CN217379842U - Prefabricated assembled combination reinforced structure of concrete beam - Google Patents

Abstract

The utility model discloses a precast assembled combination reinforced structure of concrete beam belongs to the concrete reinforcement field. The loaded down with trivial details and limited problem of bearing capacity of current concrete beam reinforcement construction, the utility model provides a prefabricated assembled combined reinforcement structure of concrete beam, including being used for being connected fixed U-shaped frid through the chemical crab-bolt with former concrete beam, former concrete beam is T shape cross-section roof beam, leaves the clearance between U-shaped frid and the former concrete beam, the clearance intussuseption is filled with cement base grout material, and the internal surface of U-shaped frid is provided with a plurality of peg, the surface of former concrete beam is provided with a plurality of shear key, and a plurality of peg and a plurality of shear key are staggered arrangement, be provided with a shear key between two pegs promptly. The utility model discloses can increase substantially the bending resistance bearing capacity and the anti bearing capacity of cutting of component. Meanwhile, the construction efficiency is high, the requirements of construction simplicity, bearing capacity improvement and unified fire resistance and durability are met, and the construction method has a high application prospect.

Description

Prefabricated assembled combination reinforced structure of concrete beam

Technical Field

The utility model belongs to the technical field of the concrete reinforcement, more specifically say, relate to a precast assembled combined reinforcement structure of concrete beam.

Background

For concrete beams, the existing reinforcing method mainly comprises the steps of adhering carbon fibers, adhering steel, wrapping steel and enlarging the section for reinforcement. Wherein, the carbon fiber and the sticky steel are simple and convenient to construct, but the improvement range of the bearing capacity of the member is limited (within 40 percent); the steel-clad reinforcement is completely bonded with the original component by structural adhesive, so that the cost is high, and the steel-clad reinforcement is durable and has general fire resistance; the bearing capacity of the member is greatly improved by increasing the section reinforcement, but the construction is complicated (a large amount of wet operation is needed, a formwork is required, and the workload of installing the steel bars is large and the difficulty is high). Therefore, it is difficult to unify the conventional reinforcing methods in terms of the easiness of construction, the width of the load bearing capacity of the member, and the fire-resistant durability.

For example, the Chinese patent application No. CN201610163624.4, published as 2016, 3, 22, discloses a method for quickly reinforcing a concrete beam, wherein a U-shaped steel sleeve matched with the cross section of the concrete beam is manufactured by a cold bending or welding method, and bolt holes are reserved; repairing the surfaces of the two sides of the concrete beam; drilling through bolt holes on the side surfaces of the concrete beams according to the positions of the bolt holes reserved in the U-shaped steel sleeves; coating building structural adhesive on a bonding area of a U-shaped steel sleeve web plate, and then sleeving the U-shaped steel sleeve on the concrete beam to enable the U-shaped steel sleeve to meet the design height, wherein the bonding area of the U-shaped steel sleeve web plate is tightly attached to the two side surfaces of the concrete beam; and injecting bar planting glue into the through bolt hole, installing the through bolt, screwing a nut, and fixing the U-shaped steel sleeve and the concrete beam together to form a box-type structure. The disadvantages of the patent are that: although the construction steps are simple, the construction period is short, the bonding area of the U-shaped steel sleeve web plate is close to the concrete beam, the concrete beam is easily interfered by the external environment to be damaged, and the integral rigidity is poor.

Also for example, chinese patent application No. CN202110810246.5, published as 2021, 7 and 18, discloses a method for installing a post-anchored reinforcement for reinforcing a concrete beam, comprising the steps of: firstly, performing post-anchoring reinforcing steel bar planting paying-off on the bottom of a beam reinforced by carbon fiber cloth or carbon fiber plates, and determining the position of the post-anchoring reinforcing steel bar planting; step two, blanking a U-shaped hoop at a paying-off position, and filling gaps between the U-shaped hoop and the concrete beam with sticky steel glue; step three, after the U-shaped hoop is installed, bending the rear anchoring reinforcing steel bar into an L shape and welding the L shape to the bottom of the U-shaped hoop; and step four, binding the post-anchoring reinforcing steel bars. The disadvantages of the patent are that: although the damage of the rear anchoring reinforcing steel bars to the reinforced concrete beam bottom carbon fiber cloth or carbon fiber plate can be avoided to a certain extent, the gaps between the U-shaped hoops and the concrete beam are filled with the sticky steel glue, the whole structure is durable, the fire resistance is general, and the damage is easy to occur

