Supporting layer for existing building reconstruction

Abstract

A supporting layer for existing building transformation belongs to the technical field of building transformation and comprises a plurality of reinforcing beams, the reinforcing beams are arranged between adjacent existing frame columns in a transversely and longitudinally staggered mode, the reinforcing beams are fixedly connected with the adjacent existing frame columns, the adjacent reinforcing beams are fixedly connected, and the reinforcing beams are located above existing floor plates. A steel plate is fixedly arranged above the reinforcing beam, and a concrete surface layer is poured on the steel plate. The supporting layer is integrally arranged above the existing floor, and the supporting layer is fixedly connected with the existing frame columns, so that reinforcing construction of the lower-layer space of the existing building is avoided, and the construction working face is reduced. The problems that an existing building transformation mode is carried out on the lower layer of an existing floor beam and plate, the existing floor beam and plate are directly transformed, limitation is large, construction is difficult, and expected bearing capacity improvement is difficult to achieve are solved.

Description

Technical Field

[0001] This utility model relates to the field of building renovation technology, and in particular to a support layer for the renovation of existing buildings. Background Technology

[0002] In the context of urban renewal, a large number of existing buildings need to be renovated. Increasing the load on the floor is one of the more common renovations. For conventional civil buildings, the design limit for floor live load is generally 200 kg / m², while some archives, computer rooms, etc., require loads that can reach 100 kg / m². Therefore, when ordinary rooms are converted into archives, computer rooms, etc., the floor beams and floor slabs often cannot meet the load-bearing requirements and need to be reinforced.

[0003] Existing reinforcement methods are generally carried out on the lower level of the room being renovated. For example, multiple support rods are used to support the floor slab; or steel plates or steel beams are added directly to the bottom of the floor slab; or the original floor beams and floor slabs are directly reinforced to improve the load-bearing capacity of the floor.

[0004] When reinforcing floor beams and slabs on the floor below the room being renovated, the construction process generates significant pollution and damage. Furthermore, the different property rights of each floor in residential buildings restrict the reinforcement and renovation of the floor below, making the renovation project impossible. In addition, the existing renovation methods use the existing floor beams and slabs as the basis for reinforcement and renovation, which is complex and difficult. Moreover, the reinforcement and renovation effect is limited by the structure of the existing floor beams and slabs themselves, making it difficult to achieve the expected improvement in load-bearing capacity. Utility Model Content

[0005] To address the existing methods of modifying existing buildings as described in the background, which typically involve modifying the existing floor beams and slabs directly, resulting in significant limitations, construction difficulties, and a failure to achieve the expected increase in load-bearing capacity, this utility model provides a support layer for modifying existing buildings.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a support layer for the renovation of existing buildings, including several reinforcing beams. These reinforcing beams are arranged in a crisscross pattern between adjacent existing frame columns. The reinforcing beams are fixedly connected to adjacent existing frame columns and to each other. The reinforcing beams are located above the existing floor slab, avoiding the need to reinforce the lower level of the renovated room, reducing the construction work surface, and effectively reducing the cost of the existing building renovation project. A steel plate is fixedly installed above the reinforcing beams. The steel plate is used to support the concrete surface layer and can also serve as a formwork during the concrete surface layer pouring stage, reducing the use of formwork, simplifying the construction process, and lowering costs. During use, the steel plate and the concrete surface layer share the load, bearing the load on the concrete surface layer and transferring the load to the existing frame columns through the steel plate and reinforcing beams, effectively improving the load-bearing capacity of the concrete surface layer. The concrete surface layer is poured on the steel plate and mainly serves as the floor of the renovated room, facilitating office work and improving the comfort of the renovated room.

[0008] Preferably, there is a gap between the reinforcing beam and the existing floor slab, which provides space for the deformation of the reinforcing beam when it is under load, avoids mutual interference between the reinforcing beam and the existing floor slab during the deformation process, ensures that the reinforcing beam can independently and effectively play its load-bearing role, and allows the weight of the archive room to be directly transferred to the existing frame columns through the reinforcing beam, without passing through the existing floor slab and floor beam, thereby improving the stability and reliability of the entire support layer structure.

[0009] Preferably, the distance between the reinforcing beam and the existing floor slab is not less than 1.5 times the deflection of the reinforcing beam. This ensures that even under large loads, when the reinforcing beam undergoes large deflection deformation, it will not come into contact with the existing floor slab, thus maximizing the normal operation of the reinforcing beam and further enhancing the safety and durability of the supporting structure.

