CN211713647U - Full-assembly type steel concrete combined box girder - Google Patents

Abstract

The utility model discloses a fully assembled steel-concrete composite box girder, which comprises two steel beams arranged horizontally and laterally. Beam mounting seat, a plurality of tapered cast irons are arranged inside the concrete upper flange, so that the connection between the steel beam and the upper flange plate has a certain pullout resistance. The side with the smaller diameter of the tapered cast iron is provided with threaded holes, and the steel beam The upper and lower parts are provided with a plurality of holes, the diameter of the holes is adapted to the diameter of the screw, the lower part of the steel beam is provided with a concrete lower flange, the top surface of the concrete lower flange is provided with an upwardly protruding steel beam mounting seat, and the concrete lower flange The interior features multiple tapered cast irons. The beneficial effects of the utility model are: not only good strength, strong resistance to longitudinal shearing, but also forming a separate installation module, the upper part of the upper flange plate can be prefabricated bridge deck pavement layer or decorative layer, improving site construction efficiency.

Description

A fully assembled steel-concrete composite box girder

technical field

The utility model belongs to the technical field of steel-concrete composite beams, in particular to a fully assembled steel-concrete composite box beam.

Background technique

At present, steel-concrete composite beams are increasingly widely used in the field of structural engineering.

The load-bearing capacity of the steel-concrete composite beam structure depends on the effective transmission of the force at the joint between the concrete and the steel beam. The design of the joint is very important, and it must be considered whether the longitudinal horizontal shear force between the steel and the concrete can be obtained. Effective control, the shear connector is a connecting component that combines the steel beam and the concrete wing plate to work together, and plays the role of transmitting the longitudinal shear force between the steel beam and the concrete wing plate, so as to ensure that the two different materials are used when the structure moves. There is no relative displacement between them, and the effectiveness of the connection here directly affects the structural stability and safety of the steel-concrete composite beam.

The concrete part of the traditional steel-concrete composite beam needs to be poured on site, the construction period is long, and the effect after forming is poor. For this reason, engineers have been looking for prefabricated solutions.

SUMMARY OF THE INVENTION

The utility model provides a fully assembled steel-concrete composite box girder, which not only has good strength, strong longitudinal shear resistance, but also is convenient to install and has high construction efficiency.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A fully assembled steel-concrete composite box girder comprises two horizontally arranged steel beams, the two steel beams are arranged in parallel with each other, the upper part of the steel beams is provided with a concrete upper flange, and the concrete upper flange is a horizontally arranged plate-like structure The bottom surface of the concrete upper flange is provided with two downwardly protruding steel beam mounting seats, the top surface of each steel beam is in contact with the bottom surface of the corresponding steel beam mounting seat, and the front and rear sides of the concrete upper flange are provided with upper flanges The protruding edge is provided with a plurality of tapered cast irons inside the upper flange of the concrete. The tapered cast iron has a conical structure. The side with the smaller diameter of the tapered cast iron is provided with a threaded hole, and the threaded hole is provided with a screw that matches the internal thread. , There is a nut on the screw, the position of the tapered cast iron corresponds to the position of the steel beam mounting seat, the upper and lower parts of the steel beam are provided with a plurality of holes, and the number and position of the holes correspond to the number and position of the tapered cast iron. The diameter is adapted to the diameter of the screw, the lower part of the steel beam is provided with a concrete lower flange, the top surface of the concrete lower flange is provided with a steel beam mounting seat protruding upward, and a plurality of tapered cast irons are arranged inside the concrete lower flange.

Further, the upper surface of the concrete upper flange is provided with a decorative layer.

Further, the steel beams include I-beam, "H" section steel, "T" section steel, channel steel, square steel, corrugated steel, and other common steel structures.

Further, the tapered cast iron in the concrete upper flange is arranged vertically and the smaller diameter side of the tapered cast iron in the concrete upper flange is located at the lower part, and the tapered cast iron in the concrete lower flange is arranged vertically and inside the concrete lower flange. The smaller diameter side of the tapered cast iron is located on the upper part.

Further, the bottom surface of the tapered cast iron in the concrete upper flange is flush with the bottom surface of the steel beam mounting seat at the bottom of the concrete upper flange, and the top surface of the tapered cast iron in the concrete lower flange is flush with the top steel beam mounting seat of the concrete lower flange. the top surface is flush.

Further, the minimum straightness of the tapered cast iron is adapted to the diameter of the screw, and the inner thread of the tapered cast iron is adapted to the screw thread.

