Penetrating member

Abstract

To secure a drainage function when necessary, facilitate piping continuity, and enable one product number to be used for concrete structures of various thicknesses, thereby reducing costs and facilitating inventory management. [Solution] A penetrating member 1 that forms a through hole R in a concrete structure comprises a first through hole forming member 10 that extends from one axial end of the through hole R toward the other and forms a first space R1 inside, and a second through hole forming member 20 that extends from the other axial end of the through hole R toward one side and is arranged so as to overlap the inner or outer surface of the first through hole forming member 10, and forms a second space R2 inside that communicates with the first space R1.

Description

[Technical Field]

[0001] The present disclosure relates to a penetration member used in forming a penetration hole in a concrete structure such as a building foundation. [Background technology]

[0002] For example, there are cases where a through hole is formed in the foundation of a building to pass a pipe from the outdoors to the indoors or vice versa. When forming this through hole, a void pipe made of a paper tubular member or a resin, metal, or ceramic tubular member disclosed in Patent Documents 1 and 2 is used.

[0003] When forming a foundation through-hole using the above-mentioned tubular member, first, the tubular member is fixed to reinforcing bars before pouring the concrete that will form the foundation. Then, formwork is installed so as to close the indoor and outdoor openings of the tubular member. Concrete is poured into the installed formwork, and after the concrete has hardened, the formwork is removed. If a void pipe is used, the void pipe is removed, but if the foundation through-hole sleeve described in Patent Documents 1 and 2 is used, the tubular member is left in place. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-52282 [Patent Document 2] Japanese Patent Application Publication No. 2024-101704 Summary of the Invention [Problem to be solved by the invention]

[0005] However, since the cylindrical members are fixed to the reinforcing bars, they are installed at a position higher than the foundation floor of the building. Therefore, if the foundation floor is flooded due to heavy rain or river flooding, for example, the water cannot be drained outside the building through the cylindrical members, resulting in poor drainage efficiency.

[0006] Furthermore, since the cylindrical member is installed at a position higher than the foundation floor of the building, for example, when laying piping within the foundation, the piping must be bent vertically, which is time-consuming on-site and increases the total piping length.

[0007] Therefore, it is possible to consider using drainage components and piping conduction components that can be installed on the foundation floor surface rather than being fixed to the reinforcing bars, but such drainage components and piping conduction components are generally standard components and have predetermined dimensions.

[0008] However, the thickness of the concrete structure in which the through hole is to be formed is not constant, but varies depending on the type, structure, scale, etc. For this reason, it is necessary to prepare drainage members and piping conduction members of different dimensions for each thickness of the concrete structure, but doing so increases the number of production lots, leading to higher costs, and also increases the number of inventory items, making inventory management more complicated.

[0009] The present disclosure has been made in consideration of these points, and its purpose is to ensure drainage function when necessary, facilitate piping continuity, and enable one product number to be used for concrete structures of various thicknesses, thereby reducing costs and facilitating inventory management. [Means for solving the problem]

[0010] To achieve the above object, one aspect of the present disclosure can be based on a penetrating member for forming a through hole in a concrete structure. The penetrating member includes, for example, a first through-hole-forming member that extends from one axial end of the through hole formed in the concrete structure to the other and forms a first space therein, and a second through-hole-forming member that extends from the other axial end of the through hole formed in the concrete structure to one side and is arranged to overlap with the inner or outer surface of the first through-hole-forming member and forms a second space therein that communicates with the first space.

[0011] According to this configuration, by pouring concrete with the first through-hole forming member and the second through-hole forming member installed in, for example, an existing concrete structure, a through hole that penetrates the concrete structure in the thickness direction is formed by the first space inside the first through-hole forming member and the second space inside the second through-hole forming member. By installing the first through-hole forming member and the second through-hole forming member on, for example, the foundation floor surface of the concrete structure, the through hole is formed at a low position, so that when the foundation floor surface is flooded due to heavy rain disasters, river flooding, etc., water can be efficiently drained through the through hole and there is no need to bend the piping in the vertical direction when laying it.

[0012] Furthermore, because the second through-hole-forming member overlaps the first through-hole-forming member, the amount of overlap can be increased or decreased in the axial direction. Increasing the amount of axial overlap between the first through-hole-forming member and the second through-hole-forming member makes it possible to form a through-hole with a short axial length. Conversely, decreasing the amount of axial overlap between the first through-hole-forming member and the second through-hole-forming member makes it possible to form a through-hole with a long axial length. In other words, by changing the amount of overlap between the first through-hole-forming member and the second through-hole-forming member, a through-hole with a length equivalent to the thickness of the concrete structure can be obtained. This eliminates the need to prepare members with different dimensions for each thickness of the concrete structure, and allows through holes to be formed in concrete structures of various thicknesses with a single product number.

