CN110700579A - Truss type formwork support for overhanging cast-in-situ slab and using method thereof - Google Patents

Truss type formwork support for overhanging cast-in-situ slab and using method thereof Download PDF

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Publication number
CN110700579A
CN110700579A CN201911012768.XA CN201911012768A CN110700579A CN 110700579 A CN110700579 A CN 110700579A CN 201911012768 A CN201911012768 A CN 201911012768A CN 110700579 A CN110700579 A CN 110700579A
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CN
China
Prior art keywords
chord
truss
formwork support
quick
cast
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911012768.XA
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Chinese (zh)
Inventor
冯济平
冯韵朋
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Zhejiang Jiuzhu Construction Technology Co Ltd
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Zhejiang Jiuzhu Construction Technology Co Ltd
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Filing date
Publication date
Application filed by Zhejiang Jiuzhu Construction Technology Co Ltd filed Critical Zhejiang Jiuzhu Construction Technology Co Ltd
Priority to CN201911012768.XA priority Critical patent/CN110700579A/en
Publication of CN110700579A publication Critical patent/CN110700579A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/066Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/18Scaffolds 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

Abstract

The invention relates to a truss type formwork support for an overhanging cast-in-place slab and a using method thereof, which are mainly suitable for an overhanging cast-in-place floor system in steel structure engineering, structurally comprise truss chords and quick-release connecting pieces, and are characterized in that: the quick-release connecting piece comprises a vertical plate and a connecting plate, the connecting plate is fixed on a vertical central line of the vertical plate, and the upper chord and the lower chord of the truss chord are fixed with the quick-release connecting piece. The steel column is pre-screwed on the structural steel beam through the bolts during installation, the steel column and the structural steel beam are hoisted to the corresponding position of the steel column together, then fine adjustment is carried out, the bolts are screwed down, the bolts are unscrewed during disassembly, the bolts are unscrewed after the disassembly of the upper square timber, the wood formwork and the like is finished, and finally the steel column is taken down one by one through the lifting hooks.

Description

Truss type formwork support for overhanging cast-in-situ slab and using method thereof
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a truss type formwork support for an overhanging cast-in-place slab and a using method thereof, which are mainly suitable for an overhanging cast-in-place slab system in steel structure engineering.
Background
The full framing scaffold composed of steel pipes and fasteners is mainly adopted as a supporting system in a currently common framing scaffold system for bearing the weight and construction load of cast-in-place floors, templates and the like in the construction process, the full framing scaffold provides support for the construction of floors on the upper side by means of floors on the lower side, in steel structure engineering, main structural members such as beam columns and the like adopt the construction process of factory prefabrication and field assembly, but the floor structure still needs to be poured on site, hardening can be completed after a certain time, and the installation operation of the full framing scaffold on the lower side is needed after the hardening of the floors on the lower side is completed, so that the construction progress is greatly influenced, the advantage of high construction speed of the steel structure engineering is greatly weakened, and in addition, the full framing scaffold has the defects of large material consumption, low assembly and disassembly speed, inflexible use and the like.
Aiming at some problems of the existing template structure, the Chinese patent with application publication date of 2018, 11/6 and application publication number of CN108756220A discloses a cast-in-place concrete rib beam floor template support and a construction method thereof, wherein the template support comprises a main beam support and a secondary beam support, the main beam support with full length is directly arranged below a main beam which is criss-cross, the secondary beam support with full length is arranged below the secondary beam in any one direction of the two directions of the longitudinal direction and the transverse direction, the template support erection of the main beam and the secondary beam is preferentially met, and the problems that the module problem of socket type disc buckle type steel pipe supports caused by the fact that the template needs to be erected in a full space in the prior art is forced to be erected in a mixed mode, and the stress is ambiguous and the bearing capacity and the overall stability are reduced are solved. However, the main problems of limited construction speed, large material consumption and the like are not solved by the proposal, and the advantage of high construction speed of the steel structure cannot be fully exerted.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the truss type formwork support for the overhanging cast-in-place slab and the using method thereof, wherein the truss type formwork support is reasonable in structural design, safe, reliable, small in material consumption and rapid in disassembly and assembly.
