Template quick-release construction method

Abstract

The application relates to a template quick-dismounting construction method, belonging to the technical field of building construction, which applies a socket type steel pipe support, arranges a rear-dismounting support in advance during template support design, inserts an early-dismounting top support at the top end of the rear-dismounting support, and enables the rear-dismounting support and a construction layer horizontal component to jointly bear the dead weight and construction load of a to-be-constructed layer horizontal component, and specifically comprises the following steps: (1) template design and calculation; (2) positioning and line laying; (3) template support erection; (4) wall column steel bar binding, wall column and beam plate template installation; (5) template acceptance; (6) concrete pouring and tamping; (7) stage-by-stage formwork dismounting; and (8) construction layer rear-dismounting support dismounting. The application can realize efficient turnover and repeated use of the template, improve construction efficiency, shorten the construction period, reduce construction cost, reduce material consumption, save resources, and meet the development trend of green and low carbon.

Description

Technical Field

[0001] This invention relates to the field of concrete structure formwork construction, and specifically to a method for quick formwork removal. Background Technology

[0002] With the continuous development of the construction industry, the application of aluminum formwork and prefabricated construction technology in high-rise residential building construction is becoming increasingly widespread. However, the construction of basements and low-rise buildings still mainly relies on traditional wooden formwork construction technology. Traditional wooden formwork construction has problems such as low turnover rate, long time occupied by support materials, and high construction costs, which contradicts the current concept of green and low-carbon construction.

[0003] To promote green and low-carbon construction of concrete structure formwork projects and significantly reduce the cost of formwork materials and the time required for formwork supports, this invention proposes a quick-release formwork construction method. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a quick-dismantling construction method for formwork that enables efficient turnover and reuse of formwork, shortens the occupation time of formwork supports, reduces construction costs, and improves construction efficiency.

[0005] The technical solution adopted by this invention to solve its technical problem is: a quick-release formwork construction method, which uses a socket-type steel pipe support, and pre-arranges a removable support in the formwork support design. The top of the removable support upright is inserted with an early-removal top support. The removable support and the horizontal components of the construction layer can jointly bear the self-weight of the horizontal components of the layer to be constructed (the upper layer) and the construction load. Specifically, it includes the following steps: (1) Design and calculation of formwork: including the calculation and arrangement of formwork support, the calculation and arrangement of post-removal support, etc., calculate and determine the longitudinal and transverse spacing of the formwork support uprights, calculate the number of post-removal support uprights required when the concrete of the horizontal component of the construction layer reaches the preset (e.g., 75%) design strength and together with the post-removal support bears the self-weight of the horizontal structure of the layer to be constructed (the upper layer) and the construction load, and design and arrange the post-removal support to ensure the stability and bearing capacity of the formwork support, and at the same time ensure that the post-removal support and the horizontal component together bear the self-weight load of the structure of the layer to be constructed (the upper layer) and the construction load; (2) Positioning and layout: Based on the control lines, mark the center line of the beam, the edge line of the column, and the control lines; (3) Erection of formwork support: Erect formwork support according to the formwork design drawings and positioning and layout results. The formwork support adopts socket-type steel pipe support. The post-removal support is arranged in the formwork support in advance, and the early removal support is set at the top of the post-removal support uprights to ensure that the arrangement of the support uprights, support horizontals and support diagonals meets the design requirements. (4) Binding of wall and column reinforcement and installation of wall, column and beam and slab formwork: After the formwork support is erected, the wall and column reinforcement is bound and the wall and column formwork is installed. Then the beam and slab formwork is installed to ensure that the formwork meets the design requirements. (5) Template acceptance: After the template installation is completed, a comprehensive template acceptance shall be carried out, including the template size, position, stability, etc., to ensure that the template installation quality meets the design requirements; and to check whether the template support is erected according to the design requirements. (6) Concrete pouring: Concrete pouring should ensure that the concrete is dense and free of voids and should be cured in a timely manner; (7) Staged formwork removal: After the concrete of the horizontal components of the construction layer has reached a certain strength, the formwork shall be removed in stages according to the design requirements and construction specifications. (8) Removal of post-construction support: When the concrete of the horizontal members of the construction layer meets the demolding conditions, that is, the concrete meets the strength required by the specification and can independently support the load transmitted from the upper layer, the post-construction support shall be removed.

