A green connecting and reinforcing structure of a newly added concrete floor and an existing masonry load-bearing wall
By using concrete pins, steel sections, and connecting components in the masonry structure, the problem of stable connection between the newly added concrete floor slab and the existing masonry load-bearing wall was solved, achieving high-efficiency connection strength and stability, and avoiding wall cracking and collapse.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU ZHONGGU BUILDING SCI & TECH CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, the grooves at the top of the newly added L-shaped side beams, which are embedded deeper into the existing wall, are quite deep, leading to problems such as wall cracking and overall collapse.
Concrete pins, steel sections, and connecting components, including tie rods, steel plates, and nuts, are used. Concrete pins are installed at 1m intervals to enhance the connection strength, and high-ductility concrete and wall reinforcement bars are used to ensure a stable connection.
It effectively improves the connection strength and stability between the newly added concrete floor slab and the existing masonry load-bearing wall, avoids wall cracking and overall collapse caused by excessive groove depth, and ensures uniform load transfer.
Smart Images
Figure CN224495908U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building structure technology, specifically a green connection and reinforcement structure between a newly added concrete floor slab and an existing masonry load-bearing wall. Background Technology
[0002] In my country, brick masonry structures remain the primary structural form for low-rise and multi-story buildings. Many of these masonry structures have wooden floor slabs, which must be removed due to age and disrepair. However, the load-bearing masonry walls are often well-preserved and can be reinforced for reuse. When replacing wooden floor slabs with new concrete floor slabs, it is essential to ensure an effective connection between the new slabs and the existing load-bearing masonry walls.
[0003] For example, announcement number CN208152611U, entitled "A Reinforcement Structure for Concrete Frame Edge Beams of Old Buildings," includes existing walls, a newly added ring beam, a steel mesh, a plastered wall surface, and a cast-in-place floor slab. The existing walls are the original masonry wall structure of the building. The newly added ring beam is an L-shaped concrete structure built inside the connection between the existing walls of two floors, embedded to a certain depth within the existing wall, with a protrusion at the top that further embeds into the existing wall. The steel mesh is a steel frame structure set inside the newly added ring beam. The plastered wall surface is a cement mortar wall surface laid on the existing walls and the newly added ring beam. The cast-in-place floor slab is a floor slab structure built on the side of the newly added ring beam and extending inwards, flush with the top surface of the newly added ring beam. This structure can improve the load-bearing capacity and seismic resistance of old buildings, and is simple in structure and easy to construct.
[0004] The aforementioned newly added ring beam is an L-shaped concrete structure built inside the connection between the existing walls of the two floors. This new ring beam is embedded to a certain depth within the existing wall, and its top protrudes further into the wall. This method involves significant and continuous grooving, which could lead to wall cracking and eventual collapse. Therefore, it does not meet the current requirements. To address this, a green connection and reinforcement structure between the new concrete floor slab and the existing masonry load-bearing wall is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall, so as to solve the problem mentioned in the background art that the newly added L-shaped side beam has a protrusion at the top and is embedded deeper into the existing wall, with a large groove depth and continuous groove, which will cause the wall to crack and collapse.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a green connection and reinforcement structure between a newly added concrete floor slab and an existing masonry load-bearing wall, comprising: the original masonry load-bearing wall, steel profiles, connecting components, and concrete pins; a concrete pin is provided on the inner side of one end of the original masonry load-bearing wall, a steel profile is provided on the left side of the concrete pin, and one end of the steel profile extends into the concrete pin; multiple sets of connecting components are provided inside the original masonry load-bearing wall, one end of the connecting components is connected to the concrete pin, and the other end extends through to the other end of the original masonry load-bearing wall; a new ring beam is provided at one end of the steel profile, and a new concrete floor slab is provided on the inner side of the new ring beam.
[0007] Preferably, the inner side of the original masonry load-bearing wall is provided with multiple sets of tie bars extending into the original masonry load-bearing wall.
[0008] Preferably, the tie bars exposed to the outside of the original masonry structure load-bearing wall are provided with high-ductility concrete.
[0009] Preferably, the connecting assembly includes a tie rod that passes through a concrete key.
[0010] Preferably, the end of the tie rod is provided with a steel pad, and the lower end of the steel pad is provided with a nut.
[0011] Preferably, an installation groove is provided on the inner side of the other end of the original masonry load-bearing wall, and the steel pad and nut are both located in the installation groove, and the inside of the installation groove is smoothed with cement mortar.
[0012] Preferably, the original masonry load-bearing wall has multiple holes for connecting components to pass through, and the holes are filled with grout.
[0013] Preferably, the concrete key comprises a plurality of concrete key main reinforcement bars and concrete key stirrups.
