A type of formwork-free secondary structural column

Abstract

This utility model discloses a formwork-free secondary structural column, aiming to solve the problems of complex procedures, high costs, difficult quality control, and long construction cycles in traditional structural column construction. The core of this structural column is assembled by alternating stacks of factory-prefabricated standard sections and extension sections. Both types of components are rectangular hollow structures made of concrete, forming a hollow box inside. The upper part has a splicing guide groove, and the lower part has a matching splicing groove. Extension sections have extension segments at both ends, and both types of components have transverse tie bar grooves on the upper and / or lower parts. During construction, the sections are stacked in the order of "standard section - extension section - standard section," positioned by the splicing guide groove and the groove. The extension segments extend into the wall, and the tie bars are embedded in the tie bar grooves with both ends extending into the wall. Then, the steel reinforcement frame is placed into the hollow box, and concrete is poured to form a complete structural column. This utility model eliminates the formwork erection and dismantling process and is applicable to the construction of secondary structures in various buildings.

Description

Technical Field

[0001] This utility model relates to the field of building construction, specifically to a formwork-free secondary structural column. Background Technology

[0002] In the field of building construction, secondary structural columns are components that enhance wall stability and transfer loads. The traditional construction process for structural columns, which is currently widely used in the industry, requires multiple core procedures such as formwork erection, rebar tying, concrete pouring, and formwork removal. This process has the following problems:

[0003] (1) High complexity of procedures. In traditional processes, formwork engineering requires the sequential completion of operations such as material cutting, on-site assembly, positioning and calibration, and support erection. The process involves many steps and is prone to formwork displacement and deformation.

[0004] (2) High material waste and labor costs. The formwork is mostly made of plywood or bamboo plywood. These materials are prone to cracking and deformation due to wear and moisture after a single use. They usually need to be scrapped after only 3-5 uses, resulting in huge consumption of wood. At the same time, the formwork erection and dismantling processes require special construction teams, resulting in low labor efficiency.

[0005] (3) The construction period is long and affects subsequent procedures. After the concrete is poured, it is necessary to wait for its strength to reach more than 75% of the design value before the formwork can be removed, which takes 7-10 days under normal temperature conditions. After the formwork is removed, the surface of the structural column also needs to be roughened and cleaned, and the overall process is slow.

[0006] Furthermore, although improved processes have emerged in the market, problems still exist:

[0007] (1) The improved process adopts the modular prefabricated structural column technology. Due to size limitations, the components are usually 200mm×200mm×200mm or larger. If precast concrete is used, the weight will be too large and it will be difficult to handle manually. If lightweight materials are used instead, the strength will be insufficient. Moreover, the components are connected by masonry mortar, and the steel bars are only inserted through the reserved holes. The overall integrity is poor and the seismic performance is difficult to meet the design requirements of high-rise residential buildings.

[0008] (2) Some processes use aerated concrete blocks with formwork-free block technology. The connection between the tie bars and the wall can only be achieved through staggered joint construction, which cannot form a traditional toothed joint structure and has low lateral tie strength. At the same time, there are many right-angle dead corners on the inside of the block. When pouring concrete, the vibrator cannot penetrate deep and it is easy to form a "blind area" that is not vibrated and compacted.

[0009] In summary, the shortcomings of existing processes in terms of efficiency, cost, and quality can no longer meet the current comprehensive needs of the construction industry for green construction, efficient construction, and quality control. There is a need for a formwork-free structural column technology that can simplify procedures, reduce costs, and ensure quality. Utility Model Content

[0010] To address the aforementioned shortcomings of existing technologies, this utility model employs a method of alternating stacking of hollow standard sections and extension sections, along with the addition of a steel reinforcement frame, to achieve rapid construction of high-quality secondary structural columns without the need for formwork.

[0011] This utility model proposes a formwork-free secondary structural column, which is composed of standard sections and extension sections stacked alternately; both the standard sections and the extension sections are rectangular hollow structures with openings at the top and bottom, forming a hollow box inside; the extension sections have extension sections at both ends near the wall that can extend into the wall.

