KR20040092222A - Waterproofing system on a bridge deck - Google Patents

Abstract

PURPOSE: A waterproof layer structure for a deck of a bridge or an elevated road is provided to prevent crack of a waterproof layer in applying load momentarily while paving the road or suddenly stopping or accelerating the large vehicle by embedding the reinforcing member in the middle of the waterproof layer. CONSTITUTION: A primer spread layer(22) is formed on an upper plate(10) before forming a road pavement layer(40) on the upper plate of a bridge or an elevated road, and a waterproof layer(20) is formed in the upper part of the primer spread layer to restrict infiltration of water. A mesh type reinforcing member(30) is installed in the middle of the waterproof layer between the primer spread layer and the road pavement layer, and woven by synthetic resin fiber. Plural waterproof layers are formed to insert the mesh type reinforcing member.

Description

Waterproofing system on a bridge deck

The present invention relates to a waterproof layer structure of a bridge and an elevated road bridge, and more particularly, to a waterproof layer structure of a bridge and an elevated road bridge to prevent cracking of a waterproof layer which is performed to prevent corrosion of reinforcing steel bars reinforcing a bridge and an upper plate of an elevated road. It is about.

In general, in order to build a bridge or overpass, the bridges are constructed at predetermined distances in consideration of the terrain and the surrounding environment, and the neighboring bridges are connected with steel structures and reinforced concrete structures, and paved with asphalt or cement on them. By doing this, roads that allow traffic to pass are completed. In particular, the upper plate is completed by installing a P.C beam made in advance in a steel mill, etc., between the piers and the piers, and placing the reinforcing bars at predetermined intervals according to the design in the upper space of the P.C beam and then placing concrete.

And before the top plate is completed as described above and before the pavement construction using ascon or cement, waterproof construction must be carried out to prevent corrosion of the reinforcing steel used as core material due to water penetrating into the reinforced concrete inside the intersection of the top plate must do it.

Therefore, after the concrete is laid to some extent and the concrete is cured to some extent, after the concrete has been cured to some extent, to remove the latencies and irregularities generated during the concrete placing process by using a planing machine, etc. The pretreatment work is performed to remove foreign substances such as oil or paint, which would lower the oil content.

Conventional waterproofing method used in bridges and overpass constructions. Waterproofing method that penetrates into the mother body more than 4 mm of penetration type waterproofing agent diluted silicone, Siloxane, Silane, etc. in solvent to generate waterproof effect by water repellency. Although this was used, this waterproofing technique is limited in that it is not effective in waterproofing when a hydraulic pressure of a predetermined pressure or more is applied.

In addition, as a method of applying a waterproofing agent to the upper surface of the bridge, a coating type waterproofing method and a sheet type waterproofing method are applied.

Among them, the coating-type waterproofing method is applied to the cross-section of the top plate after the pretreatment work by applying the primer first or secondly, and after the primer coating layer is dried, the gel-based waterproofing agent mainly composed of chloroprene-based synthetic rubber is used for at least two times. It is waterproofing method to carry on. On the other hand, the sheet-type waterproofing method is a waterproofing method of covering the waterproof sheet produced by coating a silica sand and polyethylene film on the upper surface after mixing the thermoplastic rubber and asphalt with a nonwoven fabric as the center substrate on the primer coating layer.

By the way, the above-described waterproof coating method has the advantage that the seamless waterproof film is formed, not only excellent adhesion to concrete and asphalt concrete, but also excellent construction on protrusions such as irregularities, etc., the application of the waterproofing material is made by the operator There is a disadvantage that the thickness of the waterproof layer is not constant. In particular, the coating layer of the waterproof layer is non-uniform, the problem occurs such that the coating layer is broken under the influence of the load of heavy equipment and work vehicles for construction in the process of laying ascon.

