CN111593874A - Supporting system for overweight overhung suspended member of super high-rise residential conversion layer and construction method - Google Patents
Supporting system for overweight overhung suspended member of super high-rise residential conversion layer and construction method Download PDFInfo
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- CN111593874A CN111593874A CN202010226392.9A CN202010226392A CN111593874A CN 111593874 A CN111593874 A CN 111593874A CN 202010226392 A CN202010226392 A CN 202010226392A CN 111593874 A CN111593874 A CN 111593874A
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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
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/006—Scaffold with cantilevered sections, e.g. to accommodate overhangs or recesses in the facade
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/007—Devices and methods for erecting scaffolds, e.g. automatic scaffold erectors
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/16—Struts or stiffening rods, e.g. diagonal rods
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Abstract
The invention discloses an overweight overhung suspended member supporting system of a transfer floor of a super high-rise residence and a construction method thereof. The component load is uniformly transmitted to the overhanging steel platform through the intensive steel pipe fastener type supporting frame, and the steel platform can flexibly design the size according to the actual load, span and overhanging length on site so as to meet the requirement; the invention has the advantages of less used materials, turnover use, no requirement on the bearing capacity of the lower horizontal structure and reduced influence on the construction of surrounding skirt buildings and underground structural areas. The construction process is safe and reliable, green and environment-friendly, has high popularization rate, and is very suitable for the construction task similar to an overweight overhanging suspended component.
Description
Technical Field
The invention relates to a supporting system and a construction method for an overweight overhung suspended component of a transfer floor of a super high-rise residence, and belongs to the technical field of building construction.
Background
With the rapid development of national economy and the progress of design-construction technology, the city construction of China is also rapidly advanced, and various super high-rise and large-scale complex projects continuously innovate the structural style and refresh the building height. The lower part of the super high-rise dwelling house complex with the shear wall supported by the middle frame adopts a frame structure type, and the upper part of the super high-rise dwelling house complex needs to be converted into a shear wall structure at a high position; the conditions that a transfer floor needs an ultra-large and ultra-heavy complex structure and is cantilevered out are often caused by the structural dead weight corresponding to the height of the ultrahigh building and the requirement of the arrangement of the lower building, and the conventional floor type full-hall elevated formwork (the structure has large floor area, complex structure and very high height) cannot meet the requirements of progress, safety and economy of similar project construction tasks.
Disclosure of Invention
The invention aims to provide a superheavy outward-projecting suspended member supporting system and a construction method for a transfer floor of a super high-rise residence, which have the advantages of simple construction process, safety, reliability and high turnover utilization rate, can safely and efficiently ensure the construction task of the transfer floor structure in the space in which the comprehensive project of the super high-rise residence is narrow, and can not influence the construction operation of skirt buildings and large basements. Practice thrift a large amount of manpowers and material input simultaneously, avoid causing the waste that needs carry out the permanent enhancement of large tracts of land to the bearing structure and cause for the construction stage accidental interim load loading, solve the overweight construction difficult problem of choosing unsettled component outward to overcome prior art's not enough.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of a supporting system of an overweight overhanging suspended component of a transfer floor of a super high-rise residence is characterized in that the construction load of the overweight overhanging suspended component of the transfer floor of the super high-rise residence is transmitted to an overhanging steel platform through a balanced bearing system, and the overhanging steel platform bears the construction load of the overweight overhanging suspended component, so that the overweight overhanging suspended component of the transfer floor of the super high-rise residence has no bearing capacity requirement on the structure below the overweight overhanging suspended component, and the influence of the construction on the construction of surrounding skirt buildings and underground structures below the overweight overhanging suspended component is greatly reduced while the problem that the lower part of the suspended component has no reliable structural support in the construction stage is solved.
Preferably, the balanced load-bearing system comprises a dense steel pipe fastener type support frame;
the cantilever steel platform comprises a steel box girder bracket, a Bailey truss and an I-shaped steel distribution beam, the Bailey truss is supported on the steel box girder bracket and fixed with each other, the I-shaped steel distribution beam is laid on the Bailey truss and fixed with each other, and the inner end of the steel box girder bracket is fixed on the reinforced bearing steel pipe column;
the balanced bearing system is laid on the cantilever steel platform and limits the horizontal displacement of the cantilever steel platform through rivets, and the construction load of the overweight cantilever suspended member is uniformly transmitted to the I-shaped steel distribution beam through the dense steel pipe fastener type scaffold, then transmitted to the bailey frame, then transmitted to the steel box beam bracket and finally transmitted to the reinforced bearing steel pipe column.
