KR20030014002A - Construction method and apparatus for enforcement of bridge beam - Google Patents

Abstract

PURPOSE: A reinforcing method of a bridge beam is provided to simplify reinforcing works without damaging the existing bridge structure. CONSTITUTION: The reinforcing method of a bridge beam comprises the steps of: installing a steel plate joint bracket(50) on both outer sides of adjacent outer bridge beams(3,4); installing saddle brackets(7,8) to both inner sides of the bridge beams(3,4) respectively; installing saddle brackets(7,8) to both sides of adjacent inner bridge beams(3,4); fastening the facing saddle brackets(7,8) with steel bars(16); installing support brackets to the middle lower end of the bridge beams(3,4); installing a sheath pipe to the steel pipe joint bracket(50) and the saddle brackets(7,8) through the support brackets; interposing a steel wire in the sheath pipe; and tensioning both ends of the steel wire to compensate deflection.

Description

Bridge beam reinforcement and its device {CONSTRUCTION METHOD AND APPARATUS FOR ENFORCEMENT OF BRIDGE BEAM}

The present invention relates to a bridge beam reinforcement method and apparatus thereof, in particular, by fixing both sides of the bridge beam constituting the bridge by using a steel plate joint bracket and a saddle bracket having a bracket welded to both ends of the steel sheet, a steel bar to the saddle bracket It is to make it easy to endure the reinforcement work without damaging the existing bridge structure by inserting and fixing it.

In general, after the bridge is installed, the life of the bridge is shortened or the installed bridge is broken due to various external factors (sag deflection due to lack of cross section, vehicle size increase, traffic volume increase, and age of bridge beam).

As a means to prevent such accidents and to extend the life of the bridge, the reinforcing bars are embedded by drilling through-holes on both sides of the bridge beam to be repaired, and the supporting part on which the reinforcing concrete is poured so that the other bars cross on both sides of the exposed rebar. After fixing the steel wire of several strands with a mounting hole in the support portion there is a repair method to tension the sagging bridge beam to maintain the horizontal state using a tensioning device.

The above repair method caused a lot of manpower and construction period in the process of placing concrete by drilling through-holes on both sides of the bridge beam, and placing concrete on the rebars exposed to both sides. In the process of drilling, there was another problem that the rigidity of the bridge beam is lowered by breaking or breaking the reinforcing bars or steel wires provided therein.

As a means for solving the problems in the method of repairing the bridge beam has been proposed a "repair method and repair device for the bridge beam" of the Patent No. 0141551 developed by the present applicant.

The proposed bridge beam repair method includes the steps of installing steel support brackets on both ends of the bridge beam in the longitudinal direction of the bridge beam to correct the deflection deformation and reinforce the rigidity, and a plurality of intermediate support brackets in the middle of the bridge beam and both sides thereof. An intermediate support bracket installation step of installing a kit, and a strand support installation step of guiding and supporting the intermediate part of the stranded wire to the intermediate support bracket and observing and supporting both ends of the stranded wire through the fixing member fixed to the steel support bracket; It consists of a deflection correction step of correcting deflection of the bridge beam by tensioning both ends of the strand.

In addition, the repair device for the bridge beam includes an iron support bracket fixed to both ends of the bridge beam, a plurality of iron intermediate support brackets fixed below the middle of the bridge beam, and a fixing member fixed to the iron support bracket. And a stranded wire which is supported at an intermediate portion of the intermediate supporting bracket, and both ends thereof are fixed in a tensioned state by a fixing member provided in the steel supporting bracket.

However, the repair method and the repairing device of the bridge beams are very effective to apply to the beam beams without cross beams and simple beams. However, in the case of the bridge beams that are continuous in the process of installing the steel support brackets, Since the concrete parts between the bridge beams must be removed, the bridge structure is severely damaged, which shortens the life of the bridge beam, and in the case where the cross beam is provided between the bridge beam and the bridge beam, the cross beam is severely broken so that the bridge beam is damaged. There was another problem that the intensity of the accident is lowered, the risk of accidents are increased, and the construction period is increased, thereby increasing the cost of construction.

