KR100808855B1 - A seismic bumper type finger joint for pounding safety of bridge - Google Patents

Abstract

A seismic shock absorbing finger joint for preventing the pounding of a bridge is provided to protect a bridge slab and base plates from large horizontal displacement such as an earthquake and to perform maintenance work simply and economically by absorbing shock and separating finger plates upward not to make contact with a slab. A seismic shock absorbing finger joint for preventing the pounding of a bridge comprises anchor laying portions(30,40) formed on corresponding ends between a slab(10) and a slab(20) forming a bridge slab, a pair of finger plates(50,60) fixed to the corresponding ends of the anchor laying portions, and a bolt(90) and a nut(92) coupled to the top of base plates(70,80) coupled to the anchor laying portions and fastening the finger plates, wherein a bolt guide portion(100) is formed on a horizontal portion at the top of one of the base plates and composed of a bolt insertion groove(120) to insert a head portion of a bolt(90) coupling the finger plate with the nut and a guide rail(140) to guide the head portion of the bolt inserted from the bolt insertion groove to slide along the longitudinal direction of a bridge, an inclination angle(200) is formed to guide fingers to slide upward when the fingers are bumped against each other by expansion and contraction of a bridge on the corresponding ends of the finger plates, and a shock absorber(300) is formed to supply shock absorbing force to the rear ends of the finger plates when the finger plates move backward due to the bump and composed of a separating member(320) coupled to a screw tap(500) formed on the rear end of the base plate by a bolt(520) and formed to be lift up along inclination angles(322,324) not to make direct contact with the slab when the finger plate moves backward.

Description

A seismic bumper type finger joint for pounding safety of bridge}

The present invention relates to a finger joint applied to the expansion and contraction of the upper structure to the bridge, and more specifically to the separation of the finger plate constituting the finger joint constituting the finger joint due to the occurrence of excessive displacement, such as earthquake on the bridge top plate, The present invention relates to a cushioning finger joint for seismic isolation for preventing the pounding of a bridge to facilitate the repair of the finger plate as well as the protection of the bridge top plate and the shift and the finger joint structure.

In general, the finger joint refers to an expansion joint installed to cope with the expansion and contraction of the slab when the expansion action in the longitudinal direction of the slab constituting the bridge, which is generated by the structure of the bridge deck or by temperature and seasonal changes It will respond appropriately to expansion and contraction.

The finger joint may include a finger plate having a plurality of fingers corresponding to each other at a corresponding end of the bridge slab and located in a pair of left and right, and a base plate integrally provided at the corresponding end of the slab to closely support the bottom of the finger plate. And a bolt and a nut for coupling and fixing the finger plate to the base plate, and an anchor buried portion that forms a corresponding end of the slab and is coupled through a filler to maintain the base plate in a fixed state.

The finger joint configured as described above has a shape in which the fingers of the finger plate are coupled to each other when elastic force is generated and correspond to the elastic force.

However, if the displacement of the earthquake or the like causes the finger plates to collide with each other, the finger plate may be damaged or the base plate, anchor buried portion, and slab ends of the finger plate may be damaged, resulting in fatal damage to the bridge. There is a problem that must be repaired and replaced the whole structure.

In this case, the construction cost is increased due to the replacement of the repair, and the traffic control time is greatly increased due to the delay in the construction period, which causes a huge economic loss cost.

Accordingly, the present invention was devised to solve the above problems, an object of the present invention is to allow the finger plate constituting the finger joint when the displacement of the earthquake, such as earthquake on the bridge top plate can be separated with the buffering force to be buried along with the bridge top plate It is to provide a shock-absorbing finger joint for seismic isolation for the prevention of the pounding of the bridge to facilitate the maintenance of the finger plate as well as the protection of the base plate.

That is, the bridge slab can be protected even when the bridge has a relatively large horizontal displacement caused by an earthquake, so that the operation can be greatly simplified and the maintenance cost can be greatly reduced.

In order to achieve the above object, the present invention provides a pair of finger plate and the anchor buried portion which is fixed to the anchor buried portion formed in the corresponding end between the slab and the slab forming the bridge top plate correspondingly to the corresponding end of the anchor buried portion A bridge finger joint comprising a bolt and a nut for fastening the finger plate to a base plate coupled to an upper surface, the bolt for nut coupling the finger plate to one or both horizontal portions of the pair of base plates. The bolt insertion groove and the head of the bolt inserted from the bolt insertion groove so as to be inserted is further provided with a plurality of bolt guides having a guide rail so that the guide rail slides a predetermined distance in a locked state along the longitudinal direction of the bridge.

