CN215405609U - Steel box girder pushing construction structure - Google Patents
Steel box girder pushing construction structure Download PDFInfo
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- CN215405609U CN215405609U CN202120286463.4U CN202120286463U CN215405609U CN 215405609 U CN215405609 U CN 215405609U CN 202120286463 U CN202120286463 U CN 202120286463U CN 215405609 U CN215405609 U CN 215405609U
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Abstract
The utility model provides a steel box girder pushing construction structure, which comprises a LY (Linear)1‑LZ1、LY2‑LZ2……LYn‑LZnThe temporary buttress is organized, and every group temporary buttress includes 2 temporary buttress units, the temporary buttress unit includes first temporary buttress unit and the temporary buttress unit of second, sets up first temporary buttress unit in permanent mound periphery, at permanent mound adjacent distance>A second temporary buttress unit is arranged between the permanent piers of 60-80 m, and the first temporary buttress unitThe top of the unit and the top of the second temporary buttress unit are respectively and correspondingly provided with a beam A and a beam B, and thrusting devices are arranged on the beam A and the beam B. The temporary buttress is added on the basis of the original permanent pier to support the pushing devices, so that the distance between the pushing devices is reduced, the construction risk and the construction difficulty caused by the overlarge span of the steel box girder are reduced, and the smooth pushing of the bridge is ensured.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a steel box girder pushing construction structure.
Background
At present, in the construction of large-span bridges, steel box girders are applied more and more, and with the prevalence of steel box girder bridges, the jacking construction technology is also concerned about and deeply studied in the field of bridge construction. The pushing method construction technology is fast and convenient, labor and equipment are greatly saved, the horizontal force of the reciprocation generated by the pier body when the beam body is pushed is overcome, the displacement of the pier top can be reduced to the minimum by continuous pushing, and the construction quality of the bridge body is guaranteed.
The steel box girder incremental launching temporary buttress construction generally appears in a bridge with large span and limited site, is suitable for industrial manufacture, needs to be provided with a corresponding supporting structure for supporting a slideway and an incremental launching device required by steel box girder incremental launching, and needs to be additionally provided with a supporting structure to meet the requirement of incremental launching construction if the original permanent pier of the bridge is not enough to meet the supporting strength.
SUMMERY OF THE UTILITY MODEL
The utility model provides a steel box girder pushing construction structure, which is characterized in that a temporary buttress is added on the basis of an original permanent pier to support a pushing device, so that the distance between the pushing device is reduced, the construction risk and the construction difficulty caused by overlarge span of a steel box girder are reduced, and the smooth pushing of a bridge is ensured.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a steel box girder pushing construction structure comprises a LY1-LZ1、LY2-LZ2……LYn-LZnGroup temporaryButtresses, each group of temporary buttresses comprising 2 temporary buttress units, wherein, LY1-LZ1、LY2-LZ2The temporary buttress groups are used for arranging a welding platform and a coating repairing and overhauling platform, and the other temporary buttress groups are used for supporting the pushing device and the steel box girder;
the temporary buttress units comprise a first temporary buttress unit and a second temporary buttress unit, the first temporary buttress unit is arranged on the periphery of the permanent pier, and the second temporary buttress unit is arranged between the permanent piers with the adjacent distance of more than 60-80 m; the top of the first temporary buttress unit and the top of the second temporary buttress unit are respectively and correspondingly provided with a beam A and a beam B, and thrusting devices are arranged on the beam A and the beam B.
Further, the first temporary buttress unit further comprises four steel pipe columns A and transverse connection A, the four steel pipe columns A are enclosed into a cube, adjacent steel pipe columns A are connected through a plurality of groups of transverse connection A, the top end of each steel pipe column A is provided with 4 spliced I-shaped steel serving as a cross beam A, and the cross beam A is used for supporting the pushing device.
