JP5437138B2 - Ground subsidence piping structure and ground subsidence piping method - Google Patents

Description

  The present invention relates to a ground settlement countermeasure piping structure and a ground settlement countermeasure piping method for discharging drainage from a building.

  Since the drainage pipe that drains the wastewater flowing from the building to the public fence is buried in the soil, there is a risk of detachment or damage due to uneven settlement of the ground. Therefore, various piping structures having a structure that follows uneven settlement of the ground have been proposed. For example, as shown in FIG. 13, an expansion joint that expands and contracts the entire length of a pipe by extrapolating one pipe into and out of the other pipe in a pipe extending in the outdoor direction from the building 101 and buried in the soil A piping structure 103 is shown in which 102a and 102b are provided in the vertical direction and the horizontal direction, respectively, and can cope with the vertical and horizontal components of uneven settlement (see Patent Document 1). As another example, a flexible pipe for buried in the soil is formed in a part of the pipe buried in the soil, and the deformation of the flexible pipe for buried in the earth follows the uneven settlement of the ground. It has been proposed to suppress the disconnection and breakage of the pipes embedded in the soil (see Patent Document 2).

Japanese Patent Application Laid-Open No. 07-248075 Utility Model Registration No. 3047714

  However, the piping structure 103 in which the expansion joints 102a and 102b are provided in the vertical direction and the horizontal direction, respectively, increases the material cost and the construction cost because the route of the pipe embedded in the soil is complicated. Installation is often difficult when it is necessary to flow water down a public pole, such as a drain pipe. In addition, since the vertical expansion joint 102a and the horizontal expansion joint 102b are arranged separately, for example, when each of the expansion joints 102a and 102b functions well when it sinks obliquely, It is difficult to cope with unequal subsidence in an oblique direction.

  On the other hand, flexible pipes for embedding in the soil are designed on the assumption that they are buried in the soil, so it is necessary to form a thick wall around the tube to withstand the weight of the soil, and are generally used on the ground. Since the flexibility is lower than that of the flexible pipe and the elasticity is low, it may not be able to sufficiently follow depending on the amount of ground subsidence.

  Therefore, an object of the present invention is to provide a ground subsidence countermeasure piping structure and a ground subsidence countermeasure piping method having high followability with respect to any displacement in a vertical direction, a horizontal direction, and an oblique direction.

  The ground subsidence countermeasure piping structure according to claim 1 is a ground subsidence countermeasure disposed between a drain pipe that is supported by a building and allows drainage to flow down, and a drainage basin embedded in the site of the building. A pipe structure, comprising: a first pipe communicating with the lower end of the drain pipe; and a second pipe communicating with the catchment tank, and one of the first pipe and the second pipe One tube is removably inserted into the other tube, and the first tube and / or the second tube are flexible.

  The subsidence countermeasure piping structure according to claim 2 is a drainage pipe that is supported by a building and allows drainage to flow down, a flexible pipe that has flexibility and communicates with a lower end of the drainage pipe, and the flexible pipe has one end. And a sheath pipe disposed in the soil having a strength higher than that of the flexible pipe, the other end of which is inserted so as to be freely accessible from the side and communicated with the water collecting basin.

  The ground subsidence countermeasure piping structure according to claim 3, wherein the drain pipe is arranged vertically along the outer wall of the building, and is a vertical rod that allows rainwater to flow, and has an elbow that curves to the lower end of the vertical rod. The flexible pipe communicates with each other through a gap.

  The ground subsidence countermeasure piping structure according to claim 4, wherein an end of one end side of the sheath pipe into which the flexible pipe is inserted is formed by being obliquely cut so that the upper side protrudes in the longitudinal direction. It is a feature.

  The ground subsidence countermeasure piping structure according to claim 5 is supported by the building, and has a drain pipe for flowing down drainage, one end communicating with the lower end of the drain pipe, and the other end in the ground outside the building. It is characterized by comprising an embedded sheath tube, and a flexible tube having one end inserted into the sheath tube so as to freely enter and exit, and the other end communicating with a water collecting tank provided in the soil.

  The subsidence countermeasure piping structure according to claim 6, wherein the drain pipe is arranged vertically along the outer wall of the building, and is a vertical rod that allows rainwater to flow, and has an elbow that is curved at the lower end of the vertical rod. The sheath tube communicates with each other.

  The ground subsidence countermeasure piping structure according to claim 7 is characterized in that a ring-shaped waterproof packing is externally fitted to an end portion of the flexible pipe inserted into the sheath pipe.

