CN211947993U - Support for large-span cast-in-situ bridge construction - Google Patents
Support for large-span cast-in-situ bridge construction Download PDFInfo
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- CN211947993U CN211947993U CN202020382900.8U CN202020382900U CN211947993U CN 211947993 U CN211947993 U CN 211947993U CN 202020382900 U CN202020382900 U CN 202020382900U CN 211947993 U CN211947993 U CN 211947993U
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Abstract
The utility model discloses support is used in cast-in-place bridge construction of large-span belongs to bridge construction field, and the purpose is solved current support poor stability and the inconvenient problem of longitudinal gradient, cross slope regulation. The steel pipe column foundation comprises a foundation, a steel pipe column arranged on the foundation and a steel platform supported at the top end of the steel pipe column; the foundation comprises a bearing platform and a pile foundation which are arranged at the positions of the pier studs and a bar foundation which is arranged at the midspan position of two adjacent pier studs; connecting the steel pipe columns by adopting a longitudinal horizontal support frame along the longitudinal direction of the bridge; the adjacent steel pipe columns are connected by adopting a transverse horizontal support frame along the transverse direction of the bridge; and a full scaffold is erected on the steel platform. The utility model discloses, through adopting the steel-pipe pile to add the structure that the steel platform adds the full hall scaffold frame, longitudinal gradient, cross slope are adjusted through the full hall scaffold frame for the steel platform can be in the horizontality all the time, and mechanical properties is good, safe and reliable. The steel platform is supported at the midspan position, so that the deflection of the steel platform is reduced, and the overall stability of the support is improved.
Description
Technical Field
The utility model belongs to bridge construction field, specific is support is used in the construction of the cast-in-place bridge of large-span.
Background
Along with the continuous construction of the infrastructure in China, the cast-in-place continuous box girder technology is more and more widely applied to municipal bridge and highway bridge engineering, the construction topography of individual bridges is complex, if the construction process adopts the traditional cast-in-place full-space supporting system construction technology, the investment is large, the cost is high, the construction period is long, the safety risk is large, and if the steel pipe pile combined support is constructed, the construction period can be further reduced, and the cost is saved. At present, a steel pipe pile combined support usually takes a pier bearing platform as a foundation, a steel pipe column is arranged on the pier bearing platform, a Bailey beam is arranged at the top of the steel pipe column, and concrete box girder pouring is completed through Bailey beam supporting. However, this structure has the following drawbacks:
firstly, for an ultrahigh structure, the height of a steel pipe column is high, and the requirement on the stability of the steel pipe pile is low; for a structure with a large span between adjacent piers, the Bailey beam has large deflection and poor stability;
secondly, this if the bridge has the vertical and horizontal slope, there is very big horizontal migration risk in the regulation of steel-pipe pile top elevation, needs to adopt the adjustment of height steel-pipe column, and whole vertical and horizontal slope can't be guaranteed, and because the atress is inhomogeneous, there is horizontal thrust superstructure when concreting, and horizontal slip phenomenon will appear in whole bei lei liang system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a support is used in cast-in-place bridge construction of large-span solves current support poor stability and the inconvenient problem of longitudinal gradient, cross slope regulation.
The utility model adopts the technical proposal that: the support for the construction of the large-span cast-in-place bridge comprises a foundation, a steel pipe column arranged on the foundation and a steel platform supported at the top end of the steel pipe column; the foundation comprises a bearing platform and a pile foundation which are arranged at the positions of the pier studs and a bar foundation which is arranged at the midspan position of two adjacent pier studs;
connecting the steel pipe columns by adopting a longitudinal horizontal support frame along the longitudinal direction of the bridge; the adjacent steel pipe columns are connected by adopting a transverse horizontal support frame along the transverse direction of the bridge;
and a full scaffold is erected on the steel platform.
Furthermore, steel plates are pre-embedded on the bearing platform and the strip foundation, the bottom end of the steel pipe column is connected with the steel plates in a welding mode, and a plurality of stiffening plates are uniformly arranged around the periphery of the steel pipe column.
Further, the steel platform comprises a bottom distribution beam, a Bailey beam and a top distribution beam;
the bottom distribution beam is fixedly connected to the top of the steel pipe column;
the bottom distribution beams are arranged at the splicing positions of two adjacent Bailey beams along the longitudinal direction of the bridge and are arranged along the transverse full length of the bridge;
the top distribution beams are supported at the tops of the Bailey beams, the top distribution beams are arranged at the splicing positions of two adjacent Bailey beams along the longitudinal direction of the bridge, and the top distribution beams are arranged along the transverse full length of the bridge.
