Parallel double-step stair climbing formwork and stair construction method
By designing the frame structure and formwork components of the parallel double-flight staircase climbing formwork, the cyclic climbing of the formwork was realized, solving the problems of high resource consumption and safety hazards, and improving the construction efficiency and safety of super high-rise buildings.
Patent Information
- Application Number
- CN202511872125.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-02-24
AI Technical Summary
Existing staircase construction techniques are resource-intensive, pose safety hazards, and have low construction efficiency, making them unsuitable for the rapid construction requirements of super high-rise buildings.
The parallel double-flight staircase climbing formwork system includes a frame structure, upper formwork assembly, and lower formwork assembly. The formwork is cyclically climbed through the frame track assembly, reducing scaffolding investment, improving construction efficiency, and eliminating the risk of slippage by using diagonal bracing to distribute the horizontal load.
It significantly reduced scaffolding investment and labor consumption, lowered construction costs, improved construction efficiency, shortened the construction period, and enhanced safety.
Smart Images
Figure CN121556672A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building construction technology, and in particular to a parallel double-flight staircase climbing formwork and a staircase construction method. Background Technology
[0002] In the construction of stair structures in super high-rise buildings (over 100 meters in height), traditional techniques typically use steel pipe scaffolding or disc-lock scaffolding as the formwork support system. The standard operating procedure can be summarized into six main steps: First, erect scaffolding to support the stair formwork; then lay the bottom and side formwork of the staircase; next, carry out the rebar tying operation; after completion, pour concrete; after the concrete reaches the demolding strength, remove the formwork and scaffolding in sequence; after each floor is completed, repeat the above process until the entire stair structure is completed.
[0003] In practical engineering applications, this technology has gradually revealed the following core defects: First, resource consumption is a significant issue. Because the scaffolding system needs to be re-erected and dismantled for each floor of the staircase, materials such as formwork and steel pipes are repeatedly disassembled and transported. This not only limits the number of times materials can be turned over and increases the loss rate, but also results in a huge amount of on-site labor input, leading to high labor costs and poor overall construction economics.
[0004] Secondly, there are significant safety hazards. Staircases are typically arranged at an angle, and the scaffolding erected on them is prone to overall or partial slippage under construction loads due to uneven load distribution or loose fasteners, affecting the stability of the support system. Furthermore, the installation and dismantling of formwork at heights is difficult, posing a high risk of falls for construction workers and creating significant safety management challenges.
[0005] Third, the overall construction efficiency is low. In each floor's construction cycle, the time spent on auxiliary processes such as scaffolding erection and adjustment, as well as formwork installation and dismantling, is too high. This severely squeezes the working time of core processes such as rebar tying and concrete pouring, restricting the overall construction progress and making it difficult to meet the requirements of rapid construction of current super high-rise buildings.
[0006] Therefore, there is an urgent need for an integrated, cyclically climbing template to solve the above-mentioned technical problems. Summary of the Invention
[0007] The main objective of this invention is to provide a parallel double-flight staircase climbing formwork and a staircase construction method, aiming to solve the technical problems of existing staircase construction processes, such as high resource consumption, safety hazards, and low construction efficiency.
[0008] To achieve the above objectives, the present invention proposes a parallel double-flight stair climbing formwork, comprising a frame mechanism, an upper formwork assembly, and a lower formwork assembly. The frame mechanism includes an installation frame assembly, a frame rail assembly, and a formwork rail assembly. The installation frame assembly is disposed within the stairwell of the double-flight staircase, and the frame rail assembly is fixed to the side of the installation frame assembly. The installation frame assembly is vertically slidably mounted on the stair beam via the frame rail assembly. The formwork rail assembly is fixed to the front and back of the installation frame assembly, and the upper and lower formwork assemblies are slidably mounted on the formwork rail assembly, with the upper formwork assembly located above the lower formwork assembly.
