JP4448898B2 - Spacer with through hole and concrete structure using the same - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention is capable of draining rainwater stored in the pavement of drainage pavement constructed mainly for the purpose of alleviating hydroplaning phenomenon in rainy weather, improving recognition in rainy night, and reducing noise due to vehicle running. The present invention relates to a concrete structure using a spacer .
[0002]
[Prior art]
The drainage pavement is a pavement in which a surface layer having a thickness of 40 mm to 50 mm is made into a drainage pavement using a porous asphalt mixture having a porosity of about 20%, and an impervious pavement is provided in the lower layer. In the side gutter made of concrete, rainwater that has permeated into the drainage pavement is blocked by the side wall, so it is necessary to provide a through hole at the position of the impermeable pavement surface.
[0003]
In order to manufacture a lid-type U-shaped side groove such as a road reinforced concrete side groove by a conventional method, as shown in FIG. 15 (a), a through hole is formed in one side plate 71 of a formwork 70 whose top and bottom are reversed. The insert 72 is screwed with a bolt, and after inserting a reinforcing bar lattice to which a spacer for maintaining a specified reinforcing bar cover is inserted, concrete is injected, and as shown in FIG. After removing the bolt from the mold 70 and removing the lid-type U-shaped side groove 10 with the through-hole insert 72 attached from the mold 70, the through-hole insert 72 must be punched out as shown in FIG. 15 (c). I must.
[0004]
Alternatively, Japanese Patent Application Laid-Open No. 10-315215 discloses a technique in which a roller or an arm is used for engagement between a frame of a mold and a side plate, and the mold is removed without removing the through hole insert from the side plate.
[0005]
[Problems to be solved by the invention]
However, since the thickness of the side wall 13 of the lid-type U-shaped side groove 10 is 40 mm to 60 mm and the center of the through hole 9 is located 30 mm to 40 mm from the top end face 11, the side wall when punching through the through hole insert 72 is used. 13 is easy to break, so the side wall 13 is thickened, or it is supported by the cross-sectional box-type culvert side groove shown in FIG. 13, but the weight is increased and the manufacturing is complicated. The technique disclosed in Japanese Patent No. -315215 has a complicated formwork and has a problem in durability and workability of the formwork.
[0006]
Therefore, in the present invention, by using a spacer provided with a through-hole, a concrete structure having a through-hole mainly for drainage pavement, which can be manufactured with the same workability and cost as a conventional non-porous concrete structure. It is to provide things.
[0007]
[Means for Solving the Problems]
The spacer of the present invention is used as a reinforcing member for a concrete structure. The spacer for holding a reinforcing bar lattice made of vertical and horizontal reinforcing bars in a mold frame while retaining a prescribed reinforcing bar cover amount is used. A through hole is provided in the axial direction of the cross-section holding portion that holds and fixes the fogging amount.
[0008]
Moreover, the concrete structure formed using the spacer described above is characterized in that it has drainage of external rainwater through a water guide route that passes through the through hole of the spacer.
[0009]
【Example】
Examples of the concrete structure using the spacer of the present invention will be described with reference to the drawings. FIGS. 1 to 8 are examples of the spacer, and FIGS. 9 to 12 and 14 are concrete structures using the spacer . This is an example.
[0010]
FIG. 1 is a perspective view showing an example of the spacer of the present invention, FIG. 2 is a front view and a side view of the spacer, and the spacer 1 is mounted in the vicinity of the joint between the vertical reinforcing bar S1 and the horizontal reinforcing bar S2 of the lattice reinforcing bar. In the state, it is arrange | positioned near the end surface 12 of the side wall 13 upper part of a concrete structure.
[0011]
The top end surface holding portion 2 is inserted into the protruding portion of the vertical reinforcing bar S1, the vertical reinforcing bar S1 and the top end surface 11 are secured to the specified top end reinforcing bar cover amount K1, and a structure extension is provided on the lower side surface of the top end surface holding portion 2 Horizontally in the direction, the end surface holding part 3 is connected, and the horizontal reinforcing bar holding part 5 is arranged at two positions on the lower surface thereof to sandwich the horizontal reinforcing bar S2, and the end surface holding part 3 connects the horizontal reinforcing bar S2 and the end surface 12 to each other. A cross-section holding portion that secures a specified end face rebar cover amount K2, has a vertical column 7 connected to the lower portion of the top end surface holding unit 2, and has a through hole 9 in the transverse direction at the tip of the vertical column 7 4 is connected, and a vertical reinforcing bar holding portion 6 is arranged on the side surface of the cross-section holding portion 4, and the vertical reinforcing bar S 1 is inserted to secure the amount of side wall covering between the lattice reinforcing bars S 1, S 2 and the side wall 13, and the penetration The inner bottom surface of the hole 9 is arranged at the same height as the impermeable pavement surface H2.
