CN118596339A - Precast construction method for concrete box girder - Google Patents
Precast construction method for concrete box girder Download PDFInfo
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- CN118596339A CN118596339A CN202410747753.2A CN202410747753A CN118596339A CN 118596339 A CN118596339 A CN 118596339A CN 202410747753 A CN202410747753 A CN 202410747753A CN 118596339 A CN118596339 A CN 118596339A
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- 239000004567 concrete Substances 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000005498 polishing Methods 0.000 claims abstract description 96
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007790 scraping Methods 0.000 claims description 39
- 238000004804 winding Methods 0.000 claims description 21
- 238000009415 formwork Methods 0.000 claims description 10
- 238000009417 prefabrication Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011178 precast concrete Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The application relates to a precast construction method of a concrete box girder, which relates to the technical field of precast concrete box girders and comprises the following steps: s1, processing and binding a reinforcement cage; s2, spraying a release agent on the surface of the box girder prefabricated template; s3, hoisting the reinforcement cage into the box girder prefabricated template, and installing end dies and inner dies at two ends of the box girder prefabricated template; s4, pouring concrete to the top of the box girder prefabricated template to form a bottom plate, a web plate and a top plate of the box girder preliminarily; s5, automatically vibrating and strickling the top plate, and polishing along the length direction and the width direction of the box girder; s6, after the box Liang Chuning is formed, sprinkling water and curing the surface of the box girder; s7, pre-tensioning the box girder; s8, removing the end die and the inner die, and hoisting the box girder to the outer side of the box girder prefabricated die plate; and S9, curing the inner side and the outer side of the box girder, and finally tensioning. The application has the effects of improving the construction efficiency of constructors on the surface of the box girder top plate, such as trowelling, polishing and the like, and reducing the labor intensity of constructors.
Description
Technical Field
The application relates to the technical field of concrete precast box girders, in particular to a precast construction method of a concrete box girder.
Background
Precast concrete box girders are prefabricated components, commonly used in bridges, tunnels and other engineering projects. Prefabricated box girders typically have a rectangular or box section, which provides a large cross-sectional area, helps to carry the load of bridges or other structures, and contain cavities and holes inside the box girder to reduce dead weight and provide better strength and weight ratio, while also helping to guide cables, pipes, etc. through the box girder.
At present, prefabrication of a box girder generally comprises the work of pouring a bottom plate, a web plate, a top plate, solidification and maintenance work of the box girder, demolding, trimming of edges, polishing and the like in a mold, wherein after the pouring of the top plate is completed, the top plate needs to be subjected to surface collecting work, but the top plate is subjected to surface collecting work by a manual hand-held polishing machine, a scraper and the like, and particularly the top plate of the large box girder is subjected to surface collecting, so that labor intensity is high, efficiency is low, polishing is carried out before initial setting of concrete of the top plate through the polishing machine, and operations such as foot print collecting and the like are required to be carried out by constructors.
Disclosure of Invention
The application provides a precast construction method for a concrete box girder, which aims to improve the construction efficiency of constructors on the surface of a box girder top plate, such as trowelling, polishing and the like, and lighten the labor intensity of constructors.
The application provides a precast construction method of a concrete box girder, which adopts the following technical scheme: the method comprises the following steps:
s1, processing and binding a reinforcement cage;
s2, spraying a release agent on the surface of the box girder prefabricated template;
S3, hoisting the reinforcement cage into the box girder prefabricated templates, installing end molds at two ends of the box girder prefabricated templates and installing an inner mold in the box girder prefabricated templates;
S4, pouring concrete to the top of the box girder prefabricated template to form a bottom plate, a web plate and a top plate of the box girder preliminarily;
S5, automatically vibrating and strickling the top plate, and polishing along the length direction and the width direction of the box girder;
s6, after the box Liang Chuning is formed, sprinkling water and curing the surface of the box girder;
S7, pre-tensioning the box girder, increasing the bending strength of the box girder and reducing cracks;
s8, removing the end die and the inner die, and hoisting the box girder to the outer side of the box girder prefabricated die plate;
And S9, carrying out maintenance operation on the inner side and the outer side of the box girder, and carrying out final tensioning.
