Novel prefabricated vertical component protection layer structure

Abstract

The utility model discloses a novel protection layer structure of a prefabricated vertical component, which relates to the field of concrete structure construction, the cross section of the structure is a component main body of a rectangular cylinder, a main framework support is arranged in the component main body, a groove is arranged on the side surface for accommodating a transverse steel bar, a curved surface reed is arranged at the opening of the groove, and U-shaped hooks inclined inwards are arranged at the two ends of the component main body. Materials of the main framework are selected according to the thickness of a vertical component, and a component body is filled with fine aggregate concrete or high-strength mortar. The working mechanism is as follows: firstly prefabricating the tire membrane, installing the main framework and the hook during cast-in-place, and pouring the filler. The structure can effectively avoid many defects caused by the fact that the protective layer is too thick or too thin, and compared with the prior art, the structure has the remarkable beneficial effects of guaranteeing structural stability, preventing steel bar corrosion, improving construction quality and structural performance and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of concrete structure construction, concretely to a novel prefabricated vertical component protective layer structure. BACKGROUND

[0002] In the field of building engineering, concrete structures are widely used in various building projects due to their excellent performance, such as high compressive strength, good durability, and plasticity, becoming one of the important structural forms of modern buildings. With the vigorous development of the construction industry and the continuous improvement of people's requirements for building quality, the construction quality of concrete structures has received unprecedented attention, especially in commercial housing, important public housing, and excellent engineering projects, the standards for the construction quality of concrete structures have become increasingly stringent.

[0003] Vertical components, including shear walls and frame columns, are key components of concrete structures and are commonly used in construction. However, during the construction of vertical components, the control of the protective layer becomes a difficult problem, especially for shear wall structures. From a design perspective, the reinforcement in shear wall structures is typically thin, with diameters of φ8 and φ10, and has a large slenderness ratio. This characteristic makes the conventional protective layer structure unstable after the formwork is sealed, and it is prone to falling or deviation. After subsequent concrete construction processes such as vibration with a vibrating rod and formwork removal, the protective layer frequently fails to meet the requirements.

[0004] Abnormal thickness of the protective layer can cause a series of serious quality defects in concrete wall structures. When the protective layer is too thick, it first weakens the bond between the reinforcement and the concrete, causing stress concentration at the interface between the protective layer and the concrete. Under conditions of temperature changes or concrete drying shrinkage, this stress concentration can easily cause cracks, not only affecting the appearance of the structure but also reducing the overall strength of the structure. At the same time, the over-thick protective layer can also produce internal micro-cracks due to uneven concrete shrinkage, further reducing the structure's resistance to permeability and frost resistance, and shortening the service life of the structure.

[0005] On the contrary, an excessively thin protective layer is also extremely harmful. Insufficient protective layer can expose the reinforcement directly to the external environment, making it vulnerable to moisture, oxygen, and corrosive media, leading to reinforcement corrosion and expansion, which can break through the concrete protective layer and cause cracks along the reinforcement. Reinforcement corrosion can weaken its cross-sectional area, reduce the load-bearing capacity of the structure, and seriously threaten the overall safety of the building. In addition, an excessively thin protective layer can cause the reinforcement to adhere to the formwork, resulting in exposed reinforcement or honeycomb-like voids between the concrete and the reinforcement when the pouring and vibration are insufficient, and causing the concrete around the reinforcement to bear more local stress, accelerating crack propagation and further reducing the durability of the structure.

[0006] Moreover, the uneven thickness of the protective layer will affect the flatness of the wall surface and reduce the appearance quality of the building. When combined with other quality defects, the protective layer problem will also accelerate the carbonation rate of the concrete and speed up the deterioration of the structure.

[0007] In summary, strict control of the thickness of the protective layer is crucial to improve the construction quality of the concrete structure. However, the existing conventional protective layer structure has many deficiencies in practical application and is difficult to meet the growing demand for building quality. Therefore, it is urgent to develop a new type of protective layer structure for prefabricated vertical components, which has important practical significance for solving the control problem of the protective layer and improving the quality of construction engineering. Content of the utility model

