KR20010064555A - Apparatus to prevent the negative moment of a bridge and thereof method - Google Patents

Abstract

PURPOSE: A negative moment preventive device of a bridge and the construction method are provided to secure the safety of a structure by installing a negative moment preventive device to a joint of long span slabs, to reduce the damage of a bridge and to enlarge durability when external pressure such as an earthquake is applied. CONSTITUTION: A negative moment preventive device of a bridge comprises a steel wire tensioner(220) fixed to both adjacent ends of a PC beam(110) coupled to the top of a pier(100) and a PC steel wire(500') extended to the direction of pulling both ends of the PC beam by the steel wire tensioner; a bridge repair and reinforcement method comprises the steps of installing a fixing jacket(200) on both ends of the PC beam in the form of covering the PC beam, fixing a fixture to set the end of the PC steel wire to the middle of the PC beam, placing the PC steel wire over a negative moment preventive saddle(600) equipped to each fixing jacket and straining both ends of the PC steel wire by a tension gear coupled to the fixture.

Description

Parental guard for bridge and its construction {APPARATUS TO PREVENT THE NEGATIVE MOMENT OF A BRIDGE AND THEREOF METHOD}

The present invention relates to a device for preventing the parent moment of a bridge and a method thereof, and in particular, when a heavy load is applied to a vehicle load of a heavy load during construction by the multi-span continuous slab method for the safety of the bridge, the parent moment is generated in the slab continuous part. To prevent the problem of damaging the bridge and enormous obstacles to the safety of the bridge, and to prevent the fall of the bridge and the falling of the slab at the foundation, and to prevent falling of the slab. will be.

In general, bridges constructed with multiple spans by sequential spans of PC beams are constructed with multiple spans, and then, when heavy loads and vibrations are applied to the slab due to external requirements such as heavy vehicles passing, the continuum connection part As the phenomenon occurs, unsafe factors such as cracks are generated in the upper part of the bridge, which lowers the durability of the bridge and causes a problem that the safety of the bridge cannot be secured.

In addition, earthquake disasters in many countries have attracted interest in earthquake-resistant design, but existing bridges are poorly reviewed, and there is a lack of preparation for prevention of fallout when external pressure such as earthquakes occur. .

Therefore, the present invention was devised to solve and compensate for the above-mentioned problems and defects as described above, and an object of the present invention is to provide a structure for installing a parent-ment prevention device for preventing the parent-ment phenomenon in the connection portion of a long span slab. It is to provide an anti-mentor device and its construction method to ensure the safety of the bridge.

It is still another object of the present invention to provide an apparatus for preventing an anchorage of a bridge in which breakage of the bridge is reduced and durability is increased when an external pressure such as an earthquake occurs.

1 to 8 show the configuration of the bridge beam repair apparatus according to an embodiment of the present invention,

1 is a partially cutaway perspective view.

2A is a partially cutaway enlarged perspective view.

2B is a partially cut-away enlarged plan view.

3 is a perspective view of a fixing bracket.

4 is a cross-sectional view taken along the line A-A of FIG.

Figure 5 is a front view showing a PC beam re-tensioning PC strands on the second saddle and the PC strands for preventing the anti-mentum is fixed.

6 is a cross-sectional view taken along the line B-B in FIG.

7 is a front view showing a form in which the PC strand for PC beam re-tension is spread over the first saddle.

8 is a perspective view of the parental preventing birds.

9 and 10 are a perspective view and a plan view showing the configuration of the bridge beam repair apparatus according to another embodiment of the present invention.

11 to 15 show the configuration of the bridge beam repair apparatus according to another embodiment of the present invention,

11 is a partially cutaway perspective view.

12 is a partially cutaway enlarged perspective view.

13 is a partially cut-out enlarged plan view.

14 is a cross-sectional view taken along the line C-C in FIG.

Figure 15 is a front view showing the form of the PC strand tension PC strand for straining simple saddle on both ends.

16 and 17 are a partially cutaway perspective view and a plan view of a bridge beam repair apparatus according to another embodiment of the present invention.

