Staged assembled building box girder

Abstract

The utility model discloses a staged assembled building box girder, which relates to the technical field of building steel templates and construction equipment, and comprises a plurality of steel box girder units, each steel box girder unit comprises a girder top plate, girder side plates and a girder bottom plate, the girder side plates are arranged on two opposite sides of the bottom of the girder top plate, and the girder bottom plates are arranged on the girder top plate. The bottoms of the beam side plates are fixedly connected with a beam bottom plate, and the free ends of the two beam side plates are each provided with a first prestressed steel bar. The sectional type assembled structural steel box girder unit has the advantages that by means of the sectional type assembled structural steel box girder unit composed of the girder top plate, the girder side plates, the girder bottom plate, the transverse partition plates and the like, assembly of a building structure is more convenient, on-site rapid installation can be achieved, the building construction period is greatly shortened, the construction efficiency is improved, and the construction cost is reduced. And the whole building box girder can be conveniently decomposed in the transportation process, the size is reduced, the transportation convenience is improved, the steel box girder units can be prefabricated in a factory, standardized production is facilitated, and the quality is reliable.

Description

Technical Field

[0001] The utility model relates to a building box beam, in particular to a stage-type assembled building box beam, and belongs to the technical field of building steel formwork and construction equipment. Background Art

[0002] Box girder is a type of beam used in bridge engineering. It is hollow inside and has flanges on both sides of the upper part, similar to a box, hence the name. It is divided into single-box and multi-box types. Box girders of reinforced concrete structures are divided into prefabricated box girders and cast-in-place box girders. Box girders prefabricated in an independent site can be erected in combination with a bridge-erecting machine after the lower project is completed, which can speed up the progress of the project and save construction time. Cast-in-place box girders are mostly used for large continuous bridges. There are two main types of common materials, one is prestressed reinforced concrete box girder and the other is steel box girder. Among them, prestressed reinforced concrete box girder is constructed on-site. In addition to longitudinal prestress, some also have transverse prestress. Steel box girders are generally processed in the factory and then transported to the site for installation. There are all-steel structures and some with reinforced concrete pavement layers. Among them, steel box girders, also called steel plate box girders, are a common structural form for large-span bridges. It is generally used on bridges with larger spans. It looks like a box, so it is called a steel box girder.

[0003] Among them, the "box beam" disclosed in the application number "CN 207392039 U" is also an increasingly mature technology, which includes a top plate, web plates arranged on both sides of the top plate, and a bottom plate located at the bottom end of the web plates. A reinforcing plate is fixedly arranged at one end of the web plate close to the bottom plate and on the side of the web plates away from each other, and an anti-seismic plate is arranged on the side of the bottom plate away from the top plate; a plurality of embedded rib holes are opened at the connection between the web plate and the bottom plate, and reinforcing ribs are embedded in the embedded rib holes. It can reduce the vibration of the box beam, reduce the cracks caused by vibration in the box beam, and increase its service life;

[0004] However, the above method still has the following defects in actual use: the box girder is formed as an integral whole and does not have the feature of staged assembly, which reduces the flexibility of the box girder; and the overall volume of the box girder is large, and it is easily restricted by the height limitation of the device in transportation projects, which is too heavy a burden for transportation vehicles and inconvenient to transport. Summary of the invention

[0005] The utility model aims to provide a staged assembled building box beam to solve the problem that the box beam as a whole cannot be assembled and spliced ​​and is inconvenient to transport as proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a staged assembled building box girder, including a steel box girder unit, wherein a plurality of steel box girder units are provided, and the steel box girder unit includes a beam top plate, a beam side plate and a beam bottom plate, and beam side plates are provided on both opposite sides of the bottom of the beam top plate, the bottom of the beam side plate is fixedly connected with the beam bottom plate, the free ends of the two beam side plates are provided with a first prestressed steel bar, the top of the beam side plate is provided with an embedded steel bar cluster and embedded bolts, a plurality of cross partitions are provided in the middle part of the two beam side plates, and installation grooves are provided around the cross partitions, the opposite sides of the two beam side plates are fixedly connected with a docking plate, and the top of the beam bottom plate is fixedly connected with a docking seat.

[0007] Preferably, a plurality of bolt reserved holes are provided at the top of the beam top plate, and a steel bar cluster reserved hole is provided in the middle portion between two of the bolt reserved holes.

[0008] Preferably, the bolt reserved holes and the embedded bolts are arranged correspondingly, and the steel bar cluster reserved holes and the embedded steel bar cluster are arranged correspondingly.

[0009] Preferably, a plurality of prestressed channels are opened at the free end of the beam top plate, and the prestressed channels of multiple beam top plates are aligned and connected to each other, and a second prestressed steel bar connected to the beam top plate is arranged inside the prestressed channel.

