CN212561170U - Ring steel structure box pedestrian bridge jacking structure - Google Patents
Ring steel structure box pedestrian bridge jacking structure Download PDFInfo
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- CN212561170U CN212561170U CN201922187546.3U CN201922187546U CN212561170U CN 212561170 U CN212561170 U CN 212561170U CN 201922187546 U CN201922187546 U CN 201922187546U CN 212561170 U CN212561170 U CN 212561170U
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Abstract
The utility model discloses a ring steel construction box passenger footbridge jacking structure, its characterized in that: the method specifically comprises the following steps: each ring steel construction box pedestrian bridge of steel pipe pier segmentation, each connection steel platform, the interim support of pontic, platform pier frame are constituteed, its characterized in that: the steel pipe bridge pier is installed in place and welded and fixed, a series of temporary bridge body supports and platform support frames are arranged on the basis of installation positions of all the circular steel structure box type passenger footbridge sections and all the connecting steel platforms, all the circular steel structure box type passenger footbridge sections and all the connecting steel platforms are assembled into a whole circular steel structure box type passenger footbridge, and all the connecting steel platforms are welded with the steel pipe bridge pier butt joint interfaces.
Description
Technical Field
The utility model relates to a pedestrian overpass jacking technical field specifically is a ring steel construction box pedestrian overpass jacking structure.
Background
The pedestrian overpass is generally built in a place with large traffic flow and dense pedestrians, or on an intersection, a square and a railway, and only allows pedestrians to pass through the pedestrian overpass, so as to avoid conflict when traffic flow and pedestrian flow planes are intersected, ensure safe crossing of people, improve the speed of a vehicle, reduce traffic accidents, and be divided into three types according to structural differentiation. Some overpasses are also provided with elevators, which are convenient for the disabled to use. Some overpasses are provided with automatic pedestrian paths to reduce pedestrian distance, and some overpasses are covered, and some overpasses are sealed and have air conditioning.
According to the installation method of the ring steel structure box type pedestrian overpass in the industry at present, a temporary support frame is usually erected on site, a steel structure pier, a connecting steel platform and the ring steel structure box type pedestrian overpass are assembled into a whole in a segmented mode at high altitude, welding is completed at last, a conventional construction process is installed according to the ring steel structure box type pedestrian overpass, and due to the fact that steel columns, the connecting steel platform and the ring steel structure box type pedestrian overpass are limited in the segmented high-altitude assembling relative position, the ring steel structure box type pedestrian overpass is installed under the conventional construction process condition and has the following defects:
1. the condition that the air temperature is 15-18 ℃ for folding welding cannot be guaranteed, so that the internal stress of the round-ring steel structure box type pedestrian overpass exists;
2. due to the whole welding shrinkage and welding stress of the circular steel structure box type pedestrian overpass, the circular steel structure box type pedestrian overpass body between every two connecting steel platforms of the circular steel structure box type pedestrian overpass can not be guaranteed to meet the requirement of the designed camber;
3. welding shrinkage of the segmented circular steel structure box type pedestrian overpass causes dislocation of positions of the pedestrian overpass segments and the connecting steel platform interfaces, so that the quality of welding seams at the positions of the bridge segments and the connecting steel platform interfaces does not meet design requirements, and the stress of the welding seams is increased;
4. the diameter of the bridge body is reduced after the whole circular ring of the circular steel structure box type pedestrian overpass is welded, so that the positions of the connecting steel platform and the steel column interface are staggered, the quality of a welding seam at the positions of the platform and the steel column interface can not meet the design requirement, and the stress of the welding seam is increased;
5. the circular steel structure box type pedestrian bridge cannot meet the requirements of load tests (including static tests and natural vibration characteristic tests) on the whole.
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides a ring steel construction box pedestrian bridge jacking structure has solved because the restriction of the high altitude equipment relative position of steel column, connection steel platform and ring steel construction box pedestrian bridge segmentation to influence ring steel construction box pedestrian bridge equipment, arch camber and welded problem.
