CN112962981A - Scaffold-free beam column installation method for prefabricated frame structure - Google Patents
Scaffold-free beam column installation method for prefabricated frame structure Download PDFInfo
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- CN112962981A CN112962981A CN202110198102.9A CN202110198102A CN112962981A CN 112962981 A CN112962981 A CN 112962981A CN 202110198102 A CN202110198102 A CN 202110198102A CN 112962981 A CN112962981 A CN 112962981A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
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Abstract
The invention provides a scaffold-free beam column installation method for a prefabricated assembly type frame structure, which comprises the steps of prefabricating and installing prefabricated columns, main beams and secondary beams; during installation, a beam supporting device is connected to the upper end of a prefabricated column which is installed in place, a main beam is placed on a stirrup of a main bracket in the beam supporting device, the main beam is simultaneously positioned in a main beam torsion resisting mechanism, a secondary beam is placed on a stirrup of a secondary bracket of the beam supporting device, and the secondary beam is simultaneously positioned in a secondary beam torsion resisting mechanism; and (3) enclosing the end faces of the main beams, the end faces of the secondary beams and the top surfaces of the prefabricated columns to form a mold cavity by taking the end faces of the main beams, the end faces of the secondary beams and the top surfaces of the prefabricated columns as templates, pouring concrete, and connecting the main beams, the secondary beams and the prefabricated columns into a whole. The invention can combine factory prefabrication, is convenient to operate, is economic and reasonable, and is beneficial to shortening the construction period, controlling the cost and promoting the industrialized development of buildings.
Description
Technical Field
The invention relates to the field of buildings, in particular to a scaffold-free beam column installation method for a prefabricated frame structure.
Background
The prefabricated concrete structure can meet the requirements of housing industrialization and building industrialization, accords with the green and low-carbon concepts, is greatly supported by the government of China in recent years, and has wide development prospect. The prefabricated frame structure is one of the most common structural forms in the prefabricated building, and the prefabricated beam-column connection technology is a key technology of the prefabricated frame structure. The steel pipe fastener bearing frame need be set up usually in the construction of current precast beam column node, treats that beam column node and prefabricated plate construction accomplish just can dismantle after reaching design strength, not only because of the complicated influence time limit for a project of process, still because of renting a large amount of scaffolds for a long time and expending a large amount of manual works and carrying out setting up, demolising of support body, make artifical, material cost improve by a wide margin, be unfavorable for cost control, and have the eminence to fall, risk such as the support body collapses, be unfavorable for safety in production.
Disclosure of Invention
The invention aims to provide a scaffold-free prefabricated assembly type frame structure beam column installation method, which can realize scaffold-free assembly type beam column installation. Therefore, the invention adopts the following technical scheme:
the method for installing the prefabricated frame structure beam column without the scaffold is characterized in that: prefabricating and mounting columns, main beams and secondary beams;
when the prefabricated column is prefabricated, two layers of connecting through holes are prefabricated between first opposite surfaces of the prefabricated column close to the upper end, the number of the connecting through holes of each layer is multiple, and the first opposite surfaces are the side surfaces of the prefabricated column, which are positioned on the same side with the main beam, and the opposite surfaces of the side surfaces of the prefabricated column;
connecting a beam support device at the upper end of the precast column installed in place, the precast beam support device comprising the following structure:
a pair of bottom brackets, a pair of main brackets and a pair of sub brackets;
the pair of bottom brackets are arranged corresponding to the first opposite surface of the prefabricated column, the pair of bottom brackets are provided with a first connecting mechanism to fix the pair of bottom brackets close to the upper end of the prefabricated column, the first connecting mechanism is provided with a connecting screw rod matched with the connecting through hole, and the connecting screw rod penetrates through the connecting through hole and is fastened by a nut to connect the two bottom brackets on the outer side of the first opposite surface;
the pair of main brackets are arranged corresponding to the first opposite surfaces of the prefabricated columns, are arranged on the bottom brackets in a one-to-one correspondence manner and are fixedly connected with the detachable bottom brackets; the main bracket comprises a support steel pipe and a main beam torsion resistance mechanism and is provided with a detachable stirrup;
the pair of secondary brackets are perpendicular to the main bracket and are arranged corresponding to the second opposite surface of the precast column, each secondary bracket comprises a supporting steel pipe and a secondary beam torsion resistant mechanism and is provided with an unloadable stirrup;
the secondary brackets are arranged on the main brackets, the supporting steel pipes of the pair of secondary brackets and the supporting steel pipes of the pair of main brackets are arranged in a groined structure, and the secondary brackets are detachably and fixedly connected with the main brackets;
