Inorganic glue, H-shaped steel beam reinforced concrete floor slab and construction method

Abstract

The invention provides an inorganic glue and H-shaped steel beam reinforced concrete floor slab and a construction method, relates to the field of existing building reinforcement, and aims to solve the problem of limited bearing capacity improvement caused by reinforcement of a single component of the floor slab at present. The bearing capacity limitation of traditional local reinforcement is broken through, excessive dependence on original floor performance is avoided, reinforced concrete floors, H-shaped steel beams, peripheral beams, columns, walls and other stress components work cooperatively, and a new stable force transmission structure system is formed. The anchoring area in the through hole rigidly connects the H-shaped steel beam with an original floor steel bar node and a concrete base body through a connecting piece, so that effective transmission of loads is ensured; the through hole form with the wide top and the narrow bottom enhances the occlusion force between the anchoring material and the floor, and improves the connection reliability; the carbon fiber cloth above the through holes restrains the floor concrete in the trepanning area, and local strength loss possibly caused by trepanning is made up.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of existing building reinforcement, in particular to an inorganic adhesive and a method for reinforcing a concrete floor with H-shaped steel beams. BACKGROUND

[0002] Currently, the aging concrete slabs in existing buildings generally face the problem of reduced safety or failure to meet current and future use requirements due to factors such as material degradation, approaching or exceeding the design service life, etc. Compared with demolishing the existing floor and rebuilding a new floor, taking reinforcement measures can enhance the bearing capacity and safety of the existing floor, minimize resource waste, and save time.

[0003] Currently, methods suitable for existing reinforced concrete floors mainly include: section enlargement reinforcement, prestressed reinforcement, and steel plate / fiber composite reinforcement. However, these methods only enhance the local performance of the floor single component, and the bearing capacity improvement is limited, and it is difficult to provide sufficient redundancy for subsequent load increase, largely relying on the remaining performance of the original concrete floor. If the base concrete is severely damaged and has insufficient strength, the reinforcement effect will be greatly reduced. Especially in the case of a significant increase in external load, major changes in building function, or serious defects in the original structure, existing conventional reinforcement methods often cannot effectively meet the reinforcement design requirements.

[0004] In addition, when using prestressed tendons, steel plates, or fiber composites as external reinforcing elements, once they fail, their reinforcement effect is almost completely lost, and the long-term service performance and reliability are severely insufficient. SUMMARY

[0005] The purpose of the present application is to overcome the defects of the prior art and provide an inorganic adhesive and a method for reinforcing a concrete floor with H-shaped steel beams. The H-shaped steel beam is attached to the bottom surface of the concrete floor and serves as the main load-bearing component to bear the additional load. This method breaks through the bearing capacity limit of traditional local reinforcement and no longer relies excessively on the performance of the original floor. The reinforced concrete floor, H-shaped steel beam, and surrounding beams, columns, and walls work together to form a new stable load transfer structure system. The anchoring area in the through hole connects the H-shaped steel beam with the original floor steel reinforcement node and the concrete base through a connecting piece, forming a common load-bearing system and preventing relative sliding between the H-shaped steel beam and the floor, ensuring effective load transfer. The through hole shape with a wide upper part and a narrow lower part enhances the engagement force between the anchoring material and the floor, improving the connection reliability.

[0006] The first purpose of the present application is to provide an inorganic adhesive and a method for reinforcing a concrete floor with H-shaped steel beams, which adopts the following scheme: The application relates to a concrete floor slab and an H-shaped steel beam, the H-shaped steel beam is attached to the bottom surface of the concrete floor slab, a plurality of through holes are formed in the concrete floor slab along the direction of the H-shaped steel beam, the through holes expose the steel bar nodes of the concrete floor slab, the top opening area of the through hole is larger than the bottom opening area, the top surface of the H-shaped steel beam is connected with a connecting piece inserted into the through hole, the through hole is filled with inorganic glue to form an anchoring area for connecting the steel bar nodes, the connecting piece and the concrete floor slab, and a carbon fiber cloth is attached to the top of the through hole to cover all the through holes.

[0007] Further, the through hole is a gradually-changing structure with the cross-sectional area gradually decreasing from the top to the bottom, and the anchoring area formed by filling the anchoring material is in the shape of a circular truncated cone or a ladder-shaped truncated cone.

[0008] Further, the connecting piece is connected with the steel bar node in the through hole.

[0009] Further, the top of the flange plate of the H-shaped steel beam is attached to the concrete floor slab, and a protective layer is wrapped around the H-shaped steel beam except the top surface of the upper flange plate.

[0010] Further, the carbon fiber cloth is wrapped with a protective coating, and the inorganic glue filled in the through hole, the protective layer and the protective coating are all made of magnesium phosphate inorganic glue.

[0011] Further, the H-shaped steel beam extends to the pre-set hole of a force-bearing member and is anchored by filling inorganic glue, and the force-bearing member is connected with and bears the H-shaped steel beam.

[0012] The second object of the application is to provide a construction method for reinforcing a concrete floor slab by using inorganic glue and an H-shaped steel beam, which comprises the following steps: A plurality of through holes are formed in the concrete floor slab by perforating the concrete floor slab, and the steel bar nodes of the concrete floor slab are located in the through holes; A connecting piece is arranged on the top surface of the H-shaped steel beam, the H-shaped steel beam is adjusted so that the top surface of the H-shaped steel beam is attached to the bottom surface of the concrete floor slab, the connecting piece is inserted into the through hole, and temporary supports are arranged for the H-shaped steel beam; An anchoring material is filled into the through hole to connect the steel bar nodes, the connecting piece and the concrete floor slab, and an anchoring area with a large top and a small bottom is formed; A carbon fiber cloth is attached to the top surface of the concrete floor slab in the through hole distribution area, and the temporary supports are removed after curing.