Preferably, the method comprises the following steps:
step one, determining the specific position of a steel box girder bracket according to an engineering design drawing and on-site actual conditions;
welding reinforced steel ring plates on the inner walls of the reinforced bearing steel pipe columns corresponding to the positions of the steel box girder corbels in advance, wherein the reinforced steel ring plates correspond to the upper flanges and the lower flanges of the steel box girder corbels; meanwhile, arranging an arc triangular support plate with a positioning effect at a position, corresponding to the steel box girder bracket, on the outer wall of the reinforced bearing steel pipe column, hoisting the reinforced bearing steel pipe column to an engineering design position (on an inner support layer structure at the lower layer of the overhanging suspended member), and pouring concrete into the steel pipe column;
the original steel-pipe column structure of strenghthened type bearing steel-pipe column generally adoption structural design itself carries out the side direction rigidity and strengthens, butt joint steel box girder corbel position respectively to the case roof beam top and bottom edges of a wing increase two-layer built-in steel ring board, with reinforcing steel-pipe column side direction rigidity of counterpointing, and correspond steel pipe column section structure roof and bottom plate and all be under construction and accomplish (see steel pipe column and bottom plate among the prior art, the roof construction, inside supporting layer structure is called promptly for the unified of bottom plate and roof in this application, every two inside supporting layer structures all have the steel-pipe column promptly, and inside supporting layer structure about the steel-pipe column is called bottom plate and the roof that corresponds the steel-pipe column respectively, provide reliable lateral.
And step three, hoisting the steel box girder bracket and welding the steel box girder bracket with the reinforced bearing steel pipe column in a full penetration manner, hoisting the steel box girder bracket and welding the reinforced bearing steel pipe column, then filling up the rest arc triangular supporting plates, and enabling the steel box girder bracket to have a reinforced connection effect by adopting the same welding mode, wherein the width of the flange of the steel box girder bracket is required to be more than or equal to 600mm, so that the beret frame can be simply supported on the upper flange of the steel box girder bracket in sections, the length and the weight of the high-altitude hoisting beret frame are reduced, and meanwhile, the projection range of the overweight overhanging suspended component at the upper part is extended out of the overhanging end of the steel box girder bracket, so that the beret frame directly transfers the load downwards in an aligned manner.
Hoisting the bailey frames and fixing the bailey frames on the brackets of the steel box girders through the shaped hoops; the Bailey truss is a common 321 type highway bridge Bailey truss, the span and the number of the trusses are determined according to actual requirements, the Bailey truss is supported on the bracket of the steel box girder according to the hoisting capacity of project hoisting equipment by a simple beam or a continuous beam and is welded and fixed by a shaped hoop.
Laying an I-steel distribution beam, wherein the I-steel distribution beam is simply supported between the internal supporting layer structure and the bailey truss platform and is respectively fixed with the bailey truss and the internal supporting layer structure through a round steel shaping U-shaped clamp and a round steel shaping embedded clamp; if no reliable internal supporting layer structure exists (the unreliable internal supporting layer structure refers to the plane of the poured internal supporting layer structure or the plane of the upper top plate or the bottom plate of the corresponding steel pipe column and the designed Bailey truss 4 are not in the same horizontal plane), the Bailey truss can be directly supported on the Bailey truss platform and the length of the Bailey truss platform is widened;
according to the actual conditions of projects, the I-steel distribution beam can select one end to be supported on the internal supporting layer structure and the other end to be supported on the bailey truss platform, and can also be supported on the bailey truss platform completely (the width of the platform is more than or equal to 1.5m, and the upper component is aligned), preferably, the I-steel distribution beam adopts a mode that one end is supported on the internal supporting layer structure and the other end is supported on the bailey truss platform, the I-steel distribution beam is fixed with the internal supporting layer structure by adopting a shaping embedded card, and is fixed with the bailey truss by adopting a shaping U-shaped card so as to prevent side turning and ensure the fixation reliability, and the overhanging end of the I-steel distribution beam exceeds.
Fixing the upper intensive support scaffold and the upright rods of the outer scaffold on the I-steel distribution beams, and simultaneously erecting the outer scaffold;
the upper flange of the I-shaped steel distribution beam is provided with a steel bar rivet, and the upper intensive steel pipe fastener type support frame and the outer scaffold upright rod are inserted into the steel bar rivet, so that the support body on the platform can be conveniently supported, the horizontal displacement of the support body is limited, the steel pipe is prevented from sliding, and the stability of the support body is ensured; the intensive steel pipe fastener type support frame is mainly made of common steel pipe fastener type scaffolds, the vertical rods are longitudinally and transversely arranged at a spacing of more than 450mm so as to ensure that the upper overweight load is uniformly transmitted to the lower platform, so that the local stress concentration is avoided, and the longitudinal and transverse spacing is the modulus so as to facilitate the alignment adjustment of the vertical rods under the beams.