[0013] The overlapping portion of the first through-hole-forming member and the second through-hole-forming member may be bonded over the entire circumference of the through hole, thereby preventing relative displacement of the first through-hole-forming member with respect to the second through-hole-forming member and suppressing leakage of water or concrete from between the first through-hole-forming member and the second through-hole-forming member.

[0014] At least one of the first through-hole forming member and the second through-hole forming member may be provided with a scale indicating the length of the through hole to be formed in the concrete structure, i.e., the length of the penetrating member. This makes it possible to know in advance the length of the through hole formed by the first through-hole forming member and the second through-hole forming member, thereby improving workability on site.

[0015] A pair of flange portions may be formed on the lower part of the first through-hole-forming member, the flange portions being spaced apart in the radial direction of the through-hole and extending in the axial direction of the through-hole. In this case, the portion of the first through-hole-forming member between the pair of flange portions may be configured to have a first bulging portion that bulges upward and extends in the axial direction of the through-hole, forming the first space therein. The second through-hole-forming member may be disposed so as to overlap the inner surface of the first bulging portion. This allows the pair of flange portions of the first through-hole-forming member to be used as installation portions for the existing concrete structure, thereby stabilizing the first through-hole-forming member.

[0016] An adhesive material that adheres to the existing concrete structure may be attached to the lower surfaces of the pair of flanges, thereby making it possible to fix the first through-hole forming member so that it does not move relative to the existing concrete structure before concrete is poured.

[0017] The second through-hole-forming member may have a cylindrical shape extending in the axial direction of the through hole, which increases the strength of the second through-hole-forming member when pressed in the radial direction, thereby suppressing crushing of the second through-hole-forming member due to the weight of concrete during pouring.

[0018] The first through-hole-forming member may have a cylindrical shape extending in the axial direction of the through hole. The second through-hole-forming member may be disposed outward of the first through-hole-forming member. This increases the strength of the first through-hole-forming member when pressed in the radial direction, thereby suppressing crushing of the first through-hole-forming member due to the weight of concrete during pouring.

[0019] The bottom of the first through-hole forming member may be formed to be approximately flat. This allows the first through-hole forming member to be stabilized when placed on an existing concrete structure. The second through-hole forming member can be formed to be open downward and to cover the part of the first through-hole forming member other than the bottom from the outside.

[0020] An adhesive material that adheres to the existing concrete structure may be attached to the bottom of the first through-hole forming member, thereby making it possible to fix the first through-hole forming member so that it does not move relative to the existing concrete structure before concrete is poured.

[0021] The second through-hole forming member may be tubular and extend in the axial direction of the through hole. The first through-hole forming member may be disposed inside the second through-hole forming member. This allows both the first through-hole forming member and the second through-hole forming member to be tubular, thereby preventing the through-hole member from being crushed by the weight of concrete during pouring. [Effects of the Invention]

[0022] As described above, the technology disclosed herein can ensure drainage function when necessary, facilitate piping continuity, and can form through holes in concrete structures of various thicknesses with a single product number, thereby reducing costs and facilitating inventory management. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a vertical cross-sectional view of a concrete structure in which a penetrating member according to a first embodiment of the present invention is used. [Figure 2] FIG. 2 is a plan view of a base plate on which a penetrating member according to the first embodiment is placed. [Figure 3] FIG. 3 is a vertical cross-sectional view of a base plate on which a penetrating member according to the first embodiment is placed. [Figure 4] FIG. 4 is a perspective view of a first through-hole-forming member according to the first embodiment. [Figure 5] FIG. 5 is a perspective view of a second through-hole-forming member according to the first embodiment. [Figure 6] FIG. 6 is a front view of the second through-hole forming member according to the first embodiment. [Figure 7] FIG. 7 is a plan view of the second through-hole forming member according to the first embodiment. [Figure 8] FIG. 8 is a perspective view of a second through-hole forming member according to a modified example of the first embodiment. [Figure 9] FIG. 9 is a plan view of the substructure. [Figure 10] FIG. 10 is a perspective view of a first through-hole-forming member according to the second embodiment. [Figure 11] FIG. 11 is a perspective view of a second through-hole forming member according to the second embodiment. [Figure 12] FIG. 12 is a perspective view of a second through-hole forming member according to a modified example of the second embodiment. [Figure 13] FIG. 13 is a view equivalent to FIG. 1, showing a case where the penetrating member is fixed to the main reinforcement. [Figure 14] FIG. 14 is a front view showing a case where the penetrating member is fixed to the main reinforcement. [Figure 15] FIG. 15 is a view equivalent to FIG. 1 showing the case of a continuous foundation specification. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its applications, or its uses. For example, the relative size and positional relationship of each component shown in the drawings are for the purpose of explaining one embodiment and do not limit the present invention.