  The ground settlement countermeasure piping structure according to claim 8 is characterized in that the sheath pipe is transparent or translucent.

  The ground settlement countermeasure piping method according to claim 9 is a ground settlement countermeasure disposed between a drain pipe that is supported by a building and allows drainage to flow down, and a drainage basin embedded in the site of the building. A pipe structure, comprising: a first pipe communicating with the lower end of the drain pipe; and a second pipe communicating with the catchment tank, and one of the first pipe and the second pipe One tube is removably inserted into the other tube, and the first tube and / or the second tube are flexible.

  According to the ground settlement measures piping structure according to claim 1 and the ground settlement measures piping method according to claim 9, one of the first pipe communicating with the drain pipe and the second pipe communicating with the water collecting tank. Since the other pipe is removably inserted into the other pipe, the entire length of the piping structure can be extended by pulling out the other pipe from the one pipe. In addition, since the first tube and / or the second tube have flexibility, it is possible to follow uneven settlement by deforming the flexible tube. Thus, since the direction can be changed while extending the entire length, it is possible to follow any displacement in the vertical direction, the horizontal direction, and the oblique direction.

  According to the ground subsidence countermeasure piping structure according to claim 2, one end of the flexible pipe communicates with the lower end of the drain pipe, and the other end of the flexible pipe is inserted into the sheath pipe communicating with the water collecting basin. Therefore, when the catchment sinks due to uneven settlement, the sheath pipe sinks according to the sinking sink, and the flexible pipe is pulled out from the sheath pipe, thereby extending the overall length of the piping structure. At the same time, the flexible tube itself bends to follow the uneven settlement. Since this flexible pipe is inserted into a sheath pipe having a higher strength than that of the flexible pipe at the time of embedding, it is not necessary to withstand the weight of the soil, and a general flexible pipe that is not used in the soil can be used. Therefore, the ground subsidence countermeasure piping structure and the ground subsidence countermeasure piping method can use a general-purpose flexible pipe with a simple configuration, low cost and high flexibility, and can be used in any of a vertical direction, a horizontal direction, and an oblique direction. It also has a high follow-up performance with respect to the displacement.

  According to the subsidence piping structure according to claim 3, the drain pipe is a vertical shaft arranged substantially vertically along the outer wall of the building to allow rainwater to flow down, and the flexible pipe communicates with the curved elbow. Therefore, the buried pipe for rainwater and the lower end of the vertical shaft are not fixed, and it is possible to reduce bending of the vertical shaft due to uneven settlement of the ground. Moreover, since the flexible tube and the sheath tube are embedded below the ground, the design can be improved.

  According to the ground subsidence countermeasure piping structure according to claim 4, the end portion of the sheath tube to be extrapolated to the flexible tube is formed by being cut obliquely, and the upper side protrudes in the longitudinal direction. The upper end opening of the slab is not visible from the vertical direction and is open in the horizontal direction, so that even if a person gets on the ground and pressure is applied, the soil does not easily enter. Furthermore, because it is open on the building side, it is difficult to think of people getting into the opening and the narrow space on the building side, and it is almost limited to when earth pressure is applied from the opposite side to the opening side, so it is difficult for soil to enter .

  According to the ground subsidence countermeasure piping structure according to claim 5, the sheath pipe communicates with the lower end of the drain pipe, and the flexible pipe communicated with the water collecting tank is inserted into the sheath pipe so as to be freely accessible. When the catchment sinks due to the sinking, the flexible pipe is pulled out from the sheath tube following the sinking of the catchment. Further, it is possible to follow uneven settlement due to the flexibility of the flexible tube. Therefore, since the direction can be changed while extending the entire length, it is possible to follow any displacement in the vertical direction, the horizontal direction, and the oblique direction.

  According to the subsidence countermeasure piping structure according to claim 6, the drain pipe is a vertical pipe that allows rainwater to flow down, and the sheath pipe communicates with the lower end of the vertical pipe via an elbow. Since it is buried below the ground, the design can be improved.

  According to the subsidence countermeasure piping structure according to claim 7, since the ring-shaped waterproof packing is fitted on the end portion inserted into the sheath tube of the flexible tube, the water flowing down in the piping structure flows out. Can be prevented. Moreover, the inflow of earth and sand can be prevented from the clearance gap between a sheath pipe | tube and a flexible pipe | tube by fitting such a waterproof packing.

