JP6901296B2 - Piping structure, building, and plumbing installation method - Google Patents

Description

The present invention relates to a piping structure, a building, and a piping installation method.

A sheath pipe is installed so as to communicate with the foundation of the building between the horizontal part located on the indoor side and the vertical part located on the outdoor side that is buried in the ground. , A piping structure is known in which an inner pipe is passed between the inside and outside of a building using this sheath pipe (see, for example, Patent Documents 1 to 4).

According to this structure, the inner pipe can be easily inserted and pulled out through the sheath pipe, so that the inner pipe can be easily installed and the inner pipe can be repaired without breaking the foundation. Is possible. Therefore, the life of the building can be extended.

Japanese Unexamined Patent Publication No. 2008-150888 Japanese Unexamined Patent Publication No. 2011-269945 Japanese Unexamined Patent Publication No. 2012-233401 Japanese Unexamined Patent Publication No. 2013-227851

In recent years, as a next-generation energy-saving standard, it has been required to improve the heat insulating performance of the foundation of a building. However, the piping structure penetrating the foundation could not meet the next-generation energy-saving standards if it remained as described in each of the above patent documents.
When installing a heat insulating material around the pipe structure that penetrates the foundation to meet the next-generation energy saving standards, a gap is provided between the circumference of the pipe structure and the heat insulating material, and an on-site foamed heat insulating material containing an anti-termite chemical is added. However, if the heat insulating material is made thicker in order to further improve the heat insulating performance, the circumference of the piping structure and the heat insulating material will be increased as the thickness of the heat insulating material increases. Due to the high height of the gap between them, the in-situ foam insulation containing anti-termite chemicals does not reach the surface of the foundation, leaving a gap between the piping that penetrates the foundation and the insulation, and this gap causes the foundation. There was a risk that white ants that invaded from the piping structure that penetrated the insulation would form ant paths inside the heat insulating material and reach the structural frame such as floors and pillars.
In addition, on-site foam insulation containing termiticide is expensive, and as the thickness of the insulation increases and the height of the gap between the circumference of the piping structure and the insulation increases, the amount used increases. Therefore, the cost will increase further.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe structure, a building, and a pipe installation method capable of satisfying next-generation energy saving standards at low cost.

In order to solve the above problems, the piping structure of the present invention is provided between a horizontal portion located on the indoor side and a vertical portion located on the outdoor side in the foundation of a building, which is buried in the ground. In a piping structure including a sheath pipe installed so as to communicate with each other and an inner pipe that is passed between the inside and outside of the building using the sheath pipe, at least a portion of the lateral surface of the foundation near the outside. A heat insulating layer is provided so as to cover the heat insulating layer, and the heat insulating layer is composed of a heat insulating material arranged so as to surround the sheath pipe and the inner pipe, and the heat insulating material is a resin containing no plasticizer. It is characterized by being formed of a foam.

With this configuration, a sheath pipe is installed in the foundation so as to communicate between the horizontal surface portion located on the indoor side and the vertical surface portion located on the outdoor side in the foundation of the building and buried in the ground. , The piping structure can be constructed by passing the inner pipe between the inside and outside of the building using this sheath pipe. This makes it possible to easily insert and remove the inner pipe through the sheath pipe, so that the inner pipe can be easily installed and the inner pipe can be repaired or renewed without damaging the foundation. Is possible. Therefore, the life of the building can be extended.
In addition, a heat insulating layer was formed so as to cover at least the outdoor portion of the lateral surface of the foundation. By realizing such a heat insulating structure, the heat insulating performance of the foundation of the building can be improved and the next-generation energy saving standard can be satisfied.
Further, the heat insulating layer was composed of a heat insulating material formed of a resin foam containing no plasticizer. That is, since the heat insulating layer is composed of a plate-shaped resin foam, the heat insulating layer can be constructed only by arranging the heat insulating material at a desired position. In other words, the heat insulating layer can be constructed without any trouble in construction.

Further, the piping structure of the present invention is characterized in that the heat insulating material is provided so as to come into contact with the outer peripheral surface of the inner pipe that rises so as to protrude from the lateral surface portion.

With this configuration, since the heat insulating material does not contain a plasticizer, it is possible to prevent deterioration of the inner pipe even if it is brought into contact with the inner pipe. Therefore, since the inner pipe and the heat insulating material can be arranged without a gap, the desired heat insulating performance can be easily and surely secured.
Further, since the resin foam containing no plasticizer is used as the heat insulating material, even if the inner pipe is made of a hard vinyl chloride pipe or the like, the heat insulating material can be installed in contact with the inner pipe. That is, since the heat insulating structure can be realized without using the foamable heat insulating material, it is possible to prevent the heat insulating material from being damaged due to the foaming heat insulating material not reaching the gap, and the construction is simplified. This can lead to a reduction in construction costs.