[0010] Preferably, a steel plate is movably mounted on the top of the bolt reserved hole, and a fixing nut is movably mounted on the top of the steel plate.

[0011] Preferably, the two beam side plates between the beam top plate and the beam bottom plate are arranged in a symmetrical inclined structure, and the beam side plates and the beam bottom plate are connected and assembled by welding or integral molding.

[0012] Preferably, the material of the steel box beam unit is set to Q345 steel.

[0013] Compared with the related art, the staged assembled building box beam provided by the utility model has the following beneficial effects:

[0014] 1. By setting up a segmented structural steel box beam unit composed of a beam top plate, a beam side plate, a beam bottom plate and a diaphragm, the assembly of the building structure is more convenient and can be quickly installed on site, which greatly shortens the construction period and improves the construction efficiency. It is also convenient to decompose the building box beam as a whole during transportation, reduce the volume and increase the convenience of transportation. The steel box beam unit can be prefabricated in the factory, which is conducive to standardized production and reliable quality. It can be transported to the site for assembly and hoisting, with high flexibility and safety. The assembled building box beam structure is stable and well protected, and can be flexibly designed to meet different building requirements, such as different space requirements, building heights, building shapes, etc. The used building box beam can also be recycled, which is environmentally friendly and energy-saving, and reduces the generation of construction waste;

[0015] 2. By setting the second prestressed steel bar, it is convenient to connect multiple steel box beam units in the longitudinal direction, thereby enhancing the stability of the main structure of the building. By adopting a connection assembly of welding and one-piece forming between the beam top plate, beam side plate and beam bottom plate, the structural strength of the steel box beam unit itself is high. By setting the material of the steel box beam unit to Q345 steel, not only the overall strength of the building box beam is increased, it can withstand greater weight and pressure, but also the price is relatively economical, which helps to reduce the construction cost of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the overall structure of the utility model;

[0017] FIG2 is an exploded view of the steel box beam unit structure of the utility model; FIG3 is a schematic diagram of the embedded steel bar cluster structure of the utility model;

[0018] FIG4 is a schematic diagram of the transverse partition structure of the utility model; FIG5 is an exploded diagram of the local structure of the utility model.

[0019] In the figure: 1, steel box beam unit; 101, beam top plate; 102, beam side plate; 103, beam bottom plate; 2, first prestressed steel bar; 3, embedded steel bar cluster; 4, embedded bolts; 5, cross diaphragm; 6, installation groove; 7, docking plate; 8, docking seat; 9, bolt reserved hole; 10, steel bar cluster reserved hole; 11, prestressed hole;

[0020] 12. Second prestressed steel bar; 13. Steel base plate; 14. Fixing nut. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] Please refer to Figures 1-5. The utility model provides a staged assembled building box girder, including a steel box girder unit 1. A plurality of steel box girder units 1 are provided. The steel box girder unit 1 includes a beam top plate 101, a beam side plate 102 and a beam bottom plate 103. The beam top plate 101 has beam side plates 102 on opposite sides of the bottom. The bottom of the beam side plates 102 is fixedly connected to the beam bottom plate 103. The free ends of the two beam side plates 102 are provided with first prestressed steel bars 2. The tops of the beam side plates 102 are provided with embedded steel bar clusters 3 and embedded bolts 4. The middle parts of the two beam side plates 102 are provided with a plurality of transverse partitions 5. The transverse partitions 5 are provided with mounting grooves 6 around them. The opposite sides of the two beam side plates 102 are fixedly connected to docking plates 7. The top of the beam bottom plate 103 is fixedly connected to a docking seat 8.

[0024] Specifically, by providing a segmented structural steel box beam unit 1 composed of a beam top plate 101, a beam side plate 102, a beam bottom plate 103 and a transverse diaphragm 5, the assembly of the building structure is more convenient, and can be quickly installed on site, which greatly shortens the construction period, improves the construction efficiency, and facilitates the decomposition of the building box beam as a whole during transportation, reduces the volume, and increases the convenience of transportation; Embodiment 2:

[0025] Please refer to FIG. 1 , FIG. 2 , and FIG. 5 . A plurality of bolt reserved holes 9 are provided on the top of the beam top plate 101 . A steel bar cluster reserved hole 10 is provided in the middle of two bolt reserved holes 9 .

[0026] The bolt reserved holes 9 are arranged corresponding to the embedded bolts 4, and the steel bar cluster reserved holes 10 are arranged corresponding to the embedded steel bar clusters 3;

[0027] A plurality of prestressed channels 11 are provided at the free end of the beam top plate 101. The prestressed channels 11 of the plurality of beam top plates 101 are aligned and connected to each other. The second prestressed steel bars 12 connected to the beam top plates 101 are provided inside the prestressed channels 11.