The present invention has been made in order to solve such a problem as fixing the steel plate joint bracket having a bracket welded to both ends of the steel sheet on the outside of both ends of the bridge beam, and fixing the saddle bracket on both sides of the bridge beam inside the existing bridge structure The purpose of the present invention is to provide a bridge beam reinforcement method and a device for efficient work by reducing the construction period and construction cost by making the bridge beam easy to extend the lifespan of the bridge beam. have.

The present invention for achieving the object of the present invention comprises the steps of installing the iron support brackets on both ends of the bridge beam, the intermediate portion and the intermediate support brackets on both sides thereof, the intermediate support brackets and both ends support In the bridge beam reinforcement method comprising the step of installing a strand to support the support through the mounting member fixed to the bracket and the deflection correction step of correcting the deflection of the beam by tensioning both ends of the strand,

Installing steel plate fitting brackets welded to the first and second brackets at both ends of the steel sheet; Installing a saddle bracket; Fastening the saddle bracket with a steel bar; Injecting epoxy into the steel plate bracket and the saddle bracket; Installing a support bracket; Fixing a support bracket to a lower end of the bridge beam; Fastening a steel bar between the saddle brackets by drilling a through hole in the cross beam; Installing a sheath tube on the steel plate fitting bracket and the saddle bracket via the support bracket; Inserting the strand into the sheath tube; It is achieved by providing a method for reinforcing a bridge beam, characterized in that it comprises a step of correcting the deflection of the bridge beam by tensioning both ends of the strand.

1 is a front view of a bridge beam is installed reinforcement device according to the invention.

2 is a plan view of a bridge beam is installed reinforcement device according to the invention.

Figure 3 is an enlarged front view of the main portion showing a state in which the reinforcing device according to the present invention is installed on the outer surface of the bridge beam.

Figure 4 is an exploded perspective view of the reinforcement device installed on the outer surface of the bridge beam according to the present invention.

Figure 5 is an enlarged rear view of the main portion showing a state in which the reinforcing device according to the present invention is installed on the inner surface of the bridge beam.

Figure 6 is an exploded perspective view of the reinforcement device installed on the inner surface of the bridge beam according to the present invention.

7 is a plan view of a bridge beam showing a state in which another reinforcing device is installed according to the present invention.

<Brief description of symbols for main parts of the drawings>

3.4: bridge beams 5, 6: 1 and 2 bracket

7,8: Saddle Bracket 9: Work Through

10: Fixing bolt 11, 12, 13: Support bracket

14: Garbo 15: Through-through

16: First steel bar 17: Epoxy resin

18: Sheath Building 19: Steel wire

50: Steel joint bracket 60, 61: Saddle bracket

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

Reinforcement device 1 of the bridge beam according to the present invention is a steel plate bracket for fixing both ends of the bridge beam (3) (4) seated on the upper portion of the bridge (2) as shown in Figs. (50), a saddle bracket (7) (8) fixed inside the bridge beam (3) (4) facing the steel plate fitting bracket (50), the steel plate fitting bracket (50) and the saddle bracket (7) Fixing bolt 10, which is a fixing means for securing the support force to secure (8) to the bridge beam (3) (4) at the same time on both sides by using a working through hole (9), and the bridge beam (3) (4) It is inserted into a plurality of support brackets 11, 12, 13 fixed to a predetermined distance below the center portion and through holes 15 drilled in the cross beams 14 on both sides of the saddle brackets 7, 8, respectively. Epoxy resin 17, which is injected to prevent the corrosion of the fixed first steel bar 16, the steel plate fitting bracket 50 and the saddle bracket (7) (8) and at the same time to increase the fixing force, and the support bracket (11) (12) (13) Steel plate joints via Sheath pipe (18) installed in the jacket 50 and saddle bracket (7) (8) and the strand wire (19) inserted into the sheath pipe (18), the sheath pipe is injected with grease for rust prevention and lubrication. .