And seventhly, erecting an intensive support scaffold, laying a template required by the overhanging suspended component, binding reinforcing steel bars, and pouring the overweight overhanging suspended component.
And step eight, sequentially removing the templates required by the overhanging suspended members, removing the intensive support scaffold, removing the external scaffold, removing the distribution beam, sliding the bailey frame to the removal platform, removing the bailey frame and removing the bracket of the steel box beam.
According to the required overweight unsettled component braced system that chooses outward of superelevation layer house conversion layer of above-mentioned construction method, including being located and choosing the unsettled component below strenghthened type bearing steel pipe post outward and the conversion layer and choosing the inside supporting layer structure of unsettled component inner structure projection below outward, its characterized in that: the steel platform of encorbelmenting is fixed to be set up in strenghthened type bearing steel-pipe column one side, lay the balanced bearing system that constitutes by intensive shaped steel pipe fastener formula support frame and restrict its horizontal displacement on the steel platform of encorbelmenting, set up outer scaffold frame and fix each other on the steel platform of encorbelmenting in the balanced bearing system outside, intensive shaped steel pipe fastener formula support frame is parallel to each other with outer scaffold frame, this balanced bearing system is located and encorbelments unsettled under the component outward, this balanced bearing system is used for supporting the unsettled component of encorbelmenting of construction stage.
Preferably, a reinforced steel ring plate is fixedly arranged on the inner wall of the reinforced bearing steel pipe column at the joint of the reinforced bearing steel pipe column and the cantilever steel platform, and the reinforced bearing steel pipe column is filled with concrete; grout holes are uniformly distributed around the reinforced steel ring plate, and the middle part of the reinforced steel ring plate is hollow to form grouting holes.
Preferably, the cantilever steel platform comprises a steel box girder bracket, a bailey truss and an I-steel distribution beam, wherein the bailey truss is fixed on the steel box girder bracket, and the I-steel distribution beam is fixed on the bailey truss; and an auxiliary arc triangular supporting plate is arranged at the joint of the steel box girder bracket and the reinforced bearing steel pipe column in the cantilever steel platform and used for improving the connection strength.
Preferably, the steel box girder bracket adopts a rectangular box girder section, a sliding and disassembling platform is additionally arranged at the overhanging end, the upper flange of the sliding and disassembling platform is consistent with the upper flange of the steel box girder bracket, webs at two sides are cut into triangles without lower flanges, and the sliding and disassembling platform can be integrally processed with the steel box girder bracket or connected with the bracket in a welding mode; load should not be applied to it in the overhanging suspended member construction stage, the bailey truss of only being convenient for when dismantling the bailey truss outwards release to be convenient for hoisting machinery dismantles the bailey truss.
Preferably, the shaped hoops are uniformly arranged between the bottom of the bailey truss and the brackets of the steel box girder; the shaped hoop is of a [ -structure, spans the support rod at the bottom of the bailey frame, is fixedly welded on the steel box girder bracket at two ends, and is parallel to the steel box girder bracket;
preferably, the fixing mode of the upper part of the bailey truss and the I-steel distribution beam is that the I-steel distribution beam is completely supported on the bailey truss platform, or one end of the I-steel distribution beam is supported on the internal supporting layer structure, and the other end of the I-steel distribution beam is supported on the bailey truss platform; the I-steel distribution beams are all supported on the bailey truss platform, namely a shaped U-shaped clamp is arranged between the upper part of the bailey truss and the I-steel distribution beams, a connecting plate with a connecting hole is fixedly arranged at a gap between the I-steel distribution beams, the shaped U-shaped clamp is reversely buckled to fix a top supporting piece of the bailey truss in the shaped U-shaped clamp, two legs of the shaped U-shaped clamp extend out of the gap between the I-steel distribution beams and are matched with the connecting plate with the connecting hole at the same time, and the I-steel distribution beams are connected and fixed with the bailey truss through bolts and matched and screwed up with the legs of the shaped U-shaped clamp, so that the I-steel distribution beams are all supported on the bailey truss; i-steel distribution beam one end supports in inside supporting layer structure, and the other end supports on bailey truss platform and indicates: the fixing device comprises an internal supporting layer structure, a fixing embedded card is embedded in the internal supporting layer structure, the inner end of an I-steel distribution beam is embedded in the fixing embedded card and fixed through a bolt, a fixing U-shaped card is arranged between the other side of the I-steel distribution beam and the upper portion of a bailey bracket, a connecting plate with a connecting hole is fixedly arranged at a gap between the I-steel distribution beam, the fixing U-shaped card is reversely buckled to fix a top supporting piece of the bailey bracket in the fixing U-shaped card, two legs of the fixing U-shaped card extend out of a gap between the I-steel distribution beams and are matched with the connecting plate with the connecting hole, and the fixing U-shaped card is screwed with the legs of the fixing U-shaped card through bolts in a matched mode, so that one.