[0014] Preferably, the newly added ring beam has multiple newly added beam stirrups inside, and the newly added beam stirrups have multiple newly added beam main bars inside.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] (1) In this utility model, based on the original masonry structure load-bearing wall and concrete pin, the connection strength between the concrete pin and the wall is enhanced by setting steel and connecting components. The connecting components include tie rods, steel pads and nuts. Multiple tie rods penetrate the concrete pin 4, which can effectively ensure that the tie rods and concrete beams share the force and effectively improve their force transmission effect. The steel pads and nuts limit and reinforce the tie rods, improving their own stability. The concrete pins are set at 1m intervals and the wall embedment depth is only 100mm, which solves the problem that the newly added L-shaped side beam has a protrusion at the top and is embedded deeper into the existing wall, the groove depth is large, and the continuous groove will cause the wall to crack and collapse.
[0017] (2) In this utility model, the setting of high ductility concrete and wall reinforcement steel bars increases the bearing capacity of the original masonry structure load-bearing wall. The setting of multiple sets of tie bars ensures the reliable connection between the high ductility concrete and the original masonry structure load-bearing wall.
[0018] (3) In this utility model, the holes facilitate the connection components to penetrate the original masonry structure load-bearing wall. The installation groove allows the user to install the corresponding tie rod at the location. After installation, the holes are filled with grout and the installation groove is smoothed with cement mortar, which can effectively improve the density at the above location, making the whole structure more stable and solid, and ensuring that the load on the beam is evenly transferred to the existing load-bearing wall. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of node A structure of this utility model;
[0021] Figure 3 This is a 1-1 cross-sectional view of the present invention;
[0022] Figure 4 This is a 2-2 cross-sectional view of the present invention;
[0023] In the diagram: 1. Original masonry load-bearing wall; 2. Steel section; 3. Connecting components; 301. Tie rod; 302. Steel pad; 303. Nut; 4. Concrete key; 401. Concrete key stirrup; 402. Concrete key main reinforcement; 5. Hole; 6. Installation groove; 7. Tie bar; 8. High ductility concrete; 801. Horizontal reinforcement for wall reinforcement; 802. Vertical reinforcement for wall reinforcement; 9. New ring beam; 901. New beam stirrup; 902. New beam main reinforcement; 10. New concrete floor slab. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0025] Please see Figures 1-4 This utility model provides an embodiment of a green connection and reinforcement structure between a newly added concrete floor slab and an existing masonry load-bearing wall, comprising: the original masonry load-bearing wall 1, steel profile 2, connecting components 3, and concrete pins 4; a concrete pin 4 is provided in a groove on the inner side of one end of the original masonry load-bearing wall 1, a steel profile 2 is provided on the left side of the concrete pin 4, and one end of the steel profile 2 extends into the concrete pin 4; multiple sets of connecting components 3 are provided inside the original masonry load-bearing wall 1, one end of the connecting component 3 is connected to the concrete pin 4, and the other end extends through to the other end of the original masonry load-bearing wall 1; the connecting component 3 includes a tie rod 301, a steel pad 302 is provided at the end of the tie rod 301, and a nut 303 is provided at the lower end of the steel pad 302; the concrete pin 4 is composed of several concrete pin main reinforcement bars 402 and concrete pin stirrups 401. Concrete pins 4 are arranged at 1m intervals along the length of the wall. The holes are made using the skip-pour method, and the original masonry load-bearing wall 1 is supported. The concrete pins 4 are poured with grout.
[0026] Based on the original masonry load-bearing wall 1 and concrete key 4, the connection strength between the concrete key 4 and the wall is enhanced by setting steel section 2 and connecting component 3. The connecting component 3 includes tie rod 301, steel pad 302 and nut 303. Multiple tie rods 301 penetrate the concrete key 4, which can effectively ensure that the tie rod 301 and the concrete beam share the load, and can effectively improve its force transmission effect. The steel pad 302 and nut 303 limit and reinforce the tie rod 301, and improve its own stability.
[0027] Furthermore, such as Figure 2 As shown, the inner side of the original masonry load-bearing wall 1 is provided with multiple sets of tie bars 7 extending into the original masonry load-bearing wall 1. The tie bars 7 are exposed to the outside of the original masonry load-bearing wall 1 and are provided with high-ductility concrete 8. The interior of the high-ductility concrete 8 is provided with wall reinforcement horizontal steel bars 801 and wall reinforcement vertical steel bars 802.
[0028] The load-bearing capacity of the original masonry load-bearing wall 1 was increased by the installation of high-ductility concrete 8 and the horizontal and vertical reinforcing bars 801 and 802. The reliable connection between the high-ductility concrete 8 and the original masonry load-bearing wall 1 was ensured by the installation of multiple sets of tie bars 7.