<Description of the reference numerals for the main parts of the drawings>

100: pier 110: PC beam

110a: free portion 112: rebar

112a: vertical part 112b: horizontal part

200: settling jacket 201: side plate

202: lower plate 203: upper plate

203b: fixing hole 210: fixing bracket

220: strand extension means 320: second saddle

321: side plate 400: anchorage

500 ': PC strand 510: sheath tube

600: saddle prevention saddle 601: fixed plate

601a: fixing hole 602: information board

603: guide support groove 603a: horizontal portion

603b: inclined portion 604: reinforcement plate

In order to achieve the above object, the apparatus for preventing parental tension of a bridge according to the present invention includes a strand extension means fixed to both ends of adjacent PC beams coupled to an upper portion of the bridge, and the strand beam tensioning means of the PC beam by the strand extension means. It includes a PC strand that is tensioned to the side pulled from both ends is configured to prevent the parent of the PC beam and to prevent falling.

For example, the strand tensioning means is fixed to both side plates of the fixing jacket which is fixed to both ends of the PC beam, respectively, to prevent the anti-mention birds are fixed to the PC strands, and the second saddle is fixed to the fixing bracket Each fixing bracket is fixed, and fixing fixtures for fixing both ends of the PC strand are fixed.

The anti-cement saddle is formed with a guide support groove formed by welding a guide plate to an upper end of a fixed plate fixed to the side plate of the fixing jacket at both ends, and a plurality of reinforcement plates are welded to a side surface of the fixed plate. Is formed in a shape having an inclined portion, the fixing plate is formed by forming a plurality of fixing holes for anchoring.

In addition, the anticement saddle is disposed on the upper side of the inner side of the side plate of the fixing jacket, the anticement fixing bracket is located at a distance in the longitudinal direction and the width direction relative to the anticement prevention birds in the lower portion It is arranged on the side plate of the second saddle to be positioned so that the PC strands across the anti-mental saddle and the fixing bracket is inclined downward.

As another example of the strand extension means, fixing anchoring brackets for preventing the anti-mention are directly fixed to side plates of the fixing jacket fixed to both ends of the PC beam, and end portions of the PC stranding wire are fixed to the fixing holes fixed to both fixing brackets. It is configured to tension directly.

According to the present invention, there is provided a method for preventing the parental cement of a bridge in which a fixing jacket is formed in the form of surrounding the PC beam at both ends of the PC beam, and fixing the fixing tool for fixing the end of the PC strand in the middle of the PC beam. And placing a PC strand on the anti-mention saddles provided in each of the fixing jackets, and tensioning both ends of the PC strands with a tensioning device coupled to the fixing unit. It is also configured to prevent stigma.

One construction of the construction method of the present invention is formed together with the anti-mention birds on the side plate of the fixing jacket, and forming a fixing bracket on the side plate of the second birds, the fixing jacket and the second birds to the PC Installing the beam in the beam, installing the anchorage in the fixing bracket of the second birds, and hanging the PC strand on the saddle preventing saddle of the anchoring jacket and fixing both ends of the PC strand in the anchorage of the fixing bracket. And tensioning both ends of the PC strand with a tensioning device connected to the anchorage of the anchoring bracket.

Other construction forms include the steps of forming a fixing bracket for preventing the anti-mention in the fixing jacket, fixing the fixing jacket at both ends of the PC beam, coupling the fixing holes to the fixing brackets on both ends, respectively; Coupling both ends of the strand to both anchors, and tensioning both ends of the PC strand to the tensioner coupled to the anchor.

The method of the present invention more specifically includes cutting and crushing the slab of the pier part of the PC beam to expose the beam upper reinforcement, cutting the required number of horizontal portions of the exposed reinforcing bars, and an upper surface of the PC beam. Coupling the upper plate to the plurality of fixing holes so that the vertical part of the reinforcing bar is inserted, and fixing both sides of the side plate with fixing brackets on the left and right sides of the PC beam by anchoring the upper plate and both sides Welding and fixing the plate, installing a lower plate on the lower surface of the PC beam, welding the both side plates, and fixing the plate into a shape of “ㅁ”, and fixing the PC strand, and then fixing the PC beam. Welding and connecting the reinforcing bars to the upper reinforcing bars, and welding the upper slab reinforcing bars, and epoxy putty work around the top plate, both side plates and the bottom plate of the fixing jacket. Injecting the poetry, Installing the formwork below the upper slab cut portion of the PC beam, Applying the old and new concrete adhesive to the crushing part to pour concrete, curing and asphalt pavement, and the epoxy has a certain strength After the hardening, the step of installing the hydraulic jack for tension, and the end of each of the PC strands exposed to the outside of the anchorage coupled to the fixing bracket by holding the tensioning device at the same time to fix and apply pressure to both ends of the PC strands Tensioning the bi-directionally outside of the PC beam, injecting antirust grease into the sheath tube of the PC strand, cutting the PC strand into lengths capable of retensioning, and installing a protective cap to protect the beam And the step of applying an epoxy paint to the entire reinforcement part to perform antirust treatment and finishing.

