A stair prefabricating method based on special-shaped hanging nails

Abstract

The present application relates to stair prefabrication technical field, disclose a kind of stair prefabrication method based on special-shaped hanging nail, including S1: to the opposite insertion rod between two special-shaped hanging nails inserts transverse limiting steel bar and is fixed in the reserved hole of ladder mould, not less than two groups are arranged according to this step, S2: end skeleton is arranged at the both ends of mould, with opposite insertion rod as support point, first, not less than two longitudinal leaning step steel bars are laid and cooperate transverse limiting steel bar to form leaning step rectangular frame, S3: with opposite support rod as support point, first, not less than two longitudinal back steel bars are laid, and longitudinal back steel bar both ends are fixed with end skeleton;The scheme uses special-shaped hanging nail, uses transverse limiting steel bar to connect opposite insertion rod and is combined to form frame structure to ensure that support is stable, to realize support placement, the mode of uniform bundling, under the premise that special-shaped hanging nail support is stable, two lower multiple upper transverse back steel bar arrangement is used to arrange back frame, simplify high-density steel skeleton and the construction mode of embedded part cooperation.

Description

Technical Field

[0001] This invention relates to the field of prefabricated staircase technology, specifically a method for prefabricating staircases based on irregularly shaped hanging nails. Background Technology

[0002] The interior of the precast staircase mold needs to be filled with a steel reinforcement frame to increase strength. Currently, precast staircases mainly have connecting structures at both ends, and the sides of the precast staircases are all smooth and have no exposed frame.

[0003] Chinese patent discloses a staircase mold and its usage method (CN122275134A). This patent features a fixed and easily selectable position of the embedded parts. By using the embedded parts as a reference to limit the position of the step frame, it is beneficial to improve the accuracy of the pre-installation of the frame, further improve the strength of the embedded parts, and improve the convenience of frame splicing and binding.

[0004] However, when applied to high-density steel reinforcement cages, this patented method encountered the following problems: The aforementioned patent specification discloses that "after the reinforcement frame, back frame, and step frame are processed, they are installed into the frame in the order of reinforcement frame-step frame-back frame". However, the embedded part is perpendicular to the step surface, and the top projection length of the embedded part is elongated due to the tilt. Because the high-density steel skeleton has narrow pores, it cannot be realized when the top projection length of the embedded part is greater than the pores of the high-density steel skeleton.

[0005] If a layer-by-layer binding method is used, the aforementioned patent only describes that the binding surface of the embedded part has grooves or protrusions for supporting the reinforcing bars, and the reinforcing bars can be inserted into the grooves or two adjacent protrusions. The protrusions or grooves can only provide stable support when the parts are bound, and they also need to be supported by hand or auxiliary tools before binding.

[0006] Therefore, a construction method is needed that is compatible with the high-density steel reinforcement cage and the embedded parts, and that allows for easy binding of the high-density steel reinforcement cage within the mold and in conjunction with the embedded parts. Summary of the Invention

[0007] The purpose of this invention is to provide a method for prefabricating stairs based on irregularly shaped hanging nails. This technical solution uses irregularly shaped hanging nails and utilizes transverse limiting steel bars to connect relative insert rods and combine them to form a frame structure to ensure stable support, thereby realizing the placement of supports and a unified binding method, which completely simplifies the construction method of cooperating high-density steel skeleton and embedded parts, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A method for prefabricating stairs based on irregularly shaped hanging nails, comprising: S1: Insert the transverse limiting steel bar between the opposite inserts of the two irregularly shaped hanging nails and fix it in the reserved hole of the stepped formwork. Install no less than two sets in this manner. S2: The end frame is placed at both ends of the mold, with the relative insertion rod as the support point. First, lay no less than two longitudinal step-up steel bars and cooperate with the transverse limiting steel bars to form a step-up rectangular frame. The two ends of the longitudinal step-up steel bars are fixed to the end frame. Finally, with the longitudinal step-up steel bars as the support point, lay the transverse step-up steel bars to form a step-up frame grid. S3: Using the opposite support rods as support points, first lay no less than two longitudinal back reinforcement bars. The two ends of the longitudinal back reinforcement bars are fixed to the end frame, and the transverse back reinforcement bars are fixed at the bottom of the two longitudinal back reinforcement bars to form a rectangular frame. The longitudinal back reinforcement bars are laid in sequence with the transverse back reinforcement bars fixed at the bottom as support. Finally, the transverse back reinforcement bars are laid on the basis of the longitudinal back reinforcement bars until the back frame grid is formed. S4: Add concrete, vibrate, solidify, and open the mold to obtain the finished product.

