Method for simultaneously installing formworks of columns and beams of multi-layer concrete frame

Abstract

The invention discloses a method for simultaneously installing formworks of a multi-layer concrete frame column and a multi-layer concrete frame beam, which comprises the steps of column formwork system installation after foundation construction, frame beam formwork system installation and multi-layer synchronous construction, wherein 8 # or 10 # square and round buckles, back squares and formworks are adopted for the column formwork system and are reinforced according to specific intervals; the frame beam template system adopts a ring lock type scaffold, a tripod, a top support and a transverse and vertical square steel back square to form stable support through scientific arrangement; at least three layers serve as a construction unit, and column beam formwork installation and concrete construction are completed synchronously. The problems that traditional layered construction is low in efficiency and long in construction period are solved, a multi-layer synchronous construction mode is combined, the construction efficiency is greatly improved, the formwork installation quality is guaranteed, the site construction progress is shortened, the construction cost is reduced, and the construction method is suitable for construction of the multi-layer concrete frame structure with the small layer height and the large layer number.

Description

Technical Field

[0001] This invention relates to the field of synchronous construction technology for dense multi-story frame columns and beams, and more specifically, to a method for simultaneous installation of formwork for multi-story concrete frame columns and beams. Background Technology

[0002] In industrial and civil buildings, there are numerous multi-story concrete frame structures with low floor heights and many floors (such as freight elevator shafts, small factories, and multi-story ancillary buildings). The traditional construction method for these structures is "layer-by-layer construction from the bottom up," meaning that after the concrete pouring and curing of the next floor's frame columns and beams is completed, the formwork for that floor is removed, and the formwork for the next floor is re-erected and construction begins. This method has many technical drawbacks:

[0003] Low construction efficiency: During the layered construction process, the formwork erection, dismantling and concrete curing procedures are cumbersome to connect. Each layer of construction requires repeating the "erection-pouring-curing-dismantling" process, resulting in long waiting times for each procedure and a significant extension of the overall construction cycle.

[0004] Low resource utilization: Templates, support frames and other turnover materials need to be frequently disassembled and transported, which not only increases labor costs, but also reduces the efficiency of turnover material use and causes resource waste.

[0005] Construction quality control is difficult: In layered construction, the connection between the upper and lower layer formwork support systems is prone to deviation, and frequent disassembly and assembly can easily lead to formwork deformation and loosening of the support structure, affecting the verticality, flatness and node connection quality of the frame columns and beams.

[0006] Unable to meet the needs of dense structures: For frame structures with many floors (such as around 10 floors) and low floor height, the traditional layered construction mode is difficult to meet the engineering needs of rapid construction, which restricts the overall project progress efficiency. Summary of the Invention

[0007] To address the problems existing in the prior art, the purpose of this invention is to provide a method for simultaneous installation of formwork for multi-story concrete frame columns and beams, thereby achieving a synergistic improvement in construction efficiency, quality, and economy, and reducing the risk of formwork deformation.

[0008] The present invention adopts the following technical solution:

[0009] This invention discloses a method for simultaneous installation of formwork for columns and beams in a multi-story concrete frame, comprising the following steps:

[0010] Step S1: After the foundation construction is completed, start the formwork installation work for the multi-story concrete frame structure;

[0011] Step S2: Column formwork system installation: The column formwork system is constructed using square and round buckles, back square buckles, and formwork. The spacing between each component is determined according to the load calculation. First, the formwork is processed according to the column width and height dimensions, and then the formwork is installed. Square steel is selected for back square buckles and fixed to the outside of the formwork. Finally, square and round buckles are installed for reinforcement. The first square and round buckle of each layer is 20-30cm away from the bottom of the column.

[0012] Step S3: Installation of the frame beam formwork system: The frame beam formwork system is constructed using type B disc-lock scaffolding, back supports, and formwork. The spacing between each component is determined based on load calculations. First, vertical uprights are installed on both sides of the beam. Uprights are arranged along the longitudinal direction of the beam according to the load calculation spacing, and the horizontal bar spacing is set according to the load calculation. Tripods are installed at the vertical upright nodes at the bottom of each beam. The installation direction of the tripods is consistent with or perpendicular to the longitudinal direction of the beam and set inward. Then, the top support, horizontal back supports, and longitudinal back supports are placed on the tripods in sequence. Finally, the bottom formwork of the beam is installed.