[0025] <Embodiment 1> 1 is a longitudinal cross-sectional view of a concrete structure 100 in which a penetrating member 1 according to a first embodiment of the present invention is used. The concrete structure 100 to which the present invention can be applied is not particularly limited, but examples thereof include foundation structures that form the foundations of various buildings. Examples of buildings include houses, offices, stores, factories, warehouses, etc.

[0026] When the concrete structure 100 is a foundation structure, the concrete structure 100 has a base 101 and a foundation wall 102 extending upward from the base 101. The base 101 is an existing concrete structure, and the foundation wall 102 is a concrete structure that will be constructed after the base 101 is constructed. The foundation wall 102 is provided with a plurality of main reinforcements 103 extending vertically and a plurality of distribution reinforcements 104 extending horizontally. The plurality of main reinforcements 103 are provided at intervals from one another in the direction in which the foundation wall 102 extends. The lower portions of the main reinforcements 103 reach the base 101. The plurality of distribution reinforcements 104 extend horizontally to connect the main reinforcements 103 and are provided at intervals from one another in the up-down direction. The main reinforcements 103 and distribution reinforcements 104 are so-called reinforcing bars.

[0027] The foundation wall 102 has a through-hole (foundation through-hole) R formed therethrough in the thickness direction. The through-hole R is a hole for passing, for example, a pipe (not shown) from the indoor side to the outdoor side or from the outdoor side to the indoor side, or for passing a pipe through the foundation wall 102 indoors. The pipe may be, for example, a PVC pipe made of polyvinyl chloride, but is not limited thereto. It may also be a flexible pipe such as a hose, or a pipe for carrying electrical wiring or communication lines. The vertical and width dimensions of the through-hole R may be set to match the diameter of the pipe passing through it and are generally set to be sufficiently larger than the diameter of the pipe. The width direction of the through-hole R corresponds to the left-right direction in FIGS. 2 and 3 . Therefore, the width direction of the through-hole R is also referred to as the left-right direction. The through-hole R can also be used to drain water that has seeped inside the foundation wall 102.

[0028] Fig. 2 is a plan view of the base plate 101 on which the penetrating member 1 is placed, and Fig. 3 is a vertical cross-sectional view of the base plate 101 on which the penetrating member 1 is placed. Figs. 2 and 3 show the state before the concrete that forms the foundation wall 102 is poured. As shown in Figs. 2 and 3, the penetrating member 1 is placed on an existing concrete structure and positioned, and then the concrete that forms the foundation wall 102 is poured and embedded in the foundation wall 102, thereby forming the through hole R in the foundation wall 102.

[0029] The thickness dimension of the foundation wall 102 is the dimension in the left-right direction in FIG. 1. The thickness dimension of the foundation wall 102 varies depending on the type, structure, and scale of the building. For example, the thickness dimension of the foundation wall 102 can vary between 150 mm and 200 mm. One type of penetrating member 1 is a member for forming through holes R that penetrate through the thickness direction in foundation walls 102 of various thicknesses. Note that the thickness dimension of the foundation wall 102 is not limited to the above-mentioned dimension, and it can be thinner than 150 mm or thicker than 200 mm.

[0030] The axial direction of the through hole R is the longitudinal direction of the through hole R and coincides with the thickness direction of the foundation wall 102. In this embodiment, the left side in Fig. 1 is defined as one axial direction of the through hole R, and the right side in Fig. 1 is defined as the other axial direction of the through hole R, but this definition is for the convenience of explaining the embodiment and does not limit the present invention.

[0031] The penetrating member 1 includes a first through-hole-forming member 10 and a second through-hole-forming member 20. The first through-hole-forming member 10 and the second through-hole-forming member 20 are made of a resin material such as vinyl chloride. By making the first through-hole-forming member 10 and the second through-hole-forming member 20 out of vinyl chloride, the first through-hole-forming member 10 and the second through-hole-forming member 20 can be bonded together with an adhesive at the construction site.

[0032] The first through-hole-forming member 10 and the second through-hole-forming member 20 can have the same thickness, but this is not a limitation and one may be thicker than the other. Furthermore, the first through-hole-forming member 10 and the second through-hole-forming member 20 can be made of the same material, but this is not a limitation and they may be made of different materials.