Further, the piping structure of the present invention is characterized in that the inner pipe is a resin pipe.

With this configuration, it is possible to install the pipe in contact with the heat insulating material even if a general resin pipe is used without using a steel pipe or a special pipe. As a result, a desired piping structure and heat insulating structure can be realized with a simple configuration.

Further, in the piping structure of the present invention, an anti-termite member is provided at the boundary between the heat insulating material and the lateral surface portion, and the anti-termite member is at least the outer peripheral surface of the inner pipe and the outer peripheral surface of the sheath pipe. It is characterized in that it is provided so as to cover the space between them.

With this configuration, an anti-termite member is provided at the boundary between the heat insulating material and the lateral surface portion, and the anti-termite member is provided so as to cover at least between the outer peripheral surface of the inner pipe and the outer peripheral surface of the sheath pipe. As a result, even when a continuous heat insulating layer is provided on the lateral surface of the foundation, it is possible to provide anti-termite performance to a portion through which the inner pipe is passed between the inside and outside of the building by using the sheath pipe.

Further, the building of the present invention is characterized by having any of the above piping structures.

With such a configuration, it is possible to provide a building in which the effects of the above-mentioned piping structure can be obtained. In addition, it is possible to provide a building that meets the next-generation energy conservation standards.

Further, the pipe installation method of the present invention is based on a state in which a sheath pipe is embedded so as to communicate between a horizontal surface portion located on the indoor side and a vertical surface portion located on the outdoor side so as to communicate with each other. Between the sheath pipe burying step of placing the sheath pipe, the inner pipe installation step of penetrating the inner pipe between the inside and the outside of the building through the sheath pipe, and the outer peripheral surface of the inner pipe and the outer peripheral surface of the sheath pipe. The anti-termite member installation step of providing the anti-termite member so as to cover the above, and the heat insulating material are laid so as to cover at least the outdoor side portion of the lateral surface portion of the foundation, and the above-mentioned stand up so as to protrude from the lateral surface portion. It is characterized by a heat insulating material laying step of laying the inner pipe so as to be in contact with the outer peripheral surface of the inner pipe, and forming a heat insulating layer on the lateral surface of the sheath pipe and the foundation on which the inner pipe is installed.

With such a configuration, it is possible to provide a pipe installation method capable of obtaining the effects of the above-mentioned pipe structure. In addition, it is possible to provide a piping installation method that meets the next-generation energy saving standards.

According to the present invention, it is possible to provide a pipe structure, a building, and a pipe installation method capable of satisfying the next-generation energy saving standard at low cost even for a portion of the pipe structure penetrating the foundation.

It is a partial vertical sectional view of the foundation provided with the piping structure of this embodiment. It is a figure which shows the continuous insulation layer covering the whole building. It is a partial perspective view which shows the heat insulation layer of a foundation part. It is a process diagram (sheath pipe burying process and inner pipe installation process) of the pipe installation method in the case of FIG. 2, (a) is a vertical sectional view, and (b) is a plan view. It is a process diagram (ant-proof member installation process) of the pipe installation method in the case of FIG. 2, (a) is a vertical sectional view, and (b) is a plan view. It is a process diagram (insulation material laying process) of the pipe installation method in the case of FIG. 2, (a) is a vertical sectional view, and (b) is a plan view. It is an enlarged cross-sectional view of part A of FIG. It is a partial vertical cross-sectional view of the foundation which shows the termite prevention structure (termite invasion prevention part, etc.) in this embodiment. It is a partial vertical sectional view of the foundation which shows the modification of FIG. It is a partial vertical sectional view of the foundation which shows another modification of FIG. It is a partial vertical sectional view of the foundation which shows the piping structure when the merging part (drainage header) is provided away from a sheath pipe. It is a partial vertical sectional view of the foundation which shows the piping structure provided with the merging part (the merging basin).

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 to 12 are for explaining the present embodiment.

As shown in FIGS. 1 and 7, with respect to the foundation 2 of the building 1, the horizontal surface portion 3 located on the indoor side and the vertical surface portion 4 a located on the outdoor side are buried in the ground. A piping structure 7 is adopted in which a sheath pipe 5 is installed so as to communicate with each other, and the inner pipe 6 is passed between the inside and outside of the building 1 by using the sheath pipe 5.

Here, the foundation 2 is a solid foundation. The side surface portion 3 is a bottom plate portion of a solid foundation. Further, the vertical surface portion 4 is a side surface of a rising portion of the foundation 2 and a rooting portion located below the rising portion. The foundation 2 is a solid foundation, but a cloth foundation or the like may be used instead of the solid foundation.

