JPH10110442A - Spring water draining material for basement, water storage tank and underground wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge spring water excellently, and to prevent the penetration of spring water into a basement by constituting the sidewall of an underground structure of a spring draining material consisting of foamed-particle molded forms having a specific shape manufactured by molding cylindrical synthetic-resin foamed particles. SOLUTION: The sidewall of a basement 1 is composed of the spring draining material 2, a waterproof layer 3 and a building frame 4 made of concrete in order from the outside, and a drainage means such as a culvert 6 is installed to the lower section of the spring draining material 2. The spring draining material 2 consists of foamed-particle molded forms being manufactured by molding synthetic-resin foamed particles such as a cylindrical polyolefin resin and having communicated voids, and abounds in compressive strength, water permeability and drainage properties, and bulk density is set in 0.03-0.20g/cm3 , 5% compressive strength in 0.8kg/cm<2> or more, the coefficient of permeability in 1×10<-2> to 4×10<-1> cm/sec and thickness in 25mm or more. Since the spring draining material 2 is difficult to be damaged at the time of the back filling of soil and sand and spring water is dained excellently, water pressure applied to the external wall of the building frame 4 made of concrete can be reduced. The waterproof layer 3 is not damaged and has superior waterproofness, and can improve the waterproofness of the basement extremely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a basement, a water tank,
And spring water drainage material for underground walls.

[0002]

2. Description of the Related Art In a conventional basement, a soft polyvinyl chloride resin is applied to the outer wall (side wall) of the concrete body and the basement in order to prevent spring water in the ground from entering the basement. After attaching a waterproof sheet made of such as or applying a waterproof mortar or a waterproof resin coating agent to provide a waterproof layer to form an underground structure, it is formed by burying earth and sand around the structure. I was However, the conventional basement has a problem that the waterproof layer is easily damaged by pebbles or the like when backfilling the earth and sand, and the waterproof property of the side wall is easily impaired.

[0003] As one of the waterproofing methods for a basement, instead of using a waterproof layer to prevent water from entering, a drainage layer is provided outside the basement outer wall to prevent water pressure from being applied to the outer wall to prevent water from entering. A known method is known. As the drainage layer, in order to positively discharge spring water, for example, the surface of a drainage spacer in which a plate of hard vinyl chloride resin or the like is formed in an uneven shape such as a corrugated plate is covered with a water-permeable member such as a nonwoven fabric. Drainage material is used. By installing this drainage material outside the concrete frame, the water in the soil permeates the nonwoven fabric etc. on the surface of the drainage material, the permeated water flows down the space inside the drainage material, and from the basement floor slab surface below the outer wall It is drained through a culvert provided at a lower position.

The above-mentioned drainage material does not prevent the spring water from entering the outer wall of the skeleton of the basement by the waterproof layer, but reduces the water pressure applied to the outer wall by actively discharging the spring water in the soil. And to prevent spring water from entering the basement. In the basement provided with the drainage material, when the surface of the drainage material is damaged by pebbles or the like when backfilling the earth and sand, the nonwoven fabric on the surface which is a permeable member is broken, and the spring water can be selectively drained from the soil. In this case, there is a problem that the soil is clogged in the drainage material, the drainage is not performed well, and it is difficult to reduce the water pressure applied to the outer wall of the frame, and the waterproofness becomes insufficient. .

[0005] In some cases, a concrete water storage tank is constructed underground. As such a water reservoir, for example, a heat storage tank for storing a heat storage agent such as water for indoor cooling / heating or temperature control of a chemical plant is known. Concrete heat storage tanks cover the inner wall of the tank with a heat insulating material such as a polystyrene resin foam plate, and apply a waterproof mortar or a waterproof resin coating agent on the inner surface of the heat insulating material, or use a soft polyvinyl chloride resin or the like. It is waterproofed by covering it with a waterproof sheet made of water or attaching a waterproof plate made of hard polyvinyl chloride resin or the like. In some cases, an insulating sheet made of polyethylene resin or the like is provided between the waterproof sheet and the polystyrene-based resin foam board in order to prevent migration of the plasticizer in the soft polyvinyl chloride resin.