[0033] The first through-hole-forming member 10 is a member that extends from one axial end of the through hole A formed in the foundation wall 102 by the penetrating member 1 to the other axial end, and forms a first space R1 therein. The second through-hole-forming member 20 is a member that extends from the other axial end of the through hole R formed in the foundation wall 102 by the penetrating member 1 to one axial end, and forms a second space R2 therein. In this embodiment, the length of the first through-hole-forming member 10 is longer than the length of the second through-hole-forming member 20. Therefore, the length of the first space R1 is longer than the length of the second space R2. The lengths of the first through-hole-forming member 10 and the second through-hole-forming member 20 may be the same, or the length of the first through-hole-forming member 10 may be shorter than the length of the second through-hole-forming member 20.

[0034] The second through-hole-forming member 20 is arranged so as to overlap the inner surface of the first through-hole-forming member 10. As a result, the first through-hole-forming member 10 and the second through-hole-forming member 20 form a single through-hole member 1. The overlapping portion of the first through-hole-forming member 10 and the second through-hole-forming member 20 is bonded over the entire circumferential direction of the through-hole R. When the second through-hole-forming member 20 is arranged so as to overlap the inner surface of the first through-hole-forming member 10, the first space R1 and the second space R2 communicate with each other. The first space R1 and the second space R2 communicate with each other to form a through-hole R that is continuous from one axial end to the other axial end of the through-hole member 1. The second through-hole-forming member 20 may also be arranged so as to overlap the outer surface of the first through-hole-forming member 10.

[0035] As shown in FIG. 4, a pair of flange portions 11, 11 are formed on the lower portion of the first through-hole forming member 10. The flange portions 11, 11 are spaced apart from each other in the radial direction of the through-hole R and extend in the axial direction of the through-hole R. That is, the flange portions 11, 11 extend to the left and right sides, respectively, on the lower portion of the first through-hole forming member 10. The flange portions 11, 11 are rectangular in plan view. The left flange portion 11 and the right flange portion 11 have the same shape and size. An adhesive material 11a that adheres to the base plate 101 is attached to the lower surfaces of the pair of flange portions 11, 11. The adhesive material 11a is made of an adhesive material whose main component is, for example, butyl rubber. The adhesive material 11a is provided across both longitudinal ends of the lower surfaces of the flange portions 11, 11.

[0036] The portion between the left and right flange portions 11, 11 in the first through-hole forming member 10 has a first bulging portion 12 that bulges upward and extends in the axial direction of the through-hole R, forming a first space R1 therein. The longitudinal direction of the first bulging portion 12 coincides with the axial direction of the through-hole R. Both ends of the first bulging portion 12 in the longitudinal direction are open, and the first space R1 can communicate with the outside of the first bulging portion 12 via the open portions at both ends.

[0037] The first bulging portion 12 is also open downward. Specifically, the portion between the left and right flange portions 11, 11 is open downward. The cross section of the first bulging portion 12 in the vertical direction perpendicular to the longitudinal direction is arc-shaped. Because the first bulging portion 12 has an arc-shaped cross section that bulges upward, the first through-hole forming member 10 is less likely to deform due to the downward force acting when pouring concrete. As shown in FIG. 1 etc., the second through-hole forming member 20 is arranged so as to overlap the inner surface of the first bulging portion 12.

[0038] 5 to 7 show the second through-hole-forming member 20. The longitudinal direction of the second through-hole-forming member 20 coincides with the axial direction of the through-hole R. The second through-hole-forming member 20 has a pair of left and right lower plate portions 21, 21 and a second bulging portion 22. The lower plate portions 21, 21 are provided on the left and right sides of the second through-hole-forming member 20, respectively. The left lower plate portion 21 extends inward (to the right) of the second through-hole-forming member 20 at the lower end of the second through-hole-forming member 20 and has a rectangular shape extending in the axial direction of the through-hole R. The right lower plate portion 21 extends inward (to the left) of the second through-hole-forming member 20 at the lower end of the second through-hole-forming member 20 and has a rectangular shape extending in the axial direction of the through-hole R.

[0039] The second bulging portion 22 is a portion that bulges upward and extends in the axial direction of the through hole R, forming a second space R2 therein. The longitudinal direction of the second bulging portion 22 coincides with the axial direction of the through hole R. Both ends of the second bulging portion 22 in the longitudinal direction are open, and the second space R2 can communicate with the outside of the second bulging portion 22 via the open portions at both ends.