The technical scheme adopted by the invention for solving the problems is as follows: this a truss-like formwork support for encorbelmenting cast-in-place board, including truss chord member and quick detach connecting piece, its characterized in that: the truss chord member is including fixed upper chord member, web member and lower chord member of each other, the right-hand member of upper chord member and the right-hand member of lower chord member are connected and are formed acute angle contained angle, the web member is fixed between upper chord member and lower chord member, and the web member is the three-section after bending, and the both ends of web member are fixed with the bottom surface of upper chord member, and the oblique right section bottom surface of web member and the upper surface laminating of lower chord member, the vertical section of web member and upper chord member and lower chord member formation little triangle inside casing, the quick detach connecting piece comprises riser and connecting plate, the up end of connecting plate is the inclined plane, and the vertical center line position at the riser is connected perpendicularly to the connecting plate, the upper portion of riser lies in the both sides of connecting plate and respectively is equipped with 1 bolt hole, the upper chord member level is fixed on the quick detach connecting piece, the lower chord member is fixed on the quick detach. The invention adopts a right-angled triangle truss chord member structure as a supporting member for bearing the load of construction of the overhanging cast-in-situ slab, so that the stress of the truss chord member is concentrated on one side, the side is connected with a quick-release connecting member, the truss chord member is fixed on a structural steel beam through the quick-release connecting member, the vertical pressure applied to the truss chord member is dispersed and converted, and the bearing capacity of the structure is ensured. The construction that the upper chord horizontal fixation was for the cast-in-place board of encorbelmenting improves work plane, and the lower chord slant is upwards fixed in order to provide the diagonal bracing, and the web member mainly used that is located between upper chord and the lower chord improves the structural stability of truss chord, prevents structural deformation, and the connecting plate firmly is connected quick detach connecting piece and upper chord and lower chord, reduces the safe risk that the junction became invalid and leads to.
Preferably, the truss chord and the quick-release connecting piece are fixed on the structural steel beam through the mounting bolt positioned at the bolt hole, and the vertical plate of the quick-release connecting piece is tightly attached to the web plate of the structural steel beam. The bolt fastening's connected mode has the swift advantage of easy dismounting, and firm in connection degree also can obtain guaranteeing, utilizes the web laminating of riser and structural steel roof beam, and increase lifting surface area improves stability.
Preferably, the left end surfaces of the upper chord and the lower chord are provided with grooves. When the upper chord and the lower chord are connected with the quick-release connecting piece, the connecting plate is fixed in the grooves of the left end faces of the upper chord and the lower chord, and the connection firmness is further improved.
Preferably, the truss chord member of the invention is made of steel pipe, and the quick release connecting piece is made of steel plate. The steel has high strength and long service life, and can be repeatedly used.
The utility model provides a use method for encorbelmenting cast-in-place slab's truss-like template support, its characterized in that: the truss-type formwork support is characterized in that a truss chord member and a quick connecting piece are manufactured before installation, the truss chord member and the quick connecting piece are connected in an automatic welding mode, a weld joint is inspected according to a secondary welding quality standard, the surfaces of the truss chord member and the quick connecting piece are sprayed or cast for derusting after welding is completed, and an anticorrosive coating is coated after derusting is completed. The automatic welding has high production efficiency and good welding quality, so that the connection reliability of the truss chord member and the quick connecting piece is high, the safety is good, the corrosion resistance of the member can be obviously improved by derusting the surface and coating the anticorrosive paint, and the service life is prolonged.
The utility model provides a use method for encorbelmenting cast-in-place slab's truss-like template support, its characterized in that: when the truss type formwork support is installed, firstly, bolt holes in a vertical plate are aligned with reserved bolt holes in a web plate of a structural steel beam, the structural steel beam is screwed for 5-10 circles by using mounting bolts, then the structural steel beam is hoisted to a corresponding position of a steel column and is installed completely, the mounting bolts are adjusted to enable the elevation of an upper chord member of each truss type formwork support to be consistent, the mounting bolts are screwed completely, finally, square timbers are arranged on the upper chord member at equal intervals, glued wood moulds are laid on the square timbers, reinforcing steel bars are laid on the wood moulds, and cast-in-situ cantilever plates are poured. The mounting bolts are firstly screwed for 5-10 circles, so that the truss type formwork support is connected to the structural steel beam and cannot easily fall off, and the purpose of non-direct screwing is to facilitate the operation of workers when the elevation of the upper chord is adjusted in the follow-up process.