Preferably, the wing plate evenly arranges steel rivets on the I-steel distribution beam, and the pole setting of intensive steel pipe fastener formula support frame and outer scaffold frame is inserted in the steel rivets to the support body of convenient intensive steel pipe fastener formula support frame and outer scaffold frame is propped up and is established, prevents to slide simultaneously, ensures that intensive steel pipe fastener formula support frame and outer scaffold frame are stable. Compared with the prior common high formwork supporting technology, the supporting device has the advantages that the number of turnover materials used for supporting is greatly reduced, a force transmission system is safe and reliable, and the influence on the construction of surrounding undaria and underground structural areas is reduced. Meanwhile, the invention has no bearing capacity requirement on the lower horizontal structure, and avoids the waste caused by the permanent reinforcement of the supporting layer structure due to the disposable overweight accidental load formed in the construction stage. In addition, the customized/existing materials adopted by the invention are all recyclable materials, are green and environment-friendly, have safe and reliable construction process and high popularization rate, and are very suitable for construction tasks similar to overweight overhanging suspended members.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the drawing;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of the connection between a reinforced bearing steel pipe column and a steel box girder bracket according to the present invention;
FIG. 5 is a schematic view of the connection of a steel box girder bracket, a Bailey truss and an I-steel distribution girder according to the present invention;
FIG. 6 is a schematic view of the connection between an I-beam distribution beam and a dense steel pipe fastener type support frame and an external scaffold.
1-reinforced bearing steel pipe column, 2-built-in steel ring plate, 3-steel box beam bracket, 4-bailey bracket, 5-I-steel distribution beam, 6-dense steel pipe fastener type support frame, 7-external scaffold, 8-overweight external overhanging suspended member, 9-triangular support plate, 10-shaped clamp, 11-shaped U-shaped clamp, 12-shaped embedded clamp, 13-steel bar rivet, 14-grout outlet, 15-grout injection hole, 16-connecting plate with connecting hole, 17-internal support layer structure and 18-sliding disassembly platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
a construction method of a superelevation residential conversion layer overweight overhanging suspended component supporting system is characterized in that construction load of the superelevation residential conversion layer overweight overhanging suspended component is transmitted to an overhanging steel platform through a balanced bearing system, and the overhanging steel platform bears the construction load, so that the superelevation residential conversion layer overweight overhanging suspended component has no bearing capacity requirement on a structure below the superelevation residential conversion layer overweight overhanging suspended component, and influence of construction on surrounding undaria buildings and underground structure construction below the suspended component is greatly reduced while the problem that the suspended component has no reliable structural support below the suspended component in a construction stage is solved.
Preferably, the balanced load-bearing system comprises a dense steel pipe fastener type support frame 6;
the cantilever steel platform comprises a steel box girder bracket 3, a bailey truss 4 and an I-steel distribution beam 5, wherein the bailey truss 4 is supported on the steel box girder bracket 3 and fixed with each other, the I-steel distribution beam 5 is laid on the bailey truss 4 and fixed with each other, and the inner end of the steel box girder bracket 3 is fixed on the reinforced bearing steel pipe column 1;
the balanced bearing system is laid on the overhanging steel platform and fixed with each other, the horizontal displacement of the balanced bearing system is limited by rivets, the construction load of the overweight overhanging suspended component 8 is uniformly transmitted to the I-shaped steel distribution beam 5 through the dense steel pipe fastener type scaffold 6, then transmitted to the Bailey truss 4, then transmitted to the steel box girder bracket 3 and finally transmitted to the reinforced bearing steel pipe column 1.
