CN112854021A - Rotary in-place construction method for crossing bridge - Google Patents
Rotary in-place construction method for crossing bridge Download PDFInfo
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- CN112854021A CN112854021A CN202110144846.2A CN202110144846A CN112854021A CN 112854021 A CN112854021 A CN 112854021A CN 202110144846 A CN202110144846 A CN 202110144846A CN 112854021 A CN112854021 A CN 112854021A
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- 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
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
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- 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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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method for rotatably positioning a spanning bridge, wherein a span-in bracket and an outer bracket are respectively arranged in the span-in and at two sides of a road to be used as temporary brackets, and a track beam is arranged on each temporary bracket; respectively assembling half-section steel box girders on two sides parallel to a road by taking bridge beam ends of piers and track girders as supporting points; one end of the half-section steel box girder, which is positioned at the pier, is a rotating center end, and one end of the half-section steel box girder, which is positioned at the girder end of the track girder, is a rotating movable end; and pushing the rotary movable ends of the half-section steel box girders to the center of the girder of the track girder from the girder end of the track girder by adopting a pushing mechanism, closing the rotary movable ends of the two half-section steel box girders at the midspan, keeping the rotary central end of the half-section steel box girders on a pier, welding a midspan closure opening, dismantling the temporary support and completing the in-place construction of the steel box girders. The invention has high tooling level and safe and efficient construction process, is suitable for the simple steel box girder to cross the existing road under the complex terrain environment, and greatly reduces the interference of bridge construction on the road traffic.
Description
Technical Field
The invention relates to the technical field of simple-support steel box girder cross road installation construction, in particular to a construction method for a simple-support steel box girder to cross an existing traffic road in a complex terrain environment.
Background
With the continuous perfection of traffic infrastructure and the continuous organization of road networks, it is more and more common to build bridges in environments with complex landforms or crossing existing traffic roads. When a bridge spans an existing traffic road, the traditional method comprises a bridge erecting frame method, a turning method, a support method, a pushing method and the like, but when the bridge is a simple beam and has a large span, the bridge erecting frame method and the turning method cannot meet the construction requirements; if the support method and the pushing method are adopted for construction, an assembling support or a pushing support needs to be erected on an existing passing road, the passing of the existing road is influenced to a certain extent, the passing road can be in a limited passing state for a long time, and the passing function of the road is greatly reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the rotary positioning construction method for the bridge crossing, which has high tooling level and safe and efficient construction process, is suitable for simply-supported steel box girders crossing the existing traffic roads in complex terrain environments and reduces the interference of bridge construction on road traffic.
The invention adopts the following technical scheme for solving the technical problems:
the rotary in-place construction method for the spanning bridge is characterized by comprising the following steps:
providing a temporary support comprising: a middle support is arranged in the center of the road, and outer supports are respectively arranged at two sides of the road; installing a track beam on the temporary support, enabling the center of the track beam to be positioned on the midspan support, and enabling the beam end of the track beam to be positioned on the outer side supports on two sides;
the steel box girder is segmented into two half-segment steel box girders for splicing, two-side steel box girder splicing frames are respectively constructed on two sides parallel to a road by taking bridge piers and beam ends of track girders as supporting points, and the splicing of the half-segment steel box girders is completed on the steel box girder splicing frames; setting one end of the half-section steel box girder, which is positioned at a pier, as a rotating center end, and setting one end of the half-section steel box girder, which is positioned at a beam end of a track beam, as a rotating movable end;
pushing the rotary movable end of the half-section steel box girder from the girder end of the track girder to the girder center of the track girder by adopting a pushing mechanism; and (3) closing the rotary movable ends of the two half-section steel box girders at the midspan positions on the track girders until the rotary movable ends of the two half-section steel box girders are closed, keeping the rotary central ends of the two half-section steel box girders on the piers, welding midspan closing openings, and then removing the temporary supports to complete the in-place construction of the steel box girders.
The rotary positioning construction method for the spanning bridge is also characterized in that: the pushing mechanism is a horizontal hydraulic jack arranged on the track beam, a rotary roller is arranged at the bottom of the half-section steel box beam, and the horizontal hydraulic jack pushes the rotary roller to enable the rotary movable end of the half-section steel box beam to rotate on the track beam and move forwards along the track beam.
The rotary positioning construction method for the spanning bridge is also characterized in that: the rotary idler wheel is characterized in that an upper rotating body and a lower rolling body are respectively arranged on an idler wheel seat, the lower rolling body is supported on the track beam and can move forwards along the track beam under the pushing of the horizontal hydraulic jack, and the upper rotating body is a rotatable piece arranged at the bottom of the half-section steel box beam.
The rotary positioning construction method for the spanning bridge is also characterized in that: and installing the track beam on the temporary support by adopting a pushing method.
The rotary positioning construction method for the spanning bridge is also characterized in that: and arranging a support frame between the bridge pier and the outer side support on the corresponding side, forming a support of the steel box girder assembling frame by the bridge pier, the outer side support and the support frame together, and assembling the half-section steel box girder on the steel box girder assembling frame by adopting a support method.
Compared with the prior art, the invention has the beneficial effects that:
the method is suitable for erection and installation construction of the simple steel box girder crossing the existing traffic road, and compared with the traditional support method and the pushing method, the method has the advantages of high tooling level, safe and efficient construction process, greatly shortened road traffic interference time caused by bridge construction, suitability for the simple steel box girder crossing the existing traffic road in the complex terrain environment, and greatly reduced road traffic interference caused by bridge construction.
Drawings
FIG. 1 is a schematic plan view of the construction method of the present invention;
FIG. 2 is a schematic view of the construction method of the present invention in an elevation view;
FIG. 3 is a side view of FIG. 2;
reference numbers in the figures: the road comprises a road 1, a middle span support 2a, an outer side support 2b, a track beam 3, a pier 4, a steel box beam 5, a rotary movable end 5a, a rotary center end 5b, rotary rollers 6, a horizontal hydraulic jack 7, a temporary supporting point 8, a steel box beam assembling frame 9 and a pile foundation 10.
Detailed Description
Referring to fig. 1, 2 and 3, the construction method for the cross-bridge rotation positioning in the embodiment is as follows:
firstly, a temporary support is arranged, comprising: a middle support 2a is arranged in the center of the road 1, and outer supports 2b are respectively arranged at two sides of the road 1; the track beam 3 is arranged on the temporary support, the beam center of the track beam 3 is positioned on the midspan support 2a, and the beam end of the track beam 3 is positioned on the outer supports 2b at two sides.
Then, the steel box girder 5 is segmented into two half-segment steel box girders for splicing, two steel box girder splicing frames 9 are respectively constructed on two sides parallel to the road 1 by taking the beam ends of the bridge piers 4 and the track girders 3 as supporting points, and the splicing of the half-segment steel box girders is respectively completed on the steel box girder splicing frames 9 on each side; one end of the half-section steel box girder, which is positioned at the pier 4, is set as a rotating center end 5b, and one end of the half-section steel box girder, which is positioned at the girder end of the track girder 3, is set as a rotating movable end 5 a.
Finally, a pushing mechanism is adopted to push the rotary movable end 5a of each half section of steel box girder from the beam end of the track girder 3 to the center of the track girder 3, and meanwhile, the rotary central end 5b of each half section of steel box girder rotates on the bridge pier 4, and the posture of the steel box girder is adjusted accordingly; until the rotary movable ends 5a of the two half-section steel box girders are closed at the midspan position on the track girder 3, simultaneously, the rotary central ends 5b of the two half-section steel box girders are kept on the piers 4, and the geometric posture of the steel box girders 5 is adjusted to ensure that the steel box girders 5 are superposed with the design line position; and welding the span-in closure opening, and then removing the temporary support to complete the in-place construction of the steel box girder 5.
The pushing mechanism shown in fig. 2 is a horizontal hydraulic jack 7 installed on the track beam 3, the bottom of the half-section steel box beam is provided with a rotating roller 6, and the horizontal hydraulic jack 7 pushes the rotating roller 6 to rotate the rotating movable end 5a of each half-section steel box beam on the track beam 3 and move forward along the track beam 3.
The rotating roller 6 shown in fig. 3 is provided with an upper rotating body 6a and a lower rolling body 6b on a roller seat, wherein the lower rolling body 6b is supported on the track beam 3 and can advance along the track beam 3 under the pushing of a horizontal hydraulic jack 7, and the upper rotating body 6a is a rotatable member arranged at the bottom of a half-section steel box girder.
Fig. 1 shows that a support frame 8 is arranged between a pier 4 and an outer support 2b on the corresponding side, the pier 4, the outer support 2b and the support frame 8 jointly form a support of a steel box girder assembling frame 9 so as to meet assembling requirements, and assembling of a half-section steel box girder on the steel box girder assembling frame 9 is completed by a support method.
In specific implementation, the corresponding technical measures also include:
the middle-span support 2a and the outer side support 2b in the temporary support are both formed by assembling steel pipes and section steel, and the bottom of a steel pipe upright post is arranged on the pile foundation 10.
In order to reduce the interference of construction on road traveling, a track beam 3 is installed on the temporary support by adopting a pushing method, and the track beam is pushed from one side of the road 1 by adopting a walking pushing method, and then pushed again after subsequent track beam sections are hoisted until the operation is finished; then, a rotary roller 6 and a horizontal hydraulic jack 7 are arranged on the track beam 3; the track beam 3 is an I-shaped section steel member composed of steel plates.
