JP2009215766A - Structural member for rainwater storage and infiltration system, and rainwater storage and infiltration system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structural member for a rainwater storage and infiltration system, and the rainwater storage and infiltration system using the structural member reduced in weight while increasing resistance force to shear deformation and ensuring a function of a top plate for partitioning a structure or a structure body from soil covering, and structured to facilitate maintenance and inspection and to secure a large space when assembled. <P>SOLUTION: The outer peripheral part of the top plate P is provided with ribs Ra perpendicular to a plate, and the side part upper ends of lateral members 2 or connecting members 1 corresponding to the ribs Ra are provided with recessed groove parts. Each rib Ra is fittingly joined to the groove part, and the inside of the rib Ra is provided with a plurality of ribs Rb of projecting shape having a projecting height larger than the projecting height of the rib Ra. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structural member for a rainwater storage and penetration system and a rainwater storage and penetration system using the same, and more specifically, a plurality of vertical members and a horizontal member can be assembled to form a three-dimensional structure and a space can be formed therein. The present invention relates to a structural member for a rainwater storage and penetration system and a rainwater storage and penetration system using the same.

  In recent years, particularly in urban areas, problems such as abnormal rainfall and flooding, and vice versa, have frequently occurred, and the cause is the heat island phenomenon. In order to alleviate this phenomenon, the construction of facilities that use rainwater has been proposed, and development of rainwater storage structures or rainwater storage fillers has been progressing.

  As such a rainwater storage structure, for example, a pit is dug in the ground, a water shielding sheet is laid on the outer surface, a plurality of container-like members are stacked vertically and horizontally, and a top cover is covered with soil. A structure for covering rainwater and storing rainwater is known. Specifically, as shown in FIG. 13, the tank unit 102 is configured by digging down the ground 101. The shape of the tank portion 102 is formed based on a plane quadrangle, and the side wall portion 102a is a gently inclined surface. Concrete or the like is not placed on the bottom 102b and the side wall 102a of the tank 102. The bottom 102b of the tank 102 is formed with a structure in which gravel is spread to form a gravel layer 103, and box-shaped members 104, 104,... Are arranged continuously on the gravel layer 103. Here, 109 represents a coating layer, 110 represents a lateral groove, and 111 represents an outlet (see, for example, Patent Document 1).

JP-A 63-268823

  However, the rainwater storage structure or the rainwater storage system (TUTT) using the rainwater storage structure of the above embodiment has the following problems.

  (1) A top plate may be used for a structure or a structure used in the rainwater storage system for partitioning with a covering soil or the like. At this time, the current top plate used is usually mounted with a flat plate so that it can be easily removed, and it functions so as to have sufficient strength against an overload. However, there was almost no effect on the structure or the stress applied to the structure. In addition, for fixing, a method such as covering a vertical member with a cap member is usually used, but this is the same in this case.

  (2) On the other hand, in the rainwater storage system, a force may be exerted in the direction in which the upper part is enlarged with respect to the structure or the structure due to the external force due to the shape of the foundation or backfilling. There was a limit because it supported the load at the joint. When a load exceeding the capacity was generated, there was an event that the fitting portion was broken. Further, when a load is applied to the structure or a part of the structure, there is an event that the whole structure or the structure is distorted and becomes a rhombus. Therefore, it was necessary to work carefully while confirming the status of the rainwater storage system at the time of backfilling work so that such an event would not occur.

  (3) Furthermore, the structure or structure has a structure that is easy to assemble from the individual components because the rainwater storage space is built in and bulky in the assembled state when transported to the site where the rainwater storage system is provided. There is a need for it, and weight reduction is required for workability on site. As described above, in the rainwater storage system, it is required to satisfy many constraints and improve the individual components including the top plate.

  Therefore, in view of the above-described problems of the prior art, the object of the present invention is to enhance the resistance to shear deformation while ensuring the function of the top plate that partitions the structure or structure from the cover soil, while Another object of the present invention is to provide a structural member for a rainwater storage and infiltration system having a structure that can reduce the weight and secure a large space when assembled and can be easily maintained and inspected, and a rainwater storage and infiltration system using the structural member. In addition, the structural member for the rainwater storage system can be easily assembled from the individual components and can be assembled on site to reduce the transportation cost and flexibly cope with the shape of the rainwater storage and penetration tank. Another object is to provide a rainwater storage and infiltration system equipped with this.

  As a result of intensive studies, the present inventor has found that the above object can be achieved by the following structural member for a rainwater storage and penetration system and a rainwater storage and penetration system using the same, and has completed the present invention.

  That is, the present invention forms a three-dimensional structure as a unit by fitting a plurality of vertical members and horizontal members so that they can be inserted and removed, and the three-dimensional structure as a unit is in the vertical direction, the horizontal direction, and the height direction. If there is a connecting member that forms a space inside and is placed on top of the three-dimensional structure and connects the vertical member, the horizontal member, or these, In a structural member for a rainwater storage and infiltration system having a flat top plate that is joined and fixed to either one of the outer peripheral portion of the top plate, a bent edge perpendicular to the flat plate and / or a convex rib (also referred to as “rib Ra And a plurality of convex ribs Rb having a projection height larger than the projection height is provided inside the rib Ra. , The rib And characterized in that it joined to the inner portion and the fitting shape of the transverse member or connecting member by a b.

  According to this configuration, in the three-dimensional structure assembled by the vertical member and the horizontal member or the connection member, a large rainwater storage space can be secured, and at the same time, a flat top plate placed on the top and firmly fixed As a result, the resistance to local shear deformation applied to the upper portion thereof is remarkably improved. That is, for the three-dimensional structure, a vertical space having a predetermined size is required, and a top plate having a predetermined size is required. At this time, for the purpose of reducing the weight of the three-dimensional structure, it is preferable that the weight of the top plate is small, but the strength of the top plate itself is indispensable. Therefore, the present invention provides a bending edge or / and a rib (rib Ra) on the outer peripheral portion of the top plate to reinforce the strength against a large shear stress from the outer periphery of the top plate, and a plurality of inner sides of the rib Ra. By providing the convex rib Rb, the strength of the top plate itself was reinforced. Furthermore, in the verification of such a configuration, by increasing the protrusion height of the rib Rb larger than that of the rib Ra, it is possible to increase the resistance to further shearing stress, and to prevent warping and twisting of the plate surface itself of the top plate. The knowledge that the strength can be remarkably improved was obtained. In addition, it has been found that high strength can be maintained even if the thickness of the rib Rb is reduced in accordance with the increase in the protrusion height. This reduces the increase in the weight of the top plate due to the addition of the ribs Rb and the increase in the height of the protrusion, and balances the problems of strengthening the strength of the member and reducing the weight of the member, which were previously contradictory, and further shearing It became possible to secure strength reinforcement against stress and weight reduction and strengthening of the top plate at the same time. In addition, as for one horizontal member, since the reinforcing function can be ensured by joining with the rib Ra of one top plate, it is necessary to arrange the top plate for every three-dimensional structure as a unit. However, it is not always necessary, for example, every other one can be arranged arbitrarily.

