CN113832827A - Guide beam for steel box girder pushing construction - Google Patents
Guide beam for steel box girder pushing construction Download PDFInfo
- Publication number
- CN113832827A CN113832827A CN202111109085.3A CN202111109085A CN113832827A CN 113832827 A CN113832827 A CN 113832827A CN 202111109085 A CN202111109085 A CN 202111109085A CN 113832827 A CN113832827 A CN 113832827A
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- girder
- steel box
- truss
- box girder
- variable cross
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000000576 coating method Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 238000005034 decoration Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application provides a steel box girder top pushes away nose girder for construction, it includes two parallel arrangement's main longitudinal beam and connects the connection truss of two main longitudinal beams, every main longitudinal beam includes fixed beam and variable cross section truss girder, the fixed beam is used for fixed with the nose girder built-in fitting of steel box girder front end, variable cross section truss girder reduces gradually towards the cross-section of keeping away from the one end of fixed beam from the one end that is close to the fixed beam, the tip that fixed beam was kept away from to variable cross section truss girder is equipped with the L type and connects, the long limit that the L type connects extends and is located the upside of minor face along the length direction of main longitudinal beam, its minor face with the end fixing of variable cross section truss girder. Through the pier on the nose girder guide steel box girder, the top of being convenient for pushes away rectifying of in-process, sets up L type end at the nose girder tip, can be when the nose girder moves forward, is convenient for set up on the interim pier in front, and the jacking provides the stress point when warping down for the nose girder front end.
Description
Technical Field
The application relates to steel box girder construction field, especially relates to a nose girder steel box girder pushes away construction usefulness.
Background
In bridge construction, a bridge cannot be constructed in a cast-in-place mode by using a support because a railway, a highway or a river needs to be spanned, so that the bridge is often erected by adopting a push-out method, and the erection of the bridge is completed by using a steel guide beam in the push-out method. The prior steel guide beam has the advantages that the cantilever end of the steel guide beam has larger deflection at the front end due to dead weight in the construction process, the structural stability is poorer, and the guide pushing of the upper pier of the beam section is not convenient.
Disclosure of Invention
The purpose of this application aims at providing one kind stability height, can ensure that the steel box girder pushes away the guide beam for construction through the steel box girder top at pier and fulcrum top smoothly.
In order to achieve the above object, the present application provides the following technical solutions:
the utility model provides a steel box girder top pushes away nose girder for construction, includes two parallel arrangement's main longitudinal beam and connects two the connection truss of main longitudinal beam, every the main longitudinal beam includes fixed beam and variable cross section truss roof beam, the fixed beam is used for fixed with the nose girder built-in fitting of steel box girder front end diaphragm department, variable cross section truss roof beam is close to certainly the one end of fixed beam is towards keeping away from the cross-section of the one end of fixed beam reduces gradually, just the tip that fixed beam was kept away from to variable cross section truss roof beam is equipped with L type and connects, the long limit that L type connects is followed the length direction of main longitudinal beam extends and is located the upside of minor face, its minor face with the end fixing of variable cross section truss roof beam.
Further setting: the fixed beam and the variable cross-section truss girder of each main longitudinal beam are fixedly connected through a high-strength bolt, the variable cross-section truss girder at least comprises two longitudinal beam sections, and the two adjacent longitudinal beam sections are also connected through the high-strength bolt.
Further setting: the fixed beam and the variable cross-section truss beam are all I-shaped steel structures formed by welding and combining steel plates.
Further setting: at least one connecting truss is arranged between every two opposite longitudinal beam sections.
Further setting: the connecting truss is connected with the longitudinal beam sections through a hinge structure.
Further setting: the connecting truss is a truss frame structure formed by square pipes.
Further setting: the wall thickness of square pipe is 8 mm.
Further setting: the lower side of the short side of the L-shaped joint is provided with an extension rod parallel to the long side, a connecting rod obliquely connecting the extension rod and the short side is arranged between the extension rod and the short side, and the distance between the extension rod and the connecting point of the connecting rod and the short side is larger than half of the length of the short side.
Further setting: and the anti-sliding coefficient of the connecting end surface of the guide beam embedded part of the fixed beam and the steel box beam is not less than 0.45, and the fixed beam and the guide beam embedded part are connected through a high-strength bolt.
Further setting: and the inner surface and the outer surface of the guide beam are both provided with antirust coatings.
