JP2012077576A - Drainpipe to be buried in foundation and method for adjusting length of the drainpipe to be buried in foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainpipe to be buried in foundation, which prevents an inner pipe from excessively protruding from a sheath pipe during operation for connection to an indoor drainpipe.SOLUTION: A drainpipe 1A to be buried in foundation comprises a sheath pipe 2 and an inner pipe 3. An inner pipe-side movement restriction part 34 is arranged on the outer peripheral surface of an upstream-side receiving port member 32 (indoor-side pipe end) of the inner pipe 3, while a sheath pipe-side movement restriction part 21 is arranged on the inner peripheral surface of the sheath pipe 2. When the inner pipe 3 is arranged in the sheath pipe 2, the movement of the inner pipe 3 in outdoor direction is restricted at a position where the inner pipe-side movement restriction part 34 of the inner pipe 3 comes in contact with the sheath pipe-side movement restriction part 21 of the sheath pipe 2.

Description

  The present invention relates to a foundation burying drain pipe buried in a building foundation and a length adjusting method of the foundation burying drain pipe.

  Conventionally, a drainage structure has been provided that allows drainage from indoor drainage facilities such as toilets installed in buildings to be discharged to outdoor drainage channels through drainage pipes embedded in the foundation of the building. Has been. For example, as the drainage structure, a structure comprising a sheath pipe embedded in a foundation and a flexible pipe joint mounted in the sheath pipe has been proposed (see Patent Document 1). Further, Patent Document 1 also discloses a configuration in which the above-described sheath pipe portion protruding from the foundation concrete layer is cut at the boundary with the concrete layer.

  If the drainage pipe embedded in the foundation in a penetrating manner is composed of a sheath pipe and a flexible pipe joint, the flexible pipe joint can be detached from the sheath pipe without damaging the foundation. There is an advantage that the flexible pipe joint can be easily inspected and replaced. Moreover, there is an advantage that if the sheath pipe portion protruding from the concrete layer is cut, the drainage pipe on the lower floor side can be easily pulled.

JP 2008-150889 A

  However, since the configuration of Patent Document 1 has no means for fixing the flexible pipe joint in the sheath pipe, for example, when connecting an indoor drain pipe to the indoor side pipe end of the flexible pipe joint, When the connection work is performed, the flexible pipe joint may be pushed out in the outdoor direction, and the flexible pipe joint may protrude from or protrude from the outdoor pipe end of the sheath pipe. Alternatively, an unreasonable force may act on the flexible pipe joint, causing the flexible pipe joint to buckle in the sheath and cause a problem that smooth drainage flow cannot be secured.

  In addition, the configuration disclosed in the above-mentioned Patent Document 1 is for general purpose pipe addition to the indoor side pipe end of the sheath pipe because none of the sheath end faces of the sheath pipe is perpendicular to the pipe axis direction of the sheath pipe. The socket socket cannot be installed. Therefore, it is impossible to connect the drain pipe for pipe addition to the sheath pipe, and it is difficult to extend the length of the sheath pipe to be extended in the indoor direction.

  Further, in the configuration of the above-mentioned Patent Document 1, if the length of the flexible pipe joint is not properly selected in advance even if the sheath protruding from the concrete layer is cut, the upper end of the flexible pipe joint Is also exposed from the concrete layer. Here, it is possible to suggest that the sheath and the flexible pipe joint portion protruding from the concrete layer are cut so that the flexible pipe joint does not protrude from the concrete layer, but the hardness is different from each other. The operation of cutting the sheath pipe and the flexible pipe joint is troublesome and complicated, and the finish of the cut end tends to be complicated.

  After all, in the configuration of Patent Document 1, since it is difficult to adjust the length of the sheath pipe and the flexible pipe joint at the construction site, the length of the sheath pipe and the flexible pipe joint is not required to be adjusted at the construction site in advance. There are many products with different length dimensions, and it is necessary to select and use the one with the optimum length dimension as appropriate. However, such a configuration that must have a large number of stocks has a problem that the cost of the product is increased as a whole.

  Then, an object of this invention is to provide the drainage pipe for foundation burying which can solve the said problem, and the length adjustment method of this.

