JP2014169591A - Floor slab drainage pipe, and bridge deck drainage system construction method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor slab drainage pipe that can be installed without the need for a dedicated hanger and that has higher corrosion resistance.SOLUTION: A floor slab drainage pipe (10) includes a body (12) that has an inverted truncated cone-shaped main part (12a) and a cylindrical part (12b) arranged below the main part and having a diameter almost equal to a diameter of an undersurface of the main part, and a drainage pipe (14) that is arranged below the body. A through-hole (12d) is provided in the center of the body. A plurality of spacers (12e) are attached at predetermined intervals to an outer surface of the main part of the body.

Description

  The present invention relates to a floor slab drain pipe and a bridge surface drainage system construction method using the floor slab drain pipe.

  Conventionally, the drainage of the bridge surface of the bridge is guided to a desired location by installing a floor drainage pipe at a predetermined location on the bridge surface and connecting a flexible pipe or the like to the lower end of the floor drainage pipe. It is configured.

  In the construction of the bridge surface drainage system as described above, in the new construction work, it is necessary to install the floor slab drain pipe by fixing it to the surrounding rebar, and to cast concrete and fix it. However, it was necessary to make a hole in the existing concrete floor slab, insert a floor sewage drain pipe, and fix it with an adhesive. In such a case, particularly in the repair work, it was necessary to temporarily fix the drainage pipe to the concrete frame so that the drainage pipe does not fall until the filled adhesive is cured.

  On the other hand, the drainage pipe is usually formed of a galvanized steel pipe. However, in recent years, the design guidelines have been revised, and the use of a material having higher corrosion resistance has been demanded.

  The present invention has been developed in view of such a situation, and can be installed without the need for a dedicated hanging tool, and is more highly corrosion-resistant floor slab drainage pipe and the floor slab water The purpose is to provide a method for constructing a drainage system for a bridge surface that uses a drain pipe.

  A floor slab drain pipe according to claim 1 of the present invention has a main part of a reverse truncated cone shape, and a cylindrical part disposed below the main part and having a diameter substantially the same as the diameter of the lower surface of the main part. A main body and a drain pipe arranged below the main body, a through hole is provided in the center of the main body, and a plurality of spacers are attached to the outer surface of the main part of the main body at a predetermined interval. It is characterized by being.

  The floor slab drain pipe according to claim 2 of the present application is the cylinder according to claim 1, wherein the drain pipe has an inner diameter slightly larger than an outer diameter of the cylindrical portion of the main body. The outer surface of the boundary between the main portion and the cylindrical portion is formed in a rounded taper shape, and the upper end of the drainage pipe is connected to the main body. It is formed in a rounded taper shape so as to match the outer surface when fitted to the cylindrical portion.

  The floor slab drain pipe according to claim 3 of the present application is characterized in that in the floor slab drain pipe of claim 1 or 2, the main body is formed of concrete, mortar or cement.

  The floor slab drainage pipe according to claim 4 of the present application is the floor slab drainage pipe according to any one of claims 1 to 3, so as to cover the upper end of the through hole of the main body. Further, a plate with a drain hole is further provided.

  A method for constructing a bridge surface drainage system using the floor slab drainage pipe according to any one of claims 1 to 4 according to claim 5 is the floor slab. Drilling a hole having a diameter slightly larger than the outside diameter of the floor slab drainage pipe at the location of the concrete frame where the drainage pipe is to be installed, and drilling a counterbore hole at the upper end of the hole And, when the floor slab drain pipe is inserted into the hole, after sticking a seal tape at a position located at the lower end of the hole, inserting the floor slab drain pipe into the hole; Filling a gap between the hole and the floor slab drain pipe with a liquid adhesive.

  According to the present invention, since the main body of the floor slab drainage pipe is formed in a reverse truncated cone shape, a dedicated hanging tool is unnecessary at the time of construction, and the bridge surface drainage system can be constructed easily and quickly. it can. Moreover, since the load can be supported in a larger area by forming the connection portion between the drain pipe and the main body into a rounded taper shape, the stress acting on the main body can be reduced. Moreover, good corrosion resistance can be obtained by making the drain pipe with stainless steel. Furthermore, by forming the main body from concrete, mortar, or cement, good adhesion to the floor slab waterproof layer can be obtained.

It is the partial cutaway exploded view which showed each component of the floor slab drain pipe which concerns on preferable embodiment of this invention. 2A is a view taken along line 2a-2a in FIG. 1, FIG. 2B is a view seen along line 2b-2b in FIG. 1, and FIG. It is the figure seen along line 2c-2c of 1. It is sectional drawing which united each component of FIG. It is the schematic which showed the whole bridge surface drainage system. It is an enlarged view of the part 5 of FIG. 6 (a) to 6 (f) are diagrams showing a series of procedures for constructing the bridge drainage system, FIG. 6 (g) is an enlarged view of a portion 6g of FIG. 6 (f), and FIG. h) is a view taken along line 6h-6h in FIG. 6 (g).

