JP2018096483A - Piping structure and piping construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mainly provide a piping structure which is simple and good in workability, and has high cut-off performance.SOLUTION: The present invention relates to a piping structure that has piping 2 installed over between an inner part and an outer part of a building 1. The piping structure comprises a pipe body 11 buried in the foundation 3 of the building 1, a small-diameter pipe part 12 inserted into the pipe body 11, and a cut-off material 14 provided at a gap part 13 between the pipe body 11 and small-diameter pipe part 12. The pipe body 11 is linear, and installed obliquely in the foundation 3 to be open in the ground. The small-diameter pipe part 12 is composed of piping 2 having a smaller diameter than the pipe body 11. The cut-off material 14 has a first solid cut-off material 14a provided on an outdoor side 5, and a second fluid and curable cut-off material 14b charged and cured more on an outdoor side 4 than the first solid cut-off material 14a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a piping structure and a piping construction method.

  A building such as a house has a piping structure in which piping is installed so as to straddle between the inside and the outside of the building. In such a piping structure, the piping is installed so as to penetrate the foundation of the building (see, for example, Patent Document 1 to Patent Document 4).

Japanese Patent Laid-Open No. 2005-200963 JP 2002-115294 A JP 2002-54203 A JP 2011-247374 A Japanese Utility Model Publication No. 61-186070 JP 2001-159162 A JP 2010-043406 A

  When penetrating a pipe through the foundation of a building, as disclosed in Patent Document 1, it is conceivable to embed a sheath pipe in the penetrating portion of the foundation and pass the pipe through the sheath pipe. By using the sheath pipe in this way, it is possible to perform maintenance of the pipe itself that is passed through the sheath pipe without destroying the foundation when the pipe is maintained. However, in Patent Document 1, since a short straight pipe as a sheath pipe is horizontally embedded in the penetration portion of the foundation, it is impossible to prevent inundation from the outside by itself. Was needed.

Therefore, in Patent Documents 2 to 4, in order to prevent water from entering the inside of the foundation from the outside, for example, a height difference or the like is provided in a sheath or pipe embedded in the foundation. And in order to give a height difference, a long and bent pipe | tube etc. are used for a sheath pipe | tube. For this reason, the installation range of the sheath and the pipe on the foundation is widened, and the structure of the installation portion of the sheath and the pipe on the foundation is complicated. In particular, in Patent Document 4, since the sheath tube is made longer and has many bent portions that extend to the outside of the foundation (especially the outdoor side), the sheath tube installation structure is further complicated. It was.
Moreover, while using the flexible pipe | tube of the length which covers piping covering substantially the whole area like patent document 5-patent document 7, what was made to penetrate a pipe | tube horizontally with respect to a foundation with every flexible pipe | tube. Although it exists, since the flexible pipe is long, the cost of the flexible pipe is high, and the handling of the flexible pipe at the time of construction and the embedding to the foundation of the flexible pipe have been troublesome.

  Therefore, the present invention mainly aims to solve the above-described problems.

In order to solve the above-described problems, the present invention provides a pipe structure in which a pipe is installed between the inside and the outside of a building, and a pipe body embedded in the foundation of the building and the pipe body. A small-diameter pipe portion, and a water stop material provided in a gap portion between the pipe body and the small-diameter pipe portion. The pipe body has a straight tube shape, and the indoor side is high and the outdoor side is low. The small-diameter pipe part is configured by the pipe having a smaller diameter than the pipe body so that the pipe can be inserted into and removed from the pipe body so as to be opened in the ground. The material is a solid first water-stop material provided on the outdoor side of the gap, and a fluid and curable second material that is filled and hardened on the indoor side of the solid first water-stop material in the gap. And a water stop material.
Moreover, in the piping construction method of installing piping between the inside and outside of the building, the pipe is embedded in the foundation of the building, and the pipe having a diameter smaller than the pipe is configured. An insertion step of inserting a small diameter pipe portion into the pipe body and a water stop step of providing a water stop material in a gap portion between the pipe body and the small diameter pipe portion are sequentially performed. Using a straight tube, the pipe body is installed obliquely on the foundation so that the indoor side is high, the outdoor side is low and the ground is open, and in the water stop step, as the water stop material The solid first water blocking material is attached to the outdoor side of the gap portion, and the fluid and curable second water blocking material is filled on the indoor side of the solid first water blocking material in the gap portion. The gap is closed by curing the second water-stopping material. .

