JP4335698B2 - Drain material and manufacturing method thereof - Google Patents

Description

  The present invention relates to a drain material for discharging surplus water and the like from the ground and a method for producing the same.

  Conventionally, in order to discharge underground surplus water and stabilize the ground, a drain material having a large number of water holes and buried in the ground has been widely used. This drain material is required to have both sufficient strength to withstand earth pressure and good drainage. As such a drain material, for example, a perforated pipe having a large number of water passage holes formed on the pipe wall and a gap that covers the outside of the perforated pipe and has water permeability, elasticity, and strength against earth pressure. The thing provided with the material is proposed (for example, refer patent document 1).

  A drain material having a filtration layer formed by heat-sealing a web made of heat-adhesive conjugate fibers has also been proposed (see, for example, Patent Document 2). The fineness of the heat-adhesive conjugate fiber of the filtration layer is a fineness (10 to 100 dtex) that can ensure sufficient strength against earth pressure and good water permeability.

JP 2000-336636 A JP 2002-332630 A

  However, the drain materials proposed in the past as described in Patent Documents 1 and 2 are buried in the ground by once digging up the ground, then installing the drain material, and then backfilling again. Therefore, it will damage the surrounding landscape, and it will be a large-scale construction, which is disadvantageous in terms of construction costs. If such a drain material is to be installed in the ground without digging up the ground, a method of inserting it into a drilling hole formed in the ground in advance and having substantially the same diameter as the drain material is conceivable. However, in that case, the drain material needs to have a considerably large rigidity, and the drain material having such a high rigidity is very poor in handling during transportation and construction.

  Moreover, since the drain material is mainly composed of one tubular body, the conventional drain material has a limit in increasing the strength against earth pressure. In particular, when a large earth pressure acts on the drain material, such as when the drain material is buried deep in the ground, the drain material may be crushed by the earth pressure, and the assumed drainage function may not be exhibited. There is.

In addition, after the drain material is installed in the ground, as time passes, the drainage function of the drain material is reduced due to clogging of the drain holes of the drain material due to fine particles of the soil. In such a case, with the conventional drain material, it is necessary to replace the drain material clogged up by excavating the ground again with a new one, or to newly bury the drain material in another position, and to perform the drainage function. The cost for the work for recovery will increase.
Furthermore, in the drain material described in Patent Document 1, since the gap material is interposed between the perforated pipe and the ground, the perforated pipe is not in close contact with the ground, and the surplus in the ground Since it becomes difficult for water to flow into the perforated pipe, drainage is poor.

  An object of the present invention is to provide a drain material that can be installed in the ground without digging up the ground and has both sufficient strength against earth pressure and a good discharge function such as excess water, It is an object of the present invention to provide a drain material that can easily recover a discharge function that has been lowered due to clogging after being installed therein.

Means for Solving the Problems and Effects of the Invention

Drain material of the first invention, a tubular body which is folded to have a flexible and flat, is disposed along the outer periphery of the cylindrical body, a large number of through holes are formed in the tube wall and the coercive It has a composite tubular body provided with a plurality of tubular bodies having formability, and a linear body wound along the outer surface of the composite tubular body.

  This drain material is placed along the outer periphery of the cylindrical body by inflating the cylindrical body by injecting a filler such as mortar into the cylindrical body located on the innermost side while installed in the ground. The plurality of tubular bodies can be pressed against the soil so that excess water, gas, etc. in the soil can flow into the tubular body from a large number of through holes and be discharged to the outside. In addition, each of the plurality of tubular bodies has a shape retaining property, and since the plurality of tubular bodies are bundled and integrated by a linear body, the drain material having the same diameter is constituted by one tube. Compared with the case where it is, the drain material of this invention is equipped with higher intensity | strength with respect to earth pressure. In addition, handling during storage and transportation becomes easy. The linear body is not limited to a long one wound around the outer periphery of the composite tubular body, but is a ring-shaped linear body such as a rubber band wound only once (one turn). Can also be used.