  Further, the formation of the jungle gym structure by the combination of the horizontal member and the vertical member makes it possible to reduce the weight of the entire three-dimensional structure. Furthermore, by assembling these members including the top plate so as to be insertable / removable, it is possible to easily assemble from the individual components, and to reduce the transportation cost by enabling on-site assembly, and It becomes possible to respond flexibly to the shape of the rainwater storage and penetration tank. As a result, it has sufficient resistance to shear deformation including the upper part in particular, and it is possible to form a structure that can secure a large space when assembled and can be easily maintained and inspected, while reducing the weight of the member. Moreover, the structural member for the rainwater storage system can be easily assembled from the individual components and can be assembled on-site to reduce transportation costs and flexibly cope with the shape of the rainwater storage and penetration tank. It became possible to provide. In addition, when the horizontal member and the vertical member are directly joined, the connecting member here is not required as an independent member, but either the horizontal member or the vertical member has a connecting portion that substitutes the function. And

  The present invention is a structural member for the rainwater storage and infiltration system, wherein the rib Ra has a protrusion height larger than the protrusion height on the inner side of the rib Ra and forms a circular shape or a part of the circular shape. Rc is provided, and the rib or the outer surface of the rib Rc is joined to a part or the whole of the inner part of the transverse member or the connecting member in a fitting manner.

  As described above, the ribs Ra and Rb provided on the outer peripheral portion of the top plate have a function of ensuring weight reduction and strengthening of the top plate itself as well as a function of reinforcing the strength against the shear stress. In the verification of such a configuration, the inventor further has, as one embodiment of the rib Rb, a convex rib having a projection height larger than the projection height of the rib Ra and forming a circular shape or a part of the circular shape. By providing Rc and joining a part or the whole of the inner part of the lateral member or the connecting member with the outer surface of the rib Rc in a fitting manner, it is possible to further increase the resistance to shear stress. Obtained knowledge. That is, as a result of verifying the direction and strength of the resistance of the rib to the bending edge and rib arrangement method and the stress direction and strength inside the outer periphery of the top plate, the rib Rc having a high protrusion is joined to this. By receiving the shear stress from the transverse member, the function of the top plate can be further strengthened, for example, the stress can be dispersed.

  The present invention is the above-described structural member for a rainwater storage and infiltration system, wherein a convex portion perpendicular to a flat plate is provided at a part of a corner of the top plate, and any one of the vertical member, the horizontal member, and the connection member is provided. It is characterized by being joined in a fitting manner with a concave-shaped part provided in the part.

  The three-dimensional structure assembled by the vertical member and the horizontal member or connecting member can secure a large rainwater storage space, and at the same time, it is hung on the upper part by the flat top plate placed on the upper part and firmly fixed Resistance to local shear deformation is greatly improved. The present invention further has a function of reinforcing the strength against a large shear stress applied to the upper portion of the three-dimensional structure by joining the top plate to any one of the vertical member, the horizontal member and the connecting member in a fitting manner at the corner. It was verified that it could be secured. That is, in the three-dimensional structure, a stress that causes a large shear deformation not only in the vertical direction but also in the horizontal direction is applied to the upper portion of the three-dimensional structure due to the external force due to the shape of the base and backfilling. Therefore, in addition to the joining of the horizontal member or the connecting member and the rib Ra, a flat top plate having a convex portion at a part of the corner is used, and any one of the vertical member, the horizontal member or the connecting member is used. The joint is joined and the upper surface is entirely or partially covered so that it functions as a wrinkle in this plane to reinforce the strength. A strong resistance can be ensured. In addition, as described above, when the top plate can be joined to the ribs Ra and Rb and has the rib Rc, the three-dimensional structure is formed by three convex shapes having different functions by adding the convex portion. Since it is joined to the body, even if it receives shear stress in various directions and strengths, it is possible to distribute the stress and to further enhance the function of the top plate.

  The present invention is a rainwater storage and penetration system, wherein the structural member according to any one of the above is used, and the rainwater storage space is formed by a three-dimensional structure in which the top plate is placed on a part of the top. Features.

  The rainwater storage and infiltration system formed using the structural members described above has sufficient resistance to shear deformation, can secure a large space, is easy to maintain, and can be easily assembled from individual components. Can do. At this time, the top plate joined on the fitting, which is a feature of the structural member described above, does not necessarily need to be disposed on all the three-dimensional structures as a unit. Even when it is arranged according to the installation conditions of the system, it is possible to ensure a sufficient reinforcing function. Therefore, it is possible to reduce transportation costs by enabling on-site assembly, and for rainwater storage and infiltration systems that can flexibly respond to the shape of the rainwater storage and infiltration tank including the flexibility of the top plate arrangement. A rainwater storage and penetration system including a structural member can be provided.

  The present invention is the above-described rainwater storage and infiltration system, wherein the three-dimensional structure is divided into a plurality of sections including an upper portion on which the top plate is not placed, and the upper space of the three-dimensional structure is divided into the sections. An inspection hole is arranged in the above.

  As described above, by joining one top plate to the upper part of the three-dimensional structure on the fitting, not only the minimum unit forming the three-dimensional structure, but also the resistance to shear deformation in the periphery thereof. Can be strengthened. In addition, the three-dimensional structure may require a vertical space or a horizontal space connected from the upper part of the rainwater storage and infiltration system for maintenance and inspection inside. The present invention comprises a plurality of sections composed of a three-dimensional structure as a plurality of units, and an inspection hole is provided in the space above the three-dimensional structure for each section, thereby providing a space portion for maintenance inspection. At the same time, it is possible to enhance the resistance to shear deformation.

