KR19990038303A - Drainage system for bridge slab and construction method - Google Patents

Abstract

The present invention relates to a drainage device for a bridge slab for discharging water penetrating into the asphalt surface of a bridge to the outside of the bridge and a construction method thereof.

The present invention is a water collecting means for collecting rainwater permeated on the slab through the pores formed in the asphalt layer, and a drain pipe which is installed at an angle (θ) inclined to the slab so as to drain the water collected in the water collecting means to the outside. It is characterized by being configured.

Description

Drainage system for bridge slab and construction method

The present invention relates to a drainage device for a bridge slab for discharging water penetrating into the asphalt surface of a bridge to the outside of the bridge and a construction method thereof.

In general, the asphalt pavement layer on the bridge slab is known as an impermeable layer, but the asphalt pavement layer is a mixture of asphalt material and calm gravel, there are many voids between the gravel, through the pores to the asphalt layer Some of the fallen rainwater penetrates and collects into the upper side of the slab due to the lateral gradient defined for road drainage (the slope of the road surface formed from the center of the bridge to the edge).

The water soaked is gradually accumulated and accumulated on the waterproof packaging layer of the slab top plate because it is not discharged to the outside of the slab top plate because of the waterproof packaging layer of the slab top plate.

As such, the water accumulated on the waterproof paving layer of the slab top plate is frozen as the temperature decreases in winter, and as this phenomenon is repeated, the asphalt paving layer is lifted from the slab top plate to destroy the asphalt pavement layer. there was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to collect water that has soaked into the asphalt layer of a bridge slab, and a drainage device for bridge slab which can be easily discharged from the slab top plate of the bridge to the outside and its construction. To provide a method.

Another object of the present invention is to provide a drainage device for a bridge slab that can prevent breakage of an asphalt layer in contact with a barrier and a construction method thereof.

In order to achieve the above object, a drainage device of a bridge slab according to an embodiment of the present invention includes water collecting means for collecting rainwater permeated on the slab through pores formed in an asphalt layer, and water collected in the water collecting means. Characterized in that the drain pipe is installed inclined at a predetermined angle (θ) to the slab to drain to the outside.

In addition, according to an embodiment of the present invention, a method for constructing a drainage device for a bridge slab is such that when the slab is cast with cement, the drain pipe is inclined at an angle θ toward the lower portion of the slab from near the inner side of the barrier wall and the slab. A drain pipe embedding process for embedding at regular intervals, and an uneven surface forming process for cutting and forming the uneven surface along both edges of the water collecting means so that water permeated into the first and the first asphalt layers can be easily collected; A water collecting means installation step of inverting the water collecting means and placing it on a drain pipe installed on the slab of the bridge; and applying the first and second asphalt layers on the slab and the water collecting means to apply the water collecting means on the slab. Characterized in that it consists of a water collecting means for fixing the fixing means.

1 is a partial longitudinal cross-sectional view schematically showing the drainage of the bridge slab according to an embodiment of the present invention,

FIG. 2 is an enlarged cross-sectional view of part A of FIG. 1;

3A is a perspective view schematically showing an L-shaped section steel which is applied to an embodiment of the present invention to collect water;

3b is a perspective view schematically showing another L-shaped section steel which is applied to an embodiment of the present invention to collect water;

3c is a perspective view schematically showing another L-shaped section steel which is applied to an embodiment of the present invention to collect water;

4 is a flowchart illustrating a process of installing a drainage device of a bridge slab according to an embodiment of the present invention in a slab of a bridge.

<Description of Symbols for Main Parts of Drawings>

1: Mold 3: Slab

5: firewall 7: drain pipe

9, 19, 29: water collecting means 11: first asphalt layer

12: second asphalt layer 15: notch

Hereinafter, a drainage device for a bridge slab according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partial longitudinal cross-sectional view schematically showing the drainage of the bridge slab according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view showing a portion A of Figure 1, Figure 3a is an embodiment of the present invention Fig. 3B is a perspective view schematically showing an L-shaped section steel applied to an example to collect water, and FIG. 3B is a perspective view schematically showing another L-shaped section steel applied to an embodiment of the present invention to collect water. 3c is a perspective view schematically showing another L-shaped section steel which is applied to an embodiment of the present invention to collect water.

1 to 3, reference numeral 1 denotes a mold, and a slab 3 is provided on the mold 1a.

In addition, at both sides of the width direction of the slab 3, a barrier wall 5 is poured by concrete along the longitudinal direction of the road, perpendicular to the slab 3, and the inner side of the barrier wall 5 and the slab ( A drain pipe 7 made of PVC, a synthetic resin, a metal material or an artificial rubber is embedded at an inclined angle (θ) from the vicinity where 3) meets toward the lower part of the slab 3.

In the above description, it is preferable that the drain pipe 7 is buried at an angle θ of 0 ° to 90 ° with respect to the vertical line l perpendicular to the asphalt layer, and the length of the bridge at intervals of 1 m to 5 m. It is installed along the direction.

On the drain pipe 7 embedded in the slab 3, water collecting means 9 provided with an inverted L-shape steel so as to easily collect water penetrating the asphalt layer described later is provided.