[0028] Specifically, by providing the second prestressed steel bars 12, it is convenient to connect multiple steel box beam units 1 in the longitudinal direction, thereby enhancing the stability of the main structure of the building.

[0029] Please refer to FIG. 1 , FIG. 2 , and FIG. 5 . A steel plate 13 is movably mounted on the top of the bolt reserved hole 9 . A fixing nut 14 is movably mounted on the top of the steel plate 13 .

[0030] The two beam side plates 102 between the beam top plate 101 and the beam bottom plate 103 are arranged in a symmetrical inclined structure, and the beam side plates 102 and the beam bottom plate 103 are connected and assembled by welding or integral molding; the material of the steel box beam unit 1 is set to Q345 steel.

[0031] Specifically, by adopting welding or one of the integral molding connection assemblies between the beam top plate 101, the beam side plate 102 and the beam bottom plate 103, the structural strength of the steel box beam unit 1 itself is made high. By setting the material of the steel box beam unit 1 to Q345 steel, not only the overall strength of the building box beam is increased and can withstand greater weight and pressure, but also the price is relatively economical, which helps to reduce the construction cost of the building.

[0032] Working principle: First, several prefabricated building steel box beam units 1 are transported to the construction site by trucks, and then the various structural parts in the steel box beam unit 1 are assembled on site to tension and grout the first prestressed steel bar 2, and then the diaphragm 5 is limited by the docking plate 7 and the docking seat 8 at the main support point and the mid-span position, and then the beam top plate 101 is hoisted to the top of the beam side plate 102, so that the embedded steel bar cluster 3 and the embedded bolt 4 on the beam side plate 102 pass through the steel bar cluster reserved hole 10 and the bolt reserved hole 9 of the beam top plate 101 respectively, and then the second prestressed steel bar 12 is passed through the prestressed channel 11 connected by multiple beam top plates 101 and tensioned and grouted, and finally the multiple beam top plates 101 and the beam side plates 102 are fixed by connecting the steel pad 13 and the nut with the embedded bolt 4. When the construction reaches the final stage, the embedded steel bar cluster 3 passing through the steel bar cluster reserved hole 10 is fixed. The pavement layer is connected to form a whole, the pavement layer concrete is poured and the reserved holes 10 of the steel bar cluster are filled, so that the main structure of the building is poured into a whole. Although the embodiments of the utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A staged assembled building box girder, characterized in that: The invention comprises a steel box beam unit (1), wherein a plurality of the steel box beam units (1) are provided, and the steel box beam unit (1) comprises a beam top plate (101), a beam side plate (102) and a beam bottom plate (103). The beam top plate (101) is provided with beam side plates (102) on opposite sides of the bottom, the bottom of the beam side plates (102) is fixedly connected to the beam bottom plate (103), the free ends of the two beam side plates (102) are provided with first prestressed steel bars (2), the tops of the beam side plates (102) are provided with embedded steel bar clusters (3) and embedded bolts (4), a plurality of transverse partitions (5) are provided in the middle of the two beam side plates (102), the transverse partitions (5) are provided with mounting grooves (6) on all sides, the opposite sides of the two beam side plates (102) are fixedly connected to docking plates (7), and the top of the beam bottom plate (103) is fixedly connected to a docking seat (8).

2. The staged assembled building box beam according to claim 1 is characterized in that: A plurality of bolt pre-set holes (9) are provided at the top of the beam top plate (101), and a steel bar cluster pre-set hole (10) is provided in the middle of two of the bolt pre-set holes (9).

3. The staged assembled building box beam according to claim 2 is characterized in that: The bolt reserved holes (9) are arranged correspondingly to the embedded bolts (4), and the steel bar cluster reserved holes (10) are arranged correspondingly to the embedded steel bar cluster (3).

4. The staged assembled building box beam according to claim 1 is characterized in that: A plurality of prestressed channels (11) are provided at the free end of the beam top plate (101); the prestressed channels (11) of the plurality of beam top plates (101) are aligned and connected to each other; and a second prestressed steel bar (12) connected to the beam top plate (101) is provided inside the prestressed channel (11).

5. The staged assembled building box beam according to claim 2 is characterized in that: A steel backing plate (13) is movably mounted on the top of the bolt reserved hole (9), and a fixing nut (14) is movably mounted on the top of the steel backing plate (13).

6. The staged assembled building box beam according to claim 1 is characterized in that: The two beam side plates (102) between the beam top plate (101) and the beam bottom plate (103) are arranged in a symmetrical inclined structure, and the beam side plates (102) and the beam bottom plate (103) are connected and assembled by welding or integral molding.

7. The staged assembled building box beam according to claim 1 is characterized in that: The material of the steel box beam unit (1) is set to be Q345 steel.

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