Floor reconstruction and reinforcement structure based on original masonry bearing wall
By constructing concrete node blocks and angle steel connections at the load-bearing walls of old buildings, the problems of insufficient structure and large construction disturbance in existing floor slab reinforcement methods are solved, achieving efficient reinforcement of old buildings, improving the overall load-bearing capacity and maintaining aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-24
AI Technical Summary
Existing floor slab reinforcement methods for old buildings suffer from structural deficiencies, significant construction disturbances, limited space occupation, and limited load-bearing capacity improvement, thus failing to effectively enhance the overall structural load-bearing capacity of old buildings.
Concrete nodes are constructed at the connection points between the original load-bearing wall and the floor slab, and fixed to the original load-bearing wall using angle steel and bolt fasteners. The new floor slab is then firmly connected to the original load-bearing wall using angle steel and concrete nodes, thereby enhancing the connection strength and stability.
It improves the connection strength and stability between the new floor slab and the original load-bearing wall, enhances the overall load-bearing capacity of the old building, is easy to construct and does not occupy the building's net height, and uses simple materials and is economical in cost.
Smart Images
Figure CN224549720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a structure for the renovation of old buildings, and more particularly to a floor slab renovation and reinforcement structure based on the original masonry load-bearing wall. Background Technology
[0002] With the continuous development of urban renewal in my country, the reinforcement and renovation of old masonry structures is gradually increasing. Reliable and effective reinforcement methods are prerequisites for ensuring convenient and efficient construction and the safety of subsequent building use. For the reinforcement and renovation of masonry floor slabs, it is necessary to meet structural safety requirements, on-site construction feasibility, and the requirements of building comfort and aesthetics.
[0003] Currently, common methods for reinforcing masonry structure floor slabs include increasing the cross-section and bonding carbon fiber to the bottom of the slab. However, these methods have the following drawbacks: (1) Masonry structures were mostly built between the 1950s and 1990s, and the floor slabs are mostly precast hollow slabs. The concrete strength of the floor slabs is very low and carbonization is severe. The current condition is poor and they are not suitable for reinforcement or renovation. After reinforcement or renovation, they cannot meet the subsequent design service life. Reinforcement or renovation only improves the existing condition and does not solve the actual problems. (2) The floor slabs have undergone multiple renovations. Each time the original surface layer was not removed, the cumulative thickness of the surface layer of the floor slab is very large, reaching more than 200mm. When reinforcing or renovating, the surface layer needs to be removed. The vibration during the removal process is large and it greatly disturbs the original structure. (3) The method of increasing the cross-section for reinforcement occupies building space, thereby affecting the building's net height. The method of bonding carbon fiber for reinforcement requires regular maintenance and has limitations on the increase in load-bearing capacity.
[0004] In summary, the main problem at present is:
[0005] Currently, existing floor slab reinforcement methods have many defects and are not suitable for some old buildings. They have limited effect on improving the overall load-bearing capacity of old buildings. Summary of the Invention
[0006] The purpose of this utility model is to provide a floor slab renovation and reinforcement structure based on the original masonry load-bearing wall. This floor slab renovation and reinforcement structure enhances the strength and stability of the connection between the new floor slab and the original load-bearing wall, and improves the load-bearing capacity of the overall structure of the old building.
[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0008] A floor slab renovation and reinforcement structure based on the original masonry load-bearing wall includes the original load-bearing wall; the floor slab renovation and reinforcement structure also includes concrete node blocks constructed based on the original load-bearing wall, angle steel installed and connected based on the concrete node blocks, and a new floor slab constructed based on the angle steel.
[0009] Furthermore, the concrete node block has a side-protruding embedded configuration.
[0010] A floor slab renovation and reinforcement structure based on the original masonry load-bearing wall includes the original load-bearing wall; the floor slab renovation and reinforcement structure also includes multiple concrete node blocks and two sections of angle steel; the multiple concrete node blocks are constructed at the floor slab connection points of the original load-bearing wall, the two sections of angle steel are set on the two side walls of the original load-bearing wall, and the angle steel is fixedly connected to the concrete node blocks by bolt fasteners, and new floor slabs are constructed on both sides of the original load-bearing wall based on the angle steel.
[0011] Furthermore, the bolt fastener is a through-wall bolt, with two through-wall bolts configured for each concrete node block. The two through-wall bolts are pre-embedded in the concrete node block, and both ends of the through-wall bolts protrude from both sides of the concrete node block. The two ends of the through-wall bolts are fixed to the angle steel on both sides of the original load-bearing wall by nuts.
[0012] Furthermore, all the concrete node blocks are discretely distributed along the floor slab connection points of the original load-bearing walls.