[0006] Further, in step (1), the longitudinal and transverse spacing of the template support uprights is calculated and determined: Based on the beam and slab cross-sectional dimensions in the structural design drawings and the live load, decoration and masonry load, and construction load that the beams and slabs can withstand as described in the specifications, perform stress calculations and design of the formwork support uprights, and determine the design longitudinal and transverse spacing of the formwork support uprights. The arrangement of formwork supports should be based on the design longitudinal and transverse spacing, combined with the structural form and construction needs, with continuous arrangement as the principle. Taking into account the position of beams and columns, the longitudinal and transverse spacing of the formwork support uprights should not be greater than the design longitudinal and transverse spacing.

[0007] Further, in step (1), the number of post-removal support columns required to jointly bear the self-weight and construction load of the horizontal structure of the layer to be constructed (the layer above) when the concrete of the horizontal members of the construction layer reaches the preset (e.g., 75%) design strength, together with the post-removal support, is calculated, and the post-removal support is designed and arranged: Calculate the ultimate load Q of a single upright of the scaffold after dismantling. n ; Calculate the external load Q that the horizontal members of the construction layer can withstand when they reach the preset (e.g., 75%) design strength. wn ; Calculate the horizontal structural self-weight load Q of the layer to be constructed (the layer above). tn+1 With construction load Q sn+1 ; Calculate the total load Q of the layer to be constructed (the layer above). jmn+1 =Q tn+1 +Q sn+1 ; Calculate the number of uprights n after dismantling the support frame, n = roundup((Q jmn+1 -Q wn ) / Q n ,0); Based on the minimum number of post-dismantling scaffolding uprights required by calculation, combined with the design spacing of the formwork scaffolding uprights, considering safety and construction needs, the post-dismantling scaffolding is arranged according to the principles of mid-span arrangement and balanced arrangement, with the number of post-dismantling scaffolding uprights n'>n.

[0008] Furthermore, in step (7), when the concrete strength of the horizontal members of the construction layer reaches 50% of the design strength, the early-stripping formwork and all the ribs are removed so that they can be quickly transferred to the next construction section; when the concrete strength of the horizontal members of the construction layer is further enhanced to 75% of the design strength, the horizontal members of the construction layer and the post-stripping supports can jointly bear the construction load of the layer to be constructed and the self-weight load of the horizontal structure. At this time, all formwork and supports except the post-stripping supports can be removed and transferred, further shortening the occupation time of the formwork and supports.

[0009] Furthermore, the formwork for the horizontal structural members of the construction layer is removed early when the concrete reaches 50% of the design strength. Generally, 2-3 days after pouring, the test report of the formwork removal test block under the same conditions is checked and a rebound test is conducted on site. According to the formwork design, the crossbars of the material transport channel are removed to facilitate the entry and exit of personnel and materials. The tray of the early removal top support is lowered, all the ribs are removed, the middle early removal formwork is removed, and it is transported out through the material transport channel for the next turnover.

[0010] Furthermore, after the concrete of the horizontal components of the construction layer meets 75% of the design strength, generally 7 to 10 days after pouring, check the test report of the demolding test block under the same conditions and conduct on-site rebound; mark the post-removal support, check whether the vertical diagonal bracing of the post-removal support is continuously set, whether the pins are knocked upright, and whether the diagonal rods are loose; start dismantling the support from the entrance, and dismantle all the supports except the post-removal support, and clean up and transport the materials out in a timely manner while dismantling.

