WO2007021078A1

WO2007021078A1 - Replaceable drainage device of expansion joint

Info

Publication number: WO2007021078A1
Application number: PCT/KR2006/002886
Authority: WO
Inventors: Jong-Su Park
Original assignee: Jong-Su Park
Priority date: 2005-08-19
Filing date: 2006-07-21
Publication date: 2007-02-22

Abstract

Disclosed is a replaceable drainage device of an expansion joint. Fasteners are fitted into fixed bearings installed on opposite sides of an expansion space between slabs or on bottom surfaces of the slabs, and an expansion member is coupled to the fasteners in the expansion space in a 'U' shape. Thereby, a waterproofing function is remarkably improved by preventing water from leaking from a coupled part of the expansion member and the fixed bearings, and a bridge is allowed to maintain durability. When the expansion member should be replaced due to deterioration, only the expansion member is pushed into or pulled from the fixed bearings on one side of the bridge. Thereby, the replacement work is easily performed, and the maintenance and management of the bridge are economically preformed. To this end, the expansion joint's replaceable drainage device, which is installed between upper slabs of a bridge, is characterized in that: a pair of fixed bearings having fixing recesses are buried in the slabs on opposite sides of the slabs; a fastener is fitted into each fixing recess; opposite ends of an expansion member are coupled into the fasteners, respectively; and the expansion member is installed in an expansion space between the slabs in a 'U' shape, thereby preventing leakage of water.

Description

Description REPLACEABLE DRAINAGE DEVICE OF EXPANSION JOINT

Technical Field

[1] The present invention relates to a replaceable drainage device of an expansion joint, and more particularly to a replaceable drainage device of an expansion joint, in which fasteners are fitted into fixed bearings installed on opposite sides of an expansion space between slabs or on bottom surfaces of the slabs, and an expansion member is coupled to the fasteners in the expansion space in a "U" shape, thereby remarkably improving a waterproofing function by preventing water from leaking from a coupled part of the expansion member and the fixed bearings, as well as maintaining durability of a bridge; in which, when the expansion member should be replaced due to deterioration, only the expansion member is pushed into or pulled from the fixed bearings on one side of the bridge, thereby easily performing the replacement work, and economically carrying out maintenance and management of the bridge; and in which core cables are installed in the fasteners, thereby stably sustaining a load of the expansion member. Background Art

[2] In general, an expansion space between slabs serves not only to accept expansion or contraction of the slab which is caused by a change of temperature, dry shrinkage, a creep, etc., but also prevent vibration from being directly transmitted between the slabs.

[3] An expansion joint system installed in the space between slabs is used to prevent the leakage of water to maintain durability of a structure. In most structures, the water leakage occurs, and the resulting durability of the structure is damaged. As a result, the huge cost is involved in maintenance.

[4] This expansion joint system is installed to a narrow space called the expansion space between slabs. As such, easy replacement acts as a crux, and simultaneously a solution capable of preventing the leakage of water is required.

[5] Meanwhile, a water leakage path in a conventional expansion joint system will be described. First, in the case of a highway bridge, as in FIG. 1, cracks occur between existing concrete and newly poured concrete, or between an expansion member 22 and a concrete slab 8. The water leakage occurs between these cracks.

[6] Further, in the case of a railway bridge, as in FIG. 2, a waterproofing elastic joint seal 7 installed between slabs 8 is degraded in adhesive function with the lapse of time. Hence, a gap occurs between the elastic joint seal 7 and the slabs 8, so that the water leakage occurs.

[7] Thus, when the conventional expansion joint system is newly installed, a steel plate 2 is welded to the expansion member 22, and then the steel plate 2 and the expansion member 22 are fastened by bolt-and-nuts 3. When the water leakage occurs at the fastened points of the bolt-and-nuts 3 due to rupture and deterioration of the expansion member 22, only a waterproof cannot be separately replaced without removal of the expansion joint system located above the waterproof due to narrowness between a lower structure 6 and an expansion space, so that huge cost is required. Furthermore, when repair is not carried out in time, this exerts an influence on the structure.

[8] Further, when a water leakage prevention member is partly installed in the expansion space and replacement resulting from the deterioration is carried out, all upper facilities should be dismantled and removed due to the narrowness between a lower structure 6 and an expansion space. As a result, much replacement expense is required.

[9] In addition, a separate reinforcement is not installed to the expansion member 22, so that the expansion member 22 is easily deformed by a small load. Disclosure of Invention Technical Problem

[10] Therefore, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a replaceable drainage device of an expansion joint, in which fasteners are fitted into fixed bearings installed on opposite sides of an expansion space between slabs or on bottom surfaces of the slabs, and an expansion member is coupled to the fasteners in the expansion space in a "U" shape, thereby remarkably improving a waterproofing function by preventing water from leaking from a coupled part of the expansion member and the fixed bearings, as well as maintaining durability of a bridge.

[11] It is another object of the present invention to provide a replaceable drainage device of an expansion joint, in which, when the expansion member should be replaced due to deterioration, only the expansion member is pushed into or pulled from the fixed bearings on one side of the bridge, thereby easily performing the replacement work, and economically carrying out maintenance and management of the bridge.

[12] It is yet another object of the present invention to provide a replaceable drainage device of an expansion joint, in which core cables are installed in the fasteners, thereby stably sustaining a load of the expansion member. Technical Solution

[13] According to an aspect of the present invention, there is provided a replaceable drainage device 2 of an expansion joint which is installed between upper slabs 19 of a bridge, characterized in that a pair of fixed bearings 4 having fixing recesses 6 are buried in the slabs 19 on opposite sides of the slabs 19, a fastener 11 is fitted into each fixing recess 6, opposite ends of an expansion member 8 are coupled into the fasteners 11 respectively, and the expansion member 8 is installed in an expansion space between the slabs 19 in a "U" shape, thereby preventing leakage of water. [14] According to another aspect of the present invention, there is provided a replaceable drainage device of an expansion joint, which has fixed bearings 84 buried in slabs 89 on opposite sides of the slabs 89, finger plates 102 or a cover plate 87 installed on the fixed bearings 84, fasteners 81 removably coupled to the fixed bearings 84, and an expansion member 88 having upper ends coupled to the fasteners 81 and installed in an expansion space between the slabs 89 in a "U" shape, characterized in that an elastic joint seal 108 is installed between the slabs 89 and has opposite ends fitted into the fixed bearings 84.