  According to the present invention, a pipe structure having a simple structure, good workability, and a high water-stopping property can be obtained at a low cost by the above configuration.

It is an expanded side sectional view of the foundation part of a building provided with the piping structure concerning this embodiment. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. (A) is a figure which shows the state where the gap part of a tubular body and a small diameter pipe part is appropriate, (b) is a figure which shows the state where the gap part between a pipe body and a small diameter pipe part is inappropriate. It is a figure which shows a mode that a 1st water stop material is attached with respect to the small diameter pipe part penetrated by the pipe body. (A) is a figure which shows the state which closed the lower end part of the tubular body with the tape, (b) is a figure which shows the state which closed the lower end part of the tubular body with the soil. (A) is a figure which shows a mode that the 2nd water stop material is filled into the gap | interval part of a pipe body and a small diameter pipe part, (b) is a 2nd water stop material in the gap part of a pipe body and a small diameter pipe part. It is a figure which shows the mode after being filled. It is a longitudinal cross-sectional view of the tubular body which shows the small diameter pipe part containing a refrigerant pipe. FIG. 8B is a partially cutaway side view of the small-diameter tube portion of FIG. 8A. It is a longitudinal cross-sectional view of the tubular body which shows the other example of the small diameter pipe part containing a refrigerant pipe. It is a figure which shows the mode of the preparation for the process with respect to a tubular body, (a) is a figure which shows a pattern paper, (b) is a figure which shows a mode that a pattern paper is cut, (c) is a figure which shows a mode that a cut pattern paper is bonded together It is. It is a figure which shows the mode of a process with respect to a tubular body, (a) is a figure which shows a mode that a paper pattern is wound around a tubular body, (b) is a figure which shows a mode that a cutting line is drawn on a tubular body based on a paper pattern, (c) FIG. 3 is a diagram showing a state of cutting a tubular body. It is a schematic perspective view which shows the state which set the tubular body to the reinforcing bar. It is the longitudinal cross-sectional view which looked at the foundation which embedded the tubular body from the side.

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

  <Configuration> The configuration will be described below.

  As shown in FIGS. 1 to 3 (mainly refer to FIG. 1), a piping structure is configured by installing a piping 2 so as to straddle between the inside and the outside of the building 1 with respect to a building 1 such as a house. . In this piping structure, the piping 2 is made to penetrate the foundation 3 of the building 1.

  Here, the inside of the building 1 is the indoor side 4 and the outside of the building 1 is the outdoor side 5.

  In addition to the basic or overall configuration as described above, this embodiment has the following configuration.

(1) The piping structure of this embodiment will be described.
The piping structure includes a tubular body 11 embedded in the foundation 3 of the building 1, a small-diameter pipe portion 12 inserted through the tubular body 11, and a water stop provided in a gap portion 13 between the tubular body 11 and the small-diameter pipe portion 12. And a material 14.
The tubular body 11 has a straight tube shape, and is installed obliquely on the foundation 3 so that the indoor side 4 becomes higher and the outdoor side 5 becomes lower and opens in the ground.
At this time, the small-diameter pipe portion 12 is configured by the pipe 2 having a diameter smaller than that of the tube body 11 so that the tube body 11 can be inserted and removed.
The water-stop material 14 is a solid first water-stop material 14 a provided on the outdoor side 5 of the gap portion 13 and a fluid that is filled and cured on the indoor side 4 rather than the solid first water-stop material 14 a in the gap portion 13. A curable second waterstop material 14b.

  Here, the foundation 3 is provided to support the building 1 on the ground, and is composed of reinforced concrete or the like.

  The pipe body 11 is a foundation penetrating member that is directly embedded in the foundation 3 so that the small-diameter pipe portion 12 can be installed between the inside and the outside of the building 1. In this case, the tube body 11 is a straight single short tube (sheath tube), and has a length that is almost right to communicate between the inside and the outside of the foundation 3. The tube body 11 is made of a resin such as hard polyvinyl chloride. The tube 11 has a circular cross section. The tube body 11 has an inclination angle within a range of 45 ° ± 15 ° with respect to the horizontal and has an upward slope toward the indoor side 4 or a downward slope toward the outdoor side 5, for example. Buried inside.

  The small-diameter pipe portion 12 preferably has the same diameter dimension over the entire length. For example, at least a portion passing through the inside of the tube body 11 is made small, or the downstream side of the tube body 11 is made small-diameter. Alternatively, the diameter of the upstream side of the tube body 11 may be reduced. The small-diameter pipe portion 12 has a straight portion (a rising portion or a falling portion) that is inclined in the same manner as the pipe body 11 at a portion that passes through the inside of the pipe body 11. Further, the small-diameter pipe portion 12 has a required drainage gradient with respect to the horizontal or horizontal, and is inclined gently (horizontal portion or gentle gradient portion) outside the tube body 11.