[0012] Preferably, it also includes a steel reinforcement frame that runs through the hollow box, the steel reinforcement frame being made of vertical steel bars and horizontal stirrups tied together.

[0013] Preferably, both the standard section and the extension section are provided with splicing guide grooves on their upper parts and splicing grooves matching the splicing guide grooves on their lower parts.

[0014] Preferably, the upper and / or lower parts of the standard section and the extension section are provided with tie bar grooves, and tie bars can be embedded in the tie bar grooves, with both ends of the tie bars extending into the wall.

[0015] Preferably, the splicing guide groove is arranged parallel to the tie bar groove.

[0016] This utility model has the following beneficial effects:

[0017] (1) The construction process is greatly simplified and the construction efficiency is improved. The formwork dismantling process is eliminated. The components adopt standard sections and extension sections prefabricated in the factory. On site, it is only necessary to stack them alternately in the order of "standard section-extension section-standard section". The positioning is completed by the precise fitting of the splicing guide groove and the groove. There is no need to wait for the concrete strength to reach more than 75% before the subsequent process can be carried out. Moreover, the stacking of components and the installation of tie bars are carried out at the same time, and the overall secondary structure construction cycle is shortened.

[0018] (2) Reduce overall costs and achieve economic optimization. Traditional formwork is eliminated, eliminating the need for specialized formwork support / dismantling teams. Ordinary construction workers can operate the system after simple training, reducing labor costs per structural column. Precast components can be produced in factories in a standardized manner, ensuring stable molding quality. They can also be constructed simultaneously with the primary structure, replacing some post-pouring strips or back-support in the construction area, saving on back-support material rental and erection labor costs.

[0019] (3) Strengthen the connection strength between the component and the wall. The extension section of the extension segment is physically embedded in the wall. Combined with the tie bars extending laterally into the wall in the tie bar groove, a double fixation of "embedding + tie" is formed, which increases the lateral tie strength. The steel frame can be placed into the hollow box as a whole and combined with the on-site concrete pouring. The integrity of the component and the seismic performance meet the high requirements.

[0020] The formwork-free secondary structure column provided by this utility model achieves innovation from multiple dimensions such as process optimization, cost control, quality assurance, safety and environmental protection. Attached Figure Description

[0021] Figure 1 This is a perspective view of the structural column in an embodiment of the present utility model;

[0022] Figure 2 This invention relates to a steel reinforcement frame in the middle of a structural column.

[0023] Figure 3 This is a standard section for embodiments of this utility model;

[0024] Figure 4 This is an elongation section according to an embodiment of the present utility model.

[0025] 1-Standard section; 2-Extension section; 3-Splicing guide groove; 4-Hollow box; 5-Tie bar groove; 6-Tie bar; 7-Extension section; 8-Reinforcing bar frame; 9-Vertical reinforcing bar; 10-Horizontal stirrup. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The formwork-free secondary structural column provided in this embodiment of the utility model, such as... Figures 1-4 As shown, the structural column is assembled from standard section 1 and extension section 2 in an alternating stacking manner, and the overall structure takes into account both stability and ease of construction.

[0028] Both standard section 1 and extension section 2 are rectangular structures, and both are precast concrete, ensuring the strength of the components themselves while also forming a good bond with the subsequently poured concrete. The two ends of extension section 2 closest to the wall are designed as extension structures, forming extension segments 7. During assembly, extension segments 7 need to extend into the interior of the walls on both sides, enhancing the connection and tightness between the structural column and the wall through physical interlocking, avoiding the problem of loose connections between components and walls in traditional processes.

[0029] To achieve precise stacking and fixing of standard section 1 and extension section 2, splicing guide grooves 3 are provided on the upper part of both types of components, and corresponding splicing grooves are provided on the lower part to match the splicing guide grooves 3. When performing alternating stacking operations, the splicing groove of the upper component can precisely fit into the splicing guide groove 3 of the lower component, and the initial fixing of the upper and lower sections can be completed without the need for additional support tools, greatly simplifying the positioning process.

