Modern building concrete beam and hollow brick floor integrated reinforcing structure and method

Abstract

The application discloses a modern building concrete beam and hollow brick floor integrated reinforcing structure and method. The structure comprises a pasted steel plate reinforcing layer, a steel wire rope mesh, a steel wire rope fixed end assembly and a sprayed two-component polymer mortar. The pasted steel plate reinforcing layer is composed of a beam bottom through steel plate and a U-shaped hoop and is fixed to the bottom surface and side surface of the concrete beam; the steel wire rope mesh is laid at the bottom of the hollow brick floor, and the end thereof is anchored to the beam top or wall top through a C-shaped steel; and the sprayed two-component polymer mortar embeds and fixes the mesh and solidifies the same into an integrated stress structure with each component. Through the beam and slab cooperative force transmission mechanism, the application effectively solves the problems of poor crack resistance and unfirm end anchoring of a single reinforcing method, significantly improves the structural bearing capacity, integrity and durability, and is suitable for reinforcing and reconstructing the beams, plates and walls of modern buildings.

Description

Technical Field

[0001] This application pertains to the field of building construction, specifically to the integrated reinforcement structure and method of concrete beams and hollow brick floor slabs in modern and contemporary architecture. Background Technology

[0002] Modern buildings (mostly constructed in the early to mid-20th century) often experience problems such as strength degradation, crack development, insufficient load-bearing capacity, and slab detachment in their concrete structures due to factors such as long service life, low initial design standards, changes in usage, increased loads, and environmental erosion. Among these, concrete beams, as the main load-bearing components of a building structure, are particularly vulnerable to damage that directly impacts the overall safety and lifespan of the building, thus requiring urgent reinforcement.

[0003] Currently, the main methods for strengthening concrete beams include increasing the cross-section, bonding steel plates, and carbon fiber reinforcement. Among these, bonding steel plates offers advantages such as convenient construction, significant strengthening effect, and good synergy with the original structure, making it widely used for reinforcing concrete components. Steel wire rope reinforcement features high tensile strength, good toughness, and excellent corrosion resistance, effectively improving the crack resistance, preventing detachment, and enhancing ductility of components. However, bonding steel plates alone has drawbacks, including insufficient crack resistance and the potential for delamination at the steel plate-concrete interface. Steel wire rope reinforcement alone suffers from insufficient connection with the surrounding structure, weak end fixation due to stress contraction, and poor synergistic stress distribution, making it difficult to meet the high-strength, surface-integration, and high-durability reinforcement requirements of modern building concrete beams. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of single reinforcement methods in the prior art and to provide an integrated reinforcement structure and method for modern building concrete beams and hollow brick floor slabs.

[0005] A modern building integrated reinforcement structure for concrete beams and hollow brick floor slabs includes: A steel plate reinforcement layer is applied to the bottom and both sides of a concrete beam. The steel plate reinforcement layer includes a continuous steel plate at the bottom of the beam and U-shaped hoops. The U-shaped hoops are spaced apart along the length of the beam. The continuous steel plate at the bottom of the beam is fixedly connected to the U-shaped hoops. Both the continuous steel plate at the bottom of the beam and the U-shaped hoops are bonded and fixed to the beam body. A wire rope mesh is installed at the bottom of a hollow brick floor slab. The wire rope mesh is a grid structure formed by crisscrossing high-strength galvanized steel wire ropes. The wire rope fixing end assembly includes C-shaped steels set on both sides of the top of the concrete beam. The C-shaped steels are pressed into the upper end of the U-shaped hoop. The C-shaped steels are fixed to the beam body with M16 chemical anchors or through bolts. The end of the wire rope mesh is anchored to the C-shaped steels to form a force transmission path between the beam and the slab. A two-component polymer mortar layer is applied to the bottom of the steel wire rope mesh and the hollow brick floor slab, embedding the steel wire rope mesh within the two-component polymer mortar layer. The two-component polymer mortar layer, together with the bonded steel plate reinforcement layer, the steel wire rope mesh, the hollow brick floor slab, and the concrete beam, are solidified into an integrated load-bearing structure.

[0006] As a preferred technical solution of the present invention, the C-shaped steel is 10# C-shaped steel, and the material is Q235B. The C-shaped steel is provided with a first opening for inserting M16 chemical anchors or through bolts and a second opening for fixing the end of the steel wire rope mesh. The first opening and the second opening are evenly spaced along the length of the C-shaped steel.