[0006] However, the above-mentioned conventional heat storage tank is repeatedly subjected to a temperature change due to increase and decrease of hot water in the tank and exchange of hot water and cold water, so that the concrete frame of the heat storage tank is liable to crack. Then, when the underground spring water outside the skeleton enters the insulation through cracks in the skeleton, the insulation drops off from the skeleton due to the pressure of the spring when the water level in the heat storage tank decreases, and the inner surface of the insulation becomes waterproof. The layer may be destroyed, the waterproof sheet may cause unevenness, and furthermore, it may peel off from the heat insulating material, and water may leak from the heat storage tank into the soil, or water in the soil may enter the heat storage tank. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and provides a basement capable of effectively discharging spring water around a concrete outer wall of the basement and preventing intrusion of the spring into the basement. The purpose is to do. Another object of the present invention is to provide a water storage tank having a concrete body buried underground, in which even if a crack occurs in the body, the waterproof sheet does not peel off due to the pressure of spring water or the heat insulating material does not fall off. To provide a tank. Another object of the present invention is to provide a spring drainage material used in the above-mentioned basement or water storage tank.

[0008]

According to the present invention, (1) the side wall of the underground structure is composed of a spring drainage material / waterproof layer / concrete frame in order from the outside, and the spring drainage material is a cylindrical composite. (2) a basement comprising a foamed molded article having continuous voids formed by molding resin foamed particles;
The side wall of the underground structure is a concrete frame /
A water storage tank comprising a spring water drainage material / waterproof layer, wherein the spring water drainage material is formed of a foamed particle molded body having continuous voids formed by molding cylindrical synthetic resin foamed particles;
(3) Bulk density obtained by molding cylindrical synthetic resin foam particles 0.03 to 0.20 g / cm ³ , 5% compressive strength 0.8 k
g / cm ² or more, water permeability 1 × 10 ^-2 to 4 × 10 ^-1 cm
/ Sec, a spring water drainage material made of a molded article of a plate-like expanded particle having a communicating gap having a thickness of 25 mm or more.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a basement 1 according to the present invention has an underground structure buried in the ground in which side walls are formed by molding cylindrical synthetic resin foam particles in order from the outside. It is composed of a spring drainage material 2 made of a foamed particle molded body having voids, a waterproof layer 3, and a concrete frame 4. still,
Although not shown, the waterproof layer 3 and the concrete frame 4 are not shown.
A heat insulating material layer may be provided between the two. As the heat insulating material, a material made of a polystyrene resin foam is preferable because of its excellent heat insulating property, water resistance, compressive strength and the like. The waterproof layer 3 may be provided with a waterproof sheet after the concrete body 4 is cast, a waterproof mortar or a waterproof resin coating agent may be applied, or the waterproof sheet may be attached in advance to the concrete before casting the concrete. And put concrete in
It may be integrated with the concrete body 4 or may be any.

Below the spring water drainage material 2, drainage means such as a culvert 6 is provided.

The spring water drainage material 2 is a foamed molded article having continuous voids formed by molding cylindrical synthetic resin foam particles in a mold, and therefore has excellent compressive strength and water resistance and has continuous voids. It has excellent water permeability. Therefore, after the spring drainage material 2 is provided and the underground structure of the basement 1 is formed, when backfilling the soil, pebbles and the like in the soil cause the spring drainage material 2
Even if the surface is damaged, there is no risk that the water permeable member will break and the spring water cannot be selectively discharged, unlike the conventional spring water drainage material provided with a water permeable member such as a nonwoven fabric on the surface. Is discharged, and the water pressure on the concrete building outer wall can be reduced.

