KR101096087B1 - Method of repair work on road and bridge deck flexible joints - Google Patents

Abstract

PURPOSE: A method of repairing the flexible connection of roads and bridges is provided to prevent and repair chemical corrosion by calcium chloride or damages due physical impacts by vehicles in an environment friendly manner and ensure excellent cost effectiveness and safety. CONSTITUTION: A method of repairing the flexible connection of roads and bridges is as follows. The surface of the damaged parts of the side of the flexible connection(14) constructed on roads and bridges is ground and removed. A plurality of fixtures(11) are driven and fixed onto the surface of a grinding part at regular intervals. A core material(12) is placed between the fixtures so that the core material maintains a given height from a grinding surface. The fixtures and the core material are buried, and concrete mixture is placed on the grinding part to forms the same surface to road surface.

Description

Method of repair work on road and bridge deck flexible joints}

The present invention relates to a construction method for repairing new joints of roads and bridges, and more particularly, to a method for repairing new joints of roads and bridges in an eco-friendly manner as well as simple and economical repair.

In general, road structures such as bridge decks, underground roadways, river cover structures, parking lot floors, and the like, the pavement layer undergoes repeated expansion and contraction with seasonal temperature changes, unbalance of static and dynamic loads and stresses exerted by the vehicle, and aging. Partially cracking may occur due to various factors such as ground subsidence.

When rainwater or the like penetrates the cracks, the cracks become larger and eventually lead to breakage of the road, which not only impedes traffic, but also increases the risk of causing safety accidents.

In addition, as a structure having expansion joints, for example, bridges, overpasses, solid intersections or underground passages, a certain width between the upper plates to accommodate the expansion and contraction of the components such as bridge decks, girders, bridges or alternators Construction of the expansion joint having a.

In general, expansion joints are made of steel anchors, pavement by simple sealing materials, etc., but in the former case, noise is generated when the vehicle passes, and in the latter case, road structures are increased in summer when the temperature is high. As the clearance narrows, the sealant swells above the road surface, and in winter, when the temperature is low, the clearance of the road structure increases and the sealant is struck, resulting in obstacles in traffic.

In view of such a point, in recent years, a lot of expansion joints have been constructed in which the expansion joint and the sealing material are properly combined.

However, since these expansion joints have the highest fatigue strength among the bridge structures, they are easily damaged when sudden impacts are continuously applied during the passage of the vehicle. Therefore, the expansion joints are newly constructed for safe communication of the vehicle and the life extension of roads and bridges. Appropriate reinforcement around the joint should be carried out.

For example, as the concrete part (asphalt), which closes the side of a conventional expansion joint, is damaged by physical shock and corrosion of the vehicle and climatic requirements, the life of the structure is shortened, and accordingly, proper repair is performed. Work should be done.

However, in the conventional repair method, all the expansion joints and the side concrete (asphalt) must be dismantled to be repaired again. Therefore, the construction is not easy, eco-friendly and economically inferior, and the traffic is delayed due to the delay of working time. There is a problem that causes.

The present invention is to provide a simple repair method,

Therefore, the surface of the expansion joint side concrete (asphalt) part, which is a broken part, is removed by a surface polishing device about 2 to 3 cm, and then the resin mortar or MMA resin that can impart a rapid elasticity and ground elastic force. By filling with the back, the purpose is to provide an excellent environmentally friendly, safe and economical repair method.

The present invention,

1. As the thickness of the repair surface is thin, it provides an erosion prevention means to prevent the resin mortar and MMA resin, which has elasticity of its own material, from hardening itself due to weather and vehicle load requirements after curing.

At this time, the erosion prevention means is provided with a plurality of fasteners that can be fixed and fixed to a fixed height and a uniform width of the lattice-shaped repair surface, consisting of a core material to be connected to each of the fasteners, repair equipment After the installation of the resin mortar and MMA resin poured on the upper side and finished by flattening work is completed.

At this time, the resin mortar and MMA resin may include an iron core in order to prevent self-bonding strengthening and cracking after curing, and also by adding a PS ball to prevent slipping and glass beads to improve road visibility at night. Can be.

2. The repairing method using the above-mentioned repair apparatus,

First, the surface of the expansion joint side breakage part such as a road and a bridge is polished and removed by a surface polishing apparatus about 2-3 cm.

Next, after cleaning the surface of the polishing portion, the nail-shaped fixture of the repair apparatus is fixed at regular intervals.

At this time, the fixture is configured to be fixed to a certain height when fixing with a hammer or the like.

That is, by forming a protrusion in the middle of the lower body portion of the head portion, only the end of the body is inserted into the ground when it is driven, and each of the fasteners is connected to each other by zigzag by winding a core material to be described later.

