KR20060111215A - Expansion joint for highways, bridges and the like and assembling method for use the same - Google Patents

Abstract

An expansion joint for a bridge and an assembling method thereof are provided to shorten a period of construction and traffic control by assembling and disassembling components of an expansion joint easily for replacement work, to economize in resources and the cost required for maintenance by replacing the damaged or deteriorated component of the expansion joint only, and to prevent the corrosion of a bridge bearing between a pier and a bridge slab and to protect vehicles and pedestrians passing below a bridge by having high waterproofing efficiency. An expansion joint for a bridge comprises: a pair of support blocks(30) coupled to the end of two adjacent floor slabs(10) of a bridge by a fastener(40) and provided with anchor holes(32) and nuts(34); a waterproofing elastic member(60) located in a gap between support blocks and the top of each support block and composed of a body(62) and wings(64) to have a T-shaped cross section; and a pair of cover blocks(50) coupled on the top of the support blocks by coupling bolts(70) to nuts of the support blocks via bolt holes(52) and provided with fingers(80) to engage with each other and to form a gap(90). An assembling method of the expansion joint for the bridge comprises the steps of: placing a pair of support blocks provided with anchor holes and nuts on the ends of two adjacent bridge slabs, and perforating the top of the bridge slab correspondingly to the anchor holes of the support blocks using a drilling machine; coupling a fastener such as chemical anchors to the bridge slab via the anchor holes of the support blocks; inserting the body of a waterproofing elastic member which is formed to have a T-shaped cross section by forming a pair of wings on both sides of a body into a gap between a pair of support blocks, and locating the wings of the waterproofing elastic member to the top of each support block; and placing a pair of cover blocks on the top of the support blocks and the waterproofing elastic member to make bolt holes corresponded to the nuts of the support blocks, and assembling bolts to the nuts of the support blocks via the bolt holes of the cover blocks and making fingers engaged with each other at the same time.

Description

Expansion joint for highways, bridges and the like and assembling method for use the same}

1 is a perspective view showing the structure of a conventional stretch joint for a bridge.

Figure 2 is a perspective view showing a flexible joint for bridges according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing a flexible joint for bridges in accordance with one embodiment of the present invention.

Figure 4 is a flow chart for the prefabricated construction method of the expansion joint for bridges according to an embodiment of the present invention.

Figure 5 is a flow chart for the prefabricated method of the expansion joint for bridges in accordance with another preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: bridge deck 30: support block

50: cover block 60: elastic member for waterproofing

80: finger portion

The present invention relates to a prefabricated method, and more particularly to a stretch joint for bridges and a prefabricated method thereof.

Bridge stretching joints according to the prior art include rubber expansion joints, steel expansion joints and the like.

The rubber-based expansion joint according to the prior art is excellent in flatness to improve the riding comfort of the vehicle passing through the bridge, but there is a problem that it needs to be replaced regularly because it is easily worn. In addition, in order to fix the rubber expansion joint to the upper plate of the bridge, it is necessary to pour and harden the after-treatment materials such as superhard mortar, so that it takes a lot of time when the first construction or replacement work, and frequent replacement work is required. There is a problem that a maintenance cost is required.

The steel expansion joint according to the prior art has the advantage of long life and easy adjustment of the expansion joint of the expansion joint due to the characteristics of the material. The disadvantage is that it takes.

Referring to the steel expansion joint according to the prior art with reference to Figure 1, to anchor the anchor plate body 210 to the reinforcing structure 220 in order to firmly secure the expansion joint 200 and pouring the futajae 230 Therefore, the replacement work is required to cut the anchor plate body 210 or the reinforcing structure 220 and crush the futajae 230, it takes a lot of time and money for the replacement work, through the bridge during the construction period Because of the need to control traffic, social costs were also wasted.

On the other hand, under the bridge or overpass, there are usually many other roads and passageways, and many bridges that use steel bridges are used to protect vehicles, pedestrians, and bridges that pass under the bridge. The waterproof function of the expansion joint is necessary. Therefore, a waterproof elastic member is used for the expansion joint, and the elastic member is often aged in a short time due to frequent stretching and contraction, solar heat and rain, etc., so that it is often required to replace the other members. However, in the case of the conventional stretch joint for roads, the entire stretch joint needs to be dismantled in order to replace the waterproof elastic member, which requires much manpower, resources, and time to maintain and repair the stretch joint.