By adopting the technical scheme, after the concrete is poured at the top of the precast box girder template to the bottom plate, the web plate and the top plate of the box girder are preliminarily molded, full-automatic surface collecting work is carried out on the top plate of the box girder, a manual hand-held polishing machine, a scraper and the like are not needed to be adopted for surface collecting the top plate, the construction efficiency of surface collecting work such as trowelling, polishing and the like on the top plate of the box girder by constructors is improved, the labor intensity of the constructors is reduced, and meanwhile, the constructors do not need to carry out foot print collecting and the like, so that the operation steps are simplified.
Optionally, in S5, a scraping and polishing mechanism is used to perform a scraping and polishing treatment on the top plate of the box girder, where the scraping and polishing mechanism is disposed on the top of the prefabricated template of the box girder;
The scraping polishing mechanism comprises a support frame, a position adjusting plate, a support plate, a scraping plate, a polishing machine, a rotating assembly, a longitudinal moving assembly, a transverse moving clamping assembly and a spacing adjusting assembly, wherein the support frame is rotationally connected to the top of the precast box girder template, the position adjusting plate is slidingly connected to the support frame along the length direction of the box girder, the support plate is arranged below the position adjusting plate at intervals, the scraping plate is fixedly arranged below the support plate, the polishing machine is arranged on one side of the support plate, the rotating assembly is arranged between the support frame and the precast box girder template and used for driving the support frame to rotate, the longitudinal moving assembly is arranged between the support frame and the position adjusting plate and used for driving the position adjusting plate to move along the length direction of the box girder, the transverse moving clamping assembly is arranged between the support plate and the polishing machine and used for driving the polishing machine to move along the width direction of the box girder and simultaneously clamping and fixing the distance adjusting assembly is arranged between the position adjusting plate and the support plate and the box girder top plate.
By adopting the technical scheme, when the concrete on the top plate of the box girder is scraped and polished through the scraping polishing mechanism, firstly, constructors drive the supporting frame to rotate through the rotating assembly, so that the supporting frame rotates to be parallel to the top of the top plate of the box girder, then the distance between the supporting plate and the top plate of the box girder is adjusted through the distance adjusting assembly, the working surface of the scraping plate and the polishing machine are abutted against the upper surface of the top plate of the box girder, then the scraping plate and the polishing machine are driven to move forwards for a certain distance along the length direction of the box girder through the longitudinal moving assembly, so that the upper surface of the top plate of the box girder is scraped and polished, then the transverse moving clamping assembly drives the polishing machine to move horizontally, so that the polishing machine polishes the upper surface of the top plate of the box girder, then the longitudinal moving assembly continues to drive the scraping plate and the polishing machine to move forwards for a certain distance along the length direction of the box girder, and the process is repeated, and the scraping and polishing process of the top plate of the box girder can be completed; the supporting frame, the scraping plate and the polishing machine adopt an integrated structure, and the supporting frame, the scraping plate and the polishing machine can be driven by the rotating assembly to rapidly rotate to one side of the box girder, so that when a constructor carries out demolding treatment on the box girder, the box girder is not easy to interfere with the supporting frame; the longitudinal movement assembly, the transverse movement clamping assembly and the interval adjusting assembly can be matched with each other to finish the accurate adjustment of the working position of the polishing machine along the length direction behind the width direction of the box girder, so that the quality and efficiency of the top construction of the top plate of the box girder and the accuracy of the total height of the box girder are improved.
Optionally, the rotating assembly includes that fixed cover establishes to support frame rotation axis one end worm wheel, rotates the worm of connecting on the support frame, sets up the gearbox in worm one side to and set up the driving motor between driving motor and gearbox.
Through adopting the technical scheme, when the rotating assembly drives the support frame to rotate, the driving motor drives the worm to rotate through the gearbox, the worm drives the worm wheel to rotate, and the worm wheel can drive the support frame to rotate; the worm wheel and the worm have self-locking property, so that the support frame can be stably fixed to a certain rotation angle for a long time.
Optionally, the longitudinal moving assembly comprises two winding rollers, a band-type brake motor and a plurality of pull ropes, wherein the winding rollers are respectively connected with the support frame in a rotating manner along the two sides of the length direction of the box girder, the band-type brake motor is arranged at one end of each winding roller, and the pull ropes are wound on the winding rollers; one end of the pull rope, which is far away from the winding roller, is fixedly connected with the position adjusting plate.
