CN115075551A - Construction method of safe and stable cantilever incremental structure high formwork system - Google Patents
Construction method of safe and stable cantilever incremental structure high formwork system Download PDFInfo
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- CN115075551A CN115075551A CN202210762207.7A CN202210762207A CN115075551A CN 115075551 A CN115075551 A CN 115075551A CN 202210762207 A CN202210762207 A CN 202210762207A CN 115075551 A CN115075551 A CN 115075551A
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/06—Falsework, 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
- E04G13/066—Falsework, 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
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/001—Corner fastening or connecting means for forming or stiffening elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a safe and stable construction method of a cantilever incremental structure high formwork system, which belongs to the technical field of building construction and comprises the following steps: s1, determining data; s2, drawing a line; s3, arranging auxiliary parts; and S4, building layer by layer. The invention adopts a mode of one-time erection and integral arrangement, changes the existing method of erecting each layer of incremental cantilever plates according to the independent high-support die, reduces the reinforcing workload of the independent high-support die for cross bracing or zigzag bracing, effectively improves the stability of the high-support die frame of the cantilever plates, simultaneously reduces the height-width ratio of each layer of the cantilever plate high-support die frame which is increased along with the number of layers by integral arrangement and erection, ensures the anti-overturning stability of the high-support die frame, improves the shearing force of the internal corner formed by the height difference of the frame body by increasing the shearing diagonal rods, reduces the occurrence probability of safety accidents, and has good use and popularization values.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a safe and stable construction method of a cantilever incremental structure high formwork system.
Background
At present, in order to achieve the appearance elevation effect in the building engineering, for example, public buildings such as administrative service centers, cultural libraries and libraries, the design and the shape are carefully cut, a large number of inverted cone structures are highlighted, the boards picked on the upper layer are wider than those picked on the lower layer, the visual sense and the aesthetic feeling are formed, and the market recognition is gained.
However, in the construction process of such a structure, the structural support frame at each layer of the board picking position is a high-branch formwork, and the independent height-width ratio of the high-branch formwork in each layer of the increasing board picking area is large, so that the stability of the frame body is poor, and safety accidents are easily caused. The existing construction mode is that the incremental cantilever plates on each layer are erected according to an independent high formwork, the stability is improved through reinforcement measures, but a large number of reinforcement measures increase the construction difficulty while causing waste of manpower and material resources, and the workload of operators is increased.
Disclosure of Invention
In order to solve the technical problems, the inventor obtains the technical scheme of the invention through practice and summary, and the invention discloses a safe and stable construction method of a cantilever incremental structure high formwork system, which comprises the following steps:
s1, determining data: firstly, determining the step pitch of the last layer of cantilever plate high-formwork support to be 1500mm, transversely setting the number of upright rods according to the width of the last layer of incremental cantilever plates, calculating the safety and stability of the last layer of cantilever plate high-formwork support according to the fixed load and the live load during construction of the last layer of incremental cantilever plates, determining the longitudinal pitch of the upright rods, calculating the vertical rod transverse pitch of the previous layer of incremental cantilever plates according to the step pitch and the vertical rod longitudinal pitch of other layers of cantilever plate high-formwork support, and so on;
s2, drawing lines: drawing vertical and horizontal arrangement lines of vertical rods in each layer of board-picking high-support mold frame in the overhanging incremental structure high-support mold system on the floor or ground, then combining the board-picking high-support mold frames into a whole, and erecting scaffold bodies according to the step pitch of 1500mm and the vertical rod pitch;
s3, arranging auxiliary parts: after a high formwork system with a cantilever increasing structure at a certain height is built, arranging a cross brace and a sub-character brace on the frame body according to the specification;
s4, building layer by layer: when the second floor of construction increases progressively the structure of encorbelmenting, the high formwork system of the structure that increases progressively of encorbelmenting this moment has formed the difference in height in the first floor increases progressively board and the second floor increases progressively board department of encorbelmenting, it sets up the shearing down tube for the central point to increase progressively nearest scaffold frame pole setting and horizontal pole node below board end portion right side at the second floor, simultaneously, when construction to second floor structure reaches above, one deck and below floor layer frame need be demolishd and carry out the consolidation point with one deck and below regional incremental structure high formwork and nearest frame post and be connected.
Further preferably, the number of the vertical rods in the step S1 is at least 2, and the vertical distance between the vertical rods of each layer of the high formwork support is at least 900 mm.
