Steel member protection structure pouring template during staged implementation of structural column

Abstract

The utility model relates to the technical field of structural engineering construction, in particular to a steel member protection structure pouring formwork during staged implementation of structural columns, which is formed by splicing L-shaped formworks and vertical bar formworks, the L-shaped formworks serve as corner formworks, the corresponding L-shaped formworks are connected through the vertical bar formworks serving as middle formworks, and the vertical bar formworks serve as middle formworks. Therefore, the plurality of L-shaped templates and the plurality of vertical strip templates are connected to form a pouring space for pouring a protective layer. The utility model has the advantages that through different combinations, the device can be quickly assembled to be suitable for various column section sizes, can be recycled in blocks, and is efficient and economical; the device is simple and reasonable in structure, convenient to use and suitable for popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of structural engineering construction, in particular to a steel component protection structure casting template when a structural column is implemented in stages. Background Art

[0002] The general implementation process for integrated property development projects above rolling stock bases is as follows: Construction of the platform is completed simultaneously with rail transit construction. The completed platform land enters the market through land transfer procedures, and secondary developers undertake integrated property development. This results in discontinuous construction between the above- and below-ground construction. Given the unique and systematic nature of development, it is subject to numerous external factors, resulting in uncertain development times.

[0003] In order to reserve greater flexibility for the development plan of the cover, usually only one platform is constructed during rail transit construction, and the second platform is implemented together with the cover property. The vertical components reserved for the cover platform are mostly conversion components or bear various loads such as the cover soil, landscape, etc., with large cross-sections and a lot of reinforcement.

[0004] In the process of promoting such projects, when phased development or batch implementation occurs and on-site construction cannot be completed continuously vertically, the steel bars of concrete columns or the steel-concrete columns and the steel sections need to be reserved for extension according to the force and structure. For phased construction situations such as cover development, where the overall number is large, the cross-section of individual components is large, and there is a lot of reinforcement, protection measures for reserved steel bars or steel sections are very important. In the short term, measures should be taken to protect the reserved steel bars or steel sections from rusting. In the long term, during construction, the steel bars or steel sections should be connected upward according to the structural requirements, and then concrete should be poured to form a vertical load-bearing component that is connected from top to bottom and transmits force smoothly. The short-term protection measures for the reserved steel bars and steel sections are only to isolate them from air corrosion, and they do not bear loads.

[0005] At present, the commonly used engineering practice is to cast low-grade concrete across the entire section. This approach is indeed helpful in preventing steel bars from rusting during the construction window period. However, during construction, due to certain requirements for the thickness of the concrete protective layer, it is necessary to customize templates of different sizes. However, this results in a low utilization rate of the templates and additional waste of production and construction resources. Summary of the Invention

[0006] The purpose of the utility model is to provide a steel component protection structure casting template when the structural column is implemented in stages based on the above-mentioned shortcomings of the existing technology. Low-grade concrete or foam concrete can be conveniently cast around the reserved steel bars to form casting protection layers of different sizes, which can be used for various construction conditions.

[0007] The purpose of this utility model is achieved by the following technical solutions:

[0008] A casting template for a steel component protection structure when structural columns are implemented in stages is used to protect steel components reserved in future structural columns. The steel components extend out from the top surface of the future structural columns being cast this time. The invention is characterized in that the casting template is assembled from an L-shaped template and a vertical bar template, wherein the L-shaped template serves as a corner template, and the corresponding L-shaped templates are connected by a vertical bar template serving as an intermediate template, so that a plurality of L-shaped templates and a plurality of the vertical bar templates are connected to form a casting space for casting a protective layer.

[0009] Short wooden supports are provided between the vertical formworks on opposite sides for top support reinforcement.

[0010] The inner and outer layers of templates are formed by assembling the L-shaped templates and the vertical strip templates of different sizes, and the space between the inner and outer layers of templates is the pouring space for the pouring protective layer.

[0011] A circular casting space is formed by assembling and fitting a plurality of the vertical templates.

[0012] The advantages of the utility model are that it can be quickly assembled into blocks suitable for various column section sizes through different combinations, and can be recycled in blocks, which is efficient and economical; the structure is simple and reasonable, easy to use, and suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0014] Figure 2 Two cross-sectional schematic diagrams of the first embodiment of the present utility model;

[0015] Figure 3 This is a schematic structural diagram of a template device for pouring a protective layer in accordance with the first embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of the first embodiment of the present utility model when it is dismantled;

[0017] Figure 5 This is a schematic structural diagram of the second embodiment provided by the present utility model;

[0018] Figure 6 This is a cross-sectional schematic diagram of the second embodiment of the present utility model;

[0019] Figure 7 This is a schematic structural diagram of a template device for pouring a protective layer in the second embodiment of the present utility model;

[0020] Figure 8 This is a schematic diagram of the structure of the second embodiment of the present invention when it is dismantled. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0022] like Figure 1-8 As shown in the figure, numbers 1-17 respectively represent: long-term structural column 1 for this casting, permanent stirrups 2, reserved longitudinal reinforcement 3, reserved longitudinal reinforcement 4, polyethylene foam steel bar protective cover 5, plastic board inner formwork 6, L-shaped formwork 7, vertical bar formwork 8, short wooden support 9, low-grade concrete or foam concrete 10, rainproof protective cover 11, steel section 12, reserved permanent reinforcement 13, permanent concrete 14, flange inter-formwork 15, embedded bolts 16, and cutting position of temporary concrete cover 17.