[0010] Preferably, a connecting plate is fixedly installed on the outer perimeter of the existing frame column, and the reinforcing beam is fixedly connected to the connecting plate. The setting of the connecting plate provides a reliable connection node between the reinforcing beam and the existing frame column, so that the reinforcing beam can be stably connected to the existing frame column, thereby more effectively transferring the load borne by the reinforcing beam to the existing frame column, enhancing the collaborative working ability between the entire support system and the existing building structure, and improving the overall structural performance of the existing building after renovation.

[0011] Preferably, the connecting plate is wrapped around the outer wall of the existing frame column. The connecting plate is fixedly connected to the existing frame column by anchor bolts, and the connecting plate and the existing frame column are bonded together with structural adhesive. The connection plate wrapping around the outer wall of the existing frame column, combined with anchor bolt fixing and structural adhesive bonding, greatly improves the strength of the connection between the connecting plate and the existing frame column. The anchor bolts provide strong mechanical anchoring force, while the structural adhesive fills the tiny gaps between the connecting plate and the existing frame column, enhancing the integrity and sealing of the connection, and further ensuring the smoothness and stability of load transfer between the reinforcing beam and the existing frame column.

[0012] Preferably, the anchor bolts are tension bolts, which can apply fastening force from both sides of the existing frame column simultaneously, making the connection plate and the existing frame column more evenly stressed in the horizontal direction. This effectively prevents the connection plate from shifting or deforming during the stress process, improves the reliability and stability of the connection, ensures the firmness of the connection between the entire support system and the existing frame column, and facilitates the effective transfer of loads.

[0013] Preferably, a first stiffening rib is fixed between the connecting plate and the reinforcing beam. The first stiffening rib enhances the strength and rigidity of the connection between the connecting plate and the reinforcing beam, effectively disperses the concentrated load transmitted from the reinforcing beam to the connecting plate, reduces stress concentration at the connection, and prevents deformation and cracking under long-term load. This further improves the load-bearing capacity and stability of the connection node and ensures the safety performance of the entire support layer structure.

[0014] Preferably, the bottom of the steel plate is fixed with several second stiffening ribs, which enhances the bending resistance of the steel plate, enabling it to better maintain its planar shape when bearing the concrete surface layer and the load on it, reducing deformation and improving the load-bearing capacity of the steel plate. At the same time, the second stiffening ribs can also transfer the load borne by the steel plate to the reinforcing beam more evenly, further optimizing the stress distribution of the support layer structure and improving the load-bearing capacity and stability of the entire support system.

[0015] As can be seen from the above technical solutions, the advantages of this utility model are:

[0016] 1. The support layer is set above the existing floor and is fixedly connected to the existing frame columns, avoiding the need to reinforce the lower floor of the renovated room, reducing the construction work surface, and effectively reducing the cost of the existing building renovation project. A steel plate is fixedly installed above the reinforcing beam. The steel plate is used to support the concrete surface layer and can also be used as a formwork during the concrete surface layer pouring stage, reducing the use of formwork, simplifying the construction process, and reducing costs. During the use stage, the steel plate and the concrete surface layer share the load, bearing the load on the concrete surface layer and transferring the load to the existing frame columns through the steel plate and reinforcing beam, effectively improving the load-bearing capacity of the concrete surface layer. The concrete surface layer is poured on the steel plate and is mainly used as the floor of the renovated room, facilitating office work and improving the comfort of the renovated room.

[0017] 2. The spacing between the reinforcing beam and the existing floor slab provides space for the deformation of the reinforcing beam under load, avoiding interference between the reinforcing beam and the existing floor slab during deformation. This ensures that the reinforcing beam can independently and effectively perform its load-bearing function, allowing the weight of the archive room to be directly transferred to the existing frame columns through the reinforcing beam, without passing through the existing floor slab and floor beams, thereby improving the stability and reliability of the entire support layer structure.

