Component for additionally arranging hidden beam on independent foundation

Abstract

The utility model provides a component for additionally arranging a hidden beam on an independent foundation. The structure is composed of an independent foundation (3), annular hidden beams (1) and local hidden beams (2). Wherein the annular hidden beams (1) are anchored at four corners of the independent foundation (3), one ends of the local hidden beams (2) are connected with the independent foundation (3), and the other ends of the local hidden beams (2) are connected with the annular hidden beams (1); the number of the local hidden beams (2) is four, the upper ends of the local hidden beams (2) are anchored into the frame columns (7), stirrups at the bottoms of the frame columns (7) are anchored into the independent foundations (3), the lower ends of the local hidden beams (2) are anchored into the annular hidden beams (1), and the four local hidden beams (2) and the annular hidden beams (1) form a conical frame structure. The structure is simple in structure, convenient to construct and low in cost, the problem that the area of a single foundation is insufficient can be solved, and the problem that the area of reinforcing bars of the single foundation is insufficient after the height of the section of the single foundation is increased is also solved.

Description

Technical Field

[0001] The utility model relates to the field of infrastructure reinforcement, and in particular to a component used for adding hidden beams to an independent foundation. Background Art

[0002] With people's growing demand for a better life, the requirements for building functions are becoming more and more diversified. After the structural transformation, the foundation load has changed to varying degrees. For multi-story frame structures, the foundation type is usually an independent foundation, and the reinforcement of the independent foundation is single-layer and bidirectional. At the bottom of the foundation, when the load increases, the method of increasing the cross-section, the method of changing the single foundation to a strip foundation, and the method of changing the single foundation to a raft slab are generally used. However, the method of changing the single foundation to a strip foundation and the method of changing the single foundation to a raft slab are suitable for situations where the load increases greatly and the increase in the cross-section of the single foundation cannot meet the requirements; for situations where the increase in the load of some columns is not particularly large, the method of increasing the cross-section is usually used; however, the method of increasing the cross-section cannot change the configuration of the steel bars under the single foundation. After the cross-section is increased, the reinforcement area is significantly increased, and the actual situation is that the stress-bearing steel bar area of ​​the single foundation cannot be increased. Based on this, the utility model proposes a simple and effective component for changing the stress condition of the single foundation. Utility Model Content

[0003] The utility model aims to provide a component for adding a hidden beam to an independent foundation.

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model relates to a component for adding a hidden beam to an independent foundation, which consists of an independent foundation 3, an annular hidden beam 1 and a local hidden beam 2; wherein the annular hidden beam 1 is anchored at the four corners of the independent foundation 3, one end of the local hidden beam 2 is connected to the independent foundation 3, and the other end is connected to the annular hidden beam 1.

[0006] Preferably, the number of the local hidden beams 2 is four, the upper end of the local hidden beam 2 is anchored in the frame column 7, the stirrups at the bottom of the frame column 7 are anchored in the independent foundation 3, the lower end of the local hidden beam 2 is anchored in the annular hidden beam 1, and the four local hidden beams 2 and the annular hidden beam 1 form a conical frame structure.

[0007] Preferably, the first original independent foundation reinforcement 4 on the independent foundation 3 is welded to the steel bars of the independent foundation 3 .

[0008] Preferably, the welding includes single-sided welding and double-sided welding.

[0009] Preferably, the length of the single-sided welding is 10d, and the length of the double-sided welding is 5d.

[0010] Preferably, a column pier is provided at the root of the frame column 7.

[0011] Preferably, the cross-sectional width of the annular concealed beam 1 is not less than 200 mm.

[0012] Preferably, the area of ​​the annular concealed beam 1 is calculated using an equivalent reinforcement calculation method, and the algorithm formula is as follows:

[0013] 1000×h1×b1×0.15%×ξ=1000×h2×b2×0.15%+As1×2

[0014] Among them, As1=0.75(h1×b1ξ-h2×b2), ξ is the reinforcement increase coefficient, h1 is the section height after increase; h2 is the original section height; b1 is the equivalent section width after increase; b2 is the original equivalent section width.