[0011] Furthermore, in step (8), the rear dismantling support is dismantled gradually from top to bottom, with the operator standing inside the rear dismantling support; safety protective equipment is used correctly, and measures are taken to prevent the frame from overturning when necessary; the dismantled uprights, crossbars and components are strictly prohibited from being thrown and are passed manually.

[0012] Technical principle of the invention: (1) Introduce early removal top support technology, i.e. early removal device, to improve the turnover efficiency and service life of the template; (2) When designing the formwork, not only should the formwork support bear the self-weight load and construction load of the structure of this floor, but also the concrete of the horizontal structure of this floor should bear the self-weight load and construction load of the upper floor together with the later-removed support when it reaches 75% of the design strength; the arrangement of the later-removed support should be considered in the overall arrangement of the formwork support. (3) Adopt a phased formwork removal strategy to improve construction efficiency while ensuring safety during construction; (4) Pay attention to the setting and dismantling process of the post-dismantling bracket to ensure the safety and stability of the entire construction process.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By introducing early formwork removal technology and a phased formwork removal strategy, this invention achieves efficient formwork turnover and reuse, improving construction efficiency, shortening the construction period, reducing construction costs, minimizing material consumption, and conserving resources, aligning with the green and low-carbon development trend. It also promotes the use of green and efficient formwork and support materials, improving construction quality; eliminates blind formwork removal, reducing quality problems and extending the lifespan of buildings. Simultaneously, through precise calculations and design, the stability and load-bearing capacity of the formwork support are guaranteed, ensuring construction safety, reducing construction accidents, and protecting the lives of construction workers. Furthermore, the construction method of this invention has advantages such as wide applicability, simple operation, and material saving, which is of great significance for promoting the green and low-carbon development of the construction industry. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the planar arrangement of the template support of the present invention; Figure 2 This is a schematic diagram of the template planar layout of the present invention; Figure 3 This is a cross-sectional view of the present invention after demolding at 50% of its design strength. Figure 4 A schematic diagram of the cross-section of the bracket after it has been disassembled, retaining 75% of the design strength of this invention; Figure 5 A schematic diagram of the disassembled bracket after retaining 75% of the design strength of this invention; Explanation of reference numerals in the attached drawings: 1. Removable support; 2. Support upright; 3. Structural beam; 4. Structural slab; 5. Material transport channel; 6. Early removal formwork; 7. Removable formwork; 10. Early removal top support; 11. Double support beam; 12. Main rib; 13. Secondary rib; 14. Support crossbar; 15. Structural column; 16. Support diagonal brace; 17. Support layer; 18. Construction layer; 19. Layer to be constructed. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] This explanation uses the rapid dismantling of wooden formwork in a hospital's medical complex as an example, and includes the following steps: (1) Design and calculation of formwork: including the calculation and arrangement of formwork support, the calculation and arrangement of post-removal support, etc., calculate and determine the longitudinal and transverse spacing of the formwork support uprights, calculate the number of post-removal support uprights required when the concrete of the horizontal component of the construction layer reaches 75% of the design strength and together with the post-removal support bears the self-weight of the horizontal structure of the layer to be constructed (the upper layer) and the construction load, and design and arrange the post-removal support to ensure the stability and bearing capacity of the formwork support, and at the same time ensure that the post-removal support and the horizontal component together bear the self-weight load of the structure of the layer to be constructed (the upper layer) and the construction load; ① Calculate and determine the longitudinal and transverse spacing of the formwork support uprights: Based on the beam and slab cross-sectional dimensions in the structural design drawings and the live load, decoration and masonry load, and construction load that the beams and slabs can withstand as described in the specifications, the stress calculation and design of the formwork support uprights are carried out. The design longitudinal and transverse spacing of the formwork support uprights is determined to be 1200mm and 1500mm, respectively; the step distance of the formwork support crossbars is determined to be 1500mm and 1000mm. The design of the formwork support is based on the longitudinal and transverse spacing of the design, combined with the structural form and construction needs. The principle of continuous arrangement is taken into account the position of beams and columns. The longitudinal and transverse spacing of the formwork support uprights shall not be greater than the design longitudinal and transverse spacing. Specifically, the longitudinal spacing is 1200mm and the transverse spacing is 1500mm (material transport channel) and 1200mm. ② Calculate the number of post-removal scaffold uprights required to jointly bear the self-weight and construction load of the horizontal structural members of the construction layer (the layer above) when the concrete of the horizontal members reaches 75% of the design strength, and design the layout of the post-removal scaffolds: Calculate the ultimate load Q of a single upright of the scaffold after dismantling. n Q n =38.6KN; Calculate the external load Q that the horizontal members of the construction layer can withstand when they reach 75% of their design strength. wn Q wn =296.62KN; Calculate the horizontal structural self-weight load Q of the layer to be constructed (the layer above). tn+1 With construction load Q sn+1 Q tn+1 =410.16KN, Q sn+1 =510.18KN; Calculate the total load