Further, in the basement of the present invention, a waterproof layer is provided between the spring drainage material and the outer wall of the concrete frame, and the waterproof layer is covered with the spring drainage material to bury soil. Since there is no danger of being damaged by pebbles or the like when returning, the basement according to the present invention can be made extremely waterproof. In addition,
The water in the soil passes through the inside of the spring drainage material and is discharged into a culvert provided below.

The spring drainage material 2 preferably has a bulk density of 0.03 to 0.2 g / cm ³ within the range of 0.03 to 0.2 g / cm ³ , since a molded body having good physical properties can be obtained. If the bulk density is less than 0.03 g / cm ³ , the compression strength of the molded body tends to be low, and if it exceeds 0.2 g / cm ³ , poor fusion tends to occur during molding. Since the foamed foam is subjected to the pressure of earth and sand and spring water at the time of use, it is less likely that the 5% compressive strength is 0.8 kg / cm ² or more, which deforms the pores, narrows the voids and impairs the water permeability. preferable. In order to reliably discharge spring water, JIS
Permeability coefficient based on A1218 is 1 × 10 ^-2 to 4 ×
The thickness is preferably 10 ^-1 cm / sec, more preferably 1 × 10 ^{-2 to} 9 × 10 ^-2 , and a thickness of 25 mm or more is preferable because of excellent drainage. still,
The bulk density of the foamed molded article is a value obtained by dividing the weight of the molded article by the external dimensions.

The base resin of the synthetic resin expanded particles used for the expanded particle molded article may be any of a polyolefin resin, a polystyrene resin, and other thermoplastic resins, but a polyolefin resin is preferable. Examples of the polyolefin resin include an ethylene-butene random copolymer, an ethylene-butene block copolymer, and an ethylene-butene block copolymer.
Propylene resin such as propylene block copolymer, ethylene-propylene random copolymer, ethylene-propylene-butene terpolymer, polypropylene homopolymer, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, linear super Polyethylene resins such as low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, ionomer resin in which ethylene-methacrylic acid copolymer is cross-linked with metal ions, ethylene-acrylic acid-maleic anhydride terpolymer, etc. Is mentioned. The polyolefin-based resin may be used in a non-crosslinked state, or may be used after being crosslinked by peroxide or radiation.

Among the above-mentioned base resins, particularly preferred are ethylene-propylene random copolymer, propylene-butene random copolymer, ethylene-butene-
An excellent molded product having a 5% compressive strength of 0.8 kg / cm ² or more can be easily obtained.

The foamed molded article is formed by so-called bead molding in which cylindrical synthetic resin foamed particles are filled in a mold and heated to fuse and integrate the particles. Preferred shapes of the expanded particles are shown in FIGS. These expanded particles 2
0 is a cylindrical foamed particle 11 having a hollow structure as a whole and the hollow portion penetrating the foamed particle, d
_MIN is 1.5 mm or more and the value of d _MIN / D _MIN is 0.
25 to 0.85 (where d _MIN is the smallest pore diameter in a cross section perpendicular to the direction of the pores of the cylindrical foamed particles, and D _MIN is the smallest outer diameter of the cross section from which d _MIN was obtained). ) Is preferred.

The specific shape of the expanded particles is shown in FIG.
As shown in (b), the hole diameter d and the outer diameter D are constant, as shown in FIG. 3 (a) to 3 (c), although the hole diameter d and the outer diameter D are not constant and have a very small portion as shown in FIG. Combinations and the like are mentioned. In addition, the outer shape of the above-mentioned tubular expanded particles is not limited to a cylindrical tube, and may be any of an elliptical tube and a polygonal tube. .

The foamed particles have a pore diameter d _MIN of 1.5 mm
By using those having a value of d _MIN / D _MIN of 0.25 to 0.85, a continuous space having a small space with a small shrinkage and a good fusion property and excellent physical properties The molded article of synthetic resin expanded particles having the following formula can be easily obtained.