[0007] As a preferred technical solution of the present invention, the wire rope mesh is made of high-strength galvanized steel wire rope arranged in a single layer with a bidirectional @50mm spacing. The ends of the wire rope are pressed into a ring structure by metal pressure rings, and are tensioned and connected to the second opening of the C-shaped steel by adjusting screws and nuts. The ring structure is connected to the annular hole at the end of the adjusting screw, and the adjusting screw is fixed by nuts after passing through the second opening.

[0008] As a preferred embodiment of the present invention, it further includes a fixing pin anchor for preventing the wire rope mesh from sagging. The fixing pin anchor includes a metal anchor embedded in the brick joint of the hollow brick floor slab. The lower end of the metal anchor extending out of the wire rope mesh is provided with a pin, which serves as the main force-bearing component of the wire rope mesh.

[0009] As a preferred embodiment of the present invention, the bottom steel plate of the beam is 3mm thick and 250mm wide, and the U-shaped hoop is 3mm thick and 100mm wide; the C-shaped steel groove is set downward and is set along the extension direction of the beam, and the width near the side plate of the beam is greater than the length near the side plate of the wire rope; the U-shaped hoops are spaced along the length of the beam and arranged in a dense area and an undense area, with the spacing between adjacent U-shaped hoops in the dense area being 200mm and the spacing between adjacent U-shaped hoops in the undense area being 300mm.

[0010] A construction method for an integrated reinforcement structure of modern building concrete beams and hollow brick floor slabs according to any one of the above claims includes the following steps: Step 1: Surface preparation: Clean, grind and repair defects on the bottom of concrete beams and hollow brick slabs; remove rust and dirt from steel plates and wire ropes. Step 2: Steel plate bonding and U-shaped hoop installation: Apply steel bonding adhesive to the bottom and sides of the concrete beam, bond the continuous steel plate and U-shaped hoop to the bottom of the beam, and the continuous steel plate and U-shaped hoop form a bonded steel plate reinforcement layer. The C-shaped steel is fixed to the beam body with M16 chemical anchors or through bolts, while the U-shaped hoop is pressed and fixed to the beam body. The M16 chemical anchors or through bolts are inserted into or pass through the beam body through the space between adjacent U-shaped hoops. Step 3: Steel wire rope mesh laying and anchoring: Steel wire rope mesh is laid at the bottom of the hollow brick floor slab according to the design spacing. The ends of the steel wire ropes in the steel wire rope mesh are pressed into a ring structure by metal pressure rings and anchored to the C-shaped steel pre-fixed on the top of the concrete beam. The steel wire ropes are tensioned by adjusting screws and nuts. When laying the steel wire rope mesh, fixing pins and anchors are installed simultaneously to prevent the steel wire rope mesh from sagging. The pins and anchors are arranged in a quincunx pattern. Step 4: Spraying two-component polymer mortar to form a layer: Spray two-component polymer mortar layer by layer from the bottom of the hollow brick floor slab to the wire rope mesh, with manual assistance to form a two-component polymer mortar layer, and embed the wire rope mesh into the sprayed two-component polymer mortar. Step 5: Curing: Curing the two-component polymer mortar layer to solidify it into an integrated load-bearing structure with the bonded steel plate reinforcement layer, steel wire rope mesh, hollow brick floor slab, and concrete beam.

[0011] As a preferred technical solution of the present invention, in step two, the steel bonding adhesive is Grade A epoxy steel bonding adhesive, which is prepared according to the weight ratio of A:B=4:1, and the thickness of the adhesive layer is controlled at 1-3mm. The U-shaped hoops are arranged with a spacing of 200mm in the encrypted area and a spacing of 300mm in the unencrypted area.

[0012] As a preferred technical solution of the present invention, in step three, the wire rope mesh is made of high-strength galvanized steel wire rope arranged in a single layer with a bidirectional @50mm spacing. The ends of the wire rope are pressed into a ring structure by metal pressure rings, and the tension is adjusted by adjusting screws and nuts.

[0013] As a preferred technical solution of the present invention, in step three, the C-shaped steel is pressed and secured to the U-shaped hoop by M16 chemical anchors or through bolts. The M16 chemical anchors fix the C-shaped steel to the beam or wall on one side, and the through bolts connect and fix the C-shaped steel, U-shaped hoop and beam on both sides of the beam.

