KR20170061404A - Expansion joint for bridge having leakage protection sturcture - Google Patents
Expansion joint for bridge having leakage protection sturcture Download PDFInfo
- Publication number
- KR20170061404A KR20170061404A KR1020150166378A KR20150166378A KR20170061404A KR 20170061404 A KR20170061404 A KR 20170061404A KR 1020150166378 A KR1020150166378 A KR 1020150166378A KR 20150166378 A KR20150166378 A KR 20150166378A KR 20170061404 A KR20170061404 A KR 20170061404A
- Authority
- KR
- South Korea
- Prior art keywords
- vertical
- pressing member
- bridges
- coupled
- pressing
- Prior art date
Links
- 238000003825 pressing Methods 0.000 claims abstract description 87
- 238000003780 insertion Methods 0.000 claims abstract description 28
- 230000037431 insertion Effects 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000004078 waterproofing Methods 0.000 abstract description 50
- 230000008093 supporting effect Effects 0.000 abstract description 12
- 230000001976 improved effect Effects 0.000 abstract description 10
- 230000002265 prevention Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/062—Joints having intermediate beams
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
Abstract
Disclosed is an expansion joint for a bridge having a waterproof structure. The expansion joint device for a bridge having a water leakage prevention structure according to the present invention comprises a pair of support members each having a vertical end and a horizontal end coupled to the upper end of the vertical end in a horizontal direction, A rubber waterproofing member formed with a stretchable portion in the middle thereof and having opposite ends joined to the respective vertical ends on both sides thereof and a finger plate coupled to the watertight ends of both sides thereof, A mounting member having a plurality of folded support ends so as to form an insertion portion to be coupled to an inner surface of each of the vertical ends; And a pressing member inserted between the inner side surface and the end portion of the vertical end in a state where the end portion of the rubber waterproof member is inserted into the insertion portion and the end portion is brought into close contact with the inner surface of the support end, When the wedge-shaped pressing member is pressed downward by the fastening force of the bolt, the lower end portion of the pressing member is brought into close contact with the supporting end of the pressing plate so that the lower end portion, And airtightness is maintained between the ends so as to prevent water leakage. According to the present invention, since the finger plate presses the pressing member downward by the fastening force generated when the finger plate of the expansion joint device is fastened to the horizontal end of the supporting member, the lower end of the pressing member presses the end of the rubber water- It is possible to provide an effect that the waterproof performance of the expansion joint device can be improved.
Description
The present invention relates to a telescopic joint for bridges having a waterproof structure, and more particularly, to a telescopic joint device for a bridge, which is characterized in that each of the ends of the rubber waterproofing member To an expansion joint device for bridges having a leakage preventing structure capable of tightly coupling the support members on both sides while maintaining airtightness.
Generally, in order to cope with the expansion and contraction of a bridge due to a temperature change, a bridge having a relatively long length is divided into several sections in the longitudinal direction of the bridge, Install the joints.
Thus, the expansion joint device installed between the upper slabs of the bridge prevents damage to the bridge structure which is expanded and contracted according to the temperature change and the load, thereby enabling the vehicle to run smoothly.
Such expansion joints have been developed in various structures. As one example, the telescopic joint device includes a pair of support members arranged with a predetermined gap therebetween so as to face each other and provided with an anchors on the outer side surfaces thereof, and a pair of fingers And a rubber waterproofing member made of a rubber material disposed between the plate and the support members.
The rubber waterproofing member disposed between the two support members may be formed integrally with the support member by vulcanization and adhesion by vulcanization and adhesion depending on the structure or kind of the expansion joint. Or may be coupled to the vertical ends of both support members.
Such a rubber waterproofing member is for preventing rainwater or foreign matter from flowing into the support members on both sides. As a conventional technique, Korean Patent No. 10-0743043 (Announcement: 2007.07.26) discloses a rubber waterproofing member Member.