[0018] 3. The installation of the connecting plate facilitates the fixed connection between the reinforcing beam and the existing frame column. The connecting plate is fixed to the existing frame column by anchor bolts and is also bonded to the existing frame column with structural adhesive. The connecting plate covers the outer wall of the existing frame column. Combined with anchor bolt fixing and structural adhesive bonding, the connection between the connecting plate and the existing frame column is greatly improved. The anchor bolts provide strong mechanical anchoring force, while the structural adhesive fills the tiny gaps between the connecting plate and the existing frame column, enhancing the integrity and sealing of the connection, and further ensuring the smoothness and stability of load transfer between the reinforcing beam and the existing frame column. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the steel beam layout of the support layer for the renovation of an existing building according to one or more embodiments of the present invention.

[0021] Figure 2 This is a cross-sectional structural diagram of a support layer for the renovation of an existing building according to one or more embodiments of the present invention.

[0022] Figure 3 This is a schematic diagram of the connection node between the support layer and the existing frame column according to one or more embodiments of the present invention.

[0023] Figure 4 This is a schematic diagram showing the position of the steel beams and existing frame columns and existing floor slabs according to one or more embodiments of the present invention.

[0024] The components represented by the various reference numerals in the diagram are:

[0025] 1. Existing frame columns; 2. Existing floor slabs; 3. Reinforcing beams; 4. Connecting plates; 5. First stiffening rib; 6. Anchor bolts; 7. Steel plates; 8. Second stiffening ribs; 9. Concrete surface layer. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0027] Example 1

[0028] In a typical embodiment of this utility model, such as Figures 1-4 As shown, a support layer for the renovation of existing buildings is proposed, comprising: reinforcing beams 3, steel plates 7, and a concrete surface layer 9. Several reinforcing beams 3 are arranged in a crisscross pattern between adjacent existing frame columns 1. The two ends of each reinforcing beam 3 are rigidly fixed to the adjacent existing frame columns 1 and to adjacent reinforcing beams 3. Several reinforcing beams 3 are combined to form a reinforcing beam layer. Steel plates 7 are fixedly mounted on the reinforcing beam layer, and the concrete surface layer 9 is fixedly mounted on the steel plates 7. The reinforcing beams 3 are located above the existing floor slab 2, avoiding the need for reinforcement of the lower level of the renovated room, reducing the construction work surface, and effectively reducing the cost of the existing building renovation project. Furthermore, the spacing between the reinforcing beams 3 and the existing floor slab 2 ensures that the weight of the archive room is directly transferred to the existing frame columns 1 through the reinforcing beams 3, without passing through the existing floor slab 2 and floor beams, thus avoiding the need for reinforcement of the existing floor slab 2 and floor beams. The required load-bearing capacity can be designed according to the actual project needs, breaking the constraints of the existing structure's load-bearing capacity limitations.

[0029] Specifically, reinforced beam 3 is a steel beam structure, such as... Figure 1 As shown, a reinforcing beam 3 is fixedly connected between adjacent existing frame columns 1, and several reinforcing beams 3 are fixedly connected between adjacent reinforcing beams 3 along the axial direction. The reinforcing beams 3 are the main load-bearing components, such as... Figure 4 As shown, there is a gap between the reinforcing beam 3 and the existing floor slab 2. The gap between the reinforcing beam 3 and the existing floor slab 2 is not less than 1.5 times the deflection of the reinforcing beam. In this embodiment, the gap between the reinforcing beam 3 and the existing floor slab 2 is not less than 50mm, which ensures that the weight of the archive room is directly transferred to the existing frame column 1 through the reinforcing beam 3, without passing through the existing floor slab 2 and floor beams, thus avoiding the need to reinforce the existing floor slab 2 and floor beams.

[0030] In this embodiment, the reinforcing beam 3 is a wide-flange H-beam. The end of the reinforcing beam 3 is rigidly fixed to the existing frame column 1, which can effectively reduce the cross-sectional size of the reinforcing beam 3, thereby reducing the overall height of the reinforcing beam 3 and ensuring the net height of the renovated room.

[0031] It is understood that in other embodiments, the reinforcing beam 3 may also adopt a rectangular steel tube or other structure. The specific structure can be selected according to actual needs, and no further restrictions are imposed here.

[0032] like Figure 2 As shown, steel plate 7 is laid on the flange of reinforcing beam 3. Steel plate 7 is welded and fixed to reinforcing beam 3. In this embodiment, steel plate 7 is made of patterned steel plate, which has high strength and can withstand greater pressure and weight. It can be used in occasions with high load-bearing requirements. Steel plate 7 is used to support concrete surface layer 9 and can also be used as a template during the pouring stage of concrete surface layer 9, reducing the use of templates, simplifying the construction process and reducing costs. During the use stage, steel plate 7 and concrete surface layer 9 share the load, bear the load on concrete surface layer 9, and transfer the load to the existing frame column 1 through steel plate 7 and reinforcing beam 3, effectively improving the load-bearing capacity of concrete surface layer 9.