Here, the steel plate fitting bracket 50, as shown in Figure 4, as the first and second brackets 5, 6 are integrally provided as a welded joint at both ends of the steel plate 20 having a predetermined area, variable The length of the steel sheet 20 can be adjusted according to the distance between the bridge beams 3 and 4 to be properly connected.

In addition, the first bracket 5 is provided with a plurality of first reinforcing members 21 having a triangular shape with a different length on the side exposed to the outside, the first reinforcing members 21 of different directions Between the first supporting member 23 is formed integrally with the first locking hole (22).

In addition, a plurality of holes 24 are formed on the front surface of the first bracket 5 provided with the first reinforcing member 21, so that the anchor bolt 25 is used to secure the side surfaces of the bridge beams 3 and 4. It is provided to be fixed.

In addition, an insertion hole 26 into which the fixing bolt 10 is inserted is integrally formed at the free end side of the first bracket 5, and the second bracket 6 having the same shape is formed in the center of the steel plate 20. It is provided to be symmetrical with respect to.

As shown in FIG. 6, the saddle brackets 7 and 8 face a plurality of second reinforcing members 28 having triangular shapes with different lengths on one side of the panel 27 having a rectangular shape. It is provided, between the second reinforcing member 28 is provided with a second support member 30 and the fixing bolt insertion hole (27a) is formed integrally with the second locking hole (29).

In addition, a plurality of holes 31 are formed on the front surface of the panel 27 provided with the second reinforcing member 28 so as to be firmly fixed to the side surfaces of the bridge beams 3 and 4 using the anchor bolts 32. It is provided to be.

The third support member 35 is provided with a third reinforcing member 33 and a third catching hole 34 connecting the second reinforcing member 33 in a direction facing the second support member 30.

The first steel bar 16 is a means for coupling the nut 36 to both ends is formed integrally with a screw portion 37 having a predetermined length.

The first steel bar 16 is the bridge beam (3) (4) by tightening the nut 36 in the state inserted into the third catching hole 34 of the third support member 35 constituting the saddle bracket (7) ) Is fixed to the side, and when the cross beam 14 is provided on the inner surface of the bridge beam (3) (4), the through hole 15 is drilled so that the first steel bar (16) is installed. It is.

The fixing bolt 10 is provided with a thread 38 having a predetermined length at both ends thereof, and then inserted into the bridge beams 3 and 4 where the work through holes 9 for lifting work are installed. After inserting the insertion hole 26 and the insertion hole 27a of the panel 27 of the first bracket 5 is provided to have a function of firmly fixing using the washer 39 and the nut 40.

The strand wire inserted into the sheath pipe 18 installed in the first catching hole 22 of the steel plate fitting bracket 50 and the second catching hole 29 of the saddle brackets 7 and 8 is tensioned and then a fixing member. It is settled at 41.

Bridge beam reinforcement method and the device according to the present invention configured as described above are as follows.

First, the degree of deflection of the bridge beam of the bridge to be reinforced is measured, and then, based on the measured value, the first catching hole 22 is interposed between the plurality of first reinforcing members 21 having a triangular shape with different lengths on the outer surface. The first and second brackets 5 and 6 having the first supporting member 23 and the insertion hole 26 and the plurality of first holes 24 formed on the front surface are formed at both ends of the steel sheet 20 having a predetermined length. Prepare the steel plate fitting bracket 50 by welding.

Next, the second support member 30 and the insertion hole 27a having the second catching hole 29 formed between the plurality of second reinforcing members 28 on one side of the panel 27 are integrally provided, A saddle bracket (7) (8) having a third reinforcing member (33) having a shape and a third supporting member (35) having a third catching hole (34) connecting the same is prepared.

Then, the support brackets 11, 12, 13 are prepared to be fixed to the lower end of the bridge beam (3) (4).

