CN116044023A - Concrete Structure External Steel Beam Construction Method - Google Patents

Abstract

The invention relates to the technical field of construction of steel beam connection structures, in particular to a construction method for externally connected steel beams of concrete structures, comprising: installing a connecting plate at the place where the steel frame beam is to be connected to the steel beam, a plurality of steel bar holes are opened on the connecting plate, and the connecting plate The outer end is welded and fixed with a pre-embedded slab, and the outer side of the pre-embedded slab is parallel to the outside of the concrete and structure; the steel frame beam is hoisted in place, the concrete structural steel bars are bound, the pouring formwork is supported, and the inner side of the pouring formwork is attached to the outside of the pre-embedded slab Side; concrete pouring construction, remove the pouring formwork; connect the expansion plate on the steel beam, and fix the expansion plate and the embedded plate; the invention avoids the opening or disconnection of the pouring formwork, does not need secondary plugging, and simplifies the pouring formwork support The maintenance process shortens the construction period and reduces the construction cost; the pre-embedded slab is used as an external connection node, and the pre-embedded slab and the concrete beam form an integrated structure, which has high structural strength and low manufacturing and transportation costs.

Description

Concrete Structure External Steel Beam Construction Method

technical field

The invention relates to the technical field of construction of steel beam connection structures, in particular to a construction method for external steel beams of concrete structures.

Background technique

At present, it is not uncommon for high-rise buildings and ultra-high-rise buildings to adopt the combination of steel structure and concrete structure, which involves a connection node between concrete beams and steel beams; usually, the construction method of external steel beams in concrete structures is that in concrete components Connecting plates or steel corbels are set on the steel frame of the concrete structure. After pouring concrete, part of the connecting plates or steel corbels is exposed to the concrete structure. After the concrete reaches the preset strength, the steel beams are connected to the connecting plates or steel corbels; this method There are the following problems: 1. If the design of the connecting plate or steel corbel is weak, the problem of insufficient structural strength will occur, thereby causing potential safety hazards. If the design of the connecting plate or steel corbel is too heavy, it will be inconvenient to manufacture and transport and the cost will be high; 2. Due to The connecting plate or steel corbel is protruding. Therefore, when pouring concrete beams, it is necessary to open holes in the pouring formwork. When pouring, the gap between the hole and the connecting plate is blocked, and then pouring is carried out. During this process, the formwork is supported The operation is complicated and the grout is easy to leak, resulting in problems such as low construction efficiency, affecting the quality of concrete pouring construction, and wasting pouring raw materials.

Contents of the invention

The present invention aims to solve the above problems, thereby providing a method for constructing external steel beams of concrete structures that facilitates binding and pouring of concrete beam pouring formwork.

The present invention solves said problem, and the technical solution adopted is:

A method for constructing externally connected steel girders of concrete structures is characterized in that it comprises the following steps:

S1, processing of steel frame beams: Before construction, a connecting plate is installed at the place where the steel frame beams are to be connected to the steel beams. There are a number of steel holes on the connecting plates for piercing structural steel bars, and the connecting plates are placed outside one end of the steel frame beams. The embedded plate is welded and fixed, and the outer surface of the embedded plate is parallel to the outer surface of the concrete and the structure, and the distance between the outer surface of the embedded plate and the web plate of the steel frame beam is equal to half the width of the concrete structure;

S2, installation of concrete pouring formwork: hoist the processed steel frame beams in place, bind the concrete structural steel bars according to the design drawings, pass through the reserved steel bar holes at the intersection of structural steel bars and connecting plates, and then support the pouring formwork, pouring formwork The inner side is attached to the outer side of the embedded board;

S3, Concrete pouring: Concrete pouring construction, concrete curing, when the concrete strength meets the requirements of form removal, remove the pouring formwork;

S4, steel beam connection: connect the expansion plate on the steel beam, and weld the expansion plate and the embedded plate after the concrete strength reaches 70% of the design strength.

As preferably, the further technical scheme of the present invention is:

Step S4 is specifically, connecting the expansion plate to the web plate of the steel beam through bolts, positioning and cutting the expansion plate according to the actual concrete construction situation and the designed angle between the steel beam and the concrete structure, and waiting for the concrete strength to reach After the design strength is 70%, the expansion plate and the embedded plate are fully welded and fixed.