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

To the loaded down with trivial details and limited problem of bearing capacity of current concrete beam reinforcement construction, the utility model provides a concrete beam's prefabricated assembled combination reinforced structure. The utility model discloses can increase substantially the bending resistance bearing capacity and the anti bearing capacity of cutting of component, easily operate when guaranteeing to connect firmly. Simultaneously the utility model discloses the efficiency of construction is high, has accomplished the construction simplicity, has increased substantially the unified requirement such as bearing capacity and fire-resistant durability, has higher use prospect and wider suitability.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a precast assembled combined reinforcement structure of concrete beam, including being used for being connected fixed U-shaped frid through chemical crab-bolt with former concrete beam, former concrete beam is T shape cross-section roof beam, leave the clearance between U-shaped frid and the former concrete beam, the clearance intussuseption is filled with cement base grout material, and the internal surface of U-shaped frid is provided with a plurality of toggle, the surface of former concrete beam is provided with a plurality of shear key, and a plurality of toggle is staggered arrangement with a plurality of shear key, be provided with a shear key between two toggle promptly.

Furthermore, when the U-shaped groove plates are connected with the original concrete beam in a closed mode, the end portions of the two vertical plates in the U-shaped groove plates are respectively connected with a horizontal plate, and the chemical anchor bolts penetrate through the horizontal plates and are fixedly connected with the horizontal section of the original concrete beam.

Furthermore, when the U-shaped frid is the opening with former concrete beam and is connected, two vertical boards in the U-shaped frid are equallyd divide and are connected fixedly through the vertical section of chemical crab-bolt with former concrete beam, and the top of U-shaped frid leaves the distance with the horizontal segment of former concrete beam.

Furthermore, the width of a gap between the U-shaped groove plate and the original concrete beam is kept between 80 mm and 150 mm.

Furthermore, the shear key is a twisted steel bar, one end of the twisted steel bar is implanted into the original concrete beam, the diameter of the twisted steel bar is 12-22 mm, and the length of the twisted steel bar is 60-120 mm.

Furthermore, the steel plate also comprises outer-coating section steel which is fixed at the bottom of the U-shaped groove plate.

Furthermore, the outer-wrapping section steel is in an inverted T shape or an inverted pi shape.

3. Advantageous effects

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

(1) the utility model changes the prior art that the U-shaped groove plate and the original concrete beam are connected and fixed by the structural adhesive, and the gap between the U-shaped groove plate and the original concrete beam is filled with the high-strength, self-compacting and shrinkage-free cement-based grouting material, thereby ensuring that the filling is compact and simultaneously playing a certain connecting role, and the durability and the fire resistance of the grouting material are outstanding; meanwhile, the connection between the U-shaped channel plate and the original concrete beam is further enhanced through the studs and the shear keys, so that the bending resistance bearing capacity and the shear resistance bearing capacity of the component are greatly improved; the studs and the shear keys are arranged in a staggered manner, so that the interference is avoided, and the integral connection strength is enhanced; the integral structure is simple, the connection is ensured to be stable, the operation is easy, and the construction cost and the labor cost are reduced;

(2) the U-shaped groove plate can be connected with the original concrete beam in a closed or open manner, so that the autonomy of selection is greatly increased, a user can adjust the U-shaped groove plate according to the field condition, and the flexibility of the whole construction is improved; the connection between the U-shaped groove plate and the original concrete beam is firmer through closed connection, the filling of the cement-based grouting material is more convenient through open connection, the cost investment is reduced, the length is increased, a reasonable mode is selected according to needs, the strength is ensured, and meanwhile the applicability is increased;

(3) the utility model limits the clearance between the U-shaped groove plate and the original concrete beam, avoids that too small cement-based grouting material which is poured into the groove plate is too little to meet the strength requirement, and avoids resource waste caused by too large groove plate; and the twisted steel bar is used as a shear key, so that the materials are convenient to obtain and the performance is excellent; meanwhile, the outer-wrapping section steel at the bottom of the U-shaped groove plate and the U-shaped groove plate form a combined section, so that the bearing capacity of the component is further improved;