When the pore diameter d _{MIN of the} expanded particles is less than 1.5 mm, or when d _MIN / D _MIN is less than 0.25, sufficient voids are formed in the molded article obtained by integral molding by heating with a mold. Therefore, there is a possibility that the water permeability may be insufficient and the water permeability may be insufficient. When d _MIN / D _MIN exceeds 0.85, it is difficult to produce the foamed particles themselves, and the molded body obtained by integrally molding the particles by heating in a mold has sufficient fusion of the foamed particles. In addition, the molded product shrinks due to insufficient strength of the expanded particles, etc., resulting in insufficient dimensional stability, or the expanded particles are deformed and the communicating voids cannot be sufficiently secured. There is a risk of becoming.

When the foamed particles are formed in the cylindrical shape as described above, the position of the air outlet relative to the inlet of the filling air when filling the foamed particles into the mold by air transport is adjusted. Thus, the cylindrical foamed particles can be given a certain degree of directionality and can be filled in the mold, and the porosity of the foamed molded article and the directionality of the connected voids can be controlled.

The above foamed particles are extruded, for example, into a strand having a cross-sectional shape substantially similar to the cross-sectional shape of the desired foamed particles after melt-kneading the base resin with an extruder, and cut into appropriate lengths after cooling. Or, first, pellets of non-foamed cylindrical resin particles are produced by means such as cutting to an appropriate length and cooling, and the resin particles are dispersed in a dispersion medium in the presence of a foaming agent in a closed container. The resin particles are heated to a temperature not lower than the softening temperature to impregnate the resin particles with the foaming agent, and then the container is once opened, and the pressure in the container is maintained at a pressure equal to or higher than the vapor pressure of the foaming agent. It is obtained by simultaneously releasing the particles and the dispersion medium under a lower pressure atmosphere than the inside of the container (usually under atmospheric pressure) to foam the resin particles.

As the waterproof layer 3, a waterproof sheet made of a soft vinyl chloride resin sheet or the like, a waterproof mortar, a waterproof resin coating agent, or the like is used.

FIG. 2 shows an example of the water storage tank of the present invention, and is a longitudinal sectional view of a main part of a heat storage layer. As shown in FIG. 2, the water tank of the present invention includes a concrete body 14 and a foamed particle molded body having continuous voids formed by molding cylindrical synthetic resin foamed particles in order from the outer side wall of the underground structure. Spring water drainage material 1
2. It is composed of a waterproof layer 13. Thermal storage tank 1
In the case of using the spring water drainage material 12 and the waterproof layer 1,
3, a heat insulating material 15 is provided.

The water storage tank is provided with a pit 7 below the tank, and the water permeating the spring drainage material 12 is discharged to the pit 7.

The spring drainage material 12 is a concrete skeleton 14.
After forming, may be attached to the inside of the frame,
In the heat storage layer, when forming the frame 14, a heat insulating material and a spring water drainage material may be attached to a frame inside the tank, and concrete may be poured into the frame to be integrally formed with the frame. it can. In the latter case, the spring drainage material 12
The concrete skeleton 14 and spring water drainage 1
2 is firmly formed.

When a heat storage tank is divided into a plurality of sections and there is a side wall which does not have a risk of contact with spring water, it is not necessary to provide a spring drainage material on the side wall.

As the spring drainage material 12, the same material as the spring drainage material 2 exemplified in the description of the basement shown in FIG. 1 is used. Examples of the heat insulating material provided when used as a heat storage tank include a polystyrene-based resin foam and a polyurethane-based resin foam, and a polystyrene-based resin foam is particularly preferable because of its excellent heat insulating properties and low water absorption. As the waterproof layer, when there is no heat insulating material layer, a hard waterproof plate such as a hard vinyl chloride resin plate or a waterproof sheet such as a soft vinyl chloride resin sheet can be used. Can be In the case of having a heat insulating material layer made of a polystyrene-based resin foam or the like, in addition to attaching the above-described waterproof plate or waterproof sheet, the waterproof layer is formed by applying a waterproof mortar or a waterproof resin coating agent to the inside surface of the insulating material tank. Can also be formed.