[0012]
In the embodiment of FIG. 3 (a), the cross section holding portion 4 provided with the through holes 9 is provided with two horizontal reinforcing bar holding portions 5 arranged on the upper surface of the end face holding portion 3 and the end face holding portion 3 arranged below. The structure is simplified by using a separate cap spacer 100 for the top end surface holding portion, which is connected by the vertical support column 7 and the vertical reinforcing bar holding portion 6 is disposed on the side surface of the cross section holding portion 4.
[0013]
In the embodiment of FIG. 3 (b), the vertical support 7 disposed below the horizontal reinforcing bar holding part 5 is connected to the cross-section holding part 4 provided with the through hole 9, and the vertical reinforcing bar is clamped on the side surface of the cross-sectional holding part 4. Two end portions 6 are arranged on the top and bottom, and the top end surface holding portion and the side end surface holding portion use separate cap spacers 100, thereby simplifying the structure and making the both holding portions unnecessary. It is effective for use outside.
[0014]
In the embodiment of FIG. 4 (a), the lower part of the horizontal reinforcing bar holding part 5 and the upper part of the cross section holding part 4 provided with the through-hole 9 are connected by the vertical support column 7, and the side face of the cross sectional holding part 4 and the vertical reinforcing bar holding part 6 are horizontal. In the embodiment shown in FIG. 4 (b), which is connected by the support column 8 and simplified from the above-described embodiments with each holding portion being one place, the vertical reinforcing bar holding portions 6 are arranged at both ends of the horizontal support column 8, and the horizontal support column 8 is connected to the upper part of the cross-section holding part 4 provided with the through-hole 9, and the spacer 1 is connected to the vertical reinforcing bar. It can be held on either the left or right side of S1.
[0015]
FIG. 5 is an embodiment showing the cross-sectional shape of the through-hole 9 of the cross-section holding portion 4 provided with the through-hole 9, and in FIG. 5 (a), the through-hole 9 is elongated and can correspond to drainage pavement portions having different thicknesses. In FIG. 5 (b), the through-hole 9 is made horizontally long, the cross-sectional area of the through-hole 9 is widened so that a large amount of rainwater can be guided, and the number of spacers attached can be reduced.
[0016]
FIG. 6 is a view showing only the cross-section holding portion 4 in the embodiment showing the side face of the cross-section holding portion 4 provided with the through-hole 9. In FIG. 6A, the outer periphery of the cross-section holding portion 4 is horizontal and the through-hole 9 is formed. Inclined low from the pavement side toward the inside of the concrete structure so that the rainwater introduced can be drained quickly. In FIG. horizontal struts 8 are arranged in the spacer 1 and horizontally positionable, concrete structure inside of the obstacle, thereby avoiding FIG 4 Machimizo桝60 top of grating frame an analogy, FIG 6 (c) Then, the bottom face of the cross-section holding part 4 spreads horizontally and the side face and the top face spread in a funnel shape on the pavement side, thereby preventing clogging of the through-holes 9 due to the aggregate of the drainage pavement part.
[0017]
FIG. 7 shows an embodiment of a method for adjusting the length of the cross-section holding portion 4 provided with the through-hole 9. FIG. 7A shows only the cross-section holding portion 4, and the cross-section holding portion 4 has a central portion. Both ends are formed into a bellows shape 101 and can be expanded and contracted to accommodate various cross-sectional thicknesses. In addition, pressure contact with the mold is possible, preventing leakage of paste into the through hole 9 when pouring concrete. In FIG. 7 (b), the cross-section holding part 4 and the reinforcing bar holding part 102 are formed separately, and the reinforcing bar holding part 102 has a circular reinforcing bar holding part 5 on the upper side and a vertical reinforcing bar holding part 6 on the side. It is formed of a tubular band lacking about ¼ of the circumference, and an outer peripheral groove portion 103 arranged one step lower in the center of the cross-section holding portion 4 is sandwiched to form an integral spacer.
