JPH0342364B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of repairing a railing and/or ground covering that is fixedly installed on a highway or elevated railway section.

(Prior art and its problems) Parapets made of concrete or the like are fixed to bridges such as expressways and elevated railway sections along the side edges of the road in order to ensure safety on the road surface and on the underpass. These handrails are of the type that is fixed directly to the roadbed,
There are types that are planted and fixed to the ground cover, but in recent years there have been many accidents where the concrete of these handrails and ground cover has peeled off and fallen onto the road below.

The causes of this are deterioration of the concrete surface due to wind damage, freezing damage, salt damage, and air pollution over time, as well as corrosion and expansion of the reinforcing bars due to the use of sea sand in the concrete, which leads to cracks in the concrete. This is to peel off the thin concrete cover.

In order to prevent this, the surface is protected by applying paint to the entire underside of the railing, subgrade, and the subgrade that is connected to it, or by forming a reinforcing waterproof layer such as a combination of resin and glass cloth. This is done to prevent peeling of steel, water intrusion, and corrosion of reinforcing bars.

However, if the entire railing, ground covering, and underside of the subgrade are covered with the above-mentioned resin layer, the escape route for water that has seeped into the subgrade from the road surface will be blocked, and this will accumulate in the subgrade layer and be destroyed. This causes problems such as accelerated corrosion of the reinforcing bars of the roadbed and water leakage from unexpected locations.

(Technical Problem) The object of the present invention is to enable smooth removal of water that has seeped into the subgrade when forming a reinforcing waterproof layer on the outer wall of the handrail or subgrade and on the lower surface of the subgrade. .

(Technical means and their effects) In order to solve this technical problem, in the present invention,
After fixing the gutter-like body along the longitudinal direction to the lower surface of the side of the roadbed on which the handrail or ground covering is fixed, at least the outer wall of the handrail or ground covering, and the outside of the roadbed and gutter-like body that are continuous with this. Cover and fix the reinforcing waterproof layer to the inside of the waterproof layer to ensure a spot for water to seep out along the side of the roadbed, and form drainage holes at appropriate intervals in the gutter-like body and the reinforced waterproof layer to form the gutter. This is a technical means to allow the water that has flowed into the body to naturally drain away.

(Effects of the present invention) According to this technical means, it is possible to protect fragile handrails, ground coverings, and roadbed surfaces, and prevent concrete from peeling and falling, without performing complicated work. Water that has seeped into the floor can be naturally removed through the gutter-like body, helping to improve the health of the concrete.

In addition, since the gutter-like body forms a downward convex part on the reinforcing waterproof layer itself along the side of the subgrade, water that has descended from the outside of the handrails and ground covering can be absorbed by the girder of the subgrade. It also serves as a drain to prevent water from moving to the side, and is convenient for protecting the columns that support the girder.

Note that the gutter-like body is supported from below by a reinforcing waterproof layer, so there is no fear that this will come off and fall.

(Embodiment) The formation of the drainage hole in the above technical means is as follows:
The holes may be made using a drill etc. after the reinforcing waterproof layer is fixed, or the holes may be formed in the gutter-like body in advance and the holes may not be blocked when covering with the reinforcing waterproof layer. good.

(Example) The drawing is a schematic enlarged view of the main part of the longitudinal section of the expressway, and shows the state of repair of the road girder 1 in which the handrail 3 is directly fixed along the side edge of the road bed 2. .

On the lower surface of the side of the roadbed 2, a plastic gutter 4 with a substantially V-shaped cross section is directly bonded to the lower surface of the roadbed 2 with an adhesive 5, with its upper end horizontally bent outward and used as a fixed piece. . The adhesive 5 is applied in dots on the fixed piece so that water can enter the gutter 4 from between the fixed piece and the subgrade 2. Further, since the gutter 4 is supported by the reinforcing waterproof layer, it is not necessarily necessary to securely fix the gutter 4, and it may be temporarily fixed.

An epoxy resin layer 6 is coated and fixed on both the inner and outer walls of the balustrade 3, and a glass cloth 7 is embedded within this resin layer 6, forming a strong reinforcing waterproof layer. The reinforcing waterproof layers 6 and 7 continue from the outer wall of the railing 3 and cover the lower surface of the subgrade 2 and the outer side of the gutter 4.

Vertical drainage holes 8 are bored in the gutter 4 and the reinforced waterproof layers 6 and 7 at appropriate intervals, and serve as drainage ports for the gutter 4.

In this embodiment, the water is allowed to fall directly from the drain hole to the lower passageway, but a pipe may be connected to the drain hole to guide the water to the drainage pipe of the side gutter.

In the above embodiments, epoxy resin and glass cloth were used as the reinforcing waterproof layer, but it goes without saying that other known resins and reinforcing materials may be used.

Further, the shape and material of the gutter are not limited to those described in the above embodiments, but can be appropriately selected by those skilled in the art.

[Brief explanation of drawings]

The drawing shows an example of a road repaired by the method of the present invention, and is a schematic longitudinal sectional view of a road with its main parts enlarged. 2: Roadbed, 3: Railing, 4: Gutter.

Claims (1)

[Scope of Claims] 1. After fixing a gutter-like body along the longitudinal direction to the lower surface of the roadbed side part on which the handrail and ground covering are fixed, A method for repairing balustrades and ground coverings, characterized by coating and fixing a reinforcing waterproof layer on the lower surface of the subgrade and the outside of the gutter-like body, and forming drainage holes at appropriate intervals in the gutter-like body and the reinforcing waterproof layer. 2. The repair method according to claim 1, wherein the reinforcing waterproof layer is coated and fixed on the outside of a drainage hole previously formed in the gutter-like body so as not to block it. 3. The repair method according to claim 1, wherein the drain hole is formed by covering and fixing a reinforcing waterproof layer on the outside of the gutter-like body and then drilling from the outside.