Reinforced concrete columns with assembled precast steel cages and formwork and construction methods

Abstract

This invention provides a prefabricated reinforced concrete column with assembled steel cages and formwork, and a construction method thereof. The reinforced concrete column includes at least two steel cages, a connecting cage, a connecting ring plate, and a profiled steel sheet frame. The longitudinal bars and stirrups of the steel cages are connected by welding. All contact points of the longitudinal bars and stirrups of the steel cage are welded together, allowing the steel cage to bear force independently and provide support for the formwork. The steel cage and formwork of the reinforced concrete column are prefabricated in the factory as a whole, and can be directly poured after hoisting into place on site, making construction convenient and quick. The upper and lower reinforced concrete columns are assembled in multiple sections. The prefabricated steel cage is easy to transport and hoist during construction, eliminating the need for on-site steel reinforcement tying, further facilitating construction.

Description

Technical Field

[0001] This invention relates to the field of building technology, and more specifically, to a precast precast steel cage and formwork reinforced concrete column and its construction method. Background Technology

[0002] Reinforced concrete columns are suitable for various building structures, possessing numerous advantages such as high load-bearing capacity, good fire and corrosion resistance, and low cost, playing a vital role in engineering structures. However, compared to columns in other structures, they have a larger number of rebar tying points, making construction more complex. Especially during upper-level construction, it is necessary to re-tie and connect the rebar of the current floor column with the rebar of the lower floor column. On-site tying requires a large and flat area and consumes a lot of time and labor. After prefabrication in the prefabrication plant, the multi-layer rebar cages are inconvenient to transport due to their length. At the same time, the hoisting of the rebar cages during construction requires large mechanical hoisting equipment due to the large weight of multiple rebar cages being hoisted simultaneously. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a prefabricated precast steel cage and formwork for reinforced concrete columns and a construction method thereof, so as to solve the above problems.

[0004] The present invention adopts the following solution:

[0005] This application provides a prefabricated assembled steel cage and formwork reinforced concrete column, including at least two steel cages, a connecting cage, a connecting ring plate, and a profiled steel sheet frame; the longitudinal bars and stirrups of the steel cages are connected by welding; multiple connecting ring plates are arranged longitudinally at intervals on the outer periphery of the steel cages; the profiled steel sheet frame surrounds the steel cages and is engaged with the connecting ring plates; the connecting cage includes longitudinal bars corresponding to and staggered with the longitudinal bars of the steel cages, and four transverse bars welded to the middle of the inner periphery of the longitudinal bars of the connecting cages; the length of the transverse bars is greater than the outer dimension of the stirrups and not greater than the outer dimension of the connecting ring plate; when the connecting cage is connected between two steel cages, the end faces of the profiled steel sheet frames of the two steel cages can abut against each other; concrete is poured inside the profiled steel sheet frame.

[0006] Furthermore, the distance from the first layer of stirrups on both sides of the reinforcing cage to the end face of the longitudinal reinforcement of the reinforcing cage is less than the distance from the transverse reinforcement to the end face of the longitudinal reinforcement of the connecting cage.

[0007] Furthermore, the distance from the transverse reinforcement to the upper end face of the longitudinal reinforcement of the connecting cage is twice the sum of the distance from the first layer of stirrups on both sides of the steel cage to the end face of the longitudinal reinforcement of the steel cage and the distance from the transverse reinforcement to the lower end face of the longitudinal reinforcement of the connecting cage.

[0008] Furthermore, the connecting ring plate includes four connecting plates welded together to form a shape adapted to the circumference of the reinforcing cage.

[0009] Furthermore, the connecting plate is provided with a connecting slot; the inner side of the profiled steel plate frame is provided with a snap-fit ​​part that matches the connecting slot.

[0010] Furthermore, the profiled steel sheet frame includes four profiled steel sheets, and the sides of two opposite profiled steel sheets are provided with a continuous locking edge.

[0011] Furthermore, the snap-fit ​​portion is a continuous snap-fit ​​portion arranged along the longitudinal direction.

[0012] A construction method for a reinforced concrete column includes the following steps:

[0013] S1: Prefabrication of steel reinforcement cages and connecting cages;

[0014] The stirrups are welded to the longitudinal bars of the steel cage to form a column-shaped steel cage; the longitudinal bars of the connecting cage corresponding to the number of longitudinal bars of the steel cage are welded to the four transverse bars to form a connecting cage.

