CN211114954U

CN211114954U - Beam slab reinforcing structure of existing building

Info

Publication number: CN211114954U
Application number: CN201921727723.6U
Authority: CN
Inventors: 邓智文; 梁军; 谢钧; 陈一乔; 李勇军; 陈春光; 张澄铎; 关家豪; 罗国彰; 张春辉
Original assignee: Guangdong Construction Engineering Group Co Ltd
Current assignee: Guangdong Construction Engineering Group Co Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-07-28
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a beam slab reinforced structure of existing building, including roof beam and the floor of establishing at roof beam top, all be provided with reinforcement parts on roof beam and the floor, reinforcement parts pass through the adhesive bonding on original beam slab structure and fix through the crab-bolt, reinforcement parts on roof beam and the floor are connected as an organic whole through the screw rod simultaneously, this reinforcement structure wholly is the frame-type and forms composite construction atress mode with original beam slab, effectively improved the stress state of original structure, improved beam slab bending resistance, shear resistance, can restrict the production and the development of original structure crack simultaneously, strengthened the bearing capacity and the durability of building; the reinforced structure is small in size increase and short in construction period of the original beam slab structure, and is more energy-saving and environment-friendly compared with a newly-built reinforced concrete structure.

Description

Beam slab reinforcing structure of existing building

Technical Field

The utility model relates to an existing building reinforcement technical field specifically is a beam slab reinforced structure of existing building.

Background

The beam plate is the combination of the interacting beams and plates in the floor; the beam and the plate in the integrally cast floor system are mutually integral and closely connected with each other, and are stressed and deformed together.

With the development of times and the improvement of the economic level of China, some early building structures can not meet the requirements of the prior art from both durability and use functions. Wherein, part of old buildings are located in the commercial and luxurious sections of the urban center, and many of the old buildings are landmark buildings of an era, and the complete dismantling and reconstruction not only has great influence on the lives and the environments of surrounding residents, but also greatly damages the protection and the inheritance of the historical culture of the buildings. Therefore, the old buildings which need to be rebuilt and are not suitable for being dismantled and rebuilt are increasingly treated by adopting a construction method for reinforcing the structure of the original buildings.

At present, a common existing building reinforcing mode is to newly build a reinforced concrete structure on the basis of an original beam slab, the reinforcing mode has larger size increase of the original structure, so that the usable area is reduced, and meanwhile, the mode has a longer construction period and is not beneficial to the social requirement of energy conservation and environmental protection.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the problem and not enough of the aforesaid existence, provide one kind and can obviously improve the bearing capacity and the durability of building, the beam slab reinforced structure of existing building to original beam slab structure increase size is little, the time limit for a project is short, energy-concerving and environment-protective simultaneously.

The purpose of the utility model is realized through the following technical scheme: the beam plate reinforcing structure of the existing building comprises a beam and a floor slab arranged at the top of the beam, wherein a connecting part and a plurality of U-shaped steel plate hoops which are arranged at intervals are fixedly adhered to the beam through an adhesive, and the U-shaped steel plate hoops are tightly hooped on the outer sides of the connecting part and the beam and are fixed through anchor bolts; the floor is provided with a plurality of first through holes vertically penetrating through the floor, the first through holes are transversely arranged on two sides of the beam in a line and have a certain distance with the side surface of the beam, first screw rods are implanted into the first through holes and are used for fixing the first screw rods with the floor, the upper ends of the first screw rods protrude out of the top surface of the floor, and the lower ends of the first screw rods protrude out of the bottom surface of the floor; the top surface of the floor slab is fixedly provided with a first strip-shaped plate element with a screw hole in an adhesive manner, the bottom surface of the floor slab is fixedly provided with a fourth strip-shaped plate element with a screw hole in an adhesive manner, and the first strip-shaped plate element is opposite to and parallel to the fourth strip-shaped plate element; the lower end of the first screw penetrates through a screw hole in the fourth strip-shaped plate element and is fixedly welded with the upper end part of the U-shaped steel plate hoop, and the upper end of the first screw penetrates through the screw hole in the first strip-shaped plate element and is provided with a nut to fix the first strip-shaped plate element on the top surface of the floor slab.

Preferably, the floor slab is also provided with a plurality of second through holes vertically penetrating through the floor slab, the second through holes are longitudinally arranged and are provided with a plurality of rows at intervals, second screws are implanted into the second through holes and fix the second screws with the floor slab, the upper ends of the second screws protrude out of the top surface of the floor slab, and the lower ends of the second screws protrude out of the bottom surface of the floor slab; the floor top surface is fixedly provided with a second strip-shaped plate with a screw hole through adhesive bonding, the floor bottom surface is fixedly provided with a third strip-shaped plate with a screw hole through adhesive bonding, the lower end of a second screw rod penetrates through the screw hole in the third strip-shaped plate and is provided with a nut to fix the third strip-shaped plate on the floor bottom surface, and the upper end of the second screw rod penetrates through the screw hole in the second strip-shaped plate and is provided with a nut to fix the second strip-shaped plate on the floor top surface.

Through the arrangement, the integral reinforcing structure forms a frame structure wrapping the original beam-slab structure, the integral reinforcing structure and the original beam-slab form a composite structure stress mode, the adhesion degree between the adhesive and the reinforcing part as well as between the original beam-slab structure is effectively improved by a bonding anchoring and reinforcing mode, the stress state of the original structure is improved, the bending resistance and the shearing resistance of the beam-slab are improved, the generation and the development of cracks of the original structure can be restricted, and the bearing capacity and the durability of a building are improved; meanwhile, the reinforced structure is small in size increase and short in construction period of the original beam slab structure, and is more energy-saving and environment-friendly compared with a newly-built reinforced concrete structure.