[0008] The utility model aims at providing a new type of protective layer structure for prefabricated vertical components, which comprises a main skeleton support component main body, transverse steel bars are introduced through the horn-shaped structure of the groove opening, the groove and the reed do not directly contact the steel bars, a reserved space is provided for filling and wrapping the steel bars with concrete, the U-shaped hook tail ends at both ends are inclined inward, the tail ends are inserted into the main body and connected and fixed with other structures to protect the layer, the position of the steel bars is accurate and not exposed after pouring, the length of the component main body is adapted to the wall thickness or column width, and the internal filling material enhances the structural performance.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0010] A new prefabricated vertical component protection layer structure: including the component body, which is a column with a rectangular cross-section. A main skeleton is vertically passed through the component body, which plays a role in supporting and stabilizing the component body. The side of the component body is provided with a groove with a semicircular bottom, which is used to accommodate the transverse steel bars, and its design is closely related to the arrangement of the transverse steel bars. Curved spring sheets are fixedly installed on both sides of the groove opening, and the curved spring sheets on both sides form a narrow-in-the-middle and wide-outside horn-shaped opening at the groove opening, and are surrounded by the semicircular groove bottom to form an approximate circular shape. The working mechanism of this structure design is that when the transverse steel bars are inserted into the groove, the narrow-in-the-middle and wide-outside horn-shaped opening facilitates the insertion of the steel bars. After insertion, the curved spring sheets and the semicircular groove bottom reserve a certain space for the steel bars, and during subsequent pouring of concrete, the concrete can fully fill the space and tightly wrap the steel bars, which ensures the position accuracy of the steel bars in the component, ensures that the steel bars are tightly wrapped by the concrete after pouring, and will not be exposed to the outside. Hooks are arranged at both ends of the component body, and the tail end of the hook is inserted into the inside of the component body. The hook is mainly used for connecting with other structural parts, and the design of the hook towards the inside can better form a stable pull with the surrounding structure. During the installation of the component, the protection layer structure can be firmly fixed at the predetermined position through the connection of the hook and other structures, which ensures the stability of the entire vertical component during construction and use, and further ensures that the protection layer structure will not be displaced during pouring, and ensures that the transverse steel bars are accurately wrapped in the designed position, avoiding the exposure of the steel bars after pouring.

[0011] The length of the component body is determined according to the wall thickness or column width. This is to enable the protection layer structure to adapt to wall bodies or column bodies of different size specifications. In actual application, the length of the component body is accurately determined according to the specific architectural design requirements to achieve the best protection effect and structural adaptability. The appropriate length can ensure that the transverse steel bars are effectively covered by the protection layer structure at all positions during the wrapping of the transverse steel bars and pouring, whether it is a wall body or a column body, to prevent the steel bars from being exposed to the outside after pouring.

[0012] The main skeleton adopts φ4 cold-drawn wire, and when the thickness of the vertical component is not greater than 200mm, the main skeleton can adopt 20# wire, and the main skeleton puller uses 22# or 20# wire. φ4 cold-drawn wire is selected as the main skeleton material because it has high strength and good flexibility, which can meet the support requirements of the component body. When the thickness of the vertical component is small, 20# wire is used as the main skeleton to reduce costs while ensuring the strength of the structure. The main skeleton puller uses 22# or 20# wire to ensure the firmness of the puller connection, so that the parts of the main skeleton are tightly combined, the stability of the entire main skeleton system is enhanced, and the reliability of the protection layer structure is ensured. A stable and reliable main skeleton can ensure that the protection layer structure does not deform or damage during the wrapping of the transverse steel bars and the subsequent pouring process, and ensure that the transverse steel bars are always wrapped in the structure and will not be exposed after pouring.

[0013] The component body uses fine stone concrete or high-strength mortar as a filler. The fine stone concrete or high-strength mortar has good filling and bonding properties, is filled in the interior of the component body, can tightly combine the main framework and the external structure into a whole, improves the compression resistance and crack resistance of the component body, effectively protects the main framework and other structural components in the interior, and prolongs the service life of the entire vertical component.

[0014] The number of grooves is determined according to the transverse steel bars, and the diameter of the semicircle at the groove bottom is greater than the diameter of the transverse steel bars. The number of grooves is determined according to the number and arrangement of the transverse steel bars, so that each transverse steel bar has a corresponding installation position and precise matching is achieved. The diameter of the semicircle at the groove bottom is greater than the diameter of the transverse steel bars, which facilitates the smooth installation of the transverse steel bars into the grooves, and after installation, there is a certain gap between the steel bars and the groove walls, which can avoid installation difficulties caused by too close size of the steel bars and the grooves, and can allow the steel bars to have a small position adjustment space to a certain extent, ensuring installation accuracy and construction convenience. Such a design can ensure that each transverse steel bar can be accurately wrapped in the protective layer structure during subsequent pouring, and the steel bars will not be exposed to the outside after pouring due to installation problems.