[0014] Compared with the prior art, the present invention has the following features and beneficial effects: This application connects the bonded steel plate reinforcement layer and the wire rope mesh with a wire rope fixing end assembly, and then wraps the entire structure within a two-component polymer mortar layer to form an integrated load-bearing structure. Specifically, the continuous steel plate at the bottom of the beam and the U-shaped hoops in the bonded steel plate reinforcement layer directly improve the load-bearing capacity and stiffness of the concrete beam, while the high-strength galvanized steel wire rope mesh significantly enhances the integrity, crack resistance, and ductility of the hollow brick slab. More importantly, by anchoring the ends of the wire rope mesh to C-shaped steel fixed at the top of the beam and connecting it to the bottom of the beam with U-shaped hoops and C-shaped steel through compression, a reliable force transmission path is established between the beam and the slab, achieving synergistic load-bearing of the two reinforcement methods. This application achieves the effect of beams and slabs working together and sharing the load, effectively solving the problems of insufficient crack resistance and easy peeling in the single bonded steel plate reinforcement method, and the poor end anchoring and cooperative load-bearing in the single wire rope reinforcement method. It significantly improves the overall stability reinforcement effect of large-span hollow brick floor slabs and meets the construction requirements of simultaneous reinforcement of concrete beams and hollow brick slabs in modern buildings. Attached Figure Description

[0015] Figure 1 This application relates to the connection between the C-shaped steel and the through bolt; Figure 2 This is a diagram illustrating the connection of the C-shaped steel M16 chemical anchor bolt involved in this application; Figure 3 This is a diagram illustrating the connection between the C-shaped steel and a single steel wire rope involved in this application. Figure 4 This diagram illustrates the positional relationship between the steel wire rope mesh and the two-component polymer mortar layer involved in this application. Figure 5 This is a diagram illustrating the connection between the wire rope mesh and the fixing pin anchor bolts involved in this application. Figure 6 This is a structural schematic diagram of the wire rope mesh involved in this application.

[0016] Attached reference numerals: 1-Steel wire rope mesh; 2-Metal pressure ring; 3-M16 chemical anchor; 4-C-shaped steel; 5-Continuous steel plate at the bottom of beam; 6-U-shaped hoop; 8-Two-component polymer mortar layer; 9-Fixing pin anchor; 91-Metal anchor; 92-Pin; 10-Adjusting bolt; 11-Nut; 12-Hollow brick floor slab; 13-Through bolt. Detailed Implementation

[0017] To make the technical means, innovative features, objectives and effects of this invention easier to understand, the invention will be further described below.

[0018] Example 1 This embodiment provides an integrated reinforcement structure for modern building concrete beams and hollow brick floor slabs, such as... Figures 1-6As shown, its core lies in achieving coordinated stress distribution between beams and slabs by combining bonded steel plates and steel wire ropes, and by using end fixing components and a two-component polymer mortar layer.

[0019] The structure includes a bonded steel plate reinforcement layer, a wire rope mesh 1, a wire rope fixing end assembly, and a two-component polymer mortar layer 8.

[0020] A steel plate reinforcement layer is applied to the bottom and both sides of the concrete beam. This layer mainly consists of a continuous steel plate 5 at the bottom of the beam and U-shaped hoops 6. The continuous steel plate 5 at the bottom of the beam is made of 3mm thick Q235B steel plate, with a width of 250mm, consistent with the original width of the concrete beam, and is arranged along the entire length of the beam. The U-shaped hoops 6 are also made of 3mm thick Q235B steel plate, with a width of 100mm, and are arranged along the length of the beam in alternating reinforced and unreinforced zones: the spacing between adjacent U-shaped hoops 6 in the reinforced zone is 200mm, and the spacing between adjacent U-shaped hoops 6 in the unreinforced zone is 300mm. The continuous steel plate 5 at the bottom of the beam and the U-shaped hoops 6 are fixedly connected by welding or bonding, and both are firmly bonded to the concrete surface of the beam using Class A epoxy steel adhesive, with the adhesive layer thickness controlled between 1-3mm. The selection of this steel plate specification and spacing is based on an in-depth analysis of the typical cross-sectional dimensions and stress characteristics of concrete beams in modern buildings, which can effectively improve the load-bearing capacity and stiffness of the beam while taking into account construction feasibility.

[0021] The steel wire rope mesh 1 is installed at the bottom of the hollow brick floor slab 12. It is composed of high-strength galvanized steel wire ropes arranged in a crisscross pattern at 50mm intervals in a single layer. The steel wire ropes used are 6×7+IWS4.5 type, which have high tensile strength, good toughness, and corrosion resistance. The ends of the steel wire ropes are pressed into rings by metal pressure rings 2 using special hydraulic clamps. After pressing, the ends of the steel wire ropes should be slightly exposed (not less than 4mm) to ensure consistent clamping force, secure installation, and prevent the steel wire ropes from loosening. The steel wire ropes are then installed in the designated positions and pre-tensioned according to design requirements to eliminate residual stress. At the same time, the integrity of the matching adjusting screws and nuts is checked to ensure smooth subsequent fixing. After pretreatment, the steel wire ropes and steel wire rope sheets are set aside to ensure that the reinforced steel wire ropes and steel wire rope sheets can work together with the steel plate and concrete structure to bear the load.

[0022] The wire rope fixing assembly is crucial for achieving coordinated load-bearing between the beam and the slab. It comprises 10# C-shaped steel sections 4 (Q235B material) positioned on both sides of the top of the concrete beam. The C-shaped steel sections 4 have their grooves facing downwards and extend continuously along the beam's length. Their cross-section is designed so that the width near the beam side is greater than the length near the wire rope side. This asymmetrical structure facilitates simultaneous anchoring to the beam and connection to the wire rope. The C-shaped steel sections 4 have evenly spaced first and second openings along their length. M16 chemical anchors 3 or through bolts 13 pass through the first opening to fix the C-shaped steel sections 4 to the beam. Simultaneously, the C-shaped steel sections 4 are pressed against the upper end of the U-shaped hoop 6, further constraining the U-shaped hoop 6. The annular structure formed at the end of the wire rope connects to the annular hole at the end of the adjusting screw 10. After the adjusting screw 10 passes through the second opening of the C-shaped steel section 4, it is tensioned and fixed by a nut 11, ensuring uniform tension of the wire rope and guaranteeing coordinated load-bearing with the steel plate and concrete structure.

[0023] To prevent the wire rope mesh 1 from sagging before the two-component polymer mortar 8 is sprayed, this embodiment also includes a fixing pin anchor 9. The fixing pin anchor 9 includes a metal anchor 91 embedded in the brick joint of the hollow brick floor slab 12. The lower end of the metal anchor 91 extending out of the wire rope mesh 1 is provided with a pin 92. The pin 92 serves as the main load-bearing component of the wire rope mesh 1 and is arranged in a quincunx pattern, effectively controlling the spatial position of the wire rope mesh 1.

[0024] A two-component polymer mortar layer 8 is applied to the bottom of the wire rope mesh 1 and the hollow brick floor slab 12, completely embedding the wire rope mesh 1 within it. The two-component polymer mortar 8 is applied using a manual-assisted, layered spraying process, ensuring a tight bond between the two-component polymer mortar layer 8 and the bonded steel plate reinforcement layer, the wire rope mesh 1, the hollow brick floor slab 12, and the concrete beam, ultimately solidifying into a unified load-bearing structure.

[0025] Example 2 This embodiment provides a construction method using the reinforcement structure described in Embodiment 1, specifically including the following steps: Step 1: Construction Preparation and Base Surface Treatment 1.1 Material and Equipment Preparation: Prepare all materials according to design requirements. The steel plates used for bonding are 3mm thick Q235B steel plates, including a 250mm wide, continuous steel plate 5 along the bottom of the beam, a 100mm wide U-shaped hoop 6, and a 100mm wide continuous steel plate strip at the intersection of the beam top and the bottom corner of the plate. M16 chemical anchors are used for steel bonding. High-strength galvanized steel wire rope of model 6×7+IWS4.5 is used, arranged in a single layer, bidirectional @50mm spacing. The end fixing uses custom-made 5mm thick 10# C-shaped steel 4 (Q235B), along with matching metal pressure rings 2, adjusting screws 10, nuts 11, etc. Grade A epoxy steel bonding adhesive is used. Angle grinders, impact drills, mixers, compressed air compressors, and other equipment are prepared, and technical briefings are completed for personnel.

[0026] 1.2 Concrete Surface Treatment: The bottom and sides of the concrete beams to be reinforced, as well as the bottom of the hollow brick floor slab 12, shall be ground to thoroughly remove any peeling, loose, corroded, or other deteriorated layers until a solid new surface is exposed. Any cracks, exposed reinforcement, or other defects shall be sealed and repaired using high-strength polymer repair mortar. After grinding, the external corners of the concrete surface shall be rounded to a radius of not less than 5mm, and surface dust shall be blown away with compressed air.

[0027] 1.3 Steel Surface Treatment: All bonded surfaces of steel plates shall be derusted and ground, with the grinding lines perpendicular to the direction of force, until a uniform metallic luster appears. The wire rope and its accessories shall be visually inspected to ensure there are no defects such as broken wires or rust.

[0028] Step 2: Laying out and positioning lines On the prepared bottom and sides of the concrete beam, mark the steel plate pasting positions according to the design drawings, with each side 50mm larger than the actual pasting steel plate size. At the same time, mark the C-shaped steel 4 layout lines on the corresponding positions on the sides of the concrete beam and the top of the U-shaped hoop 6, and accurately mark the positions of the first and second openings on the C-shaped steel 4.

[0029] Step 3: Steel plate cutting, drilling, and wire rope pretreatment Cut the steel plates according to the layout positions. The continuous steel plate 5 at the bottom of the beam is cut along the entire beam length, and the U-shaped hoop 6 is cut according to the beam cross-section dimensions. According to the arrangement requirements of the M16 chemical anchors 3, drill holes at the corresponding positions on the steel plates, with the hole diameter slightly larger than the anchor diameter. Cut the wire rope to the designed length, and press the ends with metal pressure rings 2 to form a ring structure. After pressing, the exposed length of the wire rope end should not be less than 4mm. Inspect and prepare the adjusting screw 10 and nut 11 for future use.

[0030] Step 4: Anchor Bolt Installation At the corresponding location of the steel plate bonding position line, drill holes using an impact drill. The hole diameter and depth should conform to the installation specifications for M16 chemical anchors 3. Blow away the dust inside the hole with compressed air, inject the matching chemical agent, and insert the M16 chemical anchor 3. After the chemical agent has completely cured, proceed to the next process.

[0031] Step 5: Steel plate bonding and U-shaped hoop installation Prepare the steel bonding adhesive by weight ratio A:B = 4:1, stir evenly, and use within 40 minutes. Apply the adhesive to both the prepared concrete surface and the steel plate bonding surface simultaneously, controlling the adhesive layer thickness to 1-3mm, thicker in the middle and thinner at the edges. Attach the continuous steel plate 5 at the bottom of the beam to the predetermined position, aligning it with the anchor bolt holes, and tighten the M16 chemical anchor bolts 3, allowing the adhesive to squeeze out from the edge of the steel plate. Clean up any excess adhesive. Then install the U-shaped hoop 6, also using the steel bonding adhesive, and fix it with temporary supports. After the steel bonding adhesive has initially cured, gently tap it with a hammer to check for hollow areas; any areas found need to be repaired with adhesive. Finally, fix the C-shaped steel 4 to the beam using M16 chemical anchor bolts 3 or through bolts 13, while simultaneously pressing the upper end of the U-shaped hoop 6 under the C-shaped steel 4. For cases with beams on both sides, through bolts 13 can be used to connect and fix the C-shaped steel 4, U-shaped hoop 6, and beams on both sides; for a single-sided wall, M16 chemical anchor bolts 3 can be used to fix the C-shaped steel 4 to the wall.

[0032] Step Six: Laying and Anchoring of Wire Rope Mesh Steel wire rope mesh 1 is laid at the bottom of the hollow brick floor slab 12 in a single layer at 50mm intervals in both directions. The ring structure at the end of the steel wire rope is connected to the ring hole at the end of the adjusting screw 10. After the adjusting screw 10 passes through the second opening of the C-shaped steel 4, it is initially fixed with a nut 11. Then, the steel wire rope is gradually tensioned by tightening the nut 11 to ensure that the overall tension of the steel wire rope mesh 1 is uniform and without slack. During the laying of the steel wire rope mesh 1, the fixing pins and anchors 9 are installed simultaneously: metal anchors 91 are inserted into the brick joints of the hollow brick floor slab 12, so that the pins 92 at their lower ends lock the steel wire rope mesh 1 to prevent it from sagging. The pins and anchors 9 are arranged in a quincunx pattern.

[0033] Step 7: Spraying two-component polymer mortar to form a mold Two-component polymer mortar is sprayed layer by layer from the bottom of the hollow brick floor slab 12 towards the wire rope mesh 1. Manual application is used during spraying to ensure the mortar is dense and uniform, completely encasing and embedding the wire rope mesh 1 within the two-component polymer mortar layer 8. The surface of the two-component polymer mortar layer 8 should be flush with or slightly lower than the original floor slab bottom surface to ensure that the reinforcement does not significantly increase the structure's self-weight.

[0034] Step 8: Maintenance After the two-component polymer mortar layer 8 has set, it should be cured promptly. The curing environment temperature should be controlled between 5-35℃, avoiding direct sunlight, rain erosion, and vibration. No additional load should be applied to the reinforced components during the curing period, and the curing time should not be less than 7 days. After the two-component polymer mortar layer 8 reaches the design strength, the steel plate reinforcement layer, steel wire rope mesh 1, two-component polymer mortar layer 8, hollow brick floor slab 12, and concrete beam are bonded together to form an integrated load-bearing structure, which will jointly bear the subsequent service load. The bottom surface of the brick floor slab, from top to bottom, consists of interface agent, two-component polymer mortar layer 8 (embedded with stainless steel wire rope mesh, preferably 40mm thick), and sealant.

[0035] Example 3 This embodiment provides an integrated reinforcement structure and method for modern building concrete walls and hollow brick floor slabs. The difference between this embodiment and Embodiment 1 is that the object of reinforcement is a concrete wall rather than a concrete beam. Therefore, the continuous steel plate 5 and U-shaped hoop 6 at the bottom of the beam are removed from the structure to adapt to the stress characteristics and structural requirements of the wall.

[0036] The structure includes a bonded steel plate reinforcement layer, a wire rope mesh 1, a wire rope fixing end assembly, and a two-component polymer mortar layer 8.

[0037] The steel wire rope mesh 1 is set at the bottom of the hollow brick floor slab 12. Its structure is the same as that in Example 1. It is formed by crisscrossing high-strength galvanized steel wire ropes in a single layer at a spacing of 50mm to form a grid structure.

[0038] The wire rope fixing assembly is also crucial for achieving coordinated stress distribution on the wall panels. It includes 10# C-shaped steel beams 4 (Q235B material) positioned at the top of the concrete wall (or on both sides of the top). The grooves of the C-shaped steel beams 4 face the floor slab and extend continuously along the wall's length. The C-shaped steel beams 4 have evenly spaced first and second openings along their length. M16 chemical anchor bolts 3 pass through the first opening to fix the C-shaped steel beams 4 to the top of the wall. The ring structure formed at the end of the wire rope connects to the annular hole at the end of the adjusting screw 10. After the adjusting screw 10 passes through the second opening of the C-shaped steel beams 4, it is tensioned and fixed by nuts 11, ensuring uniform tension of the wire rope. Unlike Example 1, since the wall lacks a U-shaped hoop structure, the C-shaped steel beams 4 are directly pressed against the concrete surface at the top of the wall and anchored to the wall by the M16 chemical anchor bolts 3.

[0039] To prevent the wire rope mesh 1 from sagging before shotcreting, this embodiment is also equipped with fixing pin anchors 9, which are the same in structure and arrangement as in embodiment 1, and are arranged in a quincunx pattern.

[0040] A two-component polymer mortar layer 8 is applied to the bottom of the wire rope mesh 1 and the hollow brick floor slab 12, completely embedding the wire rope mesh 1 inside it, and solidifying it together with the bonded steel plate reinforcement layer, the wire rope mesh 1, the hollow brick floor slab 12 and the concrete wall into an integrated load-bearing structure.

[0041] The construction method in this embodiment is as follows: Step 1: Construction Preparation and Base Surface Treatment The surface treatment is performed on the concrete wall surface, including grinding, defect repair, cleaning, etc., and the treatment standards are the same as in Example 2.

[0042] Step 2: Laying out and positioning lines On the prepared concrete wall, mark the layout lines of C-shaped steel 4 at the top of the wall, and accurately mark the positions of the first and second openings on the C-shaped steel 4.

[0043] Step 3: Anchor Bolt Installation At the location corresponding to the steel plate pasting position line and at the fixed position of the C-shaped steel 4 at the top of the wall, holes are drilled using an impact drill, and M16 chemical anchors 3 are inserted. The operation requirements are the same as in Example 2.