Further, the second temporary buttress unit further comprises four steel pipe columns B and transverse connection B, the four steel pipe columns B are formed in a cube shape in an enclosed mode, adjacent steel pipe columns B are connected through a plurality of groups of transverse connection B, and long steel boxes are arranged at the top ends of every two steel pipe columns B in the direction in which the pushing devices are placed and serve as cross beams B.
Furthermore, a reinforced concrete expansion foundation is arranged at the lower part of the second temporary buttress unit.
Furthermore, the second temporary buttress unit is connected with the first temporary buttress unit closest to the second temporary buttress unit through the lateral connection of the buttress units.
Further, the front end road surface and the LY1-LZ1A welding platform is arranged between the temporary buttress groups, a welding platform supporting device is arranged below the welding platform, the welding platform supporting device comprises more than two spans of upright post units A, and each span of upright post unit A comprises at least 4 steel pipe upright posts A; every 2 steel pipe columns A are used as a group of welding platform supporting units and a group of weldingA transverse connection C is arranged between the inner sides of steel pipe stand columns A in the platform supporting unit for connection, an inclined strut A is connected to the outer side of the platform supporting unit, and the outer end of the inclined strut A is connected with the welding platform.
Further, said LY1-LZ1、LY2-LZ2Be provided with between the interim buttress of group and mend and scribble the maintenance platform, mend and scribble and install below the maintenance platform and mend and scribble maintenance platform strutting arrangement, mend and scribble maintenance platform strutting arrangement including two stand unit B more than striding, every is striden stand unit B and scribble maintenance platform strutting arrangement including 6 at least steel pipe stand B, every 3 steel pipe stand B scribbles maintenance platform strutting arrangement as a set of benefit, a set of benefit is scribbled and is provided with transverse connection D between the steel pipe stand B inboard in the maintenance platform strutting arrangement and connect, the outside is connected with bracing B, bracing B's outer end and mend and scribble maintenance platform and be connected.
The pushing device comprises two sliding boxes, two pushing slideways, two jacking jacks, two translation jacks and two deviation rectifying jacks, the two pushing slideways are symmetrically arranged and placed on the cross beam A or the cross beam B, the sliding boxes can be matched and slide on the pushing slideways, the translation jacks are arranged at the two ends of each sliding box and can control the sliding boxes to move forwards and backwards, the inner sides of the two sliding boxes are connected through deviation rectifying connecting rods, and the two outer ends of each sliding box are respectively provided with the deviation rectifying jacks; and the jacking jack is used for adjusting the upper position and the lower position of the steel box girder in a matching manner.
The steel box girder pushing construction structure supports the pushing device by arranging the temporary buttress, each component in the temporary buttress is pre-processed and manufactured by special equipment in a specialized factory, is not limited by seasons, and has the advantages of high processing and manufacturing speed, high precision and easy quality control, so that the supporting strength of the pushing device and the steel box girder can be ensured by better combining the permanent buttress, and the construction safety is ensured.
According to the utility model, the second temporary buttress unit is arranged between the permanent piers with the adjacent distance of more than 60-80 m, so that a temporary supporting structure can be added between the permanent piers with large span, and the problem caused by large span in the pushing process is solved, thereby reducing the risk and difficulty of construction, ensuring the smooth construction, and better controlling the line type of the bridge.
Drawings
Fig. 1 is a schematic view of the arrangement of temporary piers (left panel).
Fig. 2 is a front view structural schematic diagram of the first temporary pier unit.
Fig. 3 is a left side view of the structure of fig. 2.
Fig. 4 is a front view structural schematic diagram of the second temporary pier unit.
Fig. 5 is a left side view of the structure of fig. 4.
Fig. 6 is a cross-sectional structural diagram of the welding platform supporting device.
FIG. 7 is a cross-sectional structural schematic view of the repainting maintenance platform support device.
FIG. 8 is a schematic longitudinal section structure view of the support device of the repair coating maintenance platform.
Fig. 9 is a schematic perspective view of the pushing device.
