Reinforced concrete strip-shaped foundation section-enlarged reinforcing structure
By adding new flange and plain concrete cushion on the reinforced concrete strip foundation, combined with reinforced reinforcement technology, the problem of insufficient steel bar configuration in foundation reinforcement is solved, the foundation bearing capacity and structural stability are improved, and construction complexity and cost are reduced.
Patent Information
- Application Number
- CN202422294631.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, reinforced concrete strip foundations have limitations in the reinforcement process. Inadequate configuration of the original foundation flange steel bars leads to the structural stress after reinforcement. In addition, a large amount of demolition and reconstruction are required during the construction process, which affects safety and stability.
A new strip foundation wing flange is added to the top of the flange plate of the original reinforced concrete strip foundation, and a plain concrete cushion is set between its bottom and the base elevation of the original foundation. Combined with the addition of new flange steel bars, a continuous support plane is formed, and connected to the original structure through the planting technology to increase the foundation contact area and bending resistance.
It improves the foundation bearing capacity and foundation stability, reduces construction difficulty and cost, ensures the overall stability and safety of the structure, and meets the needs of higher bearing capacity.
Smart Images
Figure CN223227110U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of foundation reinforcement design and construction in civil engineering, and particularly relates to a reinforced concrete strip foundation with an enlarged cross-section reinforcement structure. Background Art
[0002] With the continuous improvement of my country's urbanization level, urban space is gradually becoming saturated. The number of new buildings has gradually stabilized, while the demand for reinforcement and renovation of old buildings has shown a rapid growth trend. In this context, building reinforcement design and construction technology are particularly important, especially foundation reinforcement, which is often the key and difficult part of reinforcement projects.
[0003] In existing building structures, reinforced concrete strip foundations are a common form of foundation. However, when this type of foundation needs to be reinforced, designers and engineers face a series of challenges. The traditional method of increasing the cross-section, that is, increasing the cross-sectional size of the concrete on the original foundation, is often used to improve the bearing capacity of the foundation. However, this approach has certain limitations; in many old buildings, the load-bearing steel bars of the original foundation flange are often small, and these steel bars may not meet the new load requirements after reinforcement. If the cross-section is simply increased without appropriate modifications to the original structure, the load transfer path may be unclear, affecting the overall performance of the structure. The conventional method of increasing the cross-section may require a lot of demolition and reconstruction work, which not only increases the difficulty of construction, but may also affect the safety and stability of surrounding buildings.
[0004] In view of this, we have solved the above problems by increasing the cross-section of the reinforced concrete strip foundation reinforcement structure, which can not only improve the bearing capacity of the foundation, but also enhance the overall bearing capacity of the foundation, ensuring the stability and safety of the structure when subjected to stress. Utility Model Content
[0005] The utility model aims to solve the technical problems that the cross-section enlargement method in the above-mentioned existing technology has limitations in reinforcing the foundation of old buildings, insufficient configuration of the original foundation flange steel bars may cause the force of the reinforced structure to fail to meet the requirements, and a large amount of demolition and reconstruction may be required during the construction process, affecting safety and stability.
[0006] To achieve the above purpose, the present invention provides the following technical solutions:
[0007] A reinforced concrete strip foundation with enlarged cross-section reinforcement structure, comprising:
[0008] The original reinforced concrete strip foundation is located above the bearing stratum;
[0009] Add a strip foundation flange, which is located on the top surface of the flange plate of the original reinforced concrete strip foundation;
[0010] Plain concrete cushion layer, which is located between the bottom of the newly added strip foundation flange and the bottom elevation of the original reinforced concrete strip foundation;
[0011] New flange reinforcement is added. The new flange reinforcement is located at the bottom elevation of the new strip foundation flange. The new flange reinforcement includes new flange tension reinforcement uniformly distributed transversely and new flange distribution reinforcement uniformly distributed longitudinally above the new flange tension reinforcement.
