Cutting-free supporting steel pipe system for staircase steering platform formwork

Abstract

A staircase steering platform formwork cutting-free supporting steel pipe system is characterized in that a reinforcing mesh is formed on the surface of a platform formwork through reinforcing steel bars arranged in a criss-cross mode, a plurality of concrete prefabricated cushion blocks are evenly placed in square gaps in the reinforcing mesh, and the height of the concrete prefabricated cushion blocks is the same as the pouring height of a steering platform; the supporting steel pipe assembly comprises a plurality of vertical steel pipes which are evenly arranged, reinforcing rods are arranged between the vertically and horizontally adjacent vertical steel pipes, and the lower ends of the multiple vertical steel pipes are supported on the upper surfaces of the multiple concrete prefabricated cushion blocks in a one-to-one correspondence mode. The concrete prefabricated cushion block is placed on the platform formwork to support the vertical steel pipe, after pouring is completed, the prefabricated cushion block made of concrete can be integrally fused in the steering platform and does not need to be taken out, the vertical steel pipe can be easily removed from the cushion block and is prevented from being embedded in concrete, the procedure of cutting the vertical steel pipe is not needed, and the construction efficiency is improved. And unnecessary economic losses are avoided, the vertical steel pipe dismantling process is simplified, and the construction progress is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a stairwell turning platform template support steel pipe system that does not require cutting. Background Technology

[0002] In common building construction projects, stairwell designs typically include at least one staircase with two flights, featuring upper and lower landing platforms. During the pouring of concrete for the landing platforms, the vertical steel pipes supporting the upper platform are temporarily placed on the formwork of the unpoured middle platform. However, once the concrete for the middle landing platform is poured and hardened, these vertical steel pipes often become embedded in the concrete. The expansion of the hardened concrete makes subsequent removal of these pipes extremely difficult. Currently, the common method is to cut off the lower part of the vertical steel pipes, leaving some inside the concrete. This removal method is not only time-consuming and labor-intensive, affecting construction progress, but also damages the vertical steel pipes in the support system, hindering the reuse of the support system and resulting in economic losses. Utility Model Content

[0003] To address the aforementioned issues, this utility model proposes a stairwell turning platform template without the need for cutting support steel pipes.

[0004] The technical solution of this utility model is: a stairwell turning platform template without cutting support steel pipe system, including platform template and support steel pipe assembly. The surface of the platform template is formed by a steel mesh with steel bars arranged in a crisscross pattern. The steel bars are tied together with wire. Several precast concrete blocks are evenly placed in the square gaps inside the steel mesh. The sides of the precast concrete blocks are roughened. The height of the precast concrete blocks is the same as the pouring height of the turning platform. The support steel pipe assembly includes several evenly arranged vertical steel pipes. The vertical steel pipes are used to support the platform template of the upper layer. Reinforcing rods are provided between adjacent vertical steel pipes, and adjacent reinforcing rods form a square frame. The lower ends of several vertical steel pipes are supported one by one on the upper surface of several precast concrete blocks.

[0005] Preferably, the precast concrete pad is in the shape of a frustum, and the frustum-shaped precast concrete pad has at least four sides. The upper bottom surface of the precast concrete pad supports the platform template surface, and the vertical steel pipe supports the middle of the lower bottom surface of the precast concrete pad.

[0006] Preferably, the bottom surface of the precast concrete pad has a cylindrical protrusion in the middle, and the lower end of the vertical steel pipe is fitted onto the cylindrical protrusion. The diameter of the cylindrical protrusion is smaller than the inner diameter of the vertical steel pipe.

[0007] Preferably, the side of the precast concrete block is densely covered with several irregular blind holes, which are processed during the precast concrete block manufacturing process.

[0008] Preferably, the side of the vertical steel pipe is provided with a number of circular discs at equal intervals. The circular discs are welded and fixed to the side of the vertical steel pipe perpendicularly. Both ends of the reinforcing rod are provided with slots, which are matched and inserted into the circular discs. The size of the slots is slightly larger than the thickness of the circular discs.

