KO, Dong Joon (1014-102, Jugong Apt.65, Jungang-dong, Gwacheon-si, Gyeonggi-do 420-757, KR)
LEE, Jun Sung (2nd Floor, 633-4 Mok 3-dong, Yangcheon-gu, Seoul 158-811, KR)
JEON, Young Seo (1 Byeoksan Apt, 455 Hongeun-dong, Seodaemun-gu, Seoul 120-771, 17-1101, KR)
LIM, Seong Bo (202312-20, Gaebong 3-dong Guro-gu, Seoul 152-093, KR)
CHO, Yong Kul (201-403, Jugong Apt.874, Dang-dong, Gunpo-si, Gyeonggi-do 435-010, KR)
LEE, Doo Sung (2 Lilac Maeul, 528-3 Sang 3-dong, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-757, 330-1102, KR)
KO, Dong Joon (1014-102, Jugong Apt.65, Jungang-dong, Gwacheon-si, Gyeonggi-do 420-757, KR)
LEE, Jun Sung (2nd Floor, 633-4 Mok 3-dong, Yangcheon-gu, Seoul 158-811, KR)
JEON, Young Seo (1 Byeoksan Apt, 455 Hongeun-dong, Seodaemun-gu, Seoul 120-771, 17-1101, KR)
LIM, Seong Bo (202312-20, Gaebong 3-dong Guro-gu, Seoul 152-093, KR)
CHO, Yong Kul (201-403, Jugong Apt.874, Dang-dong, Gunpo-si, Gyeonggi-do 435-010, KR)
Claims
[ 1 ] An earthquake-resistant expansion joint comprising: a hinge shaft support member mounted on one end of one deck slab of deck slabs constituting a bridge or an elevated road; a hinge finger plate member pivotally coupled to the hinge shaft support member and hinged to the hinge shaft support member at its one end to be slid in a lateral direction of the bridge or the elevated road along a pivot center shaft thereof; a finger plate member engaged with the other end of the hinge finger plate member at its one end to compensate a gap between the deck slabs depending on variation of the gap; and a finger plate support member fixed to the other deck slab in contact with the one deck slab to slidably support the finger plate member such that the finger plate member is slid in a lateral direction of the bridge or the elevated road. [2] The earthquake-resistant expansion joint of claim 1, wherein the hinge finger plate member comprises: a pivot shaft part pivotally and slidably supported by the hinge shaft support member to form a pivot center shaft; and a hinge finger part extending to cover the gap between the deck slabs and projecting to form fingers to be engaged with the finger plate member at the other end thereof. [3] The earthquake-resistant expansion joint of claim 2, wherein the pivot shaft part is separated from the hinge finger plate member to be inserted into a hinge groove formed at the hinge shaft support member, and a bolt is fastened to the pivot shaft part and the hinge shaft support member to connect the pivot shaft to the hinge shaft support member. [4] The earthquake-resistant expansion joint of claim 1, wherein a finger part projects from one end of the finger plate member to be engaged with the hinge finger part of the hinge finger plate member, and a rail part projects from the other end in a stepped manner to be slidably supported by the finger plate support member. [5] The earthquake-resistant expansion joint of claim 4, wherein the finger plate support member comprises: a fixing plate fixed to the deck slab; a guide block having a guide part engaged with the rail part to slidably support the rail part and fixed to the fixing plate by a bolt; and a fixing busing fixed to the deck slab and to which the bolt is fastened to fix the guide block. [6] The earthquake-resistant expansion joint of any one of claims 1 to 5, further comprising an anti- vibration member disposed between the finger plate member and the finger plate support member and absorbing vibration and noise caused by passing vehicles, and an anti-corrosion plate mounted between the anti- vibration member and the finger plate member to readily slide the finger plate member and prevent corrosion due to rainwater.
[7] The earthquake-resistant expansion joint of any one of claims 1 to 5, wherein the hinge finger plate member and the finger plate member are divided in plural in a longitudinal direction thereof respectively, both ends of the hinge finger plate members and the finger plate members are connected by connection members fastened by bolts, and insert grooves are formed at the hinge finger plate member and the finger plate member to insert the connection members.