Embodiments according to the present invention will be described in detail with reference to the drawings.
<Structural member for rainwater storage and penetration system according to the present invention>
The structural member for rainwater storage and infiltration system according to the present invention (hereinafter referred to as “the present structural member”) is a three-dimensional structure (hereinafter referred to as “unit block”) that is a unit in which a plurality of vertical members and horizontal members are detachably fitted. Furthermore, a plurality of unit blocks are joined in the vertical direction, the horizontal direction, and the height direction to form a rainwater storage and infiltration system that forms a space portion therein. At this time, if there is a horizontal member, a vertical member, or a connecting member for joining them, there is a flat plate-like shape that is placed on top of a three-dimensional structure (hereinafter referred to as “structure”). The top plate is joined to a planar body constituted by a transverse member or the like by ribs Ra provided on the outer peripheral portion thereof, and has a projection height larger than the projection height inside the rib Ra. A plurality of convex ribs Rb are provided. Furthermore, as one embodiment of the rib Rb, a convex rib Rc having a protrusion height larger than the protrusion height of the rib Ra and forming a circular shape or a part of the circular shape is provided, and an outer surface of the rib Rc A part or the whole of the inner part of the horizontal member or the connecting member is joined in a fitting manner.

  FIG. 1 shows, as a perspective view, one embodiment example of a unit block formed by assembling a transverse member 2 and a longitudinal member 3 using a connecting member 1 as a component of the structural member. As for this structural member, the rib Ra of the top plate P has joined to the horizontal member 2 in this upper part (it mentions later for details). At this time, it is also possible to provide a portion having the same function as the connecting member 1 at the end of the horizontal member 2 or the vertical member 3 and omit the connecting member 1.

[Unit block]
In general, as shown in FIG. 1, a unit body is formed by forming a unit block in which the transverse member 2 and the longitudinal member 3 are approximately equal in size, and joining them vertically and horizontally as a unit. Specifically, in many cases, the unit block is formed with the horizontal member 2 and the vertical member 3 forming the unit block as 400 mm or 800 mm as a standard. At this time, for maintenance and inspection of the entire inside of the rainwater storage and penetration tank, it is possible to move vertically from the inspection hole into the tank, and at the same time, a space of a size that can be moved by a person in the horizontal direction (hereinafter “horizontal”). For example, a space having a side of 800 mm or more or a minimum size that can secure a space of 800 mm or more is preferable. That is, if the unit block is made larger, it is necessary to increase the thickness of the vertical member 3 and the horizontal member 2 in order to ensure the required strength, and the weight of each member increases, resulting in poor operability and workability. . Accordingly, a unit block having a standard length of about 400 to 1600 mm on one side is preferable.

  The unit block is fitted with the upper and lower ends of the four vertical members 3 fitted to the cylindrical portion 1a of the connecting member 1, and is inserted into each of the through holes 1c provided in the protruding portions 1b of the eight joining members 1. The protrusions (not shown) at the ends of the eight transverse members 2 are inserted and engaged, and the transverse member 2 and the longitudinal member 3 are connected. Further, when the structure is manufactured by actually joining the unit blocks, the upper end of the vertical member 3 is fitted to the cylindrical portion 1a of the connecting member 1 and attached to the two vertical members 3. By inserting and engaging a protrusion (not shown) at the end of the transverse member 2 into each of the through holes 1c of the two connecting members 1, the transverse member 2 and the longitudinal member 3 are connected, and this is repeated. A structure is formed in a jungle gym shape. In addition, the assembly procedure of the connection member 1, the horizontal member 2, and the vertical member 3 is not limited to this.

  When the structure member is further formed, the top plate P is disposed on the upper surface of the uppermost unit block assembled in this way, as illustrated in FIGS. 2 (A) to (C). It is characterized by being. Specifically, the rib Ra of the top plate P is joined to the upper end of the planar body composed of the four transverse members 2 and the four joining members 1, and the rib Rb is joined to the planar body. Joined to the inner part in a fitting manner. Thereby, the strength of the plane is reinforced, and a large resistance force to the stress that causes the shear deformation to the transverse member 2 is obtained, and in particular, the unit block against the stress of the shear deformation applied to the upper and side portions of the structure. Can be strengthened.

  Next, the connecting member 1, the transverse member 2, the longitudinal member 3 and the top plate P that constitute such a unit block will be described in detail.

(Connecting member)
As shown in FIG. 1 and FIGS. 2B and 2C, the connecting member 1 includes a cylindrical portion 1 a that can be fitted onto the vertical member 3, and an end portion of the horizontal member 2 that protrudes from four locations on the outer peripheral surface. Has a protrusion 1b that engages and connects the two, and the protrusion 1b has a through hole 1c that receives and engages a protrusion (not shown) provided at the end of the transverse member 2. Four places are formed. Further, a slightly smaller diameter through hole is formed inside the cylindrical portion 1a to reduce weight, and rainwater is moved downward to be stored.

  Here, it is preferable that the inner peripheral surface of the cylindrical portion 1a of the connecting member 1 that is in contact with the end portion of the vertical member 3 is formed as a smooth surface having irregularities of 1 μm or less. When the vertical member 3 is connected to the connecting member 1, the fitting / connecting state between the two is strengthened. In particular, when the surface of the end portion of the vertical member 3 is textured, the airtightness or watertightness can be further enhanced. Here, when the vertical member 3 is not subjected to texturing, it is possible to ensure the same function by texturing the inner peripheral surface of the cylindrical portion 1a.

  Since the connecting member 1 is configured in this way, when the vertical member 3 is fitted to the upper and lower cylindrical portions 1a, the cylindrical portion 1a is appropriately expanded in diameter. While the degree of freedom is somewhat increased, the dimensional flexibility of the vertical member 3 is increased, and the workability is improved. Also, for the connection with the horizontal member 2, the protrusion formed on the horizontal member 2 and the through hole 1 c of the connection member 1 are fitted, and the connection between the connection member 1 and the horizontal member 2 is further strengthened. As a result, the strength of the structure is remarkably improved. In addition, when forming the structure mentioned later, since the vertical member 3 is not connected in the uppermost position of the connection member 1, the cylindrical part 1a toward the top becomes unnecessary. Therefore, while removing the protruding part of the upper part of the cylindrical part 1a, you may make it fit the cap member (not shown) which has a thin disk shaped top part. Instead of the connection member 1, a portion having the same function as the connection member 1 may be provided at the end of the horizontal member 2 or the vertical member 3, and this may be omitted. It is also possible to form the connecting member 1 integrally with the horizontal member 2 or the vertical member 3.