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

1 to 8 show the configuration of a bridge beam repairing apparatus according to an embodiment of the present invention, FIG. 1 is a partially cutaway perspective view, FIG. 2A is a partially cutaway enlarged perspective view, FIG. 2B is a partially cutaway enlarged plan view, and FIG. The anchoring brackets are shown respectively, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 5 is a front view showing a PC beam retensioning PC strand connected to the second saddle and a PC strand for preventing anti-mention being fixed. 6 is a sectional view taken along line BB of FIG. 1, and FIG. 7 is a front view showing a PC beam retightening line extending to the first saddle, respectively, and FIG. 8 is a perspective view of the anti-parental birds. have.

In these drawings, reference numeral 100 denotes a pier, 110 denotes a PC beam, 200 denotes a fixing jacket, and a bridge device 130 is installed at an upper end of the plurality of bridges 100, and the bridge device 130. A plurality of PC beams 110 are continuously joined to each other, and fixing jackets 200 are fixedly installed at both ends of the PC beam 110 in the longitudinal direction, respectively, and fixing brackets 210 are installed at each fixing jacket 200. Is provided.

In addition, reference numeral 220 shows a strand extension means that is a main portion of the present invention, the strand extension means 220 is provided on both ends of the adjacent PC beam 110 coupled to the upper portion of the bridge 100, the PC The PC strand 500 'stretched to both sides of the beam 110 to be pulled from each other is configured to be fixed by the strand extension means 220.

A plurality of steel intermediate saddles 300: 310 and 320 are fixedly installed at predetermined intervals in the middle lower portion of the PC beam 110, and a fixing unit 400 is provided in the left and right fixing brackets 210 of the fixing jacket 200. It is fixed, and both ends of the PC strand 500 is supported by the fixing member 400, the intermediate portion is supported by the steel intermediate saddle (300: 310, 320) is fixed in a tension state.

For example, the strand extension means 220 is fixed to the both sides of the side plate 201 of each fixing jacket 200 is fixed to both ends of the PC beam 110, respectively, the anti-mental saddle 600 is fixed to the PC A strand 500 'is spanned, and fixing brackets 210 are fixed to the second saddle 320, respectively, and fixing the both ends by tensioning the PC strand 500' to each fixing bracket 210. Fixture 400 for is configured to be fixed.

The anti-mention saddle 600 is a guide plate 602 is welded to the upper end of the fixing plate 601 is fixed to the side plate 201 of the fixing jacket 200 of the both ends is formed with a guide support groove 603 A plurality of reinforcing plate 604 is welded to the side surface of the fixing plate 601, the guide support groove 603 is formed in a shape having a horizontal portion 603a and the inclined portion 603b, the fixing plate 601 A plurality of fixing holes (601a) for driving the anchor 150 is formed is configured.

2A and 2B, the fixing jacket 200 includes side plates 201 coupled to the left and right sides of the PC beam 110, a lower plate 202 coupled to the lower surface, and an upper plate coupled to the upper surface. It is formed of 203 and is fixed in a form surrounding the PC beam (110).

The upper and lower plates 203 and 202 have the fastening portions 203a and 204a integrally bent at both ends, so that the fastening portions 203a and 204a are formed at the upper and lower ends of both side plates 201. By overlapping and welding, the upper and lower plates 203 and 202 and both side plates 201 form a fixing jacket 200 of a unitary body.