  The present invention relates to a sheath pipe that is embedded in the foundation of a building in a penetrating manner, and is inserted from an indoor side pipe end of the sheath pipe and disposed in the sheath pipe, and drains water in the building to an outdoor drainage path. An inner pipe-side movement restricting portion having a diameter larger than the outer diameter of the inner pipe main body portion provided on the outer peripheral surface of the indoor side pipe end portion of the inner pipe. A sheath tube side movement restricting portion having a diameter smaller than the inner diameter of the indoor tube end of the sheath tube is provided on the inner peripheral surface of the sheath tube, and the inner tube is disposed in the sheath tube. When the inner tube side movement restricting portion of the inner tube is in contact with the sheath tube side movement restricting portion of the sheath tube, the movement of the inner tube in the sheath tube is regulated in the outdoor direction. This is a drainage pipe for foundation burial.

In the above configuration, when the inner tube side movement restricting portion of the inner tube comes into contact with the sheath tube side movement restricting portion of the sheath tube, the movement of the inner tube in the outdoor direction is restricted. Are connected to each other (including connection via a joint, the same applies hereinafter), and the inner tube is not pushed out to the outside and excessively protrudes from the sheath tube.
Moreover, since it becomes possible to connect a required pipe to the inner pipe while pressing the inner pipe side movement restricting part of the inner pipe against the sheath pipe side movement restricting part of the sheath pipe, the inner pipe and the indoor drain pipe There is also an advantage that it becomes easy to perform the connecting work. Further, in the state where the inner tube side movement restricting portion of the inner tube is in contact with the sheath tube side movement restricting portion of the sheath tube, an excessive force does not act on the inner tube main body portion of the inner tube. Deformation of the tube main body is suppressed, and problems such as buckling of the inner tube main body do not occur.

  In addition, the sheath pipe has a curved pipe-shaped sheath pipe main body portion and a straight pipe-shaped indoor side pipe end portion coupled to the sheath pipe main body portion. The other end of the straight pipe-shaped relay pipe, one end of which is connected to the indoor drain pipe in the building, is connected to the indoor pipe end of the sheath pipe, and the sheath pipe and the sheath pipe The relay pipe is preferably made of a material harder than the inner pipe main body, and the indoor pipe end of the sheath pipe and the relay pipe are preferably cut.

  In the said structure, the length of this drainage pipe for foundation | burying can be shortened to desired length by cut | disconnecting the indoor side pipe end part and relay pipe of a sheath pipe. In this cutting operation, when the inner tube side movement restricting portion of the inner tube and the sheath tube side movement restricting portion of the sheath tube are brought into contact with each other, the position of the relay tube is stably fixed in the sheath tube. Therefore, it becomes easy to perform the cutting operation. Further, since the sheath tube and the relay tube are made of a material harder than the inner tube main body, it is easy to cut along the operator's intention. Then, after the cutting operation, an indoor drain pipe is connected to one end of the length-adjusted relay pipe (including a connection through a joint, the same applies hereinafter), whereby the drainage of the indoor drainage facility is transferred to the outdoor drainage path. It becomes possible to drain.

  Moreover, it is desirable that a pipe cutting mark indicating a cuttable range be provided on the outer peripheral surface of the indoor side pipe end of the sheath pipe.

  If it is the said structure, an appropriate cutting position will become still clearer at the time of a cutting operation.

  Further, at least one indoor side pipe end surface of the sheath pipe and the relay pipe is formed at right angles to the indoor side pipe end portion of the sheath pipe having the pipe end face or the pipe axis direction of the relay pipe. The pipe end having the pipe end face may be connected to a pipe addition drain pipe via a pipe addition socket.

  In the said structure, it becomes possible to extend the length of this distribution pipe for foundation burying to an indoor direction via the pipe connection socket.

  Further, the present invention is a method for adjusting the length of the above-mentioned foundation burying drain pipe, wherein the indoor side pipe end of the sheath pipe and the relay pipe are cut on the indoor side, whereby the foundation burying drain pipe It is a length adjustment method of a drain pipe for foundation embedding characterized by adjusting the length.

  In the length adjusting method, by cutting the indoor side pipe end of the sheath pipe and the relay pipe on the indoor side, the length of the drainage pipe for foundation embedding extended to the indoor side is reduced to a desired length. Can be shortened.

  Further, when cutting the indoor side pipe end of the sheath pipe and the relay pipe, the sheath pipe is cut along a direction orthogonal to the tube axis direction of the indoor side pipe end of the sheath pipe, The relay pipe is preferably cut in a direction perpendicular to the pipe axis direction of the relay pipe.