[0013] Step S4: Multi-layer synchronous construction: Treat at least 3 layers of frame columns and beams as a construction unit, and simultaneously complete the installation and reinforcement of column formwork and beam formwork within the unit. After the concrete pouring and curing meet the standards, proceed with the formwork installation work for the next construction unit.

[0014] Furthermore, in step S2, the back square, the transverse back square, and the longitudinal back square are square steel, and the specifications of the back square are 50mm×50mm×3mm.

[0015] Furthermore, in step S3, the spacing of the vertical poles along the longitudinal direction of the beam and the step distance of the horizontal poles are determined by structural mechanics load calculations to ensure the load-bearing strength of the support system.

[0016] Furthermore, in step S3, the tripod and the vertical pole node are detachably connected and locked in place by fasteners after installation to prevent displacement during construction.

[0017] Furthermore, in step S3, the transverse back side and the longitudinal back side are arranged perpendicular to each other, the longitudinal back side is placed above the transverse back side, the transverse back side is attached to the top support, the longitudinal back side is attached to the transverse back side, and the bottom formwork of the beam is attached to the longitudinal back side for fixation.

[0018] Furthermore, in step S4, the number of construction units is 3, that is, the formwork installation, concrete pouring and curing processes are completed simultaneously for the frame columns and beams of every 3 floors.

[0019] Furthermore, the top support is an adjustable top support, and its height can be adjusted by rotation to keep the lateral back side horizontal, ensuring the flatness of the beam bottom formwork installation.

[0020] Beneficial effects

[0021] Construction efficiency is greatly improved: The "multi-layer synchronous construction" mode is adopted, which treats at least 3 floors as a construction unit, avoiding the cumbersome process of "one floor at a time" in traditional layered construction, reducing the waiting time for process connection, and greatly shortening the overall construction period; for example, a 9-story frame structure can be reduced from the traditional 9-layer construction to 3-unit construction, improving construction efficiency by more than 60%.

[0022] Construction quality is more guaranteed: The column formwork is reinforced with square and round buckles, forming a multi-point uniform force system with back squares, which effectively prevents formwork deformation and ensures the verticality and dimensional accuracy of the column; the beam formwork uses a combination of disc-lock scaffolding, tripods and double-layer square steel back squares, which provides a support system with high rigidity and stability, avoiding the problem of easy loosening of traditional supports, and ensuring the flatness of the beam bottom and the quality of the joint connection; at the same time, multi-layer synchronous construction reduces the number of times the formwork is disassembled and reassembled, reducing the risk of formwork deformation.

[0023] Highly adaptable and easy to operate: This installation method is highly adaptable to frame structures with low floor height and many floors, and construction units can be flexibly divided according to the actual number of floors; all components are standardized components, which are easy to install and disassemble, without the need for complicated construction equipment, and a single person can complete the installation and adjustment of core components, thus lowering the construction threshold. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of column formwork installation according to an embodiment of the present invention;

[0025] Figure 2 This is an elevation view of a frame beam scaffolding support according to an embodiment of the present invention;

[0026] Figure 3 This is a plan view of a frame beam scaffolding support according to an embodiment of the present invention;

[0027] Figure 4 This is a diagram of a beam-bottom scaffolding support node according to an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] As shown in the figure, this invention discloses a method for simultaneous installation of formwork for columns and beams in a multi-story concrete frame, comprising the following steps:

[0030] Step S1: After the foundation construction is completed, start the formwork installation work for the multi-story concrete frame structure;

[0031] Step S2: Column formwork system installation: The column formwork system is constructed using Fangyuan Buckle 1, Back Fang 2 and formwork. The spacing between each component is determined according to the load calculation. First, the formwork is processed according to the column width and column height dimensions, and then the formwork is installed. Back Fang 1 is made of square steel and fixed to the outside of the formwork. Finally, Fangyuan Buckle 1 is installed for reinforcement. The first Fangyuan Buckle 1 of each layer is 20-30cm away from the bottom of the column.