Preferably, the construction method comprises the following steps:
step one, determining the specific position of a steel box girder bracket 3 according to an engineering design drawing and on-site actual conditions;
welding a reinforced steel ring plate 2 on the inner wall of a reinforced bearing steel pipe column 1 corresponding to the position of a steel box girder bracket 3 in advance, wherein the reinforced steel ring plate 2 corresponds to the upper flange and the lower flange of the steel box girder bracket 3; meanwhile, arranging an arc triangular support plate 9 with a positioning effect at a position, corresponding to the steel box girder bracket 3, on the outer wall of the reinforced bearing steel pipe column 1, hoisting the reinforced bearing steel pipe column 1 to an internal support layer structure 17, of which the engineering design position is positioned at the lower layer of the overhanging suspended member, and pouring concrete into the steel pipe column;
the original steel-pipe column structure of strenghthened type bearing steel-pipe column generally adoption structural design itself carries out the side direction rigidity and strengthens, butt joint steel box girder corbel position respectively to the case roof beam upper and lower edge of a wing increase two-layer built-in steel ring board, with reinforcing steel-pipe column side direction rigidity of counterpointing, and correspond steel pipe column section structure roof and bottom plate and all have been under construction and accomplish (see steel pipe column and bottom plate among the prior art, the roof construction, inside supporting layer structure 17 is called promptly for the unified of bottom plate and roof in this application, every two inside supporting layer structures 17 all have the steel-pipe column promptly, and inside supporting layer structure 17 about the steel-pipe column is called bottom plate and the roof that corresponds the steel-pipe column respectively), provide reliable.
And step three, hoisting the steel box girder bracket 3 and welding the steel box girder bracket 3 with the reinforced bearing steel pipe column 1 in a full penetration manner, hoisting the steel box girder bracket 3 and welding the reinforced bearing steel pipe column 1, then filling up the rest arc triangular supporting plates 9, and enabling the steel box girder bracket to have a reinforced connection effect by adopting the same welding mode, wherein the flange width of the steel box girder bracket is required to be more than or equal to 600mm, so that the bailey truss can be simply supported on the upper flange of the steel box girder bracket in sections, the length and the weight of a bailey truss hoisted in high altitude are reduced, and meanwhile, the overhanging end of the steel box girder bracket is extended out of the projection range of an overweight overhanging component at the upper part, so that the bailey truss directly transfers the load to the lower position.
Hoisting the bailey frames 4 and fixing the bailey frames on the steel box girder brackets 3 through the shaped hoops 10; the Bailey truss is a common 321 type highway bridge Bailey truss, the span and the number of the trusses are determined according to actual requirements, the Bailey truss is supported on the bracket of the steel box girder according to the hoisting capacity of project hoisting equipment by a simple beam or a continuous beam and is welded and fixed by a shaped hoop.
Laying an I-steel distribution beam 5, wherein the I-steel distribution beam 5 is simply supported between the internal supporting layer structure 17 and the bailey truss 4 platform, and is respectively fixed with the bailey truss 4 and the internal supporting layer structure 17 through a round steel shaping U-shaped card 11 and a round steel shaping embedded card 12; if no reliable internal supporting layer structure 17 exists (the unreliable internal supporting layer structure 17 means that the plane of the poured internal supporting layer structure 17 (or a top plate or a bottom plate on a corresponding steel pipe column) is not in the same horizontal plane with the designed Bailey truss 4), the Bailey truss 4 platform can be directly supported on the Bailey truss 4 platform and the length of the Bailey truss 4 platform is widened;
according to the actual conditions of projects, the I-steel distribution beam can select one end to be supported on the internal supporting layer structure and the other end to be supported on the bailey truss platform, and can also be supported on the bailey truss platform completely (the width of the platform is more than or equal to 1.5m, and the upper component is aligned), preferably, the I-steel distribution beam adopts a mode that one end is supported on the internal supporting layer structure and the other end is supported on the bailey truss platform, the I-steel distribution beam is fixed with the internal supporting layer structure by adopting a shaping embedded card, and is fixed with the bailey truss by adopting a shaping U-shaped card so as to prevent side turning and ensure the fixation reliability, and the overhanging end of the I-steel distribution beam exceeds.
Sixthly, fixing upright rods of the upper intensive supporting scaffold 6 and the outer scaffold 7 on the I-steel distribution beam 5, and simultaneously erecting the outer scaffold 7;
the upper flange of the I-shaped steel distribution beam is provided with a steel bar rivet, and the upper intensive steel pipe fastener type support frame and the outer scaffold upright rod are inserted into the steel bar rivet, so that the support body on the platform can be conveniently supported, the steel pipes can be prevented from sliding, and the stability of the support body can be ensured; the intensive steel pipe fastener type support frame is mainly made of common steel pipe fastener type scaffolds, the vertical rods are longitudinally and transversely arranged at a spacing of more than 450mm so as to ensure that the upper overweight load is uniformly transmitted to the lower platform, so that the local stress concentration is avoided, and the longitudinal and transverse spacing is the modulus so as to facilitate the alignment adjustment of the vertical rods under the beams.
And seventhly, erecting an intensive support scaffold, laying a template required by the overhanging suspended component, binding reinforcing steel bars, and pouring the overweight overhanging suspended component.