Compared with the prior art, the scheme of the application has the following advantages:
1. in the utility model provides an among the nose girder, lead the steel box girder upper pier through the nose girder, be convenient for push away rectifying of in-process, the setting of nose girder still can reduce the cantilever length of steel box girder in the top pushing process simultaneously to reduce the hogging moment peak value under the steel box girder cantilever state, improve the stability that the steel box girder top pushed away the in-process. The L-shaped end head at the front end of the guide beam can be conveniently erected on a front temporary pier when the guide beam moves forwards, and can provide a stress point for jacking when the front end of the guide beam deflects downwards.
2. In the utility model provides an in the nose girder, the main longitudinal beam is the structure setting that the variable cross-section reduces gradually towards the front end by its rear end, has reduced the dead weight of nose girder front end, can effectively alleviate the range of disturbing down of nose girder front end.
3. In the nose girder of this application, set up the extension rod through the downside at the minor face that the L type connects and can avoid the L type to connect when setting up on the pier, pier direct impact leads the tip of roof beam to play the effect of protection to the nose girder, the structural stability of connecting rod can be strengthened to the connecting rod, prolongs the life-span of extension rod.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a front view of one embodiment of a guide beam according to the present application;
FIG. 2 is a top view of one embodiment of a guide beam according to the present application;
fig. 3 is a schematic view of an L-joint of the guide beam of the present application.
In the figure, 1, a main longitudinal beam; 11. a fixed beam; 12. a variable cross-section truss beam; 121. a stringer segment; 13. a high-strength bolt; 2. connecting a truss; 3. an L-shaped joint; 31. a long side; 32. a short side; 33. an extension rod; 34. a connecting rod.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Please refer to fig. 1 to 3, the present application relates to a guide beam for steel box girder incremental launching construction, in order to meet the requirement of steel box girder middle girder incremental launching construction, a transverse partition plate at the end of the steel box girder is provided with an incremental launching guide beam embedded part for installing the guide beam for steel box girder incremental launching construction of the present application, which comprises two main longitudinal girders 1 arranged in parallel and a connecting truss 2 connected between the two main longitudinal girders 1.
Each main longitudinal beam 1 comprises a fixed beam 11 and a variable cross-section truss beam 12, the fixed beam 11 is used for being fixed with a guide beam embedded part at a diaphragm plate of the steel truss beam, the anti-sliding coefficient of the connection end face of the fixed beam 11 and the guide beam embedded part of the steel box beam is not less than 0.45, the fixed beam 11 and the guide beam embedded part are connected through a high-strength bolt 13, the fixed beam 11 and the variable cross-section truss beam 12 are also fixedly connected through the high-strength bolt 13, and the bottom line type of the main longitudinal beam 1 is consistent with that of the steel box beam connected with the main longitudinal beam. This application is through connecting the nose girder in the front end diaphragm department of steel box girder, can reduce the cantilever length of steel box girder at the top pushing in-process to reduce the hogging moment peak value under the steel box girder cantilever state, improve the stability of steel box girder at the promotion in-process then.
In the present invention, the end of the fixed beam 11 connecting the main longitudinal beam 1 and the steel box girder is set as the rear end of the main longitudinal beam 1, and the end of the variable cross-section truss girder 12 of the main longitudinal beam 1 away from the fixed beam 11 is set as the front end of the main longitudinal beam 1.
The cross section of the variable cross-section truss girder 12 gradually decreases from the end close to the fixed girder 11 to the end far away from the fixed girder 11, that is, the main longitudinal girder 1 is configured in a structure in which the cross section gradually decreases from the rear end to the front end thereof. The section of the main longitudinal beam 1 is gradually reduced, so that the dead weight of the front end of the main longitudinal beam can be reduced, and the downwarping amplitude of the front end of the guide beam in the pushing process can be effectively relieved.
Variable cross section truss girder 12 keeps away from the tip of fixed beam 11 (promptly the front end of main longitudinal beam) is equipped with the L type and connects 3, the L type connect 3 the minor face 32 with the end fixing of variable cross section truss girder 12, its long limit 31 is followed the length direction of main longitudinal beam 1 extends, just long limit 31 is located the upside of minor face 32, thereby can when the nose girder moves forward, be convenient for take and establish on the interim mound in the place ahead, can for the jacking provides the stress point when the nose girder front end is downwarped, can play the effect of rectifying a deviation to the nose girder simultaneously, ensures going on smoothly of top.
Referring to the drawings, the variable cross-section truss girder 12 at least includes two longitudinal girder segments 121, and two adjacent longitudinal girder segments 121 are connected by high-strength bolts 13. Preferably, the fixed beam 11 and the variable-section truss beam 12 are both i-steel structures formed by welding and combining steel plates, specifically, Q345B steel is adopted, and M24 high-strength bolts are adopted to fix the two adjacent longitudinal beam sections 121 and the fixed beam 11 and the variable-section truss beam 12. In addition, the fixed beam 11 and the longitudinal beam segment 121 can be manufactured in a factory in segments and then transported to a construction site for assembly, so that transportation and construction are facilitated.
