JP2013185361A - Drain ditch forming member of overpass expressway and construction method of overpass expressway using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain ditch forming member of an overpass expressway, capable of eliminating the need of opening a lid comprising a metal member with human power when performing cleaning, lowering a cleaning cost by keeping safety of a cleaning person, preventing durability from being damaged by not corroding a metal member inside a bridge pier, and smoothly draining drain water accumulated on a road surface of the expressway, and a construction method of the overpass expressway using the drain ditch forming member.SOLUTION: A drain ditch forming member is provided with a drain channel space in the inside, is formed forming a roughly rectangular parallelepiped cylinder shape by a bottom wall, both sidewalls rising from a width direction of the bottom wall and an upper wall connecting distal ends of both sidewalls, and has a plurality of first reinforcing bars penetrated inside the bottom wall in the width direction, projected to the outer side respectively on the distal end side, and disposed at an interval in a bottom wall longitudinal direction, and the upper wall is provided with an oblong hole for drain water, which is penetrated in a vertical direction and communicated with the drain channel space.

Description

The present invention relates to a drainage groove forming member of a viaduct expressway and a construction method of a viaduct expressway using the drainage groove forming member.

Conventionally, various methods have been proposed and implemented for the formation of drainage grooves on viaduct expressways.
For example, as shown in FIGS. 10 and 11, a plate-like metal member is molded and attached to the drainage groove 20 at both ends in the road surface width direction of the viaduct expressway 1, and the groove 20 formed by the metal member is attached to the metal. A drainage groove laying method configured so as to be covered with a covering member 21 formed of a member is generally known (see JP-A-2005-344389).
JP-A-7-279112 discloses that it is difficult to form drainage grooves at both ends in the road surface width direction of the viaduct expressway 1, and drainage absorbing members at both ends in the road surface width direction of the viaduct expressway 1. Proposals have been made to install.

JP 2005-344389 A Japanese Laid-Open Patent Publication No. 7-279112

  However, as in the prior art, a plate-shaped metal member is molded and attached to the drainage groove 20 at both ends in the road surface width direction of the viaduct expressway 1, and the groove 20 formed of the metal member is formed of the metal member. In the drainage laying method constructed so as to be covered with the covering member 21, it is necessary to open the covering member 21, which is formed of the metal member by manpower, that is, the lid when cleaning, and a vehicle that passes at that time. Therefore, there is a problem that the cleaning cost will increase due to the need to take measures to consider them.

  Further, in the drainage laying method according to the above-described configuration, the covering member 21, that is, the lid is formed of a metal member when used, so that a vehicle passing especially in the rain slips or a metal member is used. There was a problem that it deteriorated early due to rust.

  Furthermore, due to long-term use, drainage penetrates from the seam between the metal member with drainage grooves and the concrete member with floorboard, and the penetrated drainage is reinforced in the floor slab and eventually into the pier. It has been pointed out that the metal member is corroded and the durability is impaired.

  Moreover, the installation of the drainage absorbing member is not a fundamental solution for the wastewater treatment accumulated on the road surface of the highway, and there is a problem that it is only a temporary method.

Thus, the present invention was devised to cope with the above-mentioned conventional problems, and it is not necessary to manually open the lid made of the metal member at the time of cleaning, and the safety of the cleaner can be maintained. The cleaning cost can be reduced, and the vehicle that passes during operation does not slip, and the durability can be secured, and even after many years of use, the drainage does not penetrate inside the highway for the viaduct. This means that the steel bars installed in the floorboard and the metal members in the piers will not be corroded, so durability will not be impaired and drainage accumulated on the road surface of the expressway can be drained smoothly. An object of the present invention is to provide a drainage groove forming member for a road and a method for constructing a viaduct expressway using the drainage groove forming member.

