KR100237194B1 - Method for constructing built-up upper plate of a bridge using epoxy in the connected part - Google Patents

Abstract

The present invention relates to a prefabricated bridge top plate method using epoxy as a connecting part. The top plate which protrudes from the reinforcement on the front, rear, left and right walls of the top plate body formed by reinforcing bars and placing concrete to form a plate form a plurality of connecting rings. While passing through the vehicle in most lanes, the existing top plate is partially dismantled, the top body is placed on the exposed main girder, and the tops are connected to each other, and epoxy mortar is applied to the gap between the top body and the gap between the top body and the main girder. By injecting and joining, and constructing ascon on it to complete the partial top plate construction, and sequentially constructing a portion of the existing top plate adjacent to this while passing the vehicle through the lane corresponding to the completed top plate. It can reduce construction cost and air while high bonding strength. It was, it is possible to simplify the construction while allowing the passage of vehicles in the most charitable. In addition, the upper body itself is made of precast type of reinforcing steel and concrete without using a reinforcing frame made of iron plate, thereby reducing the weight and simplifying handling.

Description

Prefabricated bridge deck method using epoxy

The present invention relates to a prefabricated bridge deck method using epoxy as a connecting part, and in particular, the bonding strength is high, the construction cost and the air can be reduced, and the construction can be easily carried out while allowing the vehicle to pass in most lanes, and the weight is reduced. It is simple, and even though it is composed of a precast type, the fastening force between each upper plate joint is strong, so that the joint state between the upper plates can not be easily relaxed and separated by vibration or impact load caused by the passage of the vehicle. The present invention relates to a prefabricated bridge deck method using epoxy at the connection part, which can not easily damage the periphery of each deck and consequently extend the service life of the entire bridge.

Most of the bridges and elevated roads in Korea are deteriorated and damaged frequently due to the deterioration of the slabs of the top plate, so fundamental repair measures are urgently needed.

As an example of the repair method for the damage of the bridge deck, the emergency repair work that is limited to the damaged part, that is, the emergency repair work using super-hardening cement, is carried out.

On the other hand, in view of the above problems, there has been known a construction method of the upper bridge structure to prefabricated to install a precast (precast) plate having a predetermined standard on the upper part of the main girder (main girder).

In addition, the present applicant is a bridge for joining the reinforcement frame by welding by constructing a concrete upper plate body formed with alternating joining protrusions and joining grooves alternately, and a reinforcing frame surrounding the edge of the upper plate, as in Korean Utility Model Registration No. 96,795 He developed tops.

However, in the above-mentioned emergency repair work method, as the repaired part constructed by the super-hardening cement is damaged within only a few years (2 to 3 years), the repair work of the top plate needs to be repeated periodically, as well as the repair as described above. The work required a lot of construction cost and air, and during the maintenance period, the traffic of the vehicle must be completely restricted.

In addition, in the construction method using the above-described assembly top plate, the assembly top plate is made of a rectangular plate-shaped precast concrete structure in which a tension member such as reinforcing bar is disposed therein. Each floor plate is connected vertically and horizontally by filling concrete mortar between the planar joints on both sides. The fastening force between the top plate joints is weak so that the joining state between the top boards is easily relaxed and separated by vibration or impact load caused by the passage of the vehicle. As a result, the horizontality of the entire bridge deck becomes uneven and the periphery of each deck is easily damaged, resulting in a significant shortening of the service life of the entire bridge.

In addition, in the case of using the bridge deck as described above, the joint strength is high, the construction cost can be reduced, the air can be reduced to some extent, and the construction can be performed while permitting the traffic of most lanes without full control of the traffic passage. Although there is an advantage, the reinforcing frame has to be joined by welding, so the work is cumbersome and the air is delayed by the time required, and the weight of the steel plate constituting the reinforcing frame becomes heavy, making it difficult to handle for construction.

An object of the present invention is to provide a prefabricated bridge deck method using epoxy to the connection portion that can be high construction strength and construction cost and air can be easily installed while allowing the passage of the vehicle in the majority and lanes.