  Furthermore, since the cylindrical body located at the innermost side has flexibility, the cylindrical body does not have shape retention before the filler is injected into the cylindrical body, and the state where the filler is injected In comparison, the diameter of the entire drain material is small. Therefore, a hole having a diameter substantially the same as the diameter of the drain material when the filler is injected into the ground is formed in advance, and before the filler is injected into the hole (the cylindrical body expands). By inserting a drain material having a diameter smaller than the diameter of the hole, the drain material can be easily installed in the ground. And after that, a filler can be inject | poured into a cylindrical body, a drain material can be expanded, and a drain material can be stuck to the inner wall of a hole. Therefore, compared with the conventional case where the drain material is dug up and the drain material is installed in the ground, the construction is not large-scale, the drain material is easily installed, and the surrounding landscape is further improved. Construction that does not lose as much as possible becomes possible.

  In addition, since the drain material includes a plurality of tubular bodies having a large number of through holes, even if the through hole or the inside of one tubular body is clogged, the drain material can be underground from the through holes of other tubular bodies. Excess water can be discharged. Furthermore, by pouring high-pressure water or the like into other unclogged tubular bodies, the surface of the tubular body and the cake layer formed inside can be destroyed, and slime, soil particles, etc. can be discharged outside the tubular body. Therefore, the discharge function can be easily recovered.

  Further, by extracting one of the tubular body or the plurality of tubular bodies from the state in which the filler is injected into the tubular body and the plurality of tubular bodies are in close contact with the soil, Since the diameter of the material is reduced, the drain material whose function of discharging excess water or the like is reduced due to clogging can be easily extracted from the ground, and the drain material can be easily replaced.

Drain material of the second invention comprises a tubular body which is folded to have a flexible and flat, is disposed along the outer periphery of the cylindrical body, a large number of through holes are formed in the tube wall and the coercive A composite tubular body including a plurality of tubular bodies having formability, a cylindrical cover member that covers an outer surface of the composite tubular body, and a linear body that is wound along the outer surface of the cover member It is characterized by this. That is, the drain material of the second invention is further provided with a cylindrical cover member that covers the outer surface of the composite tubular body as compared with the drain material of the first invention. Therefore, the cover member has a structure in which the plurality of tubular bodies having shape retention properties are more reliably restrained, and thus the strength of the drain material against the earth pressure is further improved. When the cylinder is filled with a filler such as mortar while the drain material is installed in the ground, the drain material expands into a circular cross section by the cover member, and the drain material is drained into the hole formed in the ground. Since the materials are in close contact, the inner wall of the hole can be prevented from collapsing. Furthermore, surplus water etc. can be discharged | emitted also from the space formed between a some tubular body and a cover member, and it is excellent in the discharge function.

  The drain material of the third invention is characterized in that, in the second invention, the cover member is a tubular woven fabric. By making the cover member covering the composite tubular body into a tubular woven fabric, it is possible to uniformly filter excess water or the like flowing from the soil into the plurality of tubular bodies. In addition, it is possible to freely set the fineness of the filtration layer formed of the cover member in accordance with the filtration particles of the soil where the drain material such as sandy soil and viscous soil is installed.

  The drain material according to a fourth invention is characterized in that, in any one of the first to third inventions, the tubular body is made of a flexible material. By constructing the tubular body with a flexible material such as synthetic resin, the drain material can be stored or transported in a state of being wound on a reel or the like with a relatively large radius of curvature, and handling is easy. is there. Moreover, it can be easily carried into a narrow construction site such as the inside of a vertical shaft, and the degree of freedom of construction site selection is increased.

  The drain material according to a fifth invention is characterized in that, in any one of the first to fourth inventions, the tubular body is a tubular woven fabric woven with warps and rigid wefts. It is. Therefore, the strength against the earth pressure of the tubular body is further increased. In addition, it is possible to roughen the eyes of the tubular woven fabric in order to prevent clogging of the through-holes while ensuring sufficient strength against earth pressure.