the main bracket and the bottom bracket are connected through a connecting structure with adjustable positions, and the secondary bracket and the bottom bracket are connected through a connecting structure with adjustable positions, so that the positions of the main bracket and the secondary bracket can be adjusted, and the # -shaped structure becomes a supporting structure which can be sleeved outside a column and can adjust the position and the size;
placing a main beam on a stirrup of the main bracket, wherein the main beam is positioned in a main beam torsion resistance mechanism at the same time, when the main beam is prefabricated, a through horizontal through rod hole is prefabricated between the side surfaces of the main beam close to the end part, a horizontal through rod of the main beam torsion resistance mechanism penetrates through the through rod hole, and the end part of the main beam is placed on the top end surface of a prefabricated column at the same time; placing a secondary beam on a stirrup of the secondary bracket, wherein the secondary beam is simultaneously positioned in a secondary beam torsion resistance mechanism, and the end part of the secondary beam is simultaneously placed on the top end surface of the prefabricated column, so that the beam support without a scaffold is realized;
inserting the outcrop reinforcing steel bars on the end surface of the main beam, the end surface of the secondary beam and the outcrop reinforcing steel bars on the top surface of the prefabricated column together, enclosing the end surface of the main beam, the end surface of the secondary beam and the top surface of the prefabricated column as a template to form a mold cavity, pouring concrete, and connecting the main beam, the secondary beam and the prefabricated column into a whole;
after the concrete reaches the specified strength, the beam supporting device is disassembled, and the disassembling step comprises the following steps:
the stirrups on the primary bracket and the secondary bracket are unloaded first, so that the beam support device is separated from the connection relation between the primary beam and the secondary beam, then the secondary bracket is removed first, then the horizontal penetrating rod of the anti-torsion mechanism of the primary beam is pulled out, the primary bracket is removed, and then the connecting screw rod of the bottom bracket is pulled out to remove the bottom bracket.
On the basis of the technical scheme, the invention can also adopt the following further technical schemes or combine the further technical schemes for use:
the bottom bracket comprises a steel plate clamp with holes and a support frame, wherein the steel plate clamp and the support frame are matched with the first opposite surface of the column, the steel plate clamp with the holes and the support frame are connected in a welded mode, and the holes can be aligned with the connecting through holes in the upper end of the prefabricated column.
The first connecting mechanism comprises a plurality of groups of structures, each group of structures comprises a horizontal penetrating rod, and the horizontal penetrating rod can penetrate through holes in the steel plate clamp with the holes and reserved connecting through holes close to the upper ends of the columns; correspond each end that the pole was worn to the level, steel sheet gasket, spacer, outer steel sheet gasket and nut in setting gradually, the spacer will be interior steel sheet gasket and press on the end bracket, will outer steel sheet gasket pad establish the outside of end bracket presss from both sides tight prefabricated post with the end bracket of both sides through the nut of screwing.
Each layer of the prefabricated column is connected with two through holes, and the diameter of the upper layer of the through holes is smaller than that of the lower layer of the through holes.
The main beam torsion resisting mechanism comprises a U-shaped structure, a horizontal through rod, a torsion resisting gasket and a nut, wherein the width of the U-shaped structure is matched with that of the beam, the horizontal through rod can transversely penetrate through a hole of the horizontal through rod near the end part of the main beam, connecting blocks with holes, which can be adjusted up and down, are arranged at two ends of the U-shaped structure, two ends of the horizontal through rod respectively penetrate through the torsion resisting gasket and the connecting blocks and are locked by the nut, a bolt is connected to the top of the U-shaped structure in a threaded mode, and the bolt is used for pressing the connecting blocks.
The stirrup on the main bracket is welded to the bottom of the U-shaped structure.
The top of the side surface of the bottom bracket is provided with a first angle steel with a connecting hole, the lower parts of the inner side and the outer side of the main bracket supporting steel pipe are provided with a second angle steel, the second angle steel is provided with an adjusting long hole parallel to the length direction of the main bracket supporting steel pipe, and the second angle steel and the first angle steel hole are connected together in a hole-to-hole mode through a bolt assembly by moving the main bracket left and right; the upper portion that the inside and outside both sides of main bracket support steel pipe sets up the third angle steel, the third angle steel is followed main bracket supports steel pipe length direction and sets up a plurality of hole sites that supply to adjust, the lower part that the inside and outside both sides of inferior bracket support steel pipe sets up the fourth angle steel, and the fourth angle steel is followed inferior bracket supports steel pipe length direction and sets up a plurality of hole sites that supply to adjust, links together third angle steel and fourth angle steel hole to the hole through bolt assembly.