Further preferably, in S1, when only one vertical rod is needed for calculating the lateral distance between the vertical rods of each layer of high formwork erection, the calculation is performed according to two vertical rods, one vertical rod is located at the root of the incremental cantilever plate on the layer, and the other vertical rod is located at the end of the incremental cantilever plate, when the number of layers of the incremental structure is greater than 6, the longitudinal and lateral distances between the vertical rods are determined, and the lateral distances between the vertical rods of the incremental cantilever plates on the other layers are determined by checking the incremental layer and the incremental layer.
Further preferably, in S2, when each layer of the incremental cantilever slab structure is constructed, the scaffold frame body only needs to be set up to the height of the layer, and the frame bodies beyond the range of the layer of the incremental cantilever slab cannot exceed the two-step frame height of the layer of the incremental cantilever slab.
Further preferably, the shearing diagonal bar in the S4 is arranged at an angle of 45 ° to 60 °, and both ends of the shearing diagonal bar respectively penetrate into the two adjacent layers of the high formwork with the incremental structure and are connected and fixed with the vertical bar.
Further preferably, the distance between the shear diagonal and the vertical rod is 3 span.
Compared with the prior art, the invention can obtain the following technical effects:
according to the construction method of the safe and stable cantilever type incremental structure high formwork system, the mode of one-time erection and integral arrangement is adopted, the existing method that each layer of incremental cantilever plate is erected according to the independent high formwork is changed, the reinforcing workload of the independent high formwork shear support or zigzag support is reduced, and the stability of the cantilever plate high formwork support is effectively improved.
Meanwhile, the height-width ratio of each layer of cantilever plate high-support die frame which is increased along with the number of layers is reduced by integrally arranging and erecting, the anti-overturning stability of the high-support die frame is ensured, the shearing force of the internal corner formed by the height difference of the frame body is improved by adding the shearing inclined rod, the occurrence probability of safety accidents is reduced, and the high-support die frame has good use and popularization values.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic plan view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Examples
Taking three layers of ascending cantilever plates as an example, as shown in fig. 1-2, a cantilever ascending structure high formwork system is composed of a floor frame 1, three frame columns 2, a cantilever plate high formwork group, an ascending cantilever plate group and a shearing inclined rod 6; the cantilever plate high-support formwork group comprises a cantilever plate high-support formwork I (3), a cantilever plate high-support formwork II (4) and a cantilever plate high-support formwork III (5), the incremental cantilever plate group comprises an incremental cantilever plate I (31), an incremental cantilever plate II (41) and an incremental cantilever plate III (51), and the cantilever plate high-support formwork group is correspondingly matched with the incremental cantilever plate group.
A construction method of a safe and stable overhanging incremental structure high formwork system comprises the following specific steps:
s1, determining data: firstly, determining the step pitch of a third cantilever slab high-support die carrier (5) to be 1500mm, transversely setting the number of upright rods to be 2 according to the width of an incremental cantilever slab III (51), calculating the safety stability of the third cantilever slab high-support die carrier (5) according to the fixed load and the live load during construction of the incremental cantilever slab III (51), determining the longitudinal pitch of the upright rods to be 900mm, and so on, thus obtaining that the step pitches of a second cantilever slab high-support die carrier (4) and a first cantilever slab high-support die carrier (3) are 1500mm, and the longitudinal pitches of the upright rods of each layer of the cantilever slab high-support die carrier are consistent and are 900 mm;
s2, drawing lines: drawing vertical and horizontal arrangement lines of vertical rods in each layer of cantilever plate high-formwork support frame in a cantilever incremental structure high-formwork system on a floor or ground, then combining each layer of cantilever plate high-formwork support frame into a whole, erecting scaffold bodies according to step pitch 1500mm and vertical rod pitch, and when each layer of incremental cantilever plate structure is constructed, the scaffold bodies only need to be erected to the height of the layer, and the frame bodies exceeding the range of the layer of incremental cantilever plates cannot exceed the height of the layer of incremental cantilever plates by two steps;
s3, arranging auxiliary parts: after a high formwork system with a cantilever increasing structure at a certain height is built, arranging a cross brace and a sub-character brace on the frame body according to the specification;
s4, building layer by layer: when a second incremental cantilever plate (41) is constructed, height difference is formed at the positions of a first incremental cantilever plate (31) and a second incremental cantilever plate (41) of an overhanging incremental structure, a shearing inclined rod (6) is arranged at the central point at the position of the nearest scaffold upright rod and the transverse rod node at the right lower part of the end part of the second incremental cantilever plate (41), the shearing inclined rod (6) is arranged at 45-60 degrees, two ends of the shearing inclined rod respectively penetrate into two adjacent layers of high-support formwork of the incremental structure and are connected and fixed with the upright rod, the longitudinal distance between the shearing inclined rod (6) and the upright rod is 3-span, and meanwhile, when the two-layer structure or above is constructed, the frames (1) of one layer or below need to be disassembled, and the height areas of one layer or below are connected with the nearest frame column (2) at a consolidation point.
