JP2009097245A - Drainage material and connection tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drainage material which can be easily adjusted in drain capability and is handled easily. <P>SOLUTION: The drainage member includes a plurality of irregular sheets 3 and 3 having a plurality of hollow projections 31, a plastic sheet 4 which is interposed between the irregular sheets 3 and 3 and is not glued to at least one of the irregular sheets 3 and 3, and a cylindrical body 2 which houses the irregular sheets 3 and 3 and the plastic sheet 4 and has a partial water permeability. A plurality of water-passing holes 41 are formed on the plastic sheet 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drainage material that is installed on embankment, soft ground, the back of a retaining wall, etc., and discharges moisture in the soil, and a connection jig for connecting the drainage material in the extending direction.

  Conventionally, a core material such as a concavo-convex resin plate or a lattice plate in which a plurality of projections and depressions are formed is housed in a water-permeable bag body such as a nonwoven fabric, and is installed in the soil and used as a drainage material. (See Patent Documents 1 to 4).

In all of the drainage materials disclosed in these documents, the core material accommodated in the bag body is one layer. In Patent Documents 2 and 3, etc., a single layer core material in which protrusions are provided above and below the central plate material. Is housed.
Japanese Patent Publication No. 6-11991 JP-A-8-189300 JP-A-8-260451 JP 2006-200203 A

  However, in the case of conventional drainage materials, it is necessary to use a plurality of drainage materials contained in the bag in piles in order to increase drainage capacity, and the cost is high and the stability is poor and the installation is troublesome. .

  Also, if the height of the core material is increased to increase the flow cross-section, it is necessary to increase the rigidity by increasing the thickness of the core material in order to ensure the resistance to earth pressure, etc. There is a possibility that the material becomes plate-like and the flexibility is lowered, making it difficult to handle.

  Accordingly, an object of the present invention is to provide a drainage material that can be easily adjusted for drainage capacity and that is easy to handle, and a connecting jig that connects the drainage materials.

  In order to achieve the above object, the drainage material of the present invention, when laminating a plurality of concavo-convex resin plates on which a plurality of hollow bulges are formed, The concave and convex resin plates are laminated so as not to enter the concave portions between the convex portions or the hollow convex portions, and are accommodated in a cylindrical body having water permeability at least partially.

  For example, a plurality of concavo-convex resin plates formed with a plurality of hollow protrusions, and interposed between the concavo-convex resin plates, and at least one concavo-convex resin plate is a non-adhering separator, and the plurality of concavo-convex resin plates A cylindrical body having water permeability is provided in at least a part for accommodating the uneven resin plate and the separator. Here, a plurality of water holes can be formed in the separator. The separator may be formed of a tensile reinforcing material.

  In addition, when laminating the concavo-convex resin plates, the convex portions, the back surfaces of the concave portions, or the convex portions and the back surfaces of the concave portions can be opposed to each other.

  Further, when laminating the concavo-convex resin plate, the convex portions, the back surfaces of the concave portions or the convex portions and the back surface of the concave portions are opposed to each other, and the size of one concave portion is set to the size of the other convex portion or the concave portion. It may be smaller than this.

  Moreover, a through-hole can be formed in at least a part of the plurality of convex portions or concave portions.

  On the other hand, the connection jig of the present invention is a connection jig for connecting drainage materials to each other, and a pair of gripping pieces each abutting on the outermost uneven resin plate of the laminated uneven resin plates, and A groove portion for accommodating a convex portion at one end of the drainage material and a convex portion at the end portion of the other drainage material formed on the uneven resin plate side of the gripping piece, and the pair of gripping pieces It is characterized by comprising a connecting portion of the pair of gripping pieces formed so as to be able to prevent the sandwiched concavo-convex resin plates from being pulled out.

  In addition, the drainage material of the present invention includes a concavo-convex resin plate in which a plurality of hollow protrusions are formed, a cylindrical body having water permeability in at least a part of the concavo-convex resin plate, and the concavo-convex resin plate. A configuration may be provided that includes a protective plate that is interposed between the cylindrical body and that is opposed to the cylindrical body having water permeability and has a plurality of water passage holes.

  The drainage material of the present invention configured as described above can easily adjust the drainage capacity by laminating a plurality of concave and convex resin plates.

  Moreover, if it is the structure which laminated | stacked the several uneven | corrugated resin board, since flexibility is high and it can wind up and convey, even if a drainage material becomes long, handling is easy.