Through adopting the technical scheme, when the longitudinal moving assembly drives the position adjusting plate to move along the length direction of the box girder, firstly, constructors start the band-type brake motor on one side of the position adjusting plate to operate, and simultaneously start the band-type brake motor on the other side of the position adjusting plate to operate in the same direction, so that one band-type brake motor drives a winding roller to rotate, the winding roller drives a pull rope to wind, the pull rope drives the position adjusting plate to move, and the other band-type brake motor drives the pull rope to synchronously pay off; wherein two wire winding rollers cooperation stay cords can drive the position control board and remove the adjustment position on the one hand, and on the other hand can also make the position control board drive scraper blade and buffing machine and reset fast, and band-type brake motor has certain self-locking nature simultaneously, but the position of locking position control board.
Optionally, the lateral movement clamping assembly comprises a lateral movement screw rod rotationally connected to the supporting plate, a lateral sliding block in threaded connection with the lateral movement screw rod, a clamping component arranged on one side of the lateral sliding block and used for clamping and fixing the polishing machine, and a power motor arranged at one end of the lateral movement screw rod; one side of the transverse sliding block is abutted with the supporting plate.
By adopting the technical scheme, when the polishing machine is driven to move along the width direction of the box girder by the transverse moving clamping assembly, firstly, a constructor starts a power motor, then the power motor drives a transverse moving screw rod to rotate, the transverse moving screw rod drives a transverse sliding block and a clamping component to move, and the clamping component can drive the polishing machine to move along the width direction of the box girder and carry out polishing treatment on the upper surface of a top plate of the box girder; wherein the clamping part can fix the handle of buffing machine on the one hand, makes things convenient for constructor to overhaul, maintain or change work to the buffing machine, and on the other hand can also adjust the position of buffing machine bottom working face from top to bottom, improves the polishing effect of buffing machine.
Optionally, the clamping component comprises two clamping seats symmetrically fixed on one side of the transverse sliding block, a connecting bolt arranged between the two clamping seats, and a connecting nut in threaded connection with the connecting bolt;
the clamping groove is formed in one side, close to each other, of the clamping seat, and the handle of the polishing machine is tightly attached to the inner side wall of the clamping groove.
Through adopting above-mentioned technical scheme, when fixing the buffing machine through the clamping part, at first constructor peg graft the handle of buffing machine to the centre gripping inslot, then make connecting bolt run through two grip brackets and screw up coupling nut, can accomplish the fixed to the buffing machine.
Optionally, the interval adjusting assembly comprises a plurality of adjusting screws connected to the position adjusting plate in a threaded manner, a lifting motor arranged at one end of the adjusting screws, two guide seats respectively arranged at two sides of the lifting motor, and guide blocks fixedly arranged on the shell of the lifting motor;
The guide seat is provided with a guide groove along the height direction, the guide block is positioned in the guide groove and slides up and down, and one end of the adjusting screw is rotationally connected with the supporting plate.
By adopting the technical scheme, when the distance between the supporting plate and the box girder top plate is adjusted through the distance adjusting component to enable the working surfaces of the scraping plate and the polishing machine to be in butt joint with the box girder top plate, firstly, a constructor starts the lifting motor, then the lifting motor drives the adjusting screw to rotate, and the adjusting screw drives the supporting plate to move, so that the working surfaces of the scraping plate and the polishing machine are in butt joint with the box girder top plate; the lifting motor can move along with the lifting of the supporting plate, and meanwhile, the arrangement of the guide block and the guide groove can limit the rotation of the lifting motor, so that the stable power output of the output shaft of the lifting motor is ensured.
Optionally, the scraper is disposed obliquely toward a side near the polishing machine.
Through adopting above-mentioned technical scheme, the scraper blade slope sets up the in-process that makes the scraper blade remove, and the phenomenon that the concrete is difficult for appearing the card dead after piling up in the scraper blade the place ahead.
Optionally, in S5, a traveling vibrating mechanism package is used to vibrate the top plate of the box girder, and the traveling vibrating mechanism is disposed at the top of the prefabricated template of the box girder;
The walking vibrating mechanism comprises two guide rails fixedly arranged above the box girder prefabricated templates along the length direction of the box girder, a moving block connected above the guide rails in a sliding manner, a vibrating frame fixedly arranged between the two moving blocks, a plurality of vibrating motors arranged on the vibrating frame, walking wheels rotatably connected on the moving blocks and a hub motor arranged on one side of the walking wheels.