In the piping structure 7 of the present embodiment, the sheath pipe 5 and the inner pipe 6 are members having a plurality of members (first sheath pipe portion 5c and second sheath pipe portion 5d, bent inner pipe portion 6b, first inner pipe portion 6c, and first inner pipe portion 6c, respectively. (Ii) It is composed of a combination of inner pipe portions (6d, etc.). In FIG. 1, the sheath tube 5 is embedded so that the central axis on the lower end side of the tube constituting the sheath tube 5 is substantially perpendicular to the vertical surface portion 4 of the foundation 2, and also constitutes the sheath tube 5. The central axis on the upper end side of the pipe is embedded so as to be substantially perpendicular to the lateral surface portion 3 of the foundation 2.
Although it is assumed that the sheath tube 5 is composed of a plurality of members, the sheath tube 5 may be composed of a single member in which these components are integrated by injection molding or blow molding. Further, although the angle formed by the central axis on the upper end side of the tube constituting the sheath tube 5 and the central axis on the lower end side is substantially a right angle, the central axis and the lower end side on the upper end side of the tube constituting the sheath tube 5 are substantially perpendicular to each other. The angle formed by the central axis of the sheath tube 5 may be an acute angle. In this case, the central axis on the lower end side of the tube constituting the sheath tube 5 is substantially perpendicular to the vertical surface portion 4 of the foundation 2, while the sheath tube 5 is formed. The angle formed by the central axis on the upper end side of the pipe constituting the above and the lateral surface portion 3 of the foundation 2 is configured to be an acute angle.

An indoor pipe 8 is connected to the indoor side of the inner pipe 6. Further, an outdoor pipe 9 is connected to the outdoor side of the inner pipe 6. Such a piping structure 7 is used in, for example, a water supply pipe or a drainage pipe.
Here, as the material of the inner pipe 6, for example, a polybuden pipe or a cross-linked polyethylene pipe is adopted in the case of a water supply pipe, and a hard PVC pipe is adopted in the case of a drain pipe.

The piping structure 7 of the present embodiment is provided with the following configuration (insulation structure) with respect to the basic or overall configuration as described above.

First, the heat insulating layer 11 is arranged so as to cover at least a portion closer to the outside of the lateral surface portion 3 of the foundation 2.

Here, the next-generation energy saving standard is to form a continuous heat insulating layer 11 having no heat insulating defect so as to cover the entire building 1 as shown in FIG. 2, and as shown in FIG. 3, the foundation 2 is formed. It is included that the heat insulating layer 11 is provided so as to cover at least a portion of the lateral surface portion 3 closer to the outside and an inner surface of a rising portion (upper part of the vertical surface portion 4) of the foundation 2. The heat insulating material 13 installed on the horizontal surface portion 3 of the foundation 2 is preferably installed at a distance of at least 300 mm or more from the vertical surface portion 4 of the foundation 2, and more preferably 450 mm or more. In this case, the width of the heat insulating material 13 installed along the horizontal plane of the lateral surface portion 3 of the foundation 2 is preferably 300 mm or more, more preferably 450 mm or more. Further, the width of the heat insulating material 13 installed along the horizontal plane of the horizontal surface portion 3 of the foundation 2 is preferably 1000 mm or less, more preferably 900 mm or less.
At this time, the width of the heat insulating material 13 installed on the horizontal surface portion 3 of the foundation 2 refers to the distance from the inner surface of the vertical surface portion 4 of the foundation 2. That is, the total length of the heat insulating material 13 installed on the vertical surface portion 4 of the foundation 2 and the width of the heat insulating material 13 installed along the horizontal plane of the horizontal surface portion 3 of the foundation 2 is at least 300 mm or more and 1000 mm or less. It is preferably 450 mm or more and 900 mm or less.

Further, when the heat insulating material 13 is installed on the vertical surface portion 4 and the horizontal surface portion 3 in order to secure the heat insulating performance in the underfloor space (pit) in this way, the ventilation port for ventilating the underfloor space is not provided. In other words, the underfloor space is configured as a somewhat closed space without ventilation openings.

The heat insulating material 13 used in the present embodiment is made of a resin foam containing no plasticizer. The heat insulating material 13 is made of a resin foam that does not contain a phthalate ester among the plasticizers. Regarding whether or not the heat insulating material 13 contains a phthalate ester, it is confirmed by the following method whether or not the phenol resin foam of the phenol resin foam laminate contains a phthalate compound. You can judge.