The secondary beam anti-twisting structure comprises a bottom steel plate and a U-shaped structure formed by a left channel steel and a right channel steel.
The secondary beam anti-twisting structure is detachably connected with the secondary bracket through two rectangular hoops and comprises a bottom steel plate and a U-shaped structure consisting of a left channel steel and a right channel steel; the two rectangular hoops detachably connect the bottom steel plate and the secondary bracket supporting steel pipe together on the left side and the right side of the bottom steel plate respectively.
The detachable stirrup comprises a beam supporting structure and a stirrup base, wherein the beam supporting structure consists of a rotary body, a bolt, a hexagon nut and a connecting steel structure, wherein the rotary body can rotate relative to an upper structure and a lower structure; adopt the welding seam to connect between body and the bolt, between nut and the connection steel construction of circling round, with the central line between body and the bolt, bolt and nut threaded connection, it is as an organic whole to connect steel construction and stirrup base welding.
Compared with the prior art, the invention has the following advantages:
1. the construction process of the invention is convenient to operate and is beneficial to shortening the construction period. The adopted beam supporting device has light components, is convenient for manual carrying, and is convenient and quick to assemble and disassemble, each component adopts simple bolts and welding joints for connection, the manual operation time of the whole installation and disassembly process is short, and the construction period is greatly shortened.
2. Safe and reliable and exempt from the scaffold. The invention takes the prefabricated production of the component as a production mode, and is characterized by design standardization and component part production, thereby realizing the safety and reliability of the manufacture. The invention avoids the conventional scaffold and steel pipe fastener formwork, can greatly reduce the risk of construction operation, reduce the high-altitude construction workload and ensure that the construction site is clean and spacious. Three pairs of brackets in the beam supporting device are sequentially overlapped, and are connected through bolts to form a stable structural system, so that the load is jointly borne, and the safety performance is sufficiently ensured.
3. The prefabricated building is energy-saving and environment-friendly, and is beneficial to promoting the industrial development of buildings. The prefabricated part can be recycled, and the material cost is saved. The whole industrial chains such as design, production, construction and the like can be integrated, and a novel sustainable development production construction mode with energy conservation, environmental protection and full life cycle value maximization of building products is realized. The prefabricated assembly type process based on the modern technology is beneficial to promoting the application and development of building industrialization in engineering construction.
4. The reproducibility is strong, and the field popularization and application are facilitated. The beam supporting device has higher prefabrication degree, is suitable for temporary support of precast beams with different beam heights and elevations, can be widely applied to engineering, has obvious comprehensive advantages, has stronger reproducibility and is beneficial to vigorous popularization on construction sites in future.
5. Is economical and reasonable, and is beneficial to cost control. Firstly, the unit labor content is greatly reduced, and the labor cost is reduced; secondly, the device can be suitable for temporary support of prefabricated beams with different beam heights and standard heights, and the unit cost of the components is greatly reduced through production of a large number of standardized components; and thirdly, after the working period is saved, other costs such as mechanical material leasing and the like generated by time benefit can be greatly reduced.
Drawings
FIG. 1 is a front view of a beam-column joint connection according to an embodiment of the present invention.
FIG. 2 is a side view of an embodiment of the present invention in a beam-column nodal connection.
Fig. 3 is a perspective view of a beam-column joint connection according to an embodiment of the present invention.
Fig. 4 is an exploded view of the beam support apparatus of the present invention and a precast column.
FIG. 5 is a schematic view of a main bracket according to an embodiment of the present invention.
Fig. 6 is an assembly view of the sub-bracket, the hoop and the sub-beam torsion resisting mechanism according to the embodiment of the invention.
Fig. 7 is an exploded view of the structure of fig. 6.
FIG. 8 is a schematic view of a bottom bracket in an embodiment of the invention.
FIG. 9 is a schematic view of two bottom brackets and a column attached together in an embodiment of the present invention.
FIG. 10 is a schematic view of a main beam torsion mechanism in an embodiment of the present invention.
FIG. 11 is a schematic view of a stirrup in an embodiment of the invention.
FIG. 12 is a schematic view of the stirrup base in an embodiment of the invention.