LY2-LZ2Assembling temporary buttresses 1, LY3-LZ3Set of temporary piers 2, LY4-LZ4Set of temporary piers 3, LY5-LZ5Set of temporary buttresses 4, LY6-LZ6Set of temporary buttresses 5, LY7-LZ7Set of temporary abutments 6, LY8-LZ8The steel box girder comprises a temporary buttress group 7, a buttress unit transverse connection 8, a steel box girder 9, a steel pipe column A10, a transverse connection A11, a cross beam A12, a steel box pad beam A13, a jacking device 14, a steel pipe column B15, a transverse connection B16, a cross beam B17, a steel box pad beam B18, a reinforced concrete enlarged foundation 19, an inclined strut A20, a steel pipe column A21, a transverse connection C22, a welding platform 23, a slide way 24, a transverse connection D25, a steel pipe column B26, an inclined strut B27, a coating repair and maintenance platform 28, a jacking jack 29, a deviation-correcting connecting rod 30, a deviation-correcting jack 31, a translation jack 32, a slide box 33 and a jacking slide way 34.
Detailed Description
The present invention is further illustrated by the following specific examples, but the scope of the present invention is not limited to the following examples.
A steel box girder pushing construction structure comprises a LY1-LZ1、LY2-LZ2……LYn-LZnThe temporary buttresses are set, 8 groups of temporary buttresses are provided in the embodiment, 7 groups are shown in fig. 1, specifically LY1-LZ1Assembling temporary buttresses, LY2-LZ2Group temporary buttress 1, LY3-LZ3Group temporary buttress 2, LY4-LZ4Group temporary buttress 3, LY5-LZ5Group temporary buttress 4, LY6-LZ6Group of temporary buttresses 5, LY7-LZ7Group of temporary buttresses 6, LY8-LZ8Temporary buttresses 7 are grouped, each group of temporary buttresses comprising 2 temporary buttress units, LY1-LZ1、LY2-LZ2The temporary buttresses are used for arranging the welding platform 23 and the coating repair platform 28, and the other temporary buttresses are used for supporting the thrusting device 14 and the steel box girder 9, specifically, the temporary buttresses are arranged on the front end road surface and the LY1-LZ1A welding platform 23 is arranged between the temporary buttresses, and is arranged at LY1-LZ1、LY2-LZ2And a coating repairing maintenance platform 28 is arranged between the temporary buttresses, and the mounting mode generally adopts welding. The temporary buttress unit comprises a first temporary buttress unit and a second temporary buttress unit, wherein the first temporary buttress unit is arranged at the periphery of the permanent pier of the bridge, and the adjacent distance between the permanent piers is>A second temporary buttress unit is arranged between the permanent piers of 60-80 m, and the adjacent distance between the permanent piers is selected according to the bridge span and the weight of the steel box girder of the embodiment>A second temporary pier unit is arranged between the permanent piers of 75m, wherein, LY4-LZ4Group of temporary piers 3 and LY6-LZ6The group temporary buttresses 5 each comprise two second temporary buttress units. The top of the first temporary buttress unit and the top of the second temporary buttress unit are respectively and correspondingly provided with a beam A and a beam B, and thrusting devices are arranged on the beam A and the beam B and used for thrusting the steel box girder to slide forwards.
Further, as shown in fig. 2 and 3, the first temporary buttress unit further includes four steel pipe columns a10 and transverse connection a11, the steel pipe columns a10 are arranged to form a cube, adjacent steel pipe columns a10 are connected by a plurality of groups of transverse connection a11, the top end of each steel pipe column a10 is provided with 4-spliced I45 h-shaped steel as a beam a12, and the beam a12 is used for supporting the thruster 14, specifically: one end of the beam A12 is connected with a pier body embedded part of the permanent pier in a welding mode and is used for supporting the pushing device 14, 2 layers of steel box filler beams A13 are placed on the top of the beam A12, and a poly tetra ethylene hard plastic plate is placed on the top surface of the steel box filler beam A13 and is used for placing the steel box girder 9. In order to facilitate the connection of the beam A12 and the pier body embedded part, the two beams A12 along the direction of the placement of the jacking device 14 are not connected, and a space is reserved between the two beams A12, and the beam A12 utilizes the supporting force of the pier body embedded part, so that the beam A12 can meet the requirement of supporting the jacking device 14. For the transverse connection A11, steel pipes with the diameter of 325 multiplied by 6mm are adopted for transverse connection, and steel pipes with the diameter of 325 multiplied by 6mm are adopted for vertical and oblique connection by adopting 10 channel steel.
Further, as shown in fig. 4 and 5, the second temporary buttress unit further includes four steel pipe columns B15 and transverse connection B16, the number of the steel pipe columns B15 is four, the steel pipe columns B15 are formed into a cube, adjacent steel pipe columns B15 are connected through a plurality of groups of transverse connection B16, and an elongated steel box serving as a cross beam B17 is arranged at the top end of each two steel pipe columns B15 along the direction in which the thrusters 14 are placed, and is used for supporting the thrusters 14. The single side of the pushing device 14 is placed on the beam B17 in the center, the steel box pad beams B18 are placed on the two sides of the beam, and the top surface of the steel box pad beam B18 is provided with a poly tetra ethyl ethylene hard plastic plate for placing the steel box beam 9. Since the beam B17 cannot support the permanent pier, the long steel box is required to support the pushing device 14 integrally, so as to ensure the pushing safety. For the transverse connection B16, steel pipes with the diameter of 325 multiplied by 6mm are adopted for transverse connection, and steel pipes with the diameter of 325 multiplied by 6mm are adopted for vertical and oblique connection by adopting 10 channel steel. Further, in order to secure the stability of the second temporary pier unit, a reinforced concrete enlarged foundation 19 is provided at the lower portion of the second temporary pier unit.
In order to better ensure the stability and safety of the second temporary buttress unit, as shown in fig. 1, the second temporary buttress unit is connected with the first temporary buttress unit which is closest to the second temporary buttress unit through the lateral connection of the buttress units.
Further, front end road surface and LY1-LZ1A welding platform is arranged below the welding platform 23 arranged between the temporary buttressesThe supporting device, the welding platform 23, includes two or more vertical column units a, the present embodiment is provided with 5 spans altogether, as shown in fig. 6, each span vertical column unit a includes at least 4 steel pipe vertical columns a21, the steel pipe vertical columns a21 are set up by using phi 630 × 10mm steel pipes; every 2 steel pipe stands A21 are as a set of welded platform support unit, and the steel pipe stand A21 in a set of welded platform support unit is provided with horizontal connection C22 between the inboard and is connected, and the outside is connected with bracing A20, and the outer end and the welded platform 23 of bracing A20 are connected. For the transverse connection C22, transverse connection is performed by adopting I20 channel steel, and oblique connection is performed between two ends of I20 channel steel by adopting 14 channel steel. The slideway 24 is arranged on the welding platform 23, and the arrangement position of the steel pipe upright A21 corresponds to the position right below the slideway 24. LY (LY)1-LZ1The group of temporary buttresses is also supported with thrusters.
Further, as shown in fig. 7 and 8, a repair coating maintenance platform 28, LY, is arranged behind the welding platform 231-LZ1、LY2-LZ2Set up between and mend and scribble maintenance platform 28, mend and scribble and install below maintenance platform 28 and mend and scribble maintenance platform strutting arrangement, mend and scribble maintenance platform strutting arrangement and including two stand unit B that stride more than, this embodiment is provided with 3 strides, every stride stand unit B is including 6 at least steel pipe stand B26, every 3 steel pipe stand B26 are as a set of maintenance platform 28 supporting unit of mending, it connects to be provided with horizontal connection D25 between the steel pipe stand B26 inboard in a set of maintenance platform 28 supporting unit of mending, the outside is connected with bracing B27, the outer end and the maintenance platform 28 of mending of bracing B27 are connected. Steel pipe stand B26 adopts the 630 mm by 10mm steel pipe of phi to set up, to horizontal connection D25, including adopting I20 channel-section steel to carry out transverse connection, adopts and carries out the slant between I20 channel-section steel both ends and connects, and the steel pipe stand is located on the bar basis. The repair coating maintenance platform 28 comprises a repair coating maintenance platform cross beam, a repair coating maintenance platform distribution beam and a pattern steel plate, wherein I56a double-spliced I-shaped steel serving as the repair coating maintenance platform cross beam is arranged at the top of a steel pipe upright post B26, I20 channel steel distribution beams are arranged in other areas except a slideway 24 area, and the pattern steel plate with the thickness of 6mm is fully paved above the distribution beams. A second temporary buttress can be arranged below the connecting position of the welding platform 23 and the coating repair platform 28A unit for supporting the thruster 14, the second temporary buttress unit, the pillar unit B, LY2-LZ2The transverse connection strengthening connection can be arranged between the two parts according to the requirement. LY (LY)2-LZ2The group of temporary buttresses is also supported with thrusters. In fig. 7, the left side shows a schematic diagram of the steel box girder 9 pushed along the slide way, and the right side shows a cast-in-place concrete continuous beam formed at the front end part of the cast bridge span after the pushing of the subsequent steel box girder 9 is completed.
The embodiment also specifically provides a jacking device 14 convenient for jacking the steel box girder, as shown in fig. 9, the jacking device comprises two sliding boxes 33, jacking slideways 34, jacking jacks 29, translation jacks 32 and deviation-correcting jacks 31, the jacking slideways 34 are symmetrically arranged and placed on a cross beam a12 or a cross beam B17, the sliding boxes 33 can slide on the jacking slideways 34 in a matching manner, the direction of the sliding boxes is along the moving direction of the steel box girder 9, the translation jacks 32 are arranged at two ends of the sliding boxes 33 and can control the sliding boxes 33 to move back and forth, the inner sides of the two sliding boxes 33 are connected through deviation-correcting connecting rods 30, the deviation-correcting jacks 31 are further arranged at two outer ends of the outer sides of the two sliding boxes 33, and the steel box girder 9 can move along an appointed linear shape through adjustment of the deviation-correcting jacks 31; the jacking jack 29 is used for adjusting the upper position and the lower position of the steel box girder in a matching way, and the jacking jack 29 can be placed on the crossbeam A or the crossbeam B or fixed at two ends of the jacking slideway 34 according to requirements.
During the use, steel box girder 9 accomplishes weldment work on welded platform 23, accomplishes the repair of welded steel box girder 9 and scribbles the maintenance work on repair coating maintenance platform 28, and the roof beam body that steel box girder 9 welding formed passes through thrustor and moves forward, specifically is: the translation jack 32 drives the steel box girder 9 to move forwards by moving the sliding box 33, after the movement is finished, the translation jack 32 stops acting, the jacking jack 29 is started to jack the steel box girder 9 upwards, the translation jack 32 retracts to reset the sliding box 33, after the sliding box 33 is reset, the jacking jack 29 retracts to enable the steel box girder 9 to integrally descend to the upper surface of the sliding box 33, the jacking jack 29 is separated from the steel box girder 9 to finish a jacking stroke, and the jacking stroke is repeated until the jacking of the steel box girder 9 is finished.
Claims (8)
1. AThe steel box girder pushing construction structure comprises a LY1-LZ1、LY2-LZ2……LYn-LZnOrganize interim buttress, every group interim buttress includes 2 interim buttress units, its characterized in that:
LY1-LZ1、LY2-LZ2the temporary buttress groups are used for arranging a welding platform and a coating repairing and overhauling platform, and the other temporary buttress groups are used for supporting the pushing device and the steel box girder;
the temporary buttress units comprise a first temporary buttress unit and a second temporary buttress unit, the first temporary buttress unit is arranged on the periphery of the permanent pier, and the second temporary buttress unit is arranged between the permanent piers with the adjacent distance of more than 60-80 m; the top of the first temporary buttress unit and the top of the second temporary buttress unit are respectively and correspondingly provided with a beam A and a beam B, and thrusting devices are arranged on the beam A and the beam B.
2. The steel box girder jacking construction structure according to claim 1, wherein:
the first temporary buttress unit further comprises four steel pipe columns A and transverse connection A, the four steel pipe columns A are enclosed into a cubic shape, the adjacent steel pipe columns A are connected through a plurality of groups of transverse connection A, the top end of each steel pipe column A is provided with 4 spliced I-shaped steel serving as a cross beam A, and the cross beam A is used for supporting the pushing device.
3. The steel box girder jacking construction structure according to claim 1, wherein:
the second temporary buttress unit further comprises four steel pipe columns B and transverse connection B, the four steel pipe columns B are enclosed to form a cube, the adjacent steel pipe columns B are connected through a plurality of groups of transverse connection B, and each two tops of the steel pipe columns B in the direction in which the pushing devices are placed are provided with elongated steel boxes serving as cross beams B.
4. The steel box girder jacking construction structure according to claim 3, wherein:
and a reinforced concrete expansion foundation is arranged at the lower part of the second temporary buttress unit.
5. The steel box girder jacking construction structure according to claim 1,
and the second temporary buttress unit is connected with the first temporary buttress unit closest to the second temporary buttress unit through the lateral connection of the buttress units.
6. The steel box girder jacking construction structure according to claim 1, wherein:
front end road surface and said LY1-LZ1A welding platform is arranged between the temporary buttress groups, a welding platform supporting device is arranged below the welding platform, the welding platform supporting device comprises more than two spans of upright post units A, and each span of upright post unit A comprises at least 4 steel pipe upright posts A; every 2 steel pipe stand A is as a set of welded platform supporting unit, is provided with horizontal contact C between the steel pipe stand A inboard among a set of welded platform supporting unit and connects, and the outside is connected with bracing A, and bracing A's outer end is connected with welded platform.
7. The steel box girder jacking construction structure according to claim 1, wherein:
the LY1-LZ1、LY2-LZ2Be provided with between the interim buttress of group and mend and scribble the maintenance platform, mend and scribble and install below the maintenance platform and mend and scribble maintenance platform strutting arrangement, mend and scribble maintenance platform strutting arrangement including two stand unit B more than striding, every is striden stand unit B and scribble maintenance platform strutting arrangement including 6 at least steel pipe stand B, every 3 steel pipe stand B scribbles maintenance platform strutting arrangement as a set of benefit, a set of benefit is scribbled and is provided with transverse connection D between the steel pipe stand B inboard in the maintenance platform strutting arrangement and connect, the outside is connected with bracing B, bracing B's outer end and mend and scribble maintenance platform and be connected.
8. The steel box girder jacking construction structure according to claim 1, wherein:
the pushing device comprises two sliding boxes, two pushing slideways, two jacking jacks, two translation jacks and two deviation rectifying jacks, the two pushing slideways are symmetrically arranged and placed on the cross beam A or the cross beam B, the sliding boxes can be matched and slide on the pushing slideways, the translation jacks are arranged at the two ends of each sliding box and can control the sliding boxes to move forwards and backwards, the inner sides of the two sliding boxes are connected through deviation rectifying connecting rods, and the two outer ends of each sliding box are respectively provided with the deviation rectifying jacks; and the jacking jack is used for adjusting the upper position and the lower position of the steel box girder in a matching manner.
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| CN202120286463.4U CN215405609U (en) | 2021-02-02 | 2021-02-02 | Steel box girder pushing construction structure |
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| CN202120286463.4U CN215405609U (en) | 2021-02-02 | 2021-02-02 | Steel box girder pushing construction structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775452A (en) * | 2022-04-26 | 2022-07-22 | 济南城建集团有限公司 | Steel box girder split type walking pushing device and construction method thereof |
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2021
- 2021-02-02 CN CN202120286463.4U patent/CN215405609U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775452A (en) * | 2022-04-26 | 2022-07-22 | 济南城建集团有限公司 | Steel box girder split type walking pushing device and construction method thereof |
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