(Confirmation method)
1 g of a sample collected from the phenol resin foam portion of the phenol resin foam laminate is crushed, and Soxhlet extraction is performed with methanol (150 mL) (7 hours). Subsequently, after concentrating and drying at 40 ° C. with an evaporator, vacuum drying (normal temperature, 30 minutes) is performed. Then, after measuring the dry mass, it is dissolved in 5 mL of methanol, and gas chromatography / mass spectrometry (GC / MS) measurement is performed. The conditions for GC / MS measurement were as follows.
GC device: Agilent Technologies 7890A
Injection port temperature: 320 ° C
Column: DB-1MS (30 m x 0.25 mmφ), liquid phase thickness 0.25 μm
Column temperature: 40 ° C (hold for 5 minutes), temperature rise at 20 ° C / min, 320 ° C (hold for 11 minutes)
MS device: Agilent Technologies 5975C MSD
Ion source temperature: 230 ° C
Interface temperature: 300 ° C
Ionization method: Electron ionization method If the phthalate compound is not measured by analysis by this method, it may be judged that the phthalate ester is substantially not contained.

The heat insulating material 13 of the present embodiment is a resin foam containing no plasticizer, and is installed so as to abut on the outer peripheral surface 6a of the inner pipe 6. That is, although the inner pipe 6 is arranged so as to rise from the surface of the lateral surface portion 3, the heat insulating material 13 is partially cut off along the outer peripheral surface 6a of the inner pipe 6 at the relevant portion, and the heat insulating material 13 is laterally cut. It is installed so as to come into contact with the surface of the surface portion 3. The heat insulating material 13 installed on the side surface portion 3 may be substantially free of a plasticizer, and may be composed of a thermosetting resin foam or a thermoplastic resin foam.

As the heat insulating material 13 arranged on the vertical surface portion 4 of the foundation 2, the same material as the heat insulating material 13 arranged on the horizontal surface portion 3 is attached. The heat insulating material 13 arranged on the vertical surface portion 4 may be made of a material different from that of the heat insulating material 13 arranged on the horizontal surface portion 3, for example, styrene foam (by the bead method or the extrusion method) or the like. A foamed plastic heat insulating board made of hard urethane foam, hard isocyanurate foam, phenol foam, or the like may be used. In particular, among these, phenol foam has the highest heat insulating performance, and the thinnest thickness is sufficient to exhibit the required heat insulating performance, so that the heat insulating material 13 can be easily installed so as not to interfere with the horizontal indoor pipe 8. , Phenol foam is preferably used.

The thickness of the heat insulating material 13 installed on the vertical surface portion 4 is formed to be the same as or thicker than the thickness of the heat insulating material 13 installed on the horizontal surface portion 3. In improving the heat insulating property of the foundation 2, the heat insulating material 13 installed on the vertical surface portion 4 of the foundation 2 in contact with the outside air contributes more significantly, so it is more effective to thicken the heat insulating material 13 installed on the vertical surface portion 4. Is. On the other hand, the heat insulating material 13 installed on the lateral surface portion 3 should be as thin as possible from the viewpoint of securing a large underfloor space (pit).

As the thickness of the heat insulating material 13 installed on the lateral surface portion 3 of the foundation 2, for example, one having a thickness of about 20 mm or more and about 200 mm can be used, preferably 35 mm or more and 150 mm or less, and more preferably 45 mm or more and 100 mm or less. However, the thickness of the heat insulating material 13 installed on the horizontal surface portion 3 of the foundation 2 is not limited to the above, and for example, the same thickness as the heat insulating material 13 installed on the vertical surface portion 4 of the foundation 2 is adopted. You may.
Further, the thermal resistance of the heat insulating material 13 installed on the side surface portion 3 ^{is preferably 0.7 m 2} · K / W or more, more preferably 1.0 m ² · K / W or more, and 2.0 m ² · K / W or more. Is the most preferable. Thermal resistance is measured by the flat plate heat flow meter method of JIS A 1412-2.
Further, the water absorption amount of the heat insulating material 13 installed on the lateral surface portion 3 is 4.0 g / 100 cm ² or less because it comes into direct contact with the foundation 2, preferably 3.0 g / 100 cm ² or less, more preferably. It is preferable that 2.0 g / 100 cm ² or less is adopted. The amount of water absorption is measured according to JIS A9521.

Further, as shown in FIG. 7, an anti-termite member 30 is arranged at the boundary between the lateral surface portion 3 of the foundation 2 and the heat insulating material 13. The ant-proof member 30 is viewed in a plan view (when the lateral surface portion 3 of the foundation 2 is viewed from the upper floor surface) so as to bridge between the outer peripheral surface 6a of the inner pipe 6 and the outer peripheral surface 5a of the sheath pipe 5. It is provided so as to cover the gap between the inner pipe 6 and the sheath pipe 5 and the gap between the sheath pipe 5 and the lateral surface portion 3. In other words, when viewed in a plan view, there is no outer edge of the anti-termite member 30 inside the outer edge of the sheath tube 5, and there is no inner edge of the anti-termite member 30 between the sheath tube 5 and the inner tube 6. The anti-termite member 30 may be formed in a sheet shape or a seal shape, and may be formed in a packing-like shape.