[0009] Preferably, the circular disc has a plurality of trapezoidal holes evenly distributed on it, and the end of the reinforcing rod also has a trapezoidal hole. A trapezoidal pin is inserted between the trapezoidal holes on the circular disc and the trapezoidal holes on the reinforcing rod, and the trapezoidal pin is inserted into the trapezoidal hole from top to bottom.

[0010] The beneficial technical effects of this utility model are:

[0011] This invention supports vertical steel pipes by placing precast concrete blocks on the platform template. After the concrete is poured, the precast concrete blocks are integrated into the turning platform and do not need to be removed. The vertical steel pipes can be easily removed from the blocks, avoiding them from being embedded in the concrete. This eliminates the need for cutting the vertical steel pipes, avoids unnecessary economic losses, simplifies the vertical steel pipe removal process, and speeds up the construction progress. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the utility model in use;

[0013] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0014] Figure 3 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 4 This is a three-dimensional structural diagram of vertical steel pipes and precast concrete blocks.

[0016] In the diagram, 1. Platform template, 2. Steel mesh, 21. Steel bar, 3. Precast concrete pad, 31. Top surface, 32. Bottom surface, 33. Cylindrical protrusion, 34. Irregular blind hole, 4. Vertical steel pipe, 41. Circular disc, 42. Trapezoidal hole, 5. Reinforcing rod, 6. Staircase. Detailed Implementation

[0017] Example 1, see appendix Figure 1 , 3A non-cutting support steel pipe system for a six-bay staircase turning platform formwork includes a platform formwork 1 and supporting steel pipe components. The surface of the platform formwork 1 is reinforced with a steel mesh 2 formed by crisscrossing steel bars 21. Several precast concrete blocks 3 are evenly placed within the square gaps inside the steel mesh 2. The height of the precast concrete blocks 3 is the same as the pouring height of the turning platform. The blocks are made of C35 strength concrete, with the same strength as the concrete of the turning platform, ensuring the strength and durability of the blocks within the turning platform.

[0018] The supporting steel pipe assembly includes several evenly arranged vertical steel pipes 4. Reinforcing rods 5 are provided between adjacent vertical steel pipes 4. The lower ends of several longitudinal steel pipes are supported one-to-one on the upper surface of several precast concrete blocks 3. The blocks support the vertical steel pipes 4. After the pouring is completed, the precast concrete blocks can be integrated into the turning platform without removal. The vertical steel pipes 4 can be easily removed from the blocks to prevent them from being embedded in the concrete.

[0019] The vertical steel pipe 4 has several circular discs 41 evenly spaced on its side. The reinforcing rod 5 has slots at both ends, which fit into the circular discs 41. The circular discs 41 have several trapezoidal holes 42 evenly distributed on them. The reinforcing rod 5 can be connected to the vertical steel pipe 4 from various directions through the circular discs 41. The end of the reinforcing rod 5 also has trapezoidal holes 42. A trapezoidal pin is inserted between the trapezoidal holes 42 on the circular discs 41 and the trapezoidal holes 42 on the reinforcing rod 5. The reinforcing rod 5 can be quickly connected to the circular discs 41 through the trapezoidal pin. It has the advantages of convenient and flexible connection and disassembly operations.

[0020] The specific construction steps are as follows:

[0021] ① Spacer block fabrication: Using the leftover concrete from each pour of 6 stairwells or other sections, spacer blocks are prefabricated using pre-made spacer block templates to ensure that the quality of the spacer blocks meets the design requirements.

[0022] Using leftover concrete from the construction process to make spacers not only meets the structural strength requirements but also achieves the reuse of waste materials, which meets the requirements of energy conservation and environmental protection.

[0023] ② Acceptance of Platform Formwork 1 and Reinforcing Steel 21: After the installation of the platform formwork 1 and the binding of the reinforcing steel 21 on the middle floor of staircase 6 are completed, a strict quality inspection is carried out to ensure that the formwork is flat and stable, and that the reinforcing steel 21 is accurately positioned and firmly bound.

[0024] ③Pack block arrangement: Place the precast concrete pad blocks 3 on the formwork 1 of the middle turning platform of the stair 6, avoiding the position of the reinforcing bars 21, and arrange the pad blocks reasonably according to the number and position of the vertical steel pipes 4 of the support system.