In addition, the sheet-type waterproofing method has an advantage that a waterproof layer having a uniform thickness is formed, and the curing agent curing period after completion of construction is short, while it is disadvantageous for the construction of protrusions such as uneven portions, and is applied to a part of the adhesive surface of the sheet. When bubbles are generated, there is a problem that the bubbles can spread to all the areas of the adhesive surface. In particular, in the process of laying ascon, the physical properties of the waterproofing agent are changed by the temperature of the asphalt concrete reaching 120-180 ° C., which causes a problem that it does not function as a waterproofing agent.

Due to the problems pointed out as the above disadvantages, after the bridge and the overpass are completed, the continuous load is transmitted due to the repeated vehicle traffic on the bridge and the overpass, and instability when the load due to the sudden start or stop of the vehicle is applied at once. One part of the waterproofing layer can break and, in extreme cases, can present a serious risk of corrosion of the reinforcing bar, which is the skeleton of the deck and piers.

Accordingly, the present invention has been made to solve the above problems, to provide a waterproof layer structure of bridges and bridges to prevent the occurrence of defects of the waterproof layer to prevent corrosion of the reinforcing bars reinforcing the top plate of bridges and elevated roads. The purpose is to.

The present invention as a means for achieving the above object,

In the structure in which the primer coating layer is formed on the upper side of the top plate before the road pavement layer is formed on the upper plate of the bridge and overpass, and a waterproof layer is formed on the primer coating layer to prevent water from penetrating.

In the middle portion of the waterproof layer formed between the primer coating layer and the road pavement layer, the mesh-shaped reinforcement woven with synthetic resin fibers is embedded, wherein the waterproof layer in which the mesh-shaped reinforcement is embedded is formed in a plurality of layers. do.

1 is a cross-sectional view of the waterproof layer formed by the present invention.

Figure 2 is a perspective view of the reinforcing material according to the present invention.

Figure 3 is a state diagram of the waterproof layer formed in the drainage portion as an embodiment of the present invention.

Figure 4 is a state diagram of the waterproof layer formed on the firewall portion as an embodiment of the present invention.

※ Explanation of code for main part of drawing

10: top plate 10a: drain

10b: firewall 20: waterproof layer

22: primer coating layer 24: primary waterproof coating layer

26: 2nd waterproof coating layer 28: 3rd waterproof coating layer

30: reinforcement 40: road pavement layer

Hereinafter, embodiments of the structure of the waterproof layer formed on the bridge and the elevated road formed by the present invention and a method of forming the same will be described in detail with the accompanying drawings.

1 is a cross-sectional view of the waterproof layer formed by the present invention, Figure 2 is a perspective view of the reinforcing material according to the present invention, Figure 3 is a state diagram of the waterproof layer formed in the drainage portion as an embodiment of the present invention, Figure 4 is an embodiment of the present invention As an example, the state diagram of the waterproof layer formed in the firewall part is shown.

Reference numeral 30 in the drawing indicates a reinforcement according to the present invention, which is a mesh woven from synthetic fiber yarns. The void shape of the reinforcing material 30 is not particularly limited, but is preferably manufactured in a rectangular shape or a rhombus shape, and the gap between the voids is not specified but is preferably formed within a range of 3 to 5 mm. And the reinforcement 30 is produced and supplied in a length that can be used to cut to the appropriate size in the construction site.

If the reinforcement 30 is an embodiment applied to the waterproof construction site of the bridge or overpass as follows.

After the construction of the bridge and overpass, the irregularities or irregularities generated during the concrete work process are removed using a tool such as a planer or shot blast before the waterproofing work on the bridge surface. The pretreatment process removes foreign substances such as oil or paint sprayed. In addition, the dent is filled with non-contraction cement, epoxy resin, or the like. The contaminants generated during this process and the dust-absorbing vacuum cleaner are removed to prepare the primer on the top of the cross.

After pouring the top plate, the concrete is sufficiently cured, and when the moisture content is dried to 10% or less, the waterproofing agent can be applied.

The primer coating layer 22 is formed on the cross section of the upper plate which has been pretreated as described above by applying a primer as described in the related art. The primer is preferably mixed with diluent within 10% in an amount of 0.3 liters per square meter.

After the predetermined time elapses after the primer coating layer 22 is formed as described above, application of the waterproofing agent becomes possible.