(Horizontal member)
As shown in FIG. 3A, the horizontal member 2 has protrusions 2a that are inserted into and engaged with the through holes 1c of the connection member 1 at both ends on the back side so as to face downward. The transverse member 2 is preferably provided with concave grooves 2b and ribs 2c in order to reduce weight and ensure strength. By providing the groove portion 2b, a large strength can be exerted against the compressive force acting from the longitudinal direction of the transverse member 2, and by providing the rib 2c in the short side direction, the twist acting on the transverse member 2 It can exhibit durability against external force in the direction. The number, position, shape, etc. of the reinforcing ribs can be variously changed. Although FIG. 3A shows a configuration example in which the rib 2c is provided on the front surface, the groove portion 2b can be formed on the entire back surface by providing the rib 2c on the back surface.

  Here, when the top plate P is arranged in the unit block, as illustrated in FIG. 3B, the rib Ra (bending edge) provided on the top plate P is joined to the groove portion 2b, The rib Rb can be fitted to the inner part of the transverse member 2 in a fitting manner. Further, as illustrated in FIG. 3C, ribs Ra (convex ribs) can be joined. With such a configuration, the top plate P can be joined over the entire length of the transverse member 2, and the strength against a large shearing stress applied to the upper part of the structure can be enhanced.

  The material of the transverse member 2 is not particularly limited as long as the strength and harmlessness of the structure is ensured and the material is not altered or corroded by long-term contact with rainwater. A resin material that is lightweight and easy to mold is preferred because of its ease. Specifically, polypropylene, polyethylene, polyvinyl chloride, PET (polyethylene terephthalate) or the like may be used, and various thermoplastic resins can be used as long as necessary strength is obtained.

  In addition, it is also possible to comprise the horizontal member 2 with a plate-shaped body. In addition to strengthening the strength against the shear deformation of the horizontal member 2 itself, a strong resistance against the shear deformation can be ensured as a whole structure by line joining with the vertical member 3. At this time, by forming one or a plurality of openings in the central part of the plate-like body, it is possible to reduce the weight and smoothly transfer stored rainwater or move personnel during maintenance. It becomes. Moreover, when the junction part which has the function similar to the connection member 1 is provided in the one end part or both ends of the horizontal member 2 as mentioned above, the junction with the vertical member 3 is also possible directly without using the connection member 1. It is.

(Vertical member)
The vertical member 3 is preferably formed of a cylindrical body or a rod-like body having a predetermined length, and the cross section preferably has the same shape. In FIG. 1, it has a structure that can be fitted into the tubular portion 1 a of the connecting member 1. Here, the length of the vertical member 3 can be set to an arbitrary length that meets the specifications, and, as will be described later, a structure using this structural member is not suitable for a rainwater storage and infiltration system. Plays an important role. Moreover, in FIG. 1, the case where the fixed vertical member 3 is used is illustrated. At this time, it is preferable to set the shape (outer diameter, thickness, or length) and number of the longitudinal members 3 in accordance with the strength required for the structure, the transportation surface, and the workability during assembly.

  Furthermore, it is preferable that the fitting surface of the front end portion of the vertical member 3 fitted to the cylindrical portion 1a of the connecting member 1 is subjected to a texture process. By applying the embossing process, the tip end portion of the embossing is elastically deformed and can be easily fitted, and the embossed shape is difficult to return. Furthermore, by continuously forming such embossing from the free end to a predetermined position, the airtightness or watertightness at the fitting portion can be enhanced. It is possible to prevent various algae and floating substances from adhering to the inside of the vertical member 3 and the inside of the cylindrical portion 1a of the connecting member 1 generated during long-term use, and maintenance and disassembly of the rainwater storage structure assembly member In the cleaning work, workability can be improved. Specifically, on the outer peripheral surface of the end portion of the vertical member 3 in contact with the connecting member 1, the unevenness is 10-40 μm, and the diameter is slightly increased as the end outer peripheral surface is separated from the tip. A thickened structure can be mentioned.

  The material of the vertical member 3 is not particularly limited, and various materials similar to those of the vertical member 3 can be used. However, from various conditions such as strength, durability, and lightness that require a structure, a resin material such as polypropylene is suitable as with the transverse member 2. Moreover, it can replace with resin and can also be made into metal pipes, such as stainless steel, and you may reinforce by inject | pouring concrete into the inside of a resin vertical member, or inserting reinforced concrete.

  In addition, when the junction part which has the function similar to the connection member 1 is provided in the one end part or both ends of the vertical member 3 as mentioned above, the junction with the horizontal member 2 is also possible directly without using the connection member 1. It is. Moreover, when connecting several vertical member 3 perpendicularly, it is set as the structure (not shown) which can fit one end part of the vertical member 3 with an other end part, and by joining adjacent vertical members 3 mutually, arbitrary A structure having a height (depth) can be formed (the one end portion or the other end portion must have a function of joining to the transverse member 2). Furthermore, in the case of the vertical member 3 having a hollow portion (not shown), a method of inserting a column (not shown) into the hollow portion is also possible.

〔Top board〕
The top plate P has a flat portion as shown in FIG. 2C and a back surface as exemplified in FIGS. 4A to 4G. As illustrated in FIG. 4 (A), the rib Ra provided on the outer peripheral portion of the top plate P is joined to the upper end of the transverse member 2 in a fitting manner, and the entire inner plane runs vertically and horizontally. A plurality of ribs Rb having a protrusion height larger than the protrusion height of the rib Ra is provided, and a part of the rib Rb is joined to the inner portion of the lateral member 2 in a fitting manner. With such a configuration, it is possible to reinforce the strength of the top plate P itself against an overload such as covering soil or torsional stress of the plate, and it is possible to reinforce strength against a large shear stress applied to the upper part of the structure. The top plate P is provided with a hole Ph. Rainwater from the top of the top plate or rainwater collected on the top surface can be introduced into the tank below the top plate as stored water.