Further, the internal thread is centered on the smaller diameter side of the tapered cast iron.

Compared with the prior art, the beneficial effects of the present utility model are:

In the utility model, the conical cast iron is directly poured inside the concrete upper flange and the concrete lower flange. The concrete upper flange and the concrete lower flange are all processed in the factory to form a whole assembly module. Nuts and screws can quickly fix the steel beam, which can greatly reduce the construction period on site and facilitate transportation. By setting the nuts and screws, the longitudinal resistance between the upper flange of the concrete and the steel beam and the lower flange of the concrete can be enhanced. The shear force makes the overall steel-concrete composite beam firmer, and the nuts and steel beams are replaceable. After damage, they can be replaced directly with the same type of products, which not only greatly shortens the maintenance time, but also the entire structure is more energy-saving and environmentally friendly. The pre-embedded conical cast iron makes the longitudinal force effect of the entire structure better, so that the entire structure has a strong lateral and longitudinal bearing capacity, and because of the special circular truncated structure of the conical cast iron, the conical cast iron and the concrete upper flange, conical The connection between the cast iron and the concrete lower flange is firm, the vertical force effect is good, and it has a certain pull-out resistance. By setting the steel beam mounting seat, the steel beam and the concrete upper flange, and the steel beam and the concrete lower flange are connected The buffer is added, and the overall structure is stronger. By arranging two steel beams between the concrete upper flange and the concrete lower flange, the strength of the steel-concrete composite beam is increased.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the sectional view of the utility model;

Figure 3 is a schematic view of the structure of the tapered cast iron part.

In the picture: 1. Concrete upper flange, 2. Concrete lower flange, 3. Steel beam, 4. Screw, 5. Nut, 6. Conical cast iron, 7. Hole, 8. Steel beam mounting seat, 9. The upper flange protrudes from the edge.

Detailed ways

Embodiment: as shown in Figure 1, Figure 2, Figure 3, including two steel beams 3 horizontally arranged, the two steel beams 3 are arranged in parallel with each other, the upper part of the steel beam 3 is provided with a concrete upper flange 1, the concrete upper wing The flange 1 is a horizontally arranged plate-like structure. The bottom surface of the concrete upper flange 1 is provided with two downwardly protruding steel beam mounting seats 8. The top surface of each steel beam 3 is in contact with the bottom surface of the corresponding steel beam mounting seat 8. The front and rear sides of the upper flange 1 are provided with protruding edges 9 of the upper flange, and a plurality of conical cast irons 6 are arranged inside the concrete upper flange 1. The conical cast iron 6 is a cone-shaped structure. There is a threaded hole on one side, a screw 4 matched with the internal thread is arranged in the threaded hole, a nut 5 is arranged on the screw 4, the position of the tapered cast iron 6 corresponds to the position of the steel beam mounting seat 8, and the upper part of the steel beam 3, The lower part is provided with a plurality of holes 7, the number and position of the holes 7 correspond to the number and position of the tapered cast iron 6, the diameter of the holes 7 is adapted to the diameter of the screw 4, and the lower part of the steel beam 3 is provided with a concrete lower flange 2 The top surface of the concrete lower flange 2 is provided with a steel beam mounting seat 8 protruding upward, and a plurality of tapered cast irons 6 are arranged inside the concrete lower flange 2 .

The upper surface of the concrete upper flange 1 is provided with a decorative layer, and the steel beam 3 includes steel structures of common specifications such as I-beam, "H" section steel, "T" section steel, channel steel, square steel, corrugated steel, etc. The tapered cast iron 6 in 1 is arranged vertically and the smaller diameter side of the tapered cast iron 6 in the concrete upper flange 1 is located in the lower part, and the tapered cast iron 6 in the concrete lower flange 2 is arranged vertically and in the concrete lower flange 2 The side with the smaller diameter of the tapered cast iron 6 is located at the upper part, the bottom surface of the tapered cast iron 6 in the concrete upper flange 1 is flush with the bottom surface of the steel beam mounting seat 8 at the bottom of the concrete upper flange 1, and the cone in the concrete lower flange 2 The top surface of the cast iron 6 is flush with the top surface of the top steel beam mounting seat 8 of the concrete lower flange 2. The minimum straightness of the tapered cast iron 6 is adapted to the diameter of the screw 4, and the inner thread of the tapered cast iron 6 is adapted to the screw 4 thread. Fitting, the female thread is centered on the smaller diameter side of the tapered cast iron 6.