[0009] A further improvement of the parallel double-flight stair climbing template of the present invention is that the mounting frame assembly includes two vertical lattice columns, multiple horizontal lattice beams, and multiple diagonal tie rods; the two vertical lattice columns are vertically and slidably installed on the side beams of the stairwell of the double-flight staircase; the multiple horizontal lattice beams are fixed at intervals between the two vertical lattice columns, and the multiple diagonal tie rods are obliquely fixed between the two vertical lattice columns; the frame track assembly is fixed to the side of the vertical lattice columns, and the template track assembly is fixed to the front and back of the vertical lattice columns.
[0010] The parallel double-flight stair climbing formwork of the present invention is further improved in that the number of the upper formwork components is two, which are slidably installed on the front and back of the vertical lattice column respectively; the number of the lower formwork components is four, with two of the lower formwork components installed on the front and back of the vertical lattice column respectively.
[0011] A further improvement of the parallel double-flight stair climbing template of the present invention is that the frame mechanism also includes a fixed support for detachably installed on the stair beams embedded in the stairwell of the double-flight staircase, and the vertical lattice column is slidably installed on the fixed support through the frame track assembly.
[0012] A further improvement of the parallel double-flight stair climbing formwork of the present invention is that the upper formwork assembly includes an upper formwork beam, side formwork and multiple treads. The upper formwork beam is slidably installed on the formwork track assembly, the side formwork is installed on the upper formwork beam, and the multiple treads are installed at intervals on the side formwork.
[0013] A further improvement of the parallel double-flight stair climbing formwork of the present invention is that the lower formwork assembly includes a lower formwork beam, a bottom formwork, and multiple cantilever beams. The lower formwork beam is slidably installed on the formwork track assembly and located below the upper formwork beam. The bottom formwork is fixed to the lower formwork beam. The multiple cantilever beams are fixed at intervals to the lower formwork beam, and the cantilever beams are located below the bottom formwork to support the bottom formwork.
[0014] A further improvement of the parallel double-flight stair climbing formwork of the present invention is that both ends of the upper formwork beam and the lower formwork beam are provided with sliding supports that are slidably installed on the formwork track assembly.
[0015] In addition, the present invention also provides a stair construction method using the parallel double-flight stair climbing formwork as described above, comprising the following steps: S1. Steel pipe scaffolding is used to support the casting of the main structure and stairs of floors 1 to 3. Bolts are pre-embedded on the stair beams (A) in the stairwell (C) of the double-flight staircase. Fixed supports (11) of the stairwell (C) of floors i to i+2 are installed. The frame mechanism (1) is installed on the fixed supports (11) through the frame track assembly (13). S2. Install the upper template assembly (2) and lower template assembly (3) of the i+2~i+3 floors on the template track assembly (15) on the front and back of the frame mechanism (1) through sliding supports (21); i is a natural number greater than or equal to 1 and less than or equal to N, and N is the total number of floors of the parallel double-flight staircase. S3, raise the template component (2) of layer i+2 to i+3 to the specified elevation of the previous layer; S4. Tie and fix the stair reinforcement (B) on the formwork assembly (3) of the i+2~i+3 floors. S5. Carry the stair reinforcement (B) up to the specified elevation of the lower formwork assembly (3) of the i+2~i+3 floors, so that the upper formwork assembly (2) and the lower formwork assembly (3) form a complete casting formwork system. S6. Pour concrete for the i+2~i+3 floor staircases, and pre-embed bolts on the stair beams (A) of the stairwell (C) of the double-flight staircase, and then carry out concrete curing. S7. The frame structure (1) is lifted one floor, which drives the upper formwork assembly (2) to be lifted one floor as a whole, but the lower formwork assembly (3) remains at the bottom of the concrete of the i+2~i+3 floor staircase. S8. Install another set of lower formwork components (3) above the newly poured i+2~i+3 floor stair concrete. This unit is the lower formwork component (3) for i+3~i+4 floor. Tie steel bars on the lower formwork component (3) for i+3~i+4 floor. S9. Slide the lower template component (3) of the i+3~i+4 layer to make the upper template unit and the lower template unit of the i+3~i+4 layer form a complete casting template system; S10. Pour concrete for the i+3 to i+4 floor staircases, and pre-embed bolts on the stair beam (A) of the stairwell (C) of the double-flight staircase, and then carry out concrete curing. S11. Lower the lower formwork assembly (3) of the i+2~i+3 floors to the upper part of the stairs of the i+1~i+2 floors, and the construction workers remove the lower formwork unit of the i+2~i+3 floors on the stairs of the i+1~i+2 floors. S12. If i is greater than N, the construction of the parallel double-flight staircase is completed, and the entire parallel double-flight staircase climbing formwork is removed; otherwise, take i = i + 1 and return to S7.