[0009] As a further embodiment of the present invention: In S2: two transverse step-up steel bars are fixed at the top of each end of several longitudinal step-up steel bars. The longitudinal step-up steel bars are fixed with the two transverse step-up steel bars as fixing points until the longitudinal step-up steel bars are evenly distributed transversely along the mold cavity. Then, the transverse step-up steel bars are laid and fixed in sequence until a step-up frame grid is formed.

[0010] As a further embodiment of the present invention: in step S1, arc-shaped grooves are provided on the circumferential sides of the opposite insertion rod and the circumferential sides of the back support rod, and when the suspension rod is perpendicular to the stepped surface, the axis of the arc-shaped groove is horizontal.

[0011] As a further aspect of the present invention: in step S1, the bottom surface of the arc-shaped groove of the relative insertion rod is flush with the top of the end insertion hole of the relative insertion rod.

[0012] As a further embodiment of the present invention: the opposing support rods and the opposite insertion rods are symmetrically distributed on both sides of the hanger, and the hanger is located between the gaps in the stepped frame grid and the gaps in the back frame grid.

[0013] As a further embodiment of the present invention: the top of the lifting rod is lower than the upper open surface of the mold.

[0014] As a further embodiment of the present invention: the opposing support rods have a gap with the mold sidewall, and the gap is greater than the diameter of the longitudinal back reinforcement.

[0015] As a further embodiment of the present invention: the transverse step reinforcement bars and the mold sidewalls have a gap, and the gap is greater than the diameter of the longitudinal back reinforcement bars.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This technical solution uses irregularly shaped hanging nails, and utilizes transverse limiting steel bars to connect opposite inserts and combine them to form a frame structure to ensure stable support. This achieves a unified method of support placement and binding, and the opposing support rods have virtually no impact on the foundation operating surface, improving the convenience and stability of the stepped frame assembly. Under the premise of stable support by irregularly shaped hanging nails, a two-bottom-multiple-top transverse back steel bar arrangement is used to install the back frame, which also achieves a unified method of support placement and binding. This completely simplifies the construction method of cooperating with high-density steel skeleton and embedded parts, and there are very few interference problems between the two layers during processing, improving the convenience of use. Furthermore, the irregularly shaped hanging nails with end skeleton limiting on the above basis are more stable during vibration. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 these drawings without creative effort.

[0018] Figure 1 This is a construction diagram of the step frame grid in a staircase prefabrication method based on irregularly shaped hanging nails; Figure 2 This is a construction diagram of the back frame grid in a staircase prefabrication method based on irregularly shaped hanging nails; Figure 3 This is a schematic diagram of the placement of the mid-end frame in a staircase prefabrication method based on irregularly shaped hanging nails; Figure 4 This is a schematic diagram of irregularly shaped hanging nails in a method for prefabricating stairs based on irregularly shaped hanging nails; Figure 5 This is a side view schematic diagram of the use of irregularly shaped hanging nails in a method for prefabricating stairs based on irregularly shaped hanging nails; Figure 6 This is a schematic diagram of the finished skeleton in a staircase prefabrication method based on irregularly shaped hanging nails; Detailed Implementation

[0019] Please see Figures 1-6 This example includes the following steps: S1: Insert the transverse limiting steel bar between the opposite inserts of the two irregularly shaped hanging nails and fix it in the reserved hole of the stepped formwork. Install no less than two sets in this manner. Please see Figure 1 , Figure 3 , Figure 4This technical solution incorporates opposing inserts and back-to-back bracing rods into the irregularly shaped hanger nails within the embedded parts. The back-to-back bracing rods and opposing inserts are symmetrically distributed on both sides of the hanger rod. The ingenuity of this design lies in the fact that when installing the stepped frame, the opposing inserts serve as supports. If the back-to-back inserts are directly above the opposing inserts, it will cause installation interference, severely impacting construction convenience.