At least one connecting truss 2 is arranged between every two opposite longitudinal beam sections 121 of the two main longitudinal beams 1, each variable cross-section truss beam 12 of the embodiment is provided with three longitudinal beam sections 121, correspondingly, one connecting truss 2 is arranged between every two opposite longitudinal beam sections 121 of the two main longitudinal beams 1, and meanwhile, the connecting truss 2 is also arranged between every two opposite fixed beams 11 of the two main longitudinal beams 1. In addition, the connecting girder 2 is connected with the girder segments 121 through a hinge structure, so that the main girder 1 and the connecting girder 2 can be conveniently assembled and disassembled. Preferably, the connecting girder 2 of the present embodiment is a girder frame structure composed of square pipes having a wall thickness of 8 mm.
Referring to the drawings, an extension bar 33 parallel to the long side 31 is provided on a side of the short side 32 of the L-shaped joint 3 away from the connection with the long side 31 (i.e., a lower side of the short side 32), and a connection bar 34 connecting the extension bar 33 and the short side 32 in an inclined manner is provided between the two, and a distance between connection points of the extension bar 33 and the connection bar 34 and the short side 32 is greater than half of a length of the short side 32. The extension bar 33 is arranged at the lower side of the short side 32, so that the bridge pier is prevented from directly colliding with the end part of the guide beam when the L-shaped joint 3 is erected on the bridge pier, the guide beam is protected, the connecting rod 34 can enhance the structural stability of the connecting rod 34, and the service life of the extension bar 33 is prolonged.
Because the pushing time span is large, in order to prevent the guide beam from being rusted, the guide beam needs to be subjected to antirust coating treatment so as to form antirust coatings on the inner surface and the outer surface of the guide beam, and the antirust coatings need to meet the Sa 21/2 level requirement. After the nose girder preparation of this application was accomplished, usable portal crane or truck crane installed it hoist to assembling on the support, and installation, transportation are convenient. Because all adopt high strength bolt 13 to connect between the part of the steel box girder top pushes away construction and uses the nose girder of this application to can be after the top pushes away the construction and accomplishes, will variable cross section truss girder 11, connection truss 2 are demolishd, and fixed beam 11 can remain as permanent component on the steel box girder, variable cross section truss girder 12 and connection truss 2 after demolising can circulate and have enough to meet the need the use, in order to save construction cost.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (9)
1. The utility model provides a steel case roof beam pushes away construction and uses nose girder which characterized by: including two parallel arrangement's main longitudinal and connect two main longitudinal's connection truss, every main longitudinal includes fixed beam and variable cross section truss girder, the fixed beam is used for fixed with the nose girder built-in fitting of steel case roof beam front end diaphragm department, variable cross section truss girder is close to certainly the one end of fixed beam is towards keeping away from the cross-section of the one end of fixed beam reduces gradually, just the tip that fixed beam was kept away from to variable cross section truss girder is equipped with L type and connects, the long limit that L type connects is followed the length direction of main longitudinal extends and is located the upside of minor face, its minor face with the tip of variable cross section truss girder is fixed.
2. The guide beam for steel box girder incremental launching construction according to claim 1, which is characterized in that: the fixed beam and the variable cross-section truss beam are all I-shaped steel structures formed by welding and combining steel plates.
3. The guide beam for steel box girder incremental launching construction according to claim 2, which is characterized in that: at least one connecting truss is arranged between every two opposite longitudinal beam sections.
4. The guide beam for steel box girder incremental launching construction according to claim 3, which is characterized in that: the connecting truss is connected with the longitudinal beam sections through a hinge structure.
5. The guide beam for steel box girder incremental launching construction according to claim 1, which is characterized in that: the connecting truss is a truss frame structure formed by square pipes.
6. The guide beam for steel box girder incremental launching construction according to claim 5, which is characterized in that: the wall thickness of square pipe is 8 mm.
7. The guide beam for steel box girder incremental launching construction according to claim 1, which is characterized in that: the lower side of the short side of the L-shaped joint is provided with an extension rod parallel to the long side, a connecting rod obliquely connecting the extension rod and the short side is arranged between the extension rod and the short side, and the distance between the extension rod and the connecting point of the connecting rod and the short side is larger than half of the length of the short side.