  At this time, as one embodiment of the rib Rb, a convex rib Rc as exemplified in the cross-section bb of FIG. 4B so as to form a circular shape or a part of the circular shape inside the rib Ra. As shown in FIG. 4C, it is preferable that the outer surface of the rib Rc is joined to a part or the whole of the inner part of the lateral member 2 or the connecting member 1 in a fitting manner. Further, as shown in FIG. 4D, it is preferable that the protrusion height Lc of the rib Rc is larger than the protrusion height La of the rib Ra. In the case of joining to the transverse member 2 in a fitting manner, by such a structure, the joining portion between the rib Rb and the transverse member 2 is increased, and by joining while being sandwiched between the two of the ribs Ra and Rc, the transverse member 2 is further removed. It is possible to further enhance the function of the top plate, for example, the shear stress can be dispersed. With such a structure, the rib Ra is joined to the upper end of the transverse member 2 to reinforce the strength against a large shear stress applied to the upper portion of the structure, and the transverse member 2 (or the connecting member 1 and the transverse member 2 is formed by the outer surface of Rc. ) Are joined while being sandwiched by two of the ribs Ra and Rc, and the resistance to one layer of shear stress can be further increased.

  Here, the ribs Rb and Rc are analyzed in “Analysis example of resistance to shear deformation of the top plate” to be described later. As a result, in the top plate P having a side of 400 mm, the projection height Ra: projection height Rb (Rc) = It was confirmed that 20 (mm): 40 (mm) = 1: 2 and the thickness was preferably about 2 mm (that is, about 1/10 of the protrusion height Rb). That is, it can be confirmed that the ribs Rb and Rc provided on the top plate P have a higher effect on deformation than the thickness. This is not just a design matter, but has gained knowledge as a standard for the top plate used in such structures.

  More specifically, the rib provided on the top plate P is not limited to the rib Rc provided parallel to the side surface of the top plate P, but also on the rib Rc as illustrated in the section cc in FIG. On the other hand, it is preferable to provide a plurality of ribs Rd perpendicular to each side (five places in FIG. 4 (A)) and to provide rib supports (not shown) corresponding to the ribs on the lateral member 2. In the case of only the rib Rc, high processing accuracy may be required in order to ensure surface bonding with the transverse member 2. By disposing the rib Rd, it is possible to secure reliable bonding while relaxing the surface bonding and to reinforce the strength. In particular, as shown in the cross-section dd in FIG. 4F, by providing a rib Re that rises from the rib Rd joined to the rib Rc to the rib Rc, it is possible to ensure reliable joining while alleviating the surface joining. Can do. FIG. 4G shows a cross section ee of FIG. 4A in which a plurality of ribs Rb are provided.

  Here, the material of the top plate P is not particularly limited as long as the strength and harmlessness of the structure are ensured and the material is not altered or corroded by contact with rainwater for a long time. A resin material that is lightweight and easy to mold is preferred because of the ease of assembly work. Specifically, polypropylene, polyethylene, polyvinyl chloride, PET (polyethylene terephthalate) or the like may be used, and various thermoplastic resins can be used as long as necessary strength is obtained. Moreover, it can replace with resin and can process metal plate-shaped bodies, such as a stainless plate and an aluminum plate.

[Other Embodiments of Top Plate]
As other embodiment of the top plate P, the top plate P in which the convex part Pb perpendicular | vertical to a flat plate was provided in the one or all corner | angular part Pa is illustrated to FIG. 5 (A)-(D). A concave-shaped part (corresponding to the cylindrical part 1a in FIG. 1) provided in a part of any one of the vertical member 3, the horizontal member 2 or the connecting member 1 is joined to the top plate so as to have a structure. By covering the upper surface of the body in whole or in part, it can function as a wrinkle in this plane and ensure a strong resistance against the secondary torsional force caused by the stress applied to the structure. it can. In particular, when the top plate can be joined with the ribs Ra and Rb and has the rib Rc, the convex portion is added to join the three-dimensional structure with three convex bodies having different functions. Therefore, even if shear stress of various directions and strengths is applied, the stress can be dispersed and the function of the top plate can be further enhanced.

  Specifically, convex portions Pb perpendicular to the flat plate P are provided at four corners Pa of the top plate P illustrated in FIG. 5A as illustrated in FIG. Here, when the top plate P is formed of a resin or the like, the convex portion Pb can be manufactured by integral molding, and in the case of a metal plate, for example, as shown in FIG. Thus, it can form by forming corner | angular part Pa and folding up a part of the member in a broken line. 5D to 5E show enlarged details of a state in which the planar body constituted by the four transverse members 2 and the four joining members 1 are joined in a fitting manner. The convex-shaped part Pb is joined to the four cylindrical parts 1a in a fitting manner, thereby reinforcing the strength of the plane and obtaining a large resistance to stress that causes shear deformation in the transverse member 2. The resistance of the unit block can be strengthened against the stress of shear deformation applied to the upper part of the structure.

  Here, it is preferable that the convex part Pb and the inner peripheral surface of the cylindrical part 1a in contact with the convex part Pb are formed on a smooth surface having irregularities of 1 μm or less. When connecting the convex-shaped part Pb to the connection member 1, both fitting and a connection state are strengthened. In particular, when the embossing is performed on the end surface of the convex portion Pb, the airtightness or watertightness can be further enhanced. Here, when the convex part Pb is not subjected to the texturing, it is possible to ensure the same function by applying the texturing to the inner peripheral surface of the cylindrical part 1a.

  At this time, the joining relationship between the top plate P, the connecting member 1 and the transverse member 2 is such that the corner portion Pa and the joining member 1 are joined at all four locations (joining a), and the bending edge Pd or the rib Pe and the transverse portion are transversely formed. It is not necessary to form the bonding (bonding b) of the groove portion of the member 2 at all four places, and even if at least one bonding a and one bonding b are provided at each position, the function of strengthening the resistance to deformation stress from the side is ensured. can do. Specifically, combinations illustrated in FIGS. 6A to 6C-3 can be given. 6A shows the case where the junction a and the junction b are one each, and FIGS. 6B-1 to 6B-3 show the case where there are a total of three locations, FIGS. 6C-1 to 6C-3. ) Shows a part of the combination in the case of a total of four places. 6A and 6B-3, no reinforcement is applied to one corner (connecting member 1), but when a structure is formed, the same reinforcement is applied to the unit block joined thereto. By carrying out, the resistance with respect to the deformation stress from the side can be strengthened. In all other combinations, each corner is reinforced, so that it is possible to remarkably enhance the resistance against deformation stress from the side.