  As shown in FIG. 4A, it is preferable that the gap 13 has a uniform size in the circumferential direction. For this purpose, the small-diameter pipe portion 12 is installed in the center portion of the tube body 11 without any deviation. FIG. 4B shows an example of an unfavorable arrangement (an offset arrangement) in which the gap portion 13 is uneven in the circumferential direction.

  The water blocking material 14 is used as an inner peripheral seal that seals the inner peripheral side of the tube body 11 as shown in FIGS. Any water stop material 14 may be used as long as it can stop the gap 13. In this case, as the water stop material 14, the first water stop material 14 a and the second water stop material 14 b are tubular bodies. It is provided twice with respect to 11 axial directions. Among these, the solid first water-stopping material 14 a is provided mainly to prevent the small-diameter pipe portion 12 from being displaced from the pipe body 11. For example, as shown in FIG. 5 (FIG. 6), a solid elastic foam sealing material made of urethane, a rubber-based sealing material, or the like can be used as the solid first water blocking material 14 a. .

  The second water stop material 14b has fluidity at the time of construction and is cured with the passage of time. For example, as shown in FIG. A self-leveling material used for the top end of the roof or other materials can be used. The cement paste is obtained by adding 0.4 to 0.5 (by weight, 0.25 to 0.35) by volume of water to 1 and stirring the cement. In addition, a third water stop material, a fourth water stop material, etc. are further provided on the indoor side 4 from the second water stop material 14b, and the water stop material 14 is multiplexed in the axial direction of the tube body 11. May be. As the third water stop material, for example, the same material as the first water stop material 14a can be used.

  The underground is in the soil below the ground surface GL or the like, and the lower end portion of the tube 11 is located in the ground.

  (2) As shown in FIG. 8A, the small diameter pipe portion 12 may include a plurality of pipe members 21.

  Here, as a matter of course, the small-diameter pipe portion 12 can be constituted by only one pipe member 21, but it is also possible to include a plurality of pipe members 21 as described above. The plurality of pipe members 21 are arranged inside the tube body 11 together with another small diameter pipe portion 12 after passing through the inside of a separately prepared small diameter pipe portion 12 as shown in FIG. 8B, for example. preferable. As the other small-diameter pipe portion 12, for example, a flexible pipe made of a soft resin (for example, a corrugated pipe) can be used. The other small-diameter pipe portion 12 only needs to have a length at least as long as that of the pipe body 11. Further, as shown in FIG. 8C, it is structurally possible to directly install a plurality of pipe members 21 inside the pipe body 11.

  The pipe member 21 may be a hard or soft resin pipe, a metal pipe, a pipe made of other materials, a composite pipe using a plurality of materials, or the like. The pipe member 21 may be various types such as a drain pipe, a water supply pipe, a hot water supply pipe, and a gas pipe, for example.

  A plurality of pipe members 21 such as a drain pipe, a water supply pipe, a hot water supply pipe, and a gas pipe can be passed through the pipe body 11 or another small-diameter pipe portion 12. Alternatively, the drainage pipe, the water supply pipe, the hot water supply pipe, and the gas pipe can be passed through the tube body 11 or another small diameter pipe portion 12 in various combinations.

(3) Returning to FIG. 1, the foundation 3 may be a solid foundation 33 having a slab portion 31 and an upright portion 32 extending upward from the outer peripheral portion of the slab portion 31.
In this case, the tube body 11 may be provided so as to open to the indoor side 4 at the boundary portion 34 between the slab portion 31 and the upright portion 32.

  Here, the solid foundation 33 is such that the entire lower surface of the building 1 is covered with reinforced concrete. The slab portion 31 constitutes a bottom plate of the solid base 33. The slab portion 31 is a substantially horizontal and substantially flat plate-like body having substantially the same size and shape as the outer shape of the building 1.

  The upright portion 32 is a beam-like portion that is appropriately provided for a position below the outer wall, a position below the indoor wall, or the like (beam portion). The boundary portion 34 is an inner corner portion formed by the slab portion 31 and the upright portion 32. The upper end portion of the tubular body 11 is located at the boundary portion 34 and is opened so as to straddle the slab portion 31 and the upright portion 32.