  According to the ground settlement countermeasure piping structure according to claim 8, since the sheath pipe is transparent or translucent, the length of the flexible pipe inserted into the inside of the sheath pipe can be confirmed from the outside. When the flexible tube is pulled out from the sheath tube by the above, it can be determined from the outside whether the flexible tube is not dropped from the sheath tube.

Sectional drawing which shows the whole structure of the ground subsidence countermeasure piping structure of 1st Embodiment. The A partial enlarged view of FIG. The figure which shows the state in which the catchment sunk in the ground settlement countermeasure piping structure of 1st Embodiment. The figure which shows the state which covered the clearance gap between a sheath pipe and a flexible pipe using the sealing member as a modification of 1st Embodiment. The B partial enlarged view of FIG. The figure which shows the example which used the flexible pipe for underground burial for a sheath pipe as a modification of 1st Embodiment. The figure which shows the modification which made the inner tube | pipe the inner tube | pipe with low flexibility as a modification of 1st Embodiment, and made the sheath tube the flexible tube for embedding in the soil. Sectional drawing which shows the whole structure of the ground settlement countermeasure piping structure of 2nd Embodiment. The C partial enlarged view of FIG. The figure which shows the state in which the catchment sunk in the ground settlement countermeasure piping structure of 2nd Embodiment. The figure which shows the example which used the flexible pipe for underground burial for a sheath pipe as a modification of 2nd Embodiment. The figure which shows the modification which made the inner tube | pipe the inner tube | pipe with low flexibility as a modification example of 2nd Embodiment, and made the sheath pipe | tube the underground flexible tube. The figure which shows an example of the conventional piping structure.

[First Embodiment]
Hereinafter, a first embodiment of a ground settlement countermeasure piping structure 1 and a ground settlement countermeasure piping method of the present invention will be described with reference to FIGS. 1 to 3. In this embodiment, the ground subsidence countermeasure piping structure 1 collects, for example, rain that has fallen on a roof (not shown) of a building 2 such as a house by an eaves fence (not shown) laid under the eave and vertically It is used for a rainwater drainage system that flows into a vertical culvert 3 laid in the direction and collects in a water collection basin 4 (rainwater basin) through a piping structure 1 buried in the ground. In addition, the ground subsidence countermeasure piping structure 1 and the ground subsidence countermeasure piping method of the present invention are not limited to those used in such a rainwater drainage system. For example, the sewage used inside the building 2 is allowed to flow. It can also be used in sewage drainage systems.

  The ground subsidence countermeasure piping structure 1 of this embodiment is fixed to the outer wall of the building 2 as shown in FIG. 1, and a vertical rod 3 as a drain pipe for flowing rainwater that has fallen on the roof, A tubular elbow 5 having one end inserted and fixed at the lower end, curved at the middle portion, a flexible tube 6a fixed to the other end of the elbow 5 and communicating with the vertical rod 3 through the elbow 5, and from one end side The flexible tube 6a is inserted in a freely removable manner, and the other end is fixed to a connecting pipe 7 that extends in a straight line, and a sheath pipe 8a that communicates with the catchment 4 through the connecting pipe 7 is provided. Yes.

  The vertical rod 3 is a tubular member made of resin or metal, and is formed in, for example, a cylindrical shape or a rectangular tube shape. The vertical rod 3 is held by a support ring 9 fixed to the outer wall of the building 2 and laid along the outer wall. The elbow 5 is made of, for example, resin or metal, and is bent at an intermediate portion by 45 degrees. The bending angle of the elbow 5 is not limited to 45 degrees, but may be bent at other angles. Moreover, as embodiment of the ground subsidence countermeasure piping structure 1 of this invention, the end of the flexible pipe 6a may be inserted and fixed as it is to the lower end of the vertical rod 3 without passing through the elbow 5.

  The flexible tube 6a is a resin or metal cylindrical tube having one end inserted into and fixed to the lower end of the elbow 5, and has flexibility. The side surface of the flexible tube 6a has a bellows shape or a spiral shape in order to exhibit flexibility. The shape of the flexible tube 6a is not limited to this, and may be other shapes as long as it has desired flexibility. As this flexible pipe 6a, a general flexible pipe piped on the ground in the building 2 can be used.