The utility model provides a use method for encorbelmenting cast-in-place slab's truss-like template support, its characterized in that: when the truss type formwork support is disassembled, firstly, the mounting bolts are unscrewed for 5-10 circles, so that the front end of the truss type formwork support is inclined downwards, then the square timber and the wood formwork are disassembled, after the square timber and the wood formwork are completely disassembled, the mounting bolts are completely unscrewed, and the truss type formwork support is disassembled one by one. During disassembly, the mounting bolts are unscrewed for 5-10 circles firstly, the truss type formwork support is still effectively connected to the structural steel beam, the front end of the truss type formwork support is inclined downwards under the action of dead weight, a gap is formed between the truss type formwork support and the square timber and the wood formwork above the truss type formwork support, the square timber and the wood formwork are convenient to disassemble, the truss type formwork support also plays a role in protection at the moment, the square timber and the wood formwork can be prevented from suddenly falling off and injuring operating personnel in the disassembly process, after the square timber and the wood formwork are completely disassembled, the mounting bolts are completely unscrewed, the truss type formwork support is disassembled one by one, and construction safety is ensured.
The utility model provides a use method for encorbelmenting cast-in-place slab's truss-like template support, its characterized in that: the truss type template support adopts a two-end hooking method during hoisting, and the included angle between the lifting hook and the truss type template support is not less than 45 degrees; the truss type formwork support is vertically placed by adopting a two-pivot method during transportation and stacking, and wedge wood is laid below the formwork support. Due to the fact that the truss type formwork support is asymmetric in structure, the lifting safety and stability can be improved by the aid of the double-head hook lifting method, the formwork support is vertically placed during transportation and stacking, deformation or damage caused by mutual collision and extrusion of the formwork support is reduced, wedge wood is laid below the formwork support, the formwork support can be prevented from sliding, the formwork support is slightly lifted, and a certain waterproof effect is achieved.
Compared with the prior art, the invention has the following advantages and effects:
(1) the truss type formwork support is formed by combining the truss chords and the quick-release connecting pieces, stress of the formwork support is concentrated on one side, and the formwork support is integrally fixed on the steel beam on the side, so that the integral structure is good in stability and high in installation firmness, and the truss type formwork support is suitable for pouring of a cantilever cast-in-place floor slab.
(2) The quick-release connecting piece is connected with the steel beam through the bolt, is disassembled by utilizing self weight, is convenient to disassemble and assemble, can realize that the plate moves along with the beam, fully exerts the industrial advantages of steel structure engineering, simplifies construction operation and shortens construction period.
(3) The truss type formwork support adopts a disassembly and assembly method of firstly assembling and finally disassembling, the truss type formwork support is preliminarily fixed before the structural steel beam is hoisted, and is completely screwed after the elevation adjustment of the upper chord member is completed, so that the assembly difficulty is reduced, the assembly efficiency is improved, and when the truss type formwork support is disassembled finally, the truss type formwork support can play a role in supporting and protecting during the disassembly process of the square timber and the wood formwork, so that personnel who act on the square timber and the wood formwork are prevented from being suddenly dropped off and injured, and the construction safety is improved.
Drawings
In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic front view of an embodiment of the present invention.
Fig. 2 is a schematic front view of a truss-type formwork support according to an embodiment of the present invention.
Fig. 3 is a schematic top view of a truss-type formwork support according to an embodiment of the present invention.
Fig. 4 is a schematic top view of the left end of the upper chord according to the embodiment of the invention.
Fig. 5 is a schematic front view of a quick release connector according to an embodiment of the invention.
Fig. 6 is a schematic right-view structural diagram of the quick release connector according to the embodiment of the invention.
Description of reference numerals: 1. a truss chord; 2. a quick release connector; 3. an upper chord; 4. a web member; 5. a lower chord; 6. a vertical plate; 7. a connecting plate; 8. a web; 9. bolt holes; 10. installing a bolt; 11. a structural steel beam; 12. a groove; 13. square wood; 14. wood molding; 15. and (3) a cast-in-place plate.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1 to 6, the truss-type formwork support for overhanging cast-in-situ slabs according to the embodiment of the invention comprises a truss chord member 1 and a quick release connector 2.
The truss chord member 1 of this embodiment includes reciprocal anchorage's last chord member 3, web member 4 and lower chord member 5, go up chord member 3, web member 4 and lower chord member 5 are made by square steel pipe, higher intensity has, the right-hand member of lower chord member 5 is the inclined plane, and form acute angle contained angle in inclined plane department and the right-hand member welding of last chord member 3, web member 4 is located between last chord member 3 and lower chord member 5, web member 4 is the three-section after bending, the both ends of web member 4 and the bottom surface welded fastening of last chord member 3, the oblique section bottom surface in right side of web member 4 and the top surface laminating and the welded fastening of lower chord member 5, the vertical section of web member 4 and last chord member 3 and the welding of lower chord member 5 form stable triangle-shaped inside casing, the existence of web member 4 has improved truss chord member 1's whole firmness and stability by a wide margin.