  A drain material according to a sixth aspect of the present invention is the drain material according to any one of the first to fifth aspects, wherein the linear body has easy cutting properties or stretchability. Therefore, after the drain material is installed in the ground, when the filler is injected into the cylindrical body and the cylindrical body swells, the plurality of tubular bodies positioned outside the cylindrical body are in the radial direction of the cylindrical body. Moving to the outside, the drain material has an increased outer diameter, but because the linear body has easy cutting properties or stretchability, when the cylindrical body expands, the linear body that restrains the composite tubular body is cut, Or a linear body expand | extends and a some tubular body comes to closely_contact | adhere to soil reliably.

  According to a seventh aspect of the present invention, there is provided a drain material manufacturing method comprising a plurality of through holes in a wall portion on the outer peripheral side of one or a plurality of cylindrical bodies that are flexible and folded in a flat shape, and have shape retention. A plurality of tubular bodies are arranged to form a composite tubular body, the composite tubular body is inserted into an annular loom, and a tubular woven fabric is woven by the annular loom so as to cover the outer surface of the composite tubular body. The linear body is wound along the outer surface of the tubular fabric while simultaneously feeding the tubular body and the tubular fabric from the annular loom.

  Accordingly, the tubular fabric covering the outer surface of the composite tubular body is woven by the annular loom, and the linear member is wound along the outer surface of the woven tubular fabric to continuously produce the drain material. Therefore, the manufacturing process of the drain material can be simplified and the manufacturing cost can be reduced. Further, it is possible to easily manufacture a long drain material that can be integrally expanded outward in the radial direction of the cylindrical body. Furthermore, it is also possible to easily change the type of the tubular body and the cylindrical fabric covering the tubular body (for example, the roughness of the weave, the type of yarn to be configured, etc.) according to the place of use.

  Embodiments of the present invention will be described. This embodiment is an example in which the present invention is applied to a drain material that is installed in the ground and drains excess water from the soil.

  As shown in FIG. 1, the drain material 1 has a flexible tubular body 2 into which mortar 21 (filler: see FIG. 7) is injected, and is disposed outside the tubular body 2. A composite tubular body 4 having six tubular bodies 3 in which a large number of through-holes 3a are formed in the wall, a cover member 5 covering the outer surface of the composite tubular body 4, and winding along the outer surface of the cover member 5 The linear body 6 is provided.

  The cylindrical body 2 is made of polypropylene 760d / 2 pieces × 13 pieces / cm as warp yarns and polypropylene 760d / 2 pieces × 7.5 pieces / cm pieces as weft yarns. These warps and weft yarns are woven into a hose shape having a diameter of 50 mm. A cylindrical woven fabric.

  The tubular body 3 is composed of a tube made of synthetic resin. The tube wall of the tubular body 3 is formed in a mesh shape, and a large number of through holes 3a are formed in the mesh-shaped tube wall. Yes. The diameter of the tubular body 3 is 30 mm, the pitch of the mesh is 15 mm apart, and the thickness of the part constituting the mesh is 3 mm. In addition, polyethylene is employ | adopted as a synthetic resin which forms the tubular body 3, and the tubular body 3 has a certain amount of flexibility and shape retention property.

  And as shown in FIG. 2, the six tubular bodies 3 are arrange | positioned along the outer periphery of the cylindrical body 2, and the composite tubular body 4 is comprised. A cover member 5 is covered on the outer surface of the composite tubular body 4. This cover member 5 uses polyester 1000/4 × 2 / cm as the warp and polyester 1000/4 × 2 / cm as the weft, and is woven in a plain weave with these warps and wefts. A cylindrical woven fabric. Here, the circumferential length of the cover member 5 is substantially smaller than the circumferential length (for example, 110 mm) of the composite tubular body 4 in a state where the mortar 21 is injected into the cylindrical body 2 (a state in which the mortar 21 is expanded in the radial direction). Same or slightly smaller (for example, 100 mm). Further, in a state where the mortar 21 is not injected into the cylindrical body 2, the cover member 5 is in a bumped state.