  The sheath tube 8a is a tube having a size that allows the flexible tube 6a to be inserted and removed freely, and is formed by bending a straight tube at approximately 45 degrees at the intermediate portion thereof. As shown in FIG. 2, the end of the sheath tube 8a on the side where the flexible tube 6a is inserted is cut obliquely so that the upper side protrudes sharply in the longitudinal direction. As a result, the opening of the end of the sheath tube 8a on the side where the flexible tube 6a is inserted is not visible from the vertical direction, but is open in the horizontal direction, so that a person gets on the ground and pressure is applied. But dirt is hard to penetrate. Furthermore, since it is open on the building 2 side, it is difficult to think of people getting in the narrow space on the opening and the building 2 side, and it is almost limited to the case where earth pressure is applied from the opposite side of the opening, so soil enters. Hard to do. Moreover, since the edge of the side where the flexible tube 6a of the sheath tube 8a is inserted is formed in an elliptical shape by being cut obliquely, the length of the circumference thereof is increased. The contact portion between the tube 6a and the edge of the sheath tube 8a is increased, the pressure on the contact portion is dispersed, the edge of the sheath tube 8a can be prevented from biting into the flexible tube 6a, and the flexible tube 6a is smooth. Exit. Furthermore, since the unevenness | corrugation formed in the outer periphery of the flexible tube 6a and the shape of the lower end of the edge of the sheath tube 8a do not correspond, the edge of the sheath tube 8a fits into the recess of the flexible tube and gets caught. Can be prevented. The sheath tube 8a can be formed by processing a straight tube formed of, for example, metal or resin, but is more preferably made of a transparent or translucent resin. When the sheath tube 8a is formed to be transparent or translucent, the length of the flexible tube 6a inserted inside can be confirmed from the outside simply by digging up the soil. In addition, it can be confirmed whether or not it is possible to cope with uneven settlement.

  The connecting pipe 7 fixed to the other end of the sheath pipe 8a is a straight pipe made of, for example, a resin, and is inclined so that the water that has flowed into the inside can flow up to the position where the water collecting tub 4 is installed. Is provided. This connecting pipe 7 penetrates the side surface of the water collecting basin 4 and guides rainwater into the water collecting basin 4, and a watertight formed by resin or rubber between the connecting pipe 7 and the water collecting basin 4. An annular member having the property is attached. By this annular member, the connecting pipe 7 can freely change the angle with respect to the water collecting trough 4 within a predetermined range.

  The drainage basin 4 collects rainwater flowing down in the piping structure of the present embodiment and discharges it to a public basin. The catchment basin 4 is not limited to such a stormwater basin, and may be a sewage basin that discharges sewage used in the building 2 to sewage through a public basin.

  When the ground subsidence prevention piping structure 1 and the ground subsidence prevention piping method configured as described above are used, for example, when the ground around the building 2 supported by the solid ground is sunk by pile driving or the like. Since the building 2 itself does not sink, the water collecting basin 4 installed on the soft ground compared to the building 2 sinks. At this time, as shown in FIG. 3, the connecting pipe 7 is pulled to the sink of the catchment 4, and the connecting pipe 7 sinks from the end of the catchment 4 and is pulled by the connecting pipe 7. The sheath tube 8a also sinks while tilting. On the other hand, the flexible tube 6a is not fixed to the sheath tube 8a, but is simply inserted in the sheath tube 8a so that the sheath tube 8a sinks while being inclined. It is pulled out from the inside of the sheath tube 8a while changing the shape according to the shape. As a result, the end of the flexible tube 6a on the elbow 5 side is not displaced, so that no load is applied to the vertical rod 3 to which the elbow 5 is fixed, and bending or breakage of the vertical rod 3 can be prevented. .

  As described above, the ground settlement countermeasure piping structure 1 and the ground settlement countermeasure piping method according to the first embodiment can change the overall length of the piping structure by allowing the flexible pipe 6a to freely enter and exit the sheath pipe 8a. In addition, since the flexible tube 6a is accommodated in the sheath tube 8a, the flexible tube 6a can be deformed in accordance with the unequal settlement direction, so that a large amount of settlement in various directions can be prevented. It can cope with equal settlement. In particular, since the flexible tube 6a is inserted into the sheath tube 8a having a higher strength than the flexible tube 6a, a general-purpose flexible tube that is not for soil use and has high flexibility can be used. Higher trackability.

  In the ground subsidence prevention piping structure 1 and the ground subsidence prevention piping method of the first embodiment, the shape of the end of the sheath tube 8a on the side where the flexible tube 6a is inserted projects sharply in the longitudinal direction. In this way, it is formed by cutting obliquely, thereby making it difficult for soil to enter, but the embodiment of the present invention is not limited to this. For example, as shown in FIGS. 4 and 5, a cylindrical sealing member 10 formed of a flexible resin is inserted into the flexible tube 6a with one end abutting on the outer periphery of the flexible tube 6a and the other end inserted into the sheath tube 8a. It may be fitted externally so as to abut on the end portion on the side. If comprised in this way, since the clearance gap between the sheath pipe 8a and the flexible pipe 6a is covered by the sealing member 10, it can prevent reliably that the surrounding soil penetrates into the clearance gap between the sheath pipe 8a and the flexible pipe 6a. .