Advantageous Effects

[15] According to the present invention, the fasteners are fitted into the fixed bearings installed on opposite sides of the expansion space between the slabs or on bottom surfaces of the slabs, and the expansion member is coupled to the fasteners in the expansion space in a "U" shape, so that it is possible to remarkably improve a waterproofing function by preventing water from leaking from a coupled part of the expansion member and the fixed bearings, as well as to maintain durability of a bridge.

[16] Further, when the expansion member should be replaced due to deterioration, only the expansion member is pushed into or pulled from the fixed bearings on one side of the bridge, so that it is possible to easily perform the replacement work, as well as economically carry out maintenance and management of the bridge.

[17] In addition, core cables are installed in the fasteners, so that it is possible to stably sustain a load of the expansion member. Brief Description of the Drawings

[18] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[19] FIG. 1 is a front view illustrating a state where a conventional expansion joint system employing a rubber is installed on slabs;

[20] FIG. 2 is a front view illustrating a state where a conventional expansion joint system employing an internal joint seal is installed in an expansion space between slabs;

[21] FIG. 3 is a front view illustrating a replaceable drainage device of an expansion joint in accordance with a first embodiment of the present invention;

[22] FIG. 4 is a front view illustrating a state where an expansion joint's replaceable drainage device is installed in an expansion space between slabs in accordance with a first embodiment of the present invention; [23] FIG. 5 is a perspective view illustrating an expansion joint's replaceable drainage device according to a first embodiment of the present invention; [24] FIG. 6 is an exploded perspective view illustrating an expansion joint's replaceable drainage device according to a first embodiment of the present invention; [25] FIG. 7 is a front view illustrating an expansion joint's replaceable drainage device according to a second embodiment of the present invention; [26] FIG. 8 is a front view illustrating an expansion joint's replaceable drainage device according to a third embodiment of the present invention; [27] FIG. 9 is a front view illustrating an expansion joint's replaceable drainage device according to a fourth embodiment of the present invention; [28] FIG. 10 is a front view illustrating an expansion joint's replaceable drainage device according to a fifth embodiment of the present invention; [29] FIG. 11 is a view illustrating a state where an expansion joint's replaceable drainage device is installed on slabs for a roadway in accordance with a sixth embodiment of the present invention; [30] FIG. 12 is an exploded perspective view of a fastener in accordance with a sixth embodiment of the present invention; [31] FIG. 13 is a view illustrating a state where an expansion joint's replaceable drainage device is installed on slabs for a railway in accordance with a sixth embodiment of the present invention; [32] FIG. 14 is an exploded perspective view illustrating an expansion joint's replaceable drainage device according to a seventh embodiment of the present invention; [33] FIG. 15 is an exploded perspective view illustrating an expansion joint's replaceable drainage device according to an eighth embodiment of the present invention; [34] FIG. 16 is a partial sectional view illustrating an assembled state of an expansion joint's replaceable drainage device according to a ninth embodiment of the present invention; [35] FIG. 17 is a partial sectional view illustrating an assembled state of an expansion joint's replaceable drainage device according to a tenth embodiment of the present invention; [36] FIG. 18 is a partial sectional view illustrating an assembled state of an expansion joint's replaceable drainage device according to an eleventh embodiment of the present invention; and [37] FIG. 19 is a partial sectional view illustrating an assembled state of an expansion joint's replaceable drainage device according to a twelfth embodiment of the present invention. Best Mode for Carrying Out the Invention

[38] Reference will now be made in detail to the preferred embodiments of the present invention.

[39] A replaceable drainage device 2 of an expansion joint which is installed between upper slabs 19 of a bridge, is characterized in that a pair of fixed bearings 4 having a fixing recess 6 on a side of each slab 19 are buried, a fastener 11 is fitted into each fixing recess 6, opposite ends of an expansion member 8 are coupled into the fasteners 11 respectively, and the expansion member 8 is installed in an expansion space between the slabs 19 in a "U" shape, thereby preventing leakage of water.

[40] Further, the fixing recess 6 of each fixed bearing 4 may have any one of a circular shape, a square shape, a rectangular shape, an "D" shape, and a "

" shape, and each of the fixed bearings 4 may be formed of a steel having high durability.

[41] Further, the pair of fixed bearings 4 having the fixing recesses 6 may be buried in bottom surfaces of the slabs 19, respectively.

[42] Further, the expansion member 8 may be formed of rubber and have at least one reinforcement 24 inserted therein so as to secure durability.

[43] Further, the expansion member 8 may be formed of a steel plate.

[44] Also, each of the fixed bearings 4 and fasteners 11 may be extruded with aluminum.

[45] Further, each of the fasteners 11 may be coupled with the expansion member 8 by bolts 21 and nuts 22.

[46] Further, the expansion member 8 may be rolled into the fasteners 11, and pressed.

[47] Further, the expansion member 8 may be pressed to the fasteners 11 at high temperature.

[48] Also, the slabs 19 may be installed thereon by a cover plate 27 so as to prevent foreign materials from falling down, and the cover plate 27 may be extruded with aluminum.

[49] A replaceable drainage device of an expansion joint, which has fixed bearings 84 buried in slabs 89 on opposite sides of the slabs 89, finger plates 102 or a cover plate 87 installed on the fixed bearings 84, fasteners 81 removably coupled to the fixed bearings 84, and an expansion member 88 having upper ends coupled to the fasteners 81 and installed in an expansion space between the slabs 89 in a "U" shape, is characterized in that an elastic joint seal 108 is installed between the slabs 89 and has opposite ends fitted into the fixed bearings 84.