[0012] Preferably, the top of the original reinforced concrete strip foundation is provided with an original frame column.
[0013] Preferably, a temporary brick formwork is provided on the outer side of the newly added strip foundation flange and the plain concrete cushion layer.
[0014] Preferably, the outer side of the newly added strip foundation flange is backfilled with a foundation pit backfill layer.
[0015] Based on the above structure, the utility model describes its construction method as follows:
[0016] Step 1: Excavation of foundation pit: Determine the excavation range according to the specific reinforcement width, and remove the soil around the foundation part that needs to be reinforced to expose the original base;
[0017] Step 2: Planting reinforcement: Plant reinforcement at the original base elevation. Drill holes in the original foundation and plant new flange stress reinforcement and new flange distribution reinforcement. Then, perform plate-tying to connect the planted reinforcement with the original reinforcement mesh to form a new reinforcement mesh structure.
[0018] Step 3: Brick formwork construction: After the reinforcement and plate slabs are installed, brick formwork is constructed to provide formwork support for the newly added strip foundation flanges.
[0019] Step 4: Concrete pouring: Pour a plain concrete cushion to ensure sufficient support between the bottom of the new strip foundation flange and the original foundation bottom elevation; pour the new strip foundation flange concrete to form the new flange structure together with the plain concrete cushion;
[0020] Step 5. Acceptance: After the construction is completed, a quality inspection is carried out to ensure the stability and reliability of the new structure. After passing the inspection, the foundation pit is backfilled to restore the site to its original state.
[0021] In step one, care must be taken to protect the original foundation from damage during excavation; the brick formwork serves as a temporary formwork structure to support and fix the newly added strip foundation flange and plain concrete cushion during construction.
[0022] Compared with the prior art, the technical effects and advantages of the utility model are:
[0023] The reinforced concrete strip foundation has a larger cross-section and reinforced structure. New flanges are added to the top surface of the original reinforced concrete strip foundation flange plate and within the foundation beam to increase the contact area of the foundation, thereby effectively improving the bearing capacity and stability of the foundation. When the bearing capacity of the foundation is insufficient, the pressure on the bottom surface of the foundation can be reduced by expanding the foundation area to meet the demand for higher bearing capacity. The stress-bearing steel bars at the bottom of the new flange are determined according to the bearing capacity requirements of the foundation. The function of these steel bars is to enhance the bending resistance of the foundation. The connection between the embedded reinforcement method and the original foundation beam ensures a close integration of the old and new structures, allowing the new flange to work together with the original foundation to bear additional loads.
[0024] Plain concrete is poured simultaneously between the bottom of the new flange and the existing foundation level. This creates a continuous support surface, effectively transferring ground reaction forces throughout the foundation. The plain concrete cushion also fills the space between the existing foundation bottom and the new flange, reducing the risk of uneven settlement.
[0025] By increasing the foundation area, the new structure can disperse and reduce the pressure on the foundation, thereby improving the bearing capacity of the foundation. This is especially important in situations where the bearing capacity is insufficient due to weak foundation soil or uneven settlement. The flange plate of the original strip foundation may have insufficient bearing capacity due to small steel bar size or insufficient configuration. The implantation of new flange steel bars and the provision of distribution bars effectively increase the bending capacity of the flange plate, enabling it to bear greater loads. Anchor bar technology is a mature construction method that allows reinforcement on the original foundation without the need for large-scale demolition or reconstruction, which reduces construction difficulty and time. The stability and reliability of the new structure are ensured through quality acceptance, so that the reinforced foundation can safely bear the expected design load.
[0026] Therefore, the above solution can simultaneously solve the problem of the bearing capacity of the foundation and the strip foundation flange plate not meeting the requirements by increasing the foundation area, strengthening the steel bar configuration, optimizing the construction steps, and ensuring the effective combination of the new and old structures, thereby providing a more stable support for the building. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural diagram of the utility model;
[0028] Figure 2 This is the process of the present utility model.