Through adopting above-mentioned technical scheme, when driving through walking vibrating mechanism and vibrating the processing to the roof of the case roof beam, at first start vibrating motor, wheel hub motor drives the walking wheel and removes along guide rail length direction afterwards, and the walking wheel drives movable block and vibration frame and removes to vibrate the processing to the roof of the case roof beam.
In summary, the present application includes at least one of the following beneficial technical effects:
1. According to the application, after concrete is poured on the top of the box girder prefabricated template to the bottom plate, the web plate and the top plate of the box girder, full-automatic surface collecting work is carried out on the top plate of the box girder, a manual hand-held polishing machine, a scraper and the like are not needed for collecting the top plate, so that the construction efficiency of the surface collecting work such as trowelling, polishing and the like of the top plate of the box girder by constructors is improved, the labor intensity of the constructors is reduced, and meanwhile, the constructors do not need to carry out operations such as foot print collecting and the like, and the operation steps are simplified;
2. The supporting frame, the scraping plate and the polishing machine in the scraping and polishing mechanism are of an integrated structure, and the supporting frame, the scraping plate and the polishing machine can be driven by the rotary assembly to rotate to one side of the box girder rapidly, so that constructors can not interfere with the supporting frame easily when demolding treatment is carried out on the box girder; the longitudinal moving assembly, the transverse moving clamping assembly and the interval adjusting assembly can finish the accurate adjustment of the working position of the polishing machine along the length direction behind the width direction of the box girder, so that the quality, the efficiency and the accuracy of the construction of the top plate of the box girder are improved;
3. The two winding rollers in the longitudinal moving assembly are matched with the pull ropes, so that the position adjusting plate can be driven to move to adjust the position, the position adjusting plate can be used for driving the scraping plate and the polishing machine to reset rapidly, and meanwhile, the band-type brake motor has certain self-locking property and can lock the position of the position adjusting plate;
4. the clamping component in the transversely moving clamping component can fix the handle of the polishing machine on one hand, so that constructors can conveniently overhaul, maintain or replace the polishing machine, and on the other hand, the position of the working surface at the bottom of the polishing machine can be adjusted up and down, and the polishing effect of the polishing machine is improved;
5. The lifting motor in the interval adjusting assembly can move along with the lifting of the supporting plate, and meanwhile, the arrangement of the guide block and the guide groove can limit the rotation of the lifting motor, so that the stable power output of the output shaft of the lifting motor is ensured.
Drawings
FIG. 1 is a schematic structural view of a concrete box girder prefabrication construction method in an embodiment of the present application;
fig. 2 is a schematic diagram showing the structure of the walking vibrating mechanism and the scraping and polishing mechanism;
FIG. 3 is a schematic view showing a partial structure of the scratch-off polishing mechanism;
Fig. 4 is a schematic view showing a partial structure of the walking vibration mechanism;
fig. 5 is a schematic view showing a partially enlarged structure of a portion a in fig. 4.
Reference numerals illustrate: 1. prefabricating a template for the box girder; 2. a walking vibrating mechanism; 21. a guide rail; 22. a moving block; 23. a vibration frame; 24. a vibration motor; 25. a walking wheel; 26. a hub motor; 3. a strickling and polishing mechanism; 31. a support frame; 311. a slideway; 32. a position adjusting plate; 33. a support plate; 34. a scraper; 35. polishing machine; 36. a rotating assembly; 361. a worm wheel; 362. a worm; 363. a gearbox; 364. a driving motor; 37. a longitudinally moving assembly; 371. a wire winding roller; 372. a band-type brake motor; 373. a pull rope; 38. a laterally moving clamping assembly; 381. transversely moving the screw; 382. a power motor; 383. a transverse slide block; 384. a clamping member; 3841. a clamping seat; 3842. a connecting bolt; 39. a spacing adjustment assembly; 391. adjusting a screw; 392. a lifting motor; 393. a guide seat; 3931. a guide groove; 394. and a guide block.
Detailed Description
The present application is described in further detail below with reference to fig. 1-5.