And step eight, sequentially removing the templates required by the cantilever suspended members, removing the intensive support scaffold, removing the external scaffold, removing the distribution beam, removing the bailey frame and removing the steel box girder bracket.
According to the overweight unsettled component braced system that chooses outward of a high-rise residential conversion layer that above-mentioned construction method is required, an overweight unsettled component braced system that chooses outward of high-rise residential conversion layer, including being located and choosing the unsettled component 8 below strenghthened type bearing steel-pipe column 1 outward and the conversion layer and choosing the unsettled component 8 inner structure projecting inside supporting layer structure 17 below, its characterized in that: the steel platform of encorbelmenting is fixed to be set up in 1 one side of strenghthened type bearing steel-pipe column, lay the balanced bearing system that constitutes by intensive steel pipe fastener formula support frame 6 and restrict its horizontal displacement on the steel platform of encorbelmenting, set up outer scaffold frame 7 and fix each other on the steel platform of encorbelmenting in the balanced bearing system outside, intensive steel pipe fastener formula support frame 6 is parallel to each other with outer scaffold frame 7, this balanced bearing system is located and encorbelments suspended component under, this balanced bearing system is used for supporting the suspended component of encorbelmenting outward in the construction stage.
Preferably, a reinforced steel ring plate 2 is fixedly arranged on the inner wall of a reinforced bearing steel pipe column 1 at the joint of the reinforced bearing steel pipe column and the cantilever steel platform, and the reinforced bearing steel pipe column 1 is filled with concrete; grout outlet holes 14 are uniformly distributed around the reinforced steel ring plate 2, and the middle part of the reinforced steel ring plate 2 is hollow to form grouting holes 15.
Preferably, the cantilever steel platform comprises a steel box girder bracket 3, a bailey truss 4 and an I-steel distribution beam 5, wherein the bailey truss 4 is fixed on the steel box girder bracket 3, and the I-steel distribution beam 5 is fixed on the bailey truss 4; subsidiary arc triangular supporting plates 9 are arranged at the joints of the steel box girder corbels 3 and the reinforced bearing steel pipe columns in the overhanging steel platform and used for improving the connection strength.
Preferably, the steel box girder bracket 3 adopts a rectangular box girder section, a sliding and dismounting platform 18 is additionally arranged at the overhanging end, the upper flange of the sliding and dismounting platform 18 is consistent with the upper flange of the steel box girder bracket 3, webs at two sides are cut into triangles without lower flanges, and the sliding and dismounting platform 18 can be integrally processed with the steel box girder bracket 3 or can be connected with the bracket in a welding mode; load should not be applied to the overhanging suspended member 8 in the construction stage, and the bailey truss 4 is convenient to be pushed out only when the bailey truss 4 is disassembled, so that the bailey truss 4 is convenient to be disassembled by hoisting machinery.
Preferably, the shaped hoops 10 are uniformly arranged between the bottom of the bailey truss 4 and the steel box girder bracket 3; the shaped hoop 10 is of a [ -structure, the shaped hoop 10 stretches across a support rod at the bottom of the bailey truss 4, two ends of the shaped hoop 10 are fixedly welded on the steel box girder bracket 3, and the shaped hoop 10 is parallel to the steel box girder bracket 3; reinforcing steel bar rivets 13 are uniformly arranged on wing plates on the I-shaped steel distribution beam 5, and the vertical rods of the intensive steel pipe fastener type support frame 6 and the outer scaffold 7 are inserted into the reinforcing steel bar rivets 13 so as to be convenient for supporting the frame bodies of the intensive steel pipe fastener type support frame 6 and the outer scaffold 7, and meanwhile, the support frames are prevented from sliding, so that the stability of the intensive steel pipe fastener type support frame 6 and the outer scaffold 7 is ensured.