(4) the construction method of the utility model does not need formwork erecting and a large amount of wet operation, thus greatly improving the construction efficiency; and a new combination mode of the U-shaped groove plate, the cement-based grouting material, the stud and the shear key is adopted, so that the reinforced structure and the original concrete beam act together, the bearing capacity of the member is greatly improved, the quality is ensured more easily by integral construction, the construction is simple, the unified requirements of construction simplicity, large improvement of the bearing capacity, fire resistance, durability and the like are met, and the combined type concrete beam has a higher use prospect and wider applicability.

Drawings

Fig. 1 is a schematic view of an installation of the present invention;

fig. 2 is another schematic installation diagram of the present invention;

FIG. 3 is a schematic structural view of the outer-coated steel of the present invention;

fig. 4 is another schematic structural diagram of the outer-coated steel of the present invention.

In the figure: 1. original concrete beam; 2. a chemical anchor bolt; 3. a U-shaped groove plate; 4. cement-based grouting material; 5. a shear key; 6. a stud; 7. and (5) coating profile steel outside.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

The utility model provides a precast assembled combination reinforced structure of concrete beam, its is including being used for being connected fixed U-shaped frid 3 through chemical crab-bolt 2 with former concrete beam 1, and 2 anchor power of chemical crab-bolt are strong, and the shape is installed swiftly simultaneously with pre-buried, solidifies rapidly, very big save the engineering time. Therefore, the original concrete beam 1 and the U-shaped groove plate 3 are connected and fixed by the chemical anchor bolts 2, so that the operation is simple and convenient, and the connection strength is ensured. Former concrete beam 1 is T shape cross-section roof beam, and former concrete beam 1 includes horizontal segment and vertical section promptly, forms T shape structure, and U-shaped frid 3 includes two vertical boards promptly to and connect the bottom plate of two vertical boards, form the ascending U-shaped structure of opening. The U-shaped groove plate 3 can be selectively connected to the horizontal section or the vertical section of the original concrete beam 1, and can be selected according to actual field requirements. Specifically, as shown in fig. 1, when the U-shaped frid 3 is the closure with former concrete beam 1 and is connected, a horizontal plate is connected respectively to the tip of two vertical boards in the U-shaped frid 3 promptly, the horizontal segment in two horizontal plates and former concrete beam 1 is parallel arrangement, chemistry crab-bolt 2 passes the horizontal plate in proper order and is connected fixedly with former concrete beam 1's horizontal segment, thereby form a closed connection, the leakproofness of whole structure has been strengthened in this kind of closed connection, avoid it to receive external environment's interference when joint strength is more firm, more difficult emergence damage. Or as shown in fig. 2, when the U-shaped groove plate 3 is connected with the original concrete beam 1 in an open manner, two vertical plates in the U-shaped groove plate 3 are connected and fixed with the vertical section of the original concrete beam 1 through the chemical anchor bolt 2, and the top of the U-shaped groove plate 3 is away from the horizontal section of the original concrete beam 1, i.e., the U-shaped groove plate 3 is not overlapped with the horizontal section of the original concrete beam 1, so that a distance exists, and an open connection manner is formed. This distance is on the one hand for the convenience of filling of follow-up cement base grouting material 4, and on the other hand avoids producing the interference influence to the horizontal segment of former concrete beam 1. The open type connection mode is selected, so that the cement-based grouting material 4 is filled more conveniently, and the cost input is reduced. The connection mode between the original concrete beam 1 and the U-shaped groove plate 3 greatly increases the independence of selection, a user can adjust the connection mode according to the field condition, the flexibility of the whole construction is improved, a reasonable mode is selected as required, and the applicability is increased while the strength is ensured.