[0013] Furthermore, the bottom reinforcing bars and angle steel of the internal steel reinforcement system of the newly built floor slab are fixedly connected together by welding.
[0014] Furthermore, the overall thickness of the newly constructed floor slab covers the bolt connections between the angle steel and the concrete node blocks.
[0015] Furthermore, the concrete node block has a side-protruding embedded configuration.
[0016] A floor slab renovation and reinforcement structure based on the original masonry load-bearing wall includes the original load-bearing wall, which is an exterior wall. The floor slab renovation and reinforcement structure also includes multiple concrete node blocks, angle steel, and steel plates. The multiple concrete node blocks are constructed at the floor slab connection points of the original load-bearing wall. Each concrete node block is equipped with a through-wall bolt, which is pre-embedded in the concrete node block. Both ends of the through-wall bolt protrude from both sides of the concrete node block. The angle steel is set on the inner wall surface of the original load-bearing wall, and the steel plate is set on the outer wall surface of the original load-bearing wall. The end of the through-wall bolt on the inner wall surface of the original load-bearing wall is fixed to the angle steel with a nut, and the end of the through-wall bolt on the outer wall surface of the original load-bearing wall is fixed to the steel plate with a nut. A new floor slab is constructed on one side of the inner wall surface of the original load-bearing wall based on the angle steel.
[0017] Furthermore, the concrete node block has a side-protruding embedded configuration.
[0018] Compared with existing technologies, the main advantages of this utility model's floor slab renovation and reinforcement structure based on the original masonry load-bearing wall are as follows:
[0019] Concrete nodes are constructed at the connection points of the original load-bearing walls and floor slabs, and angle steel is installed based on the concrete nodes. The newly constructed floor slabs are then firmly connected to the original load-bearing walls through the angle steel and concrete nodes, which enhances the strength and stability of the connection between the new floor slabs and the original load-bearing walls. This allows for the re-casting of structural floor slabs and improves the overall load-bearing capacity of the old building structure. Attached Figure Description
[0020] Figure 1 This is a first schematic diagram of the floor slab modification and reinforcement structure based on Embodiment 1 of this utility model. The diagram is a view facing the wall.
[0021] Figure 2 This is a second schematic diagram of the floor slab modification and reinforcement structure based on Embodiment 1 of this utility model. The diagram is a cross-sectional view of the wall.
[0022] Figure 3 This is a first schematic diagram of the floor slab modification and reinforcement structure based on Embodiment 2 of this utility model. The diagram is a cross-sectional view of the wall. Detailed Implementation
[0023] The specific embodiments of this utility model are further described below:
[0024] Implementation method 1:
[0025] See Figure 1 and Figure 2 This embodiment 1 provides a floor slab renovation and reinforcement structure based on the original masonry load-bearing wall. The main innovation of this floor slab renovation and reinforcement structure is that multiple concrete node blocks 2 are constructed at the floor slab connection points of the original load-bearing wall 1, and angle steel 3 is installed based on these concrete node blocks 2. The newly poured floor slab 5 is firmly connected to the original load-bearing wall 1 through the angle steel 3 and the concrete node blocks 2, thereby enhancing the strength and stability of the connection between the new floor slab 5 and the original load-bearing wall 1.
[0026] It should be noted that the original load-bearing wall 1 mentioned in this embodiment 1 is a masonry structure load-bearing wall.
[0027] Specifically
[0028] The floor slab modification and reinforcement structure of this embodiment 1 is based on the original load-bearing wall 1.
[0029] Multiple concrete node blocks 2 are constructed at the floor slab connection points of the original load-bearing wall 1. All concrete node blocks 2 are distributed discretely along the floor slab connection points of the original load-bearing wall 1, that is, the concrete node blocks 2 are arranged at intervals.
[0030] Angle steel 3 is installed on both sides of the original load-bearing wall 1, and then bolts are used to fix the angle steel 3 to each concrete node block 2. Specifically, in this embodiment, the bolts are through-wall bolts 4. Two through-wall bolts 4 are configured for each concrete node block 2. The two through-wall bolts 4 are pre-embedded in the concrete node block 2, and both through-wall bolts 4 penetrate both sides of the wall surface of the concrete node block 2. Both ends of the through-wall bolts 4 protrude from both sides of the concrete node block 2. The two ends of the through-wall bolts 4 are fixed to the angle steel 3 on both sides of the original load-bearing wall 1 by nuts. In this way, the angle steel 3 on both sides of the original load-bearing wall 1 is anchored to the original load-bearing wall 1 based on the concrete node block 2. One flange of the angle steel 3 is on the upper side, which is fixedly connected to the concrete node block 2 by the through-wall bolts 4, and the other flange of the angle steel 3 is on the lower side, protruding from the wall surface of the original load-bearing wall 1.