[0029] In the figure: 1. Original reinforced concrete strip foundation; 2. Bearing layer; 3. Newly added strip foundation flange; 4. Plain concrete cushion layer; 5. Newly added flange tension reinforcement; 6. Newly added flange distribution reinforcement; 7. Original frame column; 8. Brick formwork; 9. Foundation pit backfill layer. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0031] The following is combined with Figure 1-2 To further explain this application,
[0032] The embodiment of the present application discloses a reinforced concrete strip foundation with an enlarged cross-section reinforcement structure, comprising an original reinforced concrete strip foundation 1, a newly added strip foundation flange 3, a plain concrete cushion layer 4, and newly added flange steel bars.
[0033] The original reinforced concrete strip foundation 1 is located above the bearing stratum 2. It is the load-bearing component of the building structure, responsible for receiving and transmitting the load of the superstructure to the foundation. Atop the original reinforced concrete strip foundation 1 are the original frame columns 7. These columns support the upper structure and, connected to the original reinforced concrete strip foundation 1, jointly bear the weight of the building. During the reinforcement process, it was crucial to ensure a stable and reliable connection between the original frame columns 7 and the newly added strip foundation flanges 3 to maintain the integrity of the entire structure.
[0034] The newly added strip foundation flange 3 is arranged on the top surface of the flange plate of the original reinforced concrete strip foundation 1; the newly added strip foundation flange 3 serves as an additional structural element, which improves its bearing capacity and stability by increasing the width of the foundation;
[0035] The plain concrete cushion layer 4 is located between the bottom of the newly added strip foundation flange 3 and the bottom elevation of the original reinforced concrete strip foundation 1; it is used to evenly transfer the foundation reaction force to avoid stress concentration;
[0036] The newly added flange reinforcement is located at the bottom elevation of the newly added strip foundation flange 3. The newly added flange reinforcement includes newly added flange stress-bearing reinforcement 5 uniformly distributed transversely and newly added flange distribution reinforcement 6 uniformly distributed longitudinally above the newly added flange stress-bearing reinforcement 5 to improve the bending bearing capacity of the foundation.
[0037] A temporary brick formwork 8 is provided outside the newly added strip foundation flange 3 and the plain concrete cushion 4. The design and construction of the brick formwork 8 should ensure its sufficient stability and rigidity to prevent deformation during concrete pouring.
[0038] The brick formwork 8 and the outer sides of the newly added strip foundation flange 3 are backfilled with a foundation pit backfill layer 9. After the reinforced structure is completed, the foundation pit is backfilled to restore the site to its original state. The backfill layer must meet relevant geotechnical standards, ensuring its density and stability to avoid adverse effects on the newly added structure and adjacent areas.
[0039] A method for reinforcing a reinforced concrete strip foundation by increasing its cross section comprises the following steps:
[0040] Step 1: Excavation of foundation pit: Determine the excavation range according to the specific reinforcement width, remove the soil around the foundation part that needs to be reinforced, and expose the original base. During the excavation process, pay attention to protecting the original foundation from damage;
[0041] Step 2: Planting reinforcement: Plant reinforcement at the original base elevation. Drill holes in the original foundation and plant new flange stress reinforcement 5 and new flange distribution reinforcement 6. Then, perform plate-tying to connect the planted reinforcement with the original reinforcement mesh to form a new reinforcement mesh structure.
[0042] Step 3, brick formwork 8 masonry: After the reinforcement and plate binding are completed, brick formwork 8 is built to provide formwork support for the newly added strip foundation flange 3; the brick formwork 8 serves as a temporary formwork structure to support and fix the newly added strip foundation flange 3 and the plain concrete cushion layer 4 during the construction process.
[0043] Step 4: Concrete pouring: pour a plain concrete cushion layer 4 to ensure sufficient support between the bottom of the newly added strip foundation flange 3 and the original foundation bottom elevation; pour concrete for the newly added strip foundation flange 3 to form a new flange structure together with the plain concrete cushion layer 4;
[0044] Step 5. Acceptance: After the construction is completed, a quality inspection is carried out to ensure the stability and reliability of the new structure. After passing the acceptance, the foundation pit is backfilled to restore the site to its original state.