[0013] Further, the H-shaped steel beam is coated with inorganic glue to form a protective layer on the top surface of the upper flange plate before being connected with the concrete floor slab, the carbon fiber cloth is attached to the top surface of the concrete floor slab by the inorganic glue and is connected with the anchoring area.

[0014] Further, the top surface of the H-shaped steel beam is attached to the bottom surface of the concrete floor slab by the inorganic glue, and the connecting piece is connected with the steel bar nodes in the through hole.

[0015] Further, a hole is pre-formed on the force bearing component under the concrete floor, and the H-shaped steel beam is inserted into the hole and filled with inorganic glue.

[0016] Compared with the prior art, the application has the advantages and positive effects that: In view of the problem that the bearing capacity is limited when the single component of the floor is reinforced, the H-shaped steel beam is attached to the bottom surface of the concrete floor and serves as a main force bearing component to bear the added load, thereby breaking through the bearing capacity limit of the traditional local reinforcement and no longer relying excessively on the performance of the original floor, so that the reinforced concrete floor, the H-shaped steel beam and the surrounding beams, columns and walls and other force bearing components work cooperatively to form a new stable load transfer structure system; the anchoring area in the through hole rigidly connects the H-shaped steel beam and the original floor steel bar joint and the concrete base body through the connecting piece, so that the two form a common force bearing system and the relative slip between the H-shaped steel beam and the floor is avoided to ensure effective load transfer; the through hole with the upper part wide and the lower part narrow enhances the engagement force between the anchoring material and the floor and improves the connection reliability; the carbon fiber cloth above the through hole restrains the floor concrete in the opening area, makes up for the possible local strength loss caused by the opening and forms an upper and lower cooperative reinforcement with the H-shaped steel beam, so that even if a local reinforcement fails, other structures can still play a part in bearing to improve the safety during long-term service.

[0017] The integrated force bearing system formed by the H-shaped steel beam and the original floor significantly improves the overall stiffness and stability of the reinforced structure; the multiple connection and restraint mechanisms reduce the risk caused by the failure of a single component and enhance the reliability during long-term service; at the same time, compared with the reconstruction, the scheme maximizes the retention of the original floor structure, reduces resource waste and has less impact on the normal use of the building during construction, and is economical and practical.

[0018] The inorganic glue and the H-shaped steel beam are used to reinforce the concrete floor, which actually adds a fulcrum to the floor and forms a composite structure with the concrete floor, changes the structure system, has a clear load transfer path, has a significant and reliable strengthening effect, can greatly improve the bearing capacity and stiffness of the floor and reduce the deflection, effectively inhibits the development of cracks, fully utilizes the advantages of high tensile strength, high ductility and high toughness of steel, has low requirements for the original concrete floor and is suitable for reinforcement scenarios such as a large increase in external load, a major change in building function and serious defects (such as large-area cracking of concrete and corrosion of steel bars) in the original floor.

[0019] The high-performance inorganic glue is used as the protective layer of the H-shaped steel beam, and the deficiency of the steel structure itself is made up. The inorganic glue has good fire resistance and corrosion resistance, can effectively protect the rear H-shaped steel, and improves the durability, corrosion resistance and high-temperature resistance of the H-shaped steel beam. The stability of the inorganic glue as an anchoring agent and an adhesive in extreme environments such as high temperature and corrosion is ensured; the inorganic glue is filled as an anchoring agent at the contact surface of the H-shaped steel beam and the concrete floor and the shear connector, which can effectively improve the bonding performance between the H-shaped steel beam and the concrete floor, effectively ensure the connection reliability of the H-shaped steel beam and the concrete floor under fire, and effectively maintain the bearing effect of the composite structure.

[0020] The whole strip-shaped carbon fiber cloth is pasted near the through hole of the concrete floor for reinforcement, which can effectively avoid the problem of insufficient bearing capacity and crack resistance of the concrete in the new negative bending moment area generated by the H-shaped steel beam reinforced floor, especially the floor often has no top reinforcement arrangement. The pasted carbon fiber cloth can effectively bear the tensile stress here, avoid the structure damage caused by the excessive negative bending moment near the new support, and effectively play the advantages of corrosion resistance and leakage resistance of the carbon fiber cloth itself. Meanwhile, the inorganic glue acts as a protective layer and adhesive for the carbon fiber cloth, which can effectively prolong the service life of the carbon fiber cloth reinforcement. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of this application form a part of this application and serve to further provide a further understanding of the application, the illustrative embodiments of the application and its description serve to explain the application without limiting the application in any manner.