The shape of the ant-proof member 30 when viewed in a plan view is not particularly limited, but the outer edge when viewed in a plan view is circular or quadrangular, and a through hole for penetrating the inner pipe 6 is provided at the center. The through hole may be formed by an inner edge smaller than the outer edge of the inner tube 6 when viewed in a plan view. Further, the anti-termite member 30 is two members, a sheet-shaped first anti-termite member that covers the periphery of the sheath tube 5 and a second anti-termite member that covers the gap between the sheath tube 5 and the inner tube 6. It may be composed of.
The ant-proof member 30 is in contact with the heat insulating material 13, but if the ant-proof member 30 is provided at least around the sheath tube 5 and between the sheath tube 5 and the inner tube 6 without a gap. The anti-termite member 30 and the heat insulating material 13 may not be in contact with each other. For example, concrete constituting the lateral surface portion 3 of the foundation 2 may be present between the heat insulating material 13 and the anti-termite member 30.

Further, as shown in FIG. 9, the ant-proof member 30 may be provided so as to project toward the inside of the foundation 2 at the boundary portion between the lateral surface portion 3 of the foundation 2 and the heat insulating material 13. In this case, when the sheath pipe 5 is embedded in the foundation 2, it is preferable to provide the ant-proof member 30 so as to hang from the outer peripheral surface 5a of the sheath pipe 5 to the inner peripheral surface side in advance. Further, after the inner pipe 6 is arranged in the sheath pipe 5, the ant-proof member 30 may be arranged so as to fill the gap between the inner pipe 6 and the sheath pipe 5. The ant-proof member 30 at this time may also be formed in a sheet shape or a seal shape, and may be formed in a packing-like shape.

That is, since there are two paths for termites (so-called ant paths) around the sheath tube 5 penetrating the foundation 2, the outside of the sheath tube 5 and the inside of the sheath tube 5, the termite-proof member 30 has each path. Is arranged near the surface of the lateral surface portion 3 so as to close the surface.
By installing the termite-proof member 30 in this way, termites can be prevented from entering between the piping structure 7 and the heat insulating material 13 without using an on-site foamed heat insulating material containing a termite-proofing agent, and the termite-proofing agent can be used. It is possible to provide the plate-shaped heat insulating material 13 in close proximity to the piping structure 7 without using the compounded on-site foamed heat insulating material.

An anti-termite agent is mixed in the anti-termite member 30. The termite-preventing agent may be any component that termites dislike, such as an inorganic compound type such as boric acid, an organic chlorine type, a carbamate type, an organic phosphorus type, a synthetic pyreth type, and a neonicotinoid type.

As shown in FIGS. 8 and 9, in addition to the anti-termite member 30, an anti-termite tape 24A is attached to the gap between the foundation 2 and the sheath tube 5 to be used as an outer anti-termite material, or a sheath tube. An anti-termite tape 24B may be attached to the gap between the inner pipe 5 and the inner pipe 6, or an anti-termite packing 25 may be fitted between the sheath pipe 5 and the inner pipe 6 near the through hole on the outdoor side of the foundation 2. It may be configured as an internal ant-proof material.

The anti-termite tape 24 (24A, 24B) is, for example, an adhesive plastic product obtained by forming a rubber-based material such as butyl rubber containing a trace amount of anti-termite agent into a tape shape and forming an adhesive layer on one side or both sides thereof. As the hydration reaction of ready-mixed concrete progresses, the anti-termite tape 24 adheres to ready-mixed concrete (surface) by the active group of butyl rubber undergoing an ionic reaction with metal oxide ions in cement and chemically bonding. It has the property of fusing (tissues).

The anti-termite packing 25 is, for example, a sealing material in which a rubber-based material such as butyl rubber containing a trace amount of anti-termite agent is formed into a ring shape. The same as the anti-termite tape 24 and the anti-termite packing 25 may be used as the anti-termite member 30.

Further, as shown in FIG. 10, the termite invasion prevention portion 29 is formed by filling the gap between the sheath tube 5 and the inner tube 6 with an anti-termite material such as particulate or small pieces of glass or cholemanite. You may. At this time, in order to prevent termites from invading from the outer peripheral surface 5a of the sheath tube 5 in which the termite invasion prevention portion 29 is fitted, the termite prevention member 30 is formed by the outer peripheral surface 5a of the sheath tube 5 in a plan view. It is installed so that it has an outer peripheral edge that is larger than the peripheral edge. Further, a transparent shatterproof lid can be attached to the upper surface of the termite intrusion prevention portion 29. Alternatively, the termite-proof material of the termite intrusion prevention unit 29 can be solidified with a transparent solidifying material or the like. A heat insulating material 13 is installed above the termite intrusion prevention unit 29. However, in the case of the present embodiment, since the anti-termite member 30 performs the same function as the anti-scattering lid and the solidifying material, it is not necessary to provide the anti-scattering lid and the solidifying material.