[50] Meanwhile, an expansion joint's replaceable drainage device 2 according to a first embodiment of the present invention will be described with reference to FIGS. 3 through 6. First, each fixed bearing 4 is formed of a hard steel, and each fixing recess 6 has any one of various shapes such as "

" and "

" Each fastener 11, which fixes an expansion member 8, has the same shape as that of the fixing recess 6, and is adapted to be replaceable.

[51] Especially, in a new bridge, according to each embodiment, stud bolts 15 are each welded to a rear surface of each fixed bearing 4, and then to a reinforcing bar 16 in a slab 19.

[52] In an old bridge, each fixed bearing 4 having the fixing recess 6 can be fixed to a lower portion or a block-out or concrete-free upper portion of the slab 19.

[53] The expansion member 8 and the fastener 11 are fastened by bolts 21 and nuts 22 or rivets. The fastener 11 is made in a shape similar to the fixing recess 6, so that it can be subjected to insertion, fixing, and replacement.

[54] The expansion member 8 is formed of a waterproof such as rubber, and has reinforcements 24 embedded therein so as to withstand a load caused by deposition of foreign materials. Further, the expansion member 8 runs without a seam, thereby preventing any leakage of water flowing into an expansion space between the slabs 19.

[55] To be more specific about the expansion joint's replaceable drainage device constructed in this manner, first, the fixed bearing 4 is installed to a side of the slab 19 by burial or protrusion. A front surface of the fixed bearing 4 is formed with the fixing recess 6 in a longitudinal direction. A plurality of stud bolts 15 welded to the reinforcing bars 16 in the slab are welded to the rear surface of the fixed bearing 4.

[56] The fastener 11 having a supporting function is fitted into the fixing recess 6. One end of the expansion member 8 having a water leakage prevention function is coupled to the fastener 11. At this time, the fastener 11 fastens the end of the expansion member 8 by the bolts 21 and nuts 22, so that the expansion member 8 is fixed between the slabs 19 in a "U" shape.

[57] Alternatively, the expansion member 8 may be fitted into the fastener 11, and then pressed and fixed under high temperature.

[58] The expansion member 8 installed in this manner is formed of rubber or steel plate.

[59] The fixed bearing 4 and the fastener 11 are formed of steel or aluminum. Particularly, in the case of aluminum, they are formed by extrusion.

[60] Subsequently, a cover plate 27 is installed on the slab 19, thereby preventing foreign materials from falling down. Here, the cover plate 27 is formed of aluminum by extrusion. [61] A process of installing the expansion joint's replaceable drainage device, constructed as described above, according to a first embodiment of the present invention will be described below.

[62] First, in order to prepare the slab 19 according to a first embodiment of the present invention, the reinforcing bars 16 are arranged in a form. Then, the fixed bearing 4 is adjusted to a lower position of the expansion space between the slabs 19, as in FIG. 3. The stud bolts 15 attached to the rear surface of the fixed bearing 4 are welded to the reinforcing bars 16. The form is filled with concrete.

[63] Then, the concrete is cured, and then separated from the form. As illustrated in FIG.

4, in order to insert and fix the expansion member 8 into and to the fixing recess 6 of the fixed bearing 4, the ends of the expansion member 8 are fitted into a pair of fasteners 11, respectively. Then, the fitted portions are bored and fastened by the bolts 21 and nuts 22. Afterwards, the fasteners 11 are pushed into the fixing recesses 6 of the fixed bearings 4, and thereby the expansion member 8 is installed between the slabs 19 in a "U" shape.

[64] Therefore, the expansion member 8 installed in this way completely prevents water leaking from the expansion space between the slabs from flowing into and damaging a super structure of the bridge.

[65] Meanwhile, an expansion joint's replaceable drainage device 32 according to a second embodiment of the present invention will be described with reference to FIG. 7. First, each fixed bearing 34 and each fixing recess 36 constituting the expansion joint's replaceable drainage device 32 are formed in a circular, concave shape, and each fastener 31 is formed in a circular, convex shape such that it can be inserted into and hanged from each fixing recess 36.

[66] Accordingly, each expansion member 38 is coupled to each pair of fixed bearings

34, and thereby installed between the slabs 39 in a "U" shape.

[67] A process of installing the expansion joint's replaceable drainage device, constructed as described above, according to a second embodiment of the present invention will be described below. First, the fasteners 31 constituting the expansion joint's replaceable drainage device 32 to be replaced are pushed into the fixing recesses 36, so that each expansion member 38 is installed between the slabs 39 in a "U" shape.

[68] Meanwhile, an expansion joint's replaceable drainage device 42 according to a third embodiment of the present invention will be described with reference to FIG. 8. First, a fixing recess 46 of each fixed bearing 44 constituting the expansion joint's replaceable drainage device 42 is formed in an "D" shape, and each fastener 41 is formed in an "D" shape such that it can be inserted into and hanged from each fixing recess 46.

[69] Accordingly, each expansion member 48 is coupled to each pair of fixed bearings

44, and thereby installed between the slabs 49 in a "U" shape. [70] A process of installing the expansion joint's replaceable drainage device, constructed as described above, according to a third embodiment of the present invent ion will be described below. First, the fasteners 41 constituting the expansion joint's replaceable drainage device 42 to be replaced are pushed into the fixing recesses 46, so that each expansion member 48 is installed between the slabs 49 in a "U" shape.

[71] Meanwhile, an expansion joint's replaceable drainage device 52 according to a fourth embodiment of the present invention will be described with reference to FIG. 9. First, a fixing recess 56 of each fixed bearing 54 constituting the expansion joint's replaceable drainage device 52 is formed in a "

" shape, and each fastener 51 is formed in a "

" shape such that it can be inserted into and hanged from each fixing recess 56.