[0020] Furthermore, the irregularly shaped hanger nails are fixed in the same way as existing embedded parts, using corrugated rubber hanger nails to fix them to the stepped formwork. Please refer to [link / reference]. Figure 4 A transverse limiting steel bar is inserted between the two opposing rods. After the transverse limiting steel bar and the insertion hole are positioned, the two rods cannot move in the direction indicated by the arrow in the diagram. Similarly, the two rods cannot move in any direction. Figure 4 The camera rotates in the same direction both left and right. The lateral limiting steel bars serve both as lateral frame support and as a limiter for the hanger rods.

[0021] S2: The end frame is placed at both ends of the mold, with the relative insertion rod as the support point. First, lay no less than two longitudinal step-supporting steel bars and cooperate with the transverse limiting steel bars to form a step-supporting rectangular frame. The two ends of the longitudinal step-supporting steel bars are fixed to the end frame. Finally, with the longitudinal step-supporting steel bars as the support point, lay the transverse step-supporting steel bars to form a step-supporting frame grid.

[0022] The end frames are located at both ends of the staircase, primarily serving a connecting and reinforcing function. In the current mold, the end frames are situated within the cavities at both ends of the step mold. During the construction of the step-supporting frame, at least two longitudinal step-supporting reinforcing bars are first laid, forming a rectangular step-supporting frame in conjunction with transverse limiting reinforcing bars. The ends of the longitudinal step-supporting reinforcing bars are connected to the end frames. The end frames themselves are inclined and constrained by the mold cavity. The longitudinal step-supporting reinforcing bars and irregularly shaped hanging nails provide longitudinal constraint, ensuring the irregularly shaped hanging nails are in a stable supporting state. Throughout the entire process, operators do not need to use tools to assist in constraint; the reinforcing bars are simply placed and tied at equal intervals.

[0023] Furthermore, two transverse step-up bars are fixed to the top of each end of several longitudinal step-up bars. The longitudinal step-up bars are then fixed using the two transverse step-up bars as fixing points until the longitudinal step-up bars are evenly distributed transversely along the mold cavity. Then, the transverse step-up bars are laid and fixed in sequence until a step-up frame grid is formed.

[0024] If the difference between the horizontal spacing of the two irregular ceiling shapes and the horizontal spacing of the mold is large, the longitudinal step-supporting steel bars cannot fix the hanger near the side wall of the mold while in a supported state. Therefore, two transverse step-supporting steel bars are fixed at the top of each end of the longitudinal step-supporting steel bars. Since there is a gap between the back support rod and the side wall of the mold, and a gap between the transverse step-supporting steel bars and the side wall of the mold, both gaps are larger than the diameter of the longitudinal back support bar. Therefore, a small number of longitudinal step-supporting steel bars are tied and fixed below the two transverse step-supporting steel bars through the gaps until the longitudinal step-supporting steel bars are evenly laid out. Then, the transverse step-supporting steel bars are placed at equal intervals and tied one by one to finally form a step-supporting frame grid.

[0025] At this point, the integrated support of the end frame, the stepped frame mesh, and the irregularly shaped hanging nails greatly enhances the supporting effect of the irregularly shaped hanging nails, and the stepped frame mesh and the stepped surface have a gap.

[0026] S3: Using the opposite struts as support points, first lay no less than two longitudinal back reinforcement bars. Fix the two ends of the longitudinal back reinforcement bars to the end frame, and fix the transverse back reinforcement bars at the bottom of the two longitudinal back reinforcement bars to form a rectangular frame. Use the transverse back reinforcement bars fixed at the bottom as support to lay the longitudinal back reinforcement bars in sequence. Finally, lay the transverse back reinforcement bars based on the longitudinal back reinforcement bars until the back frame grid is formed.

[0027] Based on the aforementioned effects, the stability of the irregularly shaped hanging nail can be guaranteed. Therefore, using back-to-back bracing as the main support, at least two longitudinal back reinforcement bars are first installed, and transverse back reinforcement bars are fixed at the bottom of the two longitudinal back reinforcement bars to form a rectangular frame. The advantage of setting it on the back is that, firstly, a longitudinal back reinforcement bar grid is established. Since there are more transverse back reinforcement bars, establishing a longitudinal back reinforcement bar grid can provide a flat base for the transverse back reinforcement bars. After quick flattening, the contact points of the reinforcement bars are tied together, and the longitudinal back reinforcement bars are locked to the end frame.

[0028] S4: Add concrete, vibrate, solidify, and open the mold to obtain the finished product. Due to the composite support achieved above, the entire frame is in a stable position, making the concrete pouring and vibration process more stable.