Conventional techniques related to the expansion joints for bridges include, firstly, Republic of Korea Utility Model Publication No. 0127673 ('Road Bridge Construction Joints'). However, the above invention is to form the anchor plate body to fix the left and right support plates in concrete, and is not constructed by a prefabricated method, there is a problem that the joint part must be broken during repair and replacement.

Second, Korea Registered Utility Model Publication No. 20-0222321 ('Bridge Construction Joint'). However, the present invention is to absorb all of the vibration even if the amplitude is large, such as an earthquake, it is not constructed by the prefabricated method, there is a problem that the repair, replacement is not easy.

Third, Korean Laid-Open Patent Publication No. 2002-0004267 ('Upper Structure of PC Beam and Bridge and Forming Method thereof'). However, the present invention is to separately install the non-concrete concrete portion to facilitate the repair of the expansion joint portion, because it is not a prefabricated method like the above devises, the process of crushing concrete to replace the expansion joint is required, fastening There is a problem that it is not a method that can be easily repaired and replaced by simply dismantling the old bolts.

According to the present invention, by easily disassembling and assembling the components of the expansion joint, it is possible to shorten the replacement period in case of aging of the waterproof elastic member or breakage of the expansion joint to shorten the construction period and the traffic control time, and the parts of the expansion joint. When damaged or aged, it is possible to easily replace only the corresponding parts, saving resources and cost for maintenance and repair, and new expansion joints for bridges that prevent corrosion of the teaching device due to its excellent waterproof performance. It is to provide a prefabricated method.

According to one aspect of the invention, a pair of support blocks that are detachably coupled to the ends of two adjacent top plates of the bridge, respectively, and detachably coupled to the upper portion of the pair of support blocks, respectively, the finger portion on one side A T-shaped cross section having a pair of cover blocks formed and interdigitated with each other, a wing portion interposed between the pair of support blocks and the pair of cover blocks, and a body portion interposed between the pair of support blocks. Including a waterproof elastic member having a waterproof elastic member is provided for the bridge expansion joint is interposed so as to be replaced when the pair of cover blocks separated from the pair of support blocks.

The pair of support blocks may be respectively coupled to the two top plates by bolts. At least one nut part is formed in each of the pair of support blocks, and at least one bolt hole is formed in the pair of cover blocks corresponding to the nut part, and the pair of cover blocks are assembled to the nut part through the bolt holes. It can be coupled to a pair of support blocks by the above bolts.

The finger portion preferably has a tapered cross section whose thickness decreases toward the end portion. An elastic joint filler may be interposed between the finger parts. One or more through holes may be formed in the wing.

In addition, (a) arranging a pair of support blocks formed with an anchor hole and a nut portion at each end of two adjacent upper plates of the bridge, and drilling a portion corresponding to the anchor hole of the upper plate, (b) a chemical anchor in the anchor hole Coupling the pair of support blocks to the upper plate to be detachably coupled to each other; (c) a pair of wings are formed at both sides of the body to form a T-shaped waterproof elastic member having a pair of wings; Contacting the upper surface of the support block, respectively, and installing the body part so as to be interposed between the pair of support blocks, and (d) a pair of cover blocks in which the bolt holes are formed so that the bolt holes correspond to the nut parts of the pair of support blocks; Disposed in each, and detachably coupling the pair of cover blocks to the pair of support blocks by bolts assembled to the nut part through the bolt holes, wherein each side of the pair of cover blocks is a ping. denial Forming and finger portions are provided with a prefabricated construction method of the bridge expansion joint for summing values from each other.

Before step (a) may further comprise the step of demolishing the existing joint by crushing the futajae of the existing joint formed on the ends of the two top plate.