[0018]
FIG. 8 shows an example of the end face of the cross-section holding part 4 provided with the through-hole 9, and shows only the end face. In FIG. 8 (a), the end face is inclined at an acute angle from the outer periphery toward the inner face, and the tip is thin. It is formed with an inclined section 104 formed in a pleat shape, and by extending the cross-section holding part 4 extension several mm longer than the cross-section extension of the concrete structure, the fold part is crushed when assembling the mold and the cross-section holding part 4 and the formwork are in close contact with each other. 8 can prevent paste leakage into the through-hole 9 when pouring concrete. In FIG. 8 (b), there is a step 105 inside the end face of the cross-section holding part 4, and a water-permeable pipe such as a synthetic fiber mesh tube or spiral tube can be inserted. By forming the permeable pipe in the drainage pavement, the drainage in the pavement can be performed quickly, and the drainage pavement can be prevented from being clogged.
[0019]
In the concrete structure corresponding to drainage pavement using the spacer of the present invention, when the side groove cover 20 shown in FIGS. 9 and 10 is fitted to the side groove 10, the side groove top end face 11 and the side groove cover top end face 21 have the same height. The falling lid type U-shaped side groove 10, the gate-shaped variable gradient side groove 30 formed by both side walls 32 and the top end beam 31 and the bottom shown in FIG. The noise prevention type side groove 40, which is an example of a side groove having a space in the joint surface between the side groove 40 and the side groove lid side surface 23, a cross-section box type culvert type closed by the side walls 52, the top end face 51, and the bottom face 55 shown in FIG. There are a side groove 50, a street lamp 60 having a grating lid 61 shown in FIG.
[0020]
In the embodiment of the lid type U-shaped side groove 10 of FIG. 9, a plurality of through holes 9 of the spacer 1 are arranged on the pavement side wall 13 on the side groove 10 in accordance with the height of the impermeable pavement surface. The side groove lid 20 that is fitted and connected to the side groove 10 is provided with a side wall groove 25 in the extending direction in accordance with the height of the through-hole 9 of the side groove 10, and both or one of the end faces 22 is provided. The rain water conduit formed obliquely inward from the top end surface 21 is connected to the end surface 22 connected from the through hole 9 of the spacer 1 disposed in the side groove 10 through the side wall groove 25 of the side groove cover 20. After flowing into the side groove lid hanging portion 14 from the space between the lower and lower spaces, it is drained into the side groove.
[0021]
In the embodiment of the drop lid type U-shaped side groove 10 in FIG. 10, one of the side groove lids 20 to be fitted, in which several grooves 15 are arranged in the transverse direction in the lid hooking portion 14 of the side groove 10 shown in FIG. The side surface 26 is inclined inward from the height of the upper portion of the through hole 9 of the spacer 1 disposed in the side groove 20, and the rainwater conduit is covered by the through hole 9 disposed in the side groove 10. It passes through the space between the hanging portion 14 and the side wall 26 of the side groove lid 20 and is drained from the groove 15 of the lid hanging portion 14 into the side premises.
[0022]
In the embodiment of the variable gradient side groove 30 shown in FIG. 11, both sides of the end face 22 of the conventional side groove cover 20 are inclined obliquely inward from the top end face 21, and when the side groove cover 20 is adjacent, A through-hole 9 is disposed at a space position below the end face 22 of the side groove side wall 32 where there is a product having a space. A through-hole of rainwater flows from the through-hole 9 through the lid portion 33 into the side groove. In order to arrange 9 in the spatial position, there are a method of using a spacer in which the length of the horizontal column 8 is adjusted and a method of using a reinforcing bar grid in which the interval between the vertical reinforcing bars S1 in the side wall 32 is adjusted. When using rebar grids with adjusted spacing, structural calculations must be performed to ensure the specified load strength.
[0023]
In the embodiment of the noise prevention type side groove 40 of FIG. 12, each time the side groove cover 20 is extended on the pavement side wall 42, one of the side groove 40 having the lid hanging portion 43 formed of a concave arc surface and the bottom surface 27 is centered. The front and rear surfaces are formed by a convex arc surface having the same circle as the concave arc surface of the lid hanging portion 43, and are formed by a side groove lid 20 having a side cutout portion 28 at the upper portion of the flat surface. The rainwater guide path formed by arranging the spacer 1 on the side wall 42 with respect to the notch 28 is drained in the flow side groove from the through hole 9 of the spacer 1 to the cover hanging portion 43. Moreover, the side groove for the drainage pavement is formed by arranging the spacer 1 of the present invention in the space portion in the side groove having a space in the lid hanging portion and the side groove lid joint surface.
[0024]
In the reference example of the culvert type side groove 50 of FIG. 13, the top end face 51 is thicker than the drainage pavement, and the spacer 1 is located below the drainage pavement at the lower part of the water-permeable member fitting part 53 that is recessed one step outside the side wall. arrangement, and the water permeability member 54 into the fitting portion 53 is fitted is formed, the water guide paths of rainwater is drained to the through hole 9 of the street gutter from the permeable member 54.