[0029] Furthermore, in step S1, arc-shaped grooves are provided on the circumferential sides of the opposite insertion rod and the circumferential sides of the back support rod, and when the suspension rod is perpendicular to the stepped surface, the axis of the arc-shaped groove is horizontal.

[0030] Please see Figure 5 In this technical solution, the arc-shaped groove fits the reinforcing bar better. After fixing, the reinforcing bar and the arc-shaped groove have a contact surface, making the positioning more stable. The arc-shaped groove can also limit the position of the reinforcing bar.

[0031] Furthermore, in step S1, the bottom surface of the arc-shaped groove of the relative insert rod is flush with the top of the end insertion hole of the relative insert rod. Since the transverse limiting reinforcement also needs to be tied with the longitudinal step reinforcement, similarly, the relative insert rod also needs to be tied with the longitudinal step reinforcement. When the bottom surface of the arc-shaped groove is flush with the top of the end insertion hole of the relative insert rod, it can be ensured that the step frame is located on the same plane, and the structure is more stable.

[0032] Furthermore, by ensuring that the top of the hanger is lower than the upper open surface of the mold, it can be completely submerged in the concrete slurry, thus preventing it from being exposed.

[0033] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for prefabricating stairs based on irregularly shaped hanging nails, characterized in that: include: S1: Insert a transverse limiting steel bar between the opposite inserts of the two irregular-shaped hanging nails and fix the two irregular-shaped hanging nails in the reserved holes of the stepped formwork. Install no less than two sets in this manner. S2: The end frame is placed at both ends of the mold, with the relative insertion rod as the support point. First, lay no less than two longitudinal step-up steel bars and cooperate with the transverse limiting steel bars to form a step-up rectangular frame. The two ends of the longitudinal step-up steel bars are fixed to the end frame. Finally, with the longitudinal step-up steel bars as the support point, lay the transverse step-up steel bars to form a step-up frame grid. S3: Using the opposite support rods as support points, first lay no less than two longitudinal back reinforcement bars. The two ends of the longitudinal back reinforcement bars are fixed to the end frame, and the transverse back reinforcement bars are fixed at the bottom of the two longitudinal back reinforcement bars to form a rectangular frame. The longitudinal back reinforcement bars are laid in sequence with the transverse back reinforcement bars fixed at the bottom as support. Finally, the transverse back reinforcement bars are laid on the basis of the longitudinal back reinforcement bars until the back frame grid is formed. S4: Add concrete, vibrate, solidify, and open the mold to obtain the finished product; The opposing support rods and the opposite insertion rods are symmetrically distributed on both sides of the hanging rod of the irregular hanging nail, and the hanging rods are located between the gaps of the stepped frame grid and the gaps of the back frame grid.

2. The method for prefabricating stairs based on irregularly shaped hanging nails according to claim 1, characterized in that: In S2: At the top of each end of several longitudinal step-up steel bars, two transverse step-up steel bars are fixed. The longitudinal step-up steel bars are then fixed using the two transverse step-up steel bars as fixing points until the longitudinal step-up steel bars are evenly distributed transversely along the mold cavity. Then, the transverse step-up steel bars are laid and fixed in sequence until a step-up frame grid is formed.

3. The method for prefabricating stairs based on irregularly shaped hanging nails according to claim 1, characterized in that: In step S1, arc-shaped grooves are provided on the circumferential sides of the opposite insertion rod and the circumferential sides of the back support rod. When the hanging rod is perpendicular to the stepped surface, the axis of the arc-shaped groove is horizontal.

4. A method for prefabricating stairs based on irregularly shaped hanging nails according to claim 3, characterized in that: In step S1, the bottom surface of the arc-shaped groove of the relative insertion rod is flush with the top of the end insertion hole of the relative insertion rod.

5. A method for prefabricating stairs based on irregularly shaped hanging nails according to claim 1, characterized in that: The top of the lifting rod is lower than the upper open surface of the mold.

6. A method for prefabricating stairs based on irregularly shaped hanging nails according to claim 1, characterized in that: The opposing support rods are spaced apart from the mold sidewalls, and the distance between them is greater than the diameter of the longitudinal back reinforcement.

7. A method for prefabricating stairs based on irregularly shaped hanging nails according to claim 1, characterized in that: The transverse step reinforcement bars are spaced from the side wall of the mold, and the spacing is greater than the diameter of the longitudinal back reinforcement bars.

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