[8] The earthquake-resistant expansion joint of any one of claims 1 to 5, further comprising a rubber waterproof member disposed between the deck slabs to collect rainwater and foreign substances, wherein the rubber waterproof member includes a rubber waterproof plate made of a rubber material to form a plate shape and having hooks with enlarged cross- sections at both ends thereof, sliding plates surrounding the hooks of the rubber waterproof plate and reducing a friction force, inner guide rails slidably surrounding the sliding plates and disposed in a lateral direction of the deck slabs, and outer guide rails fixedly connecting connection parts of the inner guide rails with no step and adhered to opposite side surfaces of the deck slabs by an adhesive agent. |
Description
EARTHQUAKE-RESISTANT EXPANSION JOINT
Technical Field
[1] The present invention relates to an earthquake-resistant expansion joint, and more particularly, to an earthquake-resistant expansion joint which is capable of performing three-axial movement by applying a hinge structure to a finger-type expansion joint, to thereby reduce damage to elevated roads or bridges due to earthquakes. Background Art
[2] Generally, a relatively long bridge having a plurality of piers has a plurality of deck slabs divided in a longitudinal direction thereof and expansion joints installed between the deck slabs in order to deal with expansion and shrinkage of the bridge caused by temperature variation.
[3] As shown in Figs. 1 and 2, a conventional expansion joint for a bridge includes upper cover plates 101a and 101b installed at opposite ends of the deck slabs to be coupled to each other and expandable according to temperature variation, anchor bolts 102 for fastening the upper cover plates 101a and 101b to after-cured concretes 105, reinforcement iron rods 103 for increasing a fastening force between the anchor bolts 102 and the after-cured concretes 105 and reinforcing strength of the after-cured concretes 105, and a rainwater and foreign substance collecting rubber waterproof member 104 fixed to each of the after-cured concretes 105 on both sides thereof. Designated by reference numeral 106 are reinforcing rods disposed in the deck slabs of the bridge.
[4] Although the conventional expansion joint for a bridge having the structure as above can be moved in a vehicle moving direction within an expandable range when an earthquake occurs, however, it is impossible for the expansion joint to move in a lateral direction, i.e., in a direction perpendicular to the vehicle moving direction. In addition, since the expansion joints are not allowed to be moved in a longitudinal direction, when breast walls of abutments vertically move upon occurrence of the earthquake, the slabs, girders, and other structures installed at the bridge, to which the expansion joints are coupled, may be damaged due to the earthquake. In result, the deck slabs may be separated from the bridge.
[5] Further, the rubber waterproof member 104 is coupled to the concrete slab by anchor bolts 102 before installation of the upper cover plates 101a and 101b. Then, the upper cover plates 101a and 101b are installed and nuts are fastened to the anchor bolts 102 to complete installation of the expansion joints. Therefore, when the rubber waterproof member 104 is damaged, the upper cover plates 101a and 101b have to be
opened to exchange the damaged rubber waterproof member 104 after traffic control. In addition, this damaged rubber waterproof member may bring about water leakage, thereby causing additional damage to a lower structure. Disclosure of Invention
Technical Problem
[6] Therefore, the present invention has been made in view of the above problems of the prior art, and it is an object of the present invention to provide an earthquake- resistant expansion joint capable of being three-axially moved to deal with earthquake.
[7] Another object of the present invention is to provide an earthquake-resistant expansion joint capable of readily installing and exchanging a rubber waterproof member.
[8] Other objects and advantages of the present invention can be understood by the following description, and become apparent with reference to the embodiments of the present invention. Also, it will be obvious to those skilled in the art of the present invention that the objects and advantages of the present invention can be realized by the means as claimed and combinations thereof. Technical Solution
[9] In accordance with one aspect of the present invention, there is provided an earthquake-resistant expansion joint comprising: a hinge shaft support member mounted on one end of one deck slab of deck slabs constituting a bridge or an elevated road; a hinge finger plate member pivotally coupled to the hinge shaft support member and hinged to the hinge shaft support member at its one end to be slid in a lateral direction of the bridge or the elevated road along a pivot center shaft thereof; a finger plate member engaged with the other end of the hinge finger plate member at its one end to compensate a gap between the deck slabs depending on variation of the gap; and a finger plate support member fixed to the other deck slab in contact with the one deck slab to slidably support the finger plate member such that the finger plate member is slid in a lateral direction of the bridge or the elevated road.