  If it is the above method, cutting work is easier than the configuration of cutting in a non-orthogonal direction with respect to the tube axis direction, and the cut end of the cut tube is perpendicular to the tube axis of the tube. There is also an advantage that the cut tube can be easily reused for other purposes. Further, a general-purpose pipe connection socket can be used as it is.

  Further, the present invention is a method for adjusting the length of the drainage pipe for foundation burying, wherein at least one indoor side pipe end surface of the sheath pipe and the relay pipe is used as the shell pipe housing having the pipe end face. A foundation characterized in that a drainage pipe for pipe addition is connected to a pipe end having a pipe end face through a socket for pipe addition, which is formed at a right angle to the inner pipe end or the pipe axis direction of the relay pipe. This is a method for adjusting the length of a buried drain pipe.

  In the said length adjustment method, the length of the drain pipe for foundation burying can be extended to a desired length in an indoor direction.

The drainage pipe for foundation embedding according to the present invention can prevent the inner pipe from being pushed out in the outdoor direction during the connecting operation of the indoor drain pipe and excessively protruding from the sheath pipe.
Moreover, the length adjustment method of the foundation embedding drain pipe of this invention can adjust the length of the foundation embedding drain pipe easily and reliably.

Side sectional view of the drainage pipe for foundation burial of the first embodiment Enlarged view of FIG. Side sectional view of the drainage pipe for foundation burial of the second embodiment Side sectional view of the drainage pipe for foundation burial of the third embodiment

[First embodiment]
An embodiment of a foundation burying drain pipe 1A used by being buried in a building foundation 100 will be described with reference to FIGS.

  As shown in FIG. 1, the foundation burying drain pipe 1 </ b> A has a sheath pipe 2 embedded in a base 100 of a building (not shown) in a penetrating manner. The sheath tube 2 is a bent tube-shaped sheath tube main body portion 2A and a straight tube shape extending from the indoor side end portion of the sheath tube body portion 2A upward at an angle of approximately 45 ° with respect to the horizontal plane. It is comprised with the indoor side pipe end part 2B.

  The sheath tube 2 is a molded product made of a hard vinyl chloride resin material having a circular cross section (inner diameter: 100 mm) and having a non-concave shape on both the outer peripheral surface and the inner peripheral surface.

Further, a sheath tube side movement restricting portion 21 is provided on the inner peripheral surface of the sheath tube 2 to reduce the inner diameter of the indoor tube end portion 2B toward the sheath tube main body direction (outdoor direction). Specifically, as shown in FIG. 2, the diameter of the tube wall near the sheath tube main body 2 </ b> A at the indoor side tube end 2 </ b> B of the sheath tube 2 decreases toward the sheath tube main body direction (outdoor direction). The sheath tube side movement restricting portion 21 is configured by being molded into a shape to be formed.
The sheath tube side movement restricting portion 21 inclines the inner peripheral surface of the indoor side tube end 2B of the sheath tube 2 so that the inner diameter of the indoor side tube end 2B is in the direction of the sheath tube main body (outdoor direction). It may be configured by a tapered portion that decreases toward the end, or may be configured by a protruding step portion protruding from the inner peripheral surface. Further, the sheath tube side movement restricting portion 21 may be formed continuously along the circumferential direction of the sheath tube 2 or may be formed discontinuously. Furthermore, the sheath tube side movement restricting portion 21 may be configured as a separate component from the sheath tube 2.

  Further, as shown in FIG. 1, the foundation burying drain pipe 1 </ b> A has an inner pipe 3 disposed in the sheath pipe 2. The inner pipe 3 includes a flexible inner pipe main body 31 that is formed in a curved pipe shape in advance to form an inner pipe main body portion, and the inner pipe connected to the indoor side pipe end of the inner pipe main body 31. 3, an upstream side receiving member 32 constituting the indoor side pipe end portion, and a downstream side receiving member 33 connected to the outdoor side pipe end of the inner pipe main body 31.

  The inner tube main body 31 has a circular cross section, and the outer peripheral surface and the inner peripheral surface are non-recessed, and a synthetic rubber such as styrene-butadiene rubber (SBR), which is a softer material than the sheath tube 2, or a thermoplastic elastomer. Alternatively, a flexible molded product made of a soft vinyl chloride resin material is used. Further, the upstream side receiving member 32 and the downstream side receiving member 33 are formed of a hard vinyl chloride resin material.