[72] Accordingly, each expansion member 58 is coupled to each pair of fixed bearings

54, and thereby installed between the slabs 59 in a "U" shape.

[73] A process of installing the expansion joint's replaceable drainage device, constructed as described above, according to a fourth embodiment of the present invention will be described below. First, the fasteners 51 constituting the expansion joint's replaceable drainage device 52 to be replaced are pushed into the fixing recesses 56, so that each expansion member 58 is installed between the slabs 59 in a "U" shape.

[74] Meanwhile, an expansion joint's replaceable drainage device 62 according to a fifth embodiment of the present invention will be described with reference to FIG. 10. First, a fixing recess 66 of each fixed bearing 64 constituting the expansion joint's replaceable drainage device 62 is formed in a square or rectangular shape, and each fastener 61 is bent in a multiple step such that it can be inserted into and hanged from each fixing recess 66.

[75] Accordingly, each expansion member 68 is coupled to each pair of fixed bearings

64, and thereby installed between the slabs 69 in a "U" shape.

[76] A process of installing the expansion joint's replaceable drainage device, constructed as described above, according to a fifth embodiment of the present invention will be described below. First, the fasteners 61 constituting the expansion joint's replaceable drainage device 62 to be replaced are pushed into the fixing recesses 66, so that each expansion member 68 is installed between the slabs 69 in a "U" shape.

[77] Meanwhile, an expansion joint's replaceable drainage device 82 according to a sixth embodiment of the present invention will be described with reference to FIG. 11. First, the expansion joint's replaceable drainage device 82 is installed between slabs 89 constituting a roadway bridge, and serves to prevent dirt or rainwater falling down above the slabs 89 from falling toward a bridge seat device or concrete not shown.

[78] Accordingly, the bridge seat device or concrete is prevented from corrosion by the expansion joint's replaceable drainage device 82, so that it can continuously maintain its original function.

[79] The expansion joint's replaceable drainage device 82 is provided with a pair of fixed bearings 84 buried in or protruding from a side of each slab 89 formed of reinforcing bars and concrete. Each of the fixed bearings 84 is provided with a rail 90 arranged and buried along the side of the slab 89 in a transverse direction. The rail 90 is formed therein with a fixing recess 86 in a longitudinal direction. The fixing recess 86 is formed on a lower end thereof with guide slot 94 in a longitudinal direction.

[80] The rail 90 is formed with a hanging recess 99 on an upper end thereof, an upper hanger 97 on one side of the upper end thereof, and at least one boss 100 in the middle between the hanging recess 99 and the upper hanger 97, wherein the upper hanger 97 integrally extends up to a distance reaching the hanging recess 99 along the side of the slab 89 and is buried, and the boss 100 is integrally formed and buried in the slab 89.

[81] A pair of finger plates 102 are engaged with each other while being disposed on the upper hangers 97, and preferably, on upper ends of the opposite slabs 89. Each finger plate 102 is on one side thereof fastened to the boss 10 by a bolt 91. Thereby, the finger plates 102 are fixedly installed to the slabs 89.

[82] At this time, the finger plates 102 serve to allow any vehicle to smoothly go between the slabs 89, and simultaneously to prevent foreign materials or rainwater from directly escaping downside.

[83] Subsequently, each of the rails 90 is formed on a rear surface thereof with lugs 103 along a longitudinal direction. The lugs 103 are coupled with bolts 101, which is welded to reinforcing bars 85 arranged in the slab 89.

[84] Each of the rails 90 is integrally formed with a lower hanger 105, which extends from a lower end of each rail and is buried in one side of each slab 89.

[85] The fixed bearings 84 constructed in this way are fixed on the sides of the opposite slabs 89.

[86] An elastic joint seal 108 is installed between the slabs 89. The elastic joint seal 108 serves to self-absorb all structural behaviors (compression, tension, shear, flexure, vibration, twist, etc.) of the structure, exert an expansion function as well as a waterproofing function with any change in temperature, and semi-permanently sustain durability of the structure.

[87] This elastic joint seal 108 includes a rubber member (EVAZOTE), which is widely sold and used.

[88] The elastic joint seal 108 is formed in a honeycomb shape at an intermediate portion thereof, and has opposite ends fitted into the hanging recesses 99 formed at the upper portions of the rails 90. Thereby, the elastic joint seal 108 is fixed between the slabs 89.

[89] Unlike the foregoing, concrete may be poured without fitting the elastic joint seal

108 into the hanging recesses 99, and thereby the upper portion of the fixed bearing 84 may be buried in the slab 89.

[90] Next, in order to prevent dirt or rainwater from leaking from the expansion space between the slabs 89, an expansion member 88 is installed in a "U" shape. Fasteners 81 are fitted into the fixing recesses 86 of the rails 90 on opposite sides of the upper end of the expansion member 88, respectively. The fasteners 81 is provided with pads 110, which are disposed on the opposite sides of the upper end of the expansion member 88 and fixed by rivets 114. Each of the pads 110 is fitted with a cover 112.

[91] As illustrated in FIG. 12, the covers 112, the pads 110, and the expansion member

88, which are constructed in this way, are past through and riveted by a plurality of rivets 116, which are disposed at regular intervals.

[92] Each cover 112 is provided with a core cable 118, which is fitted in a longitudinal direction on an upper portion of the cover 112 and stably supports a load of the expansion member 88.

[93] Each cover 112 constructed in this way is formed of any one of rubber, plastic, and metal, and each core cable 118 is formed of a metal such as a steel.

[94] As illustrated in FIG. 13, unlike the foregoing, when the expansion joint's replaceable drainage device 82 is installed for a railway bridge, a cover plate 87 is installed on the opposite slabs 89 so as to prevent foreign materials or rainwater from directly falling down. Bolts 91 are coupled on one side of the cover plate 87 and fastened to the bosses 100 of the upper hanger 97.