The core material which is pulled and connected to this maintains a uniform height on the ground.

At this time, the length of the body to be inserted into the ground was about 1cm, the reason is that when the repair work later repaired again, the nail is not stuck to the ground and fall out of the ground with polishing.

Next, a resin mortar and / or MMA resin mixed with an iron core having a predetermined length, and accessories such as PS balls and glass beads are poured onto the polishing surface.

Next, after completing the flattening work to the height of the expansion joint and curing quickly, the work is completed.

The present invention does not dismantle all of the expansion joint repair surface, and after polishing only the surface of the damaged part, simply install a repair device on the polishing surface (ground), and then pour resin mortar and / or MMA resin having elastic force. When the flat work is completed, all the work is completed, so easy repair and construction can be achieved quickly and can reduce the impact reduction and noise even when driving the vehicle.

Accordingly, the present invention is an invention that can be more environmentally friendly, economical, and more secure.

Figure 1a is a cross-sectional view showing the structure of the expansion joint constructed by the repair method according to an embodiment of the present invention
FIG. 1B is a partially enlarged view of FIG. 1
Figure 2 is a plan view showing the structure of the expansion joint constructed by the repair method according to an embodiment of the present invention
3 is a cross-sectional view showing the structure of the expansion joint constructed by the repair method according to another embodiment of the present invention
Figure 4 is a perspective view showing the connection between the fixture and the core in the repair device according to an embodiment of the present invention
Figure 5 is a front view showing various forms of the iron core in the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1A, 1B and 2 are a cross-sectional view and a plan view showing the structure of the expansion joint constructed by the repair method according to an embodiment of the present invention.

As shown in Figure 1a, 1b and Figure 2, here shows an example of a repair method for the expansion joint 14 is installed on the upper plate of the bridge, the repair device and the repair method of the present invention described below In addition to the tops of bridges, it can be equally applied to repairing road structures such as underground cars, river cover structures, and parking lot floors.

The upper plate of the bridge is constructed of asphalt 15 and concrete 16, and has a structure in which the expansion joint 14 having a predetermined width is constructed between the upper plate.

When abnormalities such as breakage occur around the expansion joint part 14 in the upper plate of such a structure, it should be repaired. In the present invention, only the main surface of the expansion joint part 14 is effectively replaced without replacing the entire upper plate. Provide a device for construction.

To this end, the concrete base layer 10 is formed below both sides of the expansion joint 14 at a predetermined depth, and the concrete base layer 10 has a width of about 30 to 40 cm and about 6 to 9 cm. It is possible to have a layer thickness of the degree.

Erosion preventing means is installed on the surface of the concrete base layer 10 in order to prevent the post-pouring concrete post-treatment layer 13 is self-erosion by the requirements of weather and vehicle load after curing.

At this time, the erosion prevention means may be composed of a plurality of fasteners that can be fixed by driving a fixed height and a uniform width of the lattice-shaped maintenance surface and the core material to be connected to each of the fasteners.

For example, a plurality of fasteners 11 are fixedly installed in a grid arrangement on the upper surface of the concrete base layer 10, and the cores 12 such as wires or wires are connected and installed between the fasteners 11 thus installed. do.

In particular, as shown in Figure 4, the fastener 11 is composed of a head portion (11a) and a predetermined length of the body portion (11b), the portion of the body portion (11b) about the middle of the length of the projections (11c) ) Is formed.

Accordingly, the fastener 11 is inserted into and fixed to the concrete base layer 10 only about 1 cm in length from the lower end of the body portion 11b below the protrusion 11c.

By inserting the fastener 11 only about 1 cm of the length of the body portion, there is an advantage that the fastener 11 does not get stuck in the ground and is easily removed from the ground with polishing after re-repairing later. .

In addition, the core material 12 is connected to the lower end of the head portion 11a of the fastener 11 and the upper body portion 11b portion of the protrusion 11c by using both ends connected to the installation form, the connection installation at this time The shape may be various shapes such as zigzag shape, lattice shape, mixed form of zigzag shape and lattice shape.

In addition, on the concrete base layer 10 on which the repair device is installed, that is, the fixture 11 and the core material 12 are provided, the concrete post agent layer 13 is formed as a finishing layer for forming a road surface.

At this time, the concrete futase layer 13 may be formed of a resin mortar or MMA resin, or a mixture of resin mortar and MMA resin, in particular in order to prevent cracking and strengthening of the resin mortar and MMA resin after curing. Iron core 20 of Figure 5 or a known PS ball, such as glass beads (not shown) may be made in the form of mixing together.

In addition, the concrete futase layer 13 may be formed in the form of adding a PS ball for preventing slip, glass beads for improving road visibility at night.