Q of the layer to be constructed (the layer above). jmn+1 =Q tn+1 +Q sn+1 Q jmn+1 =920.34KN; Calculate the number of uprights n after dismantling the support, n=roundup((Q jmn+1 -Q wn ) / Q n (0), n=16; Based on the minimum number of post-removal scaffolding uprights required by calculation, combined with the design spacing of the formwork scaffolding uprights, considering safety and construction needs, the post-removal scaffolding is arranged according to the principles of mid-span arrangement and balanced arrangement, and n'=18 is taken to arrange the post-removal scaffolding. Construction requirements for post-removal supports: Post-removal supports are part of the formwork support and are the load-bearing support after the other supports and formwork are removed when the horizontal components reach 75% of the design strength. Vertical scissor bracing or diagonal bracing must be continuously installed around the perimeter of the post-removal supports, and the vertical scissor bracing or diagonal bracing installed therein must not be any connection with the members other than the post-removal supports. (2) Positioning and layout: Based on the control lines, mark the center line of the beam, the edge line of the column, and the two perpendicular axes of the formwork support uprights. (3) Formwork support erection: Erect formwork supports according to the formwork design drawings and positioning layout results. The formwork supports adopt socket-type steel pipe supports. The supports are pre-arranged in the formwork supports and early dismantling supports are set at the top of all formwork support uprights to ensure that the arrangement of support uprights, support horizontals and support diagonals meets the design requirements and ensures the stability and load-bearing capacity of the supports. The post-removal supports are arranged according to the principles of mid-span and balanced arrangement. A set of post-removal supports consisting of 6 support columns is arranged at the mid-span and center positions on all four sides. Early removal supports are set at the top of the post-removal support columns (such as "An early removal component and early removal formwork support for a concrete forming formwork" (ZL201810942374.3) and "An improved early removal component and early removal formwork support for a concrete forming formwork" (ZL202120493421.8)). The schematic diagram of the plan layout of the formwork support uprights is shown below. Figure 1 As shown in the figure, the positions and arrangements of the rear dismantling support 1, support uprights 2, structural beams 3, material conveying channels 5, support crossbars 14, and structural columns 15 are marked. (4) Binding of wall and column reinforcement and installation of wall, column and beam and slab formwork: After the formwork support is erected, the wall and column reinforcement is bound and the wall and column formwork is installed. Then the beam and slab formwork is installed to ensure that the formwork is installed flat, without warping or misalignment, and the joints are tight to meet the design requirements. The template layout diagram is shown below. Figure 2 As shown in the figure, the positions and arrangements of structural beam 3, structural column 15, post-removal formwork 6 and early-removal formwork 7 are marked: early-removal top supports are installed on the top of the uprights, post-removal formwork is arranged on the early-removal top plate, and early-removal formwork is arranged between the two post-removal formworks. (5) Template acceptance: After the template installation is completed, a comprehensive template acceptance shall be carried out, including the template size, position, stability, etc., to ensure that the template installation quality meets the design requirements; in addition to checking whether the template support is erected according to the design requirements; (6) Concrete pouring: The principle of pouring concrete for beams and slabs should be to ensure continuous pouring from one end, pouring the higher beams in layers, keeping the cement slurry wrapped around the stones along the bottom of the beam and moving forward, while using small-diameter stones at the joints and vibrating them fully to ensure that the concrete is dense and free of voids, and curing it in time after pouring. (7) Staged formwork removal: After the concrete of the horizontal members of the construction layer reaches a certain strength, the formwork is removed in stages according to the design requirements and construction specifications. First, when the concrete strength of the horizontal members of the construction layer reaches 50% of the design strength, the early formwork 6 (i.e. the formwork between the two later formwork 7 as shown in the figure) and all the ribs are removed so that they can be quickly transferred to the next construction section. When the concrete strength of the horizontal members of the construction layer further increases to 75% of the design strength, the horizontal members of the construction layer and the later-removed supports jointly bear the load of the horizontal structure of the layer to be constructed. At this time, all formwork and supports except for the later-removed supports can be removed and transferred, further shortening the occupation time of the formwork and supports. Among them, the sectional view after demolding at 50% design strength is shown, for example. Figure 3 As shown in the figure, the positions and relationships of the support pole 2, structural beam 3, structural slab 4, material transport channel 5, early stripping top support 10, double support beam 11, support layer 17, and construction layer 18 are marked. Among them, the cross-sectional diagram of the bracket after 75% design strength retention is shown, as follows: Figure 4 As shown in the figure, the positions and relationships of the support layer 17, the construction layer 18, and the layer to be constructed 19 are marked. The diagram shows the plan of removing the support after the concrete of the construction layer reaches 75% of its design strength. Figure 5 As shown in the figure, the positions and arrangement of the rear-dismantling bracket 1, bracket upright 2, structural beam 3, and bracket crossbar 14 are marked. (8) Removal of post-construction support: When the concrete of the horizontal members of the construction layer meets the demolding conditions, that is, the concrete meets the design strength required by the specification and can independently support the load transmitted from the upper layer, the post-construction support shall be removed.