  Furthermore, along the outer surface of the cover member 5, a linear body 6 made of a vinyl adhesive tape having easy cutting properties and stretchability is wound spirally. With this linear body 6, the drain material 1 has a structure in which the cylindrical body 2 and the six tubular bodies 3 constituting the composite tubular body 4 and the cover member 5 are integrated. And the drain material 1 is comprised so that it may expand | swell to radial direction entirely by inject | pouring the mortar 21 in the cylindrical body 2 located in the innermost side. As described above, each of the six tubular bodies 3 has a certain degree of flexibility, so that the drain material 1 can be stored or transported while being wound around a reel or the like with a relatively large radius of curvature. Yes and easy to handle.

  Furthermore, the composite tubular body 4 including the tubular body 2 and the six tubular bodies 3 disposed along the outer periphery of the tubular body 2 and having shape retention is formed by a cover member 5 made of a tubular woven fabric. Since it is bundled and integrated by the linear body 6 in the covered state, the strength of the drain material 1 against the earth pressure becomes very high. Moreover, since the surface of the composite tubular body 4 is covered with a cover member 5 made of a tubular woven fabric having a high tensile strength, the drain material 1 is not easily broken.

  Moreover, when the drain material 1 is installed in the ground and the mortar 21 is injected into the innermost cylindrical body 2, the drain material 1 is expanded into a circular cross section by the cover member 5 (see FIG. 7). Since the drain material 1 is in close contact with the hole 20 (see FIG. 5) formed in the ground, the inner wall of the hole 20 can be prevented from collapsing. Furthermore, since surplus water etc. can be discharged | emitted also from the space formed between the six tubular bodies 3 and the cover member 5, it is excellent in the discharge function.

Next, the manufacturing method of this drain material 1 is demonstrated.
As shown in FIG. 3, first, a composite tubular body 4 is formed by arranging six synthetic resin tubular bodies 3 around one cylindrical body 2, and this composite tubular body 4 is connected to the annular loom 10. Insert it inside. At this time, if the tubular woven fabric and the six tubular bodies 3 are bundled with a wire having sufficient stretchability such as a rubber band, the insertion operation into the annular loom 10 can be easily performed. The six tubular bodies 3 are arranged so as to be displaced from each other in the length direction so that the strength of the composite tubular body 4 against the earth pressure is uniform.

  Next, the diameter of the cover member 5 made of a cylindrical woven fabric using the warp yarns 11 and the weft yarns 12 supplied radially by the annular loom 10 is determined by the gauge ring 13 outside the composite tubular body 4. Weaving. The cover member 5 is woven to a diameter sufficiently larger than that of the composite tubular body 4, and covers the outer surface of the composite tubular body 4 in a loose state.

  Finally, a tape support member 15 that supports the vinyl adhesive tape as the linear body 6 having easy cutting properties and stretchability while simultaneously feeding the composite tubular body 4 and the cover member 5 from the annular loom 10 by the feeding mechanism 14. The linear body 6 is spirally wound along the outer surface of the cover member 5 while rotating around the vertical axis in FIG. A plurality of vinyl adhesive tapes may be wound in a ring shape, or a plurality of linear bodies 6 such as rubber bands that can be expanded may be attached in the longitudinal direction instead of the vinyl adhesive tape. Also, once the linear body 6 is spirally wound, the tape support member 15 is rotated in the reverse direction, and as shown in FIG. 4, the linear body 6 is wound in the reverse direction by another spiral. You may make it turn.