Detailed Description
The invention provides a scaffold-free beam column installation method for a prefabricated frame structure, which comprises the following steps:
prefabricating and installing the columns 100, the main girders 200 and the secondary girders 300. When the prefabricated column is prefabricated, two layers of connecting through holes 103 are prefabricated between first opposite surfaces 101 of the prefabricated column close to the upper end, wherein the first opposite surfaces are the side surface of the prefabricated column 100 on the same side as the main beam 200 and the opposite surfaces of the side surface; every layer connects through-hole 103 has two, and the diameter of upper strata connection through-hole is less than the diameter of lower floor's connection through-hole, like this, both guarantee with roof beam strutting arrangement's joint strength and guarantee the structural strength of self again, simultaneously when roof beam strutting arrangement's connection operation, it is more convenient. When the main beam 200 is prefabricated, a through horizontal through rod hole is prefabricated between the side surfaces of the main beam close to the end parts.
When in installation, the precast column 300 is firstly installed in place,
at the precast column upper end tie beam strutting arrangement who takes one's place of installation, precast beam strutting arrangement includes a pair of bottom bracket 1, a pair of main bracket 2 and a pair of time bracket 3, and the structural system is firm, and the security performance is high, and the three loops through the bolt fastening, bears the load jointly, reaches the effect that a pair of device can supply precast beam column to connect interim support and removes from and set up the scaffold to easy dismounting, can have enough to meet the need the utilization, the following combines the figure concrete description.
The pair of bottom brackets 1 are disposed corresponding to the first opposite faces 101 of the columns 100, and the first opposite faces 101 are perpendicular to the main beams 200. The bottom bracket 1 comprises a perforated steel plate clamp 11 and a support frame which are matched with a first opposite surface 101 of the column, and the perforated steel plate clamp 11 is connected with the support frame in a welding mode. The support frame comprises two side steel plates 121, a horizontal top supporting steel plate 122, a horizontal lower steel plate 123 and a vertical web plate 124, the two side steel plates and the horizontal top supporting steel plate are welded with the perforated steel plate clamp 11 into a whole, the clamp 11 is welded on the inner side of the support frame, and the outer side of the support frame is open and is used for a fastener to pass through and operating a nut. The holes in the holed steel plate clamp 11 can be aligned with the connecting through holes 103 near the upper end of the prefabricated column, the connecting through holes 103 being perpendicular to the first opposite face 101.
The pair of bottom brackets 1 are provided with a first connecting mechanism to fix the pair of bottom brackets 1 near the upper end of the precast column.
The first connecting mechanism comprises a plurality of groups of structures, each group of structures comprises a horizontal penetrating rod 41, external threads are arranged at two ends of the horizontal penetrating rod 41, the horizontal penetrating rod 41 can penetrate through a hole in the perforated steel plate clamp 11 and a connecting through hole 103 close to the upper end of the prefabricated column, an inner steel plate gasket 42, a spacer 43, an outer steel plate gasket 44 and a locking nut 45 are sequentially arranged at each end corresponding to the horizontal penetrating rod 41, the spacer 43 presses the inner steel plate gasket 42 on the bottom bracket 1 and pads the outer steel plate gasket 44 outside the bottom bracket so as to be convenient for operating the nut 45, the perforated steel plate clamps 11 on two sides are tightly clamped on the prefabricated column 100 through screwing the nut 45 to position the bottom bracket 1, and the horizontal penetrating rod 41 plays a supporting role. The multiple groups of structures of the first connecting mechanism can be divided into an upper layer and a lower layer, the diameter of a horizontal penetrating rod in the upper layer structure is smaller than that of the horizontal penetrating rod in the lower layer, correspondingly, the upper end, close to the prefabricated column 100, of the prefabricated column is provided with the connecting through hole 103 in the corresponding layer, and the aperture of the connecting through hole 103 in the upper layer is smaller than that of the connecting through hole 103 in the lower layer.
The pair of main brackets 2 are arranged corresponding to the first opposite surfaces 101 of the prefabricated columns 100, are arranged on the bottom bracket 1 in a one-to-one correspondence manner, and are fixedly connected with the detachable bottom bracket. The main carriage 2 comprises a support steel tube 21 and a main beam torsion mechanism and is provided with an unloadable stirrup 6; the pair of secondary carriages 3 is perpendicular to the primary carriage 2, arranged in correspondence of a second opposite face 102 of the column, the secondary carriages 3 comprising a supporting steel tube 31 and a secondary beam protection mechanism and being equipped with an unloadable stirrup 6; the secondary bracket 3 is arranged on the main bracket 2, the supporting steel pipes 31 of the pair of secondary brackets and the supporting steel pipes 21 of the pair of main brackets are arranged in a groined structure, and the secondary bracket 3 is detachably and fixedly connected with the main bracket 2.