[0017] In step (7), the formwork is removed early when the concrete of the horizontal members of the construction layer meets 50% of the design strength. Generally, 2 to 3 days after pouring, the test report of the demolding test block under the same conditions is checked and the rebound test is carried out on site. According to the formwork design, the crossbar of the material transport channel is removed to facilitate the entry and exit of personnel and materials. The tray of the early demolding top support is lowered, all the ribs are removed, the middle early demolding formwork is removed, and it is transported out through the material transport channel to enter the next turnover.

[0018] In step (7), after the concrete of the horizontal members of the construction layer meets 75% of the design strength, it is generally 7 to 10 days after pouring. Check the test report of the demolding test block under the same conditions and perform on-site rebound; mark the post-removal support, check whether the vertical diagonal bracing of the post-removal support is continuously set, whether the pin is knocked upright, and whether the diagonal bar is loose; start dismantling the support from the entrance, dismantle all the supports except the post-removal support, and clean up and transport the materials out in time while dismantling.

[0019] In step (8), the rear dismantling support is dismantled step by step from top to bottom. The operator stands inside the rear dismantling support to operate; safety protection equipment is used correctly, and measures are taken to prevent the frame from overturning when necessary; the dismantled uprights, crossbars and components must not be thrown, and are passed down manually.

[0020] Benefit Analysis 1. A comparative analysis of the turnover time of formwork materials for concrete at 100% design strength under normal temperature is presented in Table 1.

[0021] Table 1 As shown in Table 1, the turnover efficiency of early formwork removal and conventional formwork support materials is: 2.14 times that of formwork, 3 times that of primary and secondary ribs, and 1.69 times that of formwork support.

