Stair construction process

Abstract

The invention relates to the technical field of stair construction, in particular to a stair construction technology which comprises the following steps that firstly, a vertical rod control line is arranged, and vertical rods are arranged so as to ensure the accuracy and stability of construction; then, an adjustable U-shaped support, primary and secondary keels and a stair bottom formwork are installed, and the elevation is corrected to guarantee the construction flatness; then, steel bars are bound according to a design drawing, the step formworks and the side formworks are installed, and the overall stability and stress uniformity of the formworks are guaranteed in the process; then, the formwork is reinforced and accepted, and it is ensured that construction meets the standard; during concrete pouring, it is ensured that the concrete is compact and free of bubbles through the vibrating rod; and finally, the formwork is removed according to related requirements, and it is ensured that a concrete finished product is intact. According to the process, through systematic steps and strict quality control, the problem that in traditional stair construction, formwork supporting is not stable is solved, the construction efficiency is improved, and the engineering risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of staircase construction, and in particular to a staircase construction process. Background Art

[0002] When constructing existing staircases, a steel pipe fastener support system is generally used. The spacing between vertical poles generally exceeds 800 mm and there is no effective connection with the main structures of the cast-in-place floor slabs and shear walls in the building, resulting in insufficient support stiffness. During the pouring process of staircase concrete, a certain horizontal displacement occurs, leading to unstable support of the staircase formwork and low quality of staircase concrete pouring. Therefore, a staircase construction process is needed to improve the quality of staircase construction. Summary of the Invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a staircase construction process.

[0004] A staircase construction process provided by the present invention includes the following steps: S1. Lofting dimension control lines and erecting vertical poles According to the staircase position, corresponding dimension control lines are lofted. According to the dimension control lines, the vertical poles of the stair section are arranged, and at the same time, the vertical poles of the stair section are connected to the vertical poles of other floor slabs and the vertical poles under the beams to ensure the overall stability of the framework. S2. Laying the main keel and secondary keel and installing the floor bottom formwork; S3. Binding the staircase steel bars and installing the staircase side formwork; S4. Formwork reinforcement; Temporary vertical poles are added at the mid-span position of the staircase. Wedges are tightly stuffed at the contact surface between the adjustable U-shaped supports and the main keel. After the overall installation of the formwork is completed, the staircase step formwork is reinforced. Wooden formwork strips are connected between two adjacent upper and lower step formworks, and a pressing strip is connected above the wooden formwork strips; S5. Concrete pouring; During the concrete pouring process, a vibrating rod is used to vibrate the concrete until it stops sinking, no bubbles are discharged, and it oozes mortar; S6. Formwork removal; When removing the formwork, the strength standard must be followed to ensure that the surface and edges of the concrete are not damaged and the quality of the final product is maintained.

[0005] Optionally, in step S2, after installing the adjustable U-shaped supports on the top of the vertical poles, the main keel and the secondary keel are laid to form the basic support framework of the staircase, and the staircase bottom formwork is installed on the secondary keel. The staircase bottom formwork needs to be leveled and corrected to ensure the horizontality and verticality of the staircase.

[0006] Optionally, in step S3, after the elevation of the staircase is determined correctly, the staircase steel bars are tied, and then the side formwork of the staircase is installed. A tie bolt is installed every three steps to penetrate the width of the steps to ensure the lateral flatness of the staircase. After the installation of the side formwork of the staircase is completed, the step formwork of the staircase is installed.

[0007] Optionally, in step S5, when the concrete begins to set, the surface is troweled to make the concrete surface smooth.

[0008] Compared with the prior art, the present invention has the following technical effects: This process solves the problems existing in traditional staircase construction through systematic steps and strict quality control, improves the construction efficiency, and reduces the engineering risks. Description of the Drawings

[0009] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0011] Figure 3 is Figure 1 an enlarged schematic diagram of part B in

[0012] Description of the reference numerals: 1, bottom formwork of the staircase; 2, side formwork; 3, step formwork; 4, adjustable U-shaped support; 5, vertical pole under the beam; 6, vertical pole of the flight of stairs; 7, vertical pole of the floor slab; 8, main keel; 9, secondary keel; 10, wooden formwork strip; 11, pressing strip; 12, step formwork keel. Detailed Description of the Embodiment

[0013] The following further describes the present invention in detail Figure 1 - with reference to the Figure 3 drawings.

[0014] Referring to Figures 1 - 3 , an embodiment of the present invention discloses a staircase construction structure, including a bottom support assembly, a bottom formwork 1 of the staircase and a side formwork 2. The bottom support assembly includes vertical poles and adjustable U-shaped supports 4. An adjustable base is installed at the bottom of the vertical poles, and a thick wooden cushion plate is arranged below the adjustable base. The vertical poles include vertical poles 5 under the beam, vertical poles 6 of the flight of stairs and vertical poles 7 of the floor slab. The vertical poles 6 of the flight of stairs are connected to the vertical poles 5 under the beam and the vertical poles 7 of the floor slab through horizontal bars, so as to ensure the overall stability of the framework. The horizontal bars and each vertical pole are connected through rotary fasteners.

[0015] The adjustable U-shaped support 4 is installed at the top of the vertical pole. The main keel 8 is placed inside the adjustable U-shaped support 4. The main keel 8 is a double steel pipe with a diameter of φ48×2.7mm. The double steel pipe and the adjustable U-shaped support 4 are tied tightly with iron wire. The distance between two adjacent main keels 8 is 900mm. The secondary keel 9 is arranged above the main keel 8. The secondary keel 9 is a wooden square with a size of 50×80mm. The distance between two adjacent secondary keels 9 is 300mm. The secondary keel 9 and the main keel 8 are fixed with iron nails and tied tightly with iron wire. The stair bottom formwork 1 is arranged above the secondary keel 9. The secondary keel 9 and the stair bottom formwork 1 are fixed with iron nails.