  Further, by interposing the separator between the concavo-convex resin plates, the opposing concavo-convex resin plates do not overlap and the flow down section does not decrease. Moreover, by making at least one uneven | corrugated resin plate and a separator plate non-bonding, a slip arises between board | plate materials and can be bent easily.

  Furthermore, by forming the separator with a tensile reinforcement, for example, if this drainage material is placed on a high embankment using viscous soil, the water content of the viscous soil with a high water content ratio is reduced by the drainage function, and the high embankment is reduced. Is promoted, and the shear resistance against the slip in the high embankment can be increased by the tension reinforcing function of the separator.

  And by forming a some water flow hole in a separator, the movement of water is not interrupted | blocked by a separator, and the flow-down cross section of the both sides of a separator can be utilized effectively.

  Moreover, it can prevent that the laminated uneven | corrugated resin plate overlaps by making the convex parts of the uneven | corrugated resin plate which opposes, the back surfaces of a recessed part, or the convex part and the back surface of a recessed part oppose.

  Moreover, it can also prevent that the laminated uneven | corrugated resin plate overlaps also by making the magnitude | size of one recessed part of the uneven | corrugated resin plate which opposes smaller than the magnitude | size of the other convex part or a recessed part.

  Furthermore, the flow-down cross section of the concavo-convex resin plate can be effectively used by forming through holes in the convex portions or concave portions.

  Moreover, the drainage material which laminated | stacked the several uneven | corrugated resin board can be easily connected by using the connection jig which hold | grips the convex part of a drainage material.

  In addition, by interposing a protective plate between the concave and convex resin plate and the cylindrical body, soil and gravel will not enter the hollow of the convex portion or the concave portion, thereby preventing damage to the cylindrical body and reduction of the flow down section. Can do.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIG. 2, the drainage material 1 of the present embodiment is long in a strip shape, and can be used to drain the water in the soil by laying it horizontally at the bottom or inside of the embankment. It can also be used by extending vertically on the back of the retaining wall.

  First, the configuration of the drainage material 1 of the present embodiment will be described. As shown in FIGS. 1 and 2, the drainage material 1 has a plurality of irregularities formed with a plurality of hollow convex portions 31. Asperity sheet 3, 3 as a resin plate, plastic sheet 4 as a separator interposed between the concavo-convex sheets 3, 3, and a cylinder having water permeability for accommodating the plurality of concavo-convex sheets 3, 3 and the plastic sheet 4 It is mainly composed of the body 2.

  The concavo-convex sheet 3 is formed to a thickness of, for example, about 0.1 to 3.0 mm using a hard thermoplastic resin such as hard vinyl chloride, polystyrene, polyethylene, polypropylene, nylon, polyester, or ABS.

  In this uneven sheet 3, a plurality of hollow convex portions 31,... Are formed in a staggered pattern, for example, and a concave portion 33 is formed between the convex portions 31, 31. The shape of the convex portion 31 is not limited to the frustoconical shape as shown in FIGS. 1 and 2, and may be any shape such as an elliptical cone shape or a polygonal cone shape.

  Further, through holes 32,... Are formed in some of the convex portions 31,.

  The plastic sheet 4 is molded to a thickness of, for example, about 0.1 to 1.0 mm by using a hard thermoplastic resin such as hard vinyl chloride, polystyrene, polyethylene, polypropylene, nylon, polyester, ABS, etc. Is done.

  Further, the plastic sheet 4 is also provided with a plurality of water passage holes 41. For example, holes having a diameter of 2 to 10 mm can be provided at intervals of 50 to 200 mm.

  In the present embodiment, as shown in FIGS. 1 and 2, the two concavo-convex sheets 3 and 3 are laminated so that the convex portions 31,. Intervene.

  When the plastic sheet 4 is used as a tensile reinforcement, the sheet is formed of, for example, hard vinyl chloride having a tensile strength of about 10 kN / m to 100 kN / m or a composite material of polypropylene and polyethylene.

  Moreover, the cylindrical body 2 which accommodates this uneven | corrugated sheet | seat 3,3 and the plastic sheet 4 is a cylindrical member provided with water permeability in at least one part, and as shown in FIG. 4 surrounds the outer periphery of the laminate.

  The cylindrical body 2 can be formed into a cylindrical shape with both ends communicating with, for example, a hydrophilic woven fabric or nonwoven fabric.