The support steel pipe 21 that main bracket 2 set up and the support steel pipe 31 that the secondary bracket 3 set up all adopt the rectangle steel pipe, both guaranteed sufficient intensity, are convenient for fold each other again simultaneously and establish, and the setting of the antitorque mechanism of girder, protection mechanism and stirrup of being convenient for.
The main bracket 2 is connected with the bottom bracket 1 through a connecting structure with an adjustable position, the secondary bracket 3 is connected with the main bracket 2 through a connecting structure with an adjustable position, the positions of the main bracket 2 and the secondary bracket 3 can be adjusted, and the # -shaped structure becomes a supporting structure which can adjust the sizes of a 'well wall' position and a 'well mouth' and is sleeved outside the column 100. Specifically, the following structure may be adopted:
the side top welding of bottom bracket 1 takes the first angle steel 13 of connecting hole, the lower part welding second angle steel 22 of the inside and outside both sides of main bracket support steel pipe 21, second angle steel 22 set up with main bracket supports the parallel regulation slot hole 221 of steel pipe 21 length direction, through controlling main bracket 2 about, links together second angle steel 22 and first angle steel 13 pore pair hole through bolt assembly behind the selected position.
The upper portion welding third angle steel 23 of the inside and outside both sides of main bracket support steel pipe 21, third angle steel 23 is followed main bracket supports steel pipe 21 length direction and sets up a plurality of hole sites 231 that supply to adjust, inferior bracket supports the lower part welding fourth angle steel 32 of the inside and outside both sides of steel pipe 31, and fourth angle steel 32 is followed inferior bracket supports steel pipe 31 length direction and sets up a plurality of hole sites 321 that supply to adjust, like this, can adjust the position of inferior bracket 3 in X direction and Y direction, links together third angle steel 23 and fourth angle steel 32 hole pair joggle through bolt assembly after the selected position.
The main beam torsion resisting mechanism in the main bracket comprises a U-shaped structure 24 with the width matched with that of a beam, a horizontal through rod 25, a torsion resisting gasket 26 and a nut 27, wherein the horizontal through rod 25 can cross through a horizontal through rod hole near the end part of the main beam, external threads are arranged at two ends of the horizontal through rod 25, connecting blocks 28 with holes are arranged at two ends of the U-shaped structure and can be adjusted up and down, two ends of the horizontal through rod 25 respectively penetrate through the torsion resisting gasket 26 and the connecting blocks 28 and are locked by the nut 27, and the top of the U-shaped structure is further in threaded connection with a bolt 29 which is used for pressing the connecting blocks 28.
The width of U type structure 24 just satisfies girder 200 and can put into, and the bottom 240 and the main bracket of U type structure 24 support the steel pipe 21 welding, and the bottom of U type structure also can directly utilize the main bracket to support the steel pipe and will constitute two side structures of U type structure 24 and directly weld on the support steel pipe 21 of main bracket, and two kinds of modes all make and can directly set up stirrup 6 in the bottom of U type structure, and it is better to support and antitorque effect. The position of the main beam is fixed through the U-shaped structure 24 and the horizontal through rod 25, and meanwhile, the torsion on the beam is resisted (when the prefabricated plates are placed on the beam in batches, the dead load of the plates is transferred on the beam, and when the plate loads transferred on two sides of the same beam are inconsistent or the prefabricated plates are not connected on one side of the same beam, the beam can be twisted to the side with larger load, so that the torsion bending moment is generated), and the torsion resisting effect is achieved.
The U-shaped structure is formed by welding two side structures and a bottom steel plate (bottom 240), wherein the side structures comprise two side steel plates 241, an inner steel plate 242, a top plate 243 with holes and a hexagon nut 244. The interval between two side steel plates 241, the width of interior steel sheet 242 and the width of connecting block 28 all match with the width that main bracket supported steel pipe 21, form the draw-in groove that can block on main bracket supported steel pipe 21 between the lower part of two side steel plates 241 and the lower extreme of interior steel sheet, firmly welded fastening on main bracket supported steel pipe 21, the connecting block setting is on the steel sheet including, between two side steel plates, the side structure plays limiting displacement to connecting block 28, after horizontal poling bar 25 passed connecting block 28, top screw in bolt 29 compressed tightly the connecting block, guarantee the stability of device.
