JP4891047B2 - Construction structure of drain pipe - Google Patents

Description

The present invention relates to a construction structure of the drainage tube using the drainage pipe kit.

  Conventionally, in the detached house field, drainage from drainage equipment such as toilets, vanity tables, bathrooms, etc. flows into the drainage mass provided in the nearest outdoor residential land, and then flows into this drainage mass and then downstream. After going through the drainage mass, it is finally collected in the public mass and drained to the main sewer.

  The drainage pipe connecting each drainage device and drainage mass passes through the foundation concrete layer that forms the foundation of the building such as moisture-proof concrete and concrete slab formed under the floor directly below each device, and then reaches the drainage mass. It has become. In the through portion of the concrete layer, the drain pipe is completely embedded in the concrete layer so that the drain pipe is completely covered with concrete. The above is the conventional general drain pipe piping method. However, with such a method, the evaluation criteria of the “Housing Quality Assurance Promotion Act” in June 2000 can no longer be satisfied.

  Therefore, in order to cope with this, for example, in the piping structure of the drainage pipe of the building disclosed in Patent Document 1 below, the “sheath pipe” has openings in the foundation concrete layer and below the floor and in the formation outside the concrete layer. And a flexible pipe joint is inserted into the sheath pipe, and a drain pipe connected to an indoor drainage device is connected to one end of the flexible pipe joint on the side projecting to the floor under the sheath pipe. And the other end of the flexible pipe joint is connected to a drain pipe connected to the drain mass.

  Among the above, the “sheath pipe” has a curved portion to prevent interference with the reinforcement in the concrete layer when it is installed in the foundation concrete layer to which it is generally applied. It is used a lot. That is, there is a curved portion through a horizontal straight portion, and a shape having a rising straight portion passing through the curved portion and heading in a direction obliquely upward 45 degrees to 90 degrees with respect to the original horizontal portion.

And, on-site housing makers and housing contractors who use these “sheath pipes” and flexible pipe joints can be installed without cutting the reinforcement in the foundation concrete layer as much as possible, thereby improving the strength of the foundation concrete layer. Costs can be reduced by securing and reducing reinforcing bars, and the “rise height” of the sheath pipe from the upper surface of the foundation concrete layer under the floor can be made as low as possible, thereby reducing the horizontal pulling height of the pipe under the floor. We want something that can be lowered so that it does not interfere with maintenance and repair of underfloor piping.
JP 2002-294781 A

  However, the structure of the foundation concrete layer under the floor currently used is various, and the “sheath pipe” that can satisfy the above-mentioned requirements corresponding to each foundation concrete layer and the flexible tube associated therewith. If you try to line up the joints, the variety will be huge.

Therefore, the object of the present invention is to provide a lineup of “sheath pipes” and flexible pipe joints that can be installed without cutting the reinforcement of the foundation concrete layer as much as possible, and the rising height under the floor can be kept as low as possible. The purpose is to provide a drainage pipe construction structure that uses a standard drainage pipe kit that can be applied to various types of concrete foundations without increasing the amount of steel.

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a rising straight line portion that is embedded in a concrete layer placed under a floor of a building and that faces a floor side through a straight part facing the geological layer side and a curved part connected thereto. A drainage pipe construction structure using a drainage pipe kit comprising a sheath pipe composed of a flexible pipe joint inserted into the sheath pipe and having pipe connection portions at both ends of the flexible part,
The axial length of the flexible pipe joint is
The rather long than plus the length of the sum of the axial length of the pipe connection part of the both ends all the length of the maximum curvature radius curve of the curved portion of the sheath tube,
The axial length of the straight portion facing the formation side of the remaining sheath after cutting off the portion protruding from the concrete layer, the arc length of the maximum curvature radius curve of the curved portion, and the maximum curvature radius of the rising straight portion A structure shorter than the total length of the half of the length from the position connected to the curve to the position intersecting the upper surface of the concrete layer was adopted.

By defining the axial length of the flexible pipe joint as described above, the curved portion of the flexible pipe joint has a curved shape similar to the curved portion of the sheath, and the flexible pipe joint can easily follow the sheath pipe. Furthermore, by defining the maximum length of the flexible pipe joint as described above, it is easy to perform horizontal pulling of the drain pipe below the floor without the pipe connection portion of the flexible pipe joint protruding greatly from the upper surface of the concrete layer. Become.