[95] Accordingly, the cover plate 87 is fixed on the top surfaces of the slabs 89.

[96] Processes of assembling and disassembling the expansion joint's replaceable drainage device, constructed as described above, according to a sixth embodiment of the present invention will be described below.

[97] First, in order to prepare the slab 89, the reinforcing bars 85 are arranged in a form.

Then, the bolts 101 coupled to the lugs 103 of the fixed bearing 84 are welded to the reinforcing bars 85. The form is filled with concrete, and thereby the fixed bearing 84 is buried in the slab 89.

[98] When the slab 89 prepared in this way is installed above a pier of the railway bridge, the expansion member 88, which prevents foreign materials or rainwater from falling toward the bridge seat device or reinforced concrete, is installed in the expansion space between the slabs 89. At this time, the expansion member 88 is pushed on one side of the fixed bearing 84. Thereby, the expansion member 88 is installed in the expansion space between the slabs 89. [99] Therefore, the fasteners 81 installed on the opposite upper ends of the expansion member 88 are fitted into the fixing recesses 86 of the rails 90 constituting the fixed bearings 84. The opposite ends of the expansion member 88 are inserted into the guide slots 94, and the remaining part of the expansion member 88 is located outside. Thereby, the expansion member 88 is installed between the slabs 89 in a "U" shape.

[100] Thereafter, the elastic joint seal 108 is disposed between the slabs 89, and the opposite ends of the elastic joint seal 108 are fitted into the hanging recesses 99 of the fixed bearings 84. The pair of finger plates 102 is disposed on the elastic joint seal 108 so as to be engaged with each other. The bolts 91 are coupled on one side of each finger plate 102, and fastened to the bosses 100 located at the upper hangers 97.

[101] Thereby, the finger plates 102 are installed across the expansion space between the slabs 89 in engagement with each other.

[102] In this state, when rainwater or foreign materials fall down through a gap between the finger plates 102, the elastic joint seal 108 primarily blocks the rainwater or foreign materials. Then, the rainwater or foreign materials fall toward the expansion member 88. Due to the expansion member 88, the rainwater or foreign materials moves in a transverse direction and thereby fall down the slabs 89 without directly falling toward the concrete or bridge seat device.

[103] As a result, the bridge seat device or concrete is prevented from corrosion because it is not directly contacted with the rainwater or foreign materials, so that it can continuously maintain its original function.

[104] Moreover, the rails 90 are provided with the guide slots 94 in a downward direction so as to fit the opposite ends of the expansion member 88, and formed therein with the fixing recesses 86 coupled with the fasteners 81 installed on opposite ends of the expansion member 88. Hence, coupled portions of the expansion member 88 and the fixed bearings 84 are sealed, thereby preventing the rainwater or foreign materials from escaping toward the bridge seat device or concrete. Accordingly, the waterproofing function of the expansion joint's replaceable drainage device 82 is improved. Further, the expansion member 88 can be pushed into or withdrawn from the fixed bearings 84, so that assembling and disassembling works are easy.

[105] As described above, when the rainwater or foreign materials fall down from the upside, the load of the expansion member 88 increases. At this time, the fixed bearings 84 primarily support the load of the expansion member 88, so that the expansion member 88 can be prevented from deformation. Furthermore, the core cables 118 installed to the fixed bearings 84 support the load of the expansion member 88, so that the expansion member 88 can be prevented from deformation.

[106] In this state, when a vehicle goes on the slabs 89, there occurs vibration. At this time, the elastic joint seal 108 self-absorbs the vibration transmitted between the slabs 89, thereby allowing durability of the structure to be continuously sustained.

[107] Meanwhile, when the expansion joint's replaceable drainage device 82 is used for a predetermined period of time, it is corroded by rainwater, dirt and the like. Hence, the expansion joint's replaceable drainage device 82 should be replaced. To this end, the bolts are unfastened to separate the finger plates 102, and then the elastic joint seal 108 is separated from the hanging recesses 99.

[108] Subsequently, when the expansion member 88 is pulled along the side of the slab 89 in a transverse direction, the fasteners 81 move along the fixing recesses 86, and simultaneously the opposite ends of the expansion member 88 move along the guide slots 94. Thereby, the expansion member 88 comes out of the fixed bearings 84 and is separated.

[109] Afterwards, similarly to the foregoing, new expansion member 88, elastic joint seal

108, and finger plates 102, etc. are installed to the slabs 89, thereby the replacement work is completed.

[110] Further, unlike the foregoing, when the expansion joint's replaceable drainage device 82 is installed for a railway bridge, the cover plate 87 is installed on the opposite slabs 89. The bolts 91 are coupled on one side of the cover plate 87 and fastened to the bosses 100 of the upper hanger 97, so that the cover plate 87 is fixed on the slabs 89.

[I l l] After the cover plate 87 is installed in this way, similarly to the foregoing, the remaining installation work is preformed.

[112] Meanwhile, unlike the foregoing, an expansion joint's replaceable drainage device

122 according to a seventh embodiment of the present invention will be described with reference to FIG. 14. First, each fixed bearing 124 is formed to have a gradient R curved upward in the middle thereof. Thereby, rails 120, fixing recesses 126, hanging recesses 129, upper hangers 127, lugs 123, lower hangers 125, etc. have substantially the same gradient R on the whole.

[113] Fasteners 121 fitted into the fixing recesses 126 of the fixed bearings 124 are formed to have the same gradient R curved upward as in the fixed bearings 124.

[114] The expansion joint's replaceable drainage device 122, constructed as described above, according to a seventh embodiment of the present invention has the same assembling and disassembling processes as those of the sixth embodiment.

[115] In other words, an expansion member 128 is pushed and coupled, or pulled and separated on one side of the fixed bearing 124 having the gradient R. The expansion member 128 is installed, thereby preventing the water leakage.