[0031] New floor slabs 5 are constructed on both sides of the original load-bearing wall 1. The new floor slabs 5 are reinforced concrete floor slabs.
[0032] The internal steel reinforcement system 7 of the newly built floor slab 5 is composed of three parts: bottom reinforcing bars 71, top reinforcing bars 72, and distribution reinforcing bars 73.
[0033] The newly constructed floor slabs 5 on both sides of the original load-bearing wall 1 are based on the angle steel 3 on both sides of the original load-bearing wall 1. The internal steel reinforcement system 7 of the newly constructed floor slab 5 is fixedly connected to the "flange of the angle steel 3 protruding from the wall surface of the original load-bearing wall 1" by welding. Specifically, the bottom reinforcing steel 71 of the internal steel reinforcement system 7 of the newly constructed floor slab 5 is welded to the angle steel 3.
[0034] The overall thickness of the newly built floor slab 5 covers the bolt connection between the angle steel 3 and the concrete node block 2. In other words, both ends of the through-wall bolt 4 protruding from the concrete node block 2 are covered by the overall thickness of the newly built floor slab 5, so the bolt connection is not visible from the outside, thus enhancing the aesthetics.
[0035] It should be noted that the concrete node block 2 has a rather special configuration. It has protrusions on both sides of the original load-bearing wall 1 (as indicated by arrow A in the figure). These protrusions are embedded in the original load-bearing wall 1, thus allowing the concrete node block 2 to be firmly bonded to the original load-bearing wall 1. For ease of description, this configuration of the concrete node block 2 is defined as the "side-protrusion embedded configuration".
[0036] The following describes the specific construction method and process for floor slab renovation and reinforcement:
[0037] 1) Cut off the original floor slab along the original load-bearing wall 1, and make openings at intervals at the original load-bearing wall 1 floor slab elevation;
[0038] 2) Fill the openings in the original load-bearing wall 1 with fine aggregate concrete to form concrete node blocks 2, and at the same time embed two through-wall bolts 4 in each opening.
[0039] 3) After the concrete strength grade of concrete node block 2 reaches the design requirements, use nuts that match the through-wall bolt 4 to fix one end flange of angle steel 3 to the side of concrete node block 2, and then tighten and weld the nuts.
[0040] 4) Five formwork supports were erected for the new floor slab. The reinforcing bars 72 on the slab surface were bent at angle steel 3, and the reinforcing bars 71 on the bottom of the slab were welded to the lower flange of angle steel 3.
[0041] 5) Pour concrete for the new floor slab 5, and make a new load-bearing wall surface layer to cover the nuts that match the through-wall bolts 4 and the fixing flanges of the angle steel 3.
[0042] It should be noted that,
[0043] The concrete node block 2 is made of fine aggregate concrete and is cast in place, which enhances the strength of the connection between the node and the original load-bearing wall 1 and the stability of the structure.
[0044] Two through-wall bolts 4 are pre-embedded in each concrete node block 2, which significantly improves the shear bearing capacity of the node and ensures the reliability of the node;
[0045] Angle steel 3 is made of hot-rolled equilateral angle steel of corresponding length on the edge of the plate. It is fixed to the side of the concrete node block 2 with nuts that match the through-wall bolts 4. The nuts are tightened and welded. The angle steel and nuts are embedded in the surface layer of the new floor slab 5 and the original load-bearing wall 1. The angle steel is welded to the bottom reinforcing steel bar 71 of the slab, which improves the convenience of construction and the aesthetics of the structure.
[0046] The newly constructed floor slab 5 is made of cast-in-place concrete, which is convenient for construction.
[0047] The main advantages of the floor slab modification and reinforcement structure in this embodiment are:
[0048] 1) Concrete node block 2 is constructed at the floor slab connection of the original load-bearing wall 1, and angle steel 3 is set based on the concrete node block 2. The newly constructed floor slab 5 is firmly connected to the original load-bearing wall 1 through the angle steel 3 and the concrete node block 2, which enhances the strength and stability of the connection between the new floor slab 5 and the original load-bearing wall 1. The structural floor slab can be recast in place, which improves the load-bearing capacity of the overall structure of the old building.
[0049] The floor slab modification and reinforcement structure of this embodiment also has some other advantages, as follows:
[0050] 2) The floor slab modification and reinforcement structure of this embodiment can solve the problem of insufficient slab thickness or insufficient bottom reinforcement, and does not require increasing the cross section of the original floor slab surface, thereby increasing the net floor height and providing conditions for optimizing the building scheme.
[0051] 3) The floor slab renovation and reinforcement structure in this embodiment adopts the method of opening holes in the masonry load-bearing wall, filling them with fine stone concrete, pre-embedding through bolts, fixing the angle steel with bolts, bending the top reinforcement of the new floor slab, and welding the bottom reinforcement to the angle steel, which is convenient and efficient to construct.