In addition, a pair of support blocks are detachably coupled to each other by constructing chemical anchors at the ends of two adjacent upper plates of the bridge, and are detachably coupled to each other by fastening bolts to the upper portions of the pair of support blocks. T-shape with a pair of cover blocks formed with a finger portion and interdigitated with each other, a wing portion interposed between the pair of support blocks and the pair of cover blocks, and a body portion interposed between the pair of support blocks. In the construction method for repairing a bridge expansion joint including a waterproof elastic member having a cross-section of the waterproof elastic member interposed so as to be replaced when the pair of cover blocks separated from the pair of support blocks, (a) bolts Dismantling and separating the pair of cover blocks from the pair of support blocks, (b) removing the waterproof elastic member and replacing it with a new waterproof elastic member. It is the phase, and (c) of the bridge expansion joint for prefabricated construction method to combine the cover block of the pair and a pair of supporting blocks of and including the step of fastening the bolt is provided.

The pair of support blocks and the pair of cover blocks preferably include at least one of ferrous and non-ferrous metals. At least one waterproof jaw extending in the longitudinal direction protrudes from the upper or lower surface of the wing, and a rail for receiving the waterproof jaw is formed at the upper surface of the pair of support blocks or the lower surface of the pair of cover blocks.

That is, according to the present invention, the support blocks are respectively coupled to the ends of two adjacent upper plates of the bridge, and wing portions are formed on both sides of the body, respectively, so that a waterproof elastic member having a T-shaped cross section is positioned on the two support blocks, and then on each support block. Position the cover block formed with the finger parts so that the finger parts engage with each other, and the support block and the cover block are detachably coupled to each other so that the waterproof elastic member blocks water flowing between the finger parts between the upper surface of the support block and the lower surface of the cover block. It relates to a telescopic joint for bridges.

If the waterproof elastic member needs to be replaced due to aging or damage, or if the support block or cover block is damaged, proceed with the above-described assembly method of the expansion joint for bridges, and then disassemble each part and replace it with a new one. If reassembled, it can be used semi-permanently the flexible joint for the bridge of the present invention.

Hereinafter, a preferred embodiment of the bridge expansion joint and its prefabricated method according to the present invention will be described in detail with reference to the accompanying drawings, in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals. And duplicate description thereof will be omitted.

Figure 2 is a perspective view showing a flexible joint for a bridge according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing a flexible joint for a bridge according to an embodiment of the present invention. 2 and 3, the bridge top plate 10, the support block 30, the anchor hole 32, the nut part 34, the fastening member 40, the cover block 50, and the bolt hole 52. The waterproof elastic member 60, the body portion 62, the wing portion 64, the through hole 68, the bolt 70, the finger portion 80, the gap 90 is shown.

A pair of support blocks 30 are respectively coupled by fastening members 40 to the ends of two adjacent top plates 10 of the bridge. Fastening member 40 is preferably fastened so as to decompose using a bolt or the like, it is more preferable to use a chemical anchor when considering the coupling with the top plate for bridges mainly constructed of concrete. The number of fastening members 40 can be added or subtracted as needed. When using bolts as fastening members 40, it is preferable to use spring washers or the like so that bolts are not loosened by vibration. In the case where the upper plate 10 of the bridge is made of concrete, it is preferable to use a chemical anchor for drilling the position corresponding to the anchor hole 32 of the upper plate and injecting epoxy resin or the like into the upper plate 10 before joining the fastening member 40. desirable.

The support block 30 may be manufactured in a box shape having a rectangular parallelepiped shape as a whole, but may be formed so that the inside thereof becomes an empty space for saving material. In this embodiment, as can be seen in Figure 2, the empty space is formed in a part of the side of the support block 30 in contact with the bridge top plate. Therefore, the support block is provided with an anchor hole 32 and the installation portion of the anchor bolt, the nut portion 34, and can be formed in various shapes within the range that maintains the overall box-shaped frame.

The gap between the support block 30 and the upper surface of each of the waterproof elastic member 60 is located, the waterproof elastic member 60 is integral with the body portion 62 and the body portion 62 and protrudes in both side directions. The formed wing portion 64 has a T-shaped cross section. The waterproof elastic member 60 is excellent in elasticity and durability since frequent elongation and contraction is repeated, and it is preferable to use a material having excellent water resistance and oil resistance since it comes into contact with lubricants leaked from vehicles passing through rainwater or bridges. .

