Construction method of structural floor slab bottom constructional column

Abstract

The invention provides a structural floor slab bottom constructional column construction method, and belongs to the technical field of building construction. The method comprises the following steps: (1) vertically and downwards mounting a template matched with a constructional column in section size at the position of the constructional column; (2) implanting steel bars at the top of the constructional column, and synchronously pouring concrete into the top structure of the constructional column and the structural slab; (3) after the building procedure is completed, chiseling treatment is conducted on the section of the lower portion of the constructional column 20 cm away from the lower portion of the structural slab, floating ash and impurities are thoroughly removed, constructional column steel bars are bound immediately, a horn mouth formwork extends upwards along the constructional column, and sufficient pouring space is reserved; and (4) before concrete is poured, the interface is wetted in advance. Through synchronous pouring of the top of the constructional column and the structural slab, the connection tightness of the two is remarkably improved, and the forming quality of the constructional column is guaranteed. Meanwhile, the reserved top steel bars replace a traditional steel bar planting technology, the procedures of drilling, glue injection and the like are reduced, the construction period can be shortened, and double optimization of quality and efficiency is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a construction method for structural columns at the bottom of a structural floor slab. Background Art

[0002] During the current domestic construction of structural columns at the bottom of structural floor slabs, site conditions limit the ability of the reserved bellmouth to maintain a certain distance from the floor slab. Otherwise, concrete pouring will not proceed properly. Under these circumstances, the traditional bellmouth-assisted pouring process struggles to ensure adequate filling and effective vibration of the concrete at the top of the column, easily leading to gaps and holes in the top area, which directly affects the quality of the column's finish.

[0003] When drilling holes for rebar above structural columns, the high floor height makes construction extremely difficult, making it easy for holes to penetrate the floor slab or damage the rebar within. This not only weakens the structural performance of the floor slab but also damages the anchoring foundation for the rebar, directly affecting its pullout resistance and posing a potential structural safety hazard. Summary of the Invention

[0004] In light of this, and to address the technical issues of loosely cast upper portions of structural columns and inconvenient construction operations in existing technologies, the present invention provides a method for constructing structural columns at the base of structural floor slabs. By simultaneously casting the top of the structural column and the structural slab, the connection between the two is significantly improved, ensuring the quality of the structural column. Furthermore, by pre-reserving top reinforcement to replace the traditional rebar planting process, the drilling and glue injection processes are reduced, shortening the construction cycle and achieving dual optimization of quality and efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The construction method of the structural column at the bottom of the structural floor slab includes the following steps:

[0007] Step (1), vertically downwardly installing a template with a cross-sectional size matching the structural column at the structural column position;

[0008] Step (2), implanting the top steel bars of the structural columns, and simultaneously pouring concrete on the top structure of the structural columns and the structural slabs;

[0009] After the masonry process is completed in step (3), the lower section of the structural column 20 cm below the structural plate is roughened to thoroughly remove floating dust and impurities, and then the structural column reinforcement is tied, and the flared template is extended upward along the structural column to reserve sufficient pouring space;

[0010] Step (4): Before pouring concrete, pre-wet the interface.

[0011] Preferably, in step (1), the template height is 20 cm.

[0012] Preferably, in step (2), the top reinforcement of the structural column is implanted, and a 90° hook is set deep into the floor section.

[0013] Preferably, in step (3), the bell-mouth template is extended upward along the structural column by 5 cm.

[0014] Preferably, in step (4), the interface is roughened after being wetted to enhance the bonding strength between the new and old concrete.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) Improve the molding quality of structural columns

[0017] Solve the problem of loose concrete on the top: By pouring concrete on the top of the structural column and the structural slab simultaneously, a rigid connection is achieved in one step, avoiding the hidden danger of joints in secondary pouring in traditional processes, effectively eliminating loose gaps, holes and other loose phenomena in the top area, and significantly improving the density of the concrete on the top of the structural column.

[0018] Enhance the bonding strength between new and old concrete: After masonry, roughen the lower section of the structural column and remove floating dust, moisten the interface before pouring, and enhance the bonding strength between new and old concrete through roughening to ensure the stability and integrity of the structural column and structural slab.

[0019] (2) Optimize construction efficiency

[0020] Reduce complex processes: The use of reserved top steel bars (with 90° hooks) replaces the traditional rebar planting process, eliminating the tedious operations such as drilling and glue injection caused by excessive floor height, and simplifying the construction process.

[0021] Shorten the construction period: By reducing the drilling, glue injection and other processes related to anchor bar planting, the construction progress is effectively accelerated, achieving dual optimization of quality and efficiency.