The embodiment of the application discloses a prefabrication construction method of a concrete box girder. Referring to fig. 1, the prefabrication construction method of the concrete box girder includes the steps of:
s1, processing and binding a reinforcement cage;
s2, spraying a release agent on the surface of the box girder prefabricated template 1;
s3, hoisting the reinforcement cage into the box girder prefabricated formwork 1, installing end molds at two ends of the box girder prefabricated formwork 1 and installing an inner mold in the box girder prefabricated formwork 1;
s4, pouring concrete to the top of the box girder prefabricated formwork 1 to form a bottom plate, a web plate and a top plate of the box girder preliminarily;
S5, automatically vibrating and strickling the top plate, and polishing along the length direction and the width direction of the box girder; the box girder top plate is subjected to vibrating treatment by adopting a traveling vibrating mechanism 2 bag, and the traveling vibrating mechanism 2 is also arranged at the top of the box girder prefabricated formwork 1. The scraping and polishing mechanism 3 is adopted to carry out scraping and polishing treatment on the top plate of the box girder, and the scraping and polishing mechanism 3 is arranged at the top of the prefabricated template 1 of the box girder.
S6, after the box Liang Chuning is formed, sprinkling water and curing the surface of the box girder;
S7, pre-tensioning the box girder, increasing the bending strength of the box girder and reducing cracks;
S8, removing the end die and the inner die, and hoisting the box girder to the outer side of the box girder prefabricated template 1;
And S9, carrying out maintenance operation on the inner side and the outer side of the box girder, and carrying out final tensioning.
Referring to fig. 2 and 3, the scraping and polishing mechanism 3 comprises a support frame 31 rotatably connected to the top of the box girder prefabricated formwork 1, a position adjusting plate 32 is slidingly connected to the support frame 31 along the length direction of the box girder, slide ways 311 are respectively and fixedly arranged on two sides of the support frame 31 along the length direction of the box girder, a slide groove is formed in the position adjusting plate 32, and the slide ways 311 are positioned in the slide groove to slide. The backup pad 33 is parallel and the interval is provided with to the position control board 32 below, and backup pad 33 below has set firmly scraper blade 34, and scraper blade 34 inclines to one side towards being close to buffing machine 35 and sets up, and scraper blade 34 inclines to set up and is used for making scraper blade 34 in the in-process that removes, and the difficult phenomenon of blocking of appearing behind scraper blade 34 the place ahead piles up of concrete. A grinder 35 is also provided on one side of the support plate 33.
Referring to fig. 3 and 4, a rotating assembly 36 is disposed between the support frame 31 and the box girder prefabricated formwork 1, and the rotating assembly 36 is used for driving the support frame 31 to rotate. A longitudinal moving component 37 is arranged between the supporting frame 31 and the position adjusting plate 32, and the longitudinal moving component 37 is used for driving the position adjusting plate 32 to move along the length direction of the box girder. A lateral movement clamping assembly 38 is arranged between the support plate 33 and the polishing machine 35, and the lateral movement clamping assembly 38 is used for driving the polishing machine 35 to move along the width direction of the box girder and simultaneously clamping and fixing the polishing machine 35. A spacing adjusting assembly 39 is arranged between the position adjusting plate 32 and the supporting plate 33, and the spacing adjusting assembly 39 is used for adjusting the spacing between the supporting plate 33 and the roof of the box girder.
When the concrete on the top plate of the box girder is scraped and polished through the scraping polishing mechanism 3, firstly, constructors drive the supporting frame 31 to rotate through the rotating component 36, the supporting frame 31 rotates to be parallel to the top of the top plate of the box girder, then the distance between the supporting plate 33 and the top plate of the box girder is adjusted through the distance adjusting component 39, the working surfaces of the scraping plate 34 and the polishing machine 35 are abutted against the upper surface of the top plate of the box girder, then the scraping plate 34 and the polishing machine 35 are simultaneously driven to move forwards for a certain distance along the length direction of the box girder through the longitudinal moving component 37, so that the upper surface of the top plate of the box girder is scraped and polished, then the transverse moving clamping component 38 is started, the polishing machine 35 is driven to move horizontally, so that the polishing machine 35 polishes the upper surface of the top plate of the box girder, then the longitudinal moving component 37 continues to drive the scraping plate 34 and the polishing machine 35 to advance for a certain distance along the length direction of the box girder, and the process is repeated, and the scraping and polishing treatment of the top plate of the box girder can be completed.
Referring to fig. 2 and 3, the rotating assembly 36 includes a worm gear 361 fixedly sleeved to one end of a rotating shaft of the supporting frame 31, a worm 362 rotatably connected to the supporting frame 31, a gear box 363 provided at one side of the worm 362, and a driving motor 364 provided between the driving motor 364 and the gear box 363. When the rotating assembly 36 drives the support frame 31 to rotate, the driving motor 364 drives the worm 362 to rotate through the gear box 363, the worm 362 drives the worm wheel 361 to rotate, and the worm wheel 361 can drive the support frame 31 to rotate.