Advantageous Effects
[10] In an earthquake-resistant expansion joint according to the present invention, when deck slabs are moved in an X-axis direction as a longitudinal direction, in a Y-axis direction as a lateral direction, and in a Z-axis direction as a vertical direction of a bridge due to earthquakes, a hinge finger plate member and a finger plate member are gap-adjusted, pivoted or slid in the X-axis direction, Y-axis direction and Z-axis direction to deal with earthquake problems, thereby preventing separation of the deck slabs and damage to a connection part due to the earthquakes.
[11] In addition, the hinge finger plate member and the finger plate member are divided
into sections and fixed by connection members to readily perform assembly and disassembly thereof, thereby reducing working time.
[12] Further, the sliding plate of the rubber waterproof member is slid along an inner guide rail or a wrinkled part of the rubber waterproof plate is deformed to prevent damage to the rubber waterproof member upon occurrence of earthquakes. Moreover, since an outer guide rail is fixed by an adhesive agent, its installation and dismantlement can be readily performed, there reducing working time. Brief Description of the Drawings
[13] The above and other objects and features of the instant invention will become apparent from the following description of preferred embodiments taken in conjunction with the accompanying drawings, in which:
[14] Fig. 1 is a plan view of a conventional expansion joint;
[15] Fig. 2 is a cross-sectional view of the conventional expansion joint;
[16] Fig. 3 is a plan view of an earthquake-resistant expansion joint according to an exemplary embodiment of the present invention;
[17] Fig. 4 is a cross-sectional view of the earthquake-resistant expansion joint shown in
Fig. 3;
[18] Fig. 5 is a cross-sectional view taken along the line A-A shown in Fig. 3;
[19] Fig. 6 is a view showing longitudinal behavior of the earthquake-resistant expansion joint depicted in Fig. 4;
[20] Fig. 7 is a view showing lateral behavior of the earthquake-resistant expansion joint depicted Fig. 4;
[21] Fig. 8 is a view showing vertical behavior of the earthquake-resistant expansion joint shown in Fig. 4;
[22] Fig. 9 is a perspective view of a rubber waterproof member shown in Fig. 4; and
[23] Fig. 10 is a cross-sectional view showing a rubber member interposed for preventing intrusion of foreign substances into the hinge groove shown in Fig. 4. Best Mode for Carrying Out the Invention
[24] Hereinafter, an earthquake-resistant expansion joint according to an exemplary embodiment of the present invention will be described in detail the accompanying drawings.
[25] Fig. 3 is a plan view of an earthquake-resistant expansion joint according to an exemplary embodiment of the present invention, Fig. 4 is a cross-sectional view of the earthquake-resistant expansion joint shown in Fig. 3, Fig. 5 is a cross-sectional view taken along the line A-A depicted in Fig. 3, Fig. 6 is a view illustrating longitudinal behavior of the earthquake-resistant expansion joint shown in Fig. 4, Fig. 7 is a view illustrating lateral behavior of the earthquake-resistant expansion joint depicted in Fig.
4, Fig. 8 is a view illustrating vertical behavior of the earthquake-resistant expansion joint shown in Fig. 4, and Fig. 9 is a perspective view of a rubber waterproof member shown in Fig. 4.
[26] As shown in the drawings, the earthquake-resistant expansion joint according to an exemplary embodiment of the present invention is an apparatus for connecting a plurality of deck slabs 1 and 2 constituting a bridge or an elevated road to each other, and includes a hinge shaft support member 10 mounted on one end of the deck slab 1, a hinge finger plate member 20 pivotally coupled to the hinge shaft member 10 and slidably hinged along a pivot center shaft thereof at its one end, a finger plate member 30 coupled to the hinge finger plate member 20, a finger plate support member 40 fixed to the other deck slab 2 in contact with the deck slab 1 and slidably support the finger plate member 30 in a horizontal direction that is a lateral direction of the deck slab 2, and a rubber waterproof member 50 installed between the opposite deck slabs 1 and 2 to prevent introduction of rainwater and contaminants.