[0032] Step S3: Installation of the frame beam formwork system: The frame beam formwork system is constructed using disc-lock scaffolding, back supports, and formwork 4. The spacing between each component is determined according to the load calculation. First, vertical uprights 5 are set on both sides of the beam. The uprights 5 are arranged along the longitudinal direction of the beam according to the load calculation spacing. The horizontal bars 3 are set according to the load calculation step spacing. Tripods 6 are installed at the nodes of the vertical uprights 5 at the bottom of each layer of the beam. The installation direction of the tripods 6 is consistent with the longitudinal direction of the beam or perpendicular to the longitudinal direction of the beam and set inward. Then, the top support 7, the horizontal back support 8, and the longitudinal back support 9 are placed on the tripods 6 in sequence. Finally, the bottom formwork 11 of the beam is installed. The joints of the formwork are treated with sealant to prevent grout leakage.

[0033] Step S4: Multi-layer synchronous construction: Treat at least 3 layers of frame columns and beams as a construction unit, and simultaneously complete the installation and reinforcement of column formwork and beam formwork within the unit. After the concrete pouring and curing meet the standards, proceed with the formwork installation work for the next construction unit.

[0034] The division of the construction into three layers as a unit not only matches the standard 14-day curing period for concrete, but also achieves the centralized and efficient use of construction resources. Compared with traditional layered construction, it reduces the number of formwork disassembly and assembly and process connection times by 2 / 3. At the same time, synchronous pouring makes the joints between the upper and lower columns and beams more tightly connected and the overall structure stronger.

[0035] When constructing multiple layers simultaneously, refer to the following example:

[0036] Construction Unit Division: The 9-story frame is divided into 3 construction units. The first unit consists of +2.05m, +4.05m, and +6.05m floors; the second unit consists of +8.05m, +10.05m, and +12.55m floors; and the third unit consists of +14.1m, +15.3m, and +16.5m floors.

[0037] Synchronous work: The installation and reinforcement of the column and beam formwork of the three floors are completed simultaneously in each unit. After the installation is completed, a joint acceptance is carried out to ensure that the verticality of the columns and the flatness of the bottom of the beams meet the requirements.

[0038] Concrete construction and curing: After acceptance, pumped concrete is used to simultaneously pour the columns and beams of the three floors of this unit. After pouring, the concrete is covered with geotextile and watered for 14 days. After curing meets the standards, the formwork is removed and the construction of the next unit begins.

[0039] In one embodiment of the present invention, in step S2, the back square, the transverse back square and the longitudinal back square are square steel, and the specifications of the back square are 50mm×50mm×3mm.

[0040] In one embodiment of the present invention, in step S3, the spacing of the vertical poles along the longitudinal direction of the beam and the step distance of the horizontal poles are determined by structural mechanics load calculation to ensure the bearing strength of the support system.

[0041] In one embodiment of the present invention, in step S3, the tripod 6 and the vertical pole 5 are connected in a detachable manner and are locked and fixed by fasteners after installation to prevent displacement during construction.

[0042] The detachable locking connection between the tripod and the disc buckle uprights ensures the stability of the support system while providing convenient assembly and disassembly. The double-layer vertical arrangement of the back support and the adjustable top support ensure that the flatness deviation of the beam bottom formwork is ≤2mm. At the same time, the sealant treatment of the joints effectively prevents grout leakage, improving the appearance quality and structural strength of the beam.

[0043] In one embodiment of the present invention, in step S3, the transverse back support 8 and the longitudinal back support 9 are arranged perpendicular to each other, the longitudinal back support 9 is placed above the transverse back support 8, the transverse back support 8 is attached to the top support, the longitudinal back support 9 is attached to the transverse back support 8, and the bottom template of the beam is attached to the longitudinal back support 9 for fixation.

[0044] Tripods 6 are installed on the scaffold uprights 10. Top supports 7 are installed on one side of the top of the tripods 6. Two horizontal back supports 8 are placed on the top of the top supports 7, and longitudinal back supports 9 are installed on the horizontal back supports 8.