Application of the waterproofing agent may be made of several layers depending on the design of the bridge or overpass. In the embodiment of the present invention, the waterproofing agent is described as an example in which the application of the waterproofing agent is carried out three times. The waterproofing agent is mainly composed of chloroprene-based resin, and is uniformly coated on the primer coating layer 22 using a rubber spatula or roller three times in an amount of 0.8 kg per square meter.

In the first waterproofing construction, the waterproofing agent is evenly applied as described above on the primer coating layer 22 first. And the reinforcement 30 is cut to a suitable size and placed on the surface of the applied waterproofing agent, the primary waterproofing agent by pressing the reinforcing material 30 to the waterproofing agent using a roller or the like so that the reinforcing material 30 is not wrinkled. The coating layer 24 is formed. The bent or angled portions, such as the drain hole 10a or the connecting portion of the barrier wall 10b, apply a waterproofing agent along the surface thereof and allow the reinforcing material 30 to be positioned. In addition, the joints of the reinforcing material 30 is to be careful so that the joints to each other. After about 12 hours have passed since the formation of the primary waterproofing agent coating layer 24, the secondary waterproofing work is possible.

The secondary waterproof construction is made in the same manner as the primary waterproof construction on the upper surface of the primary waterproofing agent coating layer 24 described above. However, it is preferable that the mesh body of the reinforcing material 30 positioned in the first waterproofing process and the mesh body of the reinforcing material 30 positioned in the second waterproofing work be shifted from each other.

As described above, the third waterproofing coating layer 28 is formed on the upper surface of the second waterproofing coating surface 26 formed by the first waterproofing construction and the second waterproofing construction through the third waterproofing construction. The third waterproofing work is a finishing step of the waterproofing work, and the reinforcing material is not buried in the third waterproofing coating layer 28 made through this process.

Therefore, the waterproof layer 20 is composed of a plurality of waterproof coating layers (24, 26, 28) as described above, the reinforcing material 30 is embedded in the waterproof coating layer, the construction process such as asphalt construction The risk of breaking under load of heavy equipment and working vehicles is reduced.

The thickness of the waterproof layer 20 made as described above is preferably formed to about 1.0 ~ 1.5 mm.

And 2 to 7 days after finishing the waterproofing work as described above, it is good to proceed with the construction of the road pavement layer 40 by pouring asphalt or concrete on top of the waterproofing layer (20).

Meanwhile, the waterproof layer 20 is separately manufactured in a sheet shape in which the primary waterproofing agent coating layer 24, the secondary waterproofing agent coating layer 26, and the tertiary waterproofing agent coating layer 28 are integrally manufactured. In the process of performing the waterproof construction may be bonded to the upper surface of the primer coating layer (22).

Reinforcement is buried in the middle of a plurality of waterproofing coating layers to prevent the water flowing from the road pavement layer to penetrate into the top plate made of reinforced concrete after the top plate is formed in the process of building bridges and elevated roads as described above In the process of forming a road pavement layer or after the road is completed, the cracks in the waterproof layer are prevented even if a momentary load is applied due to repeated loads due to repetitive traffic passages and sudden stops and sudden starts of large vehicles. There is an advantage.

Claims (3)

In the structure in which the primer coating layer is formed on the upper side of the top plate before the road pavement layer is formed on the upper plate of the bridge and overpass, and a waterproof layer is formed on the primer coating layer to prevent water from penetrating. In the middle portion of the waterproof layer 20 formed between the primer coating layer 22 and the road pavement layer 40, a mesh-shaped reinforcement 30 woven with synthetic fiber fibers is embedded. Waterproof layer structure. The method of claim 1, The waterproof layer 20 in which the mesh-shaped reinforcing material 30 is embedded is a waterproof layer structure of bridges and elevated road bridges, characterized in that formed in a plurality of layers. The method of claim 1, The main raw material of the waterproofing agent applied to the waterproofing layer 30 is a chloroprene-based synthetic resin material, characterized in that the bridge layer and the elevated road bridge waterproof layer structure.