  The fiber material for producing the cylindrical body 2 includes hydrophilic fibers, hydrophobic fibers, natural fibers such as cotton, hemp and wool, inorganic fibers such as metal, glass and carbon, cellulose, and proteins. And the like, synthetic fibers such as polyamide, polyester, polyolefin, polyurethane, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyacryl, and polyvinyl alcohol can be used alone or in combination. In addition, when using a hydrophobic fiber, what is necessary is just to process with higher fatty acid alkali salts, quaternary ammonium salts, etc., and to provide hydrophilicity.

  Next, the effect | action of the drainage material 1 of this Embodiment is demonstrated.

  When the drainage material 1 of the present embodiment configured as described above is embedded in the soil, pore water in the soil enters the inside through the water permeable portion of the cylindrical body 2 and has a lower flow resistance than in the soil. The inside of the drainage material 1 flows down in the extending direction. At this time, if there is water flowing between the convex portions 31, 31 of the concavo-convex sheet 3, it enters the hollow of the convex portion 31 or flows into the concavo-convex sheet 3 below through the water passage holes 41 of the plastic sheet 4. There is also water.

  For this reason, drainage capacity can be easily adjusted by laminating a plurality of uneven sheets 3. That is, even if sufficient drainage capacity cannot be obtained with one sheet of uneven sheet 3, the drainage capacity can be increased by increasing the flow cross-section by stacking a plurality of uneven sheets 3. .

  Further, if the plastic sheet 4 is interposed between the concavo-convex sheets 3 and 3 in a non-adhered state, when the drainage material 1 is wound up, slipping occurs between the sheets 3, 4 and 3 and the sheet is easily bent. Can be wound up. For this reason, even if the drainage material 1 becomes long, it can be wound up and conveyed, and handling is easy.

  Furthermore, if the plastic sheet 4 is interposed between the concavo-convex sheets 3, 3, the convex part 31 of one concavo-convex sheet 3 enters the hollow of the convex part 31 of the other concavo-convex sheet 3 and the concavo-convex sheets 3, 3 overlap each other. As a result, the flow cross-section will not decrease.

  Furthermore, by forming a plurality of water passage holes 41 in the plastic sheet 4, the movement of water between the upper uneven sheet 3 and the lower uneven sheet 3 is not blocked by the plastic sheet 4, The flow-down cross sections on both sides of the plastic sheet 4 can be communicated and used effectively.

  Moreover, also by forming the through-hole 32 in the convex part 31 or the recessed part 33, the hollow space of the uneven | corrugated sheet 3 can be utilized effectively as a flow-down cross section.

  Further, when the plastic sheet 4 is formed of a tensile reinforcing material, for example, a plurality of drainage materials 1 horizontally oriented at intervals in the height direction inside a high embankment using cohesive soil, a high water content is provided by a drainage function. The water content ratio of the viscous soil of the ratio is reduced to promote the consolidation of the high embankment, and the shear resistance against the slip in the high embankment can be increased by the tensile reinforcement function of the plastic sheet 4.

  Hereinafter, the connection jigs 5A and 5B for connecting the drainage materials 1A and 1B as described in the above embodiment will be described with reference to FIGS. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  The drainage material 1 as described in the above embodiment is manufactured as a long belt-like member at a factory, wound up in a columnar shape, and conveyed to the site. Then, the drainage material 1 having a cylindrical shape is stretched and laid as a belt-like long member.

  Here, since only one unit of the drainage material 1 may not reach the desired length, it is necessary to connect the plurality of drainage materials 1,...

  At that time, connecting jigs 5A and 5B as shown in FIGS. 3 and 4 are used so that the drainage materials 1A and 1B can be easily connected to each other.

  The connecting jig 5A shown in FIG. 3 includes a pair of gripping pieces 51 and 51 that are in contact with the upper and lower concave and convex sheets 3 and 3, respectively, and one of the gripping pieces 51 and 51 formed on the concave and convex sheet side. Grooves 511 and 511 for accommodating the convex portion 31 at the end of the drainage material 1A and the convex portion 31 at the end of the other drainage material 1B, respectively, and the laminated sheet 3 sandwiched between the pair of gripping pieces 51 and 51 , 4, 3 are mainly composed of a pair of gripping pieces 51, 51 formed so as to be prevented from coming out.