A plurality of fixing holes 203b are formed in the top plate 203 of the fixing jacket 200 to insert and couple the vertical portion 112a of the reinforcing bar 112 protruding to the top surface 111 of the PC beam 110. As a result, the top plate 203 is firmly fixed to the vertical portion 112a of the reinforcing bar 112.

When the upper surface portion 111 of the PC beam 110 is cut to a predetermined thickness, a plurality of reinforcing bars 112 already embedded when the PC beam 110 is manufactured are exposed, and the horizontal portion 112b of each of the reinforcing bars 112 is exposed. ), The vertical part 112a is left after cutting, thereby fixing the upper plate 203 as above using the vertical part 112a.

A plurality of fixing holes 201a are formed in both side plates 201, and fixing holes 111a corresponding to the left and right sides of the PC beam 110 are formed to communicate with each other. In addition, the anchor 150 is fixed to the upper and lower surfaces of the upper and lower plates 203 and 202, and the upper and lower portions of the side plates 201 and the connecting parts 203a and 204a of the side plate 201 are similarly applied. By fixing the anchor 150, both side plates 201 and the upper and lower plates 203 and 202 are firmly fixed by the vertical portions 112a, the anchors 150 and the welding of the reinforcing bars 112.

As shown in FIGS. 1 and 2A and 8B, a non-contraction mortar layer 140 is poured between end portions of the adjacent PC beams 110.

As shown in FIGS. 1, 6, and 7, the first saddle 310 of the steel intermediate saddles 300: 310 and 320 may be disposed on the side plates 311 and the bottom surface of the steel intermediate saddles 300, 310, and 320. The fixed bottom plate 312 is welded and fixed, and guide plates 313 are fixed to lower ends of both side plates 311 to form guide support grooves 314 and a plurality of reinforcement plates 315 are welded. The plurality of anchors 150 are fixed to the PC beam 110.

As shown in FIGS. 1, 4, and 5, the second saddle 320 of the steel intermediate saddles 300: 310 and 320 includes side plates 321 fixed to left and right sides of the PC beam 110, and a lower surface thereof. The lower plate 322 is fixed to the welding is fixed, the guide plate 323 is welded to both side edges of the lower plate 322 to form a guide support groove 324 and a plurality of reinforcement plate 325 is welded It is fixed to the PC beam 110 by a plurality of anchors (150).

The epoxy concrete 120 is filled between the side plate 321 of the second saddle 320 and the concave portion 113 of the PC beam 110 to achieve a stronger bond.

The fixing brackets 210 fixed to the left and right sides of the fixing jacket 200 are horizontal members coupled to both side members 211 and both sides of the side plate 201 as shown in FIGS. 2 and 3. 212 and the reinforcing member 213 are welded, and the horizontal member 212 is formed with a fixing hole 214 to which the fixing unit 400 is fixed.

The PC strand 500 is composed of a plurality of strands, for example, D12.7mm 7 strand strand 501 is covered with a sheath tube 510, the inside of the sheath tube 510 is a lubricant such as grease Can be injected and used.

Wherein the PC strand 500 is inserted into the guide support grooves 314, 324 of the steel intermediate saddle (300: 310, 320) is inserted into the slip guide pipe 520 is coupled to the PC strand 500 is smooth to slip It is to be able to move.

For example, a stainless pipe is used for the slip guide tube 520. In addition, the inner slip guide tube 522 is formed longer than the outer slip guide tube 521 and protrudes as much as the margin along the flow to both sides of the outer slip guide tube 521.

The anchorage preventing fixing bracket 210 is formed on the side plate 321 of the second saddle 320 in the same configuration as the fixing bracket 210 for re-tension as shown in FIG. 3. That is, instead of the side plate 201 of the fixing jacket 200, the side plate 321 of the second saddle 320 is formed in the same shape.

The anti-cement saddle 600 and the anti-cement fixing bracket 210 may be made of the side plate 201 and the first side of the fixing jacket 200 in consideration of the simplicity of manufacturing and construction work, the anti-cement force, mechanical strength, and the like. The side plates 321 of the two saddle 320 are preferably formed together, but may be installed independently at different positions.