(II) technical scheme
The utility model provides a ring steel construction box pedestrian bridge jacking structure, specifically includes: steel pipe pier (1), each ring steel construction box pedestrian bridge segmentation (2), each connection steel platform (3), pontic temporary support (4), platform pier frame (5) constitute its characterized in that: the steel pipe bridge pier (1) is installed in place and welded and fixed, a series of bridge body temporary supports (4) and platform support frames (5) are arranged on the basis of installation positions of all circular steel structure box type passenger foot bridge sections (2) and all connecting steel platforms (3), all the circular steel structure box type passenger foot bridge sections (2) and all the connecting steel platforms (3) are assembled into a circular steel structure box type passenger foot bridge whole body (7), and all the connecting steel platforms (3) are welded with butt joint interfaces of the steel pipe bridge pier (1).
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a ring steel construction box pedestrian bridge jacking structure, specifically includes following step:
s1, firstly, installing the steel pipe bridge piers in place and welding and fixing the steel pipe bridge piers, and arranging a series of temporary bridge body supports and platform support supports by taking the installation positions of all circular steel structure box type pedestrian overpass sections and all connecting steel platforms as references;
s2, after each annular steel structure box type pedestrian overpass segment and each connecting steel platform are hoisted in place, each segmented annular steel structure box type pedestrian overpass segment and each connecting steel platform are assembled into an integral ring, and the bridge body segments, the bridge body and the bridge pier platforms are temporarily connected and fixed by bolts for primary integral jacking;
s3, after the first integral jacking is completed, circle finding and bridge levelness adjustment are carried out on the annular steel structure box type pedestrian overpass, the bridge is jacked for the second time by utilizing a bridge temporary support and a platform support, after the arch forming design requirement data is reached by secondary jacking, welding of each segmented annular steel structure box type pedestrian overpass is carried out, four large annular segments of the bridge are formed, and then welding of the four large annular segments of the bridge and each connecting steel platform is carried out under the appropriate temperature condition, so that the annular steel structure box type pedestrian overpass is formed integrally;
s4, carrying out first-time integral descending of the circular ring type circular ring steel structure box type pedestrian bridge;
and S5, according to the step S4, after the whole annular steel structure box type pedestrian overpass is wholly descended for the first time, immediately adjusting the position size of the butt joint interface of each connecting steel platform and the steel pipe pier, descending for the second time, and simultaneously welding the butt joint interfaces of each connecting steel platform and the steel pipe pier to finish secondary jacking installation construction of the bridge.
Preferably, in the step S3, the suitable temperature for welding the four large ring segments of the bridge body to the connecting steel platforms is 15-18 ℃.
Preferably, in the step S4, the whole circular ring type circular ring steel structure box type pedestrian bridge is lowered to the first jacking height of 30 mm.
Preferably, in step S1 and step S3, the temporary bridge support is provided with two brackets.
Preferably, in step S2, the height of the first integral jacking is 30 mm.
Preferably, in the steps S1 and S5, the steel pipe pier is mainly composed of a coping and a pier body.