  Next, in the invention according to claim 2, in the invention according to claim 1, the sheath tube has a curved portion so that the straight portions on both sides form an angle of 45 degrees to 90 degrees, and on the outdoor side. When the straight portions facing each other are horizontally arranged, the horizontal distance between both ends is 500 mm or more and 700 mm or less, and the vertical distance is 230 mm or more and 350 mm or less.

  If the horizontal distance of the sheath pipe is as described above, the rising position of the sheath pipe under the floor is not too far from the boundary position with the outdoor side, and if the vertical distance of the sheath pipe is as described above, the bottom floor side and the outdoor side It is possible to secure a height that allows penetration between the two.

  The “horizontal distance” is a perpendicular line passing through the start end of the linear portion facing the outdoor side when the linear portion facing the outdoor side is horizontally disposed as shown in the section of the embodiment described later. Refers to the distance between the vertical line passing through the end of the rising straight part facing the floor and the "vertical distance" refers to the horizontal line along the bottom of the horizontal straight line facing the outdoor side and the rising straight line facing the floor This is the distance between the horizontal line passing through the end face of the part. For details, refer to the description and figures in the embodiment section.

The invention according to claim 3 is a construction structure of the exhaust water tube according to claim 1 or 2,
Axial length of the flexible portion of the front Symbol flexible pipe joint,
The curved portion of the remaining of the sheath tube, before Symbol axial length of the straight portion facing the front Symbol formation side in the axial length of the curved portion, or prior Symbol elevational rising linear portion was cut and removed portion protruding from the concrete layer Longer than the shorter one of the axial lengths from the position continuous to the position intersecting the upper surface of the concrete layer ,
A configuration in which the axial length from the end face of the straight portion facing the formation layer side of the sheath pipe to the position where it first intersects the upper surface of the concrete layer is adopted is adopted.

  Since it did in this way, a flexible pipe joint can be pulled out easily from a sheath pipe, and since the flexible part of a flexible pipe joint fits in a sheath pipe, it becomes easy to take a piping gradient.

  In the present invention, the length of the flexible pipe joint is set as described above with respect to the length of the sheath pipe before cutting, so that the curved portion of the flexible pipe joint is the same as the curved portion of the sheath pipe. By making the flexible pipe joint easy to follow the sheath pipe and setting the length of the flexible pipe joint so that the sheath pipe is set to the longest specification and combining them. In addition, there is an effect that a combination of a “sheath pipe” and a flexible pipe joint that can correspond to the basic form of any house maker is possible.

Further, with respect to various forms of foundation concrete layer of underfloor buildings, now rising height is kept low at the floor of the flexible pipe joint, since the pipe gradient is easily taken, underfloor inspection and pipe repair It is easy to get over the pipe when entering the floor at the time, and it is possible to improve the efficiency of inspection and repair work.

Furthermore, according to the construction structure of the drain pipe of claim 3 of the present invention, the flexible pipe joint is replaced with the sheath pipe when the flexible pipe joint is pulled out from the sheath pipe and renewed at the time of inspection and repair after completion of the piping. It can be easily pulled out without any problems.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Combination of "Saya tube" and flexible pipe joint)
First, FIG. 1 (a), (b) shows the basic shape of the "sheath pipe 10" of this invention, and has the curved part 1 in order to prevent interference with the reinforcement in the foundation concrete layer C. FIG. It has a “rising straight line portion 3” that rises from the horizontal straight line portion 2 through the curved portion 1 with respect to the original horizontal straight line portion 2. FIG. 1A shows a case where the rising angle is 45 degrees, and FIG. 1B shows a case where the rising angle is 90 degrees. FIG. 1C schematically shows a state where the “sheath pipe 10” shown in FIG. 1A is embedded in a foundation concrete layer C (hereinafter referred to as a concrete layer C) of a building, The horizontal straight line portion 2 is the side facing the formation E side, and the rising straight line portion 3 is the side facing the floor B below the building.

  The sheath tube 10 protrudes from the planned boundary position between the concrete layer C and the stratum E so that the entire sheath tube 10 is not buried in the concrete layer C before or after placing the concrete. Similarly, the rising straight portion 3 is also arranged so as to protrude from the position of the upper surface of the concrete on the floor B side, but after placing the concrete, as shown in FIG. The portion protruding from the layer C is cut at the boundary with the concrete layer C.