Preferably, the fixing mode of the upper part of the bailey truss 4 and the i-steel distribution beam 5 is that the i-steel distribution beam 5 is completely supported on the bailey truss platform 4, or one end of the i-steel distribution beam 5 is supported on the internal supporting layer structure 17, and the other end is supported on the bailey truss platform 4; the I-steel distribution beams 5 are all supported on the bailey truss platform 4, namely a shaped U-shaped clamp 12 is arranged between the upper part of the bailey truss 4 and the I-steel distribution beams 5, a connecting plate 16 with a connecting hole is fixedly arranged at a gap between the I-steel distribution beams 5, the shaped U-shaped clamp 12 is reversely buckled to fix a support piece at the top of the bailey truss 4 in the shaped U-shaped clamp 12, two legs of the shaped U-shaped clamp 12 extend out of the gap between the I-steel distribution beams 5 and are matched with the connecting plate 16 with the connecting hole at the same time, and the I-steel distribution beams 5 are connected and fixed with the bailey truss 4 to realize that the I-steel distribution beams 5 are all supported on the bailey truss platform 4 by matching and screwing bolts with the legs of the shaped U-shaped clamp; the I-steel distribution beam 5 with one end supported on the internal supporting layer structure 17 and the other end supported on the bailey truss platform 4 means that: the method comprises the steps that a forming embedded card 12 is embedded in an inner supporting layer structure 17, the inner end of an I-steel distribution beam 5 is embedded into the forming embedded card 12 and fixed through bolts, a forming U-shaped card 12 is arranged between the other side of the I-steel distribution beam 5 and the upper portion of a bailey bracket 4, a connecting plate 16 with a connecting hole is fixedly arranged at a gap between the I-steel distribution beam 5, a top supporting piece of the bailey bracket 4 is fixed in the forming U-shaped card 12 through the reverse buckle of the forming U-shaped card 12, two supporting legs of the forming U-shaped card 12 extend out of a gap between the I-steel distribution beam 5 and are matched with the connecting plate 16 with the connecting hole, and the I-steel distribution beam 5 is tightly screwed with the supporting legs of the forming U-shaped card 12 through the matching of the bolts, so that one end
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A construction method of an overweight overhanging suspended component supporting system of a super high-rise residential conversion layer is characterized by comprising the following steps: the method is characterized in that the construction load of the overweight overhanging suspended component of the transfer floor of the super high-rise residence is transmitted to the overhanging steel platform through the balanced bearing system, and the overhanging steel platform bears the construction load, so that the overweight overhanging suspended component of the transfer floor of the super high-rise residence has no bearing capacity requirement on the structure below the overweight overhanging suspended component, and the influence of the construction on the construction of surrounding skirt buildings and underground structures below the overweight overhanging suspended component is greatly reduced while the problem that the suspended component has no reliable structural support below the construction stage is solved.
2. The method of constructing a super heavy overhanging suspended member support system for a super high-rise residential conversion floor as claimed in claim 1, wherein:
the balanced bearing system comprises an intensive steel pipe fastener type support frame (6);
the cantilever steel platform comprises a steel box girder bracket (3), a bailey truss (4) and an I-steel distribution beam (5), the bailey truss (4) is supported on the steel box girder bracket (3) and fixed with each other, the I-steel distribution beam (5) is laid on the bailey truss (4) and fixed with each other, and the inner end of the steel box girder bracket (3) is fixed on the reinforced bearing steel pipe column (1);
the balanced bearing system is laid on the cantilever steel platform and horizontally limited, the construction load of the overweight cantilever suspended member (8) is uniformly transmitted to the I-shaped steel distribution beam (5) through the dense steel pipe fastener type scaffold (6), then transmitted to the Bailey frame (4), then transmitted to the steel box girder bracket (3), and finally transmitted to the reinforced bearing steel pipe column (1).
3. The method of constructing a super heavy overhanging suspended member support system for a super high residential conversion floor as claimed in claim 2, comprising the steps of:
step one, determining the specific position of a steel box girder bracket (3) according to an engineering design drawing and on-site practice;
step two, strengthening the originally designed steel pipe column in the internal supporting structure (17) below the conversion layer into a reinforced bearing steel pipe column (1), welding a reinforcing ring plate (2) to the position of the contraposition steel corbel in the reinforced bearing steel pipe column (1), and pouring concrete into the steel pipe column;
hoisting a steel box girder bracket (3) and fully penetration welding the steel box girder bracket with the reinforced bearing steel pipe column (1);
hoisting the bailey frames (4) and fixing the bailey frames on the steel box girder brackets (3) through the shaped hoops (10);
laying an I-steel distribution beam (5), wherein the I-steel distribution beam (5) is simply supported between the internal supporting layer structure (17) and the bailey truss (4) platform, and is respectively fixed with the bailey truss (4) and the internal supporting layer structure (17) through a round steel forming U-shaped card (11) and a round steel forming embedded card (12); if no reliable internal supporting layer structure (17) exists, the platform can be directly supported on the bailey truss (4) and the length of the bailey truss (4) is widened;
sixthly, upright rods of upper intensive support scaffolds (6) and outer scaffolds (7) are fixed on the I-steel distribution beam (5), and the outer scaffolds (7) are erected at the same time;
step seven, erecting an intensive support scaffold, laying a template required by the overhanging suspended component, binding reinforcing steel bars, and pouring the overweight overhanging suspended component;
and step eight, sequentially removing the templates required by the cantilever suspended members, removing the intensive support scaffold, removing the external scaffold, removing the distribution beam, removing the bailey frame and removing the steel box girder bracket.