Such a rubber waterproofing member is a rubber waterproofing member of a telescopic joint which is mounted between bridges and each bridge top plate portion forming an expensive road to prevent intrusion of rainwater or contaminants. The rubber waterproofing member is easy to install and disassemble the rubber waterproofing member A rubber waterproofing plate having a plate shape made of a rubber material and having a hooking ring having an enlarged cross section at both end faces; A sliding plate surrounding the retaining ring of the rubber waterproofing plate to reduce frictional force; An inner guide rail surrounding the sliding plate so as to be slidable and arranged along a lateral direction of the upper plate slave; And an outer guide rail which is connected to and fixes the connection portions of the inner guide rails so as not to cause a step difference and is mounted on the side portions of the bridge upper plate portions facing each other.
Since the rubber waterproofing member of the above-mentioned expansion joint device can be easily worked even in a narrow working space, the working time is shortened and the production cost is reduced. The rubber waterproofing plate can securely fix the inner guide rail by the sliding plate, The installation work of inserting the latching ring of the waterproof plate into the inner guide rail can be easily performed.
On the other hand, Korean Patent Registration No. 10-0662035 (published on Dec. 27, 2006) discloses a method for manufacturing, installing and replacing a rubber waterproofing material of an expansion joint device as another prior art. The method of manufacturing, installing and replacing the rubber waterproofing material of such an expansion joint device is as follows: a guide rail is provided on the vertical surface of the lower plate, a guide roller is installed on both ends of the rubber waterproofing material, the rubber waterproofing material is installed by pushing the guide roller of the rubber waterproofing material into the guide rail It is possible to independently replace the rubber waterproofing material.
As another conventional technique, Korean Patent Registration No. 10-01374606 (Announcement: 2014.03.17) discloses that both ends of the upper waterproof member are fixed to the inner side surfaces of both vertical plates by a fixing member having a "┓" And the members are respectively fixed to the lower portion of the inner surface of the vertical plate by a rail structure. In the expansion joint device having such a structure, the lower waterproofing member is fixedly installed in a sliding manner, so that the construction can be simplified.
However, the conventional art as described above has a problem in that the structure for coupling the waterproof member to the vertical member is complicated.
Particularly, Korean Patent No. 10-01374606 discloses that the means for fixing the upper waterproofing member is constituted only by a fixing member having the shape of "┓", so that even when the fixing member is fastened to the vertical member with the bolt, Therefore, when various external forces act and accumulate, lifting phenomenon occurs in the area between the bolt and the bolt, thereby causing foreign matter or rainwater to flow between the waterproof member and the vertical member.
That is, since the waterproofing member can not maintain the tight contact with the inner surface of the vertical member, the waterproofing member is coupled to the vertical member, so that leakage occurs between the waterproofing member and the inner surface of the vertical member There is a problem.
As another prior art, Korean Patent Registration No. 10-1530663 (Publication Date: 2015.06.22) discloses a rubber waterproof member coupling structure of an expansion joint. In such a rubber waterproofing member coupling structure, when the rubber waterproofing member is coupled to the vertical member with the upper fixing member having the elasticity generating portion, the elasticity generating portion elastically presses the rubber waterproofing member against the vertical member so that the airtightness between the rubber waterproofing member and the vertical member So that leakage could be prevented.
However, the rubber waterproofing member coupling structure of such a structure has a structure in which the upper fixing member, which presses and bonds the rubber waterproofing member to the vertical member, is positioned between the both vertical members so that the rubber waterproofing member is engaged with the vertical member And the workability is deteriorated.
It is an object of the present invention to provide a rubber elastic body which can be firmly coupled with both end portions of a rubber waterproof member by keeping the airtightness at the vertical ends of the respective support members by only the action of fastening the finger plate of the expansion joint device to the horizontal end of the support member, The waterproof rubber member can be replaced at the upper part of the apparatus, and the maintenance and replacement workability can be improved.
The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. It can be understood.
The above object is achieved according to the present invention by a pair of support members each having a vertical end and a horizontal end coupled to the upper end of the vertical end in a horizontal direction and having the vertical ends facing each other, A rubber waterproofing member whose both ends are coupled to the respective vertical ends of both sides and a finger plate which is respectively engaged with the water level ends of both sides, A mounting member coupled to the inner surface of each of the vertical ends, And a pressing member inserted between the inner side surface and the end portion of the vertical end in a state where the end portion of the rubber waterproof member is inserted into the insertion portion and the end portion is brought into close contact with the inner surface of the support end, The finger plate presses the pressing member downward by the tightening force of the bolt so that the lower end of the pressing member closely contacts the supporting end with the lower end of the pressing plate, And the leakage is prevented by keeping the airtightness in the airtight container.