[27] More specifically, the hinge shaft support members 10 are serially disposed at one end of the deck slab 1 in a lateral direction thereof and fixed thereto by anchor bolts. The hinge shaft support member 10 having a circular hinge groove 11 recessed at an exposed upper surface thereof is mounted on the deck slab 1, wherein the hinge groove 11 extends in a longitudinal direction thereof.
[28] The hinge finger plate member 20 is formed of a plate member having a predetermined width and length to cover a portion of a gap between the deck slabs 1 and 2, and includes a pivot shaft part 21 formed at one end of the hinge finger plate member 20 and pivotally and slidably mounted in the hinge groove 11 to serve as a pivot center shaft, and a hinge finger part 22 formed at the other end and projecting to form fingers disposed at predetermined intervals. The pivot shaft part 21 has a cylindrical shape detachable from the hinge finger plate member 20, and is inserted into the hinge groove 11 and fixed to one end of the hinge finger plate member 20 by bolts for their integration. As shown in Fig. 10, in order to prevent rainwater or foreign substance from intruding into the hinge groove 11 from an upper part thereof, a rubber member 26 may be interposed between the pivot shaft part 21 and the hinge shaft support member 10. The rubber member 26 has a tumbler- shaped cross-section whose lower part is inserted into a groove 21a formed at the pivot shaft part 21 and whose upper part is in contact with an inner wall of the hinge shaft support member 10.
[29] The finger plate member 30 is formed of a plate member having a predetermined width and length to cover a portion of the gap between the deck slabs 1 and 2, and includes a finger part 31 projecting from its one end and formed corresponding to the hinge finger part 22 and a rail part 32 projecting from the other end and having an enlarged cross-section at the projected end. The rail part 32 extends in a longitudinal
direction thereof. In addition, the hinge finger plate member 20 and the finger plate member 30 are disposed in a lateral direction of the deck slabs 1 and 2, and divided in plural in a longitudinal direction thereof, respectively. The hinge finger member 20 and the finger plate member 30 separated from each other are connected to connection members 24 and 34, respectively. As shown in Fig. 5, insert grooves 24a and 34a recessed to a predetermined depth are formed at the connection parts between the hinge finger plate member 20 and the finger plate member 30 such that the connection members 24 and 34 are inserted thereinto. With the connection members 24 and 34 being inserted into the insert grooves 24a and 34a, bolts 25 and 35 passing through both ends of the connection members 24 and 34 are fastened to the hinge finger plate member 20 and the finger plate member 30, so that the hinge finger plate member 20 and the finger plate member 30 can maintain the serially aligned state.
[30] The finger plate support member 40 is formed of a plate member vertically bent at its one end, and includes a fixing plate 41 fixed to the deck slab 2 by anchor bolts, a guide block 42 having a guide part 42a slidably engaged with the rail part 32 and fixed to the fixing plate 41 by bolts 43, and a fixing bushing 44 fixed to the fixing plate 41 and to which the bolts 43 are fastened. In addition, an anti-vibration member 45 and an anti-corrosion plate 46 are deposited between the finger plate member 30 and the finger plate support member 40. The anti- vibration member 45 is made of a rubber material to absorb impact sound generated when vehicles pass, and preferably has an area enough to cover an upper end of the fixing plate 41. The anti-corrosion plate 46 has an area enough to cover an upper end of the anti- vibration member 45 and prevents corrosion of the finger plate member 30 and other components due to introduction of rainwater.