In the form in which the anti-mention saddle 600 and the fixing bracket 210 are installed together on the side plate 201 of the fixing jacket 200 and the side plate 321 of the second saddle 320, FIGS. Likewise, the parental saddle preventing saddle 600 is disposed on the upper side of the inner side of the side plate 201 of the fixing jacket 200, the parental thread preventing fixing bracket 210 is based on the saddle preventing member 600 for parental The PC strand 500 'that is disposed on the side plate 321 of the second saddle 320 at a distance in the longitudinal direction and in the width direction and spans the anti-mention saddle 600 and the fixing bracket 210. It is installed to incline downward.

In addition, the reinforcement support plate 330 is disposed on the lower side of the side plate 321 of the second saddle 320 to reinforce the parental prevention device as shown in FIG. 5 to the anchor 150 on the PC beam 110. Fix it.

On the other hand, the construction method for the construction of the anti-mention device of the bridge of the present invention comprises the step of installing the fixing jacket 200 in the form of wrapping the PC beam 110 on both ends of the PC beam 110, and the PC beam ( Fixing the fixing unit 400 for fixing the end of the PC strand 500 'in the middle of the 110, and the PC stranded wire (a) in the anti-mention saddle 600 provided in each of the fixing jacket (200) 500 ') and tensioning both ends of the PC strand 500' with a tension device coupled to the anchorage 400.

As a more specific example, the anti-cement saddle 600 is formed together on the side plate 201 of the fixing jacket 200, and the fixing bracket 210 is formed on the side plate 321 of the second saddle 320. ) To form the fixing jacket 200 and the second saddle 320 on the PC beam 110, and the fixing unit 400 in the fixing bracket 210 of the second saddle 320 ) And the PC strand 500 'to the saddle prevention saddle 600 of the fixing jacket 200, and the PC strand 500' to the fixing unit 400 of the fixing bracket 210. And fixing both ends, and tensioning both ends of the PC strand 500 'with a tensioning device connected to the fixing unit 400 of the fixing bracket 210.

Hereinafter, a suitable construction example of the present invention as described above will be described.

In one embodiment of the present invention, as shown in FIGS. 1 and 2, the slab of the pier portion of the PC beam 110 is cut and then crushed to expose the beam upper reinforcing bars 112.

Thereafter, the horizontal portion 112b of the exposed rebar 112 is cut as many times as necessary.

Thereafter, the upper plate 203 is coupled to the upper surface of the PC beam 110 so that the vertical portions 112a of the reinforcing bars 112 are inserted into the plurality of fixing holes 203b.

Subsequently, the two side plates 201 having the fixing brackets 210 are coupled to the left and right sides of the PC beam 110 to be fixed by the anchors 150, and the top plate 203 and the both side plates 201 are welded. do.

After that, the lower surface plate 202 is installed on the lower surface of the PC beam 110 and welded to both side plates 201 to fix the shape of ". &Quot;

In addition, the fixing brackets 210 of the fixing jacket 200 are coupled to the fixing unit 400, and the first saddle 310 of the steel intermediate saddles 300: 310 and 320 in the middle of the left and right sides of the PC beam 110. The second saddle 320 is fixed to both sides of the first saddle 310, respectively.

As described above, when the fixing jacket 200 having the fixing bracket 210 and the construction of the steel intermediate saddles 300: 310 and 320 are completed, the first saddle 310 and the first saddle 310 of the steel intermediate saddles 300: 310 and 320 are completed. 2 After combining the inner and outer slip guide tubes 522 and 521 to the saddle 600 for preventing the cement of the saddle 320 and the fixing jacket 200, the PC strand 500 and the PC strand 500 ' Insert the intermediate part and fix it.

Subsequently, the reinforcing bar is welded to the reinforcing bar 112 on the upper portion of the PC beam 110, and the upper slab reinforcing bar is welded.

Subsequently, epoxy putty work is performed around the top plate 203, both side plates 201, and the bottom plate 202 of the fixing jacket 200, and epoxy is injected.

After that, the formwork is installed under the upper slab cut part, the old and new concrete adhesive is applied to the crushing part, and then the concrete is poured to cure and asphalt pavement.

When the epoxy is hardened to a certain strength or more, a tensioning hydraulic jack is installed on the fixing bracket 210 of the fixing jacket 200 and the fixing bracket 210 of the second saddle 320.