[0040] The second bulge portion 22 is also open downward between the left and right lower plate portions 21. Specifically, the portion between the left and right lower plate portions 21, 21 of the second through-hole-forming member 20 is open downward. A cross section of the second bulge portion 22 in a vertical direction perpendicular to the longitudinal direction has an arc shape that is approximately similar to the cross section of the first bulge portion 12 of the first through-hole-forming member 10. As shown in FIG. 1 and other figures, the second bulge portion 22 of the second through-hole-forming member 20 is disposed so as to overlap the inner surface of the first bulge portion 12 of the first through-hole-forming member 10, so that the radius of the arc-shaped portion constituting the second bulge portion 22 is smaller than the radius of the arc-shaped portion constituting the first bulge portion 12. The outer peripheral surface of the second bulge portion 22 and the inner peripheral surface of the first bulge portion 12 are in contact over the entire circumferential direction. This allows the outer peripheral surface of the second bulging portion 22 to be bonded over the entire circumferential direction to the inner peripheral surface of the first bulging portion 12. Furthermore, since the second bulging portion 22 has an arc-shaped cross section that bulges upward, the second through-hole forming member 20 is less likely to deform due to the downward force acting when pouring concrete.

[0041] A plurality of scales 22a are provided on the outer peripheral surface of the second bulging portion 22 of the second through-hole forming member 20. In this embodiment, five scales 22a extending in the circumferential direction of the second bulging portion 22 are provided at intervals from one another in the axial direction of the through-hole R. The five scales 22a are equally spaced apart. The interval between adjacent scales 22a can be set to, for example, 10 mm.

[0042] The scale 22a indicates the length of the through hole R formed in the foundation wall 102 by the penetrating member 1, i.e., the length of the penetrating member 1. The following markings are provided: a "160 (mm)" marking 10 mm to one side (left side in FIG. 2) from the other end (end located on the right side in FIG. 2) of the second through-hole-forming member 20; a "170 (mm)" marking 20 mm to one side from the other end of the second through-hole-forming member 20; a "180 (mm)" marking 30 mm to one side from the other end of the second through-hole-forming member 20; a "190 (mm)" marking 40 mm to one side from the other end of the second through-hole-forming member 20; and a "200 (mm)" marking 50 mm to one side from the other end of the second through-hole-forming member 20.

[0043] For example, when the axial length of the through hole R in the first through hole-forming member 10 is 150 mm, by positioning the second through hole-forming member 20 so that the "200" marking 22a of the second through hole-forming member 20 coincides with the other end of the first through hole-forming member 10, as shown in FIG. 2, the second through hole-forming member 20 protrudes by 50 mm from the first through hole-forming member 10. As a result, the axial length of the penetrating member 1 (the length of the through hole R) is 200 mm, which is the sum of "150 mm" of the first through hole-forming member 10 and the "50 mm" protrusion dimension of the second through hole-forming member 20. In this case, the second through hole-forming member 20 is positioned so that only a portion on one side of the "200" marking 22a of the second through hole-forming member 20 overlaps with the first through hole-forming member 10.

[0044] Furthermore, although not shown, by positioning the second through-hole-forming member 20 so that the "190" marking 22a of the second through-hole-forming member 20 coincides with the other end of the first through-hole-forming member 10, the second through-hole-forming member 20 protrudes by 40 mm from the first through-hole-forming member 10. As a result, the axial length of the penetrating member 1 is 190 mm, which is the sum of "150 mm" of the first through-hole-forming member 10 and the "40 mm" protrusion dimension of the second through-hole-forming member 20. In this case, the second through-hole-forming member 20 is positioned so that only the portion on one side of the "190" marking 22a overlaps with the first through-hole-forming member 10, and therefore the overlapping range between the first through-hole-forming member 10 and the second through-hole-forming member 20 is wider than in the case of 200 mm.

[0045] Similarly, by positioning the second through-hole-forming member 20 so that the "180" graduation 22a of the second through-hole-forming member 20 coincides with the other end of the first through-hole-forming member 10, the axial length of the penetrating member 1 becomes 180 mm. Furthermore, by positioning the second through-hole-forming member 20 so that the "170" graduation 22a of the second through-hole-forming member 20 coincides with the other end of the first through-hole-forming member 10, the axial length of the penetrating member 1 becomes 170 mm. Furthermore, by positioning the second through-hole-forming member 20 so that the "160" graduation 22a of the second through-hole-forming member 20 coincides with the other end of the first through-hole-forming member 10, the axial length of the penetrating member 1 becomes 160 mm. In this way, the axial length of the penetrating member 1 can be changed in 10 mm increments. Generally, the thickness of the foundation wall 102 is measured in 10 mm increments, such as 150 mm or 180 mm, so by setting the intervals between the scales 22a to 10 mm, it is possible to accurately accommodate a variety of thicknesses.

[0046] The number of graduations 22a may be six or more, or may be four or less. The interval between adjacent graduations 22a is not limited to 10 mm, but may be less than 10 mm or more than 10 mm. The length of the first through-hole-forming member 10 is not limited to 150 mm, but may be less than 150 mm or more than 150 mm. The numbers on the graduations 22a may be changed according to the length of the first through-hole-forming member 10.