[0025]
In the embodiment of the street lamp 60 in FIG. 14, the height of the receiving frame 62 of the grating lid 61, which is provided with an openable / closable grating lid 61 on the top, is about 50 to 60 mm, which is the same as the drainage pavement thickness. Since the spacer 1 cannot be installed horizontally, the water-conducting path of rainwater using the spacer 1 equipped with the horizontal support 8 in FIG. 6B is drained into the street 60 through the through hole 9.
[0026]
Moreover, by arranging the spacer provided with the through hole of the present invention at a position lower than the position corresponding to the drainage pavement, it can be adopted for drainage countermeasures in the roadbed in general pavement and drainage countermeasures of the permeable pavement, In addition to the concrete structure of the example, the upper lid type U-shaped side groove, L-shaped retaining wall, fence plate, etc. are all used for the reinforced concrete structure manufactured by fixing the reinforcing bars between the molds with spacers. Is done.
[0027]
【The invention's effect】
As described above, a concrete structure using a spacer having a through hole according to the present invention can be manufactured in the same work process as a conventional non-porous product at the time of manufacture, and has excellent productivity. Since there is no product damage at the time of molding, it is not necessary to reinforce the wall thickness, and the product can be provided at the same unit price as the non-porous product.
[0028]
In addition, the conventional formwork for non-porous products can be used to handle the drainage water conduit with only a spacer with a through-hole or a slightly modified formwork to secure the spacer and the water conduit. It is excellent in both production and sales, such as not requiring new capital investment.
[Brief description of the drawings]
1 is a perspective view of a spacer used in a concrete structure according to claim 1. FIG. 2 is a front view and a side view of a spacer used in the concrete structure of FIG. 1. FIG. 3 is a concrete structure according to claim 1. Fig. 4 is a perspective view of a spacer used in combination with a cap spacer used in an object . Fig. 4 is a perspective view illustrating a reinforcing bar holding portion of a spacer used in a concrete structure according to claim 1. Fig. 5 is a concrete according to claim 1. FIG. 6 is a perspective view illustrating a cross-sectional shape of a through hole of a spacer used in a structure . FIG. 6 is a perspective view illustrating a vertical cross-sectional shape of a cross-section holding portion of a spacer used in a concrete structure according to claim 1. perspective view for explaining a length adjustment of the cross holding portion of the spacer used in the concrete structure according to claim 1 8 concrete structure according to claim 1 Perspective view illustrating an end face shape of the through hole of the spacer used in the object 9 is a perspective view of落蓋formula U-shaped groove according to claim 1 [10]落蓋formula U-shaped according to claim 1 perspective view of the gutter 11 is a perspective view of a perspective view and FIG. 12 anti-noise type gutter according to claim 1 of the variable slope type gutter according to claim 1 13 perspective underdrain type gutter according to claim 1 FIG. 14 is a perspective view of the street according to claim 1. FIG. 15 is a cross-sectional explanatory diagram in the case where a lid-type U-shaped side groove is manufactured according to the prior art.
DESCRIPTION OF SYMBOLS 1 Spacer 2 Top end surface holding | maintenance part 3 Side end surface holding | maintenance part 4 Section holding | maintenance part 5 which provided the through-hole Horizontal reinforcing bar clamping part 6 Vertical reinforcing bar clamping part 7 Vertical support | pillar 8 Horizontal support | pillar 9 Through-hole 10 Drop lid type U-shaped side groove 20 Side groove Lid 30 Variable gradient type side groove 40 Noise prevention type side groove 50 Dark fence type side groove 60 Street fence 70 Formwork 100 Cap spacer H1 Drainable pavement surface H2 Impervious pavement surface K1 Top end surface rebar cover amount K2 Side end rebar cover amount K3 Side wall Rebar cover amount S1 Vertical rebar S2 Horizontal rebar

Claims (1)

A concrete structure having a water conveyance path through a through-hole, wherein the through-hole has a cross-section holding portion for holding and fixing a reinforcing bar cover between the molds so as to be substantially orthogonal to the reinforcing bar grid. Formed by using a spacer provided with a through hole in the axial direction of the cross-section holding portion, and the water guide path is at the same height as the bottom surface inside the through hole entrance of the spacer and the impervious pavement surface of the drainage pavement. A concrete structure that is disposed and drains rainwater stored in the drainage pavement.

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