[0029] Please see Figure 2An installation groove 6 is provided on the inner side of the other end of the original masonry load-bearing wall 1. The steel pad 302 and the nut 303 are both located in the installation groove 6. The inside of the installation groove 6 is smoothed with cement mortar. The inside of the original masonry load-bearing wall 1 has multiple holes 5 for the connecting components 3 to pass through. The inside of the holes 5 is filled with grout.
[0030] The hole 5 allows the connecting component 3 to pass through the original masonry load-bearing wall 1. The installation groove 6 allows the user to install the corresponding tie rod 301 at this location. After installation, grout is filled into the hole 5 and smoothed with cement mortar in the installation groove 6. This effectively improves the density at the above location, making the whole structure more stable and solid, and ensuring that the load on the beam is evenly transferred to the existing load-bearing wall.
[0031] Please see Figure 1 , Figure 2 A new ring beam 9 is provided at one end of the steel section 2. A new concrete floor slab 10 is provided on the inner side of the new ring beam 9. Multiple new beam stirrups 901 are provided inside the new ring beam 9, and multiple new beam main bars 902 are provided inside the new beam stirrups 901. The strength of the new ring beam 9 is effectively improved by the setting of multiple new beam stirrups 901 and new beam main bars 902.
[0032] The construction process in this embodiment is as follows:
[0033] Step 1: Support the original masonry load-bearing wall 1; Step 2: Remove the wooden floorboards; Step 3: Use static cutting to create a hole for the concrete dowel key 4 inside the original masonry load-bearing wall 1 using a skip-layer method; Step 4: Drill holes 5 along the brick joints on the outside of the original masonry load-bearing wall 1, connecting with the hole for the concrete dowel key 4; Step 5: Create an installation groove 6; Step 6: Pre-tie the concrete dowel key stirrups 401 and the main reinforcement 402; Step 7: Install a stirrup inside the concrete dowel key 4 for positioning the concrete dowel key stirrups 401, the main reinforcement 402, and the steel section 2; Step 8: Concrete... Step 9: Place the tied concrete dowel stirrups 401 and main concrete dowel reinforcement 402 inside the dowel 4 opening; Step 10: Install the steel section 2; Step 11: Install the tie rod 301, steel pad 302 and nut 303; Step 12: Formwork for the new ring beam 9 and the new concrete floor slab 10; Step 13: Tie the reinforcement of the new ring beam 9 and the new concrete floor slab 10; Step 14: Pour grout into the concrete dowel 4 opening and the tie rod 301 hole 5; Step 15: Pour concrete into the new concrete floor slab 10 and the new ring beam 9; Step 16: Smooth the installation groove 6 with cement mortar.
[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A green connection and reinforcement structure between a newly added concrete floor slab and an existing masonry load-bearing wall, comprising the original masonry load-bearing wall (1), steel profiles (2), connecting components (3), and concrete keyways (4); characterized in that: A concrete pin (4) is provided on the inner side of one end of the original masonry load-bearing wall (1). A steel section (2) is provided on the left side of the concrete pin (4), and one end of the steel section (2) extends into the concrete pin (4). Multiple sets of connecting components (3) are provided inside the original masonry load-bearing wall (1). One end of the connecting component (3) is connected to the concrete pin (4), and the other end extends through to the other end of the original masonry load-bearing wall (1). A new ring beam (9) is provided at one end of the steel section (2), and a new concrete floor slab (10) is provided on the inner side of the new ring beam (9).
2. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall as described in claim 1, characterized in that: The inner side of the original masonry load-bearing wall (1) is provided with multiple sets of tie bars (7) extending into the original masonry load-bearing wall (1).
3. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall as described in claim 2, characterized in that: The tie bar (7) is exposed to the outside of the original masonry structure load-bearing wall (1) and is provided with high ductility concrete (8).
4. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall as described in claim 1, characterized in that: The connecting assembly (3) includes a tie rod (301) that passes through a concrete key (4).
5. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall as described in claim 4, characterized in that: The end of the tie rod (301) is provided with a steel pad (302), and the lower end of the steel pad (302) is provided with a nut (303).
6. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall according to claim 5, characterized in that: An installation groove (6) is provided on the inner side of the other end of the original masonry load-bearing wall (1). The steel pad (302) and the nut (303) are both located in the installation groove (6). The interior of the installation groove (6) is smoothed with cement mortar.
7. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall according to claim 1, characterized in that: The original masonry load-bearing wall (1) has multiple holes (5) for the connecting components (3) to pass through, and the holes (5) are filled with grout.
8. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall according to claim 1, characterized in that: The concrete key (4) consists of several concrete key main bars (402) and concrete key stirrups (401).
9. The green connection and reinforcement structure between the newly added concrete floor slab and the existing masonry load-bearing wall according to claim 1, characterized in that: The newly added ring beam (9) is provided with multiple new beam stirrups (901) inside, and multiple new beam main bars (902) are provided inside the new beam stirrups (901).