  The grip pieces 51 and 51 are formed in a rectangular plate shape, and both ends thereof are connected to each other by connecting portions 54 and 54 having a rectangular plate shape, and are formed in a square tube shape. Further, the gripping piece 51 has protruding edge portions 52 and 52 extending on both side edges in the connecting direction, and a protruding portion 53 is extended between the edge portions 52 and 52 so that two pieces are provided. Groove portions 511 and 511 are formed.

  And as shown to Fig.3 (a), the convex part 31 of one drainage material 1A and the convex part 31 of the other drainage material 1B are accommodated in this groove part 511,511, respectively. Further, the connecting portions 54, 54 of the connecting jig 5A are formed at substantially the same height as the stacked sheets 3, 4, 3, and drainage on both sides accommodated in the upper and lower groove portions 511,. The convex portions 31,... Of the materials 1A, 1B are not caught by the edge portions 52,.

  Note that the end of the cylindrical body 2 is overlaid so as to cover the outer peripheral surface of the connecting jig 5A, and is fixed with a tape or an adhesive.

  Subsequently, the connection jig 5B shown in FIG. 4 has a pair of grip pieces 51, 51 and a convex portion 31 formed on the concave and convex sheet side of the grip pieces 51, 51, similarly to the connection jig 5A. ,... Are mainly composed of groove portions 511 and 511 for respectively accommodating the gripping pieces 51 and 51 and connecting portions 55A and 55B for connecting the both ends.

  The connecting portions 55A and 55B are formed so that one connecting portion 55B can be separated into an upper connecting portion 551 and a lower connecting portion 552, and can be connected by locking the locking claws 553 and 553. It is configured.

  And the latching nail | claws 553 and 553 are removed, the upper side connection part 551 is lifted, and the edge part of drainage material 1A, 1B is inserted from the both sides of the connection jig 5B.

  At this time, the convex portions 31,... Of the drainage materials 1A, 1B are accommodated in the groove portions 511, 511 of the lower gripping piece 51, respectively, and the upper plastic gripping pieces 51 are overlapped with each other. , And the convex portions 31,... Are accommodated in the groove portions 511, 511, and the upper coupling portion 551 and the lower coupling portion 552 are coupled by the locking claws 553, 553. In the connection using the connection jig 5B, the end portions of the cylindrical bodies 2 and 2 of the drainage materials 1A and 1B are also housed and sandwiched inside the connection jig 5B.

  If the projections 31,... Of the drainage materials 1A, 1B are gripped by the connecting jigs 5A, 5B configured as described above, a plurality of concave and convex sheets 3,. The drainage materials 1A and 1B can be easily connected.

  For this reason, even if the laying length is long, the drainage material 1A, which has been manufactured and wound up in the unit length at the factory, is transported to the site and is connected to the site by the connecting jigs 5A, 5B. If connected, the drainage material 1 having a desired length can be laid.

  Other configurations and operational effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  Hereinafter, a drainage material 1C having a different form from the above-described embodiment will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  In the above embodiment, the upper and lower concave and convex sheets 3 and 3 are laminated in the same direction, but in this Example 2, the upper and lower concave and convex sheets 3 and 3 are reversed so that the concave portions 33 and 33 face each other. The case where they are stacked will be described.

  As shown in FIG. 5, even when the upper and lower concavo-convex sheets 3 and 3 are laminated in the opposite direction, if the concavo-convex sheets 3 and 3 are displaced if the plastic sheet 4 is not interposed, There is a possibility that the other recessed portion 33 fits in the hollow and the flow down section decreases.

  Therefore, by interposing the plastic sheet 4 between the upper and lower concavo-convex sheets 3, 3, the stacked concavo-convex sheets 3, 3 can be prevented from overlapping. In this case as well, if the concave and convex sheets 3 and 3 and the plastic sheet 4 are in a non-adhesive state, slippage occurs between the sheets 3, 4 and 3 when bent, so that they can be easily wound up. it can.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Hereinafter, a drainage material 1D having a different form from the above-described embodiment and Example 2 will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  In this drainage material 1D, the plastic sheet 4 as described in the above embodiment is not interposed between the uneven sheets 3 and 3 to be laminated.

  That is, the protrusions 31 and 31 of the upper and lower uneven sheets 3 and 3 are laminated so that the protrusions 31 and 31 face each other, and the protrusions 31 and 31 are adhered with the adhesive 6 so as not to be displaced.

  If the relative positional relationship between the concavo-convex sheets 3, 3 is fixed by the adhesive 6 in this way, the convex portion 31 of one concavo-convex sheet 3 is between the convex portions 31 of the other concavo-convex sheet 3. It does not enter the recess 33. Moreover, since it is not necessary to interpose the plastic sheet 4, material costs can be reduced.