Meanwhile, as shown in FIG. 3, an aramid fiber layer 17 may be formed between the concrete base layer 10 and the concrete futase layer 13 as a means for reinforcing adhesion between the layers.

Here, the aramid fiber is a fiber having a very excellent tensile strength, elastic modulus, heat resistance than the organic fiber, and serves as a concrete layer reinforcement and seismic reinforcement with excellent tensile strength and ductility.

That is, by forming the aramid fiber layer 17 between the concrete base layer 10 and the concrete futase layer 13, it is possible to protect the concrete surface after reinforcement and increase durability.

Therefore, a method of repairing the expansion joint using the repair device configured as described above is as follows.

First, the step of grinding and removing the surface of the side breakage portion of the expansion joint 14 installed on the road and the bridge is performed.

In other words, the surface of the side surface of the expansion joint, such as the road and the bridge, is polished to a depth of about 2 to 3 cm and a width of about 30 to 40 cm by a surface polishing device.

On the other hand, prior to installing the fixture on the surface of the polishing portion, by applying an aramid fiber layer on the surface of the polishing portion may be performed to enhance the adhesive force with the concrete futases poured in the subsequent step.

Of course, the application of the aramid fiber layer at this time can be applied at any stage before the step of applying the concrete post-agent layer.

Next, the step of fixing by fixing a plurality of fasteners at a predetermined interval on the surface of the polishing unit.

That is, after cleaning the surface of the polishing part, the nail-shaped fixture 11 of the repair apparatus is fixed at regular intervals.

At this time, the fixture 11 is fixed to a certain height when fixed with a hammer or the like.

For example, a protrusion 11c is formed in the middle of the body portion 11b extending downward of the head portion 11a so that only the lower end portion of the body portion 11b is inserted into the ground (concrete base layer) when it is driven. .

In particular, the length of the body portion 11b inserted into the ground was about 1 to 2 cm, and the reason for this is that if the polishing work is performed again later, the fixture is not stuck to the ground and falls out of the ground with polishing. It is.

Next, the core member 12 is connected between the fixtures 11.

At this time, both ends of the core member 12 is wound around the body portion 11b between the head portion 11a and the protrusion 11c of the fastener 11 to be connected to each other, so that each fastener 11 is connected in a zigzag. .

In particular, the core material 12 is to be in tension and connected to maintain a uniform height on the ground.

Next, while the fixture 11 and the core 12 is buried, the concrete admixture is poured on the polishing unit to perform the construction to form the same surface as the road surface.

At this time, it is preferable to use resin mortar and / or MMA resin in which the admixtures such as iron core, PS ball, glass beads, etc. are mixed.

That is, the step of pouring a resin mortar and / or MMA resin mixed with the iron core 20 having a predetermined length and the accessories such as PS balls, glass beads and the like is carried out.

Next, when the flattening work is completed in accordance with the height of the expansion joint 14, and hardened quickly, the operation for repairing the expansion joint may be completed.

As described above, the repairing method of the present invention uses a concrete futasase made of resin mortar or MMA resin to which various accessories are added, thereby preventing and repairing environmentally friendly and preventive damages such as chemical corrosion caused by calcium chloride or physical impact caused by traffic. As a construction method, it is an environmentally friendly, economical and safety, as well as the extension of the life of the structure, easy to repair and fast passage during repair, and is an excellent method that can reduce the impact during driving.

10 concrete base layer 11 fixture
12: core material 13: concrete futaze layer
14 expansion joint 15: asphalt
16: concrete 17: aramid fiber layer
20: iron core

Claims (7)

delete delete delete delete Polishing the surface of the elastic joint side breakage part of the road and the bridge by grinding the surface polishing apparatus by about 2-3 cm;
Fixing a plurality of fasteners to a surface of the polishing unit at a predetermined interval by a depth of 1 to 2 cm;
Connecting the core material between the fixtures and installing the core material to maintain a predetermined height from the polishing surface;
And placing the concrete admixture on the polishing unit while the fastener and the core are tangled, thereby constructing the same surface as the road surface.
In the step of connecting and installing the core between the fasteners, the core is connected between the fixture in a zigzag form or a grid form or a zigzag form and the grid form, characterized in that the installation of the expansion joint repair method of the bridge.
The method of claim 5, wherein the concrete futase in the step of constructing the concrete futase is a stretch of the road and bridge, characterized in that using a resin mortar and / or MMA resin mixed with an accessory such as iron core, PS ball, glass beads Genital repair method.
The method according to claim 5, wherein after the step of polishing and deleting the surface of the expansion joint side breakage portion of the road and the bridge, an aramid fiber layer is applied to the surface of the polishing portion to enhance adhesion to the concrete futases cast in a subsequent step. New joint repair method for roads and bridges, characterized in that it further comprises the step of enabling.

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