(III) advantageous effects
The utility model provides a ring steel construction box passenger footbridge jacking structure. The method has the following beneficial effects: according to the jacking structure of the annular steel structure box type pedestrian overpass, through S1, steel pipe piers are installed in place and welded and fixed, and a series of temporary bridge body supports and platform supports are arranged on the basis of installation positions of all sections of the annular steel structure box type pedestrian overpass and all connecting steel platforms; s2, after each annular steel structure box type pedestrian overpass segment and each connecting steel platform are hoisted in place, each segmented annular steel structure box type pedestrian overpass segment and each connecting steel platform are assembled into an integral ring, and the bridge body segments, the bridge body and the bridge pier platforms are temporarily connected and fixed by bolts for primary integral jacking; s3, after the first integral jacking is completed, circle finding and bridge levelness adjustment are carried out on the annular steel structure box type pedestrian overpass, the bridge is jacked for the second time by utilizing a bridge temporary support and a platform support, after the arch forming design requirement data is reached by secondary jacking, welding of each segmented annular steel structure box type pedestrian overpass is carried out, four large annular segments of the bridge are formed, and then welding of the four large annular segments of the bridge and each connecting steel platform is carried out under the appropriate temperature condition, so that the annular steel structure box type pedestrian overpass is formed integrally; s4, carrying out first-time integral descending of the circular ring type circular ring steel structure box type pedestrian bridge; s5, according to S4, after the whole circular steel structure box type pedestrian bridge is wholly descended for the first time, immediately adjusting the size of the position of the butt joint interface of each connecting steel platform and the steel pipe pier, then descending for the second time, simultaneously, welding the connection steel platforms and the steel pipe pier butt joints to finish secondary jacking installation construction of the bridge, wherein the primary jacking aims to eliminate the limitation of the relative position of the steel columns, the connection steel platforms and the segmented high-altitude assembly of the segmented steel-structure box type passenger footbridge, the diameters of the segmented steel-structure box type passenger footbridge to be adjusted and the connection steel platforms are larger than the original design diameter, a margin is reserved for reducing the overall ring diameter after the welding shrinkage of the annular steel-structure box type passenger footbridge, and the secondary jacking aims to realize barrier-free and structure system hinged connection, the box-type pedestrian bridge with the sectional circular steel structure and the connecting steel platform are jacked to meet the requirement of design arching data.
Drawings
FIG. 1 is a layout view of a temporary bridge support and a platform pier support of the present invention;
FIG. 2 is a schematic diagram of the ring bridge body of the present invention showing the elevation required by the design of the ring bridge body segmentation and the arch-throwing;
FIG. 3 is a schematic diagram of the first jacking (30mm) of the circular bridge body of the present invention;
FIG. 4 is a schematic diagram of the second jacking of the circular bridge of the present invention;
FIG. 5 is a schematic view of the first landing of the circular bridge body of the present invention;
FIG. 6 is a schematic view of the circular bridge body of the present invention during the second landing;
fig. 7 is a structural layout view of temporary steel columns installed on the main bridge body according to the present invention;
fig. 8 is a view of the elevation structure of the shaft 1 and 2 of the present invention;
fig. 9 is a drawing showing the elevation structure of the shaft A, B according to the present invention.
In the figure: 1-steel pipe pier, 2-pedestrian overpass segment, 3-connecting steel platform, 4-bridge temporary support, 5-platform pier frame, 6-large ring segment and 7-overpass integral.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-9, an embodiment of the present invention provides a technical solution: the utility model provides a ring steel construction box pedestrian bridge jacking structure, the jacking purpose is in order to eliminate the steel column for the first time, connect steel platform 3 and 2 high altitude equipment relative position restrictions of ring steel construction box pedestrian bridge segmentation, let and wait to adjust segmentation ring steel construction box pedestrian bridge and be greater than former design diameter with connecting steel platform 3 diameter, whole ring diameter reduction leaves leeway behind the welding shrink of ring steel construction box pedestrian bridge, the jacking purpose of second time is for under accessible and the articulated condition of structure system, make jacking segmentation ring steel construction box pedestrian bridge and connecting steel platform 3 in order to reach design arching data requirement, specifically include following step:
s1, firstly, installing the steel pipe pier 1 in place and welding and fixing the steel pipe pier, and arranging a series of temporary bridge body supports 4 and platform support supports 5 by taking the installation positions of the circular steel structure box type pedestrian overpass sections 2 and the connecting steel platforms 3 as references;
s2, after each annular steel structure box type pedestrian overpass segment 2 and each connecting steel platform 3 are hoisted in place, each segmented annular steel structure box type pedestrian overpass segment 2 and each connecting steel platform 3 are assembled into an integral ring, and the bridge segments, the bridge bodies and the bridge pier platforms are temporarily connected and fixed by bolts to carry out first integral jacking;
s3, after the first integral jacking is completed, circle finding and bridge levelness adjustment are carried out on the annular steel structure box type passenger foot bridge, the bridge is jacked for the second time by utilizing the bridge temporary support 4 and the platform support 5, after the arch forming design requirement data is reached by the secondary jacking, welding of each segmented annular steel structure box type passenger foot bridge is carried out, four large annular segments 6 of the bridge are formed, and the four large annular segments 6 of the bridge are connected and welded with each connecting steel platform 3 under the appropriate temperature condition, so that the annular steel structure box type passenger foot bridge is integrally formed;
s4, descending the whole 7 of the annular ring steel structure box type pedestrian bridge for the first time;
and S5, according to the step S4, after the whole 7 of the annular steel structure box type pedestrian overpass descends for the first time, immediately adjusting the position and the size of the butt joint interface of each connecting steel platform 3 and the steel pipe pier 1, descending for the second time, and simultaneously welding the butt joint interface of each connecting steel platform 3 and the steel pipe pier 1 to finish the secondary jacking installation construction of the bridge.