The drainage device of the bridge slab according to an embodiment of the present invention to easily collect water that is embedded in the asphalt layer and permeates the upper surface of the slab 3 through the pores of the asphalt layer and to improve workability. In the water collecting means (9, 19, 29) it is preferable to use the L-shaped steel, the edge of the L-shaped steel may use the shape as shown in Fig. 3a, but infiltrated the asphalt layer In order to easily collect the water, it is preferable to form both edges of the uneven surfaces 19a and 29a along the longitudinal direction of the shaped steel as shown in 3b or 3c.

In the above description, the water collecting means 9 is coated on the surface thereof with a corrosion inhibitor such as light shortlist and anti-corrosion paint.

In the present invention, the water collecting means 9 has been described using an L-shaped section steel as an example, but the present invention is not limited to this, for example, C-shaped steel, C-shaped synthetic resin tube, It goes without saying that a U-shaped reinforcement beam, a semicircular shaped pipe, or a semicircular synthetic resin pipe may be used.

Next, after the water collecting means 9 is provided at one end of the drain pipe 7 provided on the slab portion 3 as described above, the first asphalt layer 11 and the second asphalt layer 13 are disposed. Is applied in a conventional manner, the water collecting means 9 is fixedly installed between the slab 3 and the first asphalt layer 11.

In Fig. 1, reference numeral 15 denotes a notch for preventing rainwater flowing along the outer surface of the barrier wall 5 from flowing along the lower bottom surface of the slab 3.

Next, a construction method of the drainage device of the bridge slab according to the embodiment of the present invention configured as described above will be described with reference to FIG.

4 is a flowchart illustrating a process of installing a drainage device of a bridge slab according to an embodiment of the present invention in a slab of a bridge. In FIG. 4, S represents a step.

First, in manufacturing the slab 3 of the bridge in step S1, the drain pipe 7 is inclined at a predetermined angle θ toward the lower portion of the slab 3 from the vicinity of the inner side of the barrier wall 5 and the slab 3 meeting each other. L is used at a predetermined interval (1 m to 5 m), and is used as the water collecting means 9 to easily collect the water seeped into the first and the asphalt layers 11 and 13 by going to step S2. It cuts and forms the uneven surface along both edges of the shaped steel.

Next, the process proceeds to step S3, the water collecting means 9 is turned over and placed on the drain pipe 7 provided on the slab 3 of the bridge, and then the process proceeds to step S4 and the slab 3 and the water collecting means ( The first asphalt layer 11 is coated on the 9) in a conventional manner to fix the water collecting means 9.

Subsequently, the process proceeds to step S5 to apply the second asphalt layer 13.

The drainage device of the bridge slab of the present invention installed in the slab 3 by such a construction method is excellent in seeping through the pores formed in the first and second asphalt layers (11, 13) on the slab (3) It is easily collected into the water collecting means 9 provided near the barrier wall 5 and the slab 3 by a waterproof layer (not shown) applied to it.

Since the rainwater collected in the space formed by the water collecting means 9 is discharged to the outside through the drainage pipe 7, the rainwater is collected and accumulated between the slab 3 and the protective wall 5 during the winter. There is no fear of freezing in winter.

Therefore, the water that has soaked into the asphalt layer of the bridge slab can be collected into the water collecting means 9 and easily discharged from the slab 3 top of the bridge to the outside through the drain pipe 7. It is possible to prevent breakage of the part of the asphalt layer that is in contact.

As described above, according to the drainage device of the bridge slab according to an embodiment of the present invention, water collecting means for collecting rainwater permeated on the slab through pores formed in the asphalt layer, and water collected in the water collecting means. Since it consists of a drain pipe installed inclined at a certain angle (θ) on the slab to drain to the outside, the water that has soaked into the asphalt layer of the bridge slab is collected by water collecting means and easily discharged from the slab top plate of the bridge through the drain pipe. Therefore, the rainwater that has permeated into the asphalt layer during winter can be discharged to the outside to prevent the freezing of rainwater on the asphalt layer which is in contact with the protective wall, thereby preventing the damage of the asphalt layer. .

Claims (5)

Water collecting means for collecting rainwater permeated on the slab through the pores formed in the asphalt layer, and the drain pipe is inclined at a predetermined angle (θ) to the slab to drain the water collected in the water collecting means to the outside Drainage of bridge slab The method of claim 1, wherein the water collecting means is a bridge slab, characterized in that selected from among the c-shaped steel, c-shaped synthetic resin tube, c-shaped reinforcement beam, semi-circular shaped tube, or semi-circular synthetic resin tube Drainage. The drainage system of bridge slab according to claim 1, wherein the water collecting means is coated with a corrosion preventing material on a surface thereof. The bridge according to claim 1, wherein the drain pipe (7) is embedded at regular intervals in the slab at an angle (θ) of 0 ° to 90 ° with respect to the vertical line (1) perpendicular to the asphalt layer. Drainage of the slab. The process of embedding the drain pipe at regular intervals along the longitudinal direction of the bridge at an angle inclined toward the lower portion of the slab from the inner side of the barrier wall and near the slab at the time of fabrication of the slab; The uneven surface forming process of cutting the uneven surface along the both edges of the water collecting means so as to easily collect the water permeated into the asphalt layer, and on the drain pipe installed on the slab of the bridge by inverting the water collecting means. Bridge slab comprising the step of installing the water collecting means to be mounted and the water collecting means fixing step of fixing the water collecting means on the slab by applying the first and second asphalt layers on the slab and the water collecting means. Drainage construction method.