[Example of analysis of resistance to shear deformation of top plate]
Next, the structure of the top plate P and the resistance to shear deformation were analyzed.
(1) Top Table to be Targeted Twelve configuration examples (a) to (p) corresponding to the respective figure numbers of (a) to (p) in FIGS. 7A and 7B were targeted. Specifically, as shown in Table 1 below, the conventional type (a) a member in which ribs having the same height as the outer peripheral part are disposed on the whole) and (b) to (p) different heights from the outer peripheral part. -Targeted thickness 01 and type 12-12 improved top plate thickness. A square top plate having a side of 400 mm was used. In the improved type, optimization (weight reduction) of rib height, wall thickness, etc. was examined by the finite element method (FEM analysis), and compared with a conventional top plate. (G) Modified 06 type to (m) Improved 10 type has a 20 mm height toward the center part for the purpose of distributing the load because stress concentrates on the contact points between the outer peripheral ribs and the existing ribs toward the center part. Added a rib. The basic of the improved type was an edge thickness of 4 mm. As target values, weight: about 20% lighter than conventional type, maximum deflection: conventional type or less, maximum stress: 34 MPa or less, maximum strain: conventional type or less were set.

（２−２）たわみ量（ｍｍ）：負荷を与えたときの変位量を示す。上端部に大きな変位を生じるとともに、分布状態によって各天板における部分的な変位の偏在の有無を評価することができる。
（２−３）最大応力（ＭＰａ）：特定の部位に応力が集中することより部材が破損しやすいと考えられるので、小さい方が荷重分散が上手くできていると評価することができる。解析結果を従来品との比率で表示し、評価した。
（２−４）最大ひずみ（−）：上記（２−３）応力と同様、ひずみが集中することより部材が破損しやすいと考えられるので、小さい方が荷重分散が上手くできていると評価することができる。
（２−５）改良型は、角部の突起部を固定し、辺が梁となる横部材に載った状態とし、上載荷重を８６ｋＮ／ｍ^２とした。 (2) Analysis conditions For each structural example, the following items were analyzed using nonlinear analysis software.
(2-1) Top plate characteristics: PP having the characteristics as shown in Table 2 below was applied using polypropylene resin (PP, manufactured by Nippon Polypro Co., Ltd .: product name “Novatech BCBH”).

(2-2) Deflection (mm): Indicates the amount of displacement when a load is applied. A large displacement occurs at the upper end, and the presence or absence of partial displacement unevenness in each top plate can be evaluated according to the distribution state.
(2-3) Maximum stress (MPa): Since it is considered that the member is more likely to be broken than the stress is concentrated on a specific part, it can be evaluated that the smaller the load is, the better the load distribution is. The analysis results were displayed in the ratio with the conventional product and evaluated.
(2-4) Maximum strain (-): Like the above (2-3) stress, it is considered that the member is more likely to be damaged than the strain is concentrated. Therefore, the smaller the load is, the better the load distribution is evaluated. be able to.
(2-5) In the improved type, the protrusions at the corners were fixed and placed on a horizontal member whose side became a beam, and the upper load was 86 kN / m ² .

(3) Analysis result As a result of the analysis, stress, strain and displacement of each part are shown in FIGS. 7A and 7B. The numerical analysis results are shown in Table 2 below.
(3-1) Assuming that the performance equal to or higher than that of the conventional product is maintained, the deformation of the improved 01 type and the improved 05 type is considerably larger than the deflection amount. Similar results are obtained for strain. As for stress, there was a portion that locally exceeded the tensile strength. The improved type 02 was improved over the conventional type in terms of strain, but the deflection amount and the stress were equal to or lower than those of the conventional type. For the improved 03 type in which the height of the improved 01 type rib is changed from 30 mm to 40 mm, the stress is greatly improved, and the resin reduced by reducing the thickness of the plate is arranged as a new rib efficiently. The amount was reduced by about 20% compared to the conventional type, and the numerical values equivalent to or higher than those of the conventional type were obtained for the items of deflection, stress, and strain in the analysis. Although the improvement 04 type which aimed at weight reduction was improved about stress, the difference in a deflection amount and a distortion was not seen from the conventional type.
(3-2) In the improved 06 type and the improved 07 type, a reduction in stress was confirmed by adding ribs. On the other hand, in the improved 08 type in which the rib toward the center is arranged, the amount of deflection is greatly reduced, but conversely, the stress is excessively concentrated on the contact point of the outer peripheral rib. In the improved 09 type, the height of the rib was set to 40 mm only for the contact with the outer peripheral rib, and the amount of deflection was reduced, but the stress was further concentrated on the contact with the outer peripheral rib. In the improved type 10, stress concentrates on the part where the length of the rib is short. Therefore, in order to secure the length of the rib, the rib is stealed obliquely and the stress is greatly dispersed by lengthening the sides. I was able to.
(3-3) Further, the improved type 11, which further steals the improved type 10, was lower than the improved type 10 in terms of deflection amount and stress. The improved type 12 in which ribs are further added to the improved type 10 is improved over the improved type 10 in all items of deflection and stress.

[Experimental example to verify the effect of improving the smoothness of the top plate]
Next, the experiment of the change of the surface friction coefficient of the top plate P with respect to the shear deformation in the top plate P according to the present invention was conducted. That is, as described above, the top surface P of the top plate P according to the present invention in which the structure is formed has no uneven portion, and a cap or the like is used for joining the vertical member or the horizontal member in the assembly of the structure. There is no need. Here, in order to reduce the influence of external force due to backfilling of the structure, which will be described later, by taking advantage of these characteristics, the friction coefficient is reduced by smoothing the surface of the top plate P, and the influence of the external force can be reduced. It verifies that it has become possible. Specifically, as will be described later, a water shielding sheet may be laid on the top surface of the top plate P after forming the structure on which the top plate P is disposed. Without a water-impervious sheet, for example, a water-permeable sheet (nonwoven fabric) may be laid on the top surface of the top plate P. When there is an uneven portion on the top surface of the top plate P or when joining members with caps, When the upper part is covered with soil, the part may be pulled or rubbed due to a part of the nonwoven fabric. At this time, the top plate P and the structure are subjected to shear stress, which may cause distortion and distortion. The top plate P can fundamentally eliminate the occurrence of such an event, and compared with the conventional product for the reduction of the surface friction coefficient due to the high smoothness as well as the superiority of the form.