[0047] Although not shown, the second through-hole-forming member 20 can also be disposed so as to overlap the outer surface of the first through-hole-forming member 10. For example, by omitting the lower plate portion 21 of the second through-hole-forming member 20 and making the radius of the second bulging portion 22 larger than the radius of the first bulging portion 12, the second through-hole-forming member 20 can be overlapped on the outer surface of the first through-hole-forming member 10. In this case, a plurality of scales (not shown) similar to the scale 22a can be provided on the outer peripheral surface of the first bulging portion 12 of the first through-hole-forming member 10.

[0048] 8 shows a second through-hole-forming member 20 according to a modification of embodiment 1. The second through-hole-forming member 20 according to the modification of embodiment 1 has a cylindrical shape extending in the axial direction of the through-hole R, and is disposed so as to overlap the inner surface of the first through-hole-forming member 10. A bottom plate portion 23 of the second through-hole-forming member 20 extends in the left-right direction and in the axial direction of the through-hole R, and is substantially flat.

[0049] <Construction instructions> Next, a construction procedure for the penetrating member 1 of embodiment 1 will be described. When constructing the penetrating member 1 of embodiment 1, first, the thickness of the foundation wall 102 is determined based on design drawings or the like. If the thickness of the foundation wall 102 is, for example, 200 mm, the second through-hole-forming member 20 is positioned so that the "200" marking 22a of the second through-hole-forming member 20 coincides with the other end of the first through-hole-forming member 10, as shown in FIG. 2. Then, the first through-hole-forming member 10 and the second through-hole-forming member 20 are bonded together to prepare a penetrating member 1 having a length of 200 mm.

[0050] Concrete is also poured to construct the base plate 101. The penetrating member 1 is placed on the upper surface of the base plate 101. At this time, the adhesive material 11a attached to the lower surfaces of the flange portions 11, 11 of the first through-hole forming member 10 is pressed against the upper surface of the base plate 101 to adhere it. This positions the penetrating member 1 at a predetermined position on the upper surface of the base plate 101.

[0051] Then, a formwork (not shown) for constructing the foundation wall 102 is installed. After the formwork is installed, concrete for the foundation wall 102 is poured. When pouring the concrete, the flow pressure of the concrete acts on the penetrating member 1, but because the penetrating member 1 is positioned on the upper surface of the base plate 101 by the adhesive material 11a, the penetrating member 1 does not shift position. Furthermore, the weight of the concrete acts on the penetrating member 1, but because the first through-hole-forming member 10 and the second through-hole-forming member 20 have the arc-shaped first bulge portion 12 and the arc-shaped second bulge portion 22, respectively, deformation of the penetrating member 1 is suppressed. Furthermore, the thickness is doubled at the portion where the first bulge portion 12 of the first through-hole-forming member 10 and the second bulge portion 22 of the second through-hole-forming member 20 partially overlap, increasing the strength of this portion, which also suppresses deformation of the penetrating member 1.

[0052] <Action and effect> As described above, with the penetrating member 1 according to this embodiment, by pouring concrete with the first through-hole forming member 10 and the second through-hole forming member 20 constituting the penetrating member 1 placed on the upper surface of the base plate 101, a through-hole R that penetrates the foundation wall 102 in the thickness direction is formed by the first space R1 inside the first through-hole forming member 10 and the second space R2 inside the second through-hole forming member 20. Because the first through-hole forming member 10 and the second through-hole forming member 20 are placed on the upper surface of the base plate 101, the through-hole R is formed at a low position, and as a result, if the upper surface of the base plate 101 is flooded, water can be efficiently drained through the through-hole R.

[0053] FIG. 9 is a plan view of a foundation structure, showing a case in which the foundation wall 102 includes a perimeter foundation wall 102a and an indoor foundation wall 102b. The perimeter foundation wall 102a is formed along the perimeter of the building and has a frame-like shape in plan view. A plurality of indoor foundation walls 102b are formed vertically and horizontally within the perimeter foundation wall 102a. The perimeter foundation wall 102a and the indoor foundation wall 102b form multiple compartments inside the perimeter foundation wall 102a. In this structure, by installing the penetrating members 1 in the perimeter foundation wall 102a and the indoor foundation wall 102b, it is possible to form drainage routes for draining flooding from each compartment to the outside of the perimeter foundation wall 102a, as indicated by the arrows. The formation of such drainage routes is possible because the penetrating members 1 are installed low, allowing the through holes R to be formed at a height close to the top surface of the base plate 101.