[0015] The hook is in a U-shaped structure, and the tail end penetrates into the interior of the component body. The hook in the U-shaped structure has good pulling performance, the tail end penetrates into the interior of the component body, and forms a firm and integrated connection with the component body. When connected with other structural components, the U-shaped hook can provide stable pulling force to ensure the connection strength between the protective layer structure and other structures, so that the structure connection of the entire vertical component is more stable and reliable. Stable connection can prevent displacement or loosening between the protective layer structure and other structures during pouring, so as to ensure that the transverse steel bars are completely wrapped in the interior of the poured concrete.

[0016] The working mechanism of the new prefabricated vertical component protection layer structure is as follows: the length and width of the prefabricated part are determined according to the design drawing by comprehensively considering the wall and column conditions, a wooden mold or a thin steel plate is selected to make a mold membrane, and a groove larger than the transverse steel bar is arranged. When pouring, the main skeleton and the lower hook are arranged in the completed mold, then the fine stone concrete or high-grade mortar is poured and cured, and the mold is removed. During work, the main skeleton supports the main body of the component, ensuring the stability of the structure. The transverse steel bar is smoothly introduced through the narrow-in-the-middle and wide-outside horn-shaped structure of the groove opening, and after being introduced, the reed does not directly contact the groove semicircular groove bottom, leaving space for subsequent pouring, and when pouring, the concrete fills the space to tightly wrap the steel bar, ensuring the position accuracy of the steel bar and avoiding steel bar corrosion. The tail end of the U-shaped hook at both ends of the component main body penetrates into the inside of the main body, and is connected with other structural parts during installation, firmly fixing the protection layer structure, preventing the structure from shifting or loosening during pouring, ensuring that the transverse steel bar is accurately wrapped at the designed position and is not exposed to the outside, and at the same time, the length of the component main body is adapted to the wall thickness or column width, the internal filling material enhances the structural performance, and the transverse steel bar of the vertical component is effectively protected in all directions.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] The main skeleton is reasonably selected according to the thickness of the vertical component, 20# wire is used when the thickness of the vertical component is not greater than 200mm, the stability of the structure is ensured, and the deformation and thickening of the protection layer structure caused by unreasonable main skeleton are prevented. Moreover, during pouring, the hook is stably connected with other structures, the position of the protection layer structure is accurate, local over-thickening of the protection layer caused by structure displacement is avoided, and the cracking risk and durability reduction problem caused by over-thickening of the protection layer are reduced.

[0019] For the defect of over-thin protection layer, the steel bar is prone to corrosion, exposed reinforcement, honeycomb and stress concentration due to insufficient protection layer in the prior art. The groove and curved reed design of the new structure facilitate the accurate introduction of the transverse steel bar, and the reserved space is filled with concrete after the introduction, ensuring the accurate installation position of the steel bar and preventing the steel bar from being close to the formwork due to installation deviation, which causes the protection layer to be too thin. At the same time, direct contact between the steel bar and the reed and the groove bottom is avoided to prevent corrosion, and the protection layer is prevented from being broken by the expansion of the steel bar due to corrosion. The hook firmly fixes the protection layer structure, prevents the steel bar from shifting due to loosening of the structure during vibration, ensures that the steel bar is always at the designed position during pouring and vibration, the surrounding concrete is evenly wrapped, the exposed reinforcement and honeycomb phenomenon are avoided, the local stress concentration of the concrete around the steel bar is reduced, and the durability and safety of the structure are effectively improved.

[0020] In existing technologies, uneven protective layer thickness affects the flatness of the wall surface and, when combined with other quality defects, accelerates structural deterioration. The new structure employs a precise prefabrication and cast-in-place process, with strict control over every step, from formwork fabrication to matching the main component length to wall thickness or column width, to the stable support of the main frame, precise matching of grooves to horizontal reinforcing bars, and hooks to secure the structure. This ensures a high degree of uniformity in the protective layer thickness, avoiding poor wall surface flatness. Furthermore, by effectively controlling the protective layer thickness, the possibility of interaction with other quality defects is reduced, slowing down concrete carbonation and preventing accelerated structural deterioration. This comprehensively improves the quality of concrete construction, effectively guaranteeing the mechanical properties, durability, and appearance quality of the entire vertical component. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a novel prefabricated vertical component protective layer structure according to the present invention;

[0022] In the diagram: 1. Main component; 2. Main frame; 3. Groove; 31. Curved spring; 4. Hook. Detailed Implementation

[0023] The technical solutions of the present invention will now be described in detail with reference to the accompanying drawings of the embodiments.