(1) Structure used as object The top plate P according to the present invention cut to a width of 200 × 100 (mm) was used as a target and compared with a conventional product.
(2) Experimental method and the shearing speed and 1 mm / sec, loading pressure δn the ^{10.0kN / m 2, 24.5kN / m} 2, 49.0kN / m 2, 73.5kN / m 2, 98.0kN / m The relationship between the relative displacement generated between the top plate P and the non-woven fabric covered with the upper surface and the degree of frictional force τ when the number is changed to the five types of ² is obtained. The maximum frictional force degree τmax up to a relative displacement of 20 mm was obtained, and divided by the loading pressure δn at that time to calculate the friction coefficient (τ / δn).
(3) Experimental results As shown in FIG. 8 (A), the experimental results are shown in the relationship between the relative displacement at each loading pressure δn and the frictional force degree τ for each target top plate when the relative displacement is 2 to 3 mm or more. The stability of the frictional force τ was observed. FIG. 8B shows the relationship between the loading pressure δn and the maximum frictional force degree τmax, and a correlation capable of linear approximation was obtained. FIG. 8C shows the relationship between the top plate P according to the present invention, the loading pressure δn of the conventional product, and the friction coefficient (τ / δn). It has been found that the top plate P can be improved to a very small friction coefficient (τ / δn) and the influence of external force can be reduced.

[About structure]
In the above description, the structure formed mainly in block units has been described. However, the structure forming the rainwater storage and infiltration system is configured by joining the unit blocks in the vertical direction, the horizontal direction, and the height direction. Specifically, by joining the connecting member 1 while the longitudinal member 3 is fitted, and repeatedly joining the connecting member 1 while inserting the transverse member 2 in four directions, the grid-like unit block is expanded vertically and vertically and horizontally. Thus, a structure with an arbitrary size can be formed. As a result, spaces are formed in the vertical direction and the horizontal direction, and personnel can be moved during the circulation or maintenance of rainwater. However, it is possible to insert a horizontal or vertical plate-like body so as to join the horizontal member 2 and the vertical member 3 to form a structure that blocks the vertical space or the horizontal space or a structure that cannot pass through. In particular, the strength against the force from the lateral direction and the oblique direction with respect to the structure can be increased.

  Furthermore, the top plate P is disposed on the uppermost surface of the uppermost part of the structure thus assembled. The specific arrangement state is as described in the above [unit block]. With such a configuration, the strength of the upper part of the structure is reinforced, and a large resistance to stress that causes shear deformation in the transverse member 2 is obtained. In particular, the resistance of not only the unit block but also the entire structure can be strengthened against the stress of shear deformation applied to the upper part of the structure.

  Here, it is not necessary to arrange the top plate P on the upper surface of all the unit blocks that constitute the uppermost part of the structure. For example, as shown in FIG. By providing, sufficient reinforcement can be performed and a vertical space can be secured. That is, the two top plates P1 and P2 are formed in a fitting-like joint by the connection member 11, and similarly, the top plates P1, P2,. 11, 12... Are contacted directly, and sufficient resistance can be secured against the effect from the side. Further, when the rib Ra is provided on the outer peripheral portion of the top plate P, as shown in FIG. 9, since all the lateral members 2 are joined to any of the ribs Ra, the reinforcing function is ensured. can do. As described above, it is not always necessary to dispose the top plate for every structure serving as a unit, and it is possible to dispose them arbitrarily.

[Experimental example]
Next, with respect to the structure, an experiment of resistance to shear deformation when the top plate P according to the present invention was disposed was performed using an experimental apparatus as illustrated in FIG.
(1) Target Structure The unit block illustrated in FIG. 1 is joined “height 4 × width 7 × depth 3”, and the top plate according to the present invention as illustrated in FIG. A structure in which P is disposed and a structure in which a conventional top plate as illustrated in FIG. As the top plate P according to the present invention, the improved type was used.

(2) Experimental method For each structure, place the experimental device shown in Fig. 10 (A), pull the center of the structure, confirm the followability to the deformation of the top plate from the load and displacement, and change the displacement against the tensile load. An experiment was conducted to determine the resistance to shear deformation. Specifically, with respect to the structure 10 to be the target, the uppermost center 10a of the structure 10 is pulled, the load and displacement are measured, and the shear strength characteristics are confirmed. A wire 83, a load cell 84 and a displacement meter 85 are set on a tension jig 82 in the structure 10 installed in the experimental yard, and the tensile load (shear) measured by the load cell 84 is pulled while being pulled by a forklift 87 via a tensioning device 86. Force) and the amount of displacement measured by the displacement meter 85, the resistance characteristics against the shear deformation of each structure 10 are grasped, and the state in which the structure 10 is deformed is confirmed.

(3) Experimental results As a result of the experiments, a graph having a difference as shown in FIG. 11 could be obtained. It can be seen that the structure with the improved top plate has superior resistance to shear deformation compared to the structure with the conventional top plate. Specifically, since the conventional type does not have a structure for obtaining a reaction force against deformation, the improved top plate has an effect of about 1000 N with a displacement of 60 mm or more. As for the detachment of the member due to the displacement (deformation amount), the conventional top plate gradually begins to deviate from a load of about 2800 N and a displacement of about 50 mm, whereas the improved top plate jumps at a load of 6000 N and a displacement of 90 mm. It came off. The load and displacement are improved about twice.

<Rainwater storage and penetration system according to the present invention>
A rainwater storage and infiltration system according to the present invention (hereinafter referred to as “the present system”) is characterized by using any of the structural members described above and making it possible to form vertical and horizontal spaces. That is, this system has sufficient resistance to shear deformation, and can secure a large space and is easy to maintain and inspect. In addition, since it can be easily assembled from individual components, it is possible to reduce the transportation cost by enabling on-site assembly, and to flexibly cope with the shape of the rainwater storage and penetration tank.

  12 (A) and 12 (B) illustrate one embodiment of the present system. The structure 10 is divided into a plurality of sections 20 including an upper portion on which the top plate P is not placed. Each is characterized in that an inspection hole 21 is provided in the upper space of the structure 10. With such a configuration, it is possible to prepare a rainwater storage and penetration tank that secures a space for maintenance and at the same time has enhanced resistance to shear deformation.

  Hereinafter, the case where this system is assembled using this structural member will be described mainly with reference to FIG. In forming this system, first, a ground recess (hereinafter sometimes referred to as a pit) of about 1 to 5 m is excavated and formed in the ground, a side groove 11 is formed around the pit, and crushed stone, sand, etc. are formed on the bottom surface of the pit. The foundation 12 is formed by laying and constructing and leveling. After laying a water-impervious sheet 13 as a water-impervious material on the surface, the section 20 composed of the unit block composed of the resin vertical member 3 and the horizontal member 2 is formed, and further expanded and expanded. The structure 10 corresponding to the internal volume of the pit is arranged. At this time, instead of the foundation 12 formed by laying crushed stone or the like, it is possible to ensure higher smoothness by forming with concrete. In this system, a case where one section 20 is formed by an alternating structure as shown in FIG. 9 is illustrated, unit blocks U are arranged in a column in the center of the section 20, and the sections 20 Is bounded by a side wall 22. Here, when the internal volume of the pit is large, the structure 10 may be assembled in the pit, or after the structure 10 is assembled outside the pit, it may be arranged in the pit. The assembled structure 10 is preferably fastened and fixed with a belt made of resin or metal. Next, the top plate P is disposed on the upper portion of the structure 10. Here, as shown in FIG. 12B, a case where every other top plate P is arranged is illustrated.