[0022] Figure 1 The construction flowchart of the inorganic glue and the H-shaped steel beam reinforced concrete floor in one or more embodiments of the application; Figure 2 The reinforcement arrangement of the concrete floor in one or more embodiments of the application; Figure 3 The top view of the concrete floor after the through hole is opened in one or more embodiments of the application; Figure 4 The sectional view of the H-shaped steel beam coated with the inorganic glue protective coating in one or more embodiments of the application; Figure 5 The top view of the H-shaped steel beam after the shear connector is welded in one or more embodiments of the application; Figure 6 The front view of the H-shaped steel beam after the shear connector is welded in one or more embodiments of the application; Figure 7 The top view of the H-shaped steel beam and the concrete floor forming a composite structure in one or more embodiments of the application; Figure 8 The front view of the H-shaped steel beam and the concrete floor forming a composite structure in one or more embodiments of the application; Figure 9 a protective coating for the carbon fiber cloth to which the inorganic adhesive is applied in one or more embodiments of the present application; Figure 10 a top view of a combined structure of an H-shaped steel beam and a concrete floor to which the inorganic adhesive is injected and to which the carbon fiber cloth is attached in one or more embodiments of the present application; Figure 11 a front view of a combined structure of an H-shaped steel beam and a concrete floor to which the inorganic adhesive is injected and to which the carbon fiber cloth is attached in one or more embodiments of the present application; Figure 12 a flow chart of a method in which an H-shaped steel beam is extended into a pre-set opening in a load-bearing member in one or more embodiments of the present application; Figure 13 a front view of a combined structure of an H-shaped steel beam with support at an end portion and a concrete floor and a load-bearing wall in one or more embodiments of the present application; Figure 14 a side view of a combined structure of an H-shaped steel beam with support at an end portion and a concrete floor and a load-bearing wall in one or more embodiments of the present application.

[0023] In the drawings: 1, concrete floor; 2, through hole; 3, steel bar joint; 4, H-shaped steel beam; 5, inorganic adhesive; 6, connecting member; 7, H-shaped steel beam to which the inorganic adhesive is applied; 8, adhesive layer; 9, carbon fiber cloth; 10, protective coating; 11, opening; 12, load-bearing member. DETAILED DESCRIPTION

[0024] Embodiment 1 In one typical embodiment of the present application, as shown in FIG. 1, an inorganic adhesive and an H-shaped steel beam for reinforcing a concrete floor are provided. Figures 1-14

[0025] When the existing concrete floor 1 is reinforced, the conventional reinforcement method only locally enhances a single component of the floor, and the bearing capacity is limited to increase, which is difficult to meet the demand for a significant increase in load or a major change in building function, and the reinforcement effect is seriously dependent on the remaining performance of the original floor. When external reinforcing elements such as prestressed reinforcement and steel plates are used, the reinforcement effect is completely lost once failure occurs, and the long-term service reliability is insufficient. Based on this, the present embodiment provides an inorganic adhesive 5 and an H-shaped steel beam 4 for reinforcing a concrete floor 1. The H-shaped steel beam 4 is attached to the bottom surface of the concrete floor 1 and serves as a main load-bearing member 12 to bear the added load, thereby breaking through the bearing capacity limit of the traditional local reinforcement and no longer relying too much on the performance of the original floor. In addition, an opening 11 is provided and filled with anchoring material to establish a connection between the H-shaped steel beam 4 and the steel bar joint 3 of the concrete floor 1, thereby ensuring effective load transfer.

[0026] As shown in FIG. 2, an inorganic adhesive 5 and an H-shaped steel beam 4 for reinforcing a concrete floor 1 are provided. Figures 1-14 ​As shown, the inorganic glue 5 and the H-shaped steel beam 4 reinforced concrete floor 1 mainly includes a concrete floor 1, an H-shaped steel beam 4 and a carbon fiber cloth 9, the H-shaped steel beam 4 and the concrete floor 1 form an integrated connection, and a multiple reinforcement mechanism is established.

[0027] The H-shaped steel beam 4 is attached to the bottom surface of the concrete floor 1 and serves as a main force component 12 to bear the added load; the concrete floor 1 is provided with a plurality of through holes 2 along the direction of the H-shaped steel beam 4, the through holes 2 expose the original floor reinforcement node 3, and the top opening area is larger than the bottom, forming a wide-top-narrow-bottom shape; the connecting piece 6 on the top surface of the H-shaped steel beam 4 penetrates into the through hole 2, and the through hole 2 is filled with an anchoring material to form an anchoring area, which firmly connects the reinforcement node 3, the connecting piece 6 and the concrete floor 1; the carbon fiber cloth 9 is pasted on the top of the through hole 2 to cover all the through holes 2.

[0028] The core problem solving principle is to realize overall stress through multiple structure cooperation and multiple protection: the H-shaped steel beam 4 as a high-strength force main body can directly bear most of the added load, breaking through the bearing capacity limit of traditional local reinforcement, and no longer relying on the performance of the original floor; the anchoring area in the through hole 2 rigidly connects the H-shaped steel beam 4, the original floor reinforcement node 3 and the concrete matrix through the connecting piece 6, so that the two form a common stress system, avoiding relative slip between the H-shaped steel beam 4 and the floor, and ensuring effective load transfer; the wide-top-narrow-bottom shape of the through hole 2 enhances the engagement force between the anchoring material and the floor, improving the connection reliability; the carbon fiber cloth 9 above the through hole 2 restrains the floor concrete of the opening area, making up for the possible local strength loss caused by the opening, and forms a top-down cooperative reinforcement with the H-shaped steel beam 4, so that even if one of the reinforcement links fails, the other structures can still play a part in bearing, improving the safety of long-term service.