[0015] S2: Multiple connecting ring plates are welded longitudinally at intervals along the outer periphery of the reinforcing cage;

[0016] S3: The profiled steel sheet frame is fitted onto the outer periphery of the reinforcing cage and fixedly connected with the connecting ring plate to form an integral reinforcing cage.

[0017] S4: Perform assembly;

[0018] First, the lower steel reinforcement cage is hoisted to the designated construction position. Then, the longitudinal bars of the connecting cage on the lower side are placed inside the lower steel reinforcement cage, and are staggered and lapped with the longitudinal bars of the corresponding steel cage on the upper side of the lower steel reinforcement cage. Next, the upper steel reinforcement cage is hoisted, so that the longitudinal bars of the connecting cage on the upper side are placed inside the upper steel reinforcement cage, and are staggered and lapped with the longitudinal bars of the corresponding steel cage on the lower side of the upper steel reinforcement cage, so that the lower end face of the profiled steel sheet frame of the upper steel reinforcement cage abuts against the upper end face of the profiled steel sheet frame of the lower steel reinforcement cage.

[0019] S5: Pour concrete into the assembled upper and lower steel reinforcement cages.

[0020] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0021] 1. All longitudinal bars and stirrups of the steel reinforcement cage are welded together at their contact points, so that the steel reinforcement cage can bear the force independently and provide support for the formwork.

[0022] 2. The steel reinforcement cage and formwork of the reinforced concrete column are prefabricated in the factory as a whole. After being hoisted into place on site, it can be poured directly, making construction convenient and quick.

[0023] 3. The upper and lower reinforced concrete columns are divided into multiple sections for assembly. The prefabricated steel reinforcement cage is easy to transport and easy to hoist during construction. There is no need to tie steel bars on site, making construction convenient and quick. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the reinforcing cage of a reinforced concrete column with an assembled prefabricated reinforcing cage and formwork according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the welded connecting ring plate on the outer periphery of the reinforcing cage of a reinforced concrete column with an assembled precast reinforcing cage and formwork according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the connecting ring plate of a reinforced concrete column with an assembled precast steel cage and formwork according to an embodiment of the present invention;

[0028] Figure 4 This is a top view of the first profiled steel sheet of a reinforced concrete column with an assembled precast steel cage and formwork, according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the steel skeleton part of a reinforced concrete column with an assembled precast steel cage and formwork according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the steel reinforcement skeleton of a reinforced concrete column with an assembled precast steel reinforcement cage and formwork according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the connecting cage structure of a precast steel cage and formwork for a reinforced concrete column according to an embodiment of the present invention.

[0032] Figure 8 This is a partial structural diagram of the upper and lower reinforcing steel skeleton of a reinforced concrete column assembled with a prefabricated steel cage and formwork according to an embodiment of the present invention.

[0033] Figure 9This is a schematic diagram of the structure of the upper and lower layers of the reinforcing steel skeleton of a reinforced concrete column after assembly, according to an embodiment of the present invention, using an assembled precast reinforcing steel cage and formwork.

[0034] Icons: Longitudinal reinforcement 1, stirrup 2, connecting ring plate 3, connecting section 31, welding section 32, connecting slot 311, first profiled steel plate 41, snap-fit ​​edge 412, snap-fit ​​part 411, second profiled steel plate 42, connecting cage longitudinal reinforcement 51, transverse reinforcement 52. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example

[0037] Combination Figures 1 to 9 As shown, this embodiment provides a prefabricated reinforced concrete column with assembled steel cages and formwork, including at least two steel cages, a connecting cage, a connecting ring plate 3, and a profiled steel sheet frame; the longitudinal bars 1 and stirrups 2 of the steel cages are connected by welding; multiple connecting ring plates 3 are arranged longitudinally at intervals on the outer periphery of the steel cages; the profiled steel sheet frame surrounds the steel cages and is engaged with the connecting ring plates 3; the connecting cage includes connecting cage longitudinal bars 51 that correspond to and are staggered with the longitudinal bars 1 of the steel cages, and four transverse bars 52 welded to the middle of the inner periphery of the connecting cage longitudinal bars 51; the length of the transverse bars 52 is greater than the outer dimension of the stirrups 2 and not greater than the outer dimension of the connecting ring plate 3; when the connecting cage is connected between two steel cages, the end faces of the profiled steel sheet frames of the two steel cages can abut against each other; concrete is poured inside the profiled steel sheet frame.