Next, the steel plate fitting bracket 50 is fixed to the outside of the bridge beams 3 and 4 by the fixing bolt 10 using the working through holes 9 to the outside bridge beams 3 and 4, and the saddle brackets 7. (8) is fixed to the inside of the bridge beam (3) (4).

Next, the steel plate fitting brackets 50 are fixed to the outside of both ends of the outer bridge beam, and the saddle brackets 7 and 8 are firmly fixed to the anchor bolts 25 and 32, respectively, inside the outer bridge beam. 14 and the first steel bar 16 for connection between the third locking hole 34 formed in the third support member 35 of the saddle bracket (7) (8) by drilling the through hole (15). Tighten with 36) to fix. Next, epoxy resin is injected into the bracket to prevent corrosion and increase adhesion.

Fix the support brackets (11) (12) (13) prepared in the middle lower end of the bridge beam (3) (4).

Bracket installation is also performed on the inner bridge beams (3) and (4). Since the horizontal beams (14) are formed on the inner bridge beams (3) and (4), the steel plate joint brackets (50) cannot be used and the saddle brackets (7). Only with (8) will the above operation.

Next, the first catching hole 22 formed in the first supporting member 23 of the steel plate fitting bracket 50 and the second catching hole 29 provided in the saddle brackets 7 and 8 via the support bracket. The sheath tube 18 is installed in the second support member 30.

Next, the strand wire 19 is inserted into the sheath tube and grease is injected for rust prevention and lubrication.

The work is completed by correcting the deflection of the bridge beams 3 and 4 by tensioning both ends of the strand 19 in the state where the strand 19 is installed.

After installing the steel plate fitting brackets 50 and the saddle brackets 7 and 8 at both ends of the adjacent bridge beams 3 and 4 and tensioning both ends of the strand 19, the deflection force is applied to the bridge beams. This acts and the tensioning force is applied to the anchor bolts of the bracket. Since the brackets are installed at both ends of the bridge beams (3) and (4), the anchor bolts (25) (32) are used less because the tension of both tensions in the bracket is canceled. As a result, damage to the bridge beam end is less likely.

In addition, after correcting the low beam of bridge beam through tensioning, if the deflection occurs after a period of time, the strand is inserted into the sheath tube and grease is injected into the sheath tube so that the strand cannot be rusted. As a result, the life of the bridge can be extended by that much.

Meanwhile, in the present invention, a steel plate fitting bracket 50 connected to the outside of the bridge beam is used. However, as illustrated in FIG. 7, saddle brackets provided on the inside of the bridge beam are disposed on the outside of the bridge beams 3 and 4, respectively. It can be installed and fastened with steel rods.

This is a saddle bracket (60) 61 fixed to the inside and the outside of the bridge beam (3) (4), and the United States fixed so as to have a predetermined distance in the outward direction from the center of both ends of the bridge beam (3) (4) A second steel bar 56 inserted into the supporting bracket and the fourth through hole 55 perforated in the cross beam 14 inside the bridge beam 3 and 4 and fixed to the saddle bracket 60; Via the third steel bar 57 fixed to the saddle bracket 61 provided on the outside of the beam (3) (4), the epoxy resin 58 injected into the saddle bracket (60) (61), and the support bracket It consists of a sheath pipe (59) installed in the saddle brackets (60, 61), and a strand not shown inserted into the sheath pipe (59).

In addition, the method for calibrating the bridge beam (3) (4) by using the saddle bracket (60), 61, saddle bracket (60) 61 and the support bracket (11) (12) (13) as described above And then fix the saddle brackets 60 and 61 to the inside and outside of the bridge beams 3 and 4 with fixing bolts 53 in the working through holes 70 installed in the bridge beams 3 and 4. And, each saddle bracket 60, 61 is fixed with an anchor bolt 62.

Fourth through holes 55 are provided in the cross beams 14 to install second steel bars 56 between the saddle brackets 60.

Next, the epoxy resin 58 is injected into the saddle brackets 60 and 61, and the sheath pipe 59 is installed in the saddle brackets 60 and 61 via the support bracket.