Further, an inner pipe side movement restriction larger than the outer diameter of the inner pipe main body 31 is provided on the outer peripheral surface of the upstream receiving member 32 of the inner pipe 3 (that is, the indoor side pipe end portion of the inner pipe 3). A portion 34 is provided. Specifically, as shown in FIG. 2, a plurality of (for example, four) convex pieces 34 </ b> A are equally spaced along the circumferential direction of the upstream side receiving member 32 on the outer peripheral surface of the upstream side receiving member 32. The inner pipe side movement restricting portion 34 is configured by being convexly provided.
The inner tube side movement restricting portion 34 may be formed of a convex portion or the like formed continuously along the circumferential direction of the inner tube 3. Further, the inner pipe side movement restricting portion 34 may be configured as a separate part from the inner pipe 3.

  Further, as shown in FIG. 1, a straight pipe-shaped relay pipe 4 is further connected to the upstream-side receiving member 32 of the inner pipe 3, and the relay pipe 4 is substantially upward upward with respect to the horizontal plane. It arrange | positions in the indoor side pipe end part 2B of this sheath pipe 2 at an angle of 45 degrees.

  The relay pipe 4 has a circular cross section, and has an outer peripheral surface and an inner peripheral surface that are not uneven. A molded product made of a hard polyvinyl chloride resin material harder than the inner pipe main body 31 is used.

  In the above configuration, the inner tube 3 is inserted from the indoor side tube end of the sheath tube 2 and disposed in the sheath tube 2. At this time, when the inner tube 3 is excessively moved in the outdoor direction when the inner tube 3 is disposed in the sheath tube 2, the inner tube 3 moves to the sheath tube side movement restricting portion 21 of the sheath tube 2. The inner pipe side movement restricting portion 34 of the pipe 3 comes into contact with the pipe 3, and excessive movement of the inner pipe 3 in the outdoor direction is restricted.

  When constructing the drainage pipe 1A for foundation embedding, the sheath pipe 2 is first embedded in the foundation 100 in a penetrating manner, and then the relay pipe 4 is connected in the sheath pipe 2 embedded in the foundation 100. The inner pipe 3 is inserted from the indoor side pipe end (upper end pipe end) of the sheath pipe 2, and the inner pipe 3 and the relay pipe 4 are inserted into the sheath pipe 2 as shown in FIG. Deploy.

  Next, a watertight process is performed with a seal ring 5 interposed between the downstream receiving member 33 of the inner pipe 3 and the outdoor pipe end of the sheath pipe 2. On the other hand, an indoor drain pipe (not shown) arranged in the building is connected to the indoor pipe end of the relay pipe 4 so that drainage from indoor drainage equipment (for example, a toilet) can be drained to an outdoor drainage path. To do.

  In the above construction process, when the relay pipe 4 and the indoor drain pipe are connected, an external force in the outdoor direction may act on the inner pipe 3 through the relay pipe 4. When the sheath tube side movement restricting portion 21 of the sheath tube 2 and the inner tube side movement restricting portion 34 of the inner tube 3 come into contact with each other, excessive movement of the inner tube 3 in the outdoor direction is restricted, and the inner tube 3 does not protrude or jump out excessively from the outdoor tube end of the sheath tube 2.

  In the construction process, the indoor drain pipe can be connected to the relay pipe 4 while the inner pipe side movement restricting portion 34 of the inner pipe 3 is brought into contact with the sheath pipe side movement restricting portion 21 of the sheath pipe 2. When the inner pipe 3 is positioned, the relay pipe 4 is stably fixed, and the connection work between the relay pipe 4 and the indoor drain pipe becomes easy. Furthermore, in the state where the inner tube side movement restricting portion 34 of the inner tube 3 is in contact with the sheath tube side movement restricting portion 21 of the sheath tube 2, an excessive force does not act on the inner tube main body 31 of the inner tube 3, The inner pipe main body 31 is not buckled.