Further, in order to optimize the frame body setting quantity, when only one vertical rod is needed for calculating the vertical rod transverse distance of each layer of cantilever plate high-support frame, the two vertical rods are implemented, one vertical rod is arranged at the root of the incremental cantilever plate on the layer, and the other vertical rod is arranged at the end part.
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.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A construction method of a safe and stable overhanging incremental structure high formwork system is characterized by comprising the following steps:
s1, determining data: firstly, determining the step pitch of the last layer of cantilever slab high-support formwork to be 1500mm, transversely setting the number of upright rods according to the width of the last layer of incremental cantilever slabs, calculating the safety and stability of the last layer of cantilever slab high-support formwork according to the fixed load and the live load during construction of the last layer of incremental cantilever slabs, determining the longitudinal pitch of the upright rods, calculating the transverse pitch of the upright rods of the previous layer of incremental cantilever slabs according to the step pitch and the longitudinal pitch of the upright rods of other layers of cantilever slab high-support formwork, and so on;
s2, drawing lines: drawing vertical and horizontal arrangement lines of vertical rods in each layer of board-picking high-support mold frame in the overhanging incremental structure high-support mold system on the floor or ground, then combining the board-picking high-support mold frames into a whole, and erecting scaffold bodies according to the step pitch of 1500mm and the vertical rod pitch;
s3, arranging auxiliary parts: after a high formwork system with a cantilever increasing structure at a certain height is built, arranging a cross brace and a sub-character brace on the frame body according to the specification;
s4, building layer by layer: when the second floor of construction increases progressively the structure of encorbelmenting, the high formwork system of the structure that increases progressively of encorbelmenting this moment has formed the difference in height in the first floor increases progressively board and the second floor increases progressively board department of encorbelmenting, it sets up shearing down tube (6) for the central point to increase progressively nearest scaffold frame pole setting and horizontal pole node below board end portion right side at the second floor, simultaneously, when construction to the second floor structure reaches above, one deck and below floor layer frame (1) need be demolishd and carry out consolidation point with one deck and below floor height region increase progressively the high formwork of structure and nearest frame post (2) and be connected.
2. The construction method of the safe and stable overhanging gradually-increased structure high formwork system according to claim 1, characterized in that: the number of the vertical rods in the S1 is at least 2, and the vertical rod longitudinal distance of each layer of the high formwork support of the cantilever slabs is at least 900 mm.
3. The construction method of the safe and stable overhanging gradually-increased structure high formwork system according to claim 2, characterized in that: in S1, when only one vertical rod is needed for calculating the vertical rod transverse distance of each layer of cantilever plate high formwork support, the implementation is carried out according to two vertical rods, one vertical rod is arranged at the root of the incremental cantilever plate on the layer, and the other vertical rod is arranged at the end part of the incremental cantilever plate.
4. The construction method of the safe and stable overhanging gradually-increased structure high formwork system according to claim 1, characterized in that: in S2, when each layer of incremental cantilever plate structure is constructed, the scaffold body only needs to be erected to the height of the layer, and the frame body beyond the range of the incremental cantilever plate of the layer cannot exceed the two-step frame height of the incremental cantilever plate of the layer.
5. The construction method of the safe and stable overhanging gradually-increased structure high formwork system according to claim 1, characterized in that: the shearing diagonal rod (6) in the S4 is arranged at an angle of 45-60 degrees, and two ends of the shearing diagonal rod (6) respectively penetrate into the two adjacent layers of the high formwork support with the incremental structure and are fixedly connected with the vertical rod.
6. The construction method of the safe and stable overhanging gradually-increased structure high formwork system according to claim 5, characterized in that: the shearing inclined rod (6) and the vertical rod are arranged in a span mode at a vertical rod longitudinal distance of 3.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538896A (en) * | 2009-04-03 | 2009-09-23 | 标力建设集团有限公司 | Construction method for jettied structure at high attitude of high-rise building |
| CN113550578A (en) * | 2021-06-18 | 2021-10-26 | 中国五冶集团有限公司 | High-altitude overhanging structure formwork support and upper protection system construction method |
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- 2022-06-29 CN CN202210762207.7A patent/CN115075551B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538896A (en) * | 2009-04-03 | 2009-09-23 | 标力建设集团有限公司 | Construction method for jettied structure at high attitude of high-rise building |
| CN113550578A (en) * | 2021-06-18 | 2021-10-26 | 中国五冶集团有限公司 | High-altitude overhanging structure formwork support and upper protection system construction method |
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