Preferably, the carbon fiber cloth is fixed on the floor slab through an adhesive in a bonding manner, and the carbon fiber cloth is longitudinally and/or transversely arranged and is adhered to the top surface and the bottom surface of the floor slab at intervals in multiple rows, so that the stressed bearing capacity of the floor slab can be improved, the ductility of the structure is enhanced, and the anti-seismic performance and the anti-cracking capacity of the structure are improved.

Preferably, the connecting part comprises two angle steels and two steel base plates, the two angle steels are arranged on two bottom corners of the beam respectively, the steel base plates are arranged on the tops of two side surfaces of the beam, and the U-shaped steel plate hoops wrap the angle steels and the steel base plates, are bonded by an adhesive and are fixed by anchor bolts at the same time; the length of the angle steel is equal to that of the beam; the top and the floor bottom laminating of steel backing plate, the bottom of steel backing plate and the bottom parallel and level of first screw rod, the width of steel backing plate and the width of U-shaped steel plate hoop equal, and the thickness of steel backing plate thickness and angle steel equals and is 5 ~ 10 mm.

Through the setting, pass through the fixed angle steel that sets up rather than length equal of adhesive bonding in the roof beam bottom, pass through the fixed steel backing plate that sets up thickness and angle steel equal of adhesive bonding in the roof beam top, rethread adhesive and crab-bolt are fixed the U-shaped steel sheet hoop on the roof beam, are showing the stress state who has improved original building structure, have improved the bending resistance of beam slab structure, ability and the bearing capacity shear, the steel backing plate has effectively guaranteed the reinforcement adhesion degree of the vertical section of U-shaped steel sheet hoop.

Preferably, the connecting part comprises a first steel plate pressing strip with the thickness of 5-10 mm, the first steel plate pressing strip and the beam are equal in length and are bonded at the bottom of the beam through an adhesive, and the first steel plate pressing strip is wrapped by the U-shaped steel plate hoop, bonded through the adhesive and fixed through an anchor bolt.

Through the arrangement, the first steel plate pressing strip with the same length as the beam bottom is fixedly arranged at the bottom of the beam through the adhesive in a bonding mode, and the U-shaped steel plate hoop is fixed on the beam through the adhesive and the anchor bolt, so that the stress state of the original building structure is obviously improved, and the bending resistance, the shearing resistance and the bearing capacity of the beam-slab structure are improved.

Preferably, the connecting part further comprises a second steel plate pressing strip, the second steel plate pressing strip is bonded to the tops of the two side faces of the beam through an adhesive, the first steel plate pressing strip is wrapped by the U-shaped steel plate hoop, and the second steel plate pressing strip is bonded to the U-shaped steel plate hoop and fixed through an anchor bolt.

Through the arrangement, on the basis that the connecting part is provided with the first steel plate pressing strip, the second steel plate pressing strip which is 5-10 mm in thickness is bonded to the top of the two side faces of the beam through the adhesive and then is wrapped and fixed through the U-shaped steel plate hoop, the stress state of the original building structure is obviously improved, and the bending resistance, the shearing resistance and the bearing capacity of the beam-slab structure are improved.

Preferably, the bottom end of the U-shaped steel plate hoop is further provided with an I-shaped steel tightly attached to the U-shaped steel plate hoop, I-shaped steel stand columns are arranged on the lower sides of two ends of the I-shaped steel to form a gantry-shaped support frame, the bottom end of the U-shaped steel plate hoop is welded with the I-shaped steel, and bears the force together with the original concrete beam to improve the bearing capacity of the beam.

Preferably, the thickness of U-shaped steel plate hoop is 5 ~ 10mm, and two liang of U-shaped steel plate hoops interval 200 ~ 300mm and mutual parallel arrangement.

The utility model has the advantages that: 1. the utility model has the advantages of fast construction speed, short completion period, and saving construction period and labor force; 2. the utility model discloses a reinforcement component adopts the dual fixed mode to show the standing degree of the degree of contact that has improved the adhesive, and the reinforced structure wholly is frame construction and wraps up original beam slab structure, shows the stress state who improves original beam slab structure, has improved beam slab bending resistance, shear resistance, can restrict the production and the development of original beam slab structure crack simultaneously, improves the bearing capacity and the durability of building; 3. the utility model discloses a reinforced structure is little to original beam slab structure increase size, and the reinforcement material price of use is low, has reduced reinforced concrete's waste and has dismantled the environmental pollution that old building caused, has fine economic benefits.

Drawings

FIG. 1 is a schematic view of the first and second overall structures of the embodiment of the present invention;

FIG. 2 is a schematic bottom view of the first, second and fourth embodiments of the present invention;

Fig. 3 is a schematic cross-sectional view of an embodiment of the present invention;

Fig. 4 is a schematic view of an anchor bolt reinforcing cross-section according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the third overall structure of the embodiment of the present invention;

Fig. 6 is a schematic bottom view of the embodiment of the present invention;

Fig. 7 is a schematic diagram of a three-section structure according to an embodiment of the present invention;

Fig. 8 is a schematic view of a sixth overall structure of the embodiment of the present invention;

Fig. 9 is a schematic bottom view of an embodiment of the present invention;

Fig. 10 is a schematic structural view of a top surface of a six-floor slab in an embodiment of the present invention;

Fig. 11 is a schematic view of a nine-block structure according to an embodiment of the present invention;

Fig. 12 is a schematic diagram of a nine-section structure according to an embodiment of the present invention;

In the figure, 1-beam, 2-floor, 3-U-shaped steel plate hoop, 4-first strip plate, 5-second strip plate, 6-third strip plate, 7-first screw, 8-second screw, 9-angle steel, 10-steel backing plate, 11-first steel plate pressing strip, 12-second steel plate pressing strip, 13-fourth strip plate, 14-carbon fiber cloth, 15-I-steel and 16-I-steel upright post.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