Referring to fig. 3 and 4, the longitudinal moving assembly 37 includes two winding rollers 371 rotatably connected to both sides of the supporting frame 31 along the length direction of the box girder, and a band-type brake motor 372 is disposed at one end of the winding rollers 371. A plurality of stay cords 373 are wound on the winding roller 371, and one end of the stay cord 373 away from the winding roller 371 is fixedly connected with the position adjusting plate 32.
When the longitudinal moving assembly 37 drives the position adjusting plate 32 to move along the length direction of the box girder, firstly, constructors start the band-type brake motor 372 on one side of the position adjusting plate 32 to operate, and simultaneously start the band-type brake motor 372 on the other side of the position adjusting plate 32 to operate in the same direction, so that one band-type brake motor 372 drives the winding roller 371 to rotate, the winding roller 371 drives the pull rope 373 to wind, the pull rope 373 drives the position adjusting plate 32 to move, the other band-type brake motor 372 drives the pull rope 373 to synchronously pay off, and accordingly the two winding rollers 371 are matched with the pull rope 373 to drive the position adjusting plate 32 to move to adjust the position, and the position adjusting plate 32 can drive the scraping plate 34 and the polishing machine 35 to reset rapidly.
Referring to fig. 4 and 5, the traverse clamp assembly 38 includes a traverse screw 381 rotatably coupled to the support plate 33, and a power motor 382 is provided at one end of the traverse screw 381. The traverse screw 381 is screwed with a traverse slide 383, and one side of the traverse slide 383 is abutted against the support plate 33. A clamping member 384 is provided on one side of the lateral slider 383, and the clamping member 384 is used to clamp and fix the polishing machine 35.
Referring to fig. 4 and 5, the clamping member 384 includes two clamping bases 3841 symmetrically fixed on one side of the transverse slider 383, a clamping groove is formed on one side of the clamping bases 3841, which is close to each other, and a handle of the polishing machine 35 is tightly attached to an inner side wall of the clamping groove. A connecting bolt 3842 is arranged between the two clamping seats 3841, and a connecting nut is connected to the connecting bolt 3842 in a threaded manner.
When the polishing machine 35 is driven to move along the width direction of the box girder by the transversely moving clamping assembly 38, firstly, a constructor starts a power motor 382, then the power motor 382 drives a transversely moving screw 381 to rotate, the transversely moving screw 381 drives a transversely sliding block 383 and a clamping seat 3841 to move, and the clamping seat 3841 can drive the polishing machine 35 to move along the width direction of the box girder and carry out polishing treatment on the upper surface of the top plate of the box girder. When constructor fixes the polishing machine 35 through the clamping component 384, the constructor firstly inserts the handle of the polishing machine 35 into the clamping groove, then makes the connecting bolt 3842 penetrate the two clamping seats 3841 and tightens the connecting nut, and fixing of the polishing machine 35 can be completed.
Referring to fig. 4 and 5, the interval adjusting assembly 39 includes a plurality of adjusting screws 391 screw-coupled to the position adjusting plate 32, the adjusting screws 391 are disposed along the vertical position adjusting plate 32, and one ends of the adjusting screws 391 are rotatably coupled to the support plate 33. The adjusting screw 391 one end is provided with elevator motor 392, and elevator motor 392 both sides are provided with guide holder 393 respectively, have set firmly guide block 394 on the elevator motor 392 shell, and guide slot 3931 has been seted up along its direction of height to guide holder 393, and guide block 394 is located guide slot 3931 and slides from top to bottom, and wherein the rotation of elevator motor 392 can be restricted in the setting of guide block 394 and guide slot 3931, guarantees elevator motor 392 output shaft stable power take off
When the distance between the supporting plate 33 and the top plate of the box girder is adjusted through the distance adjusting assembly 39 to enable the working surfaces of the scraping plate 34 and the polishing machine 35 to be in butt joint with the upper surface of the top plate of the box girder, firstly, a constructor starts the lifting motor 392, then the lifting motor 392 drives the adjusting screw 391 to rotate, and the adjusting screw 391 drives the supporting plate 33 to move, so that the working surfaces of the scraping plate 34 and the polishing machine 35 are in butt joint with the upper surface of the top plate of the box girder.