Thereafter, the ends of the PC strands 500 and PC strands 500 'exposed to the outside of the fixing unit 400 are simultaneously grasped and fixed by a tensioning device and applied to the structural review required strength pressure, and the PC strands 500 and the PC strands ( By pulling both ends of the 500 'side to the outside in both directions at once, the PC beam 110, which was in the lowered state, was corrected to the horizontal state, and the occurrence of the parent moment was prevented, and the sheath tube 510 of the PC strand 500 was removed. Inject antirust grease into the inside of the PC and cut the PC strand 500 into a length that can be retensioned, and then install a protective cap to take protective measures.

Subsequently, epoxy paint is applied to the entire reinforcement part to prevent rust and finish.

As shown above, the PC strands 500 'are fastened to the anti-mention saddles 600 and 600 installed at both ends of the PC beam 110 adjacent to each other, and the fixing holes of the fixing bracket 210 installed at a distance in an inclined direction ( While pulling the both ends of the PC strand (500 ') by using the 400, both ends of the adjacent PC beam 110 is pulled together to act as a resistance against the parent moment while receiving a compressive force is the parent of the PC beam 110 In addition, since both ends of the PC beam 110 adjacent to each other is pulled by the PC strand (500 ′) for preventing the parent cement to have a binding force, the left and right flow of the PC beam 110 is prevented, and external factors such as earthquakes are prevented. Falling of the slab caused by the effect is prevented and durability is increased.

9 and 10 are a perspective view and a plan view showing the configuration of the device for preventing the anti-mention of the bridge according to another embodiment of the present invention, the embodiment of the fixing jacket 200 wraps up to the edge of the end of the PC beam 110 Although installed in the form, in this other embodiment is configured to install a fixing jacket 200 leaving a spare portion 110a of a predetermined width from the end of the PC beam 110, according to one embodiment of the The fixing jacket 200 is formed to have a wide width with respect to the inner side thereof, and the fixing jacket 200 of another embodiment is formed to have a short width based on the inner side thereof.

In addition, the fixing jacket 200 of one embodiment is provided with a lower plate 202 on the bridge device 130 is installed between the pier 100 and the PC beam 110, the fixing jacket 200 of another embodiment The lower surface plate 202 is provided in the side part of the chair apparatus 130, and is comprised.

11 to 16 illustrate a structure of a bridge beam repairing apparatus according to still another embodiment of the present invention. FIG. 11 is a partially cutaway perspective view, FIG. 12 is a partially cutaway enlarged perspective view, and FIG. 13 is a partially cutaway enlarged plan view, respectively. FIG. 14 is a cross-sectional view taken along line CC of FIG. 11, and FIG. 15 is a front view showing a form in which PC strands for tensioning a PC beam are stretched on both ends of a simple saddle.

Bridge anti-mentorship device according to another embodiment of the present invention shown in this to the fixing of the anti-mention bracket 210 to the side plate 201 of the fixing jacket 200 is fixed to both ends of the PC beam (110). It is configured to directly fix and directly tension the end of the PC strand 500 (500 ') to the fixing unit 400 fixed to both fixing brackets 210 to prevent the parent of the adjacent PC beam 110.

Therefore, although the fixing bracket 210 is formed in the second saddle 320 of FIG. 5 to fix the fixing unit 400 for tensioning the PC strand 500 ', the fixing saddle 210 is formed here. As the fixing saddle 210 does not need to be provided in the second saddle 320, the second saddle 320 is formed in a simple shape.

The method for preventing the parental cement of the bridge of the present invention to which the other embodiment is applied includes the steps of forming the fixing bracket 210 for preventing the parental cement on the fixing jacket 200 and fixing jackets at both ends of the PC beam 110. Fixing 200, coupling the anchorage 400 to each of the anchoring brackets 210, and coupling both ends of the PC strand 500 'to both anchorages 400; And tensioning both ends of the PC strand 500 'with a tensioning device coupled to the anchorage 400.