  In addition, when viewed in a plan view, the tubular body 11 is short with the long side (girder side) portion, the short side (wife side) portion, and the long side (girder side) portion of the building 1. It can provide suitably with respect to the corner part with the part by the side (wife side). Further, if necessary, an inflating portion 36 that swells downward may be provided in a portion of the slab portion 31 around the lower portion of the tubular body 11.

  (4) As shown in FIG. 8A or FIG. 8C, the pipe member 21 constituting the small diameter pipe portion 12 may include a refrigerant pipe 41.

  Here, the refrigerant pipe 41 is, for example, for connecting an outdoor unit installed outdoors in an entire building air conditioning system and an indoor unit such as a radiator provided indoors to circulate the refrigerant therebetween. And so on. The outdoor unit may be, for example, a heat pump type electric water heater or a household fuel cell cogeneration system in addition to the whole building air conditioning system. The refrigerant pipe 41 can be provided with one or two of the supply side and the discharge side. In this case, the (two) refrigerant pipes 41 are passed (arranged) inside the pipe member 21 or another small-diameter pipe portion 12. In addition, a power cable 45 and a ground wire 46 for supplying power to an outdoor unit such as a whole building air conditioning system can be passed through the pipe member 21.

(5) Next, the construction method (pipe construction method) of the above-described piping structure will be described.
In this pipe construction method, the pipe 2 is installed between the inside and the outside of the building 1.
And the embedding process which embeds the pipe body 11 in the foundation 3 of the building 1, the insertion process which penetrates the small diameter pipe part 12 comprised by the pipe 2 smaller in diameter than the pipe body 11 to the pipe body 11, and the pipe body 11 And a water stop step of providing a water stop material 14 in the gap 13 between the small diameter pipe portion 12 and the small diameter pipe portion 12 are sequentially performed.
At this time, in the embedding process, a straight tube is used as the tube body 11, and the tube body 11 is slanted to the foundation 3 so that the indoor side 4 is raised and the outdoor side 5 is lowered and opened in the ground. Install in.
In the water stop process, a solid first water stop material 14a is attached to the outdoor side 5 of the gap 13 as the water stop material 14 (first water stop material installation process).
Next, the fluid-curing second water-stopping material 14b is filled into the indoor side 4 rather than the solid first water-stopping material 14a in the gap portion 13, and the gap portion 13 is formed by curing the second water-stopping material 14b. Block (second waterstop material installation step).

  If demonstrating it more concretely, an embedding process will be performed at the time of foundation construction. An insertion process and a water stop process are performed at the time of piping construction after foundation construction. A water stop process is divided into a 1st water stop material installation process and a 2nd water stop material installation process, and is performed in order.

  Prior to the embedding process, the tube body 11 is processed at the site so as to match the shape of the embedding site. For example, as shown in order in FIG. 9A to FIG. 9C, a template 55 prepared in advance according to the diameter of the tube body 11 is cut and bonded together, and this is bonded to FIG. 10A to FIG. As shown in order in (c), the tube 11 is wound around the unprocessed tube 11 to mark the cutting line 56, and both ends are cut by the cutting means 57. As a result, the tube body 11 is obliquely embedded in the boundary portion 34 between the slab portion 31 and the upright portion 32 of the foundation 3 with the lower end side cut obliquely as viewed from the side and the upper end side cut into a corner shape. It will be of almost the right length and shape.

  Next, as shown in FIG. 11, when the reinforcing bar 58 is completely arranged during foundation construction, the tubular body 11 is set on the reinforcing bar 58. The tube body 11 is fixed to the reinforcing bar 58 so as not to move by using a fixing means such as a wire.

  At this time, with respect to the reinforcing bar 58 that interferes with the tubular body 11, the interfering part is partially cut, and reinforcing bars are appropriately arranged on the part where the reinforcing bar 58 is cut.

  If necessary, in consideration of adhesion and adhesion to the concrete constituting the foundation 3, a water-swellable one-component elastic sealing material or a water-swellable clay is provided on the outer periphery of the tube 11. A sealing material such as a sealing material (peripheral seal) may be wound.

  Then, the reinforcing bars 58 are surrounded by a mold together with the tubular body 11, and concrete is placed inside the mold. At this time, it is preferable to prevent the concrete from flowing into the inside of the tubular body 11 by closing both ends of the tubular body 11 with a tape 62 or the like. Moreover, about the part around the pipe body 11, it is made not to vibrate with a vibrator so that the position of the pipe body 11 may not shift. Thereby, as shown in FIG. 12, the pipe body 11 (and the reinforcing bar 58) is embedded in the foundation 3.