Furthermore, at the position of the pier stud, the bottom distribution beam is composed of two I-shaped steels arranged side by side, and the two I-shaped steels are symmetrical about the central line of the splicing joint of the Bailey beam; at the midspan position of two adjacent pier studs, the bottom distribution beam is three I-beams arranged side by side, and the three I-beams are symmetrical about the central line of the splicing joint of the Bailey beam.
Furthermore, a U-shaped bolt is arranged between the Bailey beam and the bottom distribution beam, one end of the U-shaped bolt penetrates through a lower chord of the Bailey beam and is combined with a nut, the other end of the U-shaped bolt penetrates through a lower chord of an adjacent Bailey beam and is combined with a nut, and the bottom distribution beam is accommodated in an enclosed area of the lower chord of the Bailey beam and the U-shaped bolt.
Furthermore, a bottom support and a pulley are arranged at the bottom of the scaffold; the scaffold is formed by erecting steel pipes; the bottom support is arranged at the bottom end of the steel pipe and is movably connected with the steel pipe along the vertical direction; the pulleys are arranged at the bottom end of the steel pipe, at least two bottom supports are arranged between every two adjacent pulleys, and the heights of the pulleys are flush with or higher than the height of the bottom supports after the bottom supports are extended to the limit.
The utility model has the advantages that: the utility model discloses, through adopting the steel-pipe pile to add the structure that the steel platform adds the full hall scaffold frame, longitudinal gradient, cross slope are adjusted through the full hall scaffold frame for the steel platform can be in the horizontality all the time, and mechanical properties is good, safe and reliable.
The steel platform is supported at the midspan position, so that the deflection of the steel platform is reduced, and the overall stability of the support is improved.
Through the pulley of full hall scaffold bottom and the setting of collet, can whole translation full hall scaffold for the work load that the support was set up reduces, and the time shortens.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is a schematic view of the connection of a Bailey beam to a bottom distribution beam;
FIG. 5 is a front view of the scaffolding base structure;
fig. 6 is a left side view of the scaffolding base structure.
In the figure, a pile foundation 1, a bearing platform 2, a strip foundation 3, a steel pipe column 4, a longitudinal horizontal support frame 5, a transverse horizontal support frame 6, a steel plate 7, a stiffening plate 8, a bottom distribution beam 9, a Bailey beam 10, a top distribution beam 11, a U-shaped bolt 12, a nut 13, a lower chord 14, a scaffold 15, a pulley 16 and a bottom support 17.
Detailed Description
The invention is further described below with reference to the following figures and examples:
the support for the construction of the large-span cast-in-place bridge comprises a foundation, a steel pipe column 4 arranged on the foundation and a steel platform supported at the top end of the steel pipe column 4, as shown in fig. 1, 2 and 3; the foundation comprises a bearing platform 2 and a pile foundation 1 which are arranged at the positions of the pier studs, and a strip foundation 3 which is arranged at the midspan position of two adjacent pier studs; the steel pipe columns 4 are connected by adopting a longitudinal horizontal support frame 5 along the longitudinal direction of the bridge; the adjacent steel pipe columns 4 are connected by adopting a transverse horizontal support frame 6 along the transverse direction of the bridge; and a full hall scaffold 15 is erected on the steel platform.
The utility model discloses a support is used in cast-in-place bridge construction of large-span, through the bar basis 3 of striding the well position at two adjacent pier studs, be provided with steel-pipe column 4 on the bar basis 3 for not only in pier stud position, still support the steel platform in striding the well position, reduced the amount of deflection of steel platform, improved the overall stability of support. By erecting the full framing scaffold 15 on the steel platform, firstly, the height of the steel pipe column 4 is favorably shortened, and the stability of the steel pipe column 4 is improved; secondly, the steel platform is in the horizontality all the time, and mechanical properties is good, to the regulation of longitudinal gradient and cross slope, can adjust through full hall scaffold frame 15, adjusts convenient, safe and reliable. Through the arrangement of the longitudinal horizontal support frame 5 and the transverse horizontal support frame 6, the steel pipe columns 4 are connected together, the rigidity of the steel pipe columns 4 is improved, and the overall stability of the support is guaranteed. In this embodiment, for a steel pipe pile with a height of more than 20m, a longitudinal horizontal support frame 5 and a transverse horizontal support frame 6 are required to be added every 8m to serve as horizontal supports.