[0016] The technical solution of the present invention has the following beneficial effects: The parallel double-flight staircase climbing formwork of this invention achieves cyclical climbing through a continuously climbing frame mechanism, upper formwork assembly, and lower formwork assembly, which can reduce scaffolding input in stairwells by 80%, reduce labor consumption by 60%, and significantly save construction costs. Since the upper staircases do not require the erection and dismantling of scaffolding, construction efficiency is improved, and the overall construction period of super high-rise buildings can be reduced by more than 15%. The frame mechanism is a triangular truss structure, with diagonal tie rods sharing the horizontal load, completely eliminating the risk of slippage of traditional steel pipe scaffolding. It solves the technical problems of existing staircase construction processes, such as high resource consumption, safety hazards, and low construction efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a first-view structural schematic diagram of the parallel double-flight stair climbing template of the present invention; Figure 2 This is a second-view structural schematic diagram of the parallel double-flight stair climbing template of the present invention; Figure 3 This is a schematic diagram of the installation of the parallel double-flight stair climbing template of the present invention; Figure 4 This is a schematic diagram of the installation of the upper and lower template beams of the parallel double-flight stair climbing template of the present invention. Figure 5 This is a schematic diagram of the installation of the side formwork of the parallel double-flight stair climbing formwork of the present invention; Figure 6 This is a schematic diagram of the installation of the treads and side formwork of the parallel double-flight stair climbing formwork of the present invention; Figure 7 This is a schematic diagram of the installation of the upper and lower template components of the parallel double-flight stair climbing template of the present invention; Figure 8This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 2 ; Figure 10 This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 3 ; Figure 11 This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 4 ; Figure 12 This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 5 ; Figure 13 This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 6 ; Figure 14 This is a schematic diagram of the stair construction method using the parallel double-flight stair climbing formwork of the present invention. Figure 7 ; Figure 15 This is a front view of the installation of the frame track assembly and fixed support of the parallel double-flight stair climbing template of the present invention. Figure 16 This is a schematic diagram of the back of the installation of the frame track assembly and fixed support of the parallel double-flight stair climbing template of the present invention. Figure 17 The exploded view shows the installation of the frame track assembly and fixed support of the parallel double-flight stair climbing template of the present invention.