The quick detach connecting piece 2 of this embodiment comprises riser 6 and connecting plate 7, and the up end of connecting plate 7 is the inclined plane, and connecting plate 7 welds perpendicularly in the vertical center line position of riser 6, and the upper portion of riser 6 still is equipped with 2 bolt holes 9, and bolt hole 9 symmetric distribution is in the both sides of connecting plate 7.
Truss chord member 1 and quick detach connecting piece 2 of this embodiment adopt automatic weld's mode to be connected, after the welding is accomplished, check according to second grade welding quality standard to all welding seams departments, must weld again after the welding seam is clean to the place that welds unqualifiedly, it is concrete, the welding of 3 horizontal welding of upper chord member is on quick detach connecting piece 2, welding 5 slant of lower chord member upwards is on quick detach connecting piece 2, the left end center part of upper chord member 3 and lower chord member 5 all processes there is vertical recess 12, the width of recess 12 is the same with the thickness of connecting plate 7, connecting plate 7 and recess 12 block and welding when fixed, can effectively restrict truss chord member 1 in the rotation of horizontal direction, improve the firmness of connecting. After all parts are welded firmly, the surfaces of the truss chord members 1 and the surfaces of the quick connecting members 2 are sprayed for derusting, and anticorrosive coatings are coated after derusting is finished, so that the corrosion resistance of the components is improved, and the service life is prolonged.
In the installation of the embodiment, firstly, bolt holes 9 on a vertical plate 6 are aligned with reserved bolt holes on a web plate 8 of a structural steel beam 11, the vertical plate 6 of a quick-release connecting piece 2 is attached to the web plate 8 of the structural steel beam 11, then the mounting bolts 10 are screwed for 5-10 circles, then the structural steel beam 11 and a truss type formwork support are hoisted to the corresponding position of a steel column together and the installation is finished, then the mounting bolts 10 are adjusted to make the elevation of an upper chord 3 of each truss type formwork support consistent, then the mounting bolts 10 are thoroughly screwed, when the upper part of the vertical plate 6 is attached to the structural steel beam 11 through the mounting bolts 10, the lower part of the vertical plate 6 can be automatically and firmly propped against the structural steel beam 11 under the self-weight of a truss chord 1 and the load-bearing above the vertical plate, because in steel structure engineering, a steel beam prefabricated member 1 is usually a progress, the, the industrialization advantage of full play steel construction engineering shortens construction cycle, can also save the steel quantity, reduce cost, adopts bolted connection easy dismounting swift, lays square timber 13 on last chord member 3 equidistant at last, lays veneer wood former 14 on the square timber 13, lays the reinforcing bar on the wood former 14 and pours cast-in-place board 15 of encorbelmenting. The square timber 13, the wood formwork 14 and the cast-in-place slab 15 are all manufactured by the existing mature construction process, so that the construction quality can be effectively guaranteed, the labor efficiency of workers can be fully exerted, and the construction period can be further shortened.
In the disassembly process of the truss-type formwork support, the truss-type formwork support is still effectively connected to the structural steel beam 11 and cannot fall off, but a gap is formed between the truss-type formwork support and the square timber 13 and the wood formwork 14, so that the square timber 13 and the wood formwork 14 above the truss-type formwork support can be conveniently disassembled, the truss-type formwork support can play a supporting and protecting role in the disassembly process of the square timber 13 and the wood formwork 14, operators are prevented from being suddenly dropped and injured by smashing the square timber 13 or the wood formwork 14, after the square timber 13 and the wood formwork 14 are completely disassembled, the mounting bolts 10 are completely unscrewed, the truss-type formwork support is taken down one by one through the lifting hooks, and the construction safety is ensured.