[0045] The double transverse back support arrangement increases the contact area with the top support, disperses the load transmitted from the longitudinal back support, avoids back support deformation caused by local stress concentration, and further improves the load-bearing stability of the beam formwork support system. It can be adapted to construction scenarios with larger beam cross-sections and stronger loads.

[0046] In one embodiment of the present invention, in step S4, the number of construction units is 3, that is, the formwork installation, concrete pouring and curing processes are completed simultaneously for every 3 layers of frame columns and beams.

[0047] In one embodiment of the present invention, the top support 7 is an adjustable top support, which can be rotated to adjust the height so that the horizontal back side remains horizontal, thus ensuring the flatness of the beam bottom formwork installation.

[0048] The adjustable top support has high height adjustment accuracy and can flexibly compensate for ground settlement or pole installation deviation. Compared with the fixed top support, it greatly reduces the difficulty of beam bottom elevation control, ensures the consistency of multi-layer beam elevation, and avoids quality problems such as uneven beam surface.

[0049] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A method for simultaneous installation of formwork for columns and beams in multi-story concrete frame structures, characterized by: Includes the following steps: Step S1: After the foundation construction is completed, start the formwork installation work for the multi-story concrete frame structure; Step S2: Column formwork system installation: The column formwork system is constructed using square and round buckles, back square buckles, and formwork. The spacing between each component is determined according to the load calculation. First, the formwork is processed according to the column width and height dimensions, and then the formwork is installed. Square steel is selected for back square buckles and fixed to the outside of the formwork. Finally, square and round buckles are installed for reinforcement. The first square and round buckle of each layer is 20-30cm away from the bottom of the column. Step S3: Installation of the frame beam formwork system: The frame beam formwork system is constructed using disc-lock scaffolding, back supports, and formwork. The spacing between each component is determined based on load calculations. First, vertical uprights are installed on both sides of the beam. Uprights are arranged along the longitudinal direction of the beam at the load-calculated spacing, and the horizontal bar spacing is set according to the load calculations. Tripods are installed at the vertical upright nodes at the bottom of each beam. The installation direction of the tripods is consistent with or perpendicular to the longitudinal direction of the beam and set inward. Then, the top support, horizontal back supports, and longitudinal back supports are placed on the tripods in sequence. Finally, the bottom formwork of the beam is installed. Step S4: Multi-layer synchronous construction: Treat at least 3 layers of frame columns and beams as a construction unit, and simultaneously complete the installation and reinforcement of column formwork and beam formwork within the unit. After the concrete pouring and curing meet the standards, proceed with the formwork installation work for the next construction unit.

2. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: In step S2, the back square, the transverse back square, and the longitudinal back square are square steel, and the specifications of the back square are 50mm×50mm×3mm.

3. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: In step S3, the spacing of the vertical poles along the longitudinal direction of the beam and the step distance of the horizontal poles are determined by structural mechanics load calculations to ensure the bearing strength of the support system.

4. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: In step S3, the tripod and the vertical pole node are detachably connected and locked in place by fasteners after installation to prevent displacement during construction.

5. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: In step S3, the transverse back side and the longitudinal back side are arranged perpendicular to each other, the longitudinal back side is placed above the transverse back side, the transverse back side is attached to the top support, the longitudinal back side is attached to the transverse back side, and the bottom formwork of the beam is attached to the longitudinal back side for fixation.

6. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: In step S4, the number of construction units is 3, that is, the formwork installation, concrete pouring and curing processes are completed simultaneously for the frame columns and beams of every 3 floors.

7. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: The top support is an adjustable top support. The height can be adjusted by rotation to keep the lateral back side horizontal and ensure the flatness of the beam bottom formwork installation.

8. The method for simultaneous installation of formwork for multi-story concrete frame columns and beams according to claim 1, characterized in that: The bottom formwork of the beam is installed above the longitudinal back square. Tripods are installed on the scaffolding uprights. A top support is installed on one side of the top of the tripod. Two transverse back squares are placed on the top of the top support. The longitudinal back square is installed on the transverse back square.

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