[0019] Explanation of icon numbers: A. Stair beam, B. Staircase reinforcement, C. Stairwell; 1. Frame structure; 11. Fixed support; 12. Mounting frame assembly; 121. Vertical lattice column; 122. Horizontal lattice beam; 13. Frame track assembly; 1301. Sliding track; 1302. Roller; 1303. Rack; 1304. Transmission gear; 1305. Motor; 1306. Connecting plate; 1307. Limiting cover; 1308. Roller groove; 14. Diagonal tie rod; 15. Template track assembly; 2. Add template components; 21. Sliding support; 22. Upper formwork beam; 23. Side formwork; 24. Step board; 3. Download template components; 31. Lower formwork beam, 32. Cantilever beam, 33. Bottom formwork. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0024] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
[0025] like Figures 1-14As shown, the present invention proposes a parallel double-flight stair climbing formwork, including a frame mechanism 1, an upper formwork assembly 2, and a lower formwork assembly 3; the frame mechanism 1 includes an installation frame assembly 12, a frame rail assembly 13, and a formwork rail assembly 15. The installation frame assembly 12 is disposed in the stairwell C of the double-flight staircase, and the frame rail assembly 13 is fixed to the side of the installation frame assembly 12. The installation frame assembly 12 is vertically slidably mounted on the stair beam A through the frame rail assembly 13; the formwork rail assembly 15 is fixed to the front and back of the installation frame assembly 12, and the upper formwork assembly 2 and the lower formwork assembly 3 are slidably mounted on the formwork rail assembly 15, with the upper formwork assembly 2 located above the lower formwork assembly 3.
[0026] The frame track assembly 13 provides an upward sliding track for the installation frame assembly 12, and the template track assembly 15 provides an upward sliding track for the upper template assembly 2. Specifically, the frame track assembly 13 includes two sets of first tracks, the number of which is adjusted according to the actual site conditions. The two sets of first tracks are fixed to the sides of the installation frame assembly 12. The template track assembly 15 includes two sets of second tracks, the number of which is adjusted according to the actual site conditions, preferably an even number. The two sets of second tracks are fixed to the front and back of the installation frame assembly 12, respectively, for the upper template assembly 2 and the lower template assembly 3 of the double-flight staircase to slide and install. The parallel double-flight staircase climbing template of the present invention can realize cyclic climbing and turnover, greatly reducing the repeated investment of scaffolding and templates; it eliminates the risk of slippage of inclined steel pipes, improving the safety of high-altitude operations; it simplifies the template assembly and disassembly process, and improves the construction efficiency of super high-rise staircases.
[0027] Preferably, such as Figure 4 As shown, the mounting frame assembly 12 includes two vertical lattice columns 121, multiple horizontal lattice beams 122, and multiple diagonal tie rods 14. The two vertical lattice columns 121 are vertically and slidably mounted on the two side stair beams A of the stairwell C of the double-flight staircase. The multiple horizontal lattice beams 122 are fixed at intervals between the two vertical lattice columns 121, and the multiple diagonal tie rods 14 are diagonally fixed between the two vertical lattice columns 121. The frame track assembly 13 is fixed to the side of the vertical lattice columns 121, and the template track assembly 15 is fixed to the front and back of the vertical lattice columns 121. The mounting frame assembly 12 is the core load-bearing and guiding structure of the entire device. In this embodiment, both the vertical lattice column 121 and the horizontal lattice beam 122 are made of steel sections (such as Q345 hot-rolled steel) welded into a truss structure, and are manufactured in sections (each section is 2-3m long). The sections are connected by double bolts to ensure the assembly rigidity. The diagonal tie rod 14 is made of φ20mm round steel and is arranged at an angle of 45°-60° with the lattice column to form a triangular stable system to share the horizontal load.
[0028] Preferably, such as Figure 8 and Figure 9 As shown, there are two upper formwork components 2, which are slidably installed on the front and back of the vertical lattice column 121, respectively; there are four lower formwork components 3, with two installed on the front and back of the vertical lattice column 121, respectively. The four lower formwork components 3 can be reused, with two used for concrete pouring on the front and back of the current layer, and the other two installed simultaneously on the track to achieve continuous operation.