Here, it is preferable to form an inclination angle so as to slide upward when hitting the bottom face of the plurality of fingers end formed on the corresponding surface of the pair of finger plate.

In addition, the rear end of the finger plate is provided with a cushioning means to provide a cushioning force in the rear movement of the finger plate.

The buffer means is a release member formed so that both ends are in contact with each other through the inclination angle between the rear end of the finger plate and the slab and are lifted along the inclination angle when the finger plate moves backward.

The detachment member is coupled to and fixed via a bolt to a screw tab provided at the rear end of the base plate.

In addition, the buffer means, it is possible to apply the elastic material provided on the rear end of the finger plate and the upper portion of the base plate in contact with it.

Therefore, in the seismic buffering finger joint for preventing the pounding of the bridge according to the present invention, the finger plate constituting the finger joint when the displacement occurs, such as earthquake on the bridge top plate is separated after moving a certain period with the buffering force action bridge bridge plate and finger joint structure As well as the protection of the finger plate has the effect of making it easy to repair.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the bridge finger joint coupling structure for replaceable bolts according to the present invention will be described in detail, and related well-known techniques and the like may obscure the gist of the present invention. If it is determined that the detailed description thereof will be omitted.

Finger joints according to the present invention, the anchor buried portion 30, 40 formed in the corresponding end between the slab 10 and the slab 20 forming the bridge top plate as shown in Figs. A pair of finger plates 50 and 60, which are fixedly positioned at corresponding ends of the parts 30 and 40, and base plates 70 and 80 coupled to the anchor buried portions 30 and 40, respectively. It is coupled to the upper surface of the) consists of a bolt 90 and a nut 92 for fastening the finger plate 50, 60.

The slabs 10, 20, anchor buried portions 30, 40, base plates 70, 80, finger plates 50, 60, bolts 90 and nuts 92 are well known in the art. Since the same function as the detailed description thereof will be omitted.

In addition, the opposite ends of the base plate 70 and the base plate 80 are coupled to both ends of the arc-shaped drain plate to perform the same cushion or drainage function as a known function.

One of the base plates 70 and 80 has a bolt guide part, which is a key point of the present invention, to allow the bolt 90 to be moved after the bolt 90 is inserted into a horizontal portion of the base plate 80. 100) is formed.

The bolt guide portion 100, as shown in Figure 3, the bolt insertion groove 120 and the bolt insertion groove (120) so that the head of the bolt 90 for coupling the finger plate 50 to the nut 92 is inserted ( The head of the bolt 90 inserted from the 120 is configured as a guide rail 140 so as to slide a predetermined distance in a locked state along the longitudinal direction of the bridge.

The bolt guide part 100 may be formed on one or both sides of the base plate 70 and 80 corresponding to each other, as shown in FIGS. 1 and 2.

In more detail, if the head of the bolt 90 is inserted through the bolt insertion groove 120 and then moved in the direction of the guide rail 140 formed along the bridge length direction, the head of the bolt 90 As it moves to the locked state, upward deviation is prevented. In this state, the threaded portion of the bolt 90 passes through the bolt hole of the pinker plate 60 and then tightens the finger plate 60 through the nut 92.

In addition, the inclined angle 200 is lowered at the lower end of the pair of fingers of the pair of finger plates 50 and 60 when the collision phenomenon occurs due to the movement of the bridge. Is formed.

4 to 5 illustrate a cushioning means 300 at a rear end portion of the finger plate 60 to provide a buffering force when the vehicle is moved backward due to the collision of the finger plate 50 and the finger plate 50 corresponding to the finger plate 60. It is further illustrated.

The buffer means 300 is to be able to generate a buffer force without being in direct contact with the slab 20 during the rear movement of the finger plate 60, which is upward with providing the buffer force during the movement of the finger plate 60 The separation member 320 is separated by.

The detaching member 320 may be made of metal, synthetic resin, and concrete, and both ends may be in contact with each other through the inclination angles 322 and 324 between the rear end of the finger plate 60 and the slab 20. 60 is formed to be lifted along the inclination angles 322 and 324 during the rearward movement.

The detaching member 320 is formed by coupling the bolt 520 to the screw tab 500 provided at the rear end of the base plate 80.

The screw tab 500 is preferably formed with a weaker strength than the bolt 90 so that the bolt 520 coupled thereto is induced to break when the detaching member 320 moves upward.

As another example, the shock absorbing means 300, it is possible to be applied to the elastic material provided on the rear end of the finger plate 60 and the base plate 80 in contact with it. The stretchable material may be applied to known rubber materials, steels, and metals, which are not described in the drawings.

Here, the shock absorbing means 300 may be applied not only to one side of the pair of finger plates 50 and 60 but also to both sides (see FIG. 6).