In step S1, a number of stiffening plates are welded and fixed on the steel frame beam, and the reinforcement plates are provided with holes through which structural steel bars can be pierced. The upper edge of the stiffening plate is welded and fixed to the upper flange of the steel frame beam, and the lower edge is The lower flange of the steel beam is welded and fixed, and the inner side of the stiffener is welded and fixed to the web of the steel beam.

Adopt the present invention of above-mentioned technical scheme, compared with prior art, its outstanding feature is:

Through this method, when the formwork is poured on the outside of the concrete beam, it only needs to be attached to the outer surface of the embedded slab, which avoids the opening or disconnection of the pouring formwork, and does not require secondary plugging, which simplifies the pouring formwork support process. The construction period is shortened and the construction cost is reduced; at the same time, the problem of pouring grout leakage is eliminated, and the waste of raw materials is avoided; the embedded slab is used as an external connection node, and the embedded slab and the concrete beam form an integrated structure, which has high structural strength and The cost of production and transportation is low.

Description of drawings

Fig. 1 is the structural representation of the connection node of steel frame beam and steel beam in the embodiment of the present invention;

Fig. 2 is a top view structural schematic diagram of a steel frame beam and a steel beam connection node in an embodiment of the present invention;

Fig. 3 is the structural representation of the concrete structure external steel beam construction method in the embodiment of the present invention;

Fig. 4 is the schematic structural view of the connecting node at the steel frame beam place in the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a connection node at a steel beam in an embodiment of the present invention.

In the figure: 1. Steel frame beam; 2. Stiffening plate; 3. Connecting plate; 4. Embedded plate; 5. Stud; 6. Steel beam; , Concrete layer.

Detailed ways

The present invention will be further described below in conjunction with the examples, the purpose is only to better understand the contents of the present invention, therefore, the examples given do not limit the protection scope of the present invention.

As shown in Figures 1 to 5, this embodiment provides a construction method for external steel beams in concrete structures, and the specific steps include:

S1, processing of steel frame beam 1: Before construction, a connection plate 3 is installed at the steel frame beam 1 to be connected to steel beam 6, and a number of reinforcement holes for piercing structural steel bars are opened on the connection plate 3, and the connection plate 3 is placed outside An embedded plate 4 is welded and fixed at one end of the steel frame beam 1, the outer surface of the embedded plate 4 is parallel to the outer surface of the concrete and the structure, and the distance between the outer surface of the embedded plate 4 and the web plate of the steel frame beam 1 is equal to half A concrete structure width.

A number of stiffening plates 2 are also welded and fixed on the steel frame beam 1. The stiffening plates 2 are provided with holes for piercing structural steel bars. The upper edge of the stiffening plate 2 is welded and fixed to the upper flange of the steel frame beam 1, and the lower edge It is welded and fixed with the lower flange of the steel frame beam 1, and the inner side of the stiffening plate 2 is welded and fixed with the web plate of the steel frame beam 1.

S2, concrete pouring formwork installation: Hoist the finished steel frame beam 1 into place, bind the concrete structural steel bars according to the design drawings, pass through the reserved steel bar holes at the intersection of the structural steel bars and the connecting plate 3, and then set up the pouring formwork, The inner side of the pouring formwork is attached to the outer side of the embedded slab 4 .

S3, Concrete pouring: Concrete pouring construction, concrete curing, when the concrete strength meets the requirements for formwork removal, remove the pouring formwork.

S4, the expansion plate 7 is connected to the web plate of the steel beam 6 through the bolt 8, and the expansion plate 7 is positioned and cut according to the actual concrete construction situation and the design angle between the steel beam 6 and the concrete structure, and the concrete After the strength reaches 70% of the design strength, the expansion plate 7 and the embedded plate 4 are fully welded and fixed.