  Moreover, in the ground settlement countermeasure piping structure 1 and the ground settlement countermeasure piping method of the first embodiment, the sheath pipe 8a is formed by bending a straight pipe, and the ground settlement countermeasure piping structure 1 and the ground are low-cost. Although the settlement countermeasure piping method can be realized, the embodiment of the present invention is not limited to this. For example, as shown in FIG. 6, a flexible tube for burying in the soil may be used as the sheath tube 8a. If comprised in this way, since the flexible pipe for embedding in the soil can also change according to the sinking of the catchment basin 4, even if the sinking amount of the catchment basin 4 becomes larger, it can follow this. it can.

  In the first embodiment, since the inner tube inserted into the sheath tube 8a is not directly subjected to earth pressure, the general-purpose flexible tube 6a that is not used in the soil and has low flexibility and high flexibility is used. However, the embodiment of the present invention is not limited to this, and as shown in FIG. 7, the sheath pipe 8a is buried in the soil. For example, an inner tube 6c formed by bending a straight tube may be used instead of the flexible tube 6a as an inner tube. That is, the inner pipe 6c communicates with the vertical rod 3 through the elbow 5, the sheath pipe 8a of the flexible pipe for embedding in the soil is extrapolated freely from one end side, and the other end of the sheath pipe is The structure connected to the water collecting tank 4 may be sufficient. Even in such a case, the subsidence is followed by the flexibility of the sheath tube 8a using the underground buried flexible tube and the stretchability of the inner tube 6c coming in and out of the sheath tube 8a. can do.

[Second Embodiment]
Next, the ground settlement countermeasure piping structure 1 and the ground settlement countermeasure piping method according to the second embodiment will be described with reference to FIGS. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. The ground subsidence countermeasure piping structure 1 according to the second embodiment is fixed to an outer wall of a house as shown in FIG. 8, and a vertical rod 3 as a drain pipe for flowing rainwater that has fallen on a roof, and the vertical rod 3 One end is inserted and fixed at the lower end of the tube, the tubular elbow 5 is curved at the middle portion, the sheath tube 8b is fixed to the other end of the elbow 5 and communicates with the vertical rod 3 through the elbow 5, and one end is A flexible pipe 6b which is inserted into the sheath pipe 8b so as to be freely inserted and removed, and is fixed to a connecting pipe 7 whose other end extends in a straight line, and which communicates with the water collecting trough 4 through the connecting pipe 7. Yes.

  The sheath tube 8b is a straight tube having a size that allows the flexible tube 6b to be inserted and removed freely. The sheath tube 8b can be formed by processing a straight tube made of, for example, metal or resin, but is more preferably made of a transparent or translucent resin. When the sheath tube 8b is formed to be transparent or translucent, the length of the flexible tube 6b inserted inside can be confirmed from the outside simply by digging up the soil. In addition, it can be confirmed whether or not it is possible to cope with uneven settlement.

  The flexible tube 6b is a flexible resin or metal cylindrical tube whose one end is removably inserted into the sheath tube 8b, and the other end is inserted into the connecting tube 7 and fixed. Yes. As shown in FIG. 9, a ring-shaped waterproof packing 11 is fitted on the end portion of the flexible tube 6b inserted into the sheath tube 8b, and when inserted into the sheath tube 8b, the sheath tube 8b. And the flexible pipe 6b can be sealed to prevent the water flowing down from the sheath pipe 8b through the flexible pipe 6b from leaking to the outside. The side surface of the flexible tube 6b is formed with a groove portion in a bellows shape or a spiral shape in order to exhibit flexibility. The shape of the flexible tube 6b is not limited to this, and may be any other shape as long as it has desired flexibility.