[0038] All longitudinal reinforcement bars 1 and stirrups 2 of the steel reinforcement cage are welded together, allowing the cage to bear load independently and provide support for the formwork. The steel reinforcement cage and formwork of the reinforced concrete column are prefabricated in the factory as a whole, and can be directly poured after hoisting into place on site, making construction convenient and quick. The upper and lower reinforced concrete columns are assembled in multiple sections. The prefabricated steel reinforcement cage is easy to transport and hoist during construction, eliminating the need for on-site rebar tying, making construction convenient and quick.

[0039] Specifically, in this embodiment, such as Figure 1 As shown, the reinforcing cage is formed by welding together multiple longitudinal bars 1 and stirrups 2 to create a columnar structure; as Figure 2 As shown, multiple connecting ring plates 3 are welded longitudinally at intervals along the outer periphery of the reinforcing cage; as Figure 3 As shown, the structure includes four connecting plates welded end-to-end to form a shape adapted to the circumference of the reinforcing cage. Each connecting plate includes a connecting section 31 and a welding section 32. The welding section 32 is welded to the longitudinal reinforcement 1 of the reinforcing cage at the same height on all four sides. The connecting section 31 is provided with a connecting slot 311. Figure 4-6 As shown, the profiled steel sheet frame includes four profiled steel sheets. The inner side of each profiled steel sheet is provided with a continuous snap-fit ​​part 411, which can pass through the connecting slot 311 on the corresponding connecting plate from top to bottom or from bottom to top to complete the connection between the profiled steel sheet and the connecting plate, so as to form an integral steel reinforcement skeleton. Furthermore, the sides of the two opposing first profiled steel sheets 41 are provided with continuous snap-fit ​​edges 412, which can wrap the sides of the two second profiled steel sheets 42 of another object, preventing concrete from flowing out from the gaps at the connection of the profiled steel sheets during the pouring process.

[0040] like Figure 7 and Figure 8 As shown, the connecting cage includes connecting cage longitudinal bars 51 that correspond to and are staggered with the longitudinal bars 1 of the reinforcing cage, and four transverse bars 52 welded to the middle of the inner circumference of the connecting cage longitudinal bars 51; the length of the transverse bars 52 is greater than the outer dimension of the stirrups 2 and not greater than the outer dimension of the connecting ring plate 3; so that when the connecting cage is assembled, the transverse bars 52 are placed on the stirrups 2 of the first layer of the lower reinforcing cage to prevent them from falling off.

[0041] Preferably, the distance from the first layer of stirrups 2 on both sides of the reinforcing cage to the end face of the longitudinal reinforcement 1 of the reinforcing cage is less than the distance from the transverse reinforcement 52 to the end face of the longitudinal reinforcement 51 of the connecting cage, so as to avoid the upper connecting cage longitudinal reinforcement 51 being completely placed in the lower reinforcing cage when the lower connecting cage longitudinal reinforcement 51 is placed in the lower reinforcing cage skeleton, without overlapping with the longitudinal reinforcement 1 of the upper reinforcing cage.

[0042] More preferably, the distance from the transverse reinforcement 52 to the upper end face of the longitudinal reinforcement 51 of the connecting cage is twice the sum of the distance from the first layer of stirrups 2 on both sides of the steel cage to the end face of the longitudinal reinforcement 1 of the steel cage and the distance from the transverse reinforcement 52 to the lower end face of the longitudinal reinforcement 51 of the connecting cage, so that the upper longitudinal reinforcement 51 of the connecting cage has the same length to overlap with the longitudinal reinforcement 1 of the steel cage of the upper steel cage.

[0043] The following details the construction method for this reinforced concrete column, including the following steps:

[0044] S1: Prefabrication of steel reinforcement cages and connecting cages;

[0045] Weld the stirrups 2 to the longitudinal bars 1 of the steel cage to form a columnar steel cage; weld the connecting cage longitudinal bars 51, which correspond to the number of longitudinal bars 1 of the steel cage, to the four transverse bars 52 to form a connecting cage.

[0046] S2: Weld multiple connecting ring plates 3 at longitudinal intervals along the outer periphery of the reinforcing cage;

[0047] S3: The profiled steel sheet frame is fitted onto the outer periphery of the reinforcing cage and fixedly connected to the connecting ring plate 3 to form an integral reinforcing cage;

[0048] S4: Perform assembly;

[0049] First, the lower steel reinforcement cage is hoisted to the designated construction position. Then, the longitudinal reinforcement 51 of the connecting cage on the lower side is placed inside the lower steel reinforcement cage and overlapped with the longitudinal reinforcement 1 of the corresponding steel cage on the upper side of the lower steel reinforcement cage. Next, the upper steel reinforcement cage is hoisted so that the longitudinal reinforcement 51 of the connecting cage on the upper side is placed inside the upper steel reinforcement cage and overlapped with the longitudinal reinforcement 1 of the corresponding steel cage on the lower side of the upper steel reinforcement cage, so that the lower end face of the profiled steel sheet frame of the upper steel reinforcement cage abuts against the upper end face of the profiled steel sheet frame of the lower steel reinforcement cage.