[0022] (3) Reduce structural safety hazards

[0023] In traditional processes, drilling holes for top rebar can easily penetrate the floor slab or damage the rebar within, potentially weakening the slab's structural performance and affecting the anchoring effectiveness of the rebar. This method replaces rebar with reserved top rebar (with a 90° hook anchor), avoiding structural damage to the floor slab and the rebar foundation caused by drilling, thus fundamentally reducing structural safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a construction diagram of step (1);

[0025] Figure 2 This is a construction diagram of step (2);

[0026] Figure 3 This is a construction diagram of step (3);

[0027] Figure 4 This is a construction diagram of step (4);

[0028] In the figure, 1. Structural plate; 2. Formwork; 3. Top reinforcement of column; 4. Structural column reinforcement; 5. Bell mouth. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1-4 As shown, the present invention provides a method for constructing structural columns at the bottom of a structural floor slab, comprising the following steps:

[0031] Step (1) vertically downwardly installs a template 2 with a cross-sectional size that matches the structural column at the structural column position. Specifically, during the construction of the structural plate 1, the structural column position is precisely located strictly according to the construction drawings. Subsequently, vertically downwardly installs a template 2 with a cross-sectional size that matches the structural column at a height of 20 cm.

[0032] Step (2) implants the top reinforcement 3 of the structural column and simultaneously casts concrete for the top structure of the structural column and the structural slab 1. Specifically, the top reinforcement 3 of the structural column is accurately implanted according to the design specifications, and a 90° hook is set deep into the floor section to enhance the stability of the reinforcement through the hook anchoring. The top structure of the structural column and the structural slab 1 are cast simultaneously, and a rigid connection is achieved by forming concrete in one step, eliminating the hidden dangers of secondary casting joints and improving the density of the top of the structural column.

[0033] Step (3): After the masonry process is completed, the lower cross-section of the structural column 20 cm below the structural plate 1 is roughened to thoroughly remove dust and impurities. Then, the structural column reinforcement 4 is tied, and the flared mouth 5 template 2 is extended upward along the structural column to reserve sufficient casting space. Specifically, it can be as follows: After the masonry process is completed, the lower cross-section of the structural column 20 cm below the structural plate 1 is roughened to thoroughly remove dust and impurities. Then, the structural column reinforcement 4 is tied, and the flared mouth 5 template 2 is extended upward along the structural column to reserve sufficient casting space.

[0034] Step (4): Before pouring concrete, pre-wet the interface and use the roughening process to enhance the bonding strength between the new and old concrete, thereby ensuring the stability and integrity of the structural column and the structural plate 1.

[0035] In summary, the method for constructing structural columns at the bottom of structural floor slabs provided by the present invention significantly improves the tightness of the connection between the top of the structural column and the structural plate 1 by simultaneously pouring the two, thereby ensuring the quality of the structural column molding. At the same time, the reserved top steel bars replace the traditional rebar planting process, reducing the drilling, glue injection and other processes, which can shorten the construction period and achieve dual optimization of quality and efficiency. Compared with the traditional bell mouth 5 auxiliary pouring process, it has obvious advantages.

[0036] The above description is merely a preferred embodiment of the present invention. However, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed in the present invention and who makes equivalent substitutions or modifications based on the technical solution of the present invention and its improved concepts shall be covered by the scope of protection of the present invention.

Claims

1. The construction method of the structural column at the bottom of the structural floor is characterized by: The steps include: Step (1), vertically downwardly installing a template with a cross-sectional size matching the structural column at the structural column position; Step (2), implanting the top steel bars of the structural columns, and simultaneously pouring concrete on the top structure of the structural columns and the structural slabs; After the masonry process is completed in step (3), the lower cross section of the structural column 20 cm below the structural plate is roughened to thoroughly remove floating dust and impurities, and then the structural column reinforcement is tied, and the flared template is extended upward along the structural column to reserve sufficient pouring space; Step (4): Before pouring concrete, pre-wet the interface.

2. The method for constructing structural columns at the bottom of a structural floor according to claim 1, characterized in that: In step (1), the template height is 20 cm.

3. The method for constructing structural columns at the bottom of a structural floor according to claim 1, characterized in that: In step (2), the top reinforcement of the structural column is implanted and a 90° hook is set deep into the floor section.

4. The method for constructing structural columns at the bottom of a structural floor according to claim 1, characterized in that: In step (3), the bell-mouth template is extended 5 cm upward along the structural column.

5. The method for constructing structural columns at the bottom of a structural floor according to any one of claims 1 to 4, characterized in that: In step (4), the interface is roughened after being wetted to enhance the bonding strength between the new and old concrete.

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