And it inserts in a sheath line in the sheath tube 59, and complete | finished by correcting the deflection of the bridge beams 3 and 4 by tensioning the both ends of the inserted strand.

As described above, the present invention fixes the steel plate fitting bracket and the saddle bracket to the both sides of the bridge beam constituting the continuous bridge by the fixing means, the steel rod to the saddle bracket when the bridge beam construction To secure the reinforcement work without damaging the bridge structures such as cross beams constituting the existing bridge, and installing steel plate brackets and saddle brackets on both ends of neighboring bridge beams. Or by installing steel saddle brackets at both ends of neighboring bridge beams and fastening them with steel bars, after tensioning both ends of the strand to compensate for sag, compressive force is applied to the bridge beams, while fixing to both ends of the bridge beams. Since the tension is generated at the anchor bolt of the bracket, the tension of both tensions in the bracket is canceled. Since less anchor bolts can be used to fix the bracket, there is less damage at the end of the bridge beam. In addition, since the strand is inserted in the sheath tube and grease is injected into the sheath tube, no rust occurs in the strand and the lubricity is good. Once it is corrected, it can be recalibrated to extend the bridge life.

Claims (8)

Installing steel plate fitting brackets at both ends of neighboring outer bridge beams; Respectively installing saddle brackets on both ends of the bridge beam; Installing saddle brackets on both sides of neighboring inner bridge beams, respectively; Fastening the facing saddle bracket with a steel bar; Installing a support bracket at an intermediate lower end of the bridge beam; Installing a sheath tube on the steel plate fitting bracket and the saddle bracket via the support bracket; Inserting the strand into the sheath tube; Reinforcing method of the bridge beam, characterized in that the deflection correction step by tensioning both ends of the strand. Installing saddle brackets on both sides of neighboring bridge beams, respectively; Fastening the facing saddle bracket with a steel bar; Installing a support bracket at an intermediate lower end of the bridge beam; Installing a sheath tube on the saddle bracket via the support bracket; Inserting the strand into the sheath tube; Reinforcing method of the bridge beam, characterized in that the deflection correction step by tensioning both ends of the strand. The method according to claim 1 or 2, Where the bracket is installed, the bridge beam reinforcement method characterized in that the epoxy resin is injected. The method according to claim 1 or 2, The steel bar reinforcement method of the bridge beam, characterized in that the horizontal beam is installed when the horizontal beam is installed. A steel plate fitting bracket installed at both ends of the neighboring outer bridge beams; Saddle brackets are respectively provided inside both ends of the bridge beam; Saddle brackets are provided on both sides of the neighboring inner bridge beam; A steel rod for fastening the facing saddle bracket; A support bracket installed at the middle lower end of the bridge beam; Sheath pipe installed in the steel plate fitting bracket and saddle bracket via the support bracket; A strand inserted into the sheath tube; Reinforcing device for a bridge beam, characterized in that made of a fixing member to fix the deflection by tensioning both ends of the strand. Saddle brackets are respectively provided on both sides of the adjacent bridge beam; A steel rod for fastening the facing saddle bracket; A support bracket installed at the middle lower end of the bridge beam; Sheath tube installed in the saddle bracket via the support bracket; A strand inserted into the sheath tube; Reinforcing device for a bridge beam, characterized in that made of a fixing member to fix the deflection by tensioning both ends of the strand. The method of claim 5, The steel plate fitting bracket is integrally formed by welding the first and second brackets to both ends of the steel plate, and the first and second brackets have a first support having a catching hole formed between the first and second reinforcing members facing each other in a triangular shape. Bridge beam reinforcement device. The method according to claim 5 or 6, The saddle bracket includes a second support member having a locking hole formed between a plurality of second reinforcing members and a second reinforcing member having a triangular shape on a rectangular panel, and a third supporting member supported by the third reinforcing member and having a locking hole formed therein. Bridge beam reinforcement device.