The beam plate reinforcing structure of the existing building comprises a beam 1 and a floor slab 2 arranged on the top of the beam 1, wherein a connecting part and a plurality of U-shaped steel plate hoops 3 which are arranged at intervals are fixedly adhered on the beam 1 through an adhesive, and the U-shaped steel plate hoops 3 are tightly hooped on the outer sides of the connecting part and the beam 1 and are fixed through anchor bolts; the thickness of the U-shaped steel plate hoops 3 is 5-10 mm, every two U-shaped steel plate hoops 3 are spaced by 200-300 mm and are arranged in parallel; the floor slab 2 is provided with a plurality of first through holes vertically penetrating through the floor slab 2, the first through holes are transversely arranged on two sides of the beam 1 in a line and have a certain distance with the side surface of the beam 1, a first screw 7 is implanted into the first through holes and fixes the first screw 7 and the floor slab 2, the upper end of the first screw 7 protrudes out of the top surface of the floor slab 2, and the lower end of the first screw 7 protrudes out of the bottom surface of the floor slab 2; the top surface of the floor slab 2 is fixedly provided with a first strip-shaped plate element 4 with a screw hole through adhesive bonding, the bottom surface of the floor slab 2 is fixedly provided with a fourth strip-shaped plate element 13 with a screw hole through adhesive bonding, and the first strip-shaped plate element 4 is opposite to and parallel to the fourth strip-shaped plate element 13; the lower end of the first screw rod 7 penetrates through a screw hole in the fourth strip-shaped plate element 13 and is fixedly welded with the upper end part of the U-shaped steel plate hoop 3, and the upper end of the first screw rod 7 penetrates through a screw hole in the first strip-shaped plate element 4 and is provided with a nut to fix the first strip-shaped plate element 4 on the top surface of the floor slab 2.

The floor slab 2 is also provided with a plurality of second through holes vertically penetrating through the floor slab 2, the second through holes are longitudinally arranged and are provided with a plurality of rows at intervals, second screws 8 are implanted into the second through holes and fix the second screws 8 with the floor slab 2, the upper ends of the second screws 8 protrude out of the top surface of the floor slab 2, and the lower ends of the second screws 8 protrude out of the bottom surface of the floor slab 2; the second strip-shaped plate 5 with the screw hole is fixedly arranged on the top surface of the floor slab 2 through adhesive bonding, the third strip-shaped plate 6 with the screw hole is fixedly arranged on the bottom surface of the floor slab 2 through adhesive bonding, the lower end of the second screw rod 8 penetrates through the screw hole in the third strip-shaped plate 6 and is fixed on the bottom surface of the floor slab 2 through a mounting nut, and the upper end of the second screw rod 8 penetrates through the screw hole in the second strip-shaped plate 5 and is fixed on the top surface of the floor slab 2 through the mounting nut.

The floor slab 2 is adhered and fixed with carbon fiber cloth 14 through an adhesive, and the carbon fiber cloth 14 is longitudinally and/or transversely arranged and is adhered to the top surface and the bottom surface of the floor slab 2 at intervals in multiple rows.

The connecting part comprises angle steel 9 and a steel backing plate 10, the angle steel 9 is provided with two bottom corners which are respectively arranged on the beam 1, the steel backing plate 10 is arranged on the top of the two side surfaces of the beam 1, and the U-shaped steel plate hoop 3 wraps the angle steel 9 and the steel backing plate 10, is bonded by an adhesive and is fixed by an anchor bolt; the length of the angle steel 9 is equal to that of the beam 1; the top of steel backing plate 10 and the laminating of 2 bottoms of floor, the bottom of steel backing plate 10 and the bottom parallel and level of first screw rod 7, the width of steel backing plate 10 equals with the width of U-shaped steel sheet hoop 3, and the thickness of steel backing plate 10 equals and is 5 ~ 10mm with the thickness of angle steel 9.

The connecting part comprises a first steel plate pressing strip 11, the first steel plate pressing strip 11 is arranged at the bottom of the beam 1, and the U-shaped steel plate hoop 3 wraps the first steel plate pressing strip 11, is bonded by an adhesive and is fixed by an anchor bolt; the connecting part further comprises a second steel plate pressing strip 12, the second steel plate pressing strip 12 is bonded on the tops of two side faces of the beam 1 through an adhesive, the U-shaped steel plate hoop 3 wraps the first steel plate pressing strip 11, and the second steel plate pressing strip 12 is bonded on the U-shaped steel plate hoop 3 and fixed through an anchor bolt; the thickness of the first steel plate pressing strip 11 is 5-10 mm, and the thickness of the second steel plate pressing strip 12 is 5-10 mm.

The utility model discloses reinforced structure's construction steps and theory of operation as follows:

The beam plate reinforcing construction method of the existing building comprises the following steps:

in the first embodiment, as shown in fig. 1 to 4, an original concrete beam slab structure includes a beam 1 having a width of 250 × 500mm and a floor 2 having a thickness of 100mm provided on the top of the beam 1;

(a) Unloading and positioning paying-off: in order to reduce the stress and strain hysteresis phenomena of the reinforced steel plate, the original reinforced concrete beam plate structure is unloaded during the curing period of the adhered steel plate and the adhesive; when positioning and setting out, firstly, familiarizing with a reinforcement construction drawing, defining a reinforcement range and a reinforcement part, snapping a line on the surface of an original structure, marking a steel plate installation position line, marking punching position points of a through hole and an embedded anchor bolt hole, and marking the punching position points by combining the drawing requirements after detecting the positions of the original structural steel bars by using a steel bar detector when marking the punching position points;