  According to this manufacturing method, the cover member 5 covering the outer surface of the composite tubular body 4 is woven by the annular loom 10, and the linear body 6 is wound along the outer surface of the woven cover member 10 to drain. The material 1 can be manufactured, the manufacturing process of the drain material 1 can be simplified, and the manufacturing cost can be reduced. Further, it is possible to easily manufacture a long drain material 1 having a certain degree of flexibility and capable of being integrally expanded outward in the radial direction of the cylindrical body 2.

Next, a method for installing the drain material 1 in the ground will be described.
As shown in FIG. 5, before installing the drain material 1, a hole 20 for inserting the drain material 1 into the ground is formed in advance using an excavator or the like. The diameter of the hole 20 is set to be approximately the same as the diameter of the drain material 1 in a state where the mortar 21 is injected into the cylindrical body 2 and expanded (see FIG. 7). Further, the hole 20 is formed to be slightly inclined so as to become lower toward the inlet side in order to easily discharge excess water. Further, the drain material 1 is cut into a predetermined length, and one end of the cylindrical body 2 is closed by sewing or the like.

  Next, as shown in FIG. 5, the drain material 1 is inserted into the hole 20 with the closed end side of the cylindrical body 2 as the tip. At this time, since the cylindrical body 2 has flexibility, it is folded into a substantially flat shape (see FIGS. 1 and 2), and the diameter of the drain material 1 as a whole is smaller than the diameter of the hole 20. . Furthermore, since the six tubular bodies 3 have a certain degree of shape retention, the drain material 1 can be easily inserted into the holes 20.

  Then, as shown in FIG. 6, the mortar 21 is injected into the cylindrical body 2 by the pump 22 in a state where the drain material 1 is inserted into the hole 20. Then, as shown in FIG. 7, the cylindrical body 2 is swelled in the radial direction by the injected mortar 21, and accordingly, the six tubular bodies 3 arranged along the outer periphery of the cylindrical body 2 are cylindrical bodies. 2 radially outward. Here, the vinyl adhesive tape as the linear body 6 wound along the outer surface of the cover member 5 has easy cutting property and stretchability, and the six tubular bodies 3 have the diameter of the cylindrical body 2. Since the linear body 6 is cut or stretched when moving outward in the direction, the movement of the six tubular bodies 3 is not restricted by the linear bodies 6, and the tubular body 3 is covered with the cover member 5. It will be in intimate contact with the inner wall of the hole 20 via.

  As shown in FIG. 8, even after the drain material 1 is in close contact with the inner wall of the hole 20, when the injection pressure of the mortar 21 is increased by the pump 22 for a while, the moisture in the mortar 21 is changed to the cylindrical body 2. The mortar 21 in the tubular body 2 is quickly solidified because it flows into the tubular body 3 through the weave and is discharged to the outside.

  By the way, this drain material 1 is particularly suitable for the ground of comparatively fine particles, for example, embankments with a lot of viscous soil and silt, a beach with fine sand particles, or a golf-like sandbox. This is because, in conventional drain materials, such fine particles accumulate on the surface of the drain material and form a dense cake layer, so that a certain period of time has passed since it was installed in the ground. The drainage will be very poor. On the other hand, in the drain material 1 of the present embodiment, very fine particles of silt or clay soil pass through the cover member 5 and the coarse mesh-shaped tubular body 3 with relatively coarse eyes, and are filled with the mortar 21. Deposits on the surface of the cylindrical body 2. Therefore, the cake layer is hardly formed on the portion closely contacting the inner wall of the hole 20, and the degree of decrease in the drainage function is very small as compared with the conventional drain material 1.

  In addition, a cake layer of soil particles is formed on the surface of the tubular body 3, or slime composed of dead bodies of microorganisms is generated inside the tubular body 3, and the soil particles are entangled with the slime, and a plug is formed inside the tubular body 3. Even when the inside is clogged, the inside can be cleaned because there are a plurality of tubular bodies 3. That is, as shown in FIG. 9, a hose 25 connected to a nozzle, a pump, or the like of the high pressure washer 24 is inserted from the non-clogged tubular body 3 to the vicinity of the distal end of the tubular body 3, and is inserted into the tubular body 3. Inject a large amount of high-pressure water. Then, the injected water destroys the cake layer formed on the surface of the tubular body 3, the cake layer on the surface of the other tubular body 3, and the internal plug, and causes the clogging of the tubular body 3. Is discharged to the outside of the tubular body 3, the lowered drainage function of the drain material 1 can be easily recovered.