4. The method of claim 3, wherein the system comprises: in the second step and the third step, a reinforced steel ring plate (2) is welded on the inner wall of the reinforced bearing steel pipe column (1) corresponding to the position of the steel box girder bracket (3) in advance, and the reinforced steel ring plate (2) corresponds to the upper flange and the lower flange of the steel box girder bracket (3); simultaneously, the arc triangular support plates (9) with the positioning function are arranged at the positions, corresponding to the steel box girder brackets (3), of the outer walls of the reinforced bearing steel pipe columns (1), then the steel box girder brackets (3) are hoisted and welded on the reinforced bearing steel pipe columns (1), then the residual arc triangular support plates (9) are filled up, and the reinforced connection function is achieved by the aid of the same welding mode.
5. The method of claim 3, wherein the system comprises: in the fourth step, the bailey frames (4) are supported on the steel box girder brackets (3) in a simple beam or continuous beam mode and are welded and fixed on the steel box girder brackets by adopting the shaped hoops (10).
6. The overweight overhanging suspended member supporting system of the transfer floor of the super high-rise residential building, which is required by the construction method according to any one of the claims 1 to 5, comprises a reinforced bearing steel pipe column (1) positioned below an overhanging suspended member (8), and is characterized in that:
the steel platform of encorbelmenting is fixed to be set up in strenghthened type bearing steel-pipe column (1) one side, lay the balanced bearing system that constitutes by intensive steel pipe fastener formula support frame (6) and restrict its horizontal displacement on the steel platform of encorbelmenting, set up outer scaffold (7) and fix each other on the steel platform of encorbelmenting in the balanced bearing system outside, intensive steel pipe fastener formula support frame (6) are parallel to each other with outer scaffold (7), this balanced bearing system is located and encorbelments suspended component under, this balanced bearing system is used for supporting the unsettled component of encorbelmenting in the construction stage.
7. The superelevation residential conversion floor overweight cantilever suspended member support system of claim 6, wherein: a reinforced steel ring plate (2) is fixedly arranged on the inner wall of a reinforced bearing steel pipe column (1) at the joint of the reinforced bearing steel pipe column and the cantilever steel platform, and the reinforced bearing steel pipe column (1) is filled with concrete;
grout outlet holes (14) are uniformly distributed around the reinforced steel ring plate (2), and the middle part of the reinforced steel ring plate (2) is hollow to form grouting holes (15).
8. The superelevation residential conversion floor overweight cantilever suspended member support system of claim 6, wherein: the cantilever steel platform comprises a steel box girder bracket (3), a bailey truss (4) and an I-shaped steel distribution beam (5), wherein the bailey truss (4) is fixed on the steel box girder bracket (3), and the I-shaped steel distribution beam (5) is fixed on the bailey truss (4);
an auxiliary arc triangular support plate (9) is arranged at the joint of the steel box girder bracket (3) and the reinforced bearing steel pipe column in the overhanging steel platform and is used for improving the connection strength;
setting shaped hoops (10) between the bottom of the bailey truss (4) and the steel box girder bracket (3); this regularization clamp (10) are "[" structure, and this regularization clamp (10) span bailey frame (4) bottom sprag pole and both ends fixed welding are on steel box girder bracket (3), and this regularization clamp (10) and steel box girder bracket (3) keep parallel.
9. The superelevation residential conversion floor overweight cantilever suspended member support system of claim 8, wherein: the steel box girder bracket (3) adopts a rectangular box girder section, a sliding and disassembling platform (18) is additionally arranged at the overhanging end, the upper flange of the sliding and disassembling platform (18) is consistent with the upper flange of the steel box girder bracket (3), and webs on two sides are cut into triangles without lower flanges.
10. The superelevation residential conversion floor overweight cantilever suspended member support system of claim 8, wherein: evenly arrange reinforcing bar rivet (13) at I-steel distributor beam (5) upper wing board, in the pole setting of intensive shaped steel pipe fastener formula support frame (6) and outer scaffold (7) inserted reinforcing bar rivet (13) to the support body of convenient intensive shaped steel pipe fastener formula support frame (6) and outer scaffold (7) is established, restricts its horizontal displacement simultaneously, prevents to slide, ensures that intensive shaped steel pipe fastener formula support frame (6) and outer scaffold (7) are stable.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049415A (en) * | 2020-09-12 | 2020-12-08 | 北京市第三建筑工程有限公司 | Construction method of cornice formwork |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112049415A (en) * | 2020-09-12 | 2020-12-08 | 北京市第三建筑工程有限公司 | Construction method of cornice formwork |
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