[116] Meanwhile, unlike the foregoing, an expansion joint's replaceable drainage device

132 according to a eighth embodiment of the present invention will be described with reference to FIG. 15. First, each fastener 131 is installed to an expansion member 138 without a gradient R in such a manner that each fastener 131 is divided into a plurality of fastener segments, and then fastener segments are installed at regular intervals on each upper end of an expansion member 138.

[117] Here, although each fastener 131 has the gradient R, a distance between the neighboring fastener segments compensates for the gradient R given to an fixing recess 136 of each fixed bearing 134, because the plurality of fastener segments divided from each fastener 131 are installed at regular intervals.

[118] Therefore, the fasteners formed in this way are easily fitted into and separated from the fixing recesses 136 having the gradient R.

[119] The expansion joint's replaceable drainage device 132, constructed as described above, according to an eighth embodiment of the present invention has the same assembling and disassembling processes as those of the sixth embodiment.

[120] In other words, the expansion member 138 is pushed and coupled, or pulled and separated on one side of the fixed bearing 134 having the gradient R. The expansion member 138 is installed, thereby preventing the water leakage.

[121] Meanwhile, an expansion joint's replaceable drainage device 142 according to a ninth embodiment of the present invention will be described with reference to FIG. 16. First, the expansion joint's replaceable drainage device 142 is comprised of fixed bearings 144 and fasteners 141. Each of the fixed bearings 144 is disposed along a side of each slab 89 in a transverse direction, and buried. Each fixed bearing 144 has a rail 150 opening a lower portion of one side thereof, and the rails 150 are formed with fixing recesses 156 into which the fasteners 141 are inserted, and supporting brackets 155 protruding in opposite directions in the middle of each inner surface thereof.

[122] Similarly to the foregoing, each of the rails 150 is formed with a hanging recess 149 and an upper hanger 147 on an upper end thereof, a lower hanger 145 on a lower end thereof, and lugs 143 coupled with bolts 151 on a rear surface thereof.

[123] Further, the fasteners 141 are provided with pads 140 disposed on opposite upper ends of an expansion member 148, and each pad 140 is integrally formed with protrusions 159 on opposite outer surfaces thereof, wherein the protrusions 159 are hanged from the supporting brackets 155.

[124] The expansion member 148 is coupled with each pad 140, and particularly, with the pad 140 having the protrusions 159 and the remaining part of the pad 140 by a plurality of rivets 146 disposed at regular intervals. Each protrusion 152 has a core cable 158 installed in a longitudinal direction so as to support a load of the expansion member 148.

[125] Processes of assembling and disassembling the expansion joint's replaceable drainage device 142, constructed as described above, according to a ninth embodiment of the present invention will be described below. [126] First, when the fasteners 141 are pushed on one side of the rail 150 of each fixed bearing 144, the protrusions 159 of each fastener 141 are located on the support brackets 155, and simultaneously the opposite upper ends of the expansion member 148 are located in the rails 150.

[127] In this state, when the rainwater or foreign materials fall down from the upside of the slabs 89, the load of the expansion member 148 increases. At this time, the fixed bearings 144 primarily support the load of the expansion member 148, and the core cables 118 embedded in the protrusions 159 secondarily support the load of the expansion member 148.

[128] Accordingly, the expansion member 148 can be prevented from deformation.

[129] When the expansion member 148 is pulled along the side of the slab 89 in a transverse direction in order to separate it from the fixed bearings 144, the fasteners 141 move along the supporting brackets 155, and simultaneously the opposite ends of the expansion member 148 move along the supporting brackets 155.

[130] Accordingly, the expansion member 148 is separated from the fixed bearings 144.

[131] Meanwhile, an expansion joint's replaceable drainage device 162 according to a tenth embodiment of the present invention will be described with reference to FIG. 17. First, the expansion joint's replaceable drainage device 162 is comprised of fixed bearings 164 and fasteners 161. Each of the fixed bearings 164 is disposed along a side of each slab 89 in a transverse direction, and buried. Each fixed bearing 164 has a rail 170 opening a lower portion of one side thereof, and each rail 170 is formed with a fixing recess 176 into which the fastener 161 is inserted, and a holder 175 bent inward and the upward in the middle of one side thereof.

[132] Similarly to the foregoing, each of the rails 170 is formed with a hanging recess 169 and an upper hanger 167 on an upper end thereof, a lower hanger 165 on a lower end thereof, and lugs 163 coupled with bolts 171 on a rear surface thereof.

[133] Further, the fasteners 161 are provided with pads 160 and hooks 173 disposed on opposite upper ends of an expansion member 168. The expansion member 148 is coupled with the pads 160 and hooks 173 by a plurality of rivets 166 disposed at regular intervals. Each hook 173 has a core cable 178 installed in a longitudinal direction so as to support a load of the expansion member 168.

[134] Processes of assembling and disassembling the expansion joint's replaceable drainage device 162, constructed as described above, according to a tenth embodiment of the present invention will be described below.

[135] First, when the fasteners 161 are pushed on one side of the rail 170 of each fixed bearing 164, the hooks 173 of the fasteners 161 are fitted into the holders 175, and simultaneously the opposite upper ends of the expansion member 168 are located in the rails 170. [136] In this state, when the rainwater or foreign materials fall down from the upside of the slabs 89, the load of the expansion member 168 increases. At this time, the fixed bearings 164 primarily support the load of the expansion member 148, and the core cables 118 embedded in the hooks 173 secondarily support the load of the expansion member 168.

[137] Accordingly, the expansion member 168 can be prevented from deformation.

[138] When the expansion member 168 is pulled along the side of the slab 89 in a transverse direction in order to separate it from the fixed bearings 164, the fasteners 161 move along the holders 175, and simultaneously the opposite ends of the expansion member 168 move along lower inner sides of the rails 170.

[139] Accordingly, the expansion member 168 is separated from the fixed bearings 164.