[0016] Stair side formworks 2 are arranged on both sides of the stair bottom formwork 1. The stair bottom formwork 1 and the side formwork 2 are connected with iron nails. The step formwork 3 is arranged above the side formwork 2. The step formwork 1 and the side formwork 2 are connected with iron nails. The step formwork keel 12 is fixed on the outside of the step formwork 3. The step formwork keel 12 is a wooden square with a size of 50×80mm. Two wooden formwork strips 10 are fixedly connected between two adjacent upper and lower step formworks 3. The pressing strip 11 is fixed above the wooden formwork strip 10. A tie bolt is arranged between two stair side formworks 2, and one is set every three steps.

[0017] The embodiment of the present invention also discloses a stair construction process, which includes the following steps: S1. Lofting dimension control lines and erecting vertical poles The corresponding dimension control lines are obtained by lofting according to the stair position. The stair section vertical poles 6 are arranged according to the dimension control lines. At the same time, the stair section vertical poles 6 are connected to other floor vertical poles 7 and the vertical poles 5 under the beam to ensure the overall stability of the framework.

[0018] S2. Laying the main keel 8 and the secondary keel 9 and installing the floor bottom formwork After installing the adjustable U-shaped support 4 at the top of the vertical pole, the main keel 8 and the secondary keel 9 are laid to form the basic support framework of the stair. The stair bottom formwork 1 is installed on the secondary keel 9. The stair bottom formwork 1 needs to be corrected by elevation to ensure the horizontal and vertical of the stair.

[0019] S3. Binding stair steel bars and installing the stair side formwork 2 After the elevation of the stair is determined correctly, the stair steel bars are bound, and then the stair side formwork 2 is installed. A tie bolt is made every three steps to connect through the step width to ensure the lateral flatness of the stair. After the installation of the stair side formwork 2 is completed, the stair step formwork 3 is installed.

[0020] S4. Formwork reinforcement Temporary vertical poles are added at the mid-span position of the stair. Wooden wedges are wedged tightly at the contact surface between the adjustable U-shaped support 4 and the main keel 8. After the overall installation of the formwork is completed, the stair step formwork 3 is reinforced. Two wooden formwork strips 10 are connected between two adjacent upper and lower step formworks 3, and the pressing strip 11 is connected above the wooden formwork strip 10.

[0021] S5, Concrete pouring During the concrete pouring process, a vibrating rod is used to vibrate the concrete until it no longer sinks, no air bubbles are discharged, and it oozes mortar. At the same time, when the concrete begins to set, the surface is troweled to achieve a smooth surface effect.

[0022] S6, Formwork removal When removing the formwork, the strength standard must be followed to ensure that the concrete surface and edges are not damaged and the quality of the final product is maintained. When removing the side formwork, it can only be removed when the concrete strength reaches above 1.2 Mpa, and the concrete surface shall not be directly pried.

[0023] The construction process of the present invention realizes the systematic management of staircase construction, ensures the safety, stability and finished product quality during the construction process, thereby effectively reducing the construction risk and improving the project efficiency.

[0024] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited hereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A stair construction process, characterized in that: The steps include: S1. Laying out the size control line and setting up the poles; According to the stair position, a corresponding size control line is obtained by lofting, and the stair section uprights (6) are arranged according to the size control line. At the same time, the stair section uprights (6) are connected with other floor uprights (7) and beam lower uprights (5) to ensure the overall stability of the frame; S2, layout of the main keel (8) and the secondary keel (9) and installation of the floor bottom formwork; S3. Tie up the staircase reinforcement and install the staircase side formwork (2); S4, formwork reinforcement; A temporary vertical pole is added at the mid-span of the staircase, and a wooden wedge is set up to tighten the contact surface between the adjustable U-support (4) and the main keel (8). After the overall installation of the template is completed, the stair tread template (3) is reinforced, and a wooden template strip (10) is connected between two adjacent tread templates (3) above and below, and a compression strip (11) is connected above the wooden template strip (10); S5, concrete pouring; During the concrete pouring process, a vibrating rod is used to vibrate the concrete until it does not sink, no bubbles are discharged, and the concrete is slurry; S6, template removal; When removing the formwork, strength standards must be followed to ensure that the concrete surface and edges are not damaged and the quality of the final product is maintained.

2. The staircase construction process according to claim 1, characterized in that: In step S2, after the adjustable U-bracket (4) is installed on the top of the vertical pole, the main keel (8) and the secondary keel (9) are arranged to form a basic support frame of the stairs, and the stair bottom template (1) is installed on the secondary keel (9). The stair bottom template (1) needs to be calibrated in elevation to ensure that the stairs are horizontal and vertical.

3. The staircase construction process according to claim 1 or 2, characterized in that: In step S3, after the elevation of the stairs is confirmed to be correct, the staircase reinforcement is tied, and then the staircase side formwork (2) is installed. A tension bolt is made every three steps to pass through the step width to ensure the lateral flatness of the stairs. After the staircase side formwork (2) is installed, the stair tread formwork (3) is installed.

4. The staircase construction process according to claim 1, characterized in that: In step S5, when the concrete starts to solidify, the surface is smoothed and pressed to make the concrete surface smooth.

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