The end portion of the rubber waterproof member may be formed to extend downward to be inserted into the insertion portion.
And a connecting member is provided between the lower end portion of the pressing member and the pressing portion so as to bring the pressing portion into close contact with the bottom of the insertion portion by a pressing force of the pressing member .
A U-shaped extension may be formed at the end to cover the lower end of the pressing member.
A deformation inducing space may be formed in the hermetic holding member such that when the pressing member is pressed downward, deformation due to elasticity and a pressing force is generated between the lower end portion and the bottom of the insertion portion.
The pressing member may be made of any one material selected from a steel material, a synthetic resin material, and a urethane material.
Wherein a plurality of guide slots are formed in the pressing member in the upward and downward directions and the bolt is fastened to the inner surface of the vertical end through the guide slot, , And can be configured to be movable downward.
The lower end of the pressing member may be formed in a wedge shape in which a slope is formed on both sides or one side of the pressing member, and the tapered shape becomes narrower toward the lower side.
Characterized in that the rubber watertight member is formed with an extension between both ends such that sediments flowing between the two finger plates are not laminated.
The supporting member may include a reinforcing partition plate for reinforcing the vertical section and the horizontal section. The reinforcing partition plate may be coupled by connecting the outer surface of the vertical section and the bottom surface of the horizontal section.
In the reinforcement diaphragm, two or more anchors may be coupled to each other in a horizontal direction and a vertical direction, and the anchors may be formed with multiple bent portions so that positions of coupling ends coupled with the reinforcing bars vary depending on the rotation angle.
Wherein at least two anchors are respectively coupled to the horizontal direction and the vertical direction on the outer side surface of the vertical end and the bottom surface of the horizontal step and the anchors are bent in a multi- An additional portion may be formed.
According to the present invention, since the finger plate presses the pressing member downward by the fastening force generated when the finger plate of the expansion joint device is fastened to the horizontal end of the supporting member, the lower end of the pressing member presses the end of the rubber water- So that the waterproof performance of the expansion joint device can be improved.
Particularly, since the finger plate presses the pressing member by the tightening force of the fastening bolt, the end of the rubber waterproof member can firmly come into close contact with the supporting end, thereby improving the airtightness.
Further, in the case of replacing the damaged rubber waterproofing member, the replacement and maintenance of the rubber waterproofing member can be performed at the upper portion of the expansion joint by only removing the finger plate and releasing the pressing member from the insertion portion. It is possible to provide an effect that can be easily performed.
1 is an exploded perspective view showing a telescopic joint device for a bridge having a waterproof structure according to the present invention.
Figs. 2 and 3 are sectional views for explaining the operation of the expansion joint device for bridges having a leakage preventing structure shown in Fig. 1. Fig.
4 is a partially enlarged sectional view showing another embodiment of the pressing member shown in Fig.
Fig. 5 is a partially enlarged sectional view showing another embodiment of the rubber waterproof member shown in Fig. 1. Fig.
6 is a partially enlarged cross-sectional view showing a state in which the hermetic sealing member is coupled to the lower end of the pressure member shown in Fig.
7 is a partially enlarged cross-sectional view showing another embodiment of the hermetic-sealing member shown in Fig.
8 is a partially enlarged sectional view showing a state in which an anchor is provided on the support member shown in Fig.
9 is a cross-sectional view showing another embodiment of the anchor shown in Fig.
10 is a partially enlarged perspective view showing still another embodiment of the anchor shown in Fig.
11 is a cross-sectional view showing another embodiment of the rubber waterproof member shown in Fig.
12 is a cross-sectional view showing another embodiment of the expansion joint shown in Fig.
13 is a cross-sectional view showing another embodiment of the rubber waterproof member shown in Fig.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.