11 to 15 illustrate the parent of the PC beam 110 by fixing both ends of the PC strand 500 'to the fixing bracket 210 installed at both ends of the PC beam 110 adjacent to each other. In addition to preventing the flow and falling of the PC beam 110, such as the construction work is simpler, it can be used more conveniently when only the construction of the parental prevention device independently. Of course, the fixing bracket 210 of the parental prevention device is preferably installed in the fixing jacket 200, it may be fixed directly to the PC beam 110 or may be installed in other forms.

16 and 17 are a partially cutaway perspective view and a plan view of a bridge beam repair apparatus according to another embodiment of the present invention, which is the embodiment of FIGS. 11 to 15, and FIGS. 9 and 10. As an embodiment combining the embodiments, the fixing jacket 200 is installed while leaving the marginal portion 110a by a predetermined width from the end of the PC beam 110, while being fixed to both ends of the PC beam 110. Directly fixing the fixing brackets 210 for preventing the anti-mention to the side plate 201 of the fixing jacket 200, and the end of the PC strand 500 'to the fixing unit 400 fixed to both fixing brackets 210 It is configured to prevent the parent of the adjacent PC beam 110 by fixing and directly tensioning each other.

Other configurations and functions of the embodiment shown in FIGS. 16 and 17 are similar to those of FIGS. 11 to 15 and those of FIGS. 9 and 10.

As described above, the present invention is a multi-span continuous slab method for the safety of the bridge, when a high load is applied to the vehicle traffic, such as heavy load during construction, the parent moment is generated in the slab continuity to damage the bridge and It can prevent the problem of enormous safety and reduce the maintenance and repair cost due to the damage of the bridge due to the parent. The parental prevention device is constructed in connection with the PC beam re-tensioning method using the fixing jacket. If the construction can be done without a separate hypothesis is effective in reducing the cost. In addition, by acting as a link between the slab and the slab to prevent damage to the piers and sinking of the slab at the foundation of the foundation due to external factors such as earthquakes, it is effective in the earthquake preparedness.

The present invention described above can be applied to various bridge types such as truss bridge, T beam bridge, I beam bridge, PC beam bridge, slab bridge, Guerba bridge, ramen bridge, and steel plate bridge.

Claims (10)