  Next, a floor slab drain pipe according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded view of each component of a floor slab drain pipe according to a preferred embodiment of the present invention. A floor slab drain pipe according to a preferred embodiment of the present invention, generally indicated by reference numeral 10 in FIG.

  The main body 12 has a reverse truncated cone shape as a whole. Here, the “reverse truncated cone shape” means a shape obtained by turning the truncated cone shape upside down by cutting away the top portion of the cone shape in a plane parallel to the bottom surface. The main body 12 will be described in more detail. The main body 12 includes an inverted truncated conical main portion 12a, and a cylindrical portion 12b disposed below the main portion 12a and having a diameter approximately equal to the diameter of the lower surface of the main portion 12a. Have The main portion 12a and the cylindrical portion 12b are integrally formed, and the outer surface 12c at the boundary between the main portion 12a and the cylindrical portion 12b is rounded so as to smoothly transition from the main portion 12a to the cylindrical portion 12b. It is shaped to take on. In order to improve the strength of the main portion 12a, a reinforcing material such as FRP or metal may be embedded in the main portion 12a.

  Preferably, the body 12 is made of concrete, mortar or cement. Here, “concrete” means at least cement, coarse aggregate, fine aggregate and water mixed material, “mortar” means at least cement, fine aggregate and water mixed material, and “cement”. , Refers to a material that is a mixture of at least cement and water. The main body 12 is formed of concrete, mortar, or cement in order to improve adhesion with a floor slab waterproofing layer, which will be described later, and to reduce material costs.

  Preferably, a chamfered portion 12 a 1 is provided on the upper edge of the main portion 12 a of the main body 12. Providing the chamfered portion 12a1 avoids the possibility that the upper edge of the main portion 12a is chipped or damaged.

  A through hole 12d is provided in the center of the main body 12 (therefore, the main portion 12a and the cylindrical portion 12b).

  On the outer surface of the main portion 12a of the main body 12, a plurality of spacers 12e (three are shown in the present embodiment, but not limited thereto) are attached at a predetermined interval. In addition, although the spacer 12e is illustrated as having a cubic shape, a spacer having an appropriate shape other than this may be used. Preferably, the spacer 12e is formed of an elastic material such as rubber.

  The floor slab drainage pipe 10 also includes a drainage pipe 14 disposed below the main body 12. The drain pipe 14 is formed of a cylindrical stainless steel pipe having an inner diameter slightly larger than the outer diameter of the cylindrical portion 12b of the main body 12. The upper end 14a of the drain pipe 14 is formed in a rounded taper shape so as to match the outer surface 12c when fitted to the cylindrical portion 12b of the main body 12. A bottom plate 14b with a central opening 14b1 is fixed to the lower end of the drain pipe 14 by welding or the like, and a female threaded nipple 14b2 is fixed to the central opening 14b1 by welding or the like. The bottom plate 14b1 and the nipple 14b2 are made of stainless steel.

  A water guide flexible pipe 16 is connected to the nipple 14 b 2 of the drain pipe 14. The water guide flexible tube 16 itself is a known one.

  The floor slab drain pipe 10 further includes a plate 18 that covers the upper end of the through hole 12d of the main body 12. The plate 18 is provided with a plurality of drain holes 18a. The plate 18 is preferably made of stainless steel in consideration of corrosion resistance.

  Preferably, a concave portion 12a2 (see FIG. 3) for disposing the plate 18 is provided on the upper surface of the main portion 12a of the main body 12, and the outer diameter and depth of the concave portion 12a2 are the same as the outer diameter of the plate 18 and the depth. It is shaped to be almost the same as the thickness. The plate 18 may be firmly fixed to the recess 12a2 with an adhesive, or may only be fitted into the recess 12a2. The plate 18 may not be disposed by inserting a water conduit into the through hole 12d.

  FIG. 3 is a cross-sectional view showing a state in which the main body 12, the drain pipe 14 and the plate 18 are combined.

  Next, a method of constructing a bridge surface drainage system using the floor slab drainage pipe 10 configured as described above will be described. FIG. 4 is a schematic view showing the entire bridge surface drainage system, and FIG. 5 is an enlarged view of a portion 5 of FIG. The bridge surface drainage system shown in FIG. 4 includes a floor slab drain pipe 10 installed so as to penetrate the bridge in a substantially vertical direction at a location adjacent to the bridge cover, and a lower end of the floor slab drain pipe 10. And a water guide flexible pipe 16 fixed to the housing with a fixture.