No matter which kind of connected mode of selection, the clearance all can be left between U-shaped frid 3 and the former concrete beam 1, this embodiment has cement base grouting material 4 in the clearance intussuseption, because of U-shaped frid 3 can not laminate with former concrete beam 1 completely, will certainly produce the clearance, pack cement base grouting material 4 in the clearance, cement base grouting material 4 has the high strength, early strength, the levelling characteristic of flowing automatically, and no shrink, can guarantee to pack the dense room between U-shaped frid 3 and the former concrete beam 1, play certain connection effect simultaneously. This application is fixed U-shaped frid 3 and former concrete beam 1 through adopting chemistry crab-bolt 2, packs cement base grouting material 4 in the clearance between the two simultaneously, has changed in the past that U-shaped frid need carry out fixed connection through adhesive steel glue and concrete beam, and its durability of adhesive steel glue is general with fire resistance, receives external environment's interference easily, and its viscidity can descend gradually, leads to the relatively poor problem of joint strength then. Furthermore, in the embodiment, the gap width between the U-shaped groove plate 3 and the original concrete beam 1 is kept between 80 mm and 150mm, and the gap width refers to the horizontal distance between the vertical section in the original concrete beam 1 and the vertical edge in the U-shaped groove plate 3. The gap width is limited, so that the problem that when the gap width is too small, the amount of the filled cement-based grouting material 4 is limited, the filling strength in the whole gap is weakened, and the whole connection strength is influenced is avoided; when the gap width is too large, the strength is ensured, and simultaneously the waste of the cement-based grouting material 4 is caused, so that the waste of resources brings the increase of the cost.

Simultaneously, for the further connected action between reinforcing U-shaped frid 3 and the former concrete beam 1, be provided with a plurality of peg 6 at the internal surface welding of U-shaped frid 3, peg 6 is the cylinder head peg, and sets up the diameter of peg 6 at 16 ~ 22mm, and length is at 50 ~ 120mm, and peg 6 draws materials conveniently and the enhancement joint strength that can be very big. The surface (the surface that corresponds with all internal surfaces of U-shaped frid 3) of former concrete beam 1 all is provided with a plurality of shear key 5, in this embodiment with shear key 5 for the twisted steel, adopts the twisted steel as shear key 5, and convenient for material selection and performance are excellent. One end of the twisted steel bar is implanted into the original concrete beam 1, the diameter of the twisted steel bar is 12-22 mm, and the length of the twisted steel bar is 60-120 mm. And a plurality of peg 6 and a plurality of shear key 5 are staggered, are provided with a shear key 5 between two pegs 6 promptly, strengthen holistic joint strength when avoiding taking place to interfere when the construction.

The utility model changes the prior art that the U-shaped plate and the concrete beam are connected and fixed by structural adhesive, and adopts the cement-based grouting material 4 which is high in strength, self-compacting and free of shrinkage and is filled in the gap between the U-shaped plate and the concrete beam, thereby ensuring that the filling is compact and simultaneously playing a certain connecting role, and the durability and the fire resistance of the grouting material are outstanding; meanwhile, the connection between the U-shaped channel plate 3 and the original concrete beam 1 is further enhanced through the studs 6 and the shear keys 5, so that the bending resistance bearing capacity and the shear resistance bearing capacity of the member are greatly improved; the studs 6 and the shear keys 5 are arranged in a staggered manner, so that the interference is avoided, and the integral connection strength is enhanced; overall structure is simple, and easy operation when guaranteeing to connect firmly reduces construction cost and human cost.

Example 2

Basically as in embodiment 1, in order to further increase the bearing capacity of the modified original concrete beam 1, as shown in fig. 3 and 4, the modified original concrete beam further comprises profile steels 7, and the profile steels 7 are fixed at the bottom of the U-shaped channel plate 3. Specifically, the outer clad steel 7 may have a cross-sectional configuration of various shapes according to the magnitude of the load-bearing capacity. Preferably, the outer-coated steel 7 is in an inverted T shape or an inverted pi shape, the outer-coated steel 7 in the shape is wide in source, simple to manufacture and free of complex processes, construction efficiency is further improved, and cost is reduced. The outer-coated section steel 7 and the U-shaped groove plate 3 form an I-shaped or box-shaped combined section integrally, and the bearing capacity of the reinforced original concrete beam 1 can be greatly improved.