Referring to fig. 4, the walking vibration mechanism 2 includes two guide rails 21 fixedly arranged above the box girder prefabricated formwork 1 along the length direction of the box girder, and a moving block 22 is slidingly connected above the guide rails 21. A vibration frame 23 is fixedly arranged between the two moving blocks 22, a plurality of vibration motors 24 are arranged on the vibration frame 23, travelling wheels 25 are rotatably connected to the moving blocks 22, and wheel hub motors 26 are arranged on one sides of the travelling wheels 25.
When the box girder top plate is driven to vibrate by the walking vibration mechanism 2, firstly, the vibration motor 24 is started, then the wheel hub motor 26 drives the walking wheel 25 to move along the length direction of the guide rail 21, and the walking wheel 25 drives the moving block 22 and the vibration frame 23 to vibrate the box girder top.
The implementation principle of the precast construction method of the concrete box girder provided by the embodiment of the application is as follows: after the top of the box girder prefabricated formwork 1 is poured to the bottom plate, the web plate and the top plate of the box girder are preliminarily molded, full-automatic surface collecting work is carried out on the top plate of the box girder through the scraping polishing mechanism 3 and the walking vibrating mechanism 2, a manual hand-held polishing machine 35, a scraper and the like are not required to be adopted to collect the top plate, the construction efficiency of surface collecting work such as trowelling and polishing of the top plate of the box girder by constructors is improved, and meanwhile the constructors are not required to carry out foot print collecting and other operations, so that the operation steps are simplified. When the concrete on the top plate of the box girder is scraped and polished through the scraping polishing mechanism 3, firstly, constructors drive the supporting frame 31 to rotate through the rotating assembly 36, the supporting frame 31 is enabled to rotate to be parallel to the top of the top plate of the box girder, then, the distance between the supporting plate 33 and the top plate of the box girder is adjusted through the distance adjusting assembly 39, the working face of the scraper 34 and the working face of the polishing machine 35 are abutted against the upper surface of the top plate of the box girder, then, the scraper 34 and the polishing machine 35 are simultaneously driven to move forwards for a certain distance along the length direction of the box girder through the longitudinal moving assembly 37, the scraping plate 34 and the polishing machine 35 are further driven to carry out the scraping treatment on the upper surface of the top plate of the box girder, then, the transverse moving clamping assembly 38 is started, the polishing machine 35 is driven to move along the horizontal direction, and then, the polishing machine 35 polishes the upper surface of the top plate of the box girder, and the accurate adjustment of the working position of the polishing machine 35 along the length direction after the width direction of the box girder can be completed under the mutual matching effect of the longitudinal moving assembly 37, the transverse moving clamping assembly 38 and the distance adjusting assembly 39.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (9)
1. The prefabrication construction method of the concrete box girder is characterized by comprising the following steps of:
s1, processing and binding a reinforcement cage;
s2, spraying a release agent on the surface of the box girder prefabricated template (1);
S3, hoisting the reinforcement cage into the box girder prefabricated template (1), installing end molds at two ends of the box girder prefabricated template (1) and installing an inner mold in the box girder prefabricated template (1);
s4, pouring concrete to the top of the box girder prefabricated template (1) to form a bottom plate, a web plate and a top plate of the box girder preliminarily;
S5, automatically vibrating and strickling the top plate, and polishing along the length direction and the width direction of the box girder;
s6, after the box Liang Chuning is formed, sprinkling water and curing the surface of the box girder;
S7, pre-tensioning the box girder, increasing the bending strength of the box girder and reducing cracks;
S8, removing the end die and the inner die, and hoisting the box girder to the outer side of the box girder prefabricated template (1);
And S9, carrying out maintenance operation on the inner side and the outer side of the box girder, and carrying out final tensioning.
2. The precast construction method of a concrete box girder according to claim 1, wherein: in S5, a scraping and polishing mechanism (3) is adopted to carry out scraping and polishing treatment on the top plate of the box girder, and the scraping and polishing mechanism (3) is arranged at the top of the prefabricated box girder template (1);
The utility model provides a strickle polishing mechanism (3) is including rotating support frame (31) of connecting at case roof beam prefabricated form (1) top, slide along case roof beam length direction and connect location adjustment board (32) on support frame (31), the interval sets up backup pad (33) of location adjustment board (32) below, set firmly scraper blade (34) of backup pad (33) below, set up buffing machine (35) in backup pad (33) one side, set up be used for driving support frame (31) pivoted rotating assembly (36) between support frame (31) and case roof beam prefabricated form (1), set up be used for driving between support frame (31) and location adjustment board (32) along the longitudinal movement subassembly (37) of case roof beam length direction removal, set up be used for driving buffing machine (35) and carry out centre gripping fixed lateral movement centre gripping subassembly (38) to buffing machine (35) simultaneously along case roof beam width direction removal between backup pad (33), and set up be used for adjusting backup pad (33) apart from interval between case roof plate (39).