[0025] ④ Installation of vertical steel pipe 4: Place the vertical steel pipe 4 of the support steel pipe assembly of the upper turning platform on the pad, adjust the position of the vertical steel pipe 4 to ensure that the vertical steel pipe 4 is stable and does not shift, and take necessary reinforcement measures.

[0026] ⑤ Concrete pouring and curing: After completing the above steps, pour the concrete and strictly follow the concrete curing specifications to ensure that the concrete reaches the design strength.

[0027] ⑥ Removal of the support system: After the concrete has cured to a certain age, the support steel pipe components and formwork are removed. Since the vertical steel pipe 4 is placed on top of the precast concrete pad 3, the removal process is easy and will not damage the vertical steel pipe 4 or the concrete structure.

[0028] This embodiment, through reasonable pad design and construction steps, ensures the quality and construction safety of the concrete pouring for the turning platforms of the six staircases. While solving the problems existing in traditional construction methods, it also has significant economic and social benefits and is worthy of promotion and application in building construction projects.

[0029] Example 2, see appendix Figure 2-4 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the precast concrete pad 3 is in the shape of a regular truncated pyramid. The upper bottom surface 31 of the precast concrete pad 3 supports the surface of the platform template 1, and the vertical steel pipe 4 is supported in the middle of the lower bottom surface 32 of the precast concrete pad 3. The angular structure of the regular truncated pyramid pad can protrude into the concrete, which has the advantage of high embedding strength.

[0030] A cylindrical protrusion 33 is provided in the middle of the bottom surface 32 of the precast concrete pad block 3. The lower end of the vertical steel pipe 4 is fitted onto the cylindrical protrusion 33. The cylindrical protrusion 33 provides positioning for the vertical steel pipe 4, thereby improving the stability of the vertical steel pipe 4 supported on the surface of the precast concrete pad block 3.

[0031] The side of the precast concrete pad block is densely covered with several irregular blind holes 34. The concrete of the steering platform can enter into the irregular blind holes 34 to form a fully nested and integrated structure, which further improves the stability of the pad block in the steering platform.

Claims

1. A stairwell turning platform formwork support steel pipe system that requires no cutting, characterized in that: The system includes a platform template and supporting steel pipe components. The surface of the platform template is reinforced with a steel mesh formed by crisscrossing steel bars. Several precast concrete blocks are evenly placed in the square gaps inside the steel mesh. The height of the precast concrete blocks is the same as the pouring height of the turning platform. The supporting steel pipe components include several evenly arranged vertical steel pipes. Reinforcing rods are installed between adjacent vertical steel pipes. The lower ends of the several vertical steel pipes are supported on the upper surface of several precast concrete blocks.

2. The stairwell turning platform formwork support steel pipe system without cutting as described in claim 1, characterized in that: The precast concrete pad is in the shape of a regular frustum. The upper bottom surface of the precast concrete pad supports the surface of the platform template, and the vertical steel pipe supports the middle of the lower bottom surface of the precast concrete pad.

3. The stairwell turning platform formwork support steel pipe system without cutting according to claim 2, characterized in that: The bottom surface of the precast concrete pad block has a cylindrical protrusion in the middle, and the lower end of the vertical steel pipe is fitted onto the cylindrical protrusion.

4. The stairwell turning platform formwork without cutting support steel pipe system according to claim 3, characterized in that: The side of the precast concrete pad block is densely covered with several irregular blind holes.

5. The stairwell turning platform formwork support steel pipe system without cutting according to claim 1, characterized in that: The vertical steel pipe has several circular discs spaced at equal intervals on its side, and the two ends of the reinforcing rod are provided with slots that fit into the circular discs.

6. The stairwell turning platform formwork support steel pipe system without cutting according to claim 5, characterized in that: The circular disc has several trapezoidal holes evenly distributed on it, and the end of the reinforcing rod also has a trapezoidal hole. A trapezoidal pin is inserted between the trapezoidal holes on the circular disc and the trapezoidal holes on the reinforcing rod.

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