[0029] In this embodiment, the H-shaped steel beam 4 and the carbon fiber cloth 9 are used to reinforce the concrete floor 1, so that the bearing capacity of the reinforced concrete floor 1 is greatly improved, which can effectively cope with the scenarios of load increase, building function change and the like, and is no longer limited by the remaining performance of the original floor; the integrated stress system formed by the H-shaped steel beam 4 and the original concrete floor 1 significantly improves the overall stiffness and stability of the reinforced structure; the multiple connection and restraint mechanism reduces the risk of single component failure and enhances the reliability of long-term service; at the same time, compared with reconstruction, this scheme maximizes the preservation of the original floor structure, reduces resource waste, and has less impact on the normal use of the building during construction, and has both economy and practicality.

[0030] As shown in FIG. 1, the original floor 1 is reinforced by the H-shaped steel beam 4 and the carbon fiber cloth 9. Figure 3 , Figure 8As shown, the through hole 2 adopts a tapered structure with a gradually decreasing cross-sectional area from top to bottom, and forms a circular truncated cone or stepped truncated cone anchoring area after filling with anchoring material. This structure has significant advantages over straight holes, as it can enhance mechanical interlocking force. The shape of the wide top and narrow bottom allows the anchoring material to form a wedge-like bonding relationship with the concrete, significantly improving the uplift capacity. It can also disperse stress concentration, and the gradual transition avoids stress concentration points caused by right angles or sudden changes, reducing the risk of cracking, improving overall synergy, and the circular truncated cone anchoring area makes the force transmission between the connecting piece 6 and the concrete more uniform, enhancing the working capacity of the H-shaped steel beam 4 and the floor.

[0031] The connecting piece 6 actively connects with the steel bar node 3 inside the through hole 2, converting traditional passive anchoring to active connection. The connecting piece 6 is a shear anchoring connection structure that can be connected with the steel bar node 3 inside the through hole 2 through welding, or can be connected through fasteners, U-shaped bolt fasteners, binding pieces, etc., forming a force-closed loop. The H-shaped steel beam 4 is directly connected to the original floor steel reinforcement framework through the connecting piece 6, realizing direct load transfer and improving shear performance. The participation of the steel bar node 3 significantly improves the shear capacity of the through hole 2 area, avoiding local shear failure; the newly added H-shaped steel beam 4 forms an integral whole with the original structure, rather than a simple additional component.

[0032] The top of the H-shaped steel beam flange plate is directly pasted to the concrete floor 1, and the other surfaces are wrapped with a protective layer. The top surface of the flange plate is bonded to the bottom surface of the concrete floor 1 through an adhesive layer 8, ensuring effective shear force transmission. The protective layer provides corrosion and fire protection for the steel beam, prolonging its service life. Inorganic glue 5 is used as the protective layer material, which has good compatibility and durability with concrete. The inorganic glue 5 filled in the through hole, the adhesive layer 8, and the protective coating 10 all use magnesium phosphate inorganic glue 5.

[0033] The carbon fiber cloth 9 covers all the through holes 2 and wraps the protective coating 10, providing effective reinforcement to the weakened area of the opening, preventing cracking along the hole edge, and forming a ring-shaped constraint on the anchoring area to improve anchoring efficiency. The protective coating 10 provides wear-resistant and anti-aging protection for the carbon fiber cloth 9, ensuring long-term performance.

[0034] The H-shaped steel beam extends to the pre-set hole 11 of the load-bearing member 12 and is anchored with inorganic glue 5, providing a reliable support for the H-shaped steel beam 4 through the hole 11. The load of the newly added steel beam is effectively transferred to the main load-bearing member 12 of the original structure, enhancing the overall stability. End anchoring prevents lateral displacement or warping of the steel beam. The pre-set hole 11 cooperates with the inorganic glue 5 anchoring, simplifying the construction process and improving the connection reliability.

[0035] In this embodiment, the core scheme is strengthened from multiple dimensions, and the gradual through hole 2 optimizes the force transmission path; the active connection of the connecting piece 6 and the steel bar node 3 forms a truly integrated force system; the protective layer and the protective coating 10 ensure long-term durability; the end anchoring provides reliable support conditions for the entire reinforcement system. Each part cooperates with each other, so that the reinforcement effect is no longer dependent on the remaining performance of the original floor, but forms an independent and efficient force system.

[0036] In this embodiment, the reinforcement area of the concrete floor 1 needs to be determined according to the floor size and reinforcement condition, and is arranged along the short span direction of the floor, located in the middle of the floor. The axis of the reinforcement area needs to pass through the steel bar node 3 of the floor, the length of the reinforcement area is equal to the width of the floor, and the width of the reinforcement area is equal to the width of the H-shaped steel beam 4 used; the center of the through hole 2 opened in the concrete floor 1 needs to be on the axis of the reinforcement area, and the center of the through hole 2 is preferably the same as the center of the steel bar node 3 of the concrete floor 1. The spacing of the center of the through hole 2 is preferably 300mm~800mm, a hole is drilled at the determined position using a drill or an electric hammer, the steel bars at the hole are reserved, the shape of the through hole 2 is an inverted table type with a wide upper surface and a narrow lower surface, and a single set of shear connectors 6 can pass through the narrowest part. The upper surface width of the through hole 2 is preferably 100mm or more wider than the lower surface width.

[0037] The inorganic glue 5 in this embodiment adopts high-performance magnesium phosphate inorganic glue 5, and the raw materials include dead-burned magnesium oxide, potassium dihydrogen phosphate, disodium ethylenediaminetetraacetate, borax, silica powder, calcium chloride and water; the thickness of the protective coating 10 formed by the high-performance inorganic glue 5 is 8mm~30mm.