The secondary beam anti-twist structure comprises a bottom steel plate 51 and a U-shaped structure formed by a left channel steel 52 and a right channel steel 52, the width of the U-shaped structure is matched with that of the secondary beam 300, namely the width between the two channel steels, and the channel steels 52 are tightly attached to or filled in the side faces of the secondary beam.
The secondary beam anti-twisting structure is detachably connected with the support steel pipe 31 arranged on the secondary bracket 3 through two rectangular hoops 53, and the bottom steel plate 51 and the secondary bracket support steel pipe 31 are connected together by the two rectangular hoops 53 on the left side and the right side of the bottom steel plate 51 respectively. The bottom of the secondary beam anti-twisting structure can be directly provided with a stirrup 6, and the position of the stirrup 6 is positioned between the two rectangular hoops.
The rectangular hoop 53 is composed of 4 connecting angle steels 531 and 2 square steel plates 532 to form a hoop main body, wherein 3 connecting angle steels 531 are welded into a U-shaped structure, 2 square steel plates are welded at two ends of the U-shaped structure, the square steel plates 532 of the U-shaped structure are detachably connected with the rest angle steel 531 by using bolt and nut assemblies 533, and an elastic cushion 534 can be arranged on the inner side of the rectangular hoop 53.
The beam supporting structure is composed of a rotary body 61, a hexagon head bolt 62, a hexagon nut 63 and a seamless steel tube 64, wherein the upper structure and the lower structure can rotate relatively. Adopt the welding seam to connect between body 61 and the hexagon head bolt 62, between hexagon nut 63 and the seamless steel pipe 64 revolve, revolve with the central line between body 61 and the hexagon head bolt 62, bolt 62 and nut 63 threaded connection, roof beam bearing structure passes through seamless steel pipe 64 and stirrup base 60 welding are as an organic whole, stirrup base 60 can adopt the steel sheet welding to be the cell type structure and can the muff on the support steel pipe 31 of support steel pipe 21 and the setting of inferior bracket 3 that main bracket 2 set up, can be as an organic whole through welded connection again. The upper structure of the revolving body 61 serves as a beam support surface for bearing the weight of the precast beam. When the stirrup is dismantled, the elevation of a lower structure of the rotary body (rotating together with the bolt 62) is reduced, and the dead weight of the beam borne by the top of the stirrup is removed, so that the beam is reliably supported, and the stirrup can be dismantled easily through unloading.
The base 60 is formed by welding a top steel plate 601 and two side steel plates 602, the distance between the two side steel plates 602 is determined according to the width of the support steel pipe 21 arranged on the main bracket 2 and the width of the support steel pipe 31 arranged on the secondary bracket 3, the bolt rod through hole 603 is arranged below the bolt 62 on the top steel plate 601, and the stroke range of the bolt 62 can be enlarged by matching with the seamless steel pipe 64, so that the application range and the unloading safety of the beam support device are improved. The top surface of the support steel pipe 21 arranged on the main bracket 2 is also provided with a bolt rod through hole 210, so that the universality of the stirrup can be enhanced.
The revolution body 61 can adopt a thrust ball bearing, the lower bearing frame and the upper bearing frame can rotate relatively through a steel ball, the lower bearing frame 612 and the hexagonal head 620 of the bolt 62 are welded into a whole, the upper bearing frame 611 supports the prefabricated beam, the core structure is the thrust ball bearing, the beam dead weight load at the top can be removed through easy rotation, and the structure is greatly convenient to disassemble.