[0029] Preferably, such as Figure 5 As shown, the frame structure 1 also includes a fixed support 11 for detachably installing on the pre-embedded bolts on the stair beam A within the stairwell C of the double-flight staircase. The vertical lattice column 121 is slidably installed on the fixed support 11 via the frame track assembly 13. In this embodiment, the fixed support 11 is made of 20mm thick steel plate, and the pre-embedded bolts are HRB400 pre-embedded anchors (20mm diameter, 300mm embedded length, 200mm exposed). The fixed support 11 is connected to the stair beam A or platform plate of the building structure through pre-embedded parts. Specifically, as shown... Figures 15-17 As shown in the figure, the structure is for illustrative purposes only, and the specific dimensions can be adjusted according to the needs of the site. The frame track assembly 13 includes a sliding track 1301, a roller 1302, a rack 1303, a transmission gear 1304, a motor 1305, a connecting plate 1306, and a limiting cover 1307. The sliding track 1301 is fixed on the vertical lattice column 121, and the roller 1302 is rotatably mounted on the fixed support 11 through the connecting plate 1306. The outer side of the sliding track 1301 is provided with a roller groove 1308 for the roller 1302 to slide and engage. A rack 1303 is fixed to the inner side of the sliding track 1301. A transmission gear 1304 is rotatably mounted on a fixed support 11. A motor 1305 is fixed to the fixed support 11, and the transmission shaft of the motor 1305 is fixed to the center of the transmission gear 1304, driving the transmission gear 1304 to rotate. The transmission gear 1304 meshes with the rack 1303. A limiting cover 1307 is fixed to a connecting plate 1306 and limits the position to the outside of the roller 1302. In this embodiment, there are two sliding tracks 1301, which are fixed side by side to the vertical lattice column 121. At least two connecting plates 1306 are fixed on each fixed support 11, and each connecting plate 1306 is provided with at least four rollers 1302, which are located on opposite outer sides of the two sliding tracks 1301. When the mounting bracket assembly 12 moves vertically, the motor 1305 drives the transmission gear 1304 to rotate. Since the transmission gear 1304 meshes with the rack 1303, it drives the rack 1303, the sliding track 1301, and the mounting bracket assembly 12 to move upward together. At the same time, the roller 1302 rolls in the roller groove 1308 to limit the vertical movement. When the mounting bracket assembly 12 moves into position, the motor 1305 is turned off.
[0030] Preferably, such as Figure 7 As shown, the upper template assembly 2 includes an upper template beam 22, side templates 23, and multiple step plates 24. The upper template beam 22 is slidably mounted on the template track assembly 15, the side templates 23 are mounted on the upper template beam 22, and the multiple step plates 24 are spaced apart on the side templates 23. In this embodiment, the upper template beam 22 uses hot-rolled steel to ensure the overall rigidity of the upper template unit; the side templates 23 use aluminum alloy templates, which also serve as templates for connecting to the structure; as... Figure 6 As shown, the step tread 24 uses aluminum alloy formwork and is connected to the side formwork 23 via a T-shaped snap-fit structure (it can only be snapped in from above to achieve vertical self-locking and prevent slippage). Furthermore, the step tread 24 can be designed as an inverted L-shape (adding half a step surface), and steel pipe handrails can be installed on the side formwork 23 to form a temporary construction passage between floors, meeting the needs of personnel and small material transportation, and improving the safety of high-altitude operations by 90%.
[0031] Preferably, the lower template assembly 3 includes a lower template beam 31, a bottom template 33, and multiple cantilever beams 32. The lower template beam 31 is slidably installed on the template track assembly 15 and located below the upper template beam 22. The bottom template 33 is fixed to the lower template beam 31, and the multiple cantilever beams 32 are fixed at intervals to the lower template beam 31, with the cantilever beams 32 located below the bottom template 33 to support it. The lower template beam 31 provides support for the multiple cantilever beams 32, and the multiple cantilever beams 32 provide support for the bottom template 33. In this embodiment, the number of cantilever beams 32 is several, made of 10# I-beams, with anti-slip baffles at the ends; the bottom template 33 is made of aluminum alloy and can be integral or spliced depending on actual needs.