[0023] Example 1: Figures 1 to 4 As shown, in this embodiment, when the structural columns are implemented in stages, the steel member protection structure casting template is used for the short-term protection of the steel bars of the reinforced concrete frame columns. The specific implementation method is as follows:

[0024] A future structural column 1 will be cast at a height h1 above the recently constructed structural surface elevation. The height of this future structural column 1 will comply with specifications and atlas requirements. The column cross-section, stirrups, concrete grade, and construction requirements for this height range are the same as those for future permanent structural columns. A protective layer of distributed reinforcement greater than 50mm is recommended for this future structural column 1 at height h1.

[0025] During this pour, the reserved longitudinal reinforcement is staggered and cut at a certain height h2 above the height of the future structural column 1. The first batch of steel bars is cut approximately 200mm above h1 to serve as reserved longitudinal reinforcement 3 (joint area percentage ≤ 50%), facilitating future mechanical connection of the reinforcement. The second batch of steel bars is cut approximately 200mm below h2 to serve as reserved longitudinal reinforcement 4.

[0026] Within the height range h2, the longitudinal reinforcements distributed around (reserved longitudinal reinforcements 3 and 4) are wrapped with polyethylene foam steel bar protective sleeves 5 to provide the first layer of protection for the longitudinal reinforcements. Plastic board inner formwork 6 is erected on both sides of the polyethylene foam steel bar protective sleeves 5. Figure 2 As shown, the plastic board inner formwork 6 is entirely enclosed around the periphery of each longitudinal reinforcement to form a second layer of protection. When in use, the plastic board inner formwork 6 also serves as a formwork for the subsequent concrete pouring protective layer. The thickness of the plastic board inner formwork 6 is preferably 20-30 mm.

[0027] Within the height range of h2, the templates are supported on the inner and outer sides of the reserved longitudinal reinforcement 3 and the reserved longitudinal reinforcement 4. The structure of the template is as follows Figure 3 shown.

[0028] like Figure 3As shown in the left figure, for a rectangular column, the outer formwork for the longitudinal reinforcement consists of four corner forms and several intermediate forms. The four corner forms are L-shaped forms 7, preferably with a length of 500-1000mm; the intermediate forms are vertical strip forms 8, preferably with a width of 300-500mm. L-shaped forms 7 and vertical strip forms 8 of varying sizes are combined to form the outer formwork that meets the requirements of the column cross-section. The inner formwork also consists of four corner forms and several intermediate vertical strip forms, and the combined dimensions meet the requirements for forming a protective casting layer.

[0029] like Figure 3 As shown in the right figure, for a circular cross-section column, a number of vertical strip templates 8 can be fitted to form the inner and outer layer templates. In some cases, steel templates can also be used.

[0030] In this embodiment, the outer template adopts a conventional fixing scheme, and the inner template can be reinforced by arranging a cross short wooden support 9 inside. If necessary, the plastic board inner template 6 can be further fixed with a short support between it and the template.

[0031] Low-grade concrete or foam concrete 10 or other easily removable casting materials are poured between the inner and outer formworks and the plastic board inner formwork 6. After the low-grade concrete or foam concrete 10 is dense and reaches the age, the formwork is removed, and a casting protective layer is formed on the inner and outer sides of the plastic board inner formwork 6 to provide three-layer protection for the reserved longitudinal reinforcement.

[0032] The formwork will be removed after the reserved longitudinal reinforcement protective layer concrete (cast protective layer) reaches the age.

[0033] A plastic or aluminum rain cover 11 is placed on top of the cast protective layer to prevent rainwater from entering the column. During construction, bolts are embedded in the cast protective layer around the longitudinal reinforcement at a certain distance within the protective layer range on top of the longitudinal reinforcement to facilitate the fixing and installation of the rain cover 11 by bolts.

[0034] Example 2: This example differs from Example 1 in that: Figures 4 to 8 As shown, this embodiment is applied to the short-term protection of steel and steel bars of steel-concrete frame columns. The main differences between its specific implementation method and the first embodiment are as follows:

[0035] Within the reserved height of the steel section 12, concrete is poured inside the flange of the steel section 12 according to the concrete grade and construction requirements of the permanent structure. Depending on the configuration of the column stirrups, whether to install reserved permanent stirrups 13 inside the steel section is determined. Anti-corrosion treatment is applied to the outer side of the flange of the steel section 12. Afterwards, permanent concrete 14 is poured inside the steel section 12.

[0036] In this embodiment, the permanent concrete 14 is poured by arranging inter-flange formwork 15 between the steel sections 12 to enclose a pouring space for the permanent concrete 14 .

[0037] During demolition, the anti-corrosion protective layer on the outside of the flange of steel section 12 is removed; longitudinal reinforcement is extended according to the permanent structure, steel sections and studs are welded, stirrups are installed, and concrete is poured.

[0038] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A steel member protection structure casting template for the phased implementation of structural columns, used to protect steel members reserved in future structural columns, wherein the steel members extend beyond the top surface of the future structural columns being cast, characterized in that: The casting template is composed of an L-shaped template and a vertical bar template, wherein the L-shaped template serves as a corner template, and the corresponding L-shaped templates are connected by a vertical bar template serving as an intermediate template, so that several L-shaped templates and several vertical bar templates are connected to form a casting space for casting the protective layer.

2. The steel component protection structure casting template for the phased implementation of structural columns according to claim 1 is characterized by: Short wooden supports are provided between the vertical formworks on opposite sides for top support reinforcement.

3. The steel component protection structure casting template for the phased implementation of structural columns according to claim 1 is characterized by: The inner and outer layers of templates are formed by assembling the L-shaped templates and the vertical strip templates of different sizes, and the space between the inner and outer layers of templates is the pouring space for the pouring protective layer.

4. The steel component protection structure casting template for phased implementation of structural columns according to claim 1 is characterized by: A circular casting space is formed by assembling and fitting a plurality of the vertical templates.

Images