  When inserting the small-diameter pipe portion 12 into the pipe body 11 when laying the pipe after the foundation construction, for example, as shown in FIG. 5, the position of the pipe body 11 from the lower end portion and the position of the pipe body 11 from the upper end portion. Alternatively, a bent pipe portion such as an elbow member 63 may be installed so that the small-diameter pipe portion 12 can be routed substantially horizontally outside the tube body 11.

  In the water stop step, first, in the first water stop material installation step, as shown in FIG. 5, the first water stop member 14a is attached to the outer periphery of the small diameter tube portion 12 from the outdoor side 5, and the small diameter tube portion is attached. The first water stop material 14a is pushed into the gap portion 13 between the outer periphery of the tube 12 and the lower end portion of the tube body 11 to prevent the small diameter tube portion 12 from being displaced with respect to the tube body 11, and the gap portion 13 in the circumferential direction. Try to be even. Thereby, the space which can be satisfactorily filled with the 2nd water stop material 14b in the gap | interval part 13 is ensured. The first water blocking material 14a may be, for example, a ring shape (with a cut), a deformable rod shape, or the like. If necessary, the lower end of the tube 11 is further closed with a tape 62 or the like as shown in FIG. 6A, or at least the lower end of the tube 11 as shown in FIG. 6B. The soil may be backfilled (partially or entirely) so that the opening of the part is closed.

  Next, in the second waterstop material installation step, as shown in FIG. 7, from the opening of the upper end portion of the tubular body 11 located on the indoor side 4, the outer periphery of the small diameter tubular portion 12 and the upper end portion of the tubular body 11 The second water blocking material 14 b is poured into the gap portion 13 to the same height as the upper surface of the slab portion 31. Since the 2nd water stop material 14b only needs to be poured, workability | operativity is good. Then, curing is performed until the second water stop material 14b is cured. Thus, when the second waterstop material 14b is cured, the second waterstop material 14b seals the gap portion 13 up to the position of the upper surface of the slab portion 31 so that the small-diameter pipe portion 12 does not come out of the tube body 11. It is fixed by the second water stop material 14b. As a result, the foundation 3 can obtain a substantially complete water-stopping state at the portion where the tubular body 11 is installed.

  <Effect> According to this embodiment, the following effects can be obtained.

  (Effect 1) The short pipe 11 is embedded in the foundation 3 of the building 1, the small-diameter pipe 12 is inserted into the pipe 11, and the water blocking material 14 is inserted into the gap 13 between the pipe 11 and the small-diameter pipe 12. Provided. Thereby, the small diameter pipe part 12 can be easily installed so as to straddle the inside and outside of the building 1 through the pipe body 11. Further, since the small-diameter pipe portion 12 is passed through the pipe body 11, when maintaining the small-diameter pipe section 12, the small-diameter pipe section 12 passed through the inside of the pipe body 11 without destroying the foundation 3. Maintenance of itself becomes possible. At this time, the water blocking material 14 can prevent water from entering the inside of the foundation 3 from the outside through the gap portion 13 between the tubular body 11 embedded in the foundation 3 and the small diameter pipe portion 12. Moreover, the small diameter pipe part 12 can ensure waterproofness, without being influenced by the kind (pipe).

  And the pipe body 11 was made into the straight pipe | tube, and it installed diagonally with respect to the foundation 3 so that the indoor side 4 might become high, the outdoor side 5 might become low, and it might open in the ground. As a result, a piping structure that is simple in structure, has good workability, has high water-stopping properties, and is unlikely to flood from the outdoor side 5 to the indoor side 4 can be obtained at low cost.

Further, the water-stopping material 14 is filled and cured on the indoor side 4 rather than the solid first water-stopping material 14 a provided on the outdoor side 5 of the gap 13 and the solid first water-stopping material 14 a in the gap 13. And a second water-stopping material 14b that is fluid and curable. Thereby, a stronger and more reliable water stop state can be obtained by the water stop effect (relative to the axial direction of the tubular body 11) by the first water stop material 14a and the second water stop material 14b. Further, the solid first water blocking material 14a functions as a member that secures a filling space necessary when the gap 13 is filled with the fluid / curable second water blocking material 14b. Thus, the second water blocking material 14b can be evenly filled.
In addition, the second water-stopping material 14b is made to flow through the natural flow of the fluid / curing second water-stopping material 14b from the high position on the indoor side 4 toward the low position on the outdoor side 5 (using gravity). Since the portion 13 is reliably filled, it is possible to prevent the occurrence of poor construction. On the other hand, for example, when the pasted silicone resin sealing material is simply filled into the opening end portion of the tube body 11, there is a risk that construction failure such as insufficient filling or poor filling may occur depending on the construction method. Therefore, it is necessary to take another measure that assumes a construction failure. However, in the case of this embodiment, since it has a structure in which construction failure is unlikely to occur as described above, it is possible to eliminate the need to separately prepare a measure that assumes construction failure.