The present invention
A drainage channel space is provided inside, and is formed in a substantially rectangular parallelepiped cylindrical shape by a bottom wall, both side walls rising from the bottom wall width direction, and an upper wall connecting the end portions of both side walls,
A plurality of first rebars penetrating in the width direction in the bottom wall, the front ends projecting outward from each other, and arranged at intervals in the longitudinal direction of the bottom wall;
The upper wall is provided with a drainage long hole penetrating vertically and communicating with the drainage space.
It is characterized by
Or
The drainage long hole is formed as a linear long hole that is brought closer to one side end side in the width direction of the upper wall and goes in the longitudinal direction.
It is characterized by
Or
In the side wall, a drainage introduction hole penetrating from the outer side surface of the side wall toward the drainage channel space with a downward slope is formed.
It is characterized by
Or
This is a method for constructing a viaduct for the viaduct, where a plurality of second reinforcing bars are arranged in the formwork for the highway floorboard and a plurality of third reinforcing bars are arranged in the formwork for the highway side wall. ,
Next, the pre-manufactured highway drainage groove forming member was placed on the width direction end side in the expressway floor board formwork, and was placed in the expressway floorboard formwork. A second rebar is connected to the second rebar of the drainage groove forming member, and a third rebar arranged in the formwork for the expressway side wall is connected to the second rebar of the drainage groove forming member. ,
Placing concrete in the formwork for the highway floorboard and in the formwork for the highway side wall;
It is characterized by this.

According to the present invention, it is not necessary to manually open the lid made of a metal member at the time of cleaning, the safety of the cleaner is ensured, and thereby the cleaning cost can be reduced, and the vehicle that passes during the operation slips. In addition, the durability has also improved, and even after many years of use, the drainage does not penetrate inside the viaduct expressway, so the reinforcing bars arranged in the floorboard and eventually Since the metal member in the pier is not corroded, the durability is not impaired, and the drainage collected on the road surface of the expressway can be drained smoothly.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings.

FIG. 1 shows a structure of a drainage groove forming member 10 of a viaduct expressway according to the present invention.
The drainage groove forming member 10 has a bottom wall 2 having a substantially rectangular plate shape, and penetrates through the bottom wall 2 in the width direction. The front end side protrudes outward, and faces the longitudinal direction of the bottom wall 2. A plurality of first rebars 3 arranged at intervals, side walls 8, 8 rising from both sides of the bottom wall 2 in the width direction, and an upper wall 4 connecting the side walls 8, 8 tips. It has a substantially rectangular parallelepiped cylindrical shape. That is, the drainage space 7 is provided inside.

And the said upper wall 4 penetrates to an up-down direction, a linear clearance gap is drilled, and this clearance gap is formed as the long hole 6 for drainage.
A drainage channel space 7, which is a space communicating with the drainage long hole 6, is located below the drainage long hole 6.

Further, as shown in FIG. 6, the side wall 8 that is laid on the road surface side of the viaduct expressway 1 penetrates from the outer surface of the side wall 8 toward the drainage space 7 with a downward slope. A drainage introduction hole 11 is formed.
Rainwater that has fallen on the road surface of the viaduct expressway 1 is configured to permeate into the floor surface formed of permeable asphalt or the like and gather on the end side in the width direction of the floor surface. The drainage introduction hole 11 is provided to allow the collected rainwater to flow into the drainage channel space 7 of the drainage groove forming member 10.

  Here, with reference to FIG. 3, FIG. 4, FIG. 5, the manufacture of the drain groove forming member 10 will be described.

  As described above, the drain groove forming member 10 is manufactured in large quantities in advance in a factory or the like. And it is conveyed to the construction site of the viaduct expressway 1, and this drainage ditch formation member 10 is attached on the site, and the viaduct expressway 1 is constructed.

In FIG. 3, reference numeral 12 denotes a bottom mold. A pair of side molds 13 and 13 are erected on both sides of the bottom mold 12 with a predetermined interval.
Further, reference numeral 14 denotes an inner mold frame. By disposing the inner mold frame 14, the drainage channel space 7 and the like can be formed.

  Further, as is understood from FIG. 3, the first reinforcing bars 4... Horizontally penetrate both side molds 13 and 13, the central part is disposed in the mold, and both end parts thereof are outward. Protrusively arranged.

  Here, after assembling the formwork as shown in FIG. 3, concrete 15 is placed. After a predetermined curing time, first, the both-side molds 13, 13 are removed from the mold. At this time, since the plurality of first reinforcing bars 4 are disposed so as to penetrate the both-side molds 13 and 13, the both-side molds 13 and 13 move in the horizontal direction and are removed from the mold (FIG. 4).

  Next, the drain groove forming member 10 is turned upside down on the bottom mold 12, and finally the inner mold 14 is pulled out in a horizontal direction and demolded (see FIG. 5) to manufacture the drain groove forming member 10. Complete.