[0038] The connecting piece 6 adopts a bolted shear connector 6, which is uniformly arranged on the top surface of the upper flange of the H-shaped steel beam 4 in the span direction of the H-shaped steel beam 4. The spacing between the groups of shear connectors 6 is preferably 200mm~600mm, the number of bolts in each group of shear connectors 6 is not less than 4, and the spacing between the bolts in the group is 100mm~200mm; the bolt adopts a cylindrical head weld nail, the diameter is not less than 16mm, the height is not less than 80mm, and the difference between the height and the thickness of the floor is not more than 15mm.

[0039] The inorganic glue 5 is injected into the through hole 2 of the concrete floor 1 as an anchoring material, and the upper surface of the through hole 2 is flush with the upper surface of the concrete floor 1 after injection; the area where the carbon fiber cloth 9 is pasted is the glue injection area of the through hole 2 on the upper surface of the concrete floor 1, and the carbon fiber cloth 9 is in the form of a full-length strip, the axis of which coincides with the central axis of the through hole 2, and is placed along the short span direction. When placing, first apply a thin layer of high-performance inorganic glue 5 as an adhesive, then place the carbon fiber cloth 9, and then apply a thin layer of high-performance inorganic glue 5 as a protective layer, and the thickness of the thin layer is preferably 5mm~10mm.

[0040] In order to meet the fixing requirement of the H-shaped steel beam 4 end, the end of the H-shaped steel beam 4 has a force bearing member 12, such as a load-bearing wall, which can provide support.

[0041] The application of the inorganic glue 5 and the H-shaped steel beam 4 reinforced concrete floor 1 in the construction engineering field includes: partial or overall reinforcement of old residential, office building or shopping mall floor to meet higher live load or heavy load requirements, without the need to remove the original floor for rapid construction; when the indoor bay needs to be expanded or the load-bearing wall needs to be removed, the H-shaped steel beam is used to realize large-span floor support and build open space such as conference room, exhibition hall and commercial atrium; in the process of adding floors to the factory building or reforming the equipment area, the floor bearing capacity and overall ductility are improved, and the clearance is left for pipeline layout and equipment installation; when the bottom layer of commercial pedestrian street, vehicle passage or lobby needs to be open, the H-shaped steel beam 4 is placed behind the upper floor and supported by the end column, pier or side wall, realizing the transparent effect of the bottom layer without or with few middle columns; the workshops of steel plant, foundry, power plant boiler room and waste heat recovery room are exposed to 200-400 DEG C or even higher temperature for a long time; the underground garage, evacuation staircase and other areas with strict requirements on fire resistance; the auxiliary floor of the nuclear power plant reactor and the surrounding of the radiation shielding layer.

[0042] Embodiment 2 In another typical embodiment of the present application, as shown in Figures 1-14 A construction method of the inorganic glue 5 and the H-shaped steel beam 4 reinforced concrete floor 1 is given, which includes the following steps: The concrete floor 1 is perforated to obtain a plurality of through holes 2 distributed in sequence, and the steel bar joint 3 of the concrete floor 1 is located in the through hole 2; The H-shaped steel beam 4 top surface is provided with a connecting piece 6, the H-shaped steel beam 4 is adjusted to make its top surface adhere to the concrete floor 1 bottom surface, the connecting piece 6 is inserted into the through hole 2, and the temporary support of the H-shaped steel beam 4 is arranged; The through hole 2 is filled with anchoring material to connect the steel bar joint 3, the connecting piece 6 and the concrete floor 1, forming an upper large and lower small anchoring area; The carbon fiber cloth 9 is pasted on the surface of the concrete floor 1 in the through hole 2 distribution area, and after curing, the temporary support is removed.

[0043] Specifically, for the structure form that the H-shaped steel beam 4 end does not cooperate with the external force bearing member 12, the construction method of the inorganic glue 5 and the H-shaped steel beam 4 reinforced concrete floor 1 includes the following steps: The H-shaped steel beam 4 is 6m 4m concrete floor 1 is taken as an example, the thickness of the concrete floor 1 is 120mm, the floor reinforcement is HRB400, the diameter of the transverse longitudinal reinforcement is 8mm, the spacing is 200m, the diameter of the longitudinal longitudinal reinforcement is 10mm, the spacing is 200mm. The upper negative reinforcement of the floor is all made of steel bars with a diameter of 8mm, and the spacing of the steel bars is 200mm, wherein the negative reinforcement arranged along the long span extends into the plate by 1600mm, and the negative reinforcement arranged along the short span direction extends into the plate by 1200mm. The method for reinforcing the concrete floor 1 without support at the end of the post-H-shaped steel beam 4 in the application is used to reinforce the concrete floor 1 along the short span direction of the concrete floor 1, and the H-shaped steel beam 4 is made of one hot-rolled wide flange H-shaped steel with a length of 4000mm, a section of 300mm 300mm, a web thickness of 10mm, a flange width of 15mm, a round corner radius of 13mm, one piece of carbon fiber cloth 9 with a length of 4000mm and a width of 450mm. The reinforcement process is as shown in Figure 11 , and specifically includes: S1, the position of the steel bar node 3 in the middle of the concrete floor 1 along the short span direction is determined using a steel bar positioning instrument, and a through hole 2 is opened using an electric hammer. The determination of the spacing and size of the through hole 2 is based on the exposure of more steel bar nodes 3, the guarantee of the bearing capacity of the floor after the through hole 2, and the complete passage of the designed single group of connecting pieces 6, so the lower bottom size of the through hole 2 is 250mm 250mm, the upper top size is 350mm 350mm, showing an inverted table shape, retaining the steel bar node 3 in the through hole 2, the steel bar node 3 having intersecting transverse and longitudinal bars, the spacing of the through hole 2 being 300mm, a total of 6 through holes 2 penetrating the through hole 2, and the through hole 2 taking the long span axis of the concrete floor 1 as the central axis. The reinforced area of the concrete floor 1 takes the long span vertical line of the concrete floor 1 as the central axis, and the width is the width of the H-shaped steel beam 4, that is, 300mm, and the length is 4000mm. The concrete floor 1 after the through hole 2 is as shown in Figure 3 .

