Beam end concrete blocking and reinforcing steel bar positioning method

Abstract

The invention relates to the technical field of building construction, in particular to a beam end concrete blocking and reinforcing steel bar positioning method. S1, establishing a steel bar three-dimensional model by using a BIM technology; s2, preparing a steel screen unit according to the size of the plugging surface, and locking and fixing by matching with a gasket to form a whole steel screen with the same size as the plugging surface. And S3, positioning openings matched with the steel bars in number are accurately cut in the whole steel screen according to the three-dimensional model. And S4, the machined steel plate net is integrally arranged in the main reinforcements in a sleeving mode, and the positioning openings are aligned with the main reinforcements. And S5, binding and fixing the whole steel screen and the main reinforcements through thin iron wires. And S6, a concrete pouring gap is reserved between the whole steel screen and the beam end formwork. And S7, when the high-strength concrete is poured, the steel plate net integrally intercepts the concrete to flow. The integral structure formed by lap joint and fixation of the steel screen units can bear concrete pouring pressure, the steel bar conflict risk is eliminated through accurate matching of the positioning openings and the main bars, and the method has the steel bar positioning function while forming a strength interface.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a method for beam end concrete blocking and steel bar positioning. Background Art

[0002] In the field of construction engineering, the phenomenon of inconsistent concrete grades for beams and columns is common, especially in high-rise buildings or complex structural designs. High-strength concrete is often required at the ends of columns to meet bearing capacity requirements, while beams and slabs may use lower grades due to force requirements. In traditional construction, such differences often lead to difficulties in handling joints. Existing technologies mostly use wire mesh for sealing, but this can easily lead to quality defects such as broken beams and honeycombed surfaces at joints, and low-strength concrete filling at the ends of columns is difficult to meet design requirements. Some projects have tried to use inflatable rubber rods for sealing, but there is a risk of damage and leakage, and the maintenance cost is high; other solutions unify the standards by raising the concrete grades for beams and slabs, but this significantly increases construction costs.

[0003] The aforementioned method exposed multiple limitations during implementation: the steel mesh lacked mechanical strength to withstand the pressure of concrete pouring; the inflatable rods had poor durability and were prone to failure from repeated use; and while design changes could circumvent the joint problem, they violated the principle of economic efficiency. Furthermore, the existing technology lacked auxiliary functions for rebar positioning, which could easily lead to uncontrolled cover thickness or rebar collisions, further compromising structural safety. Summary of the Invention

[0004] The present invention aims to solve the above problems, thereby providing a method for beam end concrete blocking and reinforcement positioning to ensure construction safety.

[0005] The present invention solves the above problems by adopting the following technical solutions: A method for beam end concrete sealing and steel bar positioning, characterized by comprising the following steps: S1: Use BIM technology to build a three-dimensional steel bar model to determine the spatial position relationship between each steel bar and the size of the blocking surface.

[0006] S2: Prepare steel plate mesh units according to the size of the blocking surface. There is a partial overlapping area between adjacent steel plate units. Use fixing bolts to pass through the overlapping area and lock and fix with gaskets to form a steel plate mesh as a whole with the same size as the blocking surface.

[0007] S3: Based on the 3D model, accurately cut out positioning openings on the entire steel mesh that match the number of steel bars.

[0008] S4: During the beam reinforcement installation stage, the processed steel plate mesh is inserted into the main reinforcement as a whole so that the positioning port is aligned with the main reinforcement.

[0009] S5: Use thin iron wire to tie the steel mesh to the main reinforcement.

[0010] S6: Reserve a gap for concrete pouring between the steel mesh and the beam end formwork to ensure a dense seal.

[0011] S7: When pouring high-strength concrete, the steel mesh intercepts the concrete flow as a whole to form a strength interface.

[0012] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The overall structure formed by overlapping and fixing the steel mesh units can withstand the pressure of concrete pouring, avoid the durability defects of inflatable rubber rods and solve the problem of sealing failure caused by insufficient mechanical strength of traditional steel wire mesh. The precise matching of the positioning port and the main reinforcement eliminates the risk of steel bar conflict. This method not only forms a strength interface but also has the function of steel bar positioning, which not only meets the construction needs of different concrete grades at the beam-column nodes, but also avoids the cost increase due to design changes. The process of integrally inserting the steel mesh into the main reinforcement simplifies the construction process, improves the sealing efficiency, and does not require subsequent maintenance. This technical solution effectively overcomes the shortcomings of traditional methods such as many joint quality defects and low construction safety, and realizes the dual function optimization of sealing and positioning.

[0013] Preferably, a further technical solution of the present invention is: Furthermore, the thickness of the steel mesh unit is 1.5-2mm. This thickness design balances structural strength and operability. It can effectively resist the pressure of concrete pouring and is easy to cut and install on site.

[0014] Furthermore, the fixing bolts are M6 ordinary bolts, and the gaskets are 2mm thick steel plates with adjustable lengths. The use of M6 bolts in combination with adjustable gaskets ensures that the steel mesh unit connections are stable and the overlap width is easy to adjust.