8. The guide beam for steel box girder incremental launching construction according to claim 1, which is characterized in that: and the anti-sliding coefficient of the connecting end surface of the guide beam embedded part of the fixed beam and the steel box beam is not less than 0.45, and the fixed beam and the guide beam embedded part are connected through a high-strength bolt.
9. The guide beam for steel box girder incremental launching construction according to claim 1, which is characterized in that: and the inner surface and the outer surface of the guide beam are both provided with antirust coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109085.3A CN113832827A (en) | 2021-09-22 | 2021-09-22 | Guide beam for steel box girder pushing construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109085.3A CN113832827A (en) | 2021-09-22 | 2021-09-22 | Guide beam for steel box girder pushing construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113832827A true CN113832827A (en) | 2021-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111109085.3A Pending CN113832827A (en) | 2021-09-22 | 2021-09-22 | Guide beam for steel box girder pushing construction |
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| Country | Link |
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| CN (1) | CN113832827A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201943009U (en) * | 2011-02-22 | 2011-08-24 | 北京城建道桥建设集团有限公司 | Simple fast-dismounting type steel truss guide beam |
| CN102465495A (en) * | 2010-11-17 | 2012-05-23 | 杨光华 | Protection device for pier and anti-collision pier of bridge |
| CN102733308A (en) * | 2012-06-19 | 2012-10-17 | 中铁八局集团昆明铁路建设有限公司 | Method for connecting steel guide girder with box girder |
| CN205839596U (en) * | 2016-04-08 | 2016-12-28 | 同济大学 | A kind of Wavelike steel webplate Guide beam structure of strip steel boots |
| CN109868722A (en) * | 2019-03-26 | 2019-06-11 | 中交武汉港湾工程设计研究院有限公司 | A kind of pier method on box beam end construction and box beam convenient for upper pier |
| CN209907228U (en) * | 2019-04-29 | 2020-01-07 | 广西路桥工程集团有限公司 | Steel beam pushing and guiding device |
| CN211340473U (en) * | 2019-08-22 | 2020-08-25 | 中铁八局集团昆明铁路建设有限公司 | Steel guide beam for large-span steel beam pushing construction |
| WO2020233501A1 (en) * | 2019-05-23 | 2020-11-26 | 中铁二局集团有限公司 | Construction method for upright lifting of large-tonnage box girder to bridge, and erection method for large-tonnage box girder |
| CN213061735U (en) * | 2020-08-14 | 2021-04-27 | 北京城建亚泰金典建设工程有限公司 | Pushing device for steel structure construction |
| CN213596817U (en) * | 2020-09-09 | 2021-07-02 | 中交武汉港湾工程设计研究院有限公司 | Guide beam for long-distance steel box girder pushing construction |
-
2021
- 2021-09-22 CN CN202111109085.3A patent/CN113832827A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465495A (en) * | 2010-11-17 | 2012-05-23 | 杨光华 | Protection device for pier and anti-collision pier of bridge |
| CN201943009U (en) * | 2011-02-22 | 2011-08-24 | 北京城建道桥建设集团有限公司 | Simple fast-dismounting type steel truss guide beam |
| CN102733308A (en) * | 2012-06-19 | 2012-10-17 | 中铁八局集团昆明铁路建设有限公司 | Method for connecting steel guide girder with box girder |
| CN205839596U (en) * | 2016-04-08 | 2016-12-28 | 同济大学 | A kind of Wavelike steel webplate Guide beam structure of strip steel boots |
| CN109868722A (en) * | 2019-03-26 | 2019-06-11 | 中交武汉港湾工程设计研究院有限公司 | A kind of pier method on box beam end construction and box beam convenient for upper pier |
| CN209907228U (en) * | 2019-04-29 | 2020-01-07 | 广西路桥工程集团有限公司 | Steel beam pushing and guiding device |
| WO2020233501A1 (en) * | 2019-05-23 | 2020-11-26 | 中铁二局集团有限公司 | Construction method for upright lifting of large-tonnage box girder to bridge, and erection method for large-tonnage box girder |
| CN211340473U (en) * | 2019-08-22 | 2020-08-25 | 中铁八局集团昆明铁路建设有限公司 | Steel guide beam for large-span steel beam pushing construction |
| CN213061735U (en) * | 2020-08-14 | 2021-04-27 | 北京城建亚泰金典建设工程有限公司 | Pushing device for steel structure construction |
| CN213596817U (en) * | 2020-09-09 | 2021-07-02 | 中交武汉港湾工程设计研究院有限公司 | Guide beam for long-distance steel box girder pushing construction |
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Application publication date: 20211224 |
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| RJ01 | Rejection of invention patent application after publication |