[0022] Under normal circumstances, the concrete of the beams and slabs on this floor often reaches 100% of its design strength. However, since the design bearing capacity of the beams and slabs cannot withstand the combined self-weight load and construction load of the beams and slabs on the upper floor, the formwork support frame below this floor can often only be removed after the concrete of the upper floor beams and slabs has been poured. The quick-release wooden formwork construction method allows the 20% to 30% of the support frame to be retained, which can then share the construction load and structural self-weight load of the upper floor with the horizontal structural components.

[0023] 2.1 Comparative analysis of the economic benefits of early formwork removal and conventional formwork support for a building area of ​​10,000 m². The specific results are shown in Table 2.

[0024] Table 2 Note: This calculation is based on a total building area of ​​10,000 m², a floor height of 6.6 m, and a formwork unfolding coefficient of 2.2.

[0025] The building area of ​​the elevated floor and podium of this project is 80,000 m². The rental cost of conventional formwork and support materials would be 2.8 million yuan, while the cost of using quick-release wooden formwork is 1.12 million yuan, resulting in a cost saving of 1.68 million yuan.

[0026] The quick-release method of wooden formwork construction greatly improves the turnover efficiency, thus significantly reducing the amount of materials used. Considering factors such as material transportation costs, material cleaning costs, and the fact that conventional formwork cannot be rotated according to theoretical values ​​due to schedule reasons, the economic benefits of quick-release wooden formwork are often greater.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for quick-release formwork construction, characterized in that: The application of socket-type steel pipe supports involves pre-arranging removable supports during the formwork support design. The top of the removable support uprights is connected to early-removal top supports. The removable supports and the horizontal components of the construction layer can jointly bear the self-weight of the horizontal components of the layer to be constructed and the construction load. The specific steps include: (1) Design and calculation of formwork: including the calculation and arrangement of formwork support, the calculation and arrangement of post-removal support, the calculation to determine the longitudinal and transverse spacing of the formwork support uprights, the calculation of the number of post-removal support uprights required when the concrete of the horizontal component of the construction layer reaches the preset design strength and together with the post-removal support bears the self-weight of the horizontal structure of the layer to be constructed and the construction load, and the design and arrangement of post-removal support to ensure the stability and bearing capacity of the formwork support, and at the same time ensure that the post-removal support and the horizontal component together bear the self-weight load of the upper layer structure and the construction load; (2) Positioning and layout: Based on the control lines, mark the center line of the beam, the edge line of the column, and the control lines; (3) Erection of formwork support: Erect formwork support according to the formwork design drawings and positioning and layout results. The formwork support adopts socket-type steel pipe support. The post-removal support is arranged in the formwork support in advance, and the early removal support is set at the top of the post-removal support uprights to ensure that the arrangement of the support uprights, support horizontals and support diagonals meets the design requirements. (4) Binding of wall and column reinforcement and installation of wall, column and beam and slab formwork: After the formwork support is erected, the wall and column reinforcement is bound and the wall and column formwork is installed. Then the beam and slab formwork is installed to ensure that the formwork meets the design requirements. (5) Template acceptance: After the template installation is completed, a comprehensive template acceptance shall be carried out, including the size, position and stability of the template, to ensure that the template installation quality meets the design requirements; and to check whether the template support is erected according to the design requirements. (6) Concrete pouring: Concrete pouring should ensure that the concrete is dense and free of voids and should be cured in a timely manner; (7) Staged formwork removal: After the concrete has reached a certain strength, the formwork shall be removed in stages according to the design requirements and construction specifications. (8) Removal of post-construction support: When the concrete of the horizontal members of the construction layer meets the demolding conditions, that is, the concrete meets the strength required by the specification and can independently support the load transmitted from the upper layer, the post-construction support shall be removed. In step (1), the number of post-removal support columns required to jointly bear the self-weight of the horizontal structure of the construction layer and the construction load when the concrete of the horizontal members of the construction layer reaches the preset design strength, together with the post-removal supports, is calculated, and the post-removal supports are designed and arranged: Calculate the ultimate load Q of a single upright of the scaffold after dismantling. n ; Calculate the external load Q that the horizontal members of the construction layer can withstand when they reach the preset design strength. wn ; Calculate the horizontal structural self-weight load Q of the layer to be constructed. tn+1 With construction load Q sn+1 ; Calculate the total load Q of the layer to be constructed. jmn+1 =Q tn+1 +Q sn+1 ; Calculate the number of uprights n after dismantling the support frame, n = roundup((Q jmn+1 -Q wn ) / Q n ,0); Based on the minimum number of post-removal scaffolding uprights required by calculation, combined with the design spacing of the formwork scaffolding uprights, considering safety and construction needs, the post-removal scaffolding is arranged according to the principles of mid-span arrangement and balanced arrangement, with the number of post-removal scaffolding uprights n'>n. Construction requirements for post-removal supports: Post-removal supports are part of the formwork support and are the load-bearing support after the other supports and formwork are removed when the horizontal components reach 75% of the design strength. Vertical scissor bracing or diagonal bracing must be continuously installed around the perimeter of the post-removal supports, and the vertical scissor bracing or diagonal bracing installed therein must not be any connection with the members other than the post-removal supports. In step (7), when the concrete strength of the horizontal members of the construction layer reaches 50% of the design strength, the early-stripping formwork and all the ribs are removed so that they can be quickly transferred to the next construction section. When the concrete strength of the horizontal members of the construction layer is further enhanced to 75% of the design strength, the horizontal members of the construction layer and the post-stripping supports can jointly bear the construction load of the layer to be constructed and the self-weight load of the horizontal structure. At this time, all formwork and supports except the post-stripping supports can be removed and transferred, further shortening the occupation time of the formwork and supports.