[0050] S5: Pour concrete into the assembled upper and lower steel reinforcement cages.

[0051] The steel reinforcement cage and formwork of the reinforced concrete column are prefabricated in the factory as a whole, and can be directly poured after hoisting into place on site, making construction convenient and quick. At the same time, the upper and lower reinforced concrete columns are assembled in multiple sections. The prefabricated steel reinforcement cage is easy to transport and hoist during construction, and there is no need to tie steel bars on site, making construction convenient and quick.

[0052] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A precast reinforced concrete column with assembled steel cages and formwork, comprising at least two steel cages, characterized in that, It also includes a connecting cage, connecting ring plates, and a profiled steel sheet frame; The longitudinal bars and stirrups of the reinforcing cage are connected by welding; multiple connecting ring plates are arranged longitudinally at intervals on the outer periphery of the reinforcing cage; the profiled steel sheet frame surrounds the reinforcing cage and is snapped into the connecting ring plates; the connecting cage includes longitudinal bars corresponding to and staggered from the longitudinal bars of the reinforcing cage, and four transverse bars welded to the middle of the inner periphery of the longitudinal bars of the connecting cage; the length of the transverse bars is greater than the outer dimension of the stirrups, but not greater than the outer dimension of the connecting ring plates; when the connecting cage is connected between two reinforcing cages, the end faces of the profiled steel sheet frames of the two reinforcing cages can abut against each other; concrete is poured inside the profiled steel sheet frame. The connecting ring plate includes four connecting plates welded together to form a shape that is adapted to the circumference of the reinforcing cage; the connecting plates are provided with connecting slots; the inner side of the profiled steel plate frame is provided with a snap-fit ​​part adapted to the connecting slots.

2. The reinforced concrete column with assembled precast steel cage and formwork according to claim 1, characterized in that, The distance from the first layer of stirrups on both sides of the steel cage to the end face of the longitudinal reinforcement of the steel cage is less than the distance from the transverse reinforcement to the end face of the longitudinal reinforcement of the connecting cage.

3. The reinforced concrete column with assembled precast steel cage and formwork according to claim 2, characterized in that, The distance from the transverse reinforcement to the upper end face of the longitudinal reinforcement of the connecting cage is twice the sum of the distance from the first layer of stirrups on both sides of the steel cage to the end face of the longitudinal reinforcement of the steel cage and the distance from the transverse reinforcement to the lower end face of the longitudinal reinforcement of the connecting cage.

4. The reinforced concrete column with assembled precast steel cage and formwork according to claim 1, characterized in that, The profiled steel sheet frame includes four profiled steel sheets, and two of the profiled steel sheets facing each other have a continuous interlocking edge on their sides.

5. The reinforced concrete column with assembled precast steel cage and formwork according to claim 1, characterized in that, The snap-fit ​​part is a continuous snap-fit ​​part arranged along the longitudinal direction.

6. A construction method for a reinforced concrete column as described in any one of claims 1-5, characterized in that, Includes the following steps: S1: Prefabrication of steel reinforcement cages and connecting cages; The stirrups are welded to the longitudinal bars of the steel cage to form a column-shaped steel cage; the longitudinal bars of the connecting cage corresponding to the number of longitudinal bars of the steel cage are welded to the four transverse bars to form a connecting cage. S2: Multiple connecting ring plates are welded longitudinally at intervals along the outer periphery of the reinforcing cage; S3: The profiled steel sheet frame is fitted onto the outer periphery of the reinforcing cage and fixedly connected with the connecting ring plate to form an integral reinforcing cage. S4: Assembly; First, hoist the lower steel cage to the designated construction position, then place the longitudinal bars of the lower connecting cage inside the lower steel cage, and stagger and overlap them with the longitudinal bars of the corresponding upper steel cage; then hoist the upper steel cage so that the longitudinal bars of the upper connecting cage are placed inside the upper steel cage, and stagger and overlap them with the longitudinal bars of the corresponding lower steel cage, so that the lower end face of the profiled steel sheet frame of the upper steel cage abuts against the upper end face of the profiled steel sheet frame of the lower steel cage. S5: Pour concrete into the assembled upper and lower steel reinforcement cages.

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