[0044] S2, the contact area between the concrete floor 1 to be reinforced and the H-shaped steel beam 4 is chiseled to increase the surface roughness.

[0045] S3, the surface of the H-shaped steel beam 4 is sandblasted to increase the surface roughness, and dry and clean compressed air is used to clean the dust and other impurities on the surface of the H-shaped steel beam 4.

[0046] S4, prepare the inorganic glue 5 for the surface protective coating 10 of the H-shaped steel beam 4, which is a high-performance magnesium phosphate inorganic glue 5, and the mass fraction components are: 100 parts of heavy burned magnesia, 2 parts of ethylenediaminetetraacetic acid disodium, 60 parts of potassium dihydrogen phosphate, 2 parts of borax, 17 parts of silica powder, 1 part of calcium chloride and 28 parts of water.

[0047] The preparation process is: mixing disodium ethylenediaminetetraacetate, potassium dihydrogen phosphate, borax, and silicon dioxide powder dry for 2 minutes. Then pour the water containing dissolved calcium chloride into the uniform mixture, stir quickly for 2 minutes. Finally, add heavy burned magnesium oxide, stir quickly until a uniform inorganic glue 5 slurry is formed (about 5 minutes), which is the inorganic glue 5 slurry of the H-shaped steel beam 4 surface protection coating 10.

[0048] S5, in the area outside the top surface of the upper flange of the H-shaped steel beam 4, apply inorganic glue 5 to form a protective coating 10, the coating thickness is 10mm, the cross section of the H-shaped steel beam 7 after applying inorganic glue is shown as Figure 4 .

[0049] S6, the H-shaped steel beam 7 after applying inorganic glue is cured for 24 hours.

[0050] S7, along the span direction of the H-shaped steel beam 4, weld 6 groups of shear connector 6 on the top surface of the upper flange of the H-shaped steel beam 7 after applying inorganic glue, the group spacing of the connector 6 is 400mm, the number of each group of connector 6 is 4, the spacing between the connectors 6 in the group is 150mm, the connector 6 is a cylindrical head weld stud with a nominal diameter of 20mm and a height of 100mm. The H-shaped steel beam 4 after welding the shear connector 6 is shown in Figure 5 , and the front view is shown in Figure 6 . The connector 6 can also be associated with the steel bar joint 3 to improve its stress performance.

[0051] S8, prepare inorganic glue 5 for bonding the H-shaped steel beam 4 and the concrete floor 1, the mixing ratio and preparation steps of the inorganic glue 5 are the same as S4. S9, apply inorganic glue 5 on the area to be reinforced of the concrete floor 1 and the top surface of the upper flange of the H-shaped steel beam 4, the application thickness is 10mm.

[0052] S10, combine the H-shaped steel beam 4 and the concrete floor 1, ensure that each group of shear connector 6 accurately extends into the corresponding through hole 2 of the concrete floor 1, and set up a temporary steel pipe scaffold support system to ensure that the H-shaped steel beam 4 and the concrete floor 1 are closely attached and the relative position is unchanged, the top view and front view of the combined H-shaped steel beam 4 and the concrete floor 1 forming a combined structure are shown in Figure 7 and Figure 8 .

[0053] S11, prepare inorganic glue 5 for anchoring the shear connector 6, the mixing ratio and preparation steps of the inorganic glue 5 are the same as S2. S12, inject inorganic glue 5 at the through hole 2 of the concrete floor 1 for anchoring, after injection, the upper surface of the through hole 2 is flush with the upper surface of the concrete floor 1.

[0054] S13, prepare the inorganic glue 5 pasting the carbon fiber cloth 9, the inorganic glue 5 is high performance magnesium phosphate inorganic glue 5, and the preparation steps are the same as S4.

[0055] S14, paste the carbon fiber cloth 9 on the surface of the reinforced concrete floor 1 using the inorganic glue 5, the length of the carbon fiber cloth 9 is 4000mm, and the width is 450mm. When pasting, first apply a thin layer of inorganic glue 5 with a thickness of 8mm, a width of 450mm, and a length of 4000mm, then align and paste the carbon fiber cloth 9 on the high performance magnesium phosphate inorganic glue 5, the thickness of the carbon fiber cloth 9 is 1mm, then apply a thin layer of inorganic glue 5 with a thickness of 5mm, a length of 4000mm, and a width of 480mm, and the edge of the width part of the carbon fiber cloth 9 is gradually thinned, so that the second layer of inorganic glue 5 completely covers the carbon fiber cloth 9, and the cross-sectional view of the carbon fiber protective coating 10 is shown in Figure 9 , the plan view and the front view of the combined structure of the H-shaped steel beam 4 and the concrete floor 1 after pasting the carbon fiber protective coating 10 are shown in Figure 10 and Figure 11 .