[0015] Preferably, one end of the local hidden beam 2 is arranged at the four corners of the independent foundation 3 , and the other end thereof is connected to the frame column 7 .

[0016] Preferably, an interface agent or interface glue is applied on the new and old concrete joint surfaces between the original independent foundation 3 and the annular hidden beam 1 and the heightened foundation section to ensure reliable connection between the new and old concrete, and then the steel bars are tied. The first original independent foundation reinforcement 4 and the second original independent foundation reinforcement 6 of the independent foundation 3 are welded to the newly added extension steel bars 11 and then anchored into the annular hidden beam 1.

[0017] The utility model has the following advantages:

[0018] The utility model proposes a component for simply and effectively changing the stress condition of a single foundation, which is convenient to construct and low in cost, and can solve the problem of insufficient base surface area of ​​the single foundation and the problem of insufficient reinforcement area of ​​the single foundation after the height of the single foundation section is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of a component for adding a hidden beam to an independent foundation involved in the utility model;

[0020] Figure 2 It is a side view of a component for adding a hidden beam to an independent foundation involved in the utility model;

[0021] Figure 3 This is a construction effect display diagram of a component used for adding a hidden beam to an independent foundation involved in the utility model;

[0022] Markings in the attached drawings: 1 is the annular hidden beam, 2 is the local hidden beam, 3 is the independent foundation, 4 is the first original independent foundation reinforcement, 5 is the column reinforcement, 6 is the second original independent foundation reinforcement, 7 is the frame column, 8 is the foundation plain concrete cushion, 9 is the welding surface, 10 is the roughened surface, 11 is the newly added extension steel bar; 12 is the plain concrete cushion. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments are only further descriptions of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0024] Example

[0025] This embodiment relates to a component for adding a hidden beam to an independent foundation. Figure 1-Figure 3 As shown, it is composed of an independent foundation 3, an annular hidden beam 1 and a local hidden beam 2; wherein, the annular hidden beam 1 is anchored at the four corners of the independent foundation 3, one end of the local hidden beam 2 is connected to the independent foundation 3, and the other end is connected to the annular hidden beam 1.

[0026] There are four local hidden beams 2, the upper ends of the local hidden beams 2 are anchored in the frame columns 7, the stirrups at the bottom of the frame columns 7 are anchored in the independent foundation 3, and the lower ends of the local hidden beams 2 are anchored in the annular hidden beams 1. The four local hidden beams 2 and the annular hidden beams 1 form a conical frame structure.

[0027] The first original independent foundation reinforcement 4 on the independent foundation 3 is welded to the steel bars of the independent foundation 3 .

[0028] The welding includes single-sided welding and double-sided welding.

[0029] The length of the single-sided welding is 10d, and the length of the double-sided welding is 5d.

[0030] The root of the frame column 7 is provided with a column pier.

[0031] The cross-sectional width of the annular concealed beam 1 is not less than 200 mm.

[0032] One end of the local hidden beam 2 is arranged at the four corners of the independent foundation 3 , and the other end thereof is connected to the frame column 7 .

[0033] The interface agent or interface glue is applied on the new and old concrete joint surfaces of the original independent foundation 3, the annular hidden beam 1 and the heightened foundation section to ensure reliable connection between the new and old concrete, and then the steel bars are tied. The first original independent foundation reinforcement 4 and the second original independent foundation reinforcement 6 of the independent foundation 3 are welded to the newly added extension steel bars 11 and then anchored into the annular hidden beam 1.