[0032] Preferably, such as Figure 4 As shown, both ends of the upper template beam 22 and the lower template beam 31 are provided with sliding supports 21 that are slidably installed on the template track assembly 15. Specifically, the structure of the template track assembly 15 is the same as that of the frame track assembly 13, except that the roller 1302, rack 1303, transmission gear 1304, motor 1305, connecting plate 1306 and limiting cover 1307 are installed on the sliding supports 21 to cooperate with the sliding track 1301 on the vertical lattice column 121. The structural surfaces of the template track assembly 15 and the frame track assembly 13 are chrome-plated for rust prevention to ensure smooth sliding of the sliding track 1301.
[0033] In addition, such as Figures 8-14 As shown, the present invention also provides a stair construction method using the parallel double-flight stair climbing formwork described above, comprising the following steps: S1. Steel pipe scaffolding is used to support the formwork and pour concrete for the main structure and stairs of floors 1 to 3. Bolts are pre-embedded on the stair beams A in the stairwell C of the double-flight staircase, and fixed supports 11 for the stairwell C of floors i to i+2 (floors 1 to 3) are installed. The frame mechanism 1 is installed on the fixed supports 11 through the frame track assembly 13. Specifically, conventional steel pipe scaffolding is used to erect the formwork for the stairs of floors i to i+2 (floors 1 to 3). When constructing the platform slab, HRB400 support anchor bolts are pre-embedded at the joint between the stair beams A and the platform slab as the connection points of the fixed supports 11. The reinforcement binding, concrete pouring and curing of the stairs of floors i to i+2 (floors 1 to 3) are completed according to the traditional process to form the "foundation layer" of the parallel double-flight staircase climbing formwork. During the installation of the frame structure 1, the vertical lattice columns 121 are hoisted to the stairwell C area in sections and spliced into a whole by M24 double bolts. The verticality is controlled by a theodolite (deviation ≤1 / 1000). The diagonal tie rods 14 (φ20mm round steel) are installed to ensure the straightness of the frame track assembly 13 (deviation ≤3mm / m). The fixed support 11 is tightened to the pre-embedded anchor bolts with double nuts.
[0034] S2, such as Figure 8 As shown, upper formwork assembly 2 and lower formwork assembly 3 for i+2 to i+3 (3 to 4 floors) are installed on the formwork track assembly 15 on the front and back of the frame structure 1 via sliding supports 21; i is a natural number greater than or equal to 1 and less than or equal to N, and N is the total number of floors of the parallel double-flight staircase; specifically, when installing the upper formwork assembly 2, the sliding supports 21 are installed and snapped into the formwork track assembly 15, and the reinforcing beams, side formwork 23, and step plates 24 are installed in sequence; when installing the lower formwork assembly 3, the sliding supports 21, beams, cantilever beams 32 and bottom formwork 33 are installed in sequence.
[0035] S3, Raise the template component 2 of the upper i+2~i+3 (3~4 layers) to the specified elevation of the upper layer (synchronization deviation during sliding ≤5mm). S4. Tie and fix the stair reinforcement bars B on the lower formwork assembly 3 of floors i+2 to i+3 (floors 3 to 4); S5. Carry the stair reinforcement B up to the i+2~i+3 (3~4) floor and the lower formwork component 3 to the specified elevation of the upper floor, so that the upper formwork component 2 and the lower formwork component 3 form a complete casting formwork system; connect the upper and lower formwork components 3, the lower formwork component 3 and other formwork in the stairwell (whether wooden or aluminum), and parallel the gap between the double-flight stair climbing formwork and other formwork. S6. Vibrate and pour concrete for the i+2~i+3 (3~4) staircases (using commercial concrete and pouring in layers from bottom to top), and pre-embed bolts on the stair beam A of the stairwell C of the double-flight staircase, and then carry out concrete curing (the concrete can be climbed when the strength reaches 75%~85%, and the strength is tested with a rebound hammer). S7. The frame mechanism 1 is lifted one floor, which drives the upper