Another object of the present invention is to be made of precast type of reinforcing steel and concrete to reduce the weight and to simplify the handling.

Another object of the present invention is a precast type, but the fastening force between the joints between the top plate is strong, so that the joint state between the top plate is not easily loosened, separated by vibration or impact load caused by the passage of the vehicle, the horizontal of the entire bridge top plate The aim is to ensure uniformity and not to easily damage the periphery of each deck, resulting in extending the service life of the entire bridge.

1 is a partial cutaway perspective view of a prefabricated top plate according to the present invention.

2 is a perspective view of a state in which the main girder image is placed on the top plate according to the present invention.

3 is a plan view of a state where a pair of girders are exposed by removing a part of the existing top plate.

4 (a) is a plan view of the top plate of the present invention between the pair of girders combined with the girder and the top plate.

Fig. 4 (b) is a cross-sectional view taken along the line A-A of Fig. 4 (a) showing the case of a precast girder.

Fig. 4 (c) is a cross-sectional view taken along the line A-A of Fig. 4 (a) showing a flat girder.

Figure 5 (a) is a perspective view showing a state in which the top plate is bound with a connecting bar.

Figure 5 (b) is an enlarged view of the portion B of Figure 5 (a), a perspective view showing the binding process.

6 (a) is a plan view in which epoxy mortar is injected between upper plate bodies.

Fig. 6 (b) is a cross-sectional view taken along the line C-C in Fig. 6 (a).

7 is a plan view showing a state in which a pair of girders are exposed by removing the existing top plate corresponding to the next girder.

8 (a) is a plan view in which the top plate of the present invention is placed between the exposed girders, the girder and the top plate are bonded, and the top plate is bound to inject resin.

FIG. 8 (b) is an enlarged plan view of part D of FIG. 8 (a) showing the connection structure of the upper plate.

8 (c) is a cross-sectional view taken along the line E-E of FIG. 8 (a) showing a precast girder.

Fig. 8 (d) is a cross sectional view taken along the line E-E of Fig. 8 (a) showing a flat girder.

9 is a plan view showing a top plate arrangement state.

10 is a sectional view taken along the line F-F in FIG.

FIG. 11 is a longitudinal sectional view showing the top plate arrangement of the entire bridge. FIG.

12 is a longitudinal sectional view showing a construction state of the handrail part.

* Explanation of symbols for main parts of the drawings

10: top plate body 11: side wall

12: handrail 21,22: rebar

23,24: Hook 25: Hook

26: connecting bar 31: anchor bar

32: anchor bolt

In order to achieve the object of the present invention, to remove a portion of the upper plate of the existing bridge to remove at least two of the main girder to expose all or part of the top plate: a top plate to put a plurality of the top body on the exposed main girder An array step; A connecting step of connecting the connecting rings protruding from the front and rear and left and right walls of the upper plate body by connecting bars by connecting bars; Bonding step of injecting epoxy mortar into the gap between the upper plate main body and the gap between the upper plate main body and the main girder to join adjacent upper plate main bodies and the upper plate main body and the main girder; Ascon construction step of constructing ascon on the top plate after the epoxy mortar is solidified; First, the prefabricated bridge deck method using epoxy is used for connecting the first and the adjacent decks, and the decking step, the stacking step, the connecting step, the joining step, and the ascon construction step are sequentially provided.

Hereinafter, the prefabricated bridge deck method using the epoxy according to the present invention in the connecting portion will be described in detail according to the embodiment shown in the accompanying drawings.

1 is a perspective view showing a state of coupling between the prefabricated bridge top plate and the main girder using the epoxy according to the present invention in the connecting portion, Figure 2 is a partial cutaway perspective view of the prefabricated bridge top plate according to the present invention, as shown therein, Reinforcing bars (21, 22) are arranged in the interior of the (10) protruding from the front and rear, left and right wall surface 11 of the upper plate body 10 to form a connecting ring (23, 24) bent in a substantially "c" shape will be.