[31] The rubber waterproof member 50 includes a rubber waterproof plate 51 having a plate shape and made of a rubber material, having a wrinkled part formed at its center region to deal with expansion and shrinkage in a lateral direction thereof, and hooks 51a having enlarged cross-sections formed at both ends thereof; sliding plates 52 having cross-sections surrounding the hooks 51a and extending along the hooks 51a to reduce a friction force; inner guide rails 53 having cross-sections surrounding the sliding plates 52 and disposed in a lateral direction of the deck slabs 1 and 2; and outer guide rails 54 having cross-sections surrounding the inner guide rails 53, connecting the inner guide rails 53 to remove steps of connection parts of the inner guide rails 53, and adhered to opposite sides of the deck slabs 1 and 2 by an adhesive agent. The outer guide rails 54 may be adhered to a side surface of the deck slab 1 as well as a side surface of the hinge shaft support member 10.
[32] Now, the operation of the earthquake-resistant expansion joint having the structure as above will be described as follows.
[33] As shown in Fig. 6, when the deck slabs are moved in a longitudinal direction of the bridge, the earthquake-resistant expansion joint according to an exemplary embodiment of the present invention deals with expansion and shrinkage of the deck slabs by approaching or spacing the hinge finger part 22 and the finger part 31 from each other. That is, when a gap between the deck slabs 1 and 2 is widened, an overlapping length between the hinge finger part 22 and the finger part 31 is shortened, and when the gap between the deck slabs 1 and 2 is narrowed, the overlapping length therebetween is lengthened, thereby compensating expansion and shrinkage of the deck slabs. At this time, the wrinkled part of the rubber waterproof plate 51 of the rubber waterproof member 50 is deformed depending on longitudinal expansion and shrinkage of the deck slabs to prevent intrusion of rainwater and contaminants.
[34] As shown in Fig. 7, when the deck slabs 1 and 2 are moved in a lateral direction of the bridge, the pivot shaft 21 of the hinge finger plate member 20 is slid along the hinge groove 11 of the hinge shaft support member 10 to move in a lateral direction of the bridge, to thus deal with position movement of the deck slabs 1 and 2. At the same time, the rail part 32 of the finger plate member 30 slidably supported by the guide part 42a of the guide block 42 is slid along the guide part 42a to deal with position movement of the deck slabs 1 and 2. That is, as the deck slabs 1 and 2 are moved in a lateral direction of the bridge, the pivot shaft 21 slidably inserted into the hinge groove 11 and the rail part 32 slidably supported by the guide part 42a are slid to deal with the position movement.
[35] As shown in Fig. 8, when the deck slabs 1 and 2 are moved in a vertical direction of the bridge by vibrations generated in a vertical direction of the bridge, the pivot shaft part 21 pivotally fixed to the hinge groove 11 is pivoted to deal with height variation thereof. That is, when the one deck slab 1 is moved higher than the other deck slab 2, the hinge finger plate member 20 is pivoted downward about the pivot shaft part 21 to maintain the end of the finger part 22 in contact with the finger part 31 of the finger plate member 30. Thus, it is possible to deal with the height variation so that vehicles smoothly can pass. When the other deck slab 2 is moved higher than the one deck slab 1, the hinge finger plate member 20 is pivoted upward about the pivot shaft part 21 to maintain the end of the finger part 22 in contact with the finger plate member 30, thereby dealing with the height variation.
[36] As described above, in the earthquake-resistant expansion joint according to an exemplary embodiment of the present invention, when the deck slabs 1 and 2 are moved in an X-axis direction as a longitudinal direction, in a Y-axis direction as a lateral direction, and in a Z-axis direction as a vertical direction of the bridge due to earthquakes, the overlapping length between the hinge finger part 22 and the finger part 31 is varied, the hinge finger plate member 20 and the finger plate member 30 are
slid in the Y-axis direction, or the hinge finger plate member 20 is pivoted about the pivot shaft part 21, thereby dealing with the earthquake problems.
[37] In addition, the sliding plate 52 of the rubber waterproof member 50 is slid along the inner guide rail 53 or the wrinkled part of the rubber waterproof plate 51 is deformed to deal with the earthquake problems, thereby preventing intrusion of foreign substances. Further, since the outer guide rail 54 is fixed by an adhesive agent, its installation and dismantlement can be readily performed.
[38] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.
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