[0024] like Figure 1 As shown, a novel prefabricated vertical component protective layer structure includes a component body 1. The component body 1 is a column with a rectangular cross-section. Several main skeletons 2 pass through the component body 1 perpendicular to its cross-section. A groove 3 with a semi-circular bottom is opened on the side of the component body 1. Curved spring plates 31 are fixedly installed on both sides of the opening of the groove 3. The curved spring plates 31 on both sides form a trumpet-shaped opening that is narrow in the middle and wide at the outer edge of the groove 3, and together with the semi-circular bottom of the groove 3, they enclose an approximately circular shape. Hooks 4 are provided at both ends of the component body 1, with their tail ends penetrating into the interior of the component body 1.

[0025] The length of the main body 1 of the component is determined according to the wall thickness or column width.

[0026] The main frame uses φ4 cold-drawn wire. When the thickness of the vertical component is no more than 200mm, the main frame can use 20# tie wire, and the main frame buckle uses 22# or 20# tie wire.

[0027] The main body 1 of the component uses fine stone concrete or high-strength mortar as filler.

[0028] The number of grooves 3 is determined by the transverse reinforcing bars, and the diameter of the semi-circular bottom of the groove 3 is larger than the diameter of the transverse reinforcing bars.

[0029] The hook 4 is a U-shaped structure, the tail end of which penetrates into the inside of the member body 1.

[0030] In the implementation of this new prefabricated vertical member protection layer structure, first of all, according to the design drawings, the length and width of the prefabricated part are determined by comprehensively considering the wall and column conditions. The protection layer component mold is made, and wood mold can be selected from the perspective of cost and reuse. If high efficiency and high quality molding are pursued, thin steel plate is used, the height of the mold is set to be consistent with the width, and a groove 3 larger than the design transverse steel bar is set on the side of the member body 1. After completing the mold making, enter the cast-in-place segment, set the main skeleton 2 and the lower hook 4 in the mold, use the stirrup to assist installation, then pour fine stone concrete or high-grade mortar into the mold, after filling, maintenance is carried out, and after reaching a certain strength, the mold is removed, and the whole protection layer structure is completed. Then, the transverse steel bar is introduced through the narrow inside wide outside horn-shaped structure of the groove 3 opening, at this time the curved spring sheet 31 does not directly contact the steel bar with the semicircular groove bottom of the groove 3, the reserved space facilitates subsequent pouring of concrete to fully fill and tightly wrap the steel bar. Finally, the U-shaped hook 4 at both ends of the member body 1 is obliquely inward and the tail end penetrates into the inside of the body, which is connected with other structural components during installation, firmly fixing the protection layer structure, ensuring that the protection layer structure will not displace or loosen during the concrete construction vibration process, and ensuring that the transverse steel bar is always in the designed position and is precisely wrapped inside the concrete.

Claims

1. A new prefabricated vertical structural member protection layer structure comprising a member body (1), characterized in that, The component body (1) is a rectangular column in cross section, a plurality of main skeletons (2) are vertically passed in the component body (1) and perpendicular to the cross section, a groove (3) with a semicircular groove bottom is formed on the side surface of the component body (1), the curved spring blades (31) are fixedly installed on the two sides of the opening of the groove (3), the two curved spring blades (31) form a horn-shaped opening with a narrow middle and a wide outside at the opening of the groove (3) and are approximately circular together with the semicircular groove bottom of the groove (3); the hooks (4) are arranged at the two ends of the component body (1) and are inclined to the inside, and the tail ends of the hooks (4) penetrate into the inside of the component body (1).

2. A novel precast vertical member protective layer structure according to claim 1, characterized in that, The length of the component body (1) is determined according to the wall thickness or the column width.

3. A novel precast vertical member protective layer structure according to claim 1, characterized in that, The main skeleton adopts a cold-drawn wire with a diameter of φ4, when the thickness of the vertical component is not greater than 200 mm, the main skeleton can adopt a 20# wire; the main skeleton puller uses a 22# or 20# wire.

4. A novel precast vertical member protective layer structure according to claim 1, characterized in that, The component body (1) uses fine stone concrete or high-strength mortar as the filling material.

5. A novel precast vertical member protective layer structure according to claim 1, characterized in that, The number of the grooves (3) is determined according to the transverse steel bars, and the diameter of the semicircular groove bottom of the groove (3) is greater than the diameter of the transverse steel bar.

6. A novel precast vertical member protective layer structure according to claim 1, characterized in that, The hook (4) is a U-shaped structure, and the tail end of the hook (4) penetrates into the inside of the component body (1).

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