1 is an exploded perspective view showing a telescopic joint device for a bridge having a waterproof structure according to the present invention, and FIGS. 2 and 3 are views showing a telescopic joint device for a bridge having a waterproof structure shown in FIG. Sectional view for explaining the operation of the present invention.
1 to 3, an expansion joint device for a bridge having a water leakage prevention structure according to the present invention is characterized in that a
The expansion joint device for a bridge having such a waterproof structure has a
The supporting
1 and 2, a
The
8, the
9, it is needless to say that the
In addition, as shown in FIG. 10, the
The
11, the space between the bottom surface of the
The mounting
The pressing
The
In the pressing
The pressing
The operation of the expansion joint device for bridges having the leakage preventing structure constructed as described above will be described.
The
Next, the
The
At this time, the upper end of the pressing
When the pressing
3, the
In this process, the
At this time, since the
After the
As a result, the rainwater flowing into the space between the two
The expansion joint device for a bridge having a water leakage prevention structure according to the present invention is an operation for coupling the
That is, in the case of replacing the
Since the work is performed on the upper portion of the expansion joint device for bridges, work between the two
4, another embodiment of the pressing
The
5, the
6, the hermetic sealing
7, a
12, the water leakage preventing structure according to the present invention can be applied to a stretch joint of a finger type (a strong finger type), and as shown in Fig. 13, a rubber
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.
20: Support member 22:
24:
30: finger plate 40: pressing member
42: lower end portion 44: inclined surface
46: guide slot 50: rubber waterproof member
52:
52B: extension part 54: stretchable part
60: mounting member 62: supporting end
64: insertion portion 70: anchor
72: coupling end 74:
80: reinforcing bar 90: sealing member
92: strain inducing space
Claims (13)
An installation member coupled to the inner surface of each of the vertical ends, the support member having a plurality of folded support ends to form an upwardly open insertion portion between the vertical end and the inner surface; And
And a pressing member inserted between the inner side surface and the end portion of the vertical end in a state where the end portion of the rubber waterproof member is inserted into the insertion portion and the end portion is brought into close contact with the inner surface of the support end,
When the finger plate is fastened with the bolt at the horizontal end, the finger plate presses the pressing member downward by the fastening force of the bolt, so that the lower end of the pressing member closely contacts the end of the pressing plate, And the airtightness is maintained between the support ends to prevent water leakage.
Extension joints for bridges with leakproof structure.
The end of the rubber waterproof member
Wherein the insertion portion is formed to extend downward to be inserted into the insertion portion.
Extension joints for bridges with leakproof structure.
At the end,
And a connecting member is provided between the lower end portion of the pressing member and the pressing portion to bring the pressing portion into close contact with the bottom of the insertion portion by a pressing force of the pressing member. ,
Extension joints for bridges with leakproof structure.
At the end,
And a U-shaped extension portion is formed to surround the lower end of the pressing member.
Extension joints for bridges with leakproof structure.
At the lower end of the pressing member,
And a hermetic holding member which is tightly attached to the inner side surface and the end portion of the vertical end and surrounds the lower end portion so as to maintain airtightness.
Extension joints for bridges with leakproof structure.
In the hermetic sealing member,
Wherein when the pressing member is pressed downward, a deformation inducing space is formed between the lower end portion and the bottom of the insertion portion to generate deformation by elasticity and pressing force.
Extension joints for bridges with leakproof structure.
The pressing member
Characterized in that it is made of any one material selected from a steel material, a synthetic resin material and a urethane material.
Extension joints for bridges with leakproof structure.
In the pressing member,
And a bolt is fastened to the inner surface of the vertical end through the guide slot so that the pressing member is movable upward and downward in a state of being coupled to the vertical end, Lt; RTI ID = 0.0 >
Extension joints for bridges with leakproof structure.
The lower end of the pressing member
Wherein a slant surface is formed on both sides or one side and is formed into a wedge shape that becomes narrower toward the lower side.
Extension joints for bridges with leakproof structure.
The rubber waterproof member
Characterized in that an extension is formed between both ends so that sediments flowing between the finger plates on both sides are not stacked.
Extension joints for bridges with leakproof structure.