Further, in the above-mentioned foundation burying drain pipe 1A, before connecting the indoor drain pipe to the relay pipe 4, the indoor pipe end 2B of the sheath pipe 2 and the relay pipe 4 are cut indoors. The length of the foundation burying drain pipe 1A can be shortened.
More specifically, as shown in FIG. 1, on the outer peripheral surface of the indoor side pipe end 2B of the sheath pipe 2, the pipe axial direction of the indoor side pipe end 2B of the sheath pipe 2 (that is, the relay pipe 4). A raised tube-cutting mark 22 formed along a direction perpendicular to the tube axis direction) is provided. The pipe cutting mark 22 indicates a range where appropriate cutting is possible. Specifically, if a desired position of the indoor side portion is cut from the pipe cutting mark 22, the pipe end of the indoor drain pipe is cut. It is possible to shorten the length of the foundation burying drain pipe 1A extended to the indoor side to a desired length while securing the pipe length of the relay pipe 4 necessary to properly fit the pipe. Here, the sheath tube 2 and the relay tube 4 to be cut are both made of a hard polyvinyl chloride resin material that is harder than the inner tube main body 31 and has a hardness suitable for cutting. Since the direction perpendicular to the tube axis direction of the inner tube end 2B (that is, the tube axis direction of the relay pipe 4) is the cutting direction k, workability is very good. If an attempt is made to cut the flexible inner tube main body 31, the inner tube main body 31 is excessively elastically deformed compared to the sheath tube 2, and the cutting portion is unintentionally displaced or wavy. Thus, the cutting operation becomes extremely troublesome and complicated. Further, if the cutting direction k is a non-orthogonal direction with respect to the pipe axis direction of the indoor side pipe end 2B of the sheath pipe 2 (that is, the pipe axis direction of the relay pipe 4), skill is required for the cutting operation. The work efficiency will be slightly inferior. The tube cutting mark 22 may be a marker or a groove shape.

[Second Embodiment]
The foundation burying drain pipe 1B of the second embodiment will be described with reference to FIG. The drainage pipe 1B for foundation embedding according to the second embodiment has a configuration capable of extending the pipe length in the indoor direction. The description of the configuration common to the first embodiment is simplified or omitted.

  As shown in FIG. 3, in the foundation burying drainage pipe 1 </ b> B, a pipe addition drainage pipe 11 is connected to the indoor side pipe end of the sheath pipe 2 through a pipe addition socket 10. Further, a pipe addition drain pipe 13 is connected to the indoor pipe end of the relay pipe 4 via a pipe addition socket 12.

  More specifically, the tube end surface on the indoor side of the sheath tube 2 is formed at right angles to the tube axis direction of the indoor tube end portion 2B of the sheath tube 2. For this reason, general-purpose pipe addition sockets 10 having receiving ports at both ends can be mounted, and thereby the pipe addition drain pipe 11 can be connected. For this reason, by selecting the pipe connecting drain pipe 11 having an appropriate length, the pipe length of the foundation burying drain pipe 1B can be appropriately extended in the indoor direction.

  In addition, since the receptacle part of the same dimension is distribute | arranged to the both ends of this pipe extension socket 10, the outer diameter of the indoor side pipe end part 2B of this sheath pipe 2 and the outside of this pipe extension drain pipe 11 It is possible to align the diameter with the same dimension. For this reason, the external shape around the pipe connection socket 10 is a simple shape with little unevenness, and no useless space is generated in the under-floor space of the building.

  Similarly, in the relay pipe 4, since the pipe end surface on the indoor side of the relay pipe 4 is formed at right angles to the pipe axis direction of the relay pipe 4, a general-purpose pipe extension socket 12 is provided. It can be installed. And the pipe | tube extension drain pipe 13 is connected, and the extension to an indoor direction is possible. Further, since the receiving portions of the same size are arranged at both ends of the pipe connection socket 12, the external shape around the pipe connection socket 12 has a simple shape with less irregularities, and the additional part in the relay pipe 4 is provided. Is accommodated in the indoor side pipe end 2B of the sheath pipe 2 in a compact manner.

[Third embodiment]
A basic buried drain pipe 1C of the third embodiment will be described with reference to FIG. In addition, about the structure which is common in 1st Example and 2nd Example, description is simplified or abbreviate | omitted.

  As shown in FIG. 4, in the foundation burying drain pipe 1C, the indoor pipe end of the sheath pipe 50 extends upward at an angle of approximately 90 ° with respect to the horizontal plane. The indoor side pipe end face and the indoor side pipe end face of the inner pipe 60 open substantially vertically upward, and the outdoor side pipe end face of the sheath pipe 50 and the outdoor side pipe end face of the inner pipe 60 open substantially horizontally. Yes.

  Further, on the outer peripheral surface of the inner tube main body 61 of the inner tube 60 in the present embodiment, a plurality of annular convex portions 62 along the circumferential direction of the inner tube main body 61 are provided at intervals along the tube axis direction. . Specifically, the annular convex portion 62 is configured by an annular ring fitted in a concave groove formed on the outer peripheral surface of the inner tube main body 61. With such a configuration, the contact point between the sheath tube 50 and the inner tube 60 can be only the annular convex portion 62 when the inner tube 60 is detached, and the sheath tube 50 and the inner tube 60 are connected to each other. The frictional resistance generated between them can be reduced to facilitate the desorption work.