[0033] In this embodiment, the concrete surface layer 9 is a fine stone concrete layer, mainly used as the floor of the renovated room to facilitate office work and improve the comfort of the renovated room. In this embodiment, the concrete surface layer 9 is 40mm thick and is equipped with a steel reinforcement frame to prevent the concrete surface layer 9 from cracking.

[0034] It is understood that in other embodiments, the concrete surface layer 9 may also be made of cement pressure board, and the specific structure can be selected according to actual needs, without making too many restrictions here.

[0035] like Figure 2As shown, in order to improve the overall rigidity of the steel plate 7, several second stiffening ribs 8 are fixedly provided at the bottom of the steel plate 7. The second stiffening ribs 8 are fixedly provided on the lower surface of the steel plate 7 by welding. Several second stiffening ribs 8 are arranged at intervals. In this embodiment, the spacing between adjacent second stiffening ribs 8 is 800mm, so as to improve the in-plane rigidity and bending bearing capacity of the steel plate 7 by using the second stiffening ribs 8, and at the same time reduce the deflection of the steel plate 7, so as to help reduce the distance between the support layer and the existing floor slab 2, thereby ensuring the net height of the renovated room.

[0036] In this embodiment, the end of the reinforcing beam 3 is fixedly connected to the existing frame column 1 by welding. Specifically, a connecting plate 4 is fixedly provided on the outer periphery of the existing frame column 1. The connecting plate 4 is fixedly connected to the existing frame column 1 by anchor bolts 6, and the reinforcing beam 3 is fixedly connected to the connecting plate 4 by welding.

[0037] like Figure 3 As shown, a connecting plate 4 is provided on the outer perimeter of each existing frame column 1. Two oppositely arranged connecting plates 4 are fixedly connected by anchor bolts 6. The anchor bolts 6 pass through the existing frame column 1 and are tensioned structures. The anchor bolts 6 in different directions are staggered to meet the net distance requirements of the anchor bolts 6. The connecting plate 4 and the existing frame column 1 are also bonded and fixed by adhesive injection to eliminate the gap between the connecting plate 4 and the existing frame column 1 and improve the connection firmness between the connecting plate 4 and the existing frame column 1.

[0038] The end of the reinforcing beam 3 is fixedly connected to the adjacent connecting plate 4 by welding, and the connecting plate 4 and the reinforcing beam 3 are also fixedly connected by the first stiffening rib 5. The first stiffening rib 5 is fixedly connected to the flange of the reinforcing rib 3 and the connecting plate 4 by welding, so as to share the tensile force of the connection between the flange of the reinforcing beam 3 and the connecting plate 4, enhance the local stability of the connecting plate 4, and improve the load-bearing capacity of the connection node.

[0039] In this embodiment, the connecting plate 4 is composed of four steel plates. In other embodiments, the connecting plate 4 can also be welded from two channel steel plates. The connecting plate 4 covers the existing frame column 1. The connecting plate 4 and the existing frame column 1 are fixed by anchor bolts 6. Structural adhesive is injected between the connecting plate 4 and the existing frame column 1. The structural adhesive can enhance the connection between the connecting plate 4 and the existing frame column 1.

[0040] The connecting plate 4 is wrapped around the existing frame column 1 and a tie bolt 6 is installed. At the same time, a first stiffening rib 5 is installed between the connecting plate 4 and the reinforcing beam 3, and structural adhesive is injected between the connecting plate 4 and the existing frame column 1. This can ensure the transmission of bending moment and shear force at the end of the reinforcing beam 3, and ensure that the end nodes of the reinforcing beam 3 can be set as rigid connections.

[0041] It is understandable that when the existing frame column 1 is a steel column structure, the use of the connecting plate 4 can be eliminated. In this case, the reinforcing beam 3 can be directly fixedly connected to the existing frame column 1 by welding. There are no restrictions on the fixing method of the reinforcing beam 3, as long as the fixed connection between the reinforcing beam 3 and the existing frame column 1 can be guaranteed.