(b) Original structure basic layer processing: firstly, removing a surface layer of an original structure, dipping a bonding surface of the original structure in a high-efficiency detergent by using a hard brush, removing oil stain on the surface, washing with clear water, polishing the bonding surface, removing a laitance and a carbonized layer with the thickness of 1-3 mm until a new structure surface is completely exposed, and blowing off dust by using an oil-free air compressor; finally, soaking absorbent cotton in acetone to wipe the surface for 2-3 times, and repairing and leveling the adhesive surface by using high-strength resin mortar if cracks or parts with serious unevenness exist on the adhesive surface after wiping treatment;

(c) preparing a reinforcing material, namely cutting a steel plate by using a cutting machine, manufacturing a first steel plate pressing strip 11 and a second steel plate pressing strip 12 which are equal in length and width to a beam 1, are 10mm in thickness, are manufactured according to a construction drawing, screw holes with the diameter of 8mm are punched on the first steel plate pressing strip 11, are 125mm in distance, are punched on the second steel plate pressing strip 12, are 8mm in diameter, are punched on the second steel plate pressing strip 12, are 250mm in distance, are punched on the screw holes, are 8mm in diameter, are manufactured, manufacturing a first strip-shaped plate element 4 and a fourth strip-shaped plate element 13 which are 50mm in width, are 15mm in thickness, are punched with screw holes with the distance of 250mm in distance, are manufactured, wherein the length of the first strip-shaped plate element 4 and the fourth strip-shaped plate element 13 is equal to the length of the beam 1, a plurality of M12 × 400, M8 × 400, M8 × 0100 and a plurality of M12 × 1180 anchor bolts are prepared, each first screw rod 7 is provided with a nut, a plurality of U-shaped steel plate hoops 3 with the width of 60mm and 6mm are prepared, two U-shaped steel hoops 3 with the length of 6mm in thickness, the inside two side walls of two U-shaped steel hoops 3, the length and the height of the two U-shaped steel hoops are prepared with the length of 60mm, the length of the width of 100mm, the bottom of;

Preparing carbon fiber cloth: cutting off the carbon fiber cloth 14 by using a steel ruler and a wallpaper cutter according to the size specified by the drawing, wherein the length of the carbon fiber cloth adhered to the bottom surface of the floor slab 2 is equal to the distance between two adjacent beams 1; the length of the carbon fiber cloth pasted on the top surface of the floor slab 2 is not more than 6 m.

Surface treatment of steel parts: if the steel piece is not embroidered or slightly rusted, sanding by using a sand blasting machine, a gauze machine or an angle grinder matched with a resin grinding wheel, and removing oil stains and sundries on the surface until the metal luster appears; the larger the grinding roughness is, the better the grinding roughness is, the grinding depth is controlled within 0.2mm so as not to influence the whole stress of the steel plate, and the grinding grains are perpendicular to the stress direction of the steel plate as much as possible.

(d) Punching and embedding a screw: adopting a percussion drill to punch anchor bolt pre-buried holes which are perpendicular to the bottom surface of the beam 1, have the diameter of 8mm and the depth of 400mm in the middle of the bottom surface of the beam 1, and punch anchor bolt pre-buried holes with the diameter of 8mm and the depth of 100mm in the middle of the positions, which are 100mm and 200mm away from the top of the beam 1, on the two side walls of the beam 1; punching first through holes which penetrate through the top and the bottom of the floor slab 2 and have the diameter of 12mm on the floor slab 2, wherein the first through holes are transversely arranged on two sides of the beam 1 in a row and have the distance of 6mm or 12mm from the beam 1, the distance between the first through holes on each row is 250mm, a first screw 7 is implanted into each first through hole, the upper end of each first screw 7 protrudes out of the top surface of the floor slab 2, the protruding length is 30mm, the lower end of each first screw 7 protrudes out of the bottom surface of the floor slab 2, the protruding length is 75mm, and the first screws 7 are sealed and fixed in the first through holes of the floor slab 2 by high-strength mortar;

(e) Adhesive preparation: preparing an adhesive by a clean container and a weighing device according to the following proportion, wherein the adhesive is used after being tested and verified to be qualified, and comprises resin and a curing agent, and the resin comprises the following components in percentage by weight: the curing agent is 100: 40-100, and the optimal bonding effect can be achieved by selecting a proper proportion according to different environments and medium conditions.

In the common adhesive, the resin adopts E-44 epoxy resin, the curing agent adopts 650 low molecular weight polyamide, and the weight ratio of the E-44 epoxy resin: 650 low molecular weight polyamide ═ 100: 80;

The resin can also adopt E-44 epoxy resin, the curing agent adopts 651 low molecular polyamide, and the weight ratio of the E-44 epoxy resin: 651, low-molecular polyamide ═ 100: 50;

Manual stirring or mechanical stirring is used, when mechanical stirring is adopted, the stirrer consists of an electric hammer and stirring teeth, the stirring teeth are made by welding cross phi 14 steel bars at the end part of an electric hammer drill bit, stirring is carried out along the same direction during stirring, and air is prevented from being mixed to form bubbles; the adhesive is prepared in a mode of being prepared as before, being prepared in a small amount and being prepared for multiple times, and is used up within 20 minutes after being prepared so as to prevent gelation;

The service life of the adhesive is about 33 minutes at 25 ℃/0.4MPa, the service life is shortened by the increase of pressure and temperature, and the adhesive is protected from sun exposure for prolonging the service life;