In order to facilitate the connection of the foundation and the steel pipe column 4, preferably, steel plates 7 are pre-embedded in the bearing platform 2 and the strip foundation 3, the bottom end of the steel pipe column 4 is connected with the steel plates 7 in a welding mode, and a plurality of stiffening plates 8 are uniformly arranged around the periphery of the steel pipe column 4.
The steel pipe column 4 is formed by splicing multiple sections, the first section of steel pipe column 4 is used as an elevation adjusting section, the height and the verticality must be controlled, the first section of steel pipe column 4 and the embedded steel plate 7 are welded, and 8 reinforcing plates 8 are additionally arranged; and 4 sections of the steel pipe column at the second section and above adopt standard sections, the connection adopts flange connection, and the number of the connecting bolts is not less than 8.
To further ensure the stability of the structure, it is preferred that the steel platform comprises a bottom distribution beam 9, a beret beam 10 and a top distribution beam 11; the bottom distribution beam 9 is fixedly connected to the top of the steel pipe column 4; the Bailey beams 10 are supported on the bottom distribution beams 9, and the bottom distribution beams 9 are positioned at the splicing positions of two adjacent Bailey beams 10 along the longitudinal direction of the bridge and are arranged along the transverse full length of the bridge; the top distribution beams 11 are supported on the tops of the beret beams 10, the top distribution beams 11 are arranged at the splicing positions of two adjacent beret beams 10 along the longitudinal direction of the bridge, and the top distribution beams 11 are arranged along the transverse full length of the bridge.
In order to make the supporting strength of the bailey beams 10 at each position tend to be consistent, preferably, at the pier column position, the bottom distribution beam 9 is two i-beams arranged side by side, and the two i-beams are symmetrical about the center line of the splicing joint of the bailey beams 10; at the midspan position of two adjacent pier studs, the bottom distribution beam 9 is three h-beams arranged side by side, and the three h-beams are symmetrical about the central line of the splicing joint of the Bailey beam 10. The Bailey beam 10 is supported by the three I-shaped steels arranged in the span, so that the deflection of the Bailey beam 10 is reduced.
As shown in fig. 4, a U-shaped bolt 12 is disposed between the bery beam 10 and the bottom distribution beam 9, one end of the U-shaped bolt 12 passes through the lower chord 14 of the bery beam 10 and is coupled with a nut 13, the other end passes through the lower chord 14 of the adjacent bery beam 10 and is coupled with the nut 13, and the bottom distribution beam 9 is accommodated in the surrounding area of the lower chord 14 of the bery beam 10 and the U-shaped bolt 12.
The bottom distribution beam 9 is connected with the lower chord 14 of the Bailey beam 10 through the U-shaped bolt 12, mounting holes and the like do not need to be processed on the bottom distribution beam 9 or the Bailey beam 10, and the bottom distribution beam 9 and the Bailey beam 10 can be conveniently disassembled and assembled.
In order to facilitate the pushing of the scaffold 15 as a whole, it is preferable that, as shown in fig. 5 and 6, a bottom support 17 and pulleys 16 are provided at the bottom of the scaffold 15; the scaffold 15 is formed by erecting steel pipes; the bottom support 17 is arranged at the bottom end of the steel pipe and is movably connected with the steel pipe along the vertical direction; the pulleys 16 are arranged at the bottom end of the steel pipe, at least two bottom supports 17 are arranged between every two adjacent pulleys 16, and the height of each pulley 16 is flush with or higher than the height of each bottom support 17 after the pulley 16 is extended to the limit.
In this configuration, the mounting 7 is supported in an extended manner on the top distribution beam 11 during use. When half a construction finishes, need carry out another half a construction, pack up collet 7, make collet 7 lift off top distribution roof beam 11, pulley 16 still supports in top distribution roof beam 11, then regard top distribution roof beam 11 as the track, along top distribution roof beam 11 extending direction, promote full hall scaffold 15 to another half a construction. Thereby make full hall scaffold 15 can wholly follow left right width translation to another width or next working section and use, the steel-pipe pile can reuse, shifts to next working face, and the transfer in-process, work load reduces, and the time shortens.
Claims (6)
1. The support for the construction of the large-span cast-in-place bridge comprises a foundation, a steel pipe column (4) arranged on the foundation and a steel platform supported at the top end of the steel pipe column (4); the method is characterized in that:
the foundation comprises a bearing platform (2) and a pile foundation (1) which are arranged at the positions of the pier columns, and a strip foundation (3) which is arranged at the midspan position of two adjacent pier columns; the steel pipe columns (4) are connected by adopting a longitudinal horizontal support frame (5) along the longitudinal direction of the bridge; the adjacent steel pipe columns (4) are connected by adopting a transverse horizontal support frame (6) along the transverse direction of the bridge; and a full scaffold (15) is erected on the steel platform.