In the utility model, in step S3, the proper temperature for the connection welding of the four large ring segments 6 of the bridge body and the connecting steel platforms 3 is 15-18 ℃.
The utility model discloses in, in step S4, the whole 7 descending of ring type ring steel construction box passenger footbridge is to jacking height 30mm for the first time.
The utility model discloses in, in step S1 and step S3, pontic temporary support 4 all is provided with two brackets, and two brackets are because the high restriction of various types hydraulic jack-up (the biggest jack-up height of 30 tons jack 180mm) to in-process jack-up height can not satisfy the replacement of jack position when jacking stroke (being greater than 200mm) requires in the jacking, reach design jacking elevation requirement.
The utility model discloses in, in step S2, the height of first whole jacking is 30 mm.
The utility model discloses in, in step S1 and step S5, steel pipe pier 1 mainly comprises hood and pier shaft, the effect of hood is the great and concentrated power that the bridge span support was transmitted, disperse and transmit pier shaft and platform body neatly, consequently, the hood should adopt the higher material building of intensity, generally use not less than 200 grades of reinforced concrete building, and thickness is not less than 40 centimetres, in addition, the hood still must have great plane size, it provides necessary working face to construct the frame roof beam and maintain, pier shaft and platform body are the major structure who supports the bridge span, not only bear the whole loads that the bridge span structure transmitted, and also directly bear soil pressure, water impact force, ice pressure, multiple loads such as boats and ships impact force, so pier shaft and platform body all have sufficient intensity, rigidity and stability.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a ring steel construction box pedestrian bridge jacking structure, specifically includes: steel pipe pier (1), each ring steel construction box pedestrian bridge segmentation (2), each connection steel platform (3), pontic temporary support (4), platform pier frame (5) constitute its characterized in that: each ring steel structure box type pedestrian overpass subsection (2) and each connecting steel platform (3) are assembled into a ring steel structure box type pedestrian overpass whole body (7), and each connecting steel platform (3) is welded with a butt joint interface of the steel pipe pier (1).
2. The jacking structure of the circular steel structure box type pedestrian overpass of claim 1, which is characterized in that: the bridge temporary support (4) is provided with two brackets.
3. The jacking structure of the circular steel structure box type pedestrian overpass of claim 1, which is characterized in that: the steel pipe pier (1) mainly comprises a top cap and a pier body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922187546.3U CN212561170U (en) | 2019-12-09 | 2019-12-09 | Ring steel structure box pedestrian bridge jacking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922187546.3U CN212561170U (en) | 2019-12-09 | 2019-12-09 | Ring steel structure box pedestrian bridge jacking structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212561170U true CN212561170U (en) | 2021-02-19 |
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ID=74618758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922187546.3U Expired - Fee Related CN212561170U (en) | 2019-12-09 | 2019-12-09 | Ring steel structure box pedestrian bridge jacking structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212561170U (en) |
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2019
- 2019-12-09 CN CN201922187546.3U patent/CN212561170U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |