CN216340449U - String beam for pushing stay bar along cable - Google Patents
String beam for pushing stay bar along cable Download PDFInfo
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- CN216340449U CN216340449U CN202122965127.5U CN202122965127U CN216340449U CN 216340449 U CN216340449 U CN 216340449U CN 202122965127 U CN202122965127 U CN 202122965127U CN 216340449 U CN216340449 U CN 216340449U
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- stay
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Abstract
The utility model discloses a string beam for pushing a stay bar along a cable, which comprises an upper string steel beam, a lower string stay and a plurality of stay bars, wherein two ends of the lower string stay are connected with two ends of the upper string steel beam, the stay bars are arranged between the upper string steel beam and the lower string stay and movably connected with the upper string steel beam, the stay bars are connected with the lower string stay through stay bar connecting pieces, a detachable pushing mechanism is arranged between the stay bars and the lower string stay, and the pushing mechanisms are arranged on the same side of the stay bars. In the scheme, the lower end of the stay bar slides to the designated position along the cable only by pushing the stay bar, so that the stay cable is tensioned.
Description
Technical Field
The utility model relates to the field of building construction, in particular to a beam string capable of pushing a stay bar along a cable.
Background
The string beam structure is a large-span prestress self-balancing structure system developed in recent years, generally comprises three parts, namely an upper-string rigid compression steel beam or steel truss, a lower flexible prestress guy cable and a plurality of support rods between the upper-string rigid compression steel beam and the steel truss, and is basically characterized in that the support rods generate upward thrust by tensioning a lower-string high-strength guy cable, so that the upper-string rigid beam generates internal force opposite to that under the action of external load, the deformation of the whole structure is reduced, and the bearing capacity of the structure is improved. The beam string structure system is simple, is stressed clearly, has various structural forms, fully exerts the advantages of rigid and flexible materials, and is increasingly applied to large-span gymnasium engineering.
When a beam string structure is constructed and installed, a large tensioning jack is usually adopted for tensioning a lower string stay cable, the requirement on equipment is high, the tensioning precision is difficult to control, particularly, the stroke of the tensioning jack is large, the equipment is more complex, and therefore a beam string convenient to install is urgently needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects, the utility model provides the beam string with the stay bar pushed along the cable, and the lower end of the stay bar slides to the specified position along the cable only by pushing the stay bar, so that the stay cable is tensioned.
The technical scheme of the utility model is as follows: a string beam for pushing a stay bar along a cable comprises an upper string steel beam and a lower string stay cable, wherein two ends of the lower string stay cable are connected with two ends of the upper string steel beam, a plurality of stay bars are arranged between the upper string steel beam and the lower string stay cable, the stay bars are movably connected with the upper string steel beam, the stay bars are connected with the lower string stay cable through stay cable connecting pieces, detachable pushing mechanisms are arranged between the stay bars and the lower string stay cable, and the pushing mechanisms are arranged on the same side of the stay bars. The pushing mechanism can push the stay bar to rotate to a specified position, and is arranged between the stay bar and the lower chord inhaul cable, so that the installation and the disassembly are convenient.
The pushing mechanism comprises a crawling jack, the crawling jack is connected with the lower portion of the stay bar through a connecting lug plate, the crawling jack is connected with the fastening plate through the connecting lug plate, and the fastening plate is detachably connected with the lower chord inhaul cable. The crawling jack can provide enough jacking force for the support rod, and the support rod and the crawling jack can be movably connected through the connecting lug plate, so that the crawling jack is convenient to push.
The top of the stay bar is provided with the double-lug plate, the bottom of the upper chord steel beam is provided with the connecting plate, the double-lug plate is hinged with the connecting plate, the stay bar can rotate on the plane where the upper chord steel beam and the lower chord stay cable are located, and the double-lug plate is connected with the connecting plate, so that the stay bar is convenient to detach and mount and also convenient to rotate.
The cable connecting piece comprises two cover plates, grooves are formed in the opposite surfaces of the two cover plates, the two grooves form a channel for the lower chord cable to pass through, wedge-shaped blocks used for clamping the lower chord cable are arranged on the two sides of the cover plates, and the wedge-shaped blocks are used for clamping the lower chord cable to prevent the lower chord cable from moving left and right.
The longitudinal section of the cover plates is trapezoidal, and the side length of one side of the two cover plates, which is opposite to the cover plates, is less than the side length of the other side of the two cover plates, which is away from the cover plates; the wedge-shaped block can slide along the inclined planes at the two ends of the cover plate; the wedge-shaped block slides along the inclined plane to clamp the lower chord stay cable.
The wedge block is provided with a vertical rectangular hole groove, the wedge block is fixed on the cover plate through the hole groove by a fixing bolt, the wedge block can slide along the inclined surface of the cover plate, and the fixing bolt plays a role in fixing and prevents the wedge block from falling; the slot can be convenient for wedge to slide from top to bottom.
Set up cable stiff end mark and brace end mark on last the last quarter cable, cable stiff end mark is used for marking last quarter cable and last quarter girder steel fixed position, and brace end mark is used for marking the fixed position of brace and last quarter cable.
According to the scheme, the support rod pushing is realized through the pushing mechanism along the string beam of the cable pushing support rod; compared with the traditional beam string structure, the construction method has the advantages that a tensioning operation platform and a sliding track are not required to be built in the construction process, the time and the cost for building and dismantling the platform are saved, and the construction progress is accelerated. And prestress is applied by pushing the support rod for multiple times, and the prestress is automatically graded. When the stay cable is stretched, construction can be completed only by controlling the hydraulic device to push the stay rod to a vertical state from an inclined state, and the hydraulic device is high in accuracy and small in operation difficulty. The simulation is carried out through finite element analysis software, so that all the support rods are pushed in place at one time, the pretension force of the stay cable can reach a design value, repeated pushing is not needed, and the construction time is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic view of the beam string structure of the present invention.
FIG. 2 is a schematic view of the hinge joint of the upper chord steel beam and the brace rod.
FIG. 3 is a schematic view of the pushing mechanism of the present invention.
FIG. 4 is a schematic drawing showing the labeling of the cable of the present invention.
Fig. 5 is a schematic structural view of a cable connector.
FIG. 6 is a side view of the cable connector.
In the figure, 1 is an upper chord steel beam, 2 is a stay bar, 3 is a lower chord cable, 4 is a connecting plate, 5 is a double lug plate, 6 is a pin shaft, 7 is a connecting lug plate, 8 is a cable connecting piece, 81 is a cover plate, 82 is a connecting bolt, 83 is a wedge-shaped block, 84 is a fixing bolt, 9 is a crawling jack, 10 is a fastening plate, 11 is a cable fixing end mark, and 12 is a stay bar end mark.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The string beam for pushing the stay bars along the cable comprises an upper string steel beam 1, a lower string steel beam 3 and a plurality of stay bars 2, wherein two ends of the lower string steel beam 3 are connected with two ends of the upper string steel beam 1, the stay bars 2 are arranged between the upper string steel beam 1 and the lower string steel beam 3, the stay bars 2 are movably connected with the upper string steel beam 1, the stay bars 2 are connected with the lower string steel beam 3 through stay bar connecting pieces 8, detachable pushing mechanisms are arranged between the stay bars 2 and the lower string steel beam 3, and the pushing mechanisms are all arranged on the same side of the stay bars 2.
The pushing mechanism comprises a crawling jack 9, the crawling jack 9 is connected with the lower portion of the support rod 2 through a connecting lug plate 7, the crawling jack 9 is connected with a fastening plate 10 through the connecting lug plate 7, and the fastening plate 10 is detachably connected with the lower chord inhaul cable 3. The top of vaulting pole 2 sets up binaural board 5, sets up connecting plate 4 in the bottom of last quarter girder steel 1, and binaural board 5 is articulated with connecting plate 4, and vaulting pole 2 can rotate in the plane that last quarter girder steel 1 and last quarter cable 3 are located.
The cable connecting piece 8 comprises two cover plates 81, grooves are formed in the opposite surfaces of the two cover plates 81, the two grooves form a channel for the cable to pass through, wedge-shaped blocks 83 used for clamping the lower chord cable 3 are arranged on the two sides of the cover plates 81, and the two cover plates 81 are connected and fixed through connecting bolts 82. The longitudinal section of the cover plates 81 is trapezoidal, and the side length of one side of each of the two cover plates 81, which is opposite to the side length of the other side of the two cover plates, is smaller than the side length of the other side of the two cover plates, which is opposite to the side length of the other side of the two cover plates; the wedge block 83 can slide along the inclined planes at the two ends of the cover plate. The wedge block 83 is provided with a vertical rectangular hole slot, the fixing bolt 84 fixes the wedge block on the cover plate 81 through the hole slot, and the wedge block 83 can slide along the inclined surface of the cover plate.
Set up cable stiff end mark 11 and brace end mark 12 on last quarter cable 3, cable stiff end mark 11 is used for marking last quarter cable 3 and 1 fixed position of last quarter girder steel, brace end mark 12 is used for marking the fixed position of vaulting pole 2 and last quarter cable 3
During construction, a temporary support frame is erected on site, and an upper chord steel beam 1 is installed on the temporary support frame; a stay bar is arranged at the corresponding position on the upper chord steel beam 1 through a double-lug plate 5 and a connecting plate 4;
according to the construction drawing of the beam string structure and the simulation result of finite element software on the construction process of the beam string structure, calculating the total length of the stay cable and the length between the support rods when the stress of the stay cable reaches the design stress, and calculating the total length of the stay cable and the length between the support rods according to a formula
，
Calculating the original total length of the stay cable and the original length between every two support rods, and marking the stay cable, wherein
Is the original total length of the stay cable,
the length of the stay cable after construction, E is the elastic modulus of the stay cable,
in order to provide the tension for the stay cable,
is the original length of the nth section of the inhaul cable,
in the embodiment, the span of the beam string is 65283mm, the upper beam string is box-shaped, the stay rod is circular tube section with diameter of 600mm and wall thickness of 20mm, the diameter of the stay cable is 60mm, the tensile strength is 1860MPa, and the tension control stress is 520 MPa.
Fixing a lower chord stay cable 3 to two ends of an upper chord steel beam 1, wherein the positions of stay cable fixed end marks 11 on the lower chord stay cable 3 respectively correspond to two end points of the upper chord steel beam 1, a stay bar 2 inclines to one side with a connecting lug plate 7 in the plane of the upper chord steel beam 1, and then fixing the lower end of the stay bar 1 to the lower chord stay cable 3;
the front part of a crawling jack 9 is connected to a connecting lug plate 7 at the lower end of a stay bar 1 through a pin shaft, so that a hydraulic cylinder of the crawling jack 9 is contracted, and the rear part of the crawling jack is fixed to a lower chord inhaul cable 3 through a fastening plate 10;
the connecting bolt 82 of the stay cable connecting piece 8 is screwed, the two wedge-shaped blocks 83 on one side of the lug plate 7 are fixedly connected through the fixing bolt 84, at the moment, the stay rod 2 can only rotate to one side without the lug plate 7, the hydraulic cylinder of the crawling jack 9 is controlled to extend out, and the lower end of the stay rod 2 slides forwards along the lower chord stay cable 3; when the hydraulic cylinder is completely extended out, the bolt of the fastening plate 10 fixed on the lower chord stay cable 3 is loosened, then the hydraulic cylinder is contracted, at this time, the fastening plate 10 moves forwards along the cable, when the hydraulic cylinder is completely retracted, the bolt of the fastening plate is screwed down to fix the fastening plate 10 on the lower chord stay cable 3, the hydraulic cylinder is extended out, and at this time, the support rod is continuously pushed forwards; repeating the above operation, pushing the stay cable connecting piece 8 to the position of the stay rod end mark 12, and fixing the position of the stay rod by fixing the two wedge blocks 83 at the other side of the stay rod 2 through the fixing bolt 84; repeating the step to push the inhaul cable connecting pieces 8 of all the support rods to the corresponding support rod end mark positions 12; the pushing sequence of the support rods is that the support rods are sequentially pushed from the other end of the support rod in the inclined direction.
And rechecking the pulling force of the lower chord stay cable pre-3, finely adjusting the pre-tensioning force of the stay cable by adjusting the position of the stay rod 2 to ensure that the pre-tensioning force of the stay cable reaches the design requirement, and then installing two wedge-shaped blocks on the other side to completely fix the position of the stay rod.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.
Claims (6)
1. The utility model provides a push away beam string roof beam of vaulting pole along cable which characterized in that: comprises an upper chord steel beam (1), a lower chord stay cable (3) and a plurality of support rods (2), wherein two ends of the lower chord stay cable (3) are connected with two ends of the upper chord steel beam (1), a plurality of support rods (2) are arranged between the upper chord steel beam (1) and the lower chord stay cable (3), the support rods (2) are movably connected with the upper chord steel beam (1), the stay bar (2) is connected with the lower chord stay cable (3) through a stay cable connecting piece (8), a detachable pushing mechanism is arranged between the stay bar (2) and the lower chord stay cable (3), and the pushing mechanisms are all arranged on the same side of the stay bar (2), each pushing mechanism comprises a crawling jack (9), each crawling jack (9) is connected with the lower portion of the stay bar (2) through a connecting lug plate (7), each crawling jack (9) is connected with a fastening plate (10) through a connecting lug plate, and each fastening plate (10) is detachably connected with the lower chord stay cable.
2. A beam string for jacking a stay along a cable as claimed in claim 1,
the top of vaulting pole (2) sets up binaural board (5), sets up connecting plate (4) in the bottom of last quarter girder steel (1), and binaural board (5) are articulated with connecting plate (4), and vaulting pole (2) can be in last quarter girder steel (1) and the plane rotation at last quarter cable (3) place.
3. A beam string for jacking a stay along a cable as claimed in claim 1,
the cable connecting piece (8) comprises two cover plates (81), grooves are formed in the opposite faces of the two cover plates (81), the two grooves form a channel for the lower chord cable to pass through, and wedge-shaped blocks (83) used for clamping the lower chord cable are arranged at the two ends of each cover plate (81).
4. A beam string for jacking a stay along a cable according to claim 3,
the longitudinal section of the cover plates (81) is trapezoidal, and the side length of one opposite side of the two cover plates (81) is smaller than the side length of the other opposite side of the two cover plates; the wedge-shaped block (83) can slide along the inclined planes at the two ends of the cover plate (81).
5. A beam string for jacking a stay along a cable as claimed in claim 4,
the wedge block (83) is provided with a vertical rectangular hole groove, the fixing bolt (84) fixes the wedge block (83) to the cover plate (81) through the hole groove, and the wedge block (83) can slide along the inclined surface of the cover plate (81).
6. A beam string for jacking a stay along a cable as claimed in claim 1,
set up cable stiff end mark (11) and strut end mark (12) on last quarter cable (3), cable stiff end mark (11) are used for marking last quarter cable (3) and last quarter girder steel (1) fixed position, and strut end mark (12) are used for marking the fixed position of strut (2) and last quarter cable (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122965127.5U CN216340449U (en) | 2021-11-30 | 2021-11-30 | String beam for pushing stay bar along cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122965127.5U CN216340449U (en) | 2021-11-30 | 2021-11-30 | String beam for pushing stay bar along cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216340449U true CN216340449U (en) | 2022-04-19 |
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ID=81155615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122965127.5U Active CN216340449U (en) | 2021-11-30 | 2021-11-30 | String beam for pushing stay bar along cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216340449U (en) |
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2021
- 2021-11-30 CN CN202122965127.5U patent/CN216340449U/en active Active
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