  By cutting the sheath tube 10, it is possible to arrange the concrete layer C in consideration of positioning with the reinforcing bar. Thus, since the sheath pipe | tube 10 is cut | disconnected after concrete placement, it is formed with resin which is easy to cut | disconnect. Specifically, synthetic resins such as polyvinyl chloride and polyethylene are used.

  Here, as the length of the sheath tube 10 before cutting, there are good fit in the concrete layer C and a rising position on the lower floor B side (a position where the rising straight portion 3 protrudes from the upper surface of the concrete layer C). In order to adjust the horizontal straight line 2 so as not to be too far away from the starting end (boundary position with the formation E), the maximum horizontal distance is preferably within 700 mm. In the present invention, the “horizontal distance” means the horizontal distance that faces the formation E when the horizontal straight line portion 2 that faces the formation E side is horizontally arranged as shown in FIG. It means the distance between the perpendicular line passing through the start end of the straight line part 2 and the perpendicular line passing through the end of the rising straight line part 3 facing the floor B (the end is the position marked with the reference numeral 3e). This horizontal distance is indicated by a symbol H in FIG.

  On the other hand, the minimum “horizontal distance H” can be adjusted by cutting the horizontal straight portion 2 of the sheath 10 at the boundary with the formation E. Considering the correspondence, in order to obtain the effect of the present invention, the thickness is preferably 500 mm or more.

  Moreover, in this invention, since the sheath pipe | tube 10 needs to ensure the height required in order to penetrate the concrete layer C from the basement E side to the underfloor B side, it is suitable for the sheath pipe | tube 10 before a cutting | disconnection. A “vertical distance” (indicated by the reference symbol V in FIG. 1 (e)) is also defined, and as shown in FIG. 1 (e), a horizontal line along the bottom of the horizontal straight portion 2 facing the formation E side The distance from the horizontal line passing through the end face of the rising straight portion 3 facing the under-floor B side is preferably the minimum of 230 mm or more and the maximum of 350 mm or less.

  More preferably, it is 270 mm or more and 300 mm or less, and in that case, there is a balance between expansion of the corresponding range to various forms of the foundation concrete layer C and suppression of generation of unnecessary cutting portions of the sheath tube 10. It becomes a dimension.

  Next, as shown in FIG. 2 (a), the flexible pipe joint 20 has pipe connection parts 12 connected to the ends of a normal drain pipe at both ends of the flexible part 11, and this pipe connection part. The material of 12 is preferably the same material as the drain pipe. The material of the flexible portion 11 is not particularly limited as long as it has flexibility. For example, synthetic resin such as vinyl chloride resin or polyethylene resin can be cited. It is preferable to use a layer corrugated tube.

  The length of the flexible pipe joint 20 includes good fit in the sheath pipe 10 and the rising height of the flexible pipe joint 20 on the underfloor B side after the sheath pipe 10 is cut (concrete layer). Since it is necessary to keep the height protruding from the upper surface of C low, it is desirable that the length be as short as possible. However, the minimum length is still the sheath tube 10 before cutting or the sheath tube after cutting (hereinafter referred to as “cutting”) , 100 and the sheath 100 after cutting are distinguished from those before cutting), the length of the following relationship is required.

  First, “the good fit in the sheath tube 10 (and the sheath tube 100 after cutting)” of the flexible tube joint 20 is, in other words, the flexible portion 11 in the curved portion 1 of the sheath tube 10 (100). Is having a shape similar to the curved shape of the sheath 10 (100).

As the axial length of the flexible pipe joint 20 for that purpose, in the present invention, as shown in FIG. 2B, the axis of the pipe connecting portion 12 is set to the full length of the maximum curvature radius curve 1a of the bending portion 1 of the sheath tube 10. It is longer than a length obtained by adding twice the length 12a. By doing so, the bending portion of the flexible pipe joint 20, that is, the axial length of the flexible portion 11 is surely longer than the axial length of the bending portion 1 of the sheath 10, so that the flexible pipe joint 20 is attached to the sheath 10. It becomes easier to follow. The same applies to the sheath 100 after cutting.

On the other hand, the maximum length is defined as follows . When performing the adhesive bond between the sheath pipe 100 in the variable Shiwakan joint 20, and when considering the performed ease of adhesive application, possibly flexible tube joint 20 is repelled by the flexibility of the flexible portion 11 Thus, in order to improve the fact that the pipe connection portion 12 becomes difficult to follow the sheath 100 after cutting, there is a case where a certain length is required from the length of the bending portion 1. In order to effectively obtain the effect, the maximum length of the flexible pipe joint 20 is as shown in FIG. 2 (c), the horizontal straight portion 2 of the sheath 100 after cutting (the straight portion facing the formation E side). in the axial arc length of maximum curvature radius curves 1a of the curved portion 1 added), and further, (facing the floor B side) side connected to the maximum curvature radius curves 1a rising linear portion 3 of the floor B of the concrete layer C Half of the length until crossing the top surface (indicated by reference numeral 3b in FIG. 2 (c)) It is assumed that was added.

  In this way, as shown in FIG. 3 (a), even when the amount of cutting of the sheath tube 10 is small and the sheath tube 100 is installed for the longest time, the flexible pipe joint 20 can be As shown in FIG. 4, since a part of the pipe connecting portion 12 only protrudes from the upper surface of the concrete layer C under the floor B, it becomes easy to perform horizontal drainage of the drain pipe at that position. Accordingly, since the height of the pipe on the upper surface of the concrete layer C is lowered, it is easy to get over the pipe when entering the underfloor B for inspection, and the inspection work becomes easy.

  In addition, when the sheath 100 after being cut is installed in the shortest length, when the pipe connection part 12 of the flexible pipe joint 20 can be exposed to the formation E as an installation condition, FIG. It can be installed in the form as shown in.

  When the drained pipe is constructed by disposing the cut-off sheath pipe 100 having the above length relationship and the flexible pipe joint 20 inserted therethrough, for waterproofing from the outdoors, FIG. As shown in (b), the gap between the inner peripheral surface and the outer peripheral surface of the flexible pipe joint 20 at the position of the formation E side end portion of the horizontal straight portion 2 of the sheath 100 after cutting, For example, a rubber annular sealing material is used for closing, and a waterproof silicone resin sealing material P is filled from the end face of the rising straight portion 3 on the underfloor B side, or the outer peripheral surface of the flexible pipe joint 20 A foamed polyethylene sheet Q is wrapped around the core, and after filling the gap between the cut sheath 100 and the inner peripheral surface of the sheath 100, a waterproof silicone resin sealing material or mortar is provided from both ends of the sheath 100 after the cut. It is preferable to perform construction such as filling with R

Next, an embodiment of the invention of the construction structure of a drain pipe according to claim 3 using the sheath pipe 100 and the flexible pipe joint 20 after cutting will be described. The present invention makes it easy to pull out the flexible pipe joint 20 from the sheath 100 after cutting when the flexible pipe joint 20 is renewed at the time of pipe repair or inspection. It is for the purpose. Therefore, as an embodiment of the present invention, the relationship between the length of the sheath 100 after cutting and the length of the flexible joint 20 is defined as follows.

That is, as shown in FIG. 4, the axial length of the flexible portion 11 of the flexible pipe joint 20 is denoted by the symbol 1b in the axial length of the bent portion 1 of the sheath 100 after cutting (FIG. 4 (a)). The axial length of the horizontal straight portion 2 (the side facing the formation E) of the sheath 100 after cutting, or the rising straight portion 3 (indicated by reference numeral 2a in FIG. 4 (a)) After cutting, the axial length until it intersects the upper surface of the concrete layer C on the side facing the floor B (3a in FIG. 4 (a)), whichever is shorter, is longer From the axial length of the sheath 100 from the end face on the formation E side of the pipe 100 until it first intersects with the upper surface of the concrete layer C (the boundary surface with the floor B below) (labeled 1c in FIG. 4 (b)) Try to be short.

  This is because if the flexible pipe joint 20 is not exposed from either end surface of the sheath 100 after cutting, the drain pipe connected to the pipe connection portion 12 of the flexible pipe joint 20 cannot be cut. As shown in FIG. 5 (a), if the drain pipe 30 remains in the pipe connecting portion 12, the pipe connecting portion 12 is replaced with the bent portion 1 of the sheath 100 after being cut. This is because 20 cannot be pulled out from the sheath 100 after cutting, and by setting the axial length of the flexible portion 11 of the flexible pipe joint 20 as described above, as shown in FIG. After securing the length that the pipe connection part 12 is exposed to the end face of the horizontal straight part 2 facing the formation E side of the sheath 100 (the boundary between the formation E and the concrete layer C) and the drain pipe 30 can be cut, Easily pulling the flexible pipe joint 20 from the sheath 100 after cutting In which it was to be able to.