[0030] Both standard section 1 and extension section 2 are designed as hollow structures with openings at the top and bottom, forming a hollow box 4 inside. The core function of this hollow box 4 is to accommodate the steel reinforcement frame 8 and provide space for concrete pouring. The steel reinforcement frame 8 is made of vertical steel bars 9 and horizontal stirrups 10 tied together according to building structural codes. During construction, the steel reinforcement frame 8 must first be placed inside the hollow box 4 as a whole, and then concrete must be poured into the box to form a cohesive structure of steel bars and concrete, ensuring the load-bearing capacity of the structural column.

[0031] To further enhance the lateral connection between the structural column and the wall, tie bar grooves 5 are laterally formed at the upper and / or lower parts of standard section 1 and extended section 2. These tie bar grooves 5 can be set parallel to the splicing guide groove 3 to ensure the regularity of the component structure. The splicing guide groove 3 can also be set perpendicular to the tie bar groove 5. During construction, tie bars 6 are embedded in the tie bar grooves 5, and both ends of the tie bars 6 need to extend laterally into the interior of the walls on both sides. Through the tensile force of the tie bars 6, the overall connection strength between the structural column and the wall is further improved, preventing relative displacement between the wall and the structural column.

[0032] Assembly and construction shall be carried out in accordance with the following process:

[0033] (1) Preliminary preparation: Based on the construction floor height and structural column design dimensions, prefabricate standard section 1 and extension section 2 of corresponding specifications, and tie the steel frame 8 consisting of vertical steel bars 9 and horizontal stirrups 10, and prepare tie bars 6.

[0034] (2) Component stacking: First, place the first component (standard section or extension section) in the designated position, and then stack the subsequent components in the alternating order of "standard section 1-extension section 2-standard section 1". When stacking, ensure that the splicing groove of the previous component is fully fitted with the splicing guide groove 3 of the next component, and at the same time ensure that the extension section 7 of extension section 2 is accurately inserted into the walls on both sides.

[0035] (3) Installation of tie bars: During the stacking of components, tie bars 6 are simultaneously embedded into the tie bar grooves 5 of each component, and the two ends of tie bars 6 are extended into the reserved holes in the wall to complete the horizontal tie fixing.

[0036] (4) Construction of steel reinforcement frame and concrete: After all components are stacked and tie bars are installed, the steel reinforcement frame 8 is placed inside the hollow box 4 as a whole. After checking that the position is correct, concrete is poured into the hollow box 4 until the concrete fills the box and reaches the design strength, thus forming a complete formwork-free secondary structure column.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A formwork-free secondary structural column, characterized in that, It is composed of standard sections (1) and extension sections (2) stacked alternately; both standard sections (1) and extension sections (2) are rectangular hollow structures with openings at the top and bottom, forming a hollow box (4) inside. The extension sections (2) have extension sections (7) that can extend into the wall at both ends near the wall.

2. The formwork-free secondary structural column according to claim 1, characterized in that, It also includes a steel reinforcement frame (8) that runs through the hollow box (4), the steel reinforcement frame (8) being made of vertical steel bars (9) and horizontal stirrups (10).

3. The formwork-free secondary structural column according to claim 1, characterized in that, Both the standard section (1) and the extension section (2) are provided with splicing guide grooves (3) on the upper part and splicing grooves (3) matching the splicing guide grooves (3) on the lower part.

4. The formwork-free secondary structural column according to claim 3, characterized in that, The standard section (1) and the extension section (2) are provided with tie bar grooves (5) on the upper and / or lower parts, and tie bars (6) can be embedded in the tie bar grooves (5), with both ends of the tie bars (6) extending into the wall.

5. The formwork-free secondary structural column according to claim 4, characterized in that, The splicing guide groove (3) is arranged in parallel with the tie bar groove (5).

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