A construction method of a prefabricated combined reinforcement structure using a concrete beam as described above, comprising the steps of:

s1: manufacturing a U-shaped groove plate 3, welding studs 6 on the inner surface of the U-shaped groove plate 3, and reserving mounting holes for inserting chemical anchor bolts 2 on the U-shaped groove plate 3;

s2: repairing the surface of the original concrete beam 1; specifically, the repairing treatment comprises roughening treatment on the surface of the original concrete beam 1, so that subsequent pouring and subsequent other construction of the cement-based grouting material 4 are facilitated, and influence on the subsequent construction due to low surface quality of the original concrete beam 1 is avoided;

s3: after the repairing treatment, according to the positions of the studs 6 in the U-shaped groove plates 3, the shear keys 5 are implanted on the surfaces of the original concrete beams 1 corresponding to the two adjacent studs 6; meanwhile, a connecting hole is reserved in the original concrete beam 1 at a position corresponding to the mounting hole of the U-shaped groove plate 3;

s4: and the chemical anchor bolts 2 sequentially penetrate through mounting holes in the U-shaped groove plates 3 and connecting holes in the original concrete beam 1, so that the U-shaped groove plates 3 and the original concrete beam 1 are fixed, and the cement-based grouting material 4 is poured. It should be noted that the pouring of the cement-based grouting material 4 and the fixing of the chemical anchor bolt 2 can be performed in a corresponding sequence according to the connection mode selected on site, and the basic principle is that the construction is convenient.

The construction method of the utility model does not need formwork erecting and a large amount of wet operation, thus greatly improving the construction efficiency; and a new combination mode of the U-shaped trough plate 3, the cement-based grouting material 4, the stud 6 and the shear key 5 is adopted, so that the reinforced structure and the original concrete beam 1 act together, the bearing capacity of the component is greatly improved, the quality is ensured more easily by the whole construction, the construction is simple, the unified requirements of construction simplicity, large improvement of the bearing capacity, fire resistance, durability and the like are met, and the novel combined concrete beam has a higher use prospect and wider applicability.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims (7)

1. The utility model provides a precast assembled combination reinforced structure of concrete beam which characterized in that: including being used for being connected fixed U-shaped frid (3) through chemical crab-bolt (2) with former concrete beam (1), former concrete beam (1) is the cross-section roof beam of T shape, leave the clearance between U-shaped frid (3) and former concrete beam (1), the clearance intussuseption is filled with cement base grout material (4), and the internal surface of U-shaped frid (3) is provided with a plurality of peg (6), the surface of former concrete beam (1) is provided with a plurality of shear key (5), and a plurality of peg (6) are staggered arrangement with a plurality of shear key (5), be provided with one shear key (5) between two pegs (6) promptly.

2. The precast assembled combination reinforcing structure of a concrete beam according to claim 1, wherein: when the U-shaped groove plate (3) is connected with the original concrete beam (1) in a closed manner, the end parts of two vertical plates in the U-shaped groove plate (3) are respectively connected with a horizontal plate, and a chemical anchor bolt (2) penetrates through the horizontal plate to be connected and fixed with the horizontal section of the original concrete beam (1).

3. The precast assembled combination reinforcement structure of a concrete beam according to claim 1, wherein: when U-shaped frid (3) are the opening with former concrete beam (1) and are connected, two vertical boards in U-shaped frid (3) are equallyd divide and are connected fixedly through the vertical section of chemical crab-bolt (2) with former concrete beam (1), and the top of U-shaped frid (3) leaves the distance with the horizontal segment of former concrete beam (1).

4. The precast assembled combination reinforcement structure of a concrete beam according to claim 1, wherein: the width of a gap between the U-shaped groove plate (3) and the original concrete beam (1) is kept between 80 mm and 150 mm.

5. The precast assembled combination reinforcement structure of a concrete beam according to claim 4, wherein: the shear key (5) is a twisted steel, one end of the twisted steel is implanted into the original concrete beam (1), the diameter of the twisted steel is 12-22 mm, and the length of the twisted steel is 60-120 mm.

6. The precast assembled combination reinforcement structure of a concrete beam according to claim 1 or 4, wherein: the steel plate is characterized by further comprising outer-wrapping section steel (7), wherein the outer-wrapping section steel (7) is fixed at the bottom of the U-shaped groove plate (3).

7. The precast assembled combination reinforcement structure of a concrete beam according to claim 6, wherein: the outer-coated steel (7) is in an inverted T shape or an inverted pi shape.

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