Steel bar support of special-shaped large-section annular prestressed concrete structural beam

Abstract

The utility model relates to a steel bar support of a special-shaped large-section annular prestressed concrete structural beam. The device is characterized by comprising sheet supports and cross supports and being characterized in that each sheet support comprises a vertical rod, a plurality of cross beams and inclined supports, the vertical rods are vertically arranged, the cross beams are arranged in parallel at intervals along the upper portions, the middle portions and the lower portions of the vertical rods, and the inclined supports are arranged at the two ends of the cross beams; and the supports are horizontally connected through the cross braces to form a three-dimensional steel bar bracket. According to the steel bar support provided by the utility model, the steel bar supporting frame is only made of the channel steel and the angle steel, and compared with a common steel bar horse stool and a sheet-shaped steel pipe fastener support, the steel bar support has higher rigidity and stability, can bear the weight of the steel bars without displacement, ensures the space between the steel bars, and also plays a role in positioning a prestressed pipeline.

Description

Technical Field

[0001] This utility model relates to the field of concrete construction technology, and in particular to the construction technology of large-sized, differently shaped prestressed concrete structural beams, specifically a steel reinforcement support for an irregularly shaped, large-section ring-shaped prestressed concrete structural beam. Background Technology

[0002] During the construction of a gymnasium, a 4.3m x 6.3m parallelogram-shaped ring beam and roof are supported by 36 structural columns (2.2m x 1m x 22m cross-section) to transfer the load. In the structural construction process, the structural columns are constructed first, followed by the circumferential prestressed ring beam. During the construction of the ring beam, the self-weight of the reinforcing steel cannot be directly transferred through the already constructed structural columns; therefore, an effective steel reinforcement support is needed to transfer the load of the entire construction process to the formwork support.

[0003] Considering the massive cross-section of the ring beam, its dense internal reinforcement, and the weight of up to 8 tons per meter along the beam direction, coupled with the beam's overall circular shape and circumferential arrangement, along with the need to pass prestressing ducts within the center, a steel reinforcement support frame is required to control the spacing of the reinforcement bars. This prevents changes in the reinforcement spacing during concrete pouring due to vibration, which could compress the prestressing ducts. Typical steel reinforcement support frames use A-frame stirrups (fabricated or custom-made on-site), placed at specific intervals between the upper and lower reinforcement bars. However, these stirrups are only suitable for use on ground surfaces and floor slabs; they are difficult to secure and lack sufficient load-bearing capacity when used for tying reinforcement in large-volume beams. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned defects and propose a new type of steel bar support frame, thereby solving the problems of steel bar binding, prestressed duct positioning, and steel bar saving in high-density, large-volume irregular prestressed beam structures.

[0005] To achieve the above objectives, this utility model is implemented as follows:

[0006] A steel reinforcement support for an irregularly shaped, large-section, annular prestressed concrete structural beam includes sheet supports and horizontal braces. Each sheet support includes an upright, a horizontal beam, and diagonal braces. The upright is vertically arranged, and multiple horizontal beams are arranged parallel to each other at intervals along the upper, middle, and lower parts of the upright. Diagonal braces are provided at both ends of the horizontal beams. The sheet supports are horizontally connected by horizontal braces to form a three-dimensional steel reinforcement support.

[0007] The steel reinforcement support for the irregular large-section annular prestressed concrete structural beam also includes scissor bracing. The scissor bracing is used in conjunction with the cross bracing. After the sheet supports are connected by the cross bracing to form a three-dimensional steel reinforcement support, scissor bracing is set between adjacent sheet supports.

[0008] In the existing technology, the support frame for reinforcing bars using steel bar trestles and sheet steel pipe fasteners has insufficient load-bearing capacity. Displacement may occur during concrete pouring and vibration, resulting in insufficient spacing between reinforcing bars and insufficient overall stability. When there is a horizontal force in the elongation direction, other reinforcing bar supports are at risk of collapsing.

[0009] The steel bar support proposed in this utility model is made of channel steel and angle steel to form a steel bar support frame. Compared with ordinary steel bar trestles and sheet steel pipe fastener supports, it has greater rigidity and stability, can bear the weight of the steel bars without displacement, ensures the space between the steel bars, and also plays the role of positioning the prestressed duct. In addition, it can replace part of the longitudinal main reinforcement of the ring beam, which can save steel bars and appropriately relieve the tight space inside the ring beam. It can ensure that the position of the prestressed duct does not shift during concrete vibration.