3. The precast construction method of a concrete box girder according to claim 2, wherein: the rotating assembly (36) comprises a worm wheel (361) fixedly sleeved at one end of a rotating shaft of the supporting frame (31), a worm (362) rotatably connected to the supporting frame (31), a gearbox (363) arranged on one side of the worm (362), and a driving motor (364) arranged between the driving motor (364) and the gearbox (363).
4. The precast construction method of a concrete box girder according to claim 2, wherein: the longitudinal moving assembly (37) comprises two winding rollers (371) which are respectively connected with the supporting frame (31) in a rotating manner along the two sides of the length direction of the box girder, a band-type brake motor (372) arranged at one end of the winding rollers (371), and a plurality of pull ropes (373) wound on the winding rollers (371); one end of the stay cord (373) far away from the winding roller (371) is fixedly connected with the position adjusting plate (32).
5. The precast construction method of a concrete box girder according to claim 2, wherein: the transverse moving clamping assembly (38) comprises a transverse moving screw (381) rotatably connected to the supporting plate (33), a transverse sliding block (383) in threaded connection with the transverse moving screw (381), a clamping component (384) arranged on one side of the transverse sliding block (383) and used for clamping and fixing the polishing machine (35), and a power motor (382) arranged on one end of the transverse moving screw (381); one side of the transverse slider (383) is abutted against the supporting plate (33).
6. The precast construction method of a concrete box girder according to claim 5, wherein: the clamping component (384) comprises two clamping seats (3841) symmetrically fixed on one side of the transverse sliding block (383), a connecting bolt (3842) arranged between the two clamping seats (3841), and a connecting nut in threaded connection with the connecting bolt (3842);
The clamping groove is formed in one side, close to each other, of the clamping seat (3841), and the handle of the polishing machine (35) is tightly attached to the inner side wall of the clamping groove.
7. The precast construction method of a concrete box girder according to claim 2, wherein: the interval adjusting assembly (39) comprises a plurality of adjusting screws (391) which are connected to the position adjusting plate (32) in a threaded manner, a lifting motor (392) arranged at one end of the adjusting screws (391), two guide seats (393) respectively arranged at two sides of the lifting motor (392), and guide blocks (394) fixedly arranged on the shell of the lifting motor (392);
guide slots (3931) are formed in the guide seats (393) along the height direction, guide blocks (394) are located in the guide slots (3931) and slide up and down, and one end of each adjusting screw (391) is rotationally connected with the supporting plate (33).
8. The precast construction method of a concrete box girder according to claim 2, wherein: the scraper (34) is obliquely arranged towards one side close to the polishing machine (35).
9. The precast construction method of a concrete box girder according to any one of claims 1 to 8, wherein: in S5, vibrating the top plate of the box girder by adopting a walking vibrating mechanism (2), wherein the walking vibrating mechanism (2) is arranged at the top of the prefabricated template (1) of the box girder;
The walking vibrating mechanism (2) comprises two guide rails (21) fixedly arranged above the box girder prefabricated formwork (1) along the length direction of the box girder, a moving block (22) slidingly connected above the guide rails (21), a vibrating frame (23) fixedly arranged between the two moving blocks (22), a plurality of vibrating motors (24) arranged on the vibrating frame (23), walking wheels (25) rotatably connected to the moving blocks (22) and a hub motor (26) arranged on one side of the walking wheels (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410747753.2A CN118596339A (en) | 2024-06-11 | 2024-06-11 | Precast construction method for concrete box girder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410747753.2A CN118596339A (en) | 2024-06-11 | 2024-06-11 | Precast construction method for concrete box girder |
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| Publication Number | Publication Date |
|---|---|
| CN118596339A true CN118596339A (en) | 2024-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410747753.2A Pending CN118596339A (en) | 2024-06-11 | 2024-06-11 | Precast construction method for concrete box girder |
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| Country | Link |
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| CN (1) | CN118596339A (en) |
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