After the beam support device is connected to the precast column 100, placing a main beam 200 on the stirrup of the main bracket, wherein the main beam is simultaneously positioned in the U-shaped structure of a main beam torsion resistance mechanism, a horizontal through rod 25 of the main beam torsion resistance mechanism penetrates through the through rod hole, and the end part of the main beam 200 is simultaneously placed on the top end surface of the precast column 100; placing a secondary beam 300 on the stirrup of the secondary bracket, wherein the secondary beam 300 is simultaneously in a U-shaped structure of a secondary beam torsion resistance mechanism, and the end part of the secondary beam 300 is simultaneously placed on the top end surface of the precast column 200, so that the scaffold-free beam support is realized;
inserting the outcrop reinforcing steel bars on the end surface of the main beam, the end surface of the secondary beam and the outcrop reinforcing steel bars on the top surface of the prefabricated column together, enclosing the end surface of the main beam, the end surface of the secondary beam and the top surface of the prefabricated column as a template to form a mold cavity, pouring concrete, and connecting the main beam, the secondary beam and the prefabricated column into a whole;
after the concrete reaches the specified strength, the beam supporting device is disassembled, and the disassembling step comprises the following steps:
the bolts 62 are operated to easily unload the stirrups 6 on the primary and secondary carriages by means of the swivel 61, so that the beam support is disengaged from the connection with the primary and secondary beams 200, 300, and then the secondary carriage is removed by operating the nuts on the corresponding connection structure, then the horizontal through rod 25 of the anti-torsion mechanism of the primary beam is pulled out, the primary carriage is removed, and then the bottom carriage is removed by pulling out the connecting screw 41 of the bottom carriage.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first," "second," and the like, are also used for brevity of description only and do not indicate or imply relative importance.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The method for installing the prefabricated frame structure beam column without the scaffold is characterized in that: prefabricating and mounting columns, main beams and secondary beams;
when the prefabricated column is prefabricated, two layers of connecting through holes are prefabricated between first opposite surfaces of the prefabricated column close to the upper end, the number of the connecting through holes of each layer is multiple, and the first opposite surfaces are the side surfaces of the prefabricated column, which are positioned on the same side with the main beam, and the opposite surfaces of the side surfaces of the prefabricated column;
connecting a beam support device at the upper end of the precast column installed in place, the precast beam support device comprising the following structure:
a pair of bottom brackets, a pair of main brackets and a pair of sub brackets;
the pair of bottom brackets are arranged corresponding to the first opposite surface of the prefabricated column, the pair of bottom brackets are provided with a first connecting mechanism to fix the pair of bottom brackets close to the upper end of the prefabricated column, the first connecting mechanism is provided with a connecting screw rod matched with the connecting through hole, and the connecting screw rod penetrates through the connecting through hole and is fastened by a nut to connect the two bottom brackets on the outer side of the first opposite surface;
the pair of main brackets are arranged corresponding to the first opposite surfaces of the prefabricated columns, are arranged on the bottom brackets in a one-to-one correspondence manner and are fixedly connected with the detachable bottom brackets; the main bracket comprises a support steel pipe and a main beam torsion resistance mechanism and is provided with a detachable stirrup;
the pair of secondary brackets are perpendicular to the main bracket and are arranged corresponding to the second opposite surface of the precast column, each secondary bracket comprises a supporting steel pipe and a secondary beam torsion resistant mechanism and is provided with an unloadable stirrup;
the secondary brackets are arranged on the main brackets, the supporting steel pipes of the pair of secondary brackets and the supporting steel pipes of the pair of main brackets are arranged in a groined structure, and the secondary brackets are detachably and fixedly connected with the main brackets;
the main bracket and the bottom bracket are connected through a connecting structure with adjustable positions, and the secondary bracket and the main bracket are connected through a connecting structure with adjustable positions, so that the positions of the main bracket and the secondary bracket can be adjusted, and the # -shaped structure becomes a supporting structure which can be sleeved outside a column and can adjust the position and the size;
placing a main beam on a stirrup of the main bracket, wherein the main beam is positioned in a main beam torsion resistance mechanism at the same time, when the main beam is prefabricated, a through horizontal through rod hole is prefabricated between the side surfaces of the main beam close to the end part, a horizontal through rod of the main beam torsion resistance mechanism penetrates through the through rod hole, and the end part of the main beam is placed on the top end surface of a prefabricated column at the same time; placing a secondary beam on a stirrup of the secondary bracket, wherein the secondary beam is simultaneously positioned in a secondary beam torsion resistance mechanism, and the end part of the secondary beam is simultaneously placed on the top end surface of the prefabricated column, so that the beam support without a scaffold is realized;
inserting the outcrop reinforcing steel bars on the end surface of the main beam, the end surface of the secondary beam and the outcrop reinforcing steel bars on the top surface of the prefabricated column together, enclosing the end surface of the main beam, the end surface of the secondary beam and the top surface of the prefabricated column as a template to form a mold cavity, pouring concrete, and connecting the main beam, the secondary beam and the prefabricated column into a whole;
after the concrete reaches the specified strength, the beam supporting device is disassembled, and the disassembling step comprises the following steps:
the stirrups on the primary bracket and the secondary bracket are unloaded first, so that the beam support device is separated from the connection relation between the primary beam and the secondary beam, then the secondary bracket is removed first, then the horizontal penetrating rod of the anti-torsion mechanism of the primary beam is pulled out, the primary bracket is removed, and then the connecting screw rod of the bottom bracket is pulled out to remove the bottom bracket.