Wherein the support member comprises:
And a reinforcing partition plate for reinforcing the vertical section and the horizontal section, wherein the reinforcing partition plate is coupled by connecting the outer surface of the vertical section and the bottom surface of the horizontal section.
Extension joints for bridges with leakproof structure.
In the reinforcing partition,
Wherein the anchor is formed with a plurality of folded portions so that the position of the coupling end coupled with the reinforcing bar varies according to the angle of rotation, wherein at least two anchors are coupled to each other in a horizontal direction and a vertical direction,
Extension joints for bridges with leakproof structure.
On the outer surface of the vertical end and the bottom surface of the horizontal end,
Wherein the anchor is formed with a plurality of folded portions so that the position of the coupling end coupled with the reinforcing bar varies according to the angle of rotation, wherein at least two anchors are coupled to each other in a horizontal direction and a vertical direction,
Extension joints for bridges with leakproof structure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150166378A KR101800653B1 (en) | 2015-11-26 | 2015-11-26 | Expansion joint for bridge having leakage protection sturcture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150166378A KR101800653B1 (en) | 2015-11-26 | 2015-11-26 | Expansion joint for bridge having leakage protection sturcture |
Related Child Applications (1)
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KR1020170126631A Division KR101811824B1 (en) | 2017-09-28 | 2017-09-28 | Expansion joint for bridge having leakage protection sturcture |
Publications (2)
Publication Number | Publication Date |
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KR20170061404A true KR20170061404A (en) | 2017-06-05 |
KR101800653B1 KR101800653B1 (en) | 2017-11-27 |
Family
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108411774A (en) * | 2018-04-04 | 2018-08-17 | 四川铁创科技有限公司 | A kind of telescopic device nose and its installation method |
CN108677703A (en) * | 2018-06-04 | 2018-10-19 | 郑州德威机械设备有限公司 | A kind of highway bridge bridge deck drainage facility |
KR101984471B1 (en) * | 2018-06-01 | 2019-05-30 | (주)올바른이엔씨 | A Expansion joint for preventing sagging and presetting |
CN110093855A (en) * | 2018-01-31 | 2019-08-06 | 刁望东 | A kind of bridge expansion joint installation of damping closed type |
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KR102168881B1 (en) * | 2019-08-29 | 2020-10-22 | 주식회사 제이에스컴 | reinforcement structure of bridge inspection facility |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000204577A (en) * | 1999-01-14 | 2000-07-25 | Ninomiya Sangyo Kk | Manhole cover sealant |
KR200252617Y1 (en) * | 2001-07-18 | 2001-11-17 | 보람엔지니어링주식회사 | Expansion joint seal |
KR200269454Y1 (en) * | 2001-12-06 | 2002-03-23 | 김해영 | Elastic Joint of Bridge |
KR101166433B1 (en) * | 2012-03-27 | 2012-07-19 | 이진 | A expansion joint apparatus for bridge structure |
KR101244463B1 (en) * | 2012-12-27 | 2013-03-18 | (주)협성엔지니어링 | Expansion joint for bridge |
KR101326291B1 (en) * | 2013-04-02 | 2013-11-11 | 피엔에이건설 주식회사 | Expansion connector for connection storage bridge |
-
2015
- 2015-11-26 KR KR1020150166378A patent/KR101800653B1/en active IP Right Grant
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110093855A (en) * | 2018-01-31 | 2019-08-06 | 刁望东 | A kind of bridge expansion joint installation of damping closed type |
CN108411774A (en) * | 2018-04-04 | 2018-08-17 | 四川铁创科技有限公司 | A kind of telescopic device nose and its installation method |
CN108411774B (en) * | 2018-04-04 | 2019-11-15 | 四川铁创科技有限公司 | A kind of telescopic device nose and its installation method |
KR101984471B1 (en) * | 2018-06-01 | 2019-05-30 | (주)올바른이엔씨 | A Expansion joint for preventing sagging and presetting |
CN108677703A (en) * | 2018-06-04 | 2018-10-19 | 郑州德威机械设备有限公司 | A kind of highway bridge bridge deck drainage facility |
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