The two-end hooking method is adopted in the hoisting process of the truss-type formwork support, and the included angle between the lifting hook and the truss-type formwork support is not less than 45 degrees so as to ensure the hoisting safety and stability; the truss type formwork support is vertically placed by adopting a two-pivot method during transportation and stacking so as to reduce deformation or damage of the formwork support caused by mutual collision and extrusion, and wedge timbers are laid below the formwork support to prevent the wedge timbers from sliding and can slightly lift the formwork support, so that a certain waterproof effect is achieved.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (8)

1. The utility model provides a truss-like formwork support for encorbelmenting cast-in-place board, includes truss chord member (1) and quick detach connecting piece (2), its characterized in that: the truss chord member (1) comprises an upper chord member (3), a web member (4) and a lower chord member (5) which are fixed mutually, the right end of the upper chord member (3) and the right end of the lower chord member (5) are connected to form an acute angle included angle, the web member (4) is fixed between the upper chord member (3) and the lower chord member (5), the web member (4) is three-section after being bent, the two ends of the web member (4) are fixed with the bottom surface of the upper chord member (3), the bottom surface of the right oblique section of the web member (4) is attached to the upper surface of the lower chord member (5), the vertical section of the web member (4) and the upper chord member (3) and the lower chord member (5) form a small triangular inner frame, the quick-release connecting member (2) is composed of a vertical plate (6) and a connecting plate (7), the upper end surface of the connecting plate (7) is an inclined plane, the connecting plate (7) is vertically connected to the central line of the vertical plate (6), the upper part of the vertical plate (6) is positioned at the two sides of the connecting plate, the upper chord (3) is horizontally fixed on the quick-release connecting piece (2), and the lower chord (5) is obliquely fixed on the quick-release connecting piece (2) upwards.
2. A truss-like formwork support for overhanging cast-in-place slabs as claimed in claim 1, wherein: truss chord member (1) and quick detach connecting piece (2) are fixed on structure girder steel (11) through construction bolt (10) that are located bolt hole (9) department, and riser (6) of quick detach connecting piece (2) closely laminate with web (8) of structure girder steel (11).
3. A truss-like formwork support for overhanging cast-in-place slabs as claimed in claim 1, wherein: the left end faces of the upper chord (3) and the lower chord (5) are provided with grooves (12).
4. A truss-like formwork support for overhanging cast-in-place slabs as claimed in claim 1, wherein: the truss chord member (1) is made of steel pipes, and the quick-release connecting piece (2) is made of steel plates.
5. A method of using a truss type formwork support for overhanging a cast in situ slab as claimed in any one of claims 1 to 4, wherein: truss-like formwork support makes truss chord member (1) and quick-operation joint spare (2) earlier before the installation, truss chord member (1) and quick-operation joint spare (2) adopt automatic weld's mode to connect to the butt weld is examined according to second grade welding quality standard, sprays or throws the rust cleaning to the surface of truss chord member (1) and quick-operation joint spare (2) after the welding is accomplished, coating anticorrosive paint after the rust cleaning is accomplished.
6. A method of using a truss type formwork support for overhanging a cast in situ slab as claimed in claim 5, wherein: when the truss type formwork support is installed, firstly, bolt holes (9) in a vertical plate (6) are aligned with reserved bolt holes in a web plate (16) of a structural steel beam (11), the structural steel beam (11) is hoisted to a corresponding position of a steel column and installed completely, the installation bolts (10) are adjusted to enable the elevation of an upper chord (3) of each truss type formwork support to be consistent, then the installation bolts (10) are thoroughly tightened, finally square timbers (13) are arranged on the upper chord (3) at equal intervals, a glued wood formwork (14) is laid on the square timbers (13), and reinforcing steel bars are laid on the wood formwork (14) and a cast-in-situ cantilever slab (15) is poured.
7. A method of using a truss type formwork support for overhanging a cast in situ slab as claimed in claim 5, wherein: when the truss type formwork support is disassembled, firstly, the mounting bolts (10) are unscrewed for 5-10 circles, so that the front end of the truss type formwork support is inclined downwards, then the square timber (13) and the wood mould (14) are disassembled, after the square timber (13) and the wood mould (14) are completely disassembled, the mounting bolts (10) are completely unscrewed, and the truss type formwork support is disassembled one by one.
8. A method of using a truss type formwork support for overhanging a cast in situ slab as claimed in claim 5, wherein: the truss type template support adopts a two-end hooking method during hoisting, and the included angle between the lifting hook and the truss type template support is not less than 45 degrees; the truss type formwork support is vertically placed by adopting a two-pivot method during transportation and stacking, and wedge wood is laid below the formwork support.
CN201911012768.XA 2019-10-23 2019-10-23 Truss type formwork support for overhanging cast-in-situ slab and using method thereof Pending CN110700579A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113279582A (en) * 2021-06-10 2021-08-20 浙江久筑建筑技术有限公司 Hanging construction method for overhanging and hanging type cast-in-place plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113279582A (en) * 2021-06-10 2021-08-20 浙江久筑建筑技术有限公司 Hanging construction method for overhanging and hanging type cast-in-place plate

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