  According to the present invention, in the drainage pipe structure, a standard specification of a combination of a “sheath pipe” disposed in a foundation concrete layer under the floor of a building and a flexible pipe joint inserted therethrough is provided.

(A) shows the sheath before embedding the concrete layer, (b) shows that both straight portions of (a) form an angle of 90 degrees, and (c) shows the sheath tube buried in the concrete layer. The state is shown schematically in (d) of a sheath tube obtained by cutting a portion protruding from the concrete layer after placing the concrete, and (e) in which the sheath tube is dimensioned. (A) schematically shows the flexible pipe joint, (b) shows the contents defining the minimum length of the flexible pipe joint, and (c) shows the contents defining the maximum length of the flexible pipe joint. It is shown. (A) schematically shows the case where the sheath pipe is installed for the longest, (b) shows the horizontal pulling state of the drain pipe, and (c) shows the inside of the concrete layer when the sheath pipe is installed the shortest. It shows the form of embedment. The figure for demonstrating the relationship between the axial length of a flexible part of a flexible pipe joint, and the dimension and dimension of a pipe | tube to (a) and (b) is shown. (A) shows a state where the pipe connection part is replaced with the curved part of the sheath and the flexible pipe joint cannot be pulled out from the sheath pipe, and (b) shows that the pipe connection part is placed on the formation side of the sheath pipe. The state which ensures the length which can be exposed to the end surface of the horizontal straight part which faces and can cut | disconnect a drain pipe is shown typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Curved part 1a Maximum curvature-radius curve 1b Axle length of curved part 1c Axle length after sheath pipe is first intersected with upper surface of concrete surface under the floor from horizontal boundary 2 Horizontal linear part 2a Horizontal linear part axial length 3 rising straight part 3a rising straight part axial length 3e end of rising straight part 10 sheath tube (before cutting projecting part from concrete layer)
DESCRIPTION OF SYMBOLS 11 Flexible part 12 Piping connection part 20 Flexible pipe joint 30 Drain pipe 100 Saddle pipe after cutting C Concrete layer E Ground layer B Under floor

Claims (3)

A sheath pipe that is embedded in a concrete layer placed under the floor of the building and that has a straight portion facing the formation layer and a rising straight portion facing the floor side through a curved portion connected to it, and is inserted into the sheath tube to be flexible. A drainage pipe construction structure using a drainage pipe kit comprising a flexible pipe joint provided with pipe connection portions at both ends of the part,
The axial length of the flexible pipe joint is
The rather long than plus the length of the sum of the axial length of the pipe connection part of the both ends all the length of the maximum curvature radius curve of the curved portion of the sheath tube,
The axial length of the straight portion facing the formation side of the remaining sheath after cutting off the portion protruding from the concrete layer, the arc length of the maximum curvature radius curve of the curved portion, and the maximum curvature radius of the rising straight portion A drainage pipe construction structure characterized by being shorter than a total length of a half of a length from a position connected to a curve to a position intersecting with an upper surface of the concrete layer. The construction structure of the drain pipe according to claim 1,
Prior Symbol sheath tube, when the straight portions on both sides has a curved portion at an angle of 45 degrees to 90 degrees, were provided with straight portions facing the front Symbol stratum side horizontally, the horizontal distance across 500mm As described above, a drainage pipe construction structure characterized by being 700 mm or less and a vertical distance of 230 mm or more and 350 mm or less. A construction structure of the exhaust water tube according to claim 1 or 2,
Axial length of the flexible portion of the front Symbol flexible pipe joint,
The curved portion of the remaining of the sheath tube, before Symbol axial length of the straight portion facing the front Symbol formation side in the axial length of the curved portion, or prior Symbol elevational rising linear portion was cut and removed portion protruding from the concrete layer Longer than the shorter one of the axial lengths from the position continuous to the position intersecting the upper surface of the concrete layer ,
Construction structure of the drainage pipe, wherein first the shorter axial length of the position to which intersects the top surface of the concrete layer, it from the end face of the linear portion facing the formation side of the sheath tube.

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