(f) Fixing and installing floor reinforcing materials: pre-placing a first strip-shaped plate 4 according to the installation position line of the fixing assembly in the step (a), respectively coating 2-5 mm of adhesive on the adhesive surface of the top of the floor slab 2 and the adhesive surface of the first strip-shaped plate 4, then adhering, correspondingly penetrating the upper end of a first screw 7 through a screw hole in the first strip-shaped plate 4 and installing a nut, knocking the first strip-shaped plate 4 by a hand hammer after adhering in place to promote uniform and full distribution of the adhesive, and pre-pressing the strip-shaped steel plate by screwing the nut to extrude redundant adhesive from the edge of the steel plate; similarly, 2-5 mm of adhesive is respectively coated on the adhesive surface at the bottom of the floor slab 2 and the adhesive surface of the fourth strip-shaped plate element 13 for adhesion, the lower end of the first screw 7 correspondingly penetrates through a screw hole in the fourth strip-shaped plate element 13 and is fixed by a nut, and the fourth strip-shaped plate element 13 and the first strip-shaped plate element 4 are opposite and parallel;

(g) fixing and mounting a beam reinforcing material, wherein a connecting part comprises a first steel plate pressing strip 11, 2-5 mm of adhesive is coated on an adhesive surface of the first steel plate pressing strip 11, an adhesive part of the bottom surface and two side surfaces of a beam 1 and an adhesive surface of a 250 × 485 mmU-shaped steel plate hoop 3, the first steel plate pressing strip 11 is adhered to the middle part of the bottom surface of the beam 1, an M8 × 400 anchor bolt penetrates through a screw hole on the first steel plate pressing strip 11 and is installed in an 8 × 400mm anchor bolt pre-buried hole at the bottom of the beam 1 for fixing, in the process, an anchor bolt pre-buried hole on the beam 1 and a screw hole on the first steel plate pressing strip 11 at the installation position of the U-shaped steel plate hoop 3 are temporarily installed in an instable manner, then the U-shaped steel plate hoop 3 is tightly hooped on the beam 1 and the first steel plate pressing strip 11, the M8 × 400 sequentially penetrates through the screw hole at the bottom of the U-shaped steel plate hoop 3, the screw hole on the first steel plate pressing strip 11 and is installed in the 8 × 400mm pre-buried hole at the bottom of the beam 1, two side walls of the 8 mm anchor bolt pre-buried hole on the bottom of the beam 1, the M8 × 100mm steel plate hoop 3 passes through the screw bolt hole on the U-shaped steel plate hoop 3 and is welded to be welded to the two side walls of the first steel plate hoop 3, the anchor bolt, the two side walls of the anchor;

(h) Bonding carbon fiber cloth on the floor slab: the carbon fiber cloth 14 is longitudinally arranged and is provided with a plurality of rows at intervals and is adhered to the top surface and the bottom surface of the floor slab 2; preparing base glue, uniformly brushing a layer of base glue on the part, needing to be bonded with the carbon fiber cloth for reinforcement, of the floor 2 by using a rolling brush, after the base glue is cured, checking the surface, and polishing the part with the bulge by using abrasive paper; preparing an adhesive for sticking the carbon fiber cloth, coating the adhesive under the carbon fiber cloth 14 by using a roller brush, wherein the lower coating amount standard is 500-600 g/square meter, uniformly coating, sticking the carbon fiber cloth 14 on a floor slab 2, when sticking, scraping the carbon fiber cloth by using a roller for several times to overflow the internal air, confirming that the carbon fiber cloth 14 is stuck on the floor slab 2, and then scraping the carbon fiber cloth 14 by using the roller for 4-5 times along the fiber direction to fully infiltrate the adhesive into the fibers; after 1420-90 minutes of adhering the carbon fiber cloth, coating an adhesive on the surface of the carbon fiber cloth 14 by using a roller brush, wherein the coating standard is 300-400 g/square meter, and the adhesive is forcibly scraped for 2-3 times along the fiber direction by using a roller during coating, so that the inside of the fiber is supplemented with infiltration resin, but the grid of the lining glass cannot be removed; performing hollowing treatment after curing 3-4 hours after coating;

(i) Curing and curing: checking whether the reinforced steel member has a gummosis phenomenon; at normal temperature, the adhesive can be stressed and used after being cured for 2-3 days, and if the curing temperature is low, an infrared lamp heating measure or a low-temperature curing modified product is adopted; after the carbon fiber cloth 14 is pasted, natural curing is needed to achieve solidification, natural curing time is needed for the veneering to achieve the designed strength, and one week is needed when the average temperature is between 10 ℃ and 20 ℃;

(j) Surface protection: marking the steel member which is stuck in place, reminding other personnel to prevent disturbance to the stuck steel within the curing time of the structural adhesive, after the structural adhesive is completely cured, firstly carrying out rust removal treatment on the steel plate, after the rust removal is finished, carrying out anticorrosion treatment on the surface of the steel plate according to the design requirement, and then spraying fireproof coating for surface fireproof treatment; the surface of the cured carbon fiber is protected by coating acrylic polyurethane, so that the ultraviolet aging resistance is enhanced;

(k) And (4) checking: observing the color and the hardening degree of the glue solution, and knocking a steel plate by a small hammer to detect the effective bonding area of the steel plate; the effective bonding area of the anchoring area should not be less than 90%, and the effective bonding area of the non-anchoring area should not be less than 80%; the effective sticking area requirement of the carbon fiber cloth 14 is more than or equal to 98 percent.