  Next, the side surface portions 14 and 14 of the structure 10 arranged in the pit are backfilled as necessary, and a piping 15 is laid so as to allow rainwater to flow into the pit from the side groove 11. Cover the upper surface with a water shielding sheet 13 (can be unnecessary when the top panel P is disposed on the upper surface of most unit blocks), and then cover the soil about 0.5 to 2 m above it. To cover soil 16. These water-impervious sheet 13 and covering soil 16 on the upper surface form a covering layer. In addition, inspection holes 21 may be provided at a plurality of locations of the covering layer 16. Instead of covering the structure 10 with the water shielding sheet 13, rainwater may be infiltrated by covering with a water permeable sheet. The side groove 11 has a slightly deep bottom so that a mud reservoir 17 is formed at the bottom.

  Here, the size of the structure 10 is arbitrarily set according to the required specifications, but (1) securing the required internal volume of the rainwater storage and penetration tank, and (2) maintenance and inspection are possible. In addition to ensuring a sufficient space and opening, (3) the weight of the unit block to be loaded and the strength to withstand compression by the covering soil 16 are required, for example, the length and depth in FIG. It is preferable that the height is about several meters to several tens of meters, and the height is about 1/5 to 2 times the height.

The structure 10 preferably has a compressive strength of at least 108 kN / m ² or more. If it does in this way, even if it covers about 2 m of covering soil (load: about 36 kN / m < ² >) on the top, it has sufficient intensity | strength which becomes 3 times or more of earth pressure. Specifically, when the longitudinal member 3 having a length of about 80 cm and the transverse member 2 having a length of about 80 cm are combined, the length of the longitudinal member 3 is 1.56 pieces / m ² , and at least a compressive strength of about 69.2 kN / It is preferable to use a longitudinal member 3 having a book. However, sufficient strength can be ensured even if it is ½ or less by the reinforcing function of the horizontal member 2 joined to the vertical member 3 in a fitted state.

  In this way, rainwater is temporarily stored and used for various purposes such as watering gardens, washing water, emergency water, etc., and an adjustment function that can gradually discharge a large amount of rainwater is provided. be able to. And since the curing period etc. are unnecessary compared with the case where it comprises with concrete, the construction speed of a rainwater storage structure can be made markedly faster.

  The rainwater storage structure according to the present invention is not limited to the use as a tank for storing and using rainwater, but can also be used as a biotope or the like.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which illustrates one embodiment of the unit block of the structural member for rainwater storage and penetration systems which concerns on this invention. Explanatory drawing which illustrates arrangement | positioning of the top plate to a unit block. Explanatory drawing which illustrates the structure of the horizontal member which concerns on this invention. Explanatory drawing which illustrates the structure of the top plate which concerns on this invention. Explanatory drawing which illustrates the structure of the top plate which concerns on this invention. Explanatory drawing which illustrates a joining state with the top plate which concerns on this invention. Explanatory drawing which shows the analysis result about the structure of a top plate, and the resistance force with respect to a shear deformation. Explanatory drawing which shows the analysis result about the structure of a top plate, and the resistance force with respect to a shear deformation. Explanatory drawing which illustrates the structure of the structure which concerns on this invention. Explanatory drawing which illustrates the structure of the structure which concerns on this invention. Explanatory drawing which illustrates the apparatus which tests the shear strength characteristic of the top plate arrange | positioned at the structure. Explanatory drawing which illustrates the shear strength characteristic experimental result of the top plate arrange | positioned at the structure. Explanatory drawing which illustrates the rainwater storage penetration system which concerns on this invention. Explanatory drawing which illustrates the rainwater storage structure which concerns on a prior art.

Explanation of symbols

1 Connection member 1a Concave shape part (tubular part)
1b Protrusion 1c Through-hole 2 Horizontal member 2a Protrusion 2b Groove 2c, Ra, Rb, Rc Rib 3 Vertical member P Top plate Pa Corner

Claims (5)

A plurality of vertical members and horizontal members are detachably fitted to form a unit three-dimensional structure, and the unit three-dimensional structure is formed by joining a plurality of members in the vertical direction, the horizontal direction, and the height direction. If there is a connecting member that forms a space in the interior and is placed on top of the three-dimensional structure and connects the vertical member, the horizontal member, or these, there is a connection with the connecting member. In the structural member for a rainwater storage and penetration system having a flat top plate to be
A bent edge or / and a convex rib (also referred to as “rib Ra”) perpendicular to the flat plate is provided on the outer peripheral portion of the top plate and joined to the upper end of the side portion of the corresponding transverse member or connecting member. In addition, a plurality of convex ribs Rb having a projection height larger than the projection height is provided inside the rib Ra, and the ribs Rb are joined to the inner portion of the lateral member or the connection member in a fitting manner. A structural member for a rainwater storage and infiltration system.   A convex rib Rc having a projection height larger than the projection height and forming a circular shape or a part of the circular shape is provided on the inner side of the rib Ra, and the lateral member or connection is provided by an outer surface of the rib Rc. The structural member for a rainwater storage and infiltration system according to claim 1, wherein the structural member is joined to a part or the whole of the inner part of the member in a fitting manner.   A convex part perpendicular to the flat plate is provided at a part of the corner of the top plate, and the concave part provided in a part of any one of the vertical member, the horizontal member or the connecting member is joined in a fitting manner. The structural member for a rainwater storage and infiltration system according to claim 1 or 2.   A rainwater storage and infiltration system using the structural member according to any one of claims 1 to 3 and forming a rainwater storage space by a three-dimensional structure in which the top plate is placed on a part of the top. .   The three-dimensional structure is divided into a plurality of sections including an upper portion on which the top plate is not placed, and an inspection hole is disposed in the upper space of the three-dimensional structure for each section. Item 5. A rainwater storage and penetration system according to Item 4.

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