  Furthermore, if it is the structure which adhere | attaches the convex parts 31 and 31 discretely, even when the uneven | corrugated sheet | seats 3 and 3 are laminated | stacked, it can bend.

  Moreover, in this Example 3, the water flow hole 32 is provided in the recessed part 33, and the hollow space formed by the uneven | corrugated sheet | seats 3 and 3 is utilized effectively as a flow-down cross section.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Hereinafter, a drainage material 1E in a form different from the above-described embodiment and Examples 2 and 3 will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  As shown in FIG. 7, the drainage material 1 </ b> E is similar to the embodiment described above in the concave-convex sheet 3 disposed on the lower side, but the concave-convex sheet 3 </ b> A serving as the concave-convex resin plate disposed on the upper side is concave-convex. Compared with the sheet 3, the convex portion 31A and the interval between the convex portions 31A and 31A (concave portion 33A) are formed larger.

  That is, the lower concavo-convex sheet 3 is installed so that the convex portion 31 faces upward, and the upper concavo-convex sheet 3A is installed so that the convex portion 31A faces downward, and no separator is interposed therebetween.

  Thus, if the magnitude | size of the convex parts 31 and 31A of the upper and lower uneven | corrugated sheets 3 and 3A is adjusted, the convex part 31 of one uneven | corrugated sheet 3 will be between the convex parts 31A and 31A of the other uneven | corrugated sheet | seat 3A which opposes. It does not enter the recess 33A. Moreover, since it is not necessary to interpose the plastic sheet 4 and the adhesive 6, the material cost can be reduced.

  Further, since the concave and convex sheets 3 and 3A are not bonded, slipping occurs when the drainage material 1E is wound up, and it can be easily bent.

  Moreover, in Example 4, the water passage holes 32 and 32A are provided in the concave portions 33 and 33A, and the hollow space formed by the concave and convex sheets 3 and 3A is effectively used as a flow-down section.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Hereinafter, drainage materials 7A and 7B in a form different from the above-described embodiment will be described with reference to FIGS. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  As shown in FIG. 8, the drainage material 7 </ b> A is placed on the concavo-convex sheet 3 as one concavo-convex resin plate formed with a plurality of hollow convex portions 31,. As a protective plate, it is mainly composed of a protective sheet 8 and a cylindrical body 2 having water permeability that accommodates the uneven sheet 3 and the protective sheet 8.

  The protective sheet 8 is formed with a plurality of water holes 81, and the configuration thereof is the same as that of the plastic sheet 4 as the separator described in the above embodiment, and thus detailed description thereof is omitted. To do.

  In the drainage material 7A configured in this way, the protective sheet 8 is interposed between the concavo-convex sheet 3 and the cylindrical body 2, so that soil and gravel do not enter the concave portion 33, and the cylindrical body 2 is damaged. It is possible to prevent a decrease in the cross-sectional area.

  On the other hand, the drainage material 7B shown in FIG. 9 has a configuration similar to that of the drainage material 1C described in FIG. 5 of the second embodiment, and between the upper concave-convex sheet 3 and the cylindrical body 2, and the lower side. Protective sheets 8 and 8 are interposed between the concavo-convex sheet 3 and the cylindrical body 2, respectively.

  For this reason, as with the drainage material 1C of Example 2, the flow-down cross section can be made large, and the upper surface side and the lower surface side are protected by the protective sheets 8 and 8, so that the cylindrical body 2 is damaged, the concave portion 33 and the convex Sediment does not enter the hollow of the portion 31 and the flow down section does not decrease.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  The best embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment and example, and the design does not depart from the gist of the present invention. Such modifications are included in the present invention.

  For example, in the said embodiment, although the two uneven | corrugated sheets 3 and 3 were laminated | stacked, it is not limited to this, Three or more uneven | corrugated sheets 3 ... can be laminated | stacked.

  Moreover, in the said embodiment and Example, although the through-holes 32 and 32A were provided in the uneven | corrugated sheet | seats 3 and 3A, the position, the number, and the presence or absence of these through-holes 32 and 32A are not limited to this. Even if it is the part 31 or the recessed part 33, it can pierce | pierce with arbitrary intervals and numbers. Furthermore, the position, number, and presence / absence of the water passage holes 41 provided in the plastic sheet 4 are not limited to this, and can be arbitrarily set.