As shown in FIG. 11, the fluid confluence portion 31 may be provided in the upstream portion of the inner pipe 6 with respect to the inner pipe 6. Here, the fluid is, for example, drainage. The merging portion 31 is, for example, a drainage header or a merging basin for collecting drainage from various drainage facilities provided in the building 1 at one place.

When there is not enough height to create a drainage gradient between the floor surface (FL) and the side surface portion 3 of the foundation 2, or due to the positional relationship with the drainage facility and foundation structure, the confluence portion 31 is used as the foundation. When it cannot be installed in the vicinity of 2, the indoor pipe 8 is connected to the inner pipe 6 at a position higher than the lateral surface portion 3 of the foundation 2, and the merging portion 31 is installed in the middle of the indoor pipe 8. In the present embodiment, since the heat insulating material 13 is provided on the lateral surface portion 3 of the foundation 2, it is assumed that the heat insulating material does not need to be provided on the back surface of the floor surface FL. Then, since the merging portion 31 can be installed at a height directly below the floor surface FL of the building 1, even if the merging portion 31 is installed inside the building 1 away from the position of the inner pipe 6, the indoor piping It is possible to secure the drainage gradient required for 8.

Further, in FIG. 12, the merging portion 32 (merging basin) is installed directly above the inner pipe 6 and at a position above the heat insulating material 13 installed on the lateral surface portion 3 of the foundation 2. In this case, unlike FIG. 11, it is not necessary to consider the drainage gradient between the merging portion 32 and the indoor pipe 8, so that the merging portion 32 and the heat insulating material 13 may be installed so as not to interfere with each other.

Then, the above-mentioned piping structure 7 (and heat insulating structure) is provided in the building 1.
Hereinafter, a method of installing the above-mentioned piping structure 7 (pipe installation method) will be described.
First, as shown in FIG. 4, the sheath pipe 5 is embedded so as to communicate between the horizontal surface portion 3 located on the indoor side and the portion 4a buried in the ground of the vertical surface portion 4 located on the outdoor side. In this state, the sheath pipe burying step of placing the foundation 2 is performed.
Subsequently, an inner pipe installation step of penetrating the inner pipe 6 between the inside and the outside of the building 1 through the sheath pipe 5 is performed. The sheath pipe burying step and the inner pipe setting step may be performed substantially at the same time.

Subsequently, as shown in FIG. 5, the inner pipe 6 is arranged so as to protrude from the lateral surface portion 3 of the foundation 2, but between the outer peripheral surface 6a of the inner pipe 6 and the outer peripheral surface 5a of the sheath pipe 5. An anti-termite member installation step of installing the anti-termite member 30 so as to cover it is performed.

After that, as shown in FIG. 6, the heat insulating material 13 is laid so as to cover at least the outdoor side portion of the vertical surface portion 4 and the horizontal surface portion 3 of the foundation 2, and is in contact with the outer peripheral surface 6a of the inner pipe 6. Perform the heat insulating material laying process to be placed in.

Here, the sheath pipe burying step is performed by placing concrete in a state where the sheath pipe 5 is bound and fixed to the foundation reinforcing bar with a number wire or a band at the time of foundation work. At this time, the sheath pipe 5 is embedded in the foundation 2 so that the lower end portion thereof is substantially flush with the vertical surface portion 4 of the foundation 2 and the upper end portion thereof is substantially flush with the horizontal surface portion 3 of the foundation 2.
In the inner pipe installation step, it is preferable that the inner pipe 6 is installed substantially concentrically with the sheath pipe 5.

In the ant-proof member installation step, a sheet-shaped ant-proof member 30 is attached so as to cover between the outer peripheral surface 6a of the inner pipe 6 and the outer peripheral surface 5a of the sheath pipe 5, and the ant-proof member 30 and the lateral surface portion 3 are substantially connected to each other. It is preferable to install them so that they are flush with each other.
In the heat insulating material laying step, it is preferable to form an opening along the outer peripheral surface 6a of the inner pipe 6 at the site in accordance with the position of the inner pipe 6.