  (Operation Effect 2) The small-diameter pipe portion 12 can include a plurality of pipe members 21. Thereby, the several pipe member 21 can be arrange | positioned ranging over the inside and outside of the building 1 through the pipe body 11 in the state which maintained water stop.

  (Effect 3) The tubular body 11 is provided so as to open to the indoor side 4 at the boundary portion 34 between the slab portion 31 and the upright portion 32 of the solid foundation 33. Thereby, the pipe body 11 can be embedded so that the installation range becomes small at the position of the boundary portion 34 that is hardly disturbed in the solid foundation 33, and the small-diameter pipe portion 12 is made space efficient by using the pipe body 11. It can be installed so as to straddle between the inside and outside of the building 1.

  (Effect 4) The pipe member 21 constituting the small-diameter pipe portion 12 includes the refrigerant pipe 41. Accordingly, the refrigerant can be circulated between the inside and the outside of the building 1 by passing the refrigerant pipe 41 through the pipe body 11 while maintaining the water-stopping property.

  (Effect 5) According to the above-mentioned piping construction method, the same effect as the above piping structure can be obtained.

  As mentioned above, although embodiment of this invention has been explained in full detail with drawing, embodiment is only an illustration of this invention. Therefore, the present invention is not limited only to the configuration of the embodiment, and it goes without saying that design changes and the like within a scope not departing from the gist of the present invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. In addition, in the case where a plurality of examples and modifications are disclosed in the embodiment as those of the present invention, possible combinations of combinations extending over these are included even if not specifically described. Of course. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Building 2 Piping 3 Foundation 4 Indoor side 5 Outdoor side 11 Tube 12 Small diameter pipe part 13 Gap part 14 Water stop material 14a 1st water stop material 14b 2nd water stop material 21 Pipe member 31 Slab part 32 Standing upper part 33 Solid foundation 34 Boundary part 41 Refrigerant pipe

Claims (5)

In the piping structure where piping is installed between the inside and outside of the building,
A pipe embedded in the foundation of the building;
A small-diameter pipe portion inserted through the pipe body;
A water stop material provided in a gap between the pipe body and the small-diameter pipe part,
The tubular body has a straight tube shape and is installed obliquely on the foundation so that the indoor side becomes high and the outdoor side becomes low and opens in the ground,
The small-diameter pipe portion is configured by the pipe having a diameter smaller than that of the pipe body so that the pipe body can be inserted and removed.
The water stop material is a solid first water stop material provided on the outdoor side of the gap,
A pipe structure comprising: a fluidized / curable second waterstop material that is filled and hardened on the indoor side of the solid first waterstop material in the gap portion. The piping structure according to claim 1,
The small-diameter pipe portion includes a plurality of pipe members. The piping structure according to claim 1 or 2,
The foundation is a solid foundation having a slab portion and an upright portion extending upward from the outer peripheral portion of the slab portion,
The piping structure, wherein the pipe body is provided so as to open to an indoor side at a boundary portion between the slab portion and the upright portion. The piping structure according to any one of claims 1 to 3,
The piping structure characterized by the pipe member which comprises the said small diameter pipe part including the refrigerant | coolant pipe | tube. In the piping construction method that installs piping between the inside and outside of the building,
An embedment process of burying a pipe body in the foundation of the building;
An insertion step of inserting a small-diameter pipe portion constituted by the pipe having a smaller diameter than the pipe body into the pipe body;
While sequentially performing a water stop step of providing a water stop material in the gap between the pipe body and the small diameter pipe portion,
In the embedding step, using a straight tube for the tube, the tube is installed obliquely on the foundation so that the indoor side is high and the outdoor side is low and open in the ground,
In the water stop step, as the water stop material, a solid first water stop material is attached to the outdoor side of the gap,
Using the fluidized and curable second waterstop material on the indoor side of the solid first waterstop material in the gap portion, the gap portion is closed by filling and hardening the second waterstop material. Piping method to do.