[0056] S15, maintain the reinforced concrete floor 1, and the maintenance time is 48 hours.

[0057] S16, after the maintenance is completed, remove the temporary support.

[0058] In other optional embodiments, for the structure form that the end of the H-shaped steel beam 4 cooperates with the external force member 12, the construction method of the inorganic glue 5 and the H-shaped steel beam 4 reinforcing the concrete floor 1 includes the following steps: Taking a 6m 4m concrete floor 1 as an example, the thickness of the concrete floor 1 is 120mm, and the specific reinforcement of the floor is shown in Figure 2 , the method of reinforcing the concrete floor 1 with the rear H-shaped steel beam 4 end supported in the application is used, the reinforcement is carried out along the short span direction of the concrete floor 1, the H-shaped steel beam 4 uses a hot-rolled wide flange H-shaped steel with a length of 3800mm, a section of 300mm 300mm, a web thickness of 10mm, a flange width of 15mm, a round corner radius of 13mm, a carbon fiber cloth 9 with a length of 4000mm and a width of 450mm, and a bearing wall thickness of 300mm. The reinforcement process is shown in Figure 12 , and specifically includes: S1, use a steel bar positioner to determine the position of the steel bar node 3 in the middle of the floor along the short span direction, and use an electric hammer to open a through hole 2, the determination of the through hole 2 spacing and the through hole 2 size is based on the exposure of more steel bar nodes 3, the guarantee of the bearing capacity of the floor after the through hole 2, and the complete passing of the designed single group connecting piece 6, so the size of the lower bottom surface of the through hole 2 is 250mm 250mm, the upper top surface size is 350mm*350mm, showing an inverted table shape, retaining the steel joint 3 in the through hole 2, the through hole 2 spacing is 300mm, a total of 6 through holes 2, and the through hole 2 is the middle axis of the floor long span. The floor reinforcement area is located at the bottom surface of the concrete floor 1, with the vertical line of the concrete floor 1 long span as the middle axis, the width is the width of the H-shaped steel beam 4, that is, 300mm, and the length is 4000mm. S2, use an electric drill to make through holes 2 in the load-bearing wall, the upper surface of the through hole 2 is flush with the lower surface of the concrete floor 1, the width of the through hole 2 is 450mm, and the height is 450mm.

[0059] S3, chisel the contact area between the concrete floor 1 to be reinforced and the H-shaped steel beam 4 to improve the surface roughness.

[0060] S4, sandblast the surface of the H-shaped steel beam 4 to increase the surface roughness, and use dry and clean compressed air to clean the dust and other impurities on the surface of the H-shaped steel beam 4.

[0061] S5, prepare the inorganic glue 5 of the H-shaped steel beam 4 surface protection coating 10, which is a high-performance magnesium phosphate inorganic glue 5, and the mass fraction components are: 100 parts of heavy-burned magnesia, 2 parts of ethylenediaminetetraacetic acid disodium, 60 parts of potassium dihydrogen phosphate, 2 parts of borax, 17 parts of silica powder, 1 part of calcium chloride and 28 parts of water.

[0062] The preparation process is: mix ethylenediaminetetraacetic acid disodium, potassium dihydrogen phosphate, borax and silica powder dry for 2 minutes. Then pour the water containing dissolved calcium chloride into the uniform mixture, and stir quickly for 2 minutes. Finally, add heavy-burned magnesia, and stir quickly until a uniform inorganic glue 5 slurry is formed (about 5 minutes), which is the inorganic glue 5 slurry of the H-shaped steel beam 4 surface protection coating 10.

[0063] S6, in the area outside the upper flange top surface of the H-shaped steel beam 4, apply inorganic glue 5 to form a protective coating 10, and the coating thickness is 10mm.

[0064] S7, maintain the H-shaped steel beam 7 coated with inorganic glue, and the maintenance time is 24 hours.

[0065] S8, determine the H-shaped steel beam 4 upper welding connector 6 condition through the concrete floor 1 through hole 2 condition, along the span direction of the H-shaped steel beam 4, weld 6 groups of stud shear connectors 6 on the upper flange top surface of the H-shaped steel beam 7 coated with inorganic glue, the group spacing of the connectors 6 is 400mm, the number of shear connectors 6 in each group is 4, and the spacing of the connectors 6 in the group is 150mm. The connector 6 is a cylindrical head welding stud with a nominal diameter of 20mm and a height of 100mm.

[0066] S9, preparing inorganic glue 5 for bonding H-shaped steel beam 4 and concrete floor 1, the mixing ratio and preparation steps of inorganic glue 5 are the same as S5. S10, applying inorganic glue 5 on the top surface of the flange of H-shaped steel beam 4 and the area to be reinforced of concrete floor 1, the thickness of inorganic glue 5 is 10mm.

[0067] S11, combining H-shaped steel beam 4 and concrete floor 1, ensuring that each group of shear connectors 6 accurately extends into the corresponding through hole 2 of concrete floor 1, and setting up a temporary steel pipe scaffold support system to ensure that H-shaped steel beam 4 and concrete floor 1 are tightly bonded by inorganic glue 5 and the relative position is unchanged, and the bonding position forms an adhesive layer 8.

[0068] S12, preparing inorganic glue 5 for anchoring shear connectors 6, the mixing ratio and preparation steps of inorganic glue 5 are the same as S5.