Both ends of the PC beam 110 are secured by the strand extension means 220 fixed to both ends of the adjacent PC beam 110 coupled to the upper portion of the bridge 100 and the strand extension means 220. Device for preventing the moment of the bridge comprising a PC strand (500 ') which is pulled toward the pulled side to prevent the parenting of the PC beam (110) and to prevent falling. The method of claim 1, wherein the strand tension means 220 is a saddle prevention saddle 600 is fixed to each side plate 201 of each fixing jacket 200 is fixed to both ends of the PC beam 110, respectively The PC strand 500 'is spread over, and the fixing brackets 210 are fixed to the second saddle 320, respectively, and the PC strand 500' is tensioned at each fixing bracket 210. The anchorage prevention device of the bridge, characterized in that the fixing fixture 400 for fixing is configured. The guide plate 602 is welded to the upper end of the fixing plate 601 which is fixed to the side plate 201 of the fixing jacket 200 at both ends. 603 is formed and a plurality of reinforcing plates 604 are welded to the side surfaces of the fixed plate 601, the guide support groove 603 is formed in a shape having a horizontal portion (603a) and inclined portion (603b), The fixing plate 601 bridges the parent moment prevention device, characterized in that formed a plurality of fixing holes (601a) for driving the anchor 150 is formed. According to claim 2, wherein the anti-cement saddle 600 is disposed on the upper side of the inner side of the side plate 201 of the fixing jacket 200, the anti-cement fixing bracket 210 is the parent It is disposed on the side plate 321 of the second saddle 320 with a distance in the longitudinal direction and the width direction relative to the prevention saddle 600, and the anti-cement saddle 600 and the fixing bracket ( PC stranded wire (500 ') spans 210 is characterized in that the parent moment prevention device of the bridge, characterized in that configured to be inclined downward. According to claim 1, wherein the strand extension means 220 is fixed to the anchor plate bracket for preventing the anti-mention 210 is directly fixed to the side plate 201 of the fixing jacket 200 is fixed to both ends of the PC beam (110) , The end of the PC strand (500 ') is fixed to the fixing unit 400 is fixed to both fixing brackets 210 is fixed to the tension of the bridge, characterized in that configured to be directly tensioned. According to claim 1, wherein the fixing jacket 200 is installed leaving a marginal portion (110a) of a predetermined width from the end of the PC beam 110, the fixing is fixed to both ends of the PC beam (110) Fixing bracket 210 for preventing the anti-mention is directly fixed to the side plate 201 of the jacket 200, the end of the PC strand 500 'to the fixing unit 400 is fixed to both fixing brackets 210 The device for preventing the parent moment of the bridge, characterized in that the configuration is fixed directly. Installing the fixing jacket 200 in the form of wrapping the PC beam 110 on both ends of the PC beam 110, and fixing the end of the PC strand 500 'in the middle portion of the PC beam 110 Fixing the fixing unit 400, and hanging the PC strand 500 'to the anti-mention saddle 600 provided in each of the fixing jacket 200 and the both ends of the PC strand 500' Method of preventing the parental cement of the bridge, characterized in that to prevent the parent moment of the PC beam (110) as well as to prevent falling by including a tensioning device coupled to the 400. The method of claim 7, wherein the side plate 201 of the fixing jacket 200 to form a saddle prevention saddle 600 together, the fixing bracket 210 on the side plate 321 of the second saddle 320 ) To form the fixing jacket 200 and the second saddle 320 on the PC beam 110, and the fixing unit 400 in the fixing bracket 210 of the second saddle 320 ) And the PC strand 500 'to the saddle prevention saddle 600 of the fixing jacket 200, and the PC strand 500' to the fixing unit 400 of the fixing bracket 210. Securing both ends of the PC beam 110 by tensioning both ends of the PC strand 500 'with a tensioning device connected to the fixing unit 400 of the fixing bracket 210. The method of preventing the moment of bridges, characterized in that to prevent, and to prevent left and right flow and falling. 8. The method of claim 7, further comprising the steps of forming a fixing bracket (210) for preventing a parent in the fixing jacket (200), fixing the fixing jacket (200) at both ends of the PC beam (110), Coupling each of the fixing holes 400 to the fixing bracket 210, coupling both ends of the PC strand 500 'to both fixing units 400, and both ends of the PC strand 500'. The method of preventing the tension of the bridge, characterized in that to prevent the fall of the parent moment of the PC beam (110), including the step of tensioning with a tension device coupled to the fixing unit (400). 10. The method according to claim 8 or 9, wherein the slab of the pier of the PC beam 110 is cut and broken to expose the beam upper reinforcing bars 112, and the horizontal portion 112b of the exposed reinforcing bars 112. Cutting the required number of times, and coupling the upper surface plate 203 to the upper surface portion of the PC beam 110 so that the vertical portion 112a of the reinforcing rod 112 is inserted into its plurality of fixing holes 203b. And the two side plates 201 having the fixing brackets 210 mounted on the left and right sides of the PC beam 110 and fixed with anchors 150 and the top plate 203 and both side plates 201. Welding) and fixing the lower surface plate 202 on the lower surface of the PC beam 110 and welding the both side plates 201 to fix the shape of the shape of "ㅁ". After fixing the strand 500 ', connecting the reinforcing bars to the reinforcing bars 112 of the upper portion of the PC beam 110, and welding the upper slab reinforcement bars, and Performing epoxy putty work and injecting epoxy around the top plate 203, both side plates 201 and the bottom plate 202 of the fixing jacket 200, and the lower part of the upper slab cut of the PC beam 110; Installing a formwork on it, applying the old and new concrete adhesive to the crushing part, placing concrete, curing and asphalt paving, and installing the hydraulic jack for tensioning after the epoxy is hardened to a certain strength or more; The ends of each PC strand 500 'exposed to the outside of the fixing unit 400 coupled to the fixing bracket 210 are simultaneously grasped and fixed with a tensioning device, and the pressure is applied to both ends of the PC strand 500'. Tensioning outwards in both directions of the 110, injecting anti-rust grease into the sheath pipe 510 of the PC strand 500 ', and retightening the PC strand 500'. Cutting with a protective cap The protection step and the rust-preventive treatment by applying an epoxy paint to the reinforcement and to prevent the entire part of the parent bridge cement, characterized in that configured by including the step of finishing method which.