[0010] Furthermore, in the steel reinforcement support proposed in this utility model, the uprights and beams in the sheet support are made of 12# or 14# channel steel, while the diagonal braces, horizontal braces, and scissor braces are made of 50×50×5 angle steel. This makes the steel reinforcement support easy to manufacture in actual operation. Attached Figure Description

[0011] Figure 1 This invention provides a schematic diagram of the side structure of the steel bar support.

[0012] Figure 2 This invention provides a schematic diagram of the back or outer side structure of the steel bar support.

[0013] Figure 3 This utility model provides a schematic diagram of the usage state of the steel bar support. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0015] like Figure 1 , Figure 2 A steel reinforcement support for an irregularly shaped large-section annular prestressed concrete structural beam includes a sheet support 1 and a cross brace 2. The sheet support 1 includes an upright 3, a cross beam 4 and a diagonal brace 5. The upright 3 is vertically arranged, and there are multiple cross beams 4 arranged parallel to each other along the upper, middle and lower parts of the upright 3. Diagonal braces are set at both ends of the cross beams 4. The sheet supports 1 are horizontally connected by the cross braces 2 to form a three-dimensional steel reinforcement support.

[0016] The steel reinforcement support for the irregular large-section annular prestressed concrete structural beam also includes scissor bracing 6. The scissor bracing 6 is used in conjunction with the cross bracing 2. After the sheet supports 1 are connected by the cross bracing 2 to form a three-dimensional steel reinforcement support, scissor bracing 6 is set between adjacent sheet supports 1.

[0017] In the existing technology, the support frame for reinforcing bars using steel bar trestles and sheet steel pipe fasteners has insufficient load-bearing capacity. Displacement may occur during concrete pouring and vibration, resulting in insufficient spacing between reinforcing bars and insufficient overall stability. When there is a horizontal force in the elongation direction, other reinforcing bar supports are at risk of collapsing.

[0018] like Figure 3 For the aforementioned irregular large-section ring-shaped prestressed concrete structural beams, when the vertical or horizontal bars forming the sheet support overlap with the structural reinforcement of the beam, the vertical or horizontal bars are replaced by the structural reinforcement. During welding, double-sided full welding should be performed to meet the requirement that the diameter of the reinforcement bar is 5 times the nominal diameter. When welding on one side, the diameter of the reinforcement bar should be 10 times the nominal diameter.

[0019] Furthermore, in the steel reinforcement support proposed in this utility model, the uprights 3 and crossbeams 4 in the sheet support 1 are made of 12# or 14# channel steel, while the diagonal braces 5, horizontal braces 2, and scissor braces 6 are made of 50×50×5 angle steel. Thus, the steel reinforcement support is easy to manufacture in actual operation.

[0020] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steel reinforcement support for an irregularly shaped, large-section, annular prestressed concrete structural beam, characterized in that: It includes sheet supports and cross braces, characterized in that: the sheet supports include uprights, cross beams and diagonal braces, the uprights are set vertically, there are multiple cross beams that are set parallel to each other at intervals along the upper, middle and lower parts of the uprights, and diagonal braces are set at both ends of the cross beams; the sheet supports are horizontally connected to each other through cross braces to form a three-dimensional steel reinforcement support.

2. The steel reinforcement support for the irregularly shaped large-section annular prestressed concrete structural beam according to claim 1, characterized in that: It also includes scissor bracing, which is used in conjunction with cross bracing. After the sheet supports are connected by cross bracing to form a three-dimensional steel reinforcement support, scissor bracing is set between adjacent sheet supports.

3. The steel reinforcement support for the irregularly shaped large-section annular prestressed concrete structural beam according to claim 1 or 2, characterized in that: When the vertical or horizontal bars that form the support overlap with the structural reinforcement of the beam, the vertical or horizontal bars are replaced by the structural reinforcement.

4. The steel reinforcement support for the irregularly shaped large-section annular prestressed concrete structural beam according to claim 1 or 2, characterized in that: Uprights, crossbeams, diagonal braces, or horizontal braces should be fully welded on both sides and meet the requirement that the diameter is 5 times the nominal diameter. When welding on one side, the diameter should meet the requirement that the diameter is 10 times the nominal diameter.

5. The steel reinforcement support for the irregularly shaped large-section annular prestressed concrete structural beam according to claim 1 or 2, characterized in that: The uprights and beams in the support are made of 12# or 14# channel steel, while the diagonal braces, horizontal braces and scissor braces are made of angle steel.

Images