Working process: The concrete upper flange 1 and the concrete lower flange 2 are prefabricated in the factory. When the concrete upper flange 1 and the concrete lower flange 2 are poured in the factory, the conical cast iron 6 is pre-arranged in the relative position, and then poured into the mold. Concrete, conical cast iron 6 is fixed inside by concrete, and at the same time, the upper surface of concrete upper flange 1 is laid with corresponding decorative layers according to the needs of on-site use. After the concrete upper flange 1 and concrete lower flange 2 are all processed, the concrete is placed The upper flange 1 and the concrete lower flange 2 are transported to the installation site. The steel beam 3 needs to be drilled in advance in the factory. The steel beam 3 has holes in the corresponding positions. 6. After the steel beam 3 is processed, it will be transported to the construction site. When installing on site, the top surface of the steel beam 3 should be in contact with the bottom surface of the upper flange 1 of the concrete, and the position should be adjusted so that the position of the tapered cast iron 6 is in contact with the hole of the steel beam 3. 7. The corresponding positions, the steel beam 3 and the concrete upper flange 1 are fixedly connected through the connection of the nut 5 and the screw 4, and the tightness of the mutual cooperation between the steel beam 3 and the concrete upper flange 1 is controlled by adjusting the nut 5. According to the above Method The steel beam 3 is fixedly connected with the concrete lower flange 2, and the installation can be completed. After the structural part is installed, it can be directly checked and accepted, and it can be used directly after passing the check, which can improve the assembly rate and greatly reduce the construction period on site.

Claims (6)

1. The utility model provides a full assembled steel concrete combination case roof beam which characterized in that: the steel beam comprises two steel beams (3) which are horizontally and transversely arranged, the two steel beams (3) are arranged in parallel, the upper parts of the steel beams (3) are provided with concrete top flanges (1), the concrete top flanges (1) are of a plate-shaped structure which is horizontally arranged, the bottom surfaces of the concrete top flanges (1) are provided with two steel beam mounting seats (8) which protrude downwards, the top surface of each steel beam (3) is contacted with the bottom surfaces of the corresponding steel beam mounting seats (8), the front side and the rear side of each concrete top flange (1) are provided with top flange protruding edges (9), a plurality of conical cast irons (6) are arranged inside the concrete top flanges (1), each conical cast iron (6) is of a circular table type structure, one side surface with a smaller diameter of each conical cast iron (6) is provided with a threaded hole, a screw rod (4) matched with an internal thread is arranged in each threaded hole, a nut (5) is arranged on each screw rod (4, a plurality of holes (7) are formed in the upper portion and the lower portion of the steel beam (3), the number and the positions of the holes (7) correspond to those of the conical cast iron (6), the diameter of each hole (7) is matched with that of the corresponding screw (4), a concrete lower flange (2) is arranged on the lower portion of the steel beam (3), a steel beam mounting seat (8) protruding upwards is arranged on the top surface of the concrete lower flange (2), and a plurality of conical cast iron (6) are arranged inside the concrete lower flange (2).

2. The fully assembled steel reinforced concrete composite box girder according to claim 1, characterized in that: the upper surface of the concrete upper flange (1) is provided with a decorative layer.

3. The fully assembled steel reinforced concrete composite box girder according to claim 1, characterized in that: the tapered cast iron (6) in the concrete upper flange (1) is vertically arranged, the side face with the smaller diameter of the tapered cast iron (6) in the concrete upper flange (1) is positioned at the lower part, the tapered cast iron (6) in the concrete lower flange (2) is vertically arranged, and the side face with the smaller diameter of the tapered cast iron (6) in the concrete lower flange (2) is positioned at the upper part.

4. The fully assembled steel reinforced concrete composite box girder according to claim 1, characterized in that: the bottom surface of the conical cast iron (6) in the concrete upper flange (1) is flush with the bottom surface of the steel beam mounting seat (8) at the bottom of the concrete upper flange (1), and the top surface of the conical cast iron (6) in the concrete lower flange (2) is flush with the top surface of the steel beam mounting seat (8) at the top of the concrete lower flange (2).

5. The fully assembled steel reinforced concrete composite box girder according to claim 1, characterized in that: the minimum diameter of the conical cast iron (6) is matched with the diameter of the screw (4), and the internal thread of the conical cast iron (6) is matched with the thread of the screw (4).

6. The fully assembled steel reinforced concrete composite box girder according to claim 1, characterized in that: the internal thread is positioned in the center of the side surface with the smaller diameter of the conical cast iron (6).

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