  The plurality of drainage groove forming members 10... Manufactured as described above are transported to the construction site of the viaduct expressway 1, and as understood from FIG. As it is installed, the first reinforcing bars 3 are connected to the second reinforcing bars 16 and the third reinforcing bars 17. Here, the connection method is not limited at all. It may be connected by welding, or it may be connected by a tie wire, or it may be connected by joining both rebars, covering with a coupler-like member, injecting grout inside, and connecting with a female screw. It is also possible to use a connecting rod and connect both reinforcing bars via the connecting rod.

  From this state, concrete is placed and the viaduct expressway 1 is formed.

  By the way, FIG. 7, FIG. 8, FIG. 9 shows the configuration of the drainage groove forming member 10 according to another embodiment. As shown in FIGS. 7 and 8, the upper wall is integrated to form an integrated upper wall 19, and rectangular drain holes 20, 20 are formed in the center of the integrated upper wall in the width direction as shown in FIG. It does not matter if you do it.

Further, as shown in FIG. 8, the first reinforcing bar 3 penetrating the bottom wall of the drain hole forming member 10 in the width direction is slightly bent inside, and the bottom width direction center of the drain path 7 communicating with the drain hole 20 is recessed. It can be formed, so that the flow of water flowing through the drainage channel 7 can be made faster.

It is the structure explanatory view (the 1) explaining the composition of the drain ditch formation member by the present invention. It is the structure explanatory view (the 1) explaining the laying state of the drain ditch formation member by the present invention. It is explanatory drawing (the 1) explaining the manufacturing process of the drain ditch formation member by this invention. It is explanatory drawing (the 2) explaining the manufacturing process of the drain groove forming member by this invention. It is explanatory drawing (the 3) explaining the manufacturing process of the drain ditch formation member by this invention. It is composition explanatory drawing explaining the laying state of the drain ditch formation member by other examples. It is the structure explanatory view (the 1) explaining the composition of the drainage ditch formation member by other examples. It is the structure explanatory view (the 2) explaining the composition of the drain ditch formation member by other examples. It is structure explanatory drawing (the 3) explaining the structure of the drain-ditch formation member by another Example. It is the structure explanatory drawing (the 1) explaining the structure of a prior art example. It is the structure explanatory drawing (the 1) explaining the structure of a prior art example.

DESCRIPTION OF SYMBOLS 1 Viaduct expressway 2 Bottom wall 3 1st reinforcing bar 4 1st upper wall part 5 2nd upper wall part 6 Drainage long hole 7 Drainage channel space 8 First side wall 9 Second side wall 10 Drainage groove formation member 11 Drainage introduction hole 12 Bottom formwork 13 Side formwork 14 Inner formwork 15 Concrete 16 Second rebar 17 Third rebar
19 Integrated upper wall 20 Drain hole

Claims (4)

A drainage channel space is provided inside, and is formed in a substantially rectangular parallelepiped cylindrical shape by a bottom wall, both side walls rising from the bottom wall width direction, and an upper wall connecting the end portions of both side walls,
A plurality of first rebars penetrating in the width direction in the bottom wall, the front ends projecting outward from each other, and arranged at intervals in the longitudinal direction of the bottom wall;
The upper wall is provided with a drainage long hole penetrating vertically and communicating with the drainage space.
A drainage ditch forming member of a viaduct expressway characterized by the above.
The drainage long hole is formed as a linear long hole that is brought closer to one side end side in the width direction of the upper wall and goes in the longitudinal direction.
The drainage groove forming member of a viaduct expressway according to claim 1.
In the side wall, a drainage introduction hole penetrating from the outer side surface of the side wall toward the drainage channel space with a downward slope is formed.
The side groove forming member of the viaduct expressway according to claim 1 or 2.
This is a method for constructing a viaduct for the viaduct, where a plurality of second reinforcing bars are arranged in the formwork for the highway floorboard and a plurality of third reinforcing bars are arranged in the formwork for the highway side wall. ,
Next, the gutter forming member for the viaduct expressway according to any one of claims 1 to 3 which is manufactured in advance is disposed on the width direction end side in the formwork for the expressway floor board, The second rebar arranged in the form for the expressway floor plate and the second rebar of the side groove forming member are connected, and the third rebar arranged in the form for the highway side wall and the Connecting the second rebar of the side groove forming member,
Placing concrete in the formwork for the highway floorboard and in the formwork for the highway side wall;
A construction method of a highway for a viaduct characterized by the above.

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