[140] Meanwhile, an expansion joint's replaceable drainage device 182 according to an eleventh embodiment of the present invention will be described with reference to FIG. 18. First, the expansion joint's replaceable drainage device 182 is comprised of fixed bearings 184 and fasteners 181. Each of the fixed bearings 184 is disposed along a side of each slab 89 in a transverse direction, and buried. Each fixed bearing 184 has a rail 190 opening a lower portion of one side thereof. Each rail 190 is formed on an inner side thereof with a circular fixing recess 186 in a longitudinal direction. Each fixing recess 186 is integrally formed with a guide slot 194 on a lower portion thereof so as to insert an expansion member 188.

[141] Similarly to the foregoing, each of the rails 190 is formed with a hanging recess 189 and an upper hanger 187 on an upper end thereof, a lower hanger 185 on a lower end thereof, and lugs 183 coupled with bolts 191 on a rear surface thereof.

[142] Further, the fasteners 181 are provided with circular rods 199, which are disposed on opposite upper ends of the expansion member 188 and integrally formed with the expansion member 188. Each of the rods 199 is provided therein with a core cable 198, which is installed in a longitudinal direction and supports a load of the expansion member 188.

[143] Processes of assembling and disassembling the expansion joint's replaceable drainage device 182, constructed as described above, according to an eleventh embodiment of the present invention will be described below.

[144] First, when the fasteners 181 are pushed on one side of the rail 190 of each fixed bearing 184, the rods 199 of the fasteners 181 are fitted into the fixing recesses 186, and simultaneously the opposite upper ends of the expansion member 188 are located in the guide slots 194 formed on the lower portions of the rails 190.

[145] In this state, when the rainwater or foreign materials fall down from the upside of the slabs 89, a load of the expansion member 188 increases. At this time, the rods 199 and core cables 198 support the load of the expansion member 188. [146] Accordingly, the expansion member 188 can be prevented from deformation.

[147] When the expansion member 188 is pulled along the side of the slab 89 in a transverse direction in order to separate it from the fixed bearings 184, the fasteners 181 move along the fixing recesses 186, and simultaneously the opposite ends of the expansion member 188 move along the guide slots 194 formed on the lower portions of the rails 190.

[148] Accordingly, the expansion member 188 is separated from the fixed bearings 184.

[149] Meanwhile, an expansion joint's replaceable drainage device 202 according to a twelfth embodiment of the present invention will be described with reference to FIG. 19. First, the expansion joint's replaceable drainage device 202 is comprised of fixed bearings 204 and fasteners 201. Each of the fixed bearings 204 is disposed along a side of each slab 89 in a transverse direction, and buried. Each fixed bearing 204 is provided with a cylindrical rail 210. Each rail 210 is formed in the middle thereof with a circular fixing recess 206 in a longitudinal direction. Each fixing recess 206 communicates with a curved guide slot 214 on a lower portion thereof so as to insert an expansion member 208, wherein the guide slot 214 has one end directed to a side of each rail 210.

[150] Similar to the foregoing, each of the rails 210 is formed with a hanging recess 209 and an upper hanger 207 on an upper end thereof, a lower hanger 205 on a lower end thereof, and lugs 203 coupled with bolts 211 on a rear surface thereof.

[151] Further, the fasteners 201 are provided with circular rods 219, which are disposed on opposite upper ends of the expansion member 208 and integrally formed with the expansion member 208. Each of the rods 219 is provided therein with a core cable 218, which is installed in a longitudinal direction and supports a load of the expansion member 208.

[152] Processes of assembling and disassembling the expansion joint's replaceable drainage device 202, constructed as described above, according to a twelfth embodiment of the present invention will be described below.

[153] First, when the fasteners 201 are pushed on one side of the rail 210 of each fixed bearing 204, the rods 219 of the fasteners 201 are fitted into the fixing recesses 206, and simultaneously the opposite upper ends of the expansion member 208 are located in the guide slots 214 formed on the lower portions of the rails 210.

[154] At this time, the guide slots 214 are curved, thereby holding the opposite upper ends of the expansion member 208 in a curved shape.

[155] In this state, when the rainwater or foreign materials fall down from the upside of the slabs 89, a load of the expansion member 208 increases. At this time, the rods 219 and core cables 218 support the load of the expansion member 208.

[156] Accordingly, the expansion member 208 can be prevented from deformation. [157] When the expansion member 208 is pulled along the side of the slab 89 in a transverse direction in order to separate it from the fixed bearings 204, the fasteners 201 move along the fixing recesses 206, and simultaneously the opposite ends of the expansion member 208 move along the guide slots 214 formed on the lower portions of the rails 210.

[158] Accordingly, the expansion member 208 is separated from the fixed bearings 204.

[159] It can be seen that the expansion joint's replaceable drainage devices 32, 42, 52, 62,

82, 122, 132, 142, 162, 182 and 202, constructed as described above, according to the present invention can be variously designed and modified as described through the first through twelfth embodiments.

[160] Meanwhile, the reference numerals, not described, of the present invention constructed as described above are as follows.

[161] Reference numerals "35" "45" and "65" indicate the stud bolt. Reference numerals

"37" "47" "57" and "67" indicate the cover plate. Reference numeral "130" indicates the rail.

[162] Reference numeral "133" indicates the lug. Reference numeral "135" indicates the lower hanger. Reference numeral " 137" indicates the upper hanger. Reference numeral " 139" indicates the hanging recess. Industrial Applicability

[163] As can be seen from the foregoing, the replaceable drainage device of an expansion joint according to the present invention is installed between upper slabs of a bridge, and prevents leakage of water. Thus, it is used to prevent damage to the durability of a structure.

[164] The replaceable drainage device of an expansion joint can be generally applied to a roadway bridge, a railway bridge, and so on.

[165] While this invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment and the drawings, but, on the contrary, it is intended to cover various modifications and variations within the spirit and scope of the appended claims.