2. The quick-release formwork construction method according to claim 1, characterized in that: In step (1), the longitudinal and transverse spacing of the template support uprights is calculated and determined: Based on the beam and slab cross-sectional dimensions in the structural design drawings and the live load, decoration and masonry load, and construction load that the beams and slabs can withstand as described in the specifications, perform stress calculations and design of the formwork support uprights, and determine the design longitudinal and transverse spacing of the formwork support uprights. The arrangement of formwork supports should be based on the design longitudinal and transverse spacing, combined with the structural form and construction needs, with continuous arrangement as the principle. Taking into account the position of beams and columns, the longitudinal and transverse spacing of the formwork support uprights should not be greater than the design longitudinal and transverse spacing.

3. The quick-release formwork construction method according to claim 1 or 2, characterized in that: For the construction layer, the formwork should be removed early when the concrete of the horizontal components meets 50% of the design strength. Two to three days after pouring, check the test report of the demolding test block under the same conditions and conduct on-site rebound testing. According to the formwork design, remove the crossbars of the material transport channel to facilitate the entry and exit of personnel and materials. Lower the tray of the early demolding top support, remove all the ribs, remove the middle early demolding formwork, and transport it out through the material transport channel for the next turnover.

4. The quick-release formwork construction method according to claim 1 or 2, characterized in that: After the concrete of the horizontal components of the construction layer meets 75% of the design strength, 7-10 days after pouring, check the test report of the demolding test block under the same conditions and conduct on-site rebound; mark the post-removal support, check whether the vertical diagonal bracing of the post-removal support is continuously set, whether the pins are knocked upright, and whether the diagonal rods are loose; start dismantling the support from the entrance, and dismantle all the supports except the post-removal support, and clean up and transport the materials out in a timely manner while dismantling.

5. The quick-release formwork construction method according to claim 1 or 2, characterized in that: In step (8), the rear dismantling support is dismantled step by step from top to bottom, and the operator stands inside the rear dismantling support; safety protection equipment is used correctly and measures are taken to prevent the frame from overturning; the dismantled uprights, crossbars and components must not be thrown, and are passed manually.

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