Referring to the application state of the seismic shock-absorbing finger joint for preventing the pounding of the bridge according to the present invention configured as described above are as follows.

At the time of installation, as shown in FIGS. 1 to 5, the base plates 70 and 80 may be fixed to the upper anchor buried portions 30 and 40 at the corresponding ends of the slabs 10 and 20. The base plate having the bolt guide part 100 formed on one or both of the base plates 70 and 80 is fixed in position. The thread tab 500 is formed at the rear end of the base plate 80. Then, the head of the bolt 90 is inserted into the bolt insertion groove 120 of the bolt guide part 100, and then the bolt 90 is moved in the direction of the guide rail 140 to fix the position. Then, the finger plate 60 is coupled to the threaded portion of the bolt 90 and then coupled to them by tightening the nut 92. When the coupling member 320 is continuously coupled to the screw tab 500 through the bolt 520, the installation is completed.

When a large contraction force is generated due to the horizontal displacement in the installed state as shown in Figure 6a, first, the corresponding ends of the finger plate 50, 60 hit each other, at this time, the finger plate 60 is moved away External force is applied to the member 320. Then, the detaching member 320 is moved upward by the inclination angles 322 and 324. At this time, as shown in FIG. Only 60 of the finger joint structure is damaged without 60 directly exerting an external force on the end of the slab 20. After that, replace only the damaged part and then install the finger joint structure again.

1 is a cross-sectional view showing a coupling state of the seismic shock-absorbing finger joint for preventing the pounding of the bridge according to the present invention,

2 is another embodiment of FIG.

3 is a planar main view showing the plane of the base plate in FIG. 1 or 2;

Figure 4 is a cross-sectional view further provided with a shock absorbing means in Figure 1 as another example showing the combined state of the shock-absorbing buffer finger joint for preventing the pounding of the bridge according to the invention,

FIG. 5 is a plan view of the base plate of FIG. 4;

6A is a cross-sectional view illustrating a state in which a finger plate is moved due to horizontal displacement in FIG. 4;

FIG. 6B is a cross-sectional view illustrating a process in which the finger joint structure is separated by the continuous progress of FIG. 6A;

7 is another embodiment of FIG.

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

100: bolt guide

120: bolt insertion groove 140: guide rail

300: buffer means

320: release member

500: thread tap

Claims (6)

A pair of finger plates 50 which are fixedly positioned to correspond to each other at anchor corresponding portions 30 and 40 formed at corresponding ends between the slab 10 and the slab 20 forming the bridge top plate. For bridge top plate comprising a bolt (90) and a nut (92) for fastening the finger plate (50, 60) to the base plate (70) (80) coupled to the upper surface of the anchor buried portion (60) In the finger joint, Bolt insertion grooves such that the heads of the bolts 90 that couple the finger plates 50 and 60 to the nuts 92, respectively, on one or both horizontal portions of the pair of base plates 70 and 80 are inserted. 120 and a plurality of bolt guides 100 having a guide rail 140 so that the head of the bolt 90 inserted from the bolt insertion groove 120 slides a predetermined distance in a locked state along the longitudinal direction of the bridge. Shock-absorbing finger joint for seismic isolation to prevent the pounding of the bridge, characterized in that it comprises a). The method of claim 1, Surface for preventing the pounding of the bridge, characterized in that the inclination angle 200 is formed so as to be guided upward when hit the bottom surface of the plurality of fingers end formed on the corresponding surface of the pair of finger plate 50, 60 Genuine buffer finger joints. The method according to claim 1 or 2, For vibration isolation to prevent the pounding of the bridge, characterized in that for providing a shock absorbing means 300 to provide a cushioning force in the rear movement of the finger plate 50, 60 at the rear end of the finger plate 50, 60 Shock absorbing finger joint. The method of claim 3, The buffer means 300, Both ends are in contact with each other through the inclination angle (322, 324) between the rear end of the finger plate 50, 60 and the slab and is formed to be lifted along the inclination angle when the finger plate 50, 60 is moved backwards. Shock-absorbing finger joint for seismic isolation to prevent the pounding of the bridge, characterized in that the separation member (320). The method of claim 4, wherein The detaching member 320, A shock absorbing finger joint for seismic isolation for preventing the pounding of the bridge, characterized in that the bolt 520 is coupled to the screw tab 500 provided on the rear end of the base plate. The method of claim 3, The buffer means 300, A shock absorbing finger joint for preventing vibration of the bridge, characterized in that the elastic material is installed on the rear end of the finger plate (50) (60) and the upper portion of the base plate in contact with it.

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