formwork component 2 to be lifted one floor as a whole, but the lower formwork component 3 remains at the bottom of the concrete of the stairs in the i+2~i+3 floors (3~4 floors); at this time, the upper formwork unit can act as a temporary staircase in the i+3~i+4 floors (4~5 floors); S8, such as Figure 9 As shown, another set of lower formwork components 3 is installed above the newly poured concrete of the stairs on floors i+2 to i+3 (floors 3 to 4). This unit is the lower formwork component 3 for floors i+3 to i+4 (floors 4 to 5), as shown. Figure 10 As shown, reinforcing bars are tied to the lower formwork assembly 3 on floors i+3 to i+4 (floors 4 to 5); S9, such as Figure 11 As shown, the lower formwork component 3 slides up to the i+3~i+4 (4~5) level, so that the upper formwork unit of the i+3~i+4 (4~5) level and the lower formwork unit form a complete casting formwork system; connect the upper and lower formwork components 3, the lower formwork component 3 and other formwork of the stairwell (whether wooden or aluminum formwork), and parallel the gap between the double-flight stair climbing formwork and other formwork. S10, such as Figure 12 As shown, the concrete for the i+3~i+4 (4~5) staircases is vibrated and poured (using commercial concrete and pouring in layers from bottom to top), and bolts are pre-embedded on the stair beam A of the stairwell C of the double-flight staircase. Then the concrete is cured (the concrete strength reaches 75%~85%, and the strength is tested using a rebound hammer). S11, such as Figure 13 As shown, the lower formwork component 3 of floors i+2 to i+3 (floors 3 to 4) is lowered to the upper part of the stairs of floors i+1 to i+2 (floors 2 to 3). Construction workers dismantle the lower formwork units of floors i+2 to i+3 (floors 3 to 4) from the stairs of floors i+1 to i+2 (floors 2 to 3) (construction workers do not need to work at height). After dismantling, as shown... Figure 14 As shown; S12. If i is greater than N, the construction of the parallel double-flight staircase is completed, and the entire parallel double-flight staircase climbing formwork is removed; otherwise, take i = i + 1 and return to S7.
[0036] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A parallel double-flight staircase climbing formwork, characterized in that, The system includes a frame structure (1), an upper template assembly (2), and a lower template assembly (3). The frame structure (1) includes an installation frame assembly (12), a frame rail assembly (13), and a template rail assembly (15). The installation frame assembly (12) is located in the stairwell (C) of the double-flight staircase. The frame rail assembly (13) is fixed to the side of the installation frame assembly (12). The installation frame assembly (12) is vertically slidably installed on the stair beam (A) via the frame rail assembly (13). The template rail assembly (15) is fixed to the front and back of the installation frame assembly (12). The upper template assembly (2) and the lower template assembly (3) are slidably installed on the template rail assembly (15). The upper template assembly (2) is located above the lower template assembly (3).
2. The parallel double-flight stair climbing template according to claim 1, characterized in that, The mounting frame assembly (12) includes two vertical lattice columns (121), multiple horizontal lattice beams (122), and multiple diagonal tie rods (14); the two vertical lattice columns (121) are vertically and slidably installed on the two side stair beams (A) of the stairwell (C) of the double-flight staircase; the multiple horizontal lattice beams (122) are fixed at intervals between the two vertical lattice columns (121), and the multiple diagonal tie rods (14) are diagonally fixed between the two vertical lattice columns (121); the frame track assembly (13) is fixed to the side of the vertical lattice columns (121), and the template track assembly (15) is fixed to the front and back of the vertical lattice columns (121).
3. The parallel double-flight stair climbing formwork according to claim 2, characterized in that, The number of upper template components (2) is two, which are slidably installed on the front and back of the vertical lattice column (121); the number of lower template components (3) is four, with two of the lower template components (3) installed on the front and back of the vertical lattice column (121).