According to the present embodiment, the foundation 2 communicates with the horizontal surface portion 3 located on the indoor side of the foundation 2 of the building 1 and the portion 4a buried in the ground of the vertical surface portion 4 located on the outdoor side. A pipe structure 7 was constructed by installing a sheath pipe 5 and using the sheath pipe 5 to pass an inner pipe 6 between the inside and outside of the building 1. As a result, the inner pipe 6 can be easily inserted and pulled out through the sheath pipe 5, so that the inner pipe 6 can be easily installed and the inner pipe 6 can be repaired / renewed without damaging the foundation 2. It becomes possible to do. Therefore, the life of the building 1 can be extended.

In addition, a heat insulating layer 11 (heat insulating material 13) was formed so as to cover at least a portion closer to the outside of the lateral surface portion 3 of the foundation 2. By realizing such a heat insulating structure, the heat insulating performance of the foundation 2 portion of the building 1 can be improved, and the next-generation energy saving standard can be satisfied.

At this time, the heat insulating layer 11 was composed of a heat insulating material 13 formed of a resin foam containing no plasticizer. That is, since the heat insulating layer 11 is made of the resin foam, the heat insulating layer 11 can be constructed only by arranging the heat insulating material 13 at a desired position. In other words, the heat insulating layer 11 can be constructed without taking time and effort for construction.

Further, since the heat insulating material 13 does not contain a plasticizer, it is possible to prevent the inner pipe 6 from deteriorating even if it comes into contact with the resin inner pipe 6. Therefore, since the inner pipe 6 and the heat insulating material 13 can be arranged without a gap, the desired heat insulating performance can be easily and surely secured. Further, by adopting the heat insulating material 13 having a low water absorption rate (low water absorption amount), it is possible to prevent a state in which moisture is trapped in an underfloor space without a ventilation port, and the heat insulating material 13 is deteriorated or corroded. It is possible to reliably maintain the heat insulating performance without causing corrosion.

Further, since the resin foam containing no plasticizer is used as the heat insulating material 13, even if the inner pipe 6 is made of a hard vinyl chloride pipe or the like, the heat insulating material 13 can be installed in contact with the inner pipe 6. It becomes. In other words, since the heat insulating structure can be realized without using the heat insulating material foamed on site, it is possible to prevent the loss of anti-termite performance and heat insulating performance caused by the foamable heat insulating material not reaching the gap. , Construction can be simplified, leading to a reduction in construction costs.

Further, an anti-termite member 30 is provided at the boundary between the heat insulating material 13 and the lateral surface portion 3, and the anti-termite member 30 is provided so as to cover at least between the outer peripheral surface 6a of the inner pipe 6 and the outer peripheral surface 5a of the sheath pipe 5. It was. As a result, even when a continuous heat insulating layer 11 is provided on the lateral surface portion 3 of the foundation 2, the sheath pipe 5 is used to provide anti-termite performance to the portion through which the inner pipe 6 is passed between the inside and outside of the building 1. Can be done.

The heat insulating material 13 is a plate-shaped resin foam composed of a resin foam containing no plasticizer, paper such as kraft paper or glass fiber mixed paper bonded to the surface of the core material, or glass. It may be composed of a fiber non-woven fabric, a face material made of a synthetic fiber non-woven fabric such as polyester fiber or polypropylene fiber, and a face material. The face material of the heat insulating material 13 thus constructed may be coated with an anti-termite agent, or the face material may be made of a material containing glass fibers. Since the face material contains an anti-termite agent or contains glass fibers, the face material itself can have anti-termite performance.
Further, a sheet having anti-termite performance may be laminated on the above-mentioned face material or on the cross section where the core material of the heat insulating material 13 is exposed.

Further, with respect to the inner pipe 6, a fluid confluence portion 31 (header) is provided upstream of the inner pipe 6. As a result, when there is not enough room in the height for creating a drainage gradient between the floor surface (FL) and the lateral surface portion 3 of the foundation 2, or the confluence portion is due to the positional relationship with the drainage facility and the foundation structure. If the 31 cannot be installed near the foundation 2, the indoor pipe 8 should be connected to the inner pipe 6 at a position higher than the lateral surface portion 3 of the foundation 2, and the merging portion 31 should be installed in the middle of the indoor pipe 8. become. In this case, since the heat insulating material 13 is provided on the foundation 2, it is assumed that it is not necessary to provide the heat insulating material on the back surface of the floor surface FL. Then, since the merging portion 31 can be installed at a height directly below the floor surface FL of the building 1, even if the merging portion 31 is installed inside the building 1 away from the position of the inner pipe 6, the indoor piping It is possible to secure the drainage gradient required for 8. In other words, by providing the heat insulating material 13 on the lateral surface portion 3 of the foundation 2 to insulate on the foundation side, it is not necessary to provide the heat insulating material under the floor (the back surface of the floor surface FL). As a result, a wide space under the floor can be secured, and it can be effectively used as a piping space or the like.