Through the arrangement, the integral reinforcing structure forms a frame structure wrapping the original beam-slab structure, the integral reinforcing structure and the original beam-slab form a composite structure stress mode, the adhesion degree between the adhesive and the reinforcing part as well as between the original beam structure is effectively improved by a bonding anchoring and reinforcing mode, the stress state of the original structure is improved, the bending resistance and the shearing resistance of the beam are improved, the generation and the development of the crack of the original structure can be restricted, and the bearing capacity and the durability of a building are improved; the carbon fiber cloth is adhered and fixed on the floor slab through the adhesive, and the carbon fiber cloth is longitudinally arranged and adhered on the top surface and the bottom surface of the floor slab at intervals, so that the compression bearing capacity of the floor slab is improved, the ductility of the structure is enhanced, and the anti-seismic performance and the anti-cracking capacity of the structure are improved; meanwhile, the reinforced structure is small in size increase, simple in construction process and short in construction period for the original beam slab structure, and is more energy-saving and environment-friendly compared with a newly-built reinforced concrete structure.

in the second embodiment, as shown in fig. 1 to 2, in the first embodiment, in the step (g), the connecting member for reinforcing the beam further includes a second steel plate pressing strip 12, the second steel plate pressing strip 12 is attached to two side walls of the beam 1 and covers a part of the side wall of the U-shaped steel plate hoop 3, the top of the second steel plate pressing strip 12 is 710mm away from the first screw, and the M8 × 100 anchor bolt is fixed in the embedded anchor bolt hole of 8 × 100mm on the beam 1 through the screw hole on the second steel plate pressing strip 12.

Through the arrangement, the first steel plate pressing strip which is equal to the beam in length is fixedly arranged at the bottom of the beam through adhesive bonding, the U-shaped steel plate hoop is fixed on the beam through the adhesive and the anchor bolt, the stress state of the original building structure is obviously improved, the bending resistance, the shearing resistance and the bearing capacity of the beam-plate structure are improved, on the basis that the connecting part is provided with the first steel plate pressing strip, the second steel plate pressing strips which are 5-10 mm in thickness are bonded at the tops of the two side faces of the beam through the adhesive and then are wrapped and fixed by the U-shaped steel plate hoop, the stress state of the original building structure is obviously improved, and the bending resistance, the shearing resistance and the bearing capacity of the beam-plate structure.

in the third embodiment, as shown in fig. 5 to 7, on the basis of the first embodiment, in step (g), angle steel 9 and a steel backing plate 10 can be used as a connecting part for beam reinforcement instead of a first steel plate bead 11, the connecting part comprises angle steel 9 and a steel backing plate 10, 2 to 5mm of adhesive is coated on the bonding surface of the steel plate hoops of angle steel 9, steel backing plate 10 and 262 × 485 type, the angle steel 9 and the steel backing plate 10 are bonded on the surface of a beam 1, the angle steel 9 is bonded on two bottom corners of the beam 1, the side wall of the angle steel 9 with a screw hole is bonded with the side wall of the beam 1, the screw hole and the embedded anchor hole of 8 × 100mm 200mm away from the top of the beam 1 on the beam 1 are in one-to-one correspondence, the top of the steel backing plate 10 is bonded with the bottom of a fourth plate element 13, a U-shaped steel plate hoop 3 is fastened to the steel backing plate 9 and the steel backing plate 10, a M8 × 400 anchor bolt penetrates through the two side walls of the bottom of the U-shaped steel plate hoop 3 and is mounted in the embedded anchor hole of the beam 1, the anchor bolt of the beam 1, the anchor bolt is welded with a distance d 1, the screw hole of the steel plate 3 mm, the screw hole and the anchor bolt of the anchor bolt, the anchor bolt is welded with a length of 100mm, the screw hole of 100mm, the screw bolt welded on the anchor bolt 1, the anchor bolt welded on the anchor bolt, the anchor bolt of the anchor bolt.

In the fourth embodiment, as shown in fig. 2, in addition to the embodiment 1, the carbon fiber cloth 14 is added to reinforce the floor slab, and the carbon fiber cloth 14 is transversely bonded to the floor slab, so that the carbon fiber cloth 14 is longitudinally and transversely bonded in a lattice shape, the carbon fiber cloth 14 transversely bonded is long, and an anchor bolt can be arranged in the middle for anchoring.

In the fifth embodiment, based on the first embodiment, in the step (h), when the carbon fiber cloth 14 needs to be connected, the joint overlapping length is not less than 100mm, the adhesive is coated on the overlapping portion more, when two or more layers of carbon fiber cloth need to be laid, the carbon fiber cloth needs to be laid within 4 hours to 3 days after the empty drum is filled, and when the carbon fiber cloth needs to be connected in multiple layers, the overlapping positions of the layers need to be staggered.

sixth embodiment, as shown in fig. 8 to 10, in the first embodiment, in the step (c), the reinforcing material for the beam slab 2 further includes steel members for reinforcing the floor slab 2, second strip-shaped plate members 5 and third strip-shaped plate members 6 are manufactured, the second strip-shaped plate members 5 and the third strip-shaped plate members 6 are correspondingly provided, the second strip-shaped plate members have widths of 50mm and thicknesses of 15mm, screw holes with a distance of 250mm are respectively formed in the second strip-shaped plate members, the length of each third strip-shaped plate member 6 is equal to the distance between two adjacent beams 1, a plurality of M12 × 180 second screws 8 are prepared, and each second screw 8 is provided with two.

In the step (d), second through holes which penetrate through the top and the bottom of the floor slab 2 and have the diameter of 12mm and second through holes are punched in the floor slab 2, the second through holes are longitudinally arranged and are punched in a plurality of rows at intervals of 250mm, the distance between every two second through holes in the same row is 250mm, second screw rods 8 are implanted into the second through holes, the upper ends of the second screw rods 8 protrude out of the top surface of the floor slab 2, the protruding length is 30mm, the lower ends of the second screw rods 8 protrude out of the bottom surface of the floor slab 2, the protruding length is 30mm, and the second screw rods 8 are sealed and fixed in the second through holes.