4. The parallel double-flight stair climbing template according to claim 3, characterized in that, The frame structure (1) also includes a fixed support (11) for detachably installing on the pre-embedded bolts on the stair beam (A) in the stairwell (C) of the double-flight staircase, and the vertical lattice column (121) is slidably installed on the fixed support (11) through the frame track assembly (13).
5. The parallel double-flight stair climbing formwork according to claim 4, characterized in that, The upper template assembly (2) includes an upper template beam (22), a side template (23) and multiple step plates (24). The upper template beam (22) is slidably installed on the template track assembly (15), the side template (23) is installed on the upper template beam (22), and the multiple step plates (24) are installed at intervals on the side template (23).
6. The parallel double-flight stair climbing formwork according to claim 5, characterized in that, The lower template assembly (3) includes a lower template beam (31), a bottom template (33), and multiple cantilever beams (32). The lower template beam (31) is slidably installed on the template track assembly (15) and located below the upper template beam (22). The bottom template (33) is fixed on the lower template beam (31). The multiple cantilever beams (32) are fixed at intervals on the lower template beam (31), and the cantilever beams (32) are located below the bottom template (33) to support the bottom template (33).
7. The parallel double-flight stair climbing formwork according to claim 6, characterized in that, Both ends of the upper template beam (22) and the lower template beam (31) are provided with sliding supports (21) that are slidably installed on the template track assembly (15).
8. A staircase construction method using the parallel double-flight staircase climbing formwork as described in claim 7, characterized in that, Includes the following steps: S1. Steel pipe scaffolding is used to support the casting of the main structure and stairs of floors 1 to 3. Bolts are pre-embedded on the stair beams (A) in the stairwell (C) of the double-flight staircase. Fixed supports (11) of the stairwell (C) of floors i to i+2 are installed. The frame mechanism (1) is installed on the fixed supports (11) through the frame track assembly (13). S2. Install the upper template assembly (2) and lower template assembly (3) of the i+2~i+3 floors on the template track assembly (15) on the front and back of the frame mechanism (1) through sliding supports (21); i is a natural number greater than or equal to 1 and less than or equal to N, and N is the total number of floors of the parallel double-flight staircase. S3, raise the template component (2) of layer i+2 to i+3 to the specified elevation of the previous layer; S4. Tie and fix the stair reinforcement (B) on the formwork assembly (3) of the i+2~i+3 floors. S5. Carry the stair reinforcement (B) up to the specified elevation of the lower formwork assembly (3) of the i+2~i+3 floors, so that the upper formwork assembly (2) and the lower formwork assembly (3) form a complete casting formwork system. S6. Pour concrete for the i+2~i+3 floor staircases, and pre-embed bolts on the stair beams (A) of the stairwell (C) of the double-flight staircase, and then carry out concrete curing. S7. The frame structure (1) is lifted one floor, which drives the upper formwork assembly (2) to be lifted one floor as a whole, but the lower formwork assembly (3) remains at the bottom of the concrete of the i+2~i+3 floor staircase. S8. Install another set of lower formwork components (3) above the newly poured i+2~i+3 floor stair concrete. This unit is the lower formwork component (3) for i+3~i+4 floor. Tie steel bars on the lower formwork component (3) for i+3~i+4 floor. S9. Slide the lower template component (3) of the i+3~i+4 layer to make the upper template unit and the lower template unit of the i+3~i+4 layer form a complete casting template system; S10. Pour concrete for the i+3 to i+4 floor staircases, and pre-embed bolts on the stair beam (A) of the stairwell (C) of the double-flight staircase, and then carry out concrete curing. S11. Lower the lower formwork assembly (3) of the i+2~i+3 floors to the upper part of the stairs of the i+1~i+2 floors, and the construction workers remove the lower formwork unit of the i+2~i+3 floors on the stairs of the i+1~i+2 floors. S12. If i is greater than N, the construction of the parallel double-flight staircase is completed, and the entire parallel double-flight staircase climbing formwork is removed; otherwise, take i = i + 1 and return to S7.