In the reinforcement of the reinforcing bars 21 and 22, the connecting rings 23 and 24 are formed by protruding the reinforcing bars into a zigzag and protruding in front and rear and left and right wall surfaces 11 of the upper plate body 10 in a “c” shape. To make it possible.

In addition, the reinforcing bars (21, 22) as shown in Figure 4 (b) and 4 (c) also protrudes from the bottom surface of the upper body 10 to support for reinforcing the bonding strength when the coupling with the main girder To form a ring 25.

Hereinafter, a process of constructing a bridge using a prefabricated bridge top plate using epoxy according to the present invention will be described.

[Existing roof demolition stage]

As shown in FIG. 3, a part of the upper plate to be repaired, ie, the upper plate installed between the main girders G1 and G2 on one side of the bridge, is removed so that the main girders G1 of the portion are completely exposed. The main girder (G2) only exposes about half.

At this time, the main girder G2 is exposed to about half by cutting the entire ascon and the swash plate along the center line of the main girder G2 adjacent to the upper plate to be removed.

40 are piers in FIGS. 3 and 11.

[Tops Arrangement Step]

A support ring 25 protruding from the bottom surface of the top plate body 10 by placing the top body 10 on the main girders G1 and G2 exposed in the existing top plate removing step as shown in FIG. ) To the main girders (G1, G2) to be caught on the protruding anchor reinforcement 31 or anchor bolts (32).

Here, in the case where the main girders G1 and G2 are precast girders, as shown in FIG. 4 (b), the anchor reinforcement 31 is protruded, and in the case of the flat girders. It is preferable to make the anchor bolt 32 protrude as shown in FIG. 4 (c).

[Top Connection Step]

When the upper body 10 is mounted on the main girders (G1, G2), as shown in FIG. 5 (a), the connecting rings (23, 24) between the adjacent upper body 10 is bound to the connecting reinforcement (26) Connect.

In the case of connecting the connecting rings 23 and 24 with the connecting bars 26, as shown in FIG. 5 (b), a pair of arm parts 26a are connected with the connecting parts 26b and bent in a roughly “c” shape. The connecting bar 26 is formed so that the connecting part 26b spans the connecting rings 23 and 24 of the upper plate main body 10 which is lifted up, and then the two arm parts 26a are bent by 180 °. 23 and 24 are bound by the connecting reinforcing bar 26.

[Join Step]

When the connecting rings 23 and 24 of the upper plate main bodies 10 are connected, the gap C1 formed between adjacent upper plate main bodies 10 as shown in FIGS. 6 (a) and 6 (b). Epoxy mortar (E) is injected into the part and the epoxy mortar (E) is inserted into the gap C1 between the adjacent upper body 10 and the gap C2 between the main girders G1 and G2 and the upper body 10. The filling is such that the upper plate body 10 and the upper plate body 10 and the main girders (G1, G2) and the upper plate body 10 are bonded by an epoxy mortar (E).

[Ascon construction stage]

When the epoxy mortar (E) is solidified and the bonding between the top plate and the top plate and the top plate and the main girder is completed, ascon is applied to the top surface of the top body 10 in a conventional manner.

[Repeat construction stage]

In this way, when the first top plate construction is completed, as shown in FIG. 7, the main plate G2 and G3 are removed by removing the top plate adjacent to the constructed top plate while passing the vehicle to the lane corresponding to the top plate constructed as shown in FIG. About half of the centerline of the lens is exposed.

The top body 10 is placed between the exposed main girders G2 and G3. This, as shown in the eighth (a) is the first top plate body 10 and the top plate body 10 to be constructed this time as if stacked so that overlapping with the dolseok.

Next, as described above, the upper plate main bodies 10 are mounted on the anchor reinforcement 31 or anchor bolts 32 formed on the main girders G2 and G3, and the upper plate main bodies 10 as shown in FIG. 8 (b). Bonded by connecting reinforcing bars 26, epoxy mortar E is injected into the gap C1 between the upper plate main bodies 10 and the gap C2 between the upper plate main body 10 and the main girders G2 and G3. The upper main body 10 is fixed to the main girder (G2, G3) and to be coupled to each other.