2. The support for the construction of the large-span cast-in-place bridge according to claim 1, wherein: steel plates (7) are pre-embedded in the bearing platform (2) and the strip foundation (3), the bottom end of the steel pipe column (4) is connected with the steel plates (7) in a welding mode, and a plurality of stiffening plates (8) are uniformly arranged around the periphery of the steel pipe column (4).
3. The support for the construction of the large-span cast-in-place bridge according to claim 1 or 2, wherein: the steel platform comprises a bottom distribution beam (9), a Bailey beam (10) and a top distribution beam (11);
the bottom distribution beam (9) is fixedly connected to the top of the steel pipe column (4);
the Bailey beams (10) are supported on the bottom distribution beams (9), and the bottom distribution beams (9) are positioned at the splicing positions of two adjacent Bailey beams (10) along the longitudinal direction of the bridge and are arranged along the transverse full length of the bridge;
the top distribution beams (11) are supported at the tops of the Bailey beams (10), the top distribution beams (11) are arranged at the splicing positions of two adjacent Bailey beams (10) along the longitudinal direction of the bridge, and the top distribution beams (11) are arranged along the transverse full length of the bridge.
4. The support for the construction of the large-span cast-in-place bridge according to claim 3, wherein: at the position of the pier stud, the bottom distribution beam (9) is two I-shaped steels arranged side by side, and the two I-shaped steels are symmetrical about the central line of a splicing joint of the Bailey beam (10); at the midspan position of two adjacent pier studs, the bottom distribution beam (9) is three I-beams arranged side by side, and the three I-beams are symmetrical about the center line of the splicing joint of the Bailey beam (10).
5. The support for the construction of the large-span cast-in-place bridge according to claim 3, wherein: a U-shaped bolt (12) is arranged between the Bailey beam (10) and the bottom distribution beam (9), one end of the U-shaped bolt (12) penetrates through a lower chord (14) of the Bailey beam (10) to be combined with a nut (13), the other end of the U-shaped bolt (12) penetrates through a lower chord (14) of an adjacent Bailey beam (10) to be combined with a nut (13), and the bottom distribution beam (9) is accommodated in an enclosed area of the lower chord (14) of the Bailey beam (10) and the U-shaped bolt (12).
6. The support for the construction of the large-span cast-in-place bridge according to claim 1 or 2, wherein: a bottom support (17) and a pulley (16) are arranged at the bottom of the scaffold (15); the scaffold (15) is formed by erecting steel pipes; the bottom support (17) is arranged at the bottom end of the steel pipe and is movably connected with the steel pipe along the vertical direction; the pulleys (16) are arranged at the bottom ends of the steel pipes, at least two bottom supports (17) are arranged between every two adjacent pulleys (16), and the heights of the pulleys (16) are flush with or higher than the height of the bottom supports (17) after the bottom supports are extended to the limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020382900.8U CN211947993U (en) | 2020-03-23 | 2020-03-23 | Support for large-span cast-in-situ bridge construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020382900.8U CN211947993U (en) | 2020-03-23 | 2020-03-23 | Support for large-span cast-in-situ bridge construction |
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| CN211947993U true CN211947993U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020382900.8U Active CN211947993U (en) | 2020-03-23 | 2020-03-23 | Support for large-span cast-in-situ bridge construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000540A (en) * | 2021-12-08 | 2022-02-01 | 北京市市政四建设工程有限责任公司 | Ramp bridge combined supporting system constructed in parallel with underground complex and construction method |
| CN114000542A (en) * | 2021-12-08 | 2022-02-01 | 北京市市政四建设工程有限责任公司 | Steel pipe column and Bailey beam combined supporting structure and supporting method |
-
2020
- 2020-03-23 CN CN202020382900.8U patent/CN211947993U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000540A (en) * | 2021-12-08 | 2022-02-01 | 北京市市政四建设工程有限责任公司 | Ramp bridge combined supporting system constructed in parallel with underground complex and construction method |
| CN114000542A (en) * | 2021-12-08 | 2022-02-01 | 北京市市政四建设工程有限责任公司 | Steel pipe column and Bailey beam combined supporting structure and supporting method |
| CN114000540B (en) * | 2021-12-08 | 2024-01-19 | 北京市市政四建设工程有限责任公司 | Ramp bridge combined support system built in parallel with underground complex and building method |
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