[0028]

As described above, the basement according to the present invention has a spring wall drainage material / waterproof made of a foamed particle molded body having open pores formed by molding cylindrical synthetic resin foamed particles in order from the outer side wall. The following effects are obtained by adopting the structure composed of the layer / concrete body. The spring drainage material is less likely to be damaged during backfilling of earth and sand, and the spring water is discharged well, so that the water pressure applied to the outer wall of the concrete frame can be reduced. Furthermore, the waterproof layer provided between the spring drainage material and the concrete body has no risk of being damaged, and thus has excellent waterproof properties. Therefore, the basement of the present invention can be made extremely waterproof. In addition, since the spring water is well drained, the ground around the basement of the present invention can be prevented from softening or freezing.

The water storage tank of the present invention has a side wall in order from the outside, a concrete body / spring water drainage material formed of a foamed particle molded body having continuous voids formed by molding a cylindrical synthetic resin /
By adopting a structure consisting of a waterproof layer, when cracks occur in the concrete skeleton, the intruding spring water is discharged out of the tank through the spring drainage material, so it is used for the waterproof layer by the pressure of the spring water. The waterproof sheet is not peeled off, and the waterproof resin coat is not destroyed, so that it is possible to prevent the spring water in the soil from entering the inside of the water tank and the water in the water tank from leaking to the outside. Further, in the case of a heat storage tank provided with a heat insulating material between the spring drainage material and the waterproof layer, the heat insulating material can prevent the heat insulating material from falling off from the frame due to the pressure of the spring water.

The spring drainage material of the present invention has a bulk density of 0.03 to 0.20 g / cm obtained by molding cylindrical synthetic resin foam particles.
³ , 5% compressive strength 0.8 kg / cm ² or more, water permeability 1
Since it is made of a molded article of flat foamed particles having × 10 ^-2 to 4 × 10 ^-1 cm / sec and having a thickness of 25 mm or more and having communicating pores, it has excellent compressive strength, water resistance and water permeability, and water permeability even if the surface is damaged. Spring water can be reliably discharged because the water quality is not impaired.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a main part of an example of a basement according to the present invention.

FIG. 2 shows an example of a water storage tank of the present invention, and is a longitudinal sectional view of a main part of a heat storage tank.

FIG. 3 is a perspective view showing an embodiment of tubular expanded particles used for the spring drainage material of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 basement room 2 spring water drainage material formed of foamed particle molded body having void 3 waterproof layer 4 concrete body 11 water storage tank 12 spring water drainage material formed of foamed particle molded body having void 13 waterproof layer 14 concrete body

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masahiro Hashiba 24-5 Terrace House Tanaka A, Daikancho 24-5, Hiratsuka-shi, Kanagawa

Claims (3)

[Claims] 1. A side wall of an underground structure comprising a spring drainage material / waterproofing layer / concrete frame in order from the outside, wherein said spring drainage material is formed by molding cylindrical synthetic resin foam particles. A basement comprising a foamed molded article having: 2. A side wall of an underground structure is composed of a concrete frame / spring material / waterproofing layer in order from the outside, and said springing / water drainage material is formed by molding cylindrical synthetic resin foam particles. A water tank comprising a foamed particle molded article having the following. 3. A bulk density of 0.03 to 0.20 g / cm ³ , a 5% compressive strength of 0.8 kg / cm ² or more, and a water permeability of 1 × 10 ^-2 or more, obtained by molding cylindrical synthetic resin foam particles. 4x1
A spring water drainage material comprising a flat foamed particle molded article having a communication gap of 0 ^-1 cm / sec and a thickness of 25 mm or more.