  Furthermore, even when such foreign substances cannot be removed even by washing with high-pressure water and the drainage function of the drain material 1 cannot be sufficiently recovered, the old drain material 1 can be pulled out from the hole 20 and replaced with a new drain material 1. Is possible. That is, by pulling out a part of the tubular body 2 or the six tubular bodies 3 into which the mortar 21 is injected, the other tubular body 3 or the tubular body 2 can be easily pulled out from the hole 20. become able to.

  When part of the tubular body 3 is pulled out first, for example, by using a long heat cutter to cut the synthetic resin tubular body 3 in the longitudinal direction, the tubular body 3 is further pulled out. It becomes easy. When a part of the tubular body 3 is pulled out from the hole 20, the diameter of the drain material 1 is reduced accordingly, so that the tubular body 2 filled with the other tubular body 3 and the mortar 21 can be easily pulled out from the hole 20. Become. In addition, as shown in FIG. 10, the mortar 21 cured inside the cylindrical body 2 may be crushed with a long bit 26 or the like, and the cylindrical body 2 may be first extracted from the hole 20. Further, shafts and openings are formed on both sides of the hole 20, and in the state where both ends of the hole 20 are opened, the other end side is removed while extracting the old cylindrical body 2 and the tubular body 3 from one end side of the hole 20. It is also possible to insert new tubular body 2 and tubular body 3.

In the embodiment of the present invention described above, the following effects are obtained.
In the drain material 1, a composite tubular body 4 including a tubular body 2 into which mortar 21 is injected and a plurality of tubular bodies 3 having shape retaining properties is covered with a cover member 5 made of a tubular fabric. Since it is bundled and integrated by the linear body 6, the strength of the drain material 1 against the earth pressure is very high compared to the case where the drain material having the same diameter is formed by one tube. . In addition, handling during storage and transportation becomes easy. Furthermore, since the surface of the composite tubular body 4 is covered with the cover member 5 made of a tubular woven fabric having a high tensile strength, the drain material 1 is hardly broken.

  Further, when the drain material 1 is installed in the ground and the mortar 21 is injected into the innermost cylindrical body 2, the drain material 1 is expanded into a circular cross section by the cover member 5 and formed in the ground. Since the drain material 1 comes into close contact with the formed hole 20, it is possible to prevent the inner wall of the hole 20 from collapsing. Furthermore, surplus water etc. can be discharged also from the space formed between the six tubular bodies 3 and the cover member 5, and it is excellent in the discharge function.

  Since the cylindrical body 2 and the cover member 5 are cylindrical woven fabrics, and the six tubular bodies 3 are synthetic resin pipes having a certain degree of flexibility with respect to bending load, the drain material 1 is relatively It can be stored or transported while being wound on a reel or the like with a large curvature radius, and is easy to handle. Moreover, it can be easily carried into a narrow construction site such as the inside of a vertical shaft, and the degree of freedom of construction site selection is increased.