The cover block 50 is coupled to the upper surface of the support block 30, respectively, a plurality of nut parts 34 are formed in the support block 30, and the cover block 50 has a position corresponding to the nut part 34. The bolt hole 52 is formed in the cover block 50 is coupled to the support block 30 by allowing the bolt 70 to pass through the bolt hole 52 to be coupled to the nut part 52.

The bolt 70 and the nut part 34 are assembled to be fastened and dismantled, and are preferably fastened by using a spring washer or the like so that the bolt 70 is not loosened due to vibration generated by the vehicle passing through the bridge. . At this time, the wing 64 of the elastic member 60 is preferably pressed by the upper surface of the support block 30 and the lower surface of the cover block 50 to increase the waterproof performance.

One side of the cover block 50 has a finger portion 80 is formed, forming a gap 90 is engaged. The planar shape of the finger portion 80 may be all of the various shapes of the finger plate that is commonly used within the range obvious to those skilled in the art, such as curved, triangular, trapezoidal.

The cover block 50 is formed in a strip shape extending in one direction because it is a member forming a joint of the bridge upper plate. However, the support block 30 supporting the cover block 50 does not necessarily have to have a band shape extending in one direction corresponding to the cover block 50, and supports the cover block 50 to support the bolt 70. Within the range that can be tightened can be produced in an intermittent block shape. If the support block 50 is installed only in the bolted portion of the cover block 50, the workability may be somewhat reduced, there is an effect of reducing the member.

On the other hand, in order to improve the ride comfort of the vehicle passing through the bridge, the height after the support block 30, the waterproof elastic member 60 and the cover block 50 should be matched with the upper surface of the packaged bridge top plate 10. . In addition, if the upper surface of the finger portion 80 is closer to the end to have a tapered cross-sectional shape inclined downward, it is possible to reduce the slight vibration generated when the wheel of the vehicle passing through the bridge passes through the gap 90. Can be. Therefore, it is preferable to manufacture the cover block 50 by appropriately adjusting the inclination of the finger portion 80 to minimize the generation of vibration in consideration of the speed of the vehicle passing through the bridge.

The support block 30 and the cover block 50 may be made of a material such as steel, non-ferrous metal. However, the present invention is not limited to the steel or non-ferrous metal as the material of the support block 30 and the cover block 50. It is, of course, may include a material that can be used as a joint member of the top plate for road bridges within a range apparent to those skilled in the art, such as precast concrete (PC), synthetic resin.

However, the present invention relates to the expansion joint for bridges on the premise of the prefabricated construction method, easy to repair and replace after construction, so that the process of placing concrete in the field should be excluded, and accurate dimensions can be maintained during the site assembly Since it must be able to withstand the load when passing through the vehicle, the most suitable material for the support block and cover block used in the prefabricated method of the present invention is steel or nonferrous metal.

On the other hand, the space formed by the gap 90 of the finger portion 80 and the upper surface of the waterproof elastic member 60 is filled with an elastic joint filler (not shown) to expose the waterproof elastic member 60 directly to the atmosphere. It is possible to prevent the lifespan from being shortened by rain, oil or oil.

The upper plate of the bridge to which the flexible joint for bridges according to the present invention having the above-described structure is applied changes its position due to temperature change, climatic conditions such as an earthquake, or vibration generated by a vehicle passing through the bridge. When is stretched or contracted, the elastic member 60 is stretched.

Since the wing 64 of the elastic member 60 is fixed by the upper surface of the support block 30 and the lower surface of the cover block 50, it is not stretched or shrunk, and only the body portion 62 is stretched or shrunk. Body portion 62 may be formed with a through hole 68 in the direction parallel to the body portion 62 in the center of the body portion 62 for easy extension and contraction, the cross-sectional shape of the through hole 68 is circular Or may be variously formed, such as oval.

Bolts for coupling the cover block 50 to the support block 30 when the flow volume of the bridge is applied to increase or decrease the traffic volume of the bridge to which the elastic joint for the bridge is applied according to the present invention ( By changing the position of 70), the adjustment of the clearance can be easily performed.

On the other hand, the upper and lower surfaces of the wing portion 64 of the waterproof elastic member 60 may be formed to protrude a waterproof jaw (not shown) in a direction parallel to the body portion 62 to improve the waterproof effect. In this case, a groove of a rail shape in which a waterproof jaw (not shown) of the waterproof elastic member 60 may be accommodated on the upper surface of the support block 30 in contact with the wing 64 and the lower surface of the cover block 50 ( (Not shown).