[0054] Furthermore, there are cases where piping (not shown) is laid inside the outer periphery foundation wall 102a. In this case, the installation position of the penetrating member 1 is low and the through-hole R is formed at a height close to the upper surface of the base plate 101, so that the piping laid on the upper surface of the base plate 101 can be extended to each partition through the through-hole R without having to bend in the vertical direction.

[0055] Furthermore, because the second through-hole-forming member 20 overlaps with the first through-hole-forming member 10, the amount of overlap can be increased or decreased in the axial direction of the through hole R. Increasing the amount of overlap between the first through-hole-forming member 10 and the second through-hole-forming member 20 in the axial direction shortens the length of the penetrating member 1, making it possible to form a through hole R with a short axial length. Conversely, decreasing the amount of overlap between the first through-hole-forming member 10 and the second through-hole-forming member 20 in the axial direction lengthens the length of the penetrating member 1, making it possible to form a through hole R with a long axial length.

[0056] That is, by the simple method of changing the amount of overlap between the first through-hole-forming member 10 and the second through-hole-forming member 20, a through-hole R of a length equivalent to the thickness of the foundation wall 102 can be obtained. This eliminates the need to prepare members of different dimensions for each thickness of the foundation wall 102, making multi-lot production unnecessary. In addition, a single product number of the penetrating member 1 can be used to form the through-hole R in concrete structures of various thicknesses. As a result, it is possible to reduce the cost of the penetrating member 1 and make it easier to manage the product types.

[0057] <Embodiment 2> Fig. 10 is a perspective view of a first through-hole-forming member 10 according to embodiment 2, and Fig. 11 is a perspective view of a second through-hole-forming member 20 according to embodiment 2. In embodiment 2, the structures and shapes of the first through-hole-forming member 10 and the second through-hole-forming member 20 are different from those of embodiment 1. Hereinafter, the same parts as in embodiment 1 will be assigned the same reference numerals and their description will be omitted, and different parts will be described in detail.

[0058] As shown in FIG. 1 , the first through-hole-forming member 10 according to the second embodiment has a cylindrical shape extending in the axial direction of the through hole R. The bottom plate portion (bottom) 13 of the first through-hole-forming member 10 extends in the left-right direction and in the axial direction of the through hole R and is substantially flat. An adhesive material 11a that adheres to an existing concrete structure is attached to the lower surface of the bottom plate portion 13 of the first through-hole-forming member 10. The top plate portion 14 of the first through-hole-forming member 10 extends in the left-right direction and in the axial direction of the through hole R. The pair of side plate portions 15, 15 of the first through-hole-forming member 10 extend in the up-down direction and in the axial direction of the through hole R. The left-right dimension of the first through-hole-forming member 10 is set longer than the up-down dimension. This allows the formation of a through hole R that is wide in the left-right direction. The connection portion between the top plate portion 14 and the side plate portion 15 of the first through-hole-forming member 10 is formed in an arc-shaped surface.

[0059] The second through-hole-forming member 20 shown in FIG. 11 is disposed outside the first through-hole-forming member 10. The second through-hole-forming member 20 has an upper plate portion 24 disposed so as to overlap the outer surface of the upper plate portion 14 of the first through-hole-forming member 10, and side plate portions 25, 25 disposed so as to overlap the outer surfaces of the side plate portions 15, 15 of the first through-hole-forming member 10. The space between the pair of side plate portions 25, 25 of the second through-hole-forming member 20 is open downward. This results in the second through-hole-forming member 20 covering from the outside the portions of the first through-hole-forming member 10 other than the bottom plate portion 13. The portions other than the bottom plate portion 13 of the first through-hole-forming member 10 are the outer surfaces of the upper plate portion 14 and the side plate portions 15, 15 of the first through-hole-forming member 10.

[0060] The second through-hole-forming member 20 may be formed so as to be disposed inside the first through-hole-forming member 10. That is, the second through-hole-forming member 20 may be configured to have an upper plate portion 24 disposed so as to overlap the inner surface of the upper plate portion 14 of the first through-hole-forming member 10, and side plate portions 25, 25 disposed so as to overlap the inner surfaces of the side plate portions 15, 15 of the first through-hole-forming member 10.

[0061] The connection portion between the upper plate portion 24 and the side plate portion 25 of the second through-hole forming member 20 is formed in an arc shape, similar to the connection portion between the upper plate portion 14 and the side plate portion 15 of the first through-hole forming member 10. In addition, the outer peripheral surface of the second through-hole forming member 20 is provided with a plurality of scales 22a similar to the scale 22a of the first embodiment.