[0044] Step 5: Steel Plate Pasting and Installation Prepare the adhesive according to the specified ratio. Attach the continuous steel plate and horizontal strip to the predetermined positions on the wall, aligning them with the anchor bolt holes. Tighten the M16 chemical anchors 3, allowing the adhesive to squeeze out from the edges of the steel plate. Clean up any excess adhesive. After the adhesive has initially cured, check for any hollow areas and apply additional adhesive. Then, fix the C-shaped steel 4 to the top of the wall using the M16 chemical anchors 3, ensuring that the groove of the C-shaped steel 4 faces the floor slab and is installed horizontally.

[0045] Step Six: Laying and Anchoring of Wire Rope Mesh Steel wire rope mesh 1 is laid at the bottom of the hollow brick floor slab 12 in a single layer at 50mm intervals in both directions. The ring structure at the end of the steel wire rope is connected to the ring hole at the end of the adjusting screw 10. After the adjusting screw 10 passes through the second opening of the C-shaped steel 4, it is initially fixed with a nut 11. Then, the steel wire rope is gradually tensioned by tightening the nut 11 to ensure that the overall tension of the steel wire rope mesh 1 is uniform and without slack. The fixing pins and anchors 9 are installed simultaneously to prevent the steel wire rope mesh 1 from sagging.

[0046] Step 7: Spraying two-component polymer mortar to form 8. Two-component polymer mortar layer 8 is sprayed layer by layer from the bottom of the hollow brick floor slab 12 to the wire rope mesh 1, completely wrapping and embedding the wire rope mesh 1 inside the two-component polymer mortar layer 8.

[0047] Step 8: Maintenance Curing was performed according to the requirements of Example 2, so that the two-component polymer mortar layer 8, the wire rope mesh 1, the hollow brick floor slab 12, and the concrete wall were solidified into an integrated load-bearing structure.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modern building integrated reinforcement structure for concrete beams and hollow brick floor slabs, characterized in that, include: A steel plate reinforcement layer is attached to the bottom and both sides of a concrete beam. The steel plate reinforcement layer includes a continuous steel plate (5) at the bottom of the beam and a U-shaped hoop (6). The U-shaped hoop (6) is arranged at intervals along the length of the beam. The continuous steel plate (5) at the bottom of the beam is fixedly connected to the U-shaped hoop (6). Both the continuous steel plate (5) at the bottom of the beam and the U-shaped hoop (6) are attached and fixed to the beam body. A wire rope mesh (1) is set at the bottom of a hollow brick floor slab. The wire rope mesh (1) is a grid structure formed by crisscrossing high-strength galvanized steel wire ropes. The wire rope fixing end assembly includes C-shaped steel (4) set on both sides of the top of the concrete beam. The C-shaped steel (4) is pressed into the upper end of the U-shaped hoop (6). The C-shaped steel (4) is fixed to the beam body with M16 chemical anchors (3) or through bolts (13). The end of the wire rope mesh (1) is anchored to the C-shaped steel (4) to form a force transmission path between the beam and the plate. A two-component polymer mortar layer (8) is applied to the wire rope mesh (1) and the bottom of the hollow brick floor slab, embedding the wire rope mesh (1) inside the two-component polymer mortar layer (8). The two-component polymer mortar layer (8), the bonded steel plate reinforcement layer, the wire rope mesh (1), the hollow brick floor slab, and the concrete beam are solidified into an integrated load-bearing structure.

2. The integrated reinforcement structure of modern building concrete beams and hollow brick floor slabs according to claim 1, characterized in that, The C-shaped steel (4) is a 10# C-shaped steel with Q235B material. The C-shaped steel (4) has a first opening for inserting an M16 chemical anchor (3) or a through bolt (13) and a second opening for fixing the end of the wire rope of the wire rope mesh (1). The first opening and the second opening are evenly spaced along the length of the C-shaped steel (4).

3. The integrated reinforcement structure of modern building concrete beams and hollow brick floor slabs according to claim 2, characterized in that, The wire rope mesh (1) is made of high-strength galvanized steel wire rope arranged in a single layer with a bidirectional @50mm spacing. The ends of the wire rope are pressed into a ring structure by metal pressure rings (2), and are tensioned and connected to the second opening of the C-shaped steel (4) by adjusting screws (10) and nuts (11). The ring structure is connected to the annular hole at the end of the adjusting screw (10), and the adjusting screw (10) is fixed by nuts (11) after passing through the second opening.