Figure 4 is a flow chart for the prefabricated method of the expansion joint for bridges according to an embodiment of the present invention. In the case of applying the prefabricated construction method of the flexible joint for bridges according to the present invention to a new bridge, the following steps are carried out.

(A) A pair of support blocks 30 having anchor holes 32 and nut portions 34 are disposed at the ends of two adjacent upper plates 10 of the bridge, and the supporting blocks 30 of the upper surface of the upper plate 10 are disposed. A portion corresponding to the position of the anchor hole 32 in the) is drilled using a means such as a drilling machine (P10).

(B) the fastening member 40 is coupled to the upper plate 10 by passing through the anchor hole 32 of the support block 30. At this time, it is preferable to use a chemical anchor as a method of coupling the fastening member 40 (P20).

(C) A pair of wing portions 64 are formed on both sides of the body portion 62 so that the body portion 62 of the waterproof elastic member 60 having a T-shaped cross section of the pair of support blocks 30 is formed. Inserted into the gap, and installed on the upper surface of each support block 30 so that the wings 64 of the waterproof elastic member 60 is positioned (P30).

(D) A pair of cover blocks 50 having bolt holes formed on the upper surfaces of the support block 30 and the waterproof elastic member 60 are disposed such that the bolt holes 52 correspond to the nut parts 34 and the bolts ( 70 is assembled to the nut part 34 through the bolt hole 52 formed in the cover block 50. At this time, the finger parts 80 to be engaged with each other (P40).

By performing the steps as described above, the prefabricated construction method of the flexible joint for bridges according to the present invention can be applied to the new bridge. Since it does not go through the steps of concrete pouring, it does not need time to harden concrete, which shortens the construction period, and because only simple fastening method is used for joining each part, it is unnecessary for the welding site or equipment necessary for concrete pouring. The equipment is simplified, the safety is greatly improved, and the manpower required for construction is saved.

When the prefabricated construction method of the bridge expansion joint according to the present invention is applied to a bridge in which the bridge expansion joint according to the prior art is installed, it is formed at the end of (A) the bridge top plate prior to the new construction method described above. A step P1 of crushing the futa member holding the bridge expansion joint and removing the existing bridge expansion joint is performed.

By performing the steps as described above, the prefabricated construction method of the flexible joint for bridges according to the present invention can be applied to a bridge provided with the conventional flexible joint for bridges. By replacing the bridge expansion joint according to the prior art with the bridge expansion joint according to the present invention it is possible to greatly reduce the cost and time required for the maintenance and repair that occurs later.

Figure 5 is a flow chart for the prefabricated method of the expansion joint for bridges in accordance with another preferred embodiment of the present invention. When the waterproof elastic member of the stretchable joint for bridges according to the present invention is replaced with old or damaged, it is carried out in the following steps.

(A) The bolt 70 is dismantled and the cover block 50 is separated from the support block 30 (P50).

(B) The damaged waterproof elastic member 60 is removed, and a new waterproof elastic member (not shown) is installed at the same position as the damaged waterproof elastic member 60 (P60).

(C) Place the cover block 50 in the position before removal, and retighten the bolt 70 (P70).

By carrying out the steps as described above, the prefabricated construction method of the stretchable joint for bridges according to the present invention can be applied when the waterproof elastic member is damaged or replaced. Since only a tool capable of dismantling the fastening member and no need for shredding or pouring of the after-load material can be quickly replaced, various problems caused by the traffic control of the bridge can be reduced.

Although the preferred embodiments of the present invention have been described above, those skilled in the art may variously modify and modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that it can be changed. In addition, the present invention can be applied not only to bridges, but also to overpasses, freeways and highways.

According to the present invention having the configuration as described above, it is possible to easily disassemble and assemble the components of the expansion joint, so that the replacement work in the event of aging of the waterproof elastic member or breakage of the expansion joint to shorten the construction period and traffic control time If the parts of the expansion joint are damaged or aged, it is possible to easily replace only the corresponding parts, which saves resources, and saves the cost of maintenance and repair. It can prevent corrosion of the bridge system and protect vehicles and pedestrians passing under the bridge.