  FIG. 6 is a series of diagrams illustrating a procedure for installing the floor slab drain pipe 10. First, a hole having a diameter slightly larger than the outer diameter of the floor slab drain pipe 10 is drilled in a place where the floor slab drain pipe 10 is to be installed (see FIG. 6A). A counterbore hole is drilled at the upper end (see FIG. 6B). Next, when the floor slab drain pipe 10 is inserted into the hole, a seal tape is applied to a position located at the lower end of the hole, and the floor slab drain pipe 10 is inserted into the hole (FIG. 6C). reference). The inserted floor slab drain pipe 10 is supported by a counterbore through a spacer 12e. The reason why the seal tape is affixed to the floor slab drain pipe 10 is to prevent the adhesive injected into the gap from flowing down. As the sealing tape, usually, a foamed material with one surface (the surface contacting the floor slab drainage pipe 10) being subjected to adhesive processing is used. Next, a liquid adhesive is filled in the gap between the hole and the floor slab drain pipe 10 (see FIG. 6D). Care should be taken not to overfill the liquid adhesive. Next, the countersink plate 18 is installed at the upper end of the floor slab drain pipe 10, and the water guide flexible pipe 16 and the like are attached to the lower end of the floor slab drain pipe 10 (see FIG. 6 (e)). Finally, a floor slab waterproof layer is installed (see FIG. 6 (f)). Note that the order of the steps shown in FIG. 6E and the steps shown in FIG. 6F may be reversed.

  FIG. 6G is an enlarged view of the portion 6g in FIG. 6F, and FIG. 6H is a plan view taken along line 6h-6h in FIG. 6G. Although the floor slab waterproof layer may be provided up to the upper surface of the main body 12 as shown in FIG. 6 (h), the main body 12 is formed of concrete, mortar, or cement even in such a case. In this case, good adhesion between the floor slab waterproof layer and the main body 12 can be ensured, so that the fear of peeling of the floor slab waterproof layer is reduced. A construction method in which the floor slab waterproof layer is not provided up to the upper surface of the main body 12 can also be adopted.

  In addition, in order to examine the strength when the main body 12 is formed of concrete, mortar, or cement, the present inventor repeatedly performed a loading test under a predetermined condition, but the main body was damaged even when loaded one million times. It was not observed, and it was confirmed that there was no problem with the assumed wheel load. Therefore, even when the main body 12 is formed of concrete, mortar, or cement, it has been confirmed that there is no problem in strength.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, the shape and size of the details of the main body 12 shown in the figure are merely illustrative, and shapes and dimensions other than those shown in the figure may be adopted.

DESCRIPTION OF SYMBOLS 10 Floor slab drain pipe 12 Main body 12a Main part 12a1 Chamfered part 12a2 Concave part 12b Cylindrical part 12c Outer surface of boundary part of main part and cylindrical part 12d Through hole 12e Spacer 14 Drain pipe 14a Upper end 14b Bottom plate 14b1 Central opening 14b2 Nipple 16 Flexible pipe 18 Eye plate 18a Drain hole

Claims (5)

A main body having an inverted frustoconical main portion and a cylindrical portion disposed below the main portion and having a diameter substantially the same as the diameter of the lower surface of the main portion;
A drainage pipe disposed below the main body,
A through hole is provided in the center of the main body,
A floor drainage pipe, wherein a plurality of spacers are attached to an outer surface of the main part of the main body at a predetermined interval. The drain pipe is formed of a cylindrical stainless steel pipe having an inner diameter slightly larger than the outer diameter of the cylindrical portion of the main body;
The outer surface of the boundary portion between the main portion and the cylindrical portion is formed in a rounded taper shape, and the upper end of the drain pipe is fitted on the outer surface when fitted to the cylindrical portion of the main body. 2. The floor slab drain pipe according to claim 1, wherein the floor slab drain pipe is formed in a rounded taper shape so as to match.   The slab drainage pipe according to claim 1 or 2, wherein the main body is made of concrete, mortar, or cement.   The slab drainage pipe according to any one of claims 1 to 3, further comprising a plate with a drain hole for covering the upper end of the through hole of the main body. A method for constructing a bridge surface drainage system using the floor slab drainage pipe according to any one of claims 1 to 4,
Drilling a hole having a diameter slightly larger than the outer diameter of the floor slab drainage pipe at the location of the concrete frame where the floor slab drainage pipe is to be installed, and a counterbore hole at the upper end of the hole And when a floor tape drain pipe is inserted into the hole, a seal tape is applied to a position located at a lower end of the hole, and then the floor drain pipe is inserted into the hole. And filling the gap between the hole and the floor drainage pipe with a liquid adhesive.

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