In the step (f), a second strip-shaped plate 5 is arranged above the first strip-shaped plate 4, 2-5 mm of adhesive is respectively coated on the adhesive surface of the top of the floor slab 2, the adhesive surface of the first strip-shaped plate 4 and the adhesive surface of the second strip-shaped plate 5 for adhesion, after the adhesive surfaces are adhered in place, a hand hammer can be used for knocking the second strip-shaped plate 5 to promote the uniform distribution and the full distribution of the adhesive, when the second strip-shaped plate 5 is arranged, the upper end of a second screw 8 correspondingly penetrates through a screw hole in the second strip-shaped plate 5 and is provided with a nut, and the second strip-shaped plate 5 is vertical to the first strip-shaped plate 4; the third strip plate 6 of installation in 2 bottoms of floor of the same reason, the lower part of second screw rod 8 corresponds when installation third strip plate 6 passes the screw and the installation nut on the third strip plate 6, and third strip plate 6 and second strip plate 5 are just to being parallel.

Through the floor slab pasting steel plate structure arrangement of the sixth embodiment, the floor slab pasting steel plate structure can be used for replacing the floor slab pasting carbon fiber cloth reinforcing structure of the step (h) in the first embodiment to reinforce the floor slab 2.

Seventh embodiment, the floor slab pasting steel plate structure of sixth embodiment may be used to combine the floor slab pasting carbon fiber cloth reinforcing structure of step (h) in the first embodiment to reinforce the floor slab 2, and specifically, the second strip-shaped plate 5 and the third strip-shaped plate 6 may be longitudinally arranged, and the carbon fiber cloth 14 may be transversely arranged.

In an eighth embodiment, on the basis of the first, sixth or seventh embodiment, a steel plate bead limiting strip can be arranged on the upper edge of the inner side of the bottom edge of the U-shaped steel plate hoop 3, the steel plate bead limiting strip is welded on two side edges of the U-shaped steel plate hoop 3, a steel plate bead limiting hole is formed with the two side edges and the bottom edge of the U-shaped steel plate hoop 3, and the width of the steel plate bead limiting hole is matched with the thickness of the first steel plate bead 11; during the installation, first steel sheet layering 11 passes the spacing hole of steel sheet layering on every U-shaped steel sheet hoop 3, and the whole cluster is mentioned and is installed 1 on the roof beam, and the rethread viscose is fixed on roof beam 1, adopts this structure, and reducible punching on roof beam 1 reduces 1 wholeness's to roof beam's destruction, reduces the use amount of crab-bolt, practices thrift the cost.

In the ninth embodiment, as shown in fig. 11 to 12, on the basis of the first embodiment, the sixth embodiment or the seventh embodiment, the bottom end of the U-shaped steel plate hoop 3 is further provided with an i-beam 15 tightly attached to the U-shaped steel plate hoop 3, i-beam upright posts 16 are arranged at the lower sides of the two ends of the i-beam to form a gantry-shaped support frame, and the bottom end of the U-shaped steel plate hoop 3 and the i-beam 15 are fixed through bolts or welding; the length of the I-steel 15 is the same as that of the beam, the I-steel upright column 16 is tightly hooped on the column through steel hoops, the bottom end of the I-steel upright column is fixed with a floor slab through a high-strength bolt, the top end of the I-steel upright column tightly abuts against the lower part of the two ends of the I-steel 15, and the I-steel upright column is fixed with the I-steel 15 through welding and bolts; the I-shaped steel 15 is high in rigidity and impact-resistant, and has the advantages of bearing force with the beam, improving the bearing capacity of the beam, reducing the using amount of U-shaped steel plate hoops 3, first screw rods 7 and anchor bolts, reducing punching on the beam and a floor slab, reducing damage to the beam and the floor slab, properly arranging a plurality of U-shaped steel plate hoops 3 in the middle of the beam according to the length of the beam, and generally arranging 4-5U-shaped steel plate hoops 3 to complete reinforcement of the beam.

The working principle is as follows: through the construction scheme, the reinforcing part and the original beam-slab structure are fully bonded, the frame structure wrapping the original beam-slab structure is formed, the integral reinforcing structure and the original beam-slab structure form a composite structure stress mode, the bonding degree between the adhesive and the reinforcing part and between the original beam-slab structure is effectively improved in a fixing mode, the stress state of the original structure is improved, the bending resistance and the shearing resistance of the beam-slab are improved, the generation and the development of the original structure crack can be restricted, and the bearing capacity and the durability of a building are improved.

Through research and statistics, the shear strength of the structural adhesive needs to meet the following requirements:

Performance of	Index requirement
		Tensile strength	≥25Mpa
Compressive strength	≥65Mpa
		Elongation percentage	≥1.3％

The utility model discloses a material as follows:

1. The reinforcing component steel member adopts Q345B steel;

2. The adhesive is a modified epoxy resin adhesive; the adhesive preparation scheme is as follows: the weight ratio of resin: curing agent 100: 80;

The physical properties of the adhesive after curing for 7 days were as follows:

Performance of	Index (I)
		Tensile strength	46Mpa
Compressive strength	≥76Mpa
		Elongation percentage	1.9％

The performance indexes all meet the requirements.

In conclusion, the utility model has the advantages of fast construction speed, short completion period, saving construction period and labor force; the reinforcing part adopts a double fixing mode to obviously improve the standing degree of the adhesive, the whole reinforcing structure is of a frame structure to wrap the original beam-slab structure, the stress state of the original beam-slab structure is obviously improved, the bending resistance and the shearing resistance of the beam-slab are improved, the generation and the development of cracks of the original beam-slab structure can be restricted, and the bearing capacity and the durability of a building are improved; the reinforcing structure has small size increase on the original beam slab structure, the used reinforcing material has low price, the waste of reinforced concrete and the environmental pollution caused by disassembling the old building are reduced, and the economic benefit is good; additionally, the utility model discloses a better method is provided in the construction of steel sheet (shaped steel) + concrete beam, the compound atress integrated configuration of board, has advantages such as simple, quick, effective, safety, environmental protection, has good promotion effect to promoting the development that glues the steel reinforcement existing concrete building structure, provides good construction method to protection history landmark building, has higher social.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art are all within the scope of the present invention as defined by the claims.