Claims

[1] A replaceable drainage device (2) of an expansion joint which is installed between upper slabs (19) of a bridge, characterized in that: a pair of fixed bearings (4) having fixing recesses (6) are buried in the slabs (19) on opposite sides of the slabs (19); a fastener (11) is fitted into each fixing recess (6); opposite ends of an expansion member (8) are coupled into the fasteners (11), respectively; and the expansion member (8) is installed in an expansion space between the slabs (19) in a "U" shape, thereby preventing leakage of water.

[2] The replaceable drainage device according to claim 1, characterized in that: the fixing recess (6) of each fixed bearing (4) has any one of a circular shape, a square shape, a rectangular shape, an "D" shape, and a "

" shape; and the fixed bearings (4) are each formed of a steel having high durability. [3] The replaceable drainage device according to claim 1, characterized in that the pair of fixed bearings (4) having the fixing recesses (6) are buried in bottom surfaces of the slabs (19), respectively. [4] The replaceable drainage device according to claim 1, characterized in that the expansion member (8) is formed of rubber, and has at least one reinforcement

(24) inserted therein so as to secure durability. [5] The replaceable drainage device according to claim 1, characterized in that the expansion member (8) is formed of a steel plate. [6] The replaceable drainage device according to claim 1 or 3, characterized in that the fixed bearings (4) and the fasteners (11) are each extruded with aluminum. [7] The replaceable drainage device according to claim 1, characterized in that the fasteners (11) are each coupled with the expansion member (8) by bolts (21) and nuts (22). [8] The replaceable drainage device according to claim 1, characterized in that the expansion member (8) is rolled into the fasteners (11), and pressed. [9] The replaceable drainage device according to claim 1, characterized in that: the slabs (19) are installed thereon by a cover plate (27) so as to prevent foreign materials from falling down; and the cover plate (27) is extruded with aluminum. [10] A replaceable drainage device (2) of an expansion joint which is installed in an expansion space between upper slabs (19) of a bridge, characterized in that: a pair of fixed bearings (4) having fixing recesses (6) protrude from opposite sides of the slabs (19); a fastener (11) is fitted into each fixing recess (6); opposite ends of an expansion member (8) are coupled into the fasteners (11), re- spectively; and the expansion member (8) is installed in an expansion space between the slabs (19) in a "U" shape, thereby preventing leakage of water. [11] The replaceable drainage device according to claim 1, characterized in that: the fixed bearings (84) are provided thereon with finger plates (102) or a cover plate (87); the slabs (89) are provided therebetween with an elastic joint seal (108); and the elastic joint seal (108) has opposite ends fitted into the fixed bearings (84). [12] The replaceable drainage device according to claim 11, characterized in that each of the fixed bearings (84) includes: a rail (90) having the fixing recess (86) into which the fastener (81) is fitted; an upper hanger (97) integrally extending from an upper end of the rail (90), and having the finger plate (102) or the cover plate (87) located thereon; at least one boss (100) integrally extending from the upper hanger (97), and fastened with at least one bolt (91) coupled to the finger plate 102 or the cover plate (87); a lower hanger (105) integrally extending from a lower portion of the rail (90); and at least one lug (103) coupled to at least one bolt (101) on a rear surface of the rail (90). [13] The replaceable drainage device according to claim 12, characterized in that each of the fasteners (81) fitted into the fixing recesses (86) includes: a pad (110) coupled to each of opposite upper ends of the expansion member

(88) by rivets (114); a cover (112) fitted therein by the pad (110); and rivets (116) passing through and coupled to the cover (112), the pad (110) and the expansion member (88). [14] The replaceable drainage device according to claim 13, characterized in that the cover (112) has a core cable (118) installed therein. [15] The replaceable drainage device according to claim 14, characterized in that: the cover (112) is formed of any one of rubber, plastic and metal; and the core cable

(118) is formed of metal. [16] The replaceable drainage device according to claim 11, characterized in that: each of the fixed bearings (144) is formed with supporting brackets (155) on opposite inner surfaces thereof, and includes a rail (150) having the fixing recess

(156) into which the fastener (141) is fitted; and each of the fasteners (141) includes: a pair of pads (140) disposed on each of opposite upper ends of the expansion member (148); protrusions (159) integrally formed on opposite outer surfaces of the pads (140), and hanged from the supporting brackets (155); rivets (146) passing through and coupled to the pad (140), the protrusions (159), and the expansion member (148); and a core cable (158) installed in each of the protrusions (159). [17] The replaceable drainage device according to claim 11, characterized in that: each of the fixed bearings (164) is formed with a holder (175) bent inward and upward, and includes a rail (170) having the fixing recess (176) into which the fastener (161) is fitted; and each of the fasteners (161) includes: a pad (160) and hook (173) disposed on each of opposite upper ends of the expansion member (168); rivets (146) passing through and coupled to the pad (160), the expansion member

(168), and the hook (173); and a core cable (178) installed in the hook (173). [18] The replaceable drainage device according to claim 11, characterized in that: each of the fixed bearings (184) having a rail (190) formed with the fixing recess

(186) into which the fastener (181) is fitted; and each of the fasteners (181) includes: a rod (199) integrally formed with the expansion member (188) on each of opposite upper ends of the expansion member (188); and a core cable (198) installed in the rod (199). [19] The replaceable drainage device according to claim 18, characterized in that the rail (210) is provided therein with a guide slot (214) that holds the upper end of the expansion member (208) and communicates with the fixing recess (206) in a curved shape. [20] The replaceable drainage device according to claim 11, characterized in that each of the fixed bearings (124) and fasteners (121) has a gradient R curved upward in the middle thereof. [21] The replaceable drainage device according to claim 11, characterized in that: each of the fixed bearings (134) has a gradient (R) curved upward in the middle thereof; and each of the fasteners (131) is divided into a plurality of fastener segments, which are installed on the upper end of the expansion member (138) at regular intervals.