  Six tubular bodies 3 having shape retention are bundled by linear bodies 6 having easy cutting properties and stretchability, and the outer diameter of the drain material 1 before the mortar 21 is injected into the cylindrical body 2. Is smaller than the outer diameter of the drain material 1 after being injected, so that a hole 20 is formed in advance by an excavator or the like, and the drain material 1 is inserted into the hole 20 to install the drain material 1 Is possible. Therefore, the installation work of the drain material 1 is easy, and it is possible to perform the construction so as not to damage the surrounding scenery as much as possible. When the mortar 21 is injected into the innermost cylindrical body 2 after the drain material 1 is inserted into the hole 20, the six tubular bodies 3 arranged along the outer periphery of the cylindrical body 2. Moves to the outside in the radial direction of the tubular body 2, but the linear body 6 that bundles the tubular body 3 is cut or stretched along with the movement, so that the movement of the tubular body 3 is hindered by the linear body 6. Absent. Therefore, since the tubular body 3 can be reliably brought into close contact with the inner wall of the hole 20 via the cover member 5, surplus water in the soil can easily flow into the tubular body 3 and is excellent in drainage.

  Most of the fine particles in the soil permeate through the cover member 5 made of a coarse tubular fabric and the mesh-like tubular body 3 and accumulate on the surface of the inner tubular body 2 filled with the mortar 21. Therefore, it becomes difficult to form a dense cake layer on the outer surface portion of the drain material 1 that is in close contact with the inner wall of the hole 20, and the degree of decrease in the drainage function of the drain material 1 is small. In addition, even when one tubular body 3 is clogged, the drain material 1 includes a plurality of tubular bodies 3, so that the other tubular body 3 can be drained. Moreover, the clogged tubular body 3 can be easily washed by injecting high-pressure water from the other clogged tubular body 3. Furthermore, by first pulling out the cylindrical body 2 or a part of the tubular body 3 filled with the mortar 21, the drain material 1 can be easily pulled out from the hole 20, and the drain material whose drainage function is lowered. 1 can be exchanged.

Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.
1] As shown in FIG. 11, the cover member 5 of the above embodiment is omitted, and a drain material 1A is formed by a cylindrical body 2 into which a filler is injected and a plurality of pipes arranged along the outer periphery of the cylindrical body. You may comprise by the composite tubular body 4 provided with this tubular body 3, and the linear body 6 wound along the outer surface of the composite tubular body 4. In this drain material 1 </ b> A, when the filler is injected into the inner cylindrical body 2, the plurality of tubular bodies 3 directly adhere to the inner wall of the hole 20, so surplus water in the soil flows into the tubular body 3. It becomes easy.

  2] The number of cylindrical bodies 2 located on the innermost side is not necessarily one, and may be two or more. Further, the number of the tubular bodies 3 is not limited to 6, but if the number of the tubular bodies 3 is too small, the strength against earth pressure may be insufficient, and conversely, the number of the tubular bodies 3 is too large. If it is too much, it becomes difficult to handle the composite tubular body 4 by covering the plurality of tubular bodies 3 with the cover member 5 and integrating them when the drain material 1 is manufactured. It is preferable to use an appropriate number in consideration.

  3] The tubular body 3 may be a tubular woven fabric using a weft having rigidity such as a monofilament or a wire as a weft, in addition to a mesh-like synthetic resin tube as in the above embodiment. In such a tubular body, the strength against earth pressure is higher than that of a synthetic resin tubular body, and the tubular body is less likely to be crushed. Further, by roughening the texture of the tubular woven fabric, it is possible to increase the size of the through hole of the tubular body to prevent clogging while ensuring sufficient strength against earth pressure.

  4] As the filler to be injected into the inner cylindrical body 2, various fillers such as urethane foam and thermosetting resin can be used in addition to the cement-based solidified material such as the mortar 21 of the embodiment. For example, when urethane foam is used as the filler, the filler is more easily crushed when the cylindrical body 2 is pulled out from the hole 20. Furthermore, as shown in FIG. 12, when the urethane foam 30 is injected into the cylindrical body 2 by the urethane foam injector 31, if the hose 32 used for the injection is left, the cylindrical shape is obtained via the hose 32. It is also possible to dissolve the foamed urethane 30 by injecting a solvent into the body 2.