8 (c) shows that when the main girder is a precast girder, the anchor reinforcement 31 is typed on the main girders G2 and G3, and the support ring 25 protruding from the bottom of the upper plate body 10 is placed thereon. 8 (d) shows an anchor bolt 32 on the main girders G2 and G3 when the main girders are flat girders, and a support ring protruding from the bottom surface of the upper plate main body 10 thereon. 25) put it on. In FIGS. 8 (c) and 8 (d), A is ascone.

In the binding of the upper plate main body 10, as shown in the eighth (b), the connecting ring 23, 24 of the upper plate main body 10 by the connecting reinforcing bar 26, and the first ring of the first construction (23, 24) also binds to the connecting bar (26).

In this way, the top plate corresponding to the main girders G4, G5, G6, etc. are sequentially installed to construct the entire bridge top plate.

9 shows an example of the arrangement of the upper plate main body 10 for the entire bridge upper plate, and the number and length of the upper plate main bodies 10 for one span are set according to the span length of the bridge.

In the city example, when the length is 30m, the 15m top plate body and the 7.5m top plate body are alternately arranged so that they are arranged in a stacking manner.

Figure 10 shows the stress acting on the upper plate body 10 in the completed construction state, the tensile stress on the upper side, the compressive stress on the lower side in the connection between the upper plate body 10, the upper plate in the main body 10 It can be seen that the compressive stress, the tensile stress acts on the lower side.

Figure 11 is a longitudinal cross-sectional view showing a state in which construction is completed by the present invention, you can see the result of the construction of all the top plate between the bridge piers. However, the ascon which is constructed on the upper plate main body 10 is omitted.

On the other hand, in the construction of the handrail portion of the bridge, as shown in FIG. 12, the method described above using the handrail upper plate body 10 in which the handrail portion 12 is integrally formed on one side of the upper plate body 10 described above. It can be installed by.

That is, the inner ring body (10) is formed inside the connecting ring (23, 24) protruding from the reinforcing bar (21, 22) as described above, the outer side of the handrail 12 is used integrally formed It is.

As described above, according to the present invention, since the construction is completed by binding and connecting the upper plate of the rebar and the concrete precast type with connecting bars and injecting epoxy mortar into the gap therebetween, And it can reduce the air, and in most lanes to allow the passage of the vehicle will be able to install easily. In addition, the upper body itself is made of a precast type of reinforcing steel and concrete without using a reinforcing frame made of iron plate, thereby reducing the weight and simplifying handling.

Claims (4)

Removing the existing top plate of the existing bridge to expose all or part of at least two main girders; A top plate arrangement step of placing a plurality of top body bodies on the exposed main girders; A connecting step of connecting the connecting rings protruding from the front and rear and left and right walls of the upper plate body by connecting bars by connecting bars; Bonding step of injecting epoxy mortar into the gap between the upper plate main body and the gap between the upper plate main body and the main girder to join adjacent upper plate main bodies and the upper plate main body and the main girder; Ascon construction step of constructing ascon on the top plate after the epoxy mortar is solidified; A prefabricated bridge deck method using epoxy as a connecting part, characterized in that the first step of the top plate and the adjacent top plate is sequentially carried out the demolition step, the arrangement of the top plate, the connecting step, the bonding step and the ascon construction step. The method of claim 1, wherein in the arranging of the upper plate, an epoxy is used for the connecting part, the prefabricated bridge top method is characterized in that the stacking is arranged in a bridge. The method of claim 1, wherein in the arrangement of the upper plate, an anchor reinforcing bar is formed on the main girder, and a support ring protruding from the bottom of the upper main body is supported on the anchor reinforcing bridge. . The method of claim 1, wherein in the arrangement of the upper plate, an anchor bolt is formed on the main girder, and the supporting ring protruding from the bottom of the upper plate body is supported by the anchor bolt. .

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