Claims

1. Beam slab reinforced structure of existing building, include roof beam (1) and establish floor (2) at roof beam (1) top, its characterized in that: the beam (1) is fixedly provided with a connecting part and a plurality of U-shaped steel plate hoops (3) which are arranged at intervals in an adhesive bonding way, and the U-shaped steel plate hoops (3) are tightly hooped at the outer sides of the connecting part and the beam (1) and are fixed through anchor bolts; the floor (2) is provided with a plurality of first through holes vertically penetrating through the floor (2), the first through holes are transversely arranged on two sides of the beam (1) in a line and have a certain distance with the side surface of the beam (1), a first screw (7) is implanted into the first through holes and fixes the first screw (7) and the floor (2), the upper end of the first screw (7) protrudes out of the top surface of the floor (2), and the lower end of the first screw (7) protrudes out of the bottom surface of the floor (2); a first strip-shaped plate (4) with a screw hole is fixedly arranged on the top surface of the floor slab (2) in an adhesion manner through an adhesive, a fourth strip-shaped plate (13) with a screw hole is fixedly arranged on the bottom surface of the floor slab (2) in an adhesion manner through an adhesive, and the first strip-shaped plate (4) is opposite to and parallel to the fourth strip-shaped plate (13); the lower end of the first screw rod (7) penetrates through a screw hole in the fourth strip-shaped plate (13) and is fixedly welded with the upper end of the U-shaped steel plate hoop (3), and the upper end of the first screw rod (7) penetrates through the screw hole in the first strip-shaped plate (4) and is provided with a nut to fix the first strip-shaped plate (4) on the top surface of the floor slab (2).

2. The beam panel reinforcement structure of an existing building according to claim 1, wherein: the floor (2) is also provided with a plurality of second through holes vertically penetrating through the floor (2), the second through holes are longitudinally arranged and are provided with a plurality of rows at intervals, second screw rods (8) are implanted into the second through holes and fix the second screw rods (8) and the floor (2), the upper ends of the second screw rods (8) protrude out of the top surface of the floor (2), and the lower ends of the second screw rods (8) protrude out of the bottom surface of the floor (2); the floor is characterized in that a second strip-shaped plate (5) with a screw hole is fixedly arranged on the top surface of the floor (2) through an adhesive, a third strip-shaped plate (6) with a screw hole is fixedly arranged on the bottom surface of the floor (2) through an adhesive, the lower end of a second screw rod (8) penetrates through the screw hole in the third strip-shaped plate (6) and is installed with a nut to fix the third strip-shaped plate (6) on the bottom surface of the floor (2), and the upper end of the second screw rod (8) penetrates through the screw hole in the second strip-shaped plate (5) and is installed with a nut to fix the second strip-shaped plate (5) on the top.

3. The beam panel reinforcement structure of an existing building according to claim 1 or 2, wherein: the floor (2) is fixedly bonded with carbon fiber cloth (14) through an adhesive, and the carbon fiber cloth (14) is longitudinally and/or transversely arranged and is arranged at intervals in a plurality of rows and is adhered to the top surface and the bottom surface of the floor (2).

4. The beam panel reinforcement structure of an existing building according to claim 1, wherein: the connecting part comprises angle steel (9) and a steel base plate (10), the angle steel (9) is provided with two bottom corners which are respectively arranged on the beam (1), the steel base plate (10) is arranged on the top of two side faces of the beam (1), and the U-shaped steel plate hoop (3) wraps the angle steel (9) and the steel base plate (10) and is bonded by an adhesive and fixed by an anchor bolt.

5. The beam panel reinforcement structure of an existing building according to claim 4, wherein: the length of the angle steel (9) is equal to that of the beam (1); the top and floor (2) bottom laminating of steel backing plate (10), the bottom of steel backing plate (10) and the bottom parallel and level of first screw rod (7), the width of steel backing plate (10) and the width of U-shaped steel sheet hoop (3) equal, the thickness of steel backing plate (10) and angle steel (9) equal and be 5 ~ 10 mm.

6. The beam panel reinforcement structure of an existing building according to claim 1, wherein: the connecting part comprises a first steel plate pressing strip (11), the first steel plate pressing strip (11) is arranged at the bottom of the beam (1), and the U-shaped steel plate hoop (3) wraps the first steel plate pressing strip (11), is bonded by an adhesive and is fixed by an anchor bolt.

7. The beam panel reinforcement structure of an existing building according to claim 6, wherein: the connecting part further comprises a second steel plate pressing strip (12), the second steel plate pressing strip (12) is bonded to the tops of two side faces of the beam (1) through an adhesive, the first steel plate pressing strip (11) is wrapped by the U-shaped steel plate hoop (3), and the second steel plate pressing strip (12) is bonded to the U-shaped steel plate hoop (3) and fixed through an anchor bolt.

8. The beam panel reinforcement structure of an existing building according to claim 7, wherein: the thickness of the first steel plate pressing strip (11) is 5-10 mm, and the thickness of the second steel plate pressing strip (12) is 5-10 mm.

9. The beam panel reinforcement structure of an existing building according to claim 1, 4, 5, 6, or 7, wherein: the thickness of U-shaped steel plate hoop (3) is 5 ~ 10mm, and two liang of U-shaped steel plate hoops (3) interval 200 ~ 300mm and mutual parallel arrangement.