[0062] FIG. 12 shows a second through-hole-forming member 20 according to a modification of the second embodiment. The second through-hole-forming member 20 according to the modification of the second embodiment has a cylindrical shape extending in the axial direction of the through hole R and is disposed so as to overlap the inner surface of the first through-hole-forming member 10. That is, the penetrating member 1 has the second through-hole-forming member 20 having a cylindrical shape extending in the axial direction of the through hole R, and this second through-hole-forming member 20 is disposed inside the first through-hole-forming member 10 and bonded thereto, thereby being integrated. The bottom plate portion 23 of the second through-hole-forming member 20 extends in the left-right direction and in the axial direction of the through hole R and is substantially flat. The penetrating member 1 is formed by inserting the second through-hole-forming member 20 according to the modification of the second embodiment into the first through-hole-forming member 10 of the second embodiment.

[0063] The first through-hole-forming member 10 may be disposed inside the second through-hole-forming member 20. In this case, the first through-hole-forming member 10 is formed to have a smaller cross section than the second through-hole-forming member 20. This allows the first through-hole-forming member 10 to be inserted into the second through-hole-forming member 20 and disposed inside the second through-hole-forming member 20.

[0064] The penetrating member 1 of embodiment 2 can be installed using the same construction method as that of embodiment 1. Furthermore, like embodiment 1, the penetrating member 1 of embodiment 2 can ensure drainage function when necessary and facilitate piping continuity, and moreover, can form through holes R in concrete structures of various thicknesses with one product number, thereby reducing costs and facilitating inventory management.

[0065] The above-described embodiments are merely examples in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention.

[0066] As shown in Figures 13 and 14, the penetrating member 1 according to the modified example of the second embodiment can also be fixed to the main reinforcement 103. In this case, a fixing member 40 is used to fix the penetrating member 1 to the main reinforcement 103. The fixing member 40 has a main reinforcement fixing portion 41 that is fixed to the main reinforcement 103. The main reinforcement fixing portion 41 is formed so as to surround the main reinforcement 103, and a portion of its circumferential direction is open. The main reinforcement 103 can be fixed to the main reinforcement 103 by inserting the main reinforcement 103 into the main reinforcement fixing portion 41 through the open portion of the main reinforcement fixing portion 41 and then fastening the main reinforcement fixing portion 41.

[0067] The fixing member 40 has a holding portion 42 that holds the penetrating member 1. The holding portion 42 is formed to surround the penetrating member 1. For example, with the penetrating member 1 placed inside the holding portion 42, the penetrating member 1 can be fixed to the holding portion 42 by fastening the holding portion 42. The fixing member 40 also has a connecting portion 43 that extends from the main reinforcement fixing portion 41 to the holding portion 42.

[0068] The main reinforcement fixing portion 41 of the fixing member 40 can be fixed at any height relative to the main reinforcement 103. This allows the installation height of the penetrating member 1 to be adjusted.

[0069] Figure 13 shows a case where the foundation structure is a strip footing. Figure 15 shows a base 101 and foundation wall 102 in the case of a strip footing. In the case of a strip footing, a concrete slab 110 is poured. In this way, the present invention can also be applied to the case of a strip footing. [Industrial Applicability]

[0070] As described above, the penetrating member according to the present disclosure can be used, for example, when forming a through hole in the foundation of various buildings. [Explanation of symbols]

[0071] 1 Penetrating member 10 First through-hole forming member 11 Flange 11a Adhesive material 20 Second through-hole forming member 102 Foundation wall (concrete structure) R through hole R1 First space R2 2nd space

Claims

1. A penetrating member for forming a through hole in a concrete structure, a first through-hole forming member extending from one axial end of the through-hole toward the other axial end and forming a first space therein; a second through-hole forming member extending from the other axial end of the through-hole toward one side, arranged so as to overlap the inner surface of the first through-hole forming member, and forming a second space therein that communicates with the first space, A pair of flange portions are formed on a lower portion of the first through-hole forming member, the flange portions being spaced apart from each other in the radial direction of the through-hole and extending in the axial direction of the through-hole, An adhesive material that adheres to the existing concrete structure is attached to the lower surfaces of the pair of flange portions, A penetrating member, wherein the portion between the pair of flange portions in the first through-hole forming member has a first bulging portion that bulges upward, extends in the axial direction of the through hole, is open downward, and forms the first space therein.

2. The penetrating member according to claim 1, a through-hole forming member in which the overlapping portion of the first through-hole forming member and the second through-hole forming member is bonded over the entire circumferential direction of the through-hole;

3. The penetrating member according to claim 1, At least one of the first through-hole forming member and the second through-hole forming member is provided with a scale indicating the length of the through-hole.

4. The penetrating member according to claim 1, The second through-hole forming member is a tubular penetrating member extending in the axial direction of the through-hole.

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