  When the ground subsidence countermeasure piping structure 1 and the ground subsidence countermeasure piping method according to the second embodiment configured as described above are used, when the catchment 4 sinks due to uneven settlement, as shown in FIG. The connecting pipe 7 is pulled by the sink of the catchment basin 4, the connecting pipe 7 sinks from the end of the catchment basin 4, and the flexible pipe 6b is pulled from the sheath pipe 8b by being pulled by the connecting pipe 7. While pulled out, it deforms to follow the settlement. On the other hand, the sheath tube 8b is not fixed to the flexible tube 6b, and the flexible tube 6b is merely inserted in the sheath tube 8b so that it can freely enter and exit. Further, no load is applied to the elbow 5 to which the sheath tube 8b is fixed and the vertical rod 3 to which the elbow 5 is fixed, and it is possible to prevent the vertical rod 3 from being bent or damaged.

  In addition, although the sheath pipe 8b in 2nd Embodiment is a straight pipe, it is not limited to this, As shown in FIG. 11, the thing using the flexible pipe for embedding in the soil may be used. If a flexible pipe for buried in the soil is used as the sheath pipe 8b, the structure becomes more flexible, so that it can have higher followability with respect to uneven settlement with a large amount of settlement.

  In the second embodiment, the flexible tube 6b is used as the inner tube. However, as shown in FIG. 12, an inner tube 6d formed by bending a straight tube may be used as the inner tube. Good. That is, the sheath pipe 8b of the flexible pipe for burying in the soil is communicated with the vertical rod 3 through the elbow 5, and one end side of the inner pipe 6d is removably inserted into the sheath pipe 8b, and the other end of the inner pipe 6d is inserted. May be configured to communicate with the catchment 4. Even in such a configuration, the subsidence is followed by the flexibility of the sheath tube 8b using the flexible tube for buried in the soil and the stretchability by moving the inner tube 6d out of the sheath tube 8b. can do.

  Needless to say, the embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the idea of the present invention.

  The ground subsidence countermeasure piping structure 1 and the unequal subsidence countermeasure piping method according to the present invention can be suitably used, for example, as a piping structure and a piping method in a rainwater drainage system of a house.

1 Ground subsidence countermeasure piping structure 2 Building 3 Vertical shaft (drainage pipe)
4 Water collecting trough 5 Elbow 6a, 6b Flexible pipe 8a, 8b Sheath pipe 11 Waterproof packing

Claims (9)

A ground subsidence piping structure arranged between a drain pipe that is supported by a building and allows drainage to flow down, and a drainage basin buried in the site of the building,
A first pipe communicating with the lower end of the drain pipe;
A second pipe communicating with the catchment basin,
Either one of the first tube and the second tube is inserted into the other tube so as to be freely accessible,
The subsidence countermeasure piping structure, wherein the first pipe and / or the second pipe have flexibility. A drain pipe that is supported by the building and allows the drainage to flow down;
A flexible tube having flexibility communicating with the lower end of the drain tube;
The flexible pipe is inserted so as to be freely accessible from one end side, and the other end is disposed in the soil having a higher strength than the flexible pipe communicating with the water collecting tank,
A subsidence piping structure characterized by comprising:   The drainage pipe is arranged vertically along the outer wall of the building, and is a vertical rod that allows rainwater to flow down. The flexible pipe communicates with an elbow curved at the lower end of the vertical wall. The ground settlement countermeasure piping structure according to claim 2.   The end portion of one end side of the sheath tube into which the flexible tube is inserted is formed by being cut obliquely so that the upper side protrudes in the longitudinal direction. Piping structure for ground settlement. A drain pipe that is supported by the building and allows the drainage to flow down;
A sheath pipe in which one end communicates with the lower end of the drain pipe and the other end is buried in the ground outdoors of the building;
A flexible pipe, one end of which is removably inserted into the sheath pipe and the other end communicates with a water collecting tank provided in the soil;
A subsidence piping structure characterized by comprising:   The drainage pipe is arranged vertically along the outer wall of the building, and is a vertical rod that allows rainwater to flow down, and the sheath pipe communicates with an elbow curved at the lower end of the vertical wall. The subsidence countermeasure piping structure according to claim 5.   The ground subsidence countermeasure piping structure according to claim 5 or 6, wherein a ring-shaped waterproof packing is fitted on an end portion of the flexible tube inserted into the sheath tube.   The ground subsidence countermeasure piping structure according to any one of claims 1 to 7, wherein the sheath pipe is transparent or translucent. A ground subsidence piping structure arranged between a drain pipe that is supported by a building and allows drainage to flow down, and a drainage basin buried in the site of the building,
A first pipe communicating with the lower end of the drain pipe;
A second pipe communicating with the catchment basin,
Either one of the first tube and the second tube is inserted into the other tube so as to be freely accessible,
The ground subsidence countermeasure piping method, wherein the first pipe and / or the second pipe have flexibility.

Images