tube 1 and a predetermined position of the infiltration well 2 is excavated at a predetermined depth. The digging bottom is rolled and the permeable sheet 4 is spread. Next, the crushed stone layer 3 was placed on the permeable sheet 4 for 35 minutes.
Roll it down by laying it down to a thickness of 60 cm to 60 cm.
Laying while connecting. At a position corresponding to the infiltration well 2, the bottom plate 12, the cylindrical tube 9, and the inclined wall tube 10 are sequentially stacked on the crushed crushed stone layer 3, and the infiltration tube 1 is connected to a predetermined cylindrical tube 9.

Thereafter, the crushed stone layer 3 is laid on both sides and the upper part of the infiltration tube 1 and the infiltration well 2 to a thickness of 35 cm to 60 cm and is compacted.
Further, the upper portion of the crushed stone layer 3 is covered so as to involve the water-permeable sheet 4 and backfilling is performed, thereby completing the infiltration structure.

In the infiltration structure configured as described above, the rainwater that has fallen on the surface of the earth and which has been ionized due to the dissolution or suspension of heavy metal flows through the infiltration pipe 1 through the gutters 5 and 6 to infiltrate. Store in well 2.

When the level of water flowing inside the permeation tube 1 becomes higher than that of the permeation hole 1a, the water comes into contact with the fired body 8 when passing through the filter 7 fitted into the permeation hole 1a. Also, when water is stored in the infiltration well 2, the water will
12. Touch the fired body 8 when passing through the filter 7 fitted in the permeation hole 9a of the cylindrical tube 9.

The water that has come into contact with the fired body 8 promotes ionization,
Large amounts of negative ions are generated. The generated negative ions adsorb and fix heavy metal ions present in water, and new negative ions are generated. This reaction continues while water flows out of the infiltration tube 1 and the infiltration well 2, and the water from which heavy metal ions have been removed permeates into the ground. Therefore, there is no risk of contaminating the soil with heavy metals.

Further, by covering the crushed stone layer 3 with the water permeable sheet 4, the water permeable sheet 4 functions as a screen to prevent the surrounding earth and sand from entering the layer of the crushed stone layer 3 and always provide good penetration. The performance can be maintained, and the settlement of the ground can be prevented.

[0031]

As described in detail above, the infiltration structure according to the present invention is formed in an infiltration tube and an infiltration well, which are underground structures having a function of infiltrating flowing or stored water into the ground. Raw stone of tourmaline that generates hydroxyl ions as negative ions in the hole, crushed body of crushed tourmaline, fired body of ceramics mixed with tourmaline powder, crushed body of crushed fired body, synthetic resin Even if heavy metals are dissolved in the rainwater falling on the surface by fitting a filter that selectively accommodates the crushed body obtained by crushing the formed body, hydroxyl ions generated Thus, the dissolved heavy metal can be absorbed and fixed. For this reason, there is no possibility of contaminating the soil in which water has penetrated.

Further, by covering the pipe and the crushed stone layer with a sheet having water permeability, water flowing in the pipe can permeate into the ground through the fired body and the water-permeable sheet from the pipe, and soil and sand can be removed. It does not enter the crushed stone layer and cause clogging.
For this reason, water permeability can be maintained in a favorable state.

Also, by using porcelain raw materials, ceramic raw materials, and sludge incineration ash as ceramic raw materials, various fired bodies can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a schematic configuration of a permeation structure.

FIG. 2 is a diagram illustrating a structure of a joint between a permeation well configured by vertically arranging permeation tubes and a permeation tube arranged horizontally.

FIG. 3 is a cross-sectional view illustrating a structure of a permeation tube portion.

FIG. 4 is a diagram showing a configuration of a filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Penetration pipe 1a, 9a Penetration hole 2 Penetration well 3 Crushed stone layer 4 Water permeable sheet 5 Gutter 6 Filter 7 Filter 7a, 7b Filter frame 8 Fired body 9 Cylindrical pipe 10 Sloping wall pipe 11 Cover 12 Bottom plate

Claims (3)

[Claims] 1. A raw material of tourmaline, a crushed body of crushed tourmaline, and a powder of crushed tourmaline for generating hydroxide ions in a hole through which flowing or stored water flows out into the ground are mixed with a ceramic raw material. Selected from the group consisting of a fired body fired and fired, a crushed body obtained by crushing the fired body, a molded body obtained by mixing powder obtained by crushing tourmaline with a synthetic resin raw material, and a crushed body obtained by crushing the molded body An infiltration structure having an underground structure fitted with a filter containing a rough ore, a crushed body, a fired body, and a formed body, wherein crushed stone is laid around the underground structure. 2. The infiltration structure according to claim 1, wherein the crushed stone laid around the underground structure is covered with a water-permeable sheet having water permeability. 3. The infiltration structure according to claim 1, wherein the ceramic raw material includes a porcelain raw material, a ceramic raw material, and sludge incineration ash.