[0069] S13, injecting inorganic glue 5 into the through hole 2 of concrete floor 1 and the through hole 2 of load-bearing wall for anchoring, after the injection of inorganic glue 5, the upper surface of the through hole 2 of concrete floor 1 is flush with the upper surface of concrete floor 1. The through hole 2 at the end of H-shaped steel beam 4 is flush with the side surface of load-bearing wall.

[0070] S14, preparing inorganic glue 5 for pasting carbon fiber cloth 9, the inorganic glue 5 is high-performance magnesium phosphate inorganic glue 5, and the preparation steps are the same as S5.

[0071] S15, pasting carbon fiber cloth 9 on the upper surface of the reinforced area of concrete floor 1 using inorganic glue 5, the length of carbon fiber cloth 9 is 4000mm, and the width is 450mm. When pasting, first apply a thin layer of inorganic glue 5 with a thickness of 5mm, a width of 450mm, and a length of 4000mm, then align and paste carbon fiber cloth 9 on the inorganic glue 5, the thickness of carbon fiber cloth 9 is 1mm, then apply a second thin layer of inorganic glue 5 with a thickness of 8mm, a length of 4000mm, and a width of 480mm, the width of the inorganic glue 5 is wider than the width of carbon fiber cloth 9, and the edge of the inorganic glue 5 is tapered to completely cover carbon fiber cloth 9. The front view and side view of the combined structure of H-shaped steel beam 4 and concrete floor 1 after pasting carbon fiber cloth 9 are shown in Figure 13 and Figure 14 .

[0072] S16, curing the reinforced concrete floor 1 for 48 hours.

[0073] S17, after the curing is completed, the temporary support is removed.

[0074] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. An inorganic adhesive and H-beam reinforced concrete floor slab, characterized in that, It includes a concrete floor slab and H-shaped steel beams. The H-shaped steel beams are bonded to the bottom surface of the concrete floor slab. Multiple through holes are opened on the concrete floor slab along the direction of the H-shaped steel beams. The steel reinforcement nodes of the concrete floor slab are exposed in the through holes. The opening area at the top of the through holes is larger than the opening area at the bottom. Connectors that extend into the through holes are connected to the top surface of the H-shaped steel beams. Inorganic adhesive is filled in the through holes to form an anchoring zone to connect the steel reinforcement nodes, connectors and concrete floor slab. Carbon fiber cloth covering all the through holes is bonded above the through holes.

2. The inorganic adhesive and H-beam reinforced concrete floor slab as described in claim 1, characterized in that, The through hole has a gradually decreasing cross-sectional area from top to bottom, and the anchoring area formed by filling the anchoring material is frustum-shaped or trapezoidal.

3. The inorganic adhesive and H-beam reinforced concrete floor slab as described in claim 1 or 2, characterized in that, The connector is connected to the rebar node inside the through hole.

4. The inorganic adhesive and H-beam reinforced concrete floor slab as described in claim 1, characterized in that, The top of the flange plate of the H-shaped steel beam is attached to the concrete floor slab, and all surfaces except the top of the upper flange plate are covered with a protective layer.

5. The inorganic adhesive and H-beam reinforced concrete floor slab as described in claim 4, characterized in that, The carbon fiber cloth is wrapped with a protective coating, and the inorganic adhesive filling the through holes, the protective layer, and the protective coating are all made of magnesium phosphate inorganic adhesive.

6. The inorganic adhesive and H-beam reinforced concrete floor slab as described in claim 1, 2, 4, or 5, characterized in that, The two ends of the H-shaped steel beam extend into the pre-set openings of the load-bearing components and are anchored with inorganic adhesive. The load-bearing components connect to and support the H-shaped steel beam.

7. A construction method for reinforcing concrete floor slabs with inorganic adhesive and H-beams, characterized in that, include: Multiple through holes are obtained by making through-holes in the concrete floor slab, and the steel reinforcement nodes of the concrete floor slab are located in the through holes. Connectors are installed on the top surface of the H-beam. The H-beam is adjusted so that its top surface is attached to the bottom surface of the concrete floor slab. The connectors are inserted into the through holes to provide temporary support for the H-beam. Anchoring material is filled into the through hole to connect the steel reinforcement nodes, connectors and concrete floor slabs, forming an anchoring zone that is larger at the top and smaller at the bottom. Carbon fiber cloth is pasted onto the upper surface of the concrete floor slab in the area with through holes. After curing, the temporary supports are removed.

8. The construction method for reinforcing concrete floor slabs with inorganic adhesive and H-beams as described in claim 7, characterized in that, Before connecting the H-shaped steel beam to the concrete floor slab, an inorganic adhesive is applied to the top surface of its upper flange plate to form a protective layer. The carbon fiber cloth is then bonded to the top surface of the concrete floor slab with the inorganic adhesive and connected to the anchorage area.

9. The construction method for reinforcing concrete floor slabs with inorganic adhesive and H-beams as described in claim 7 or 8, characterized in that, The top surface of the H-beam is bonded to the bottom surface of the concrete floor slab using inorganic adhesive, and the connector is then connected to the steel reinforcement node inserted into the through hole.

10. The construction method for reinforcing concrete floor slabs with inorganic adhesive and H-beams as described in claim 7, characterized in that, An opening is pre-drilled in the load-bearing component below the concrete floor slab. The two ends of the H-shaped steel beam extend into the opening and are filled with inorganic adhesive. The opening supports the two ends of the H-shaped steel beam.

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