  Moreover, although the cylindrical body 2 demonstrated in the said embodiment and Example was entirely formed with the water-permeable material, it is not limited to this, For example, only the upper surface of a drainage material is a water-permeable material. A cylindrical body whose lower surface is formed of a water shielding sheet can also be used.

  Further, the plastic sheet 4 described in the embodiment and the example is interposed in an unbonded state with respect to both the upper and lower concavo-convex sheets 3, 3. Even if the sheet 4 is bonded to one uneven sheet 3, if the sheet 4 is not bonded to the other uneven sheet 3, slippage occurs between the sheets 3 and 4, so that the drainage material can be easily bent.

It is sectional drawing explaining the structure of the drainage material of the best embodiment of this invention. It is a perspective view explaining the composition of the drainage material of the best embodiment of the present invention. It is a figure explaining the structure of the connection jig | tool of Example 1, Comprising: (a) is a perspective view, (b) is sectional drawing at the time of connecting drainage materials with a connection jig. It is a figure explaining the structure of the connection jig of another form of Example 1, Comprising: (a) is a perspective view, (b) is sectional drawing at the time of connecting drainage materials with a connection jig. It is sectional drawing explaining the structure of the drainage material of Example 2. FIG. It is sectional drawing explaining the structure of the drainage material of Example 3. FIG. It is sectional drawing explaining the structure of the drainage material of Example 4. FIG. It is sectional drawing explaining the structure of the drainage material of Example 5. FIG. It is sectional drawing explaining the structure of the drainage material of another form of Example 5. FIG.

Explanation of symbols

1 Drainage material 1A-1E Drainage material 2 Cylindrical body 3, 3A Concavity and convexity sheet (concave and convex resin plate)
31, 31A Convex part 32, 32A Through hole 33, 33A Concave part 4 Plastic sheet (separator)
41 Water-passing holes 5A, 5B Connection jig 51 Grasping piece 511 Groove part 54 Connection part 55A, 55B Connection part 6 Adhesive 7A, 7B Drainage material 8 Protective sheet (protective plate)
81 Water hole

Claims (9)

  When laminating a plurality of concave and convex resin plates having a plurality of hollow convex portions, the convex portion of one concave and convex resin plate is a concave portion between the convex portions of the other concave and convex resin plate or the hollow convex portion. A drainage material characterized in that it is laminated so as not to enter the part and accommodated in a cylindrical body having water permeability at least partially. A plurality of concave and convex resin plates formed with a plurality of hollow convex portions;
While being interposed between the concavo-convex resin plates, at least one concavo-convex resin plate and a non-adhesive separator,
A drainage material comprising a cylindrical body having water permeability in at least a part for accommodating the plurality of uneven resin plates and the separator plate.   The drainage material according to claim 2, wherein a plurality of water passage holes are formed in the separator.   The drainage material according to claim 2 or 3, wherein the separator is formed of a tensile reinforcing material.   The drainage material according to claim 1, wherein when the concave and convex resin plates are laminated, the convex portions, the back surfaces of the concave portions, or the convex portions and the back surfaces of the concave portions are opposed to each other.   When laminating the concavo-convex resin plate, the convex portions, the back surfaces of the concave portions or the convex portions and the back surface of the concave portions face each other, and the size of one concave portion is smaller than the size of the other convex portion or concave portion. The drainage material according to claim 1, wherein   The drainage material according to any one of claims 1 to 6, wherein a through hole is formed in at least a part of the plurality of convex portions or concave portions. A connection jig for connecting the drainage materials according to any one of claims 1 to 7,
A pair of gripping pieces each in contact with the outermost uneven resin plate of the laminated uneven resin plate;
Grooves that respectively accommodate the convex portions of the end portions of the one drainage material and the convex portions of the other end portions of the drainage material formed on the uneven resin plate side of the gripping pieces,
A connecting jig, comprising: a connecting portion of the pair of gripping pieces formed so as to prevent the laminated concave and convex resin plates sandwiched between the pair of gripping pieces from being pulled out. A concavo-convex resin plate on which a plurality of hollow convex portions are formed;
A cylindrical body having water permeability in at least a part for accommodating the uneven resin plate;
A protective plate that is interposed between the concave-convex resin plate and the cylindrical body and that has a plurality of water holes formed in a portion facing the cylindrical body having water permeability. Characterized drainage material.

Images