[0045] In the present invention, the original reinforced concrete strip foundation 1 interacts with the frame columns. The original foundation acts as a load-bearing part, transferring the load of the superstructure to the foundation. The original frame columns 7 are connected to the foundation, jointly bearing the weight of the building. During the reinforcement process, by ensuring a stable connection between the original frame columns 7 and the newly added flanges, the integrity and collaborative working ability of the entire structure can be maintained. The newly added strip foundation flange 3 increases the foundation width, thereby improving the bearing capacity and stability of the foundation. It disperses the load of the superstructure by expanding the contact area of the foundation, reducing local pressure on the foundation. The function of the plain concrete cushion layer 4 is to evenly transfer the reaction force of the foundation, avoiding foundation damage or uneven settlement caused by stress concentration. It fills the space between the bottom surface of the original foundation and the newly added flange, providing a uniform support surface for the flange. The newly added flange load-bearing bars 5 and the newly added flange distribution bars 6 jointly improve the bending resistance of the foundation. The horizontally uniformly distributed load-bearing bars mainly bear shear forces, while the longitudinally uniformly distributed distribution bars help disperse and transfer loads, enhancing the structural performance of the entire flange. The brick formwork 8 serves as a temporary formwork, providing support and fixation during concrete pouring to prevent deformation. The foundation pit backfill layer 9 is used to restore the site to its original state after construction is completed, while ensuring the density and stability of the backfill to protect the newly added structure from external influences.
[0046] By increasing the foundation area, the foundation stress can be effectively reduced, the bearing capacity of the foundation can be improved, and the deformation and damage of the foundation can be prevented. The setting of the newly added flanges and steel bars improves the shear and bending resistance of the foundation, making the foundation more stable and better able to withstand the dynamic and static loads of the superstructure. The use of embedded reinforcement technology and brick formwork 8 makes the reinforcement project more convenient, reduces the construction difficulty and time, and ensures the construction quality. Compared with demolition and reconstruction, reinforcement projects usually have lower costs, so a lot of economic investment can be saved. Through quality acceptance, it is ensured that the reinforced structure can meet the design requirements, thereby ensuring the long-term safety and reliability of the building.
[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A reinforced concrete strip foundation with enlarged cross-section reinforcement structure, characterized in that: include: The original reinforced concrete strip foundation (1), the original reinforced concrete strip foundation (1) is located above the bearing layer (2); A new strip foundation flange (3) is added, and the new strip foundation flange (3) is arranged on the top surface of the flange plate of the original reinforced concrete strip foundation (1); A plain concrete cushion layer (4), the plain concrete cushion layer (4) is located between the bottom of the newly added strip foundation flange (3) and the bottom elevation of the original reinforced concrete strip foundation (1); New flange reinforcement is added, and the new flange reinforcement is located at the bottom elevation position of the new strip foundation flange (3). The new flange reinforcement includes new flange stress reinforcement (5) uniformly distributed in the transverse direction and new flange distribution reinforcement (6) uniformly distributed in the longitudinal direction above the new flange stress reinforcement (5).
2. The reinforced concrete strip foundation enlarged cross-section reinforcement structure according to claim 1, characterized in that: The top of the original reinforced concrete strip foundation (1) is provided with an original frame column (7).
3. The reinforced concrete strip foundation enlarged cross-section reinforcement structure according to claim 1, characterized in that: A temporary brick formwork (8) is provided on the outer sides of the newly added strip foundation flange (3) and the plain concrete cushion layer (4).
4. The reinforced concrete strip foundation enlarged cross-section reinforcement structure according to claim 3, characterized in that: The outer side of the newly added strip foundation flange (3) is backfilled with a foundation pit backfill layer (9).