Further, the specific node structure of the concrete structure external steel beam construction method includes a steel frame beam 1 and a steel beam 6, the steel frame beam 1 is provided with a connecting plate 3, and the connecting plate 3 is set according to the arrangement of steel bars in the concrete beam structure. There are reinforcement holes, the connecting plate 3 is placed outside the steel beam 1 and one end is connected with the embedded plate 4, and the embedded plate 4 is set parallel to the steel beam 1; the steel beam 6 is connected with the expansion plate 7, and the expansion plate 7 is placed outside One end of the steel beam 6 is welded and fixed to the outer surface of the embedded plate 4; wherein, the expansion plate 7 is connected to the web plate of the steel beam 6 through bolts 8; the width W1 of the embedded plate 4 is equal to the width W2 of the upper flange of the steel beam 6 The relationship between satisfies, 0.5*W2≤W1≤W2.

Further, in order to enhance the bonding force between the steel structure and the concrete in the connection node area, several studs 5 are arranged at intervals on the inner side of the embedded slab 4 , and the studs 5 are arranged perpendicular to the steel beam 1 .

Further, the length of the expansion plate 7 placed outside the steel beam 6 is 10mm-18mm; when in use, the concrete pouring surface will have actual deviations compared with the design, and the external length of the expansion plate 7 will be lengthened to facilitate the expansion and contraction according to the actual concrete construction conditions. slab 7 for positioning and cutting; at the same time, there is a situation that the inclined steel beam 6 needs to be connected to the concrete beam during construction. It can be cut, which improves the adaptability of the telescopic plate 7.

Further, in order to strengthen the structural stability of the steel frame beam 1, a stiffening plate 2 is also arranged in the steel frame beam 1, and the stiffening plate 2 is arranged perpendicular to the steel frame beam 1, and the upper edge of the stiffening plate 2 and the upper edge of the steel frame beam 1 The flange is welded and fixed, the lower edge is welded and fixed to the lower flange of the steel frame beam 1, and the inner side of the stiffener 2 is welded and fixed to the web of the steel frame beam 1; at the same time, in order to improve the bonding force between the steel frame beam 1 and the concrete layer 10 , a number of anchor bars 9 are evenly distributed on the steel frame beam 1 .

The invention avoids opening or disconnection of the pouring formwork, does not need secondary plugging, simplifies the pouring formwork support process, shortens the construction period, and reduces the construction cost; at the same time, the problem of pouring slurry leakage is eliminated, and the loss of raw materials is avoided. Waste; by using the embedded slab 4 as an external connection node, the embedded slab 4 and the concrete beam form an integral structure, which has high structural strength and low manufacturing and transportation costs.

The above description is only a preferred feasible embodiment of the present invention, and does not therefore limit the scope of rights of the present invention. All equivalent changes made by using the description of the present invention and the contents of the accompanying drawings are included in the scope of rights of the present invention. .

Claims (3)

1. A concrete structure external steel beam construction method is characterized in that, comprises the steps: S1, processing of steel frame beams: Before construction, a connecting plate is installed at the place where the steel frame beams are to be connected. And the outer side of the structure, the distance between the outer side of the embedded slab and the web of the steel beam is equal to half the width of the concrete structure; S2, installation of mixed pouring formwork: hoist the processed steel frame beams in place, bind the concrete structural steel bars according to the design drawings, bind and fix the pouring formwork, and fit the inner side of the pouring formwork to the outer side of the embedded slab; S3, Concrete pouring: Concrete pouring construction, concrete curing, when the concrete strength meets the requirements of form removal, remove the pouring formwork; S4, steel beam connection: connect the expansion plate on the steel beam, and weld the expansion plate and the embedded plate after the concrete strength reaches 70% of the design strength. 2. The construction method of external steel girders in concrete structures according to claim 1, characterized in that: step S4 is specifically, the telescopic plate is connected to the web plate of the steel girder by bolts, according to the actual concrete construction situation and the steel girder and concrete According to the design angle between the structures, the expansion plate is positioned and cut. After the concrete strength reaches 70% of the design strength, the expansion plate and the pre-embedded plate are fully welded and fixed. 3. The construction method of external steel girders in concrete structures according to claim 1, characterized in that: in step S1, some stiffening plates are also welded and fixed on the steel-framed beams, and the upper edge of the stiffening plates is connected to the upper flange of the steel-framed beams. Welding and fixing, the lower edge is welded and fixed to the lower flange of the steel frame beam, and the inner side of the stiffener is welded and fixed to the web plate of the steel frame beam.

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