Claims (13)

A pair of support blocks each detachably coupled to the ends of two adjacent top plates of the bridge; A pair of cover blocks that are detachably coupled to the upper portions of the pair of support blocks, respectively, wherein a finger portion is formed on one side and the finger portions are meshed with each other; It includes a waterproof elastic member having a T-shaped cross section having a wing portion interposed between the pair of support blocks and the pair of cover blocks and a body portion interposed between the pair of support blocks, The waterproof elastic member is a bridge expansion and contraction interposed so as to be replaced when the pair of cover blocks separated from the pair of support blocks. The method of claim 1, The pair of support blocks is a flexible joint for bridges respectively coupled to the two top plates by bolts. The method of claim 1, At least one nut part is formed at each of the pair of support blocks, and at least one bolt hole is formed at each of the pair of cover blocks corresponding to the nut part, and the pair of cover blocks is formed through the bolt hole. A flexible joint for bridges coupled to the pair of support blocks by one or more bolts assembled to nut parts. The method of claim 1, The pair of support blocks and the pair of cover blocks is a flexible joint for a bridge including any one or more of ferrous and non-ferrous metals. The method of claim 1, The finger joint is a stretchable joint for a bridge having a tapered cross-section is reduced toward the end. The method of claim 1, One or more waterproof jaws protruding in the longitudinal direction from the upper or lower surface of the wing portion, the upper surface of the pair of support blocks or the lower surface of the pair of cover blocks for the bridge is formed a rail for receiving the waterproof jaw Telescopic joint. The method of claim 1, A stretch joint for bridges, wherein the filler for expansion joint is interposed between the finger parts. The method of claim 1, One or more bridge joints formed with at least one through hole in the wing. (a) arranging a pair of support blocks having anchor holes and nut portions at ends of two adjacent upper plates of a bridge, and drilling a portion corresponding to the anchor holes of the upper plates; (b) fastening the chemical anchor to the anchor hole to detachably couple the pair of support blocks to the top plate; (c) a pair of wing portions are formed on both sides of the body portion, the pair of wing portions in contact with the upper surface of the pair of support blocks, respectively, the T-shaped waterproof elastic member, the body portion supports the pair Installing to be interposed between the blocks; And (d) a pair of cover blocks having bolt holes formed on the pair of support blocks such that the bolt holes correspond to the nut parts, and the bolts are assembled to the nut parts through the bolt holes. Detachably coupling a pair of cover blocks to the pair of support blocks; One side of the pair of cover blocks, each finger portion is formed and the assembly method of the stretchable joint for bridges in which the finger portion is meshed with each other. The method of claim 9, The method of prefabrication of the flexible joint for bridges further comprising the step of demolition of the existing joint by crushing the futa material of the existing joint formed at the end of the two top plate before the step (a). A pair of support blocks are detachably coupled to each other by constructing chemical anchors at the ends of two adjacent upper plates of the bridge, and are detachably coupled to each other by fastening bolts to the upper portions of the pair of support blocks, respectively. And a pair of cover blocks that are additionally formed and the finger portions are meshed with each other, a wing portion interposed between the pair of support blocks and the pair of cover blocks, and a body portion interposed between the pair of support blocks. And a waterproof elastic member having a T-shaped cross section, wherein the waterproof elastic member includes a method for repairing a stretchable joint for bridges interposed so as to be replaced when the pair of cover blocks is separated from the pair of support blocks. In (a) disassembling said bolt and separating said pair of cover blocks from said pair of support blocks; (b) removing the waterproof elastic member and replacing it with a new waterproof elastic member; And and (c) coupling the pair of cover blocks with the pair of support blocks and fastening the bolts. The method according to claim 9 or 11, The pair of support blocks and the pair of cover blocks prefabricated construction method of the flexible joint for bridges including any one or more of ferrous and non-ferrous metals. The method according to claim 9 or 11, One or more waterproof jaws extending in the longitudinal direction protrude from the upper or lower surface of the wing portion, the upper surface of the pair of support blocks or the lower surface of the pair of cover blocks for the bridge is formed a rail for receiving the waterproof jaw Prefabricated construction of expansion joints.

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