[0015] Furthermore, the overlap width of adjacent steel mesh units is not less than 50 mm. The larger overlap area enhances the integrity of the steel mesh as a whole, avoids local stress concentration, and provides sufficient space for bolt fixing.

[0016] Furthermore, the spacing between the thin iron wire ties is no more than 300 mm, and the steel mesh and the main reinforcement are densely tied to prevent displacement during the pouring process and avoid affecting the thickness of the steel bar protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention during construction; Marked in the figure are: fixing bolt 1, gasket 2, steel plate mesh unit 3, positioning hole 4. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0019] A method for beam end concrete sealing and steel bar positioning, characterized by comprising the following steps: S1: Use BIM technology to build a three-dimensional steel bar model to determine the spatial position relationship between each steel bar and the size of the blocking surface.

[0020] S2: Prepare steel plate mesh units 3 according to the size of the sealing surface. There is a partially overlapping overlap area between adjacent steel plate units. Use fixing bolts 1 to pass through the overlap area and lock and fix with gaskets 2 to form a steel plate mesh as a whole with the same size as the sealing surface.

[0021] S3: Based on the three-dimensional model, positioning openings 4 that match the number of steel bars are accurately cut out on the entire steel mesh.

[0022] S4: During the beam reinforcement installation stage, the processed steel plate mesh is inserted into the main reinforcement as a whole so that the positioning opening 4 is aligned with the main reinforcement.

[0023] S5: Use thin iron wire to tie the steel mesh to the main reinforcement.

[0024] S6: Reserve a gap for concrete pouring between the steel mesh and the beam end formwork to ensure a dense seal.

[0025] S7: When pouring high-strength concrete, the steel mesh intercepts the concrete flow as a whole to form a strength interface.

[0026] Furthermore, the thickness of the steel mesh unit 3 is 1.5-2 mm. This thickness design balances structural strength and operability, and can effectively resist the pressure of concrete pouring while being easy to cut and install on site.

[0027] Furthermore, the fixing bolt 1 is an M6 ordinary bolt, and the gasket 2 is a 2mm thick steel plate with adjustable length. The M6 ​​bolt is used in conjunction with the adjustable gasket 2 to ensure that the steel mesh unit 3 is firmly connected and the overlap width is easy to adjust.

[0028] Furthermore, the overlapping width of adjacent steel mesh units 3 is not less than 50 mm. The larger overlapping area enhances the integrity of the steel mesh as a whole, avoids local stress concentration, and provides sufficient space for bolt fixing.

[0029] Furthermore, the spacing between the thin iron wire ties is no more than 300 mm, and the steel mesh and the main reinforcement are densely tied to prevent displacement during the pouring process and avoid affecting the thickness of the steel bar protective layer.

[0030] The overall structure formed by overlapping and fixing the steel mesh units 3 can withstand the pressure of concrete pouring, avoid the durability defects of the inflatable rubber rods and solve the problem of sealing failure caused by insufficient mechanical strength of traditional steel wire mesh. The precise matching of the positioning port 4 and the main reinforcement eliminates the risk of steel bar conflict. This method not only forms a strength interface but also has the function of steel bar positioning, which not only meets the construction requirements of different concrete grades at the beam-column node, but also avoids the cost increase due to design changes. The process of integrally inserting the steel mesh into the main reinforcement simplifies the construction process, improves the sealing efficiency, and does not require subsequent maintenance. This technical solution effectively overcomes the shortcomings of traditional methods such as many joint quality defects and low construction safety, and realizes the dual function optimization of sealing and positioning.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of the present invention.

Claims

1. A method for beam end concrete blocking and reinforcement positioning, characterized by: The steps include: S1: Use BIM technology to build a three-dimensional steel bar model to determine the spatial position relationship between the steel bars and the size of the blocking surface; S2: Prepare steel plate mesh units according to the size of the blocking surface. There is a partial overlap between adjacent steel plate units. Fixing bolts are passed through the overlap area and locked with gaskets to form a steel plate mesh with the same size as the blocking surface. S3: Based on the 3D model, accurately cut out positioning openings on the expanded metal to match the number of steel bars; S4: During the beam reinforcement installation phase, the processed steel plate mesh is inserted into the main reinforcement as a whole, so that the positioning opening is aligned with the main reinforcement; S5: Use thin wire to tie the steel mesh to the main reinforcement; S6: Reserve a gap for concrete pouring between the steel mesh and the beam end formwork to ensure a dense seal; S7: When pouring high-strength concrete, the steel mesh intercepts the concrete flow as a whole to form a strength interface.

2. The method for beam end concrete sealing and steel bar positioning according to claim 1, characterized in that: The thickness of the expanded metal unit is 1.5-2 mm.

3. The method for beam end concrete sealing and steel bar positioning according to claim 1, characterized in that: The fixing bolts are M6 ordinary bolts, and the washers are 2mm thick steel plates with adjustable length.

4. The method for beam end concrete sealing and steel bar positioning according to claim 1, characterized in that: The overlap width of adjacent steel mesh units shall not be less than 50mm.

5. The method for beam end concrete sealing and steel bar positioning according to claim 1, characterized in that: The spacing between thin iron wire ties shall not exceed 300mm.

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