The track beam is constructed by adopting a walking jacking method, the simply supported steel box beam is constructed by adopting jacking rotation, the tooling level is high, the construction process is safe and efficient, the track beam is suitable for the situation that the simply supported steel box beam spans the existing traffic road in a complex terrain environment, and the interference of bridge construction on the road traffic is greatly reduced.
Claims (5)
1. A rotary in-place construction method for a spanning bridge is characterized by comprising the following steps:
providing a temporary support comprising: a midspan bracket (2a) is arranged in the center of the road (1), and outer brackets (2b) are respectively arranged at two sides of the road (1); the temporary supports are provided with track beams (3), the beam centers of the track beams (3) are positioned on the midspan supports (2a), and the beam ends of the track beams (3) are positioned on the outer side supports (2b) on two sides;
the steel box girder (5) is segmented into two half-segment steel box girders for splicing, two steel box girder splicing frames (9) are respectively constructed on two sides parallel to a road (1) by taking beam ends of a pier (4) and a track girder (3) as supporting points, and the half-segment steel box girders are spliced on the steel box girder splicing frames (9); setting one end of the half-section steel box girder, which is positioned at a pier (4), as a rotating center end, and setting one end of the half-section steel box girder, which is positioned at a beam end of a track beam (3), as a rotating movable end;
a pushing mechanism is adopted to push the rotary movable end of the half-section steel box girder from the girder end of the track girder (3) to the center of the track girder (3); and (3) closing the rotary movable ends of the two half-section steel box girders at the midspan positions on the track girders (3), keeping the rotary central ends of the two half-section steel box girders on the piers (4), welding midspan closing openings, and then removing the temporary supports to complete the in-place construction of the steel box girders (5).
2. The rotary setting construction method for crossing bridges of claim 1, wherein: the pushing mechanism is a horizontal hydraulic jack (7) installed on the track beam (3), a rotary roller (6) is arranged at the bottom of the half-section steel box beam, and the horizontal hydraulic jack (7) pushes the rotary roller (6) to enable the rotary movable end of the half-section steel box beam to rotate on the track beam (3) and move forwards along the track beam.
3. The bridge spanning rotary in-place construction method according to claim 2, wherein: rotatory gyro wheel (6) set up upper rotor (6a) and lower part rolling element (6b) respectively on the gyro wheel seat, lower part rolling element (6b) support is on track roof beam (3) to can advance along track roof beam (3) under the top of horizontal hydraulic jack (7) top, upper rotor (6a) are the rotatable piece that sets up the bottom at half section steel case roof beam.
4. The bridge spanning rotary in-place construction method according to claim 1, wherein: and installing a track beam (3) on the temporary support by adopting a pushing method.
5. The bridge spanning rotary in-place construction method according to claim 1, wherein: set up support frame (8) between pier (4) and outside support (2b) of corresponding one side to pier (4), outside support (2b) and support frame (8) constitute the support of steel box girder concatenation frame (9) jointly, adopt the support method to accomplish assembling of half section steel box girder on steel box girder concatenation frame (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110144846.2A CN112854021A (en) | 2021-02-02 | 2021-02-02 | Rotary in-place construction method for crossing bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110144846.2A CN112854021A (en) | 2021-02-02 | 2021-02-02 | Rotary in-place construction method for crossing bridge |
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| CN112854021A true CN112854021A (en) | 2021-05-28 |
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| CN202110144846.2A Pending CN112854021A (en) | 2021-02-02 | 2021-02-02 | Rotary in-place construction method for crossing bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404778A (en) * | 2022-07-25 | 2022-11-29 | 中铁十一局集团有限公司 | Long-span steel box girder pushing system for crossing existing road |
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| CN111926691A (en) * | 2020-08-21 | 2020-11-13 | 中国铁路设计集团有限公司 | Pier top rotating structure with power arranged on side pier and construction method |
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2021
- 2021-02-02 CN CN202110144846.2A patent/CN112854021A/en active Pending
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| JP2000008329A (en) * | 1998-06-26 | 2000-01-11 | Nishimatsu Constr Co Ltd | Construction method of bridge |
| JP2007138514A (en) * | 2005-11-17 | 2007-06-07 | Mitsubishi Heavy Industries Bridge & Steel Structures Engineering Co Ltd | Erection method of girder |
| CN102733317A (en) * | 2012-07-22 | 2012-10-17 | 中铁二十局集团第一工程有限公司 | Plane rotation construction technique for steel truss girder for existing bridge spanning construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404778A (en) * | 2022-07-25 | 2022-11-29 | 中铁十一局集团有限公司 | Long-span steel box girder pushing system for crossing existing road |
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Application publication date: 20210528 |