According to the building 1 provided with the above-mentioned piping structure 7, the same effect as described above can be obtained.
According to the pipe installation method described above, the same effect as described above can be obtained.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are merely examples of the present invention. Therefore, the present invention is not limited to the configuration of the embodiment, and there may be design changes and the like within a range that does not deviate from the gist of the present invention. Further, for example, when a plurality of configurations are included in the embodiment, it goes without saying that possible combinations of these configurations are included even if there is no particular description.
For example, in the above embodiment, the case where the drain pipe of the hard PVC pipe is installed as an inner pipe has been described, but even if a water supply pipe composed of a polybuden pipe (or a cross-linked polyethylene pipe or the like) is installed as an inner pipe, it may be installed. Good. Even in this case, the polybuden pipe may be deteriorated by the heat insulating material containing the plasticizer, but by adopting the heat insulating material not containing the plasticizer, it is possible to prevent the pipe from being deteriorated even if it is brought into contact with the pipe.
Further, in the above embodiment, the case where the anti-termite member 30 is attached has been described, but the anti-termite member 30 is not always necessary, and the anti-termite performance may be ensured only by the anti-termite tape 24.

Further, in the above embodiment, the heat insulating material 13 and the inner pipe 6 are provided in contact with each other without a gap, but there is a slight gap between the heat insulating material 13 and the inner pipe 6 to the extent that there is no problem in heat insulating performance. There may be. Since the distance between the sheath tube 5 and the inner tube 6 is usually about 1 cm, in the present embodiment, a gap of less than 1 cm may be included between the heat insulating material 13 and the inner tube 6. When there is a slight gap between the inner pipe 6 and the heat insulating material 13, an in-situ foamed heat insulating material may be used. As the on-site foam heat insulating material, a spray-type heat insulating foam or the like can be used. The spray-type heat insulating foam is, for example, a spray can filled with a urethane foam raw material as a propellant.

1 Building 2 Foundation 3 Horizontal surface 4 Vertical surface 5 Sheath pipe 5a Outer peripheral surface 6 Inner pipe 6a Outer peripheral surface 7 Piping structure 11 Insulation layer 13 Insulation material 30 Anti-termite member 31 Confluence part 32 Confluence part

Claims (5)

A sheath pipe installed so as to communicate between the horizontal surface portion located on the indoor side and the vertical surface portion located on the outdoor side in the foundation of the building and buried in the ground.
In a piping structure including an inner pipe that is passed between the inside and outside of a building using the sheath pipe.
A heat insulating layer is provided so as to cover at least a portion of the lateral surface of the foundation that is closer to the outside.
The heat insulating layer is formed of a heat insulating material arranged to surround around the inner tube,
The heat insulating material is formed of a resin foam containing no plasticizer and is formed of a resin foam .
A piping structure characterized in that the heat insulating material is provided so as to come into contact with an outer peripheral surface of the inner pipe that rises so as to protrude from the lateral surface portion. A sheath pipe installed so as to communicate between the horizontal surface portion located on the indoor side and the vertical surface portion located on the outdoor side in the foundation of the building and buried in the ground.
In a piping structure including an inner pipe that is passed between the inside and outside of a building using the sheath pipe.
A heat insulating layer is provided so as to cover at least a portion of the lateral surface of the foundation that is closer to the outside.
The heat insulating layer is composed of a heat insulating material arranged so as to surround the inner pipe.
The heat insulating material is formed of a resin foam containing no plasticizer and is formed of a resin foam.
An anti-termite member is provided at the boundary between the heat insulating material and the lateral surface portion.
The piping structure is characterized in that the anti-termite member is provided so as to cover at least between the outer peripheral surface of the inner pipe and the outer peripheral surface of the sheath pipe. In the piping structure according to claim 1 or 2.
The inner pipe is a pipe structure made of resin. A building characterized by having the piping structure according to any one of claims 1 to 3. The sheath pipe burying process in which the foundation is placed with the sheath pipe embedded so as to communicate between the horizontal surface portion located on the indoor side and the vertical surface portion located on the outdoor side to be buried in the ground.
The inner pipe installation process of penetrating the inner pipe between the inside and the outside of the building through the sheath pipe,
An anti-termite member installation step of providing an anti-termite member so as to cover between the outer peripheral surface of the inner pipe and the outer peripheral surface of the sheath pipe.
A heat insulating material laying step of laying a heat insulating material so as to cover at least a portion closer to the outside of the lateral surface portion of the foundation and laying the heat insulating material so as to abut the outer peripheral surface of the inner pipe rising so as to protrude from the lateral surface portion. And have
A pipe installation method, characterized in that a heat insulating layer is formed on a lateral surface portion of the foundation on which the sheath pipe and the inner pipe are installed.

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