[0042] In this embodiment, the main load-bearing components are all made of steel, which effectively improves the ease of construction and shortens the construction period.

[0043] The specific construction process is as follows:

[0044] Remove the decorations from the surface of the existing frame column 1, and use a rebar locator to locate and mark the original rebar positions;

[0045] Drill holes according to the requirements of anchor bolt 6, then use a high-pressure air gun to clean the dust in the hole, and clean the hole with alcohol;

[0046] Clean the surface of the existing frame column 1 of debris, install the connecting plate 4, weld and fix the adjacent connecting plates 4 together, and then install and tighten the anchor bolts 6;

[0047] Install the reinforcing beam 3, weld and fix the end of the reinforcing beam 3 to the adjacent connecting plate 4 / reinforcing beam 3, and weld the first stiffening rib 5 between the connecting plate 4 and the adjacent reinforcing beam 3;

[0048] Structural adhesive is injected into the anchor bolt duct and between the connecting plate 4 and the existing frame column 1. Specifically, latex cement is applied between the upper and lower sides of the connecting plate 4 and the existing frame column 1 to seal the upper and lower sides of the connecting plate 4. Vent holes are reserved at the latex cement on the upper side of the connecting plate 4 and injection holes are reserved at the latex cement on the lower side of the connecting plate 4. Structural adhesive is injected into the space between the connecting plate 4 and the existing frame column 1 through the injection holes. The injection is completed when the structural adhesive flows out from the vent holes.

[0049] After welding is completed between the connecting plate 4 and the reinforcing beam 3, adhesive is injected to effectively avoid the impact of high welding temperature on the performance of the structural adhesive.

[0050] The second stiffening rib 8 is welded and fixed to the steel plate 7. After the second stiffening rib 8 is welded, the steel plate 7 with the second stiffening rib 8 is laid on top of the reinforcing beam 3 and welded and fixed to the reinforcing beam 3.

[0051] After the steel plate 7 is welded and fixed, the steel reinforcement skeleton in the concrete surface layer 9 is tied above the steel plate 7. After the steel reinforcement skeleton is tied, fine stone concrete is poured and cured.

[0052] It is understandable that the steel reinforcement cage can be fixedly connected to the steel reinforcement in the existing frame column 1, or it can be fixedly connected to the steel plate 7 by welding. The specific installation method of the steel reinforcement cage can be selected according to actual needs, and no further restrictions are imposed here.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A support layer for retrofitting of existing buildings, comprising: Several reinforcing beams (3) are characterized in that the several reinforcing beams (3) are arranged transversely and longitudinally between adjacent existing frame columns (1), the reinforcing beams (3) are fixedly connected between the adjacent existing frame columns (1) and between the adjacent reinforcing beams (3), the reinforcing beams (3) are located above the existing floor slab (2), a steel plate (7) is fixedly arranged above the reinforcing beams (3), and a concrete surface layer (9) is poured on the steel plate (7).

2. The support layer for retrofitting of existing buildings according to claim 1, characterized in that, The reinforcing beams (3) are spaced apart from the existing floor slab (2).

3. The support layer for retrofitting of existing buildings according to claim 2, characterized in that, The spacing between the reinforcing beams (3) and the existing floor slab (2) is not less than 1.5 times the deflection of the reinforcing beams (3).

4. The support layer for retrofitting of existing buildings according to claim 1, characterized in that, The existing frame columns (1) are fixedly provided with connecting plates (4) on the outer walls, and the reinforcing beams (3) are fixedly connected with the connecting plates (4).

5. The support layer for retrofitting of existing buildings according to claim 4, characterized in that, The connecting plates (4) are wrapped on the outer walls of the existing frame columns (1), two oppositely arranged connecting plates (4) are fixedly connected through anchor bolts (6), the anchor bolts (6) pass through the existing frame columns (1), and the connecting plates (4) and the existing frame columns (1) are fixedly connected through structural adhesive bonding.

6. The support layer for retrofitting of existing buildings according to claim 5, characterized in that, The anchor bolts (6) are a tension structure.

7. The support layer for retrofitting of existing buildings according to claim 4, characterized in that, First stiffening ribs (5) are fixedly arranged between the connecting plates (4) and the reinforcing beams (3).

8. The support layer for retrofitting of existing buildings according to claim 1, characterized in that, Second stiffening ribs (8) are fixedly arranged at the bottom of the steel plate (7).

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