[0052] 4) The floor slab renovation and reinforcement structure in this embodiment uses only fine stone concrete, through bolts and angle steel. The angle steel is embedded in the concrete slab and load-bearing wall surface layer. Therefore, the materials are simple, the cost is economical and the enclosure cost is low.
[0053] In summary, the floor slab renovation and reinforcement structure of this embodiment has strong feasibility, economy and applicability.
[0054] Implementation Method 2:
[0055] See Figure 3 This embodiment 2 provides a floor slab modification and reinforcement structure based on the original masonry load-bearing wall. The concept of this floor slab modification and reinforcement structure is roughly the same as that of the floor slab modification and reinforcement structure provided in embodiment 1, the difference being:
[0056] In this embodiment 2, the original load-bearing wall 1 is an exterior wall, and there is no floor slab on its outer side. In this case,
[0057] A steel plate 9 is installed on the outer wall surface of the original load-bearing wall 1 to replace the angle steel 3, and is connected to the through-wall bolt 4 to ensure that the angle steel 3 on the inner side of the original load-bearing wall 1 has a strong foundation, so that it can be firmly combined with the concrete node block 2.
[0058] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.
Claims
1. A floor slab renovation and reinforcement structure based on the original masonry load-bearing wall, including the original load-bearing wall (1); Its features are: The floor slab renovation and reinforcement structure also includes Concrete node blocks (2) are constructed based on the original load-bearing wall (1). Angle steel (3) is installed and connected based on concrete node blocks (2). as well as New floor slab (5) constructed based on angle steel (3).
2. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall as described in claim 1, characterized in that: The concrete node block (2) has a side-protruding embedded configuration.
3. A floor slab renovation and reinforcement structure based on the original masonry load-bearing wall, including the original load-bearing wall (1); Its features are: The floor slab renovation and reinforcement structure also includes multiple concrete node blocks (2) and two sections of angle steel (3); The multiple concrete node blocks (2) are constructed at the floor slab connection points of the original load-bearing wall (1). The two angle steel sections (3) are set on both sides of the original load-bearing wall (1), and the angle steel sections (3) are fixedly connected to the concrete node block (2) by bolt fasteners. New floor slabs (5) are constructed on both sides of the original load-bearing wall (1) based on angle steel (3).
4. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall as described in claim 3, characterized in that: The bolt fastener is a through-wall bolt (4). Two through-wall bolts (4) are configured for each concrete node block (2). The two through-wall bolts (4) are embedded in the concrete node block (2). Both ends of the through-wall bolts (4) protrude from both sides of the concrete node block (2). The two ends of the through-wall bolts (4) are fixed to the angle steel (3) on both sides of the original load-bearing wall (1) by nuts.
5. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall as described in claim 3, characterized in that: All concrete node blocks (2) are discretely distributed along the floor slab connection points of the original load-bearing wall (1).
6. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall as described in claim 3, characterized in that: The bottom reinforcing bars (71) of the internal steel reinforcement system (7) of the newly built floor slab (5) are fixedly connected to the angle steel (3) by welding.
7. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall as described in claim 3, characterized in that: The overall thickness of the newly built floor slab (5) is buried above the bolt connection between the angle steel (3) and the concrete node block (2).
8. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall as described in claim 3, characterized in that: The concrete node block (2) has a side-protruding embedded configuration.
9. A floor slab renovation and reinforcement structure based on the original masonry load-bearing wall, including the original load-bearing wall (1), wherein the original load-bearing wall (1) is an external wall; Its features are: The floor slab renovation and reinforcement structure also includes multiple concrete node blocks (2), angle steel (3) and steel plates (9); The multiple concrete node blocks (2) are constructed at the floor slab connection points of the original load-bearing wall (1). Each concrete node block (2) is equipped with a through-wall bolt (4), which is pre-embedded in the concrete node block (2), with both ends of the through-wall bolt (4) protruding from both sides of the concrete node block (2). The angle steel (3) is set on the inner wall surface of the original load-bearing wall (1). The steel plate (9) is set on the outer wall surface of the original load-bearing wall (1). The end of the through-wall bolt (4) located on the inner wall surface of the original load-bearing wall (1) is fixed to the angle steel (3) with a nut. The end of the through-wall bolt (4) located on the outer wall surface of the original load-bearing wall (1) is fixed to the steel plate (9) by a nut. A new floor slab (5) is constructed on one side of the inner wall of the original load-bearing wall (1) based on angle steel (3).
10. The floor slab renovation and reinforcement structure based on the original masonry load-bearing wall according to claim 9, characterized in that: The concrete node block (2) has a side-protruding embedded configuration.