2. The scaffolding-free prefabricated assembled frame structure beam column installation method of claim 1, wherein the bottom bracket includes a perforated steel plate jig engaged with the first opposite surface of the column, a support bracket, the perforated steel plate jig and the support bracket being welded together, the holes being alignable with the attachment through holes of the upper end of the prefabricated column.
3. The scaffold-free prefabricated assembled frame structure beam-column installation method of claim 1, wherein the first connecting mechanism comprises a plurality of groups of structures, each group of structures comprises a horizontal through rod, and the horizontal through rod can pass through a hole in a steel plate clamp with a hole and a reserved connecting through hole close to the upper end of the column; correspond each end that the pole was worn to the level, steel sheet gasket, spacer, outer steel sheet gasket and nut in setting gradually, the spacer will be interior steel sheet gasket and press on the end bracket, will outer steel sheet gasket pad establish the outside of end bracket presss from both sides tight prefabricated post with the end bracket of both sides through the nut of screwing.
4. The scaffolding-free prefabricated frame structure beam column installation method of claim 1, wherein the girder torsion mechanism comprises a U-shaped structure with a width matched with the width of the girder, a horizontal through rod capable of passing through a horizontal through rod hole near the end of the girder, a torsion resistant gasket, and a nut, wherein connecting blocks with holes are arranged at two ends of the U-shaped structure, the connecting blocks are adjustable up and down, the torsion resistant gasket and the connecting blocks are respectively passed through at two ends of the horizontal through rod and locked by the nut, and a bolt is screwed on the top of the U-shaped structure and used for pressing the connecting blocks.
5. The scaffolding-free prefabricated assembled frame structure beam column installation method of claim 4, wherein a stirrup on the main bracket is welded to the bottom of the U-shaped structure.
6. The scaffold-free prefabricated assembled frame structure beam column installation method of claim 1, wherein a first angle steel with a connection hole is arranged at the top of the side surface of the bottom bracket, a second angle steel is arranged at the lower part of the inner side and the outer side of the main bracket support steel pipe, the second angle steel is provided with an adjustment long hole parallel to the length direction of the main bracket support steel pipe, and the second angle steel and the first angle steel hole are connected together in a hole-to-hole manner through a bolt assembly by moving the main bracket left and right;
the upper portion that the inside and outside both sides of main bracket support steel pipe sets up the third angle steel, the third angle steel is followed main bracket supports steel pipe length direction and sets up a plurality of hole sites that supply to adjust, the lower part that the inside and outside both sides of inferior bracket support steel pipe sets up the fourth angle steel, and the fourth angle steel is followed inferior bracket supports steel pipe length direction and sets up a plurality of hole sites that supply to adjust, links together third angle steel and fourth angle steel hole to the hole through bolt assembly.
7. The scaffold-free prefabricated assembled frame structure beam-column installation method of claim 1, wherein the secondary beam anti-twist structure comprises a bottom steel plate and a U-shaped structure formed by a left channel steel and a right channel steel.
8. The scaffold-free prefabricated assembled frame structure beam column installation method as claimed in claim 1, wherein the secondary beam anti-twist structure is detachably connected with the secondary bracket through two rectangular hoops, and comprises a bottom steel plate and a U-shaped structure formed by a left channel steel and a right channel steel; the two rectangular hoops detachably connect the bottom steel plate and the secondary bracket supporting steel pipe together on the left side and the right side of the bottom steel plate respectively.
9. The scaffolding-free prefabricated assembled frame structure beam column installation method of claim 1, wherein the unloadable stirrup includes two parts of a beam support structure and a stirrup base, the beam support structure is composed of a rotary body, a bolt, a hexagon nut and a connecting steel structure, wherein the upper structure and the lower structure can relatively rotate; adopt the welding seam to connect between body and the bolt, between nut and the connection steel construction of circling round, with the central line between body and the bolt, bolt and nut threaded connection, it is as an organic whole to connect steel construction and stirrup base welding.
10. The scaffolding-free prefabricated assembled frame structure beam column installation method of claim 1, wherein there are two connection through holes per layer, and the diameter of the upper layer connection through hole is smaller than that of the lower layer connection through hole.
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| CN107034989A (en) * | 2016-12-05 | 2017-08-11 | 浙江省建工集团有限责任公司 | A kind of prefabrication prefabricated components exempt to support installation method |
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