4. The integrated reinforcement structure of modern building concrete beams and hollow brick floor slabs according to claim 2, characterized in that, It also includes a fixing pin anchor (9) for preventing the wire rope mesh (1) from sagging. The fixing pin anchor (9) includes a metal anchor (91) embedded in the brick joint of the hollow brick floor slab (12). The lower end of the metal anchor (91) extending out of the wire rope mesh (1) is provided with a pin (92). The pin (92) serves as the main force-bearing component of the wire rope mesh (1).

5. The integrated reinforcement structure of modern building concrete beams and hollow brick floor slabs according to claim 1, characterized in that, The bottom steel plate (5) of the beam is 3mm thick and 250mm wide, and the U-shaped hoop (6) is 3mm thick and 100mm wide. The C-shaped steel (4) has its groove facing downward and is set along the entire length of the beam. The width of the side plate near the beam is greater than the length of the side plate near the wire rope. The U-shaped hoops (6) are spaced along the length of the beam and are arranged in a dense area and an undense area. The spacing between adjacent U-shaped hoops (6) in the dense area is 200mm, and the spacing between adjacent U-shaped hoops (6) in the undense area is 300mm.

6. A construction method for an integrated reinforcement structure of modern building concrete beams and hollow brick floor slabs according to any one of claims 1 to 5, characterized in that, Includes the following steps: Step 1: Surface preparation: Clean, grind and repair defects on the bottom of concrete beams and hollow brick slabs; remove rust and dirt from steel plates and wire ropes. Step 2: Steel plate bonding and U-shaped hoop installation: Apply steel bonding adhesive to the bottom and sides of the concrete beam, bond the continuous steel plate (5) and U-shaped hoop (6) at the bottom of the beam. The continuous steel plate (5) and U-shaped hoop (6) at the bottom of the beam form a bonded steel plate reinforcement layer. The C-shaped steel (4) is fixed to the beam body by M16 chemical anchors (3) or through bolts (13). At the same time, the U-shaped hoop (6) is pressed onto the beam body. The M16 chemical anchors (3) or through bolts (13) are inserted into or pass through the beam body through the space between adjacent U-shaped hoops (6). Step 3: Steel wire rope mesh laying and anchoring: Steel wire rope mesh (1) is laid at the bottom of the hollow brick floor slab according to the design spacing. The ends of the steel wire ropes of the steel wire rope mesh (1) are pressed into a ring structure by metal pressure rings (2) and anchored to the C-shaped steel (4) that is pre-fixed on the top of the concrete beam. The steel wire rope is tensioned by adjusting screws (10) and nuts (11). When laying the steel wire rope mesh, the fixing pins and anchors (9) are installed simultaneously to prevent the steel wire rope mesh (1) from sagging. The pins and anchors (9) are arranged in a quincunx pattern. Step 4: Spraying two-component polymer mortar to form a layer: Spray two-component polymer mortar layer by layer from the bottom of the hollow brick floor slab to the wire rope mesh (1), and manually assist in the application to form a two-component polymer mortar layer (8). Embed the wire rope mesh (1) inside the two-component polymer mortar layer (8). Step 5: Curing: Curing the two-component polymer mortar layer (8) to solidify the two-component polymer mortar layer (8) with the bonded steel plate reinforcement layer, steel wire rope mesh (1), hollow brick floor slab and concrete beam into an integrated load-bearing structure.

7. The construction method according to claim 6, characterized in that, In step two, the steel bonding adhesive is Grade A epoxy steel bonding adhesive, prepared according to the weight ratio of A:B=4:1, and the thickness of the adhesive layer is controlled at 1-3mm. The U-shaped hoop (6) is arranged with a spacing of 200mm in the encrypted area and a spacing of 300mm in the unencrypted area.

8. The construction method according to claim 6, characterized in that, In step three, the wire rope mesh (1) is made of high-strength galvanized steel wire rope arranged in a single layer with a bidirectional @50mm spacing. The ends of the wire rope are pressed into a ring structure by metal pressure rings (2), and the tension is adjusted by adjusting screws (10) and nuts (11).

9. The construction method according to claim 6, characterized in that, In step three, the C-shaped steel (4) is pressed against the U-shaped hoop (6) by M16 chemical anchors (3) or through bolts (13). The M16 chemical anchors (3) fix the C-shaped steel (4) to the beam or wall on one side, and the through bolts (13) connect and fix the C-shaped steel (4), U-shaped hoop (6) and beam on both sides of the beam.

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