The present invention is not limited to the first to third embodiments, and can be appropriately changed in design without departing from the gist of the present invention.
For example, the inner pipes 3 and 60 may be known two-layer corrugated pipes.
Moreover, when connecting the inner pipes 3 and 60 and the indoor drain pipe, the inner pipes 3 and 60 and the indoor drain pipe may be directly connected without interposing the relay pipe 4.
Further, the indoor drainage facility may be a drainage basin, miscellaneous drainage pipe, toilet drainage pipe, or vertical gutter (roof drain pipe).

1A, 1B, 1C Drainage pipe for foundation burying 2, 50 Sheath pipe 2B Indoor side pipe end 3, 60 Inner pipe 4 Relay pipe 10, 12 Pipe extension socket 11, 13 Pipe extension drain pipe 21 Sheath pipe Side movement restricting part 22 Pipe cutting marks 31, 61 Inner pipe body (inner pipe body part)
32 Upstream receiving member (inner pipe end of the inner pipe)
34 Inner pipe side movement restriction part 100 Basics

Claims (7)

A sheath tube buried in the foundation of the building,
An inner pipe inserted from the indoor pipe end of the sheath pipe and disposed in the sheath pipe, and draining the waste water in the building to an outdoor drainage path;
A drainage pipe for foundation burial comprising
On the outer peripheral surface of the indoor side pipe end of the inner pipe, an inner pipe side movement restricting portion larger in diameter than the outer diameter of the inner pipe main body portion is provided,
The inner peripheral surface of the sheath tube is provided with a sheath tube side movement restricting portion smaller in diameter than the inner diameter of the indoor tube end of the sheath tube,
When the inner tube is disposed in the sheath tube,
The movement of the inner tube in the sheath tube is regulated in the outdoor direction at the position where the inner tube side movement restriction portion of the inner tube is in contact with the sheath tube side movement restriction portion of the sheath tube. Drainage pipe for foundation burial. The sheath tube has a bent tube-shaped sheath tube body portion and a straight tube-shaped indoor side tube end portion coupled to the sheath tube body portion,
The indoor side pipe end of the inner pipe is connected to the other end of the straight pipe-shaped relay pipe whose one end is connected to the indoor drain pipe in the building,
The relay pipe is arranged in the indoor side pipe end of the sheath pipe,
The sheath tube and the relay tube are made of a material harder than the inner tube main body,
The drain pipe for foundation embedding according to claim 1, wherein the indoor side pipe end portion of the sheath pipe and the relay pipe are freely cut. The drainage pipe for foundation embedding according to claim 2, wherein a pipe cutting mark indicating a cuttable range is provided on an outer peripheral surface of an indoor side pipe end portion of the sheath pipe. The indoor pipe end face of at least one of the sheath pipe and the relay pipe is formed at right angles to the indoor pipe end portion of the sheath pipe having the pipe end face or the pipe axial direction of the relay pipe. ,
The drainage pipe for foundation embedding according to claim 2 or 3, wherein a pipe end drainage pipe is connected to a pipe end having the pipe end face through a pipe addition socket. It is the length adjustment method of the drainage pipe for foundation embedding according to any one of claims 2 to 4,
A length adjusting method for a foundation burying drainage pipe, wherein the length of the foundation burying drainage pipe is adjusted by cutting the indoor pipe end of the sheath pipe and the relay pipe on the indoor side. When cutting the indoor side pipe end of the sheath pipe and the relay pipe,
About the sheath tube, cut along the direction perpendicular to the tube axis direction of the indoor side tube end of the sheath tube,
The method for adjusting the length of the drainage pipe for foundation embedding according to claim 5, wherein the relay pipe is cut in a direction orthogonal to the pipe axis direction of the relay pipe. It is the length adjustment method of the drainage pipe for foundation embedding according to any one of claims 2 to 4,
Forming at least one indoor side pipe end surface of the sheath pipe and the relay pipe at right angles to the indoor side pipe end portion of the sheath pipe having the pipe end face or the pipe axis direction of the relay pipe;
A method of adjusting the length of a drain pipe for foundation burying, characterized in that a pipe addition drain pipe is connected to a pipe end having the pipe end face via a pipe addition socket.