  Further, as shown in FIG. 13, solid particles 40 (for example, coarse sand or gravel) having a certain particle size may be injected and filled together with water by a pump 41 into the cylindrical body 2. . In this case, the tip of the cylindrical body 2 is closed by sewing or the like, and a water drain hole 2a is provided in the vicinity of the tip, so that the water in the cylindrical body 2 passes through the surrounding tubular body 3. Therefore, the solid particles 40 such as sand can be reliably filled from the tip of the cylindrical body 2 to the hand while maintaining the momentum of the water flow at the time of injection. Furthermore, when rough sand or gravel is filled, the water flowing into the drain material 1 can flow somewhat in the cylindrical body 2 and the drainage performance of the drain material 1 is improved accordingly. To do.

  5] The drain material of the present invention can be applied when draining surplus water in soil to prevent landslides in mountains and the like, and roadbed foundations associated with railroad track facilities, roads such as general roads and high-standard roads, etc. It can also be used for drainage from various soils such as roadbed foundations, airport facilities, port facilities, landfills, and sports facilities such as baseball fields and soccer fields.

  Further, by using this drain material, not only the liquid such as surplus water can be discharged, but also the gas in the soil can be discharged. For example, by installing the drain material of the present invention in a vertical direction in a garbage landfill or a soil in which natural gas is buried, the gas in the soil can be discharged through the drain material.

It is a perspective view of the edge part of the drain material which concerns on embodiment of this invention. It is a perspective view of the edge part of a composite tubular body. It is explanatory drawing explaining the manufacturing process of a drain material. It is a perspective view of the drain material which wound the linear body twice. It is a figure which shows the state which inserted the drain material in the hole. It is explanatory drawing explaining the process of inject | pouring mortar. It is a perspective view of the edge part of the drain material in which mortar was inject | poured. It is explanatory drawing explaining the process of discharging | emitting the water | moisture content in mortar. It is explanatory drawing explaining the process which inject | pours high pressure water and wash | cleans. It is explanatory drawing explaining the process of crushing a mortar. It is a perspective view of the edge part of the drain material of a change form. It is explanatory drawing explaining the process of filling foaming urethane. It is explanatory drawing explaining the process of filling solid particles, such as sand.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drain material 2 Tubular body 3 Tubular body 3a Through-hole 4 Composite tubular body 5 Cover member 6 Linear body 10 Cover member 10 Annular loom 21 Mortar 30 Urethane foam 40 Solid particle 1A Drain material

Claims (7)

A tubular body which is folded to have a flexible and flat, is disposed along the outer periphery of the cylindrical body, and a plurality of tubular bodies having a large number of through holes are formed and shape retention to the tube wall A composite tubular body comprising
A linear body wound along the outer surface of the composite tubular body;
A drain material characterized by comprising: A tubular body which is folded to have a flexible and flat, is disposed along the outer periphery of the cylindrical body, and a plurality of tubular bodies having a large number of through holes are formed and shape retention to the tube wall A composite tubular body comprising
A cylindrical cover member covering the outer surface of the composite tubular body;
A linear body wound along the outer surface of the cover member;
A drain material characterized by comprising:   The drain material according to claim 2, wherein the cover member is a tubular woven fabric.   The drain material according to any one of claims 1 to 3, wherein the tubular body is made of a flexible material.   The drain material according to any one of claims 1 to 4, wherein the tubular body is a tubular woven fabric woven with warps and rigid wefts.   The drain material according to any one of claims 1 to 5, wherein the linear body has easy cutting property or stretchability. A composite tubular structure in which a plurality of tubular bodies having a plurality of through holes in a tube wall and having a shape-retaining property are arranged along the outer periphery of one or a plurality of cylindrical bodies that are flexible and folded in a flat shape. Form the body,
The composite tubular body is inserted into an annular loom, and a tubular woven fabric is woven so as to cover the outer surface of the composite tubular body by the annular loom,
A method for producing a drain material, comprising: winding a linear body along an outer surface of a tubular fabric while simultaneously feeding the composite tubular body and the tubular fabric from an annular loom.

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