[0034] A construction method for a component for adding a hidden beam to an independent foundation according to this embodiment includes the following steps:

[0035] Step 1: excavate to the bottom surface of the independent foundation 3 and process according to the condition of the independent foundation 3;

[0036] Step 2, roughening the upper surface and side surfaces of the independent foundation 3, the effect of which is shown in the roughened surface 10, opening the first original independent foundation reinforcement 4, extending the length of the steel bars of the independent foundation 3, and welding the connection method;

[0037] Step 3, expand the bottom surface of the cushion layer on the outside of the independent foundation 3, add an annular hidden beam 1, the cross-sectional width of the annular hidden beam 1 should not be less than 200mm, the annular hidden beam 1 is anchored at the four corners of the independent foundation 3, the anchorage length should be configured according to the tensile steel bar, the bottom reinforcement of the annular hidden beam 1 should be included in the area of ​​the independent foundation 3, the reinforcement of the annular hidden beam 1 should be calculated by finite element analysis, but it should meet the minimum reinforcement ratio requirements, the area of ​​the annular hidden beam 1 is calculated by the equivalent reinforcement calculation method, and the specific algorithm formula is as follows:

[0038] 1000×h1×b1×0.15%×ξ=1000×h2×b2×0.15%+As1×2

[0039] Among them, As1=0.75(h1×b1ξ-h2×b2), ξ is the reinforcement increase coefficient, h1 is the height of the section after increase; h2 is the original section height; b1 is the equivalent section width after increase; b2 is the original equivalent section width;

[0040] Step 4, add local hidden beams 2 at the upper part of the four corners of the independent foundation 3, the upper end of the local hidden beam 2 is anchored in the frame column 7, the bottom of the frame column 7 is reinforced with stirrups anchored in the independent foundation 3, and the lower end of the local hidden beam 2 is anchored in the annular hidden beam 1 to form a conical frame with the annular hidden beam 1; improve the overall force of the original independent foundation;

[0041] Step 5: Increase the cross-sectional height of the top surface of the independent foundation 3 and add column piers at the root of the frame column 7; the calculated height of the bottom column can be appropriately reduced, and the shear bearing capacity of the foundation can be improved;

[0042] Step 6, brushing interface agent or interface glue on the old and new concrete joint surfaces of the original independent foundation 3, the annular hidden beam 1 and the heightened foundation section height to ensure reliable connection between the new and old concrete, and then tying the steel bars, the first original independent foundation reinforcement 4 (arranged on the upper layer of the plain concrete cushion layer 12) and the second original independent foundation reinforcement 6 of the independent foundation 3 are welded with the newly added extension steel bars 11 and then anchored into the annular hidden beam 1, and then poured with concrete at least one strength grade higher than the original foundation;

[0043] Step 7, maintenance: The newly added concrete should be properly maintained, and the soil layer around the independent foundation 3 should be reasonably enclosed; the original foundation should not be severely damaged during maintenance, which will affect the uneven settlement of the foundation.

[0044] The method involved in the utility model is a simple and effective method for changing the stress condition of the single foundation. It is simple to construct and low in cost. It can solve the problem of insufficient base area of ​​the single foundation and the problem of insufficient reinforcement area of ​​the single foundation after the height of the single foundation section is increased.

[0045] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A component for adding a hidden beam to an independent foundation, characterized in that: It is composed of an independent foundation (3), an annular concealed beam (1) and a local concealed beam (2); wherein the annular concealed beam (1) is anchored at the four corners of the independent foundation (3), one end of the local concealed beam (2) is connected to the independent foundation (3), and the other end is connected to the annular concealed beam (1).

2. The component for adding hidden beams to an independent foundation according to claim 1, characterized in that: The number of the local hidden beams (2) is four, the upper ends of the local hidden beams (2) are anchored in the frame columns (7), the stirrups at the bottom of the frame columns (7) are anchored in the independent foundation (3), the lower ends of the local hidden beams (2) are anchored in the annular hidden beams (1), and the four local hidden beams (2) and the annular hidden beams (1) form a conical frame structure.

3. The component for adding hidden beams to an independent foundation according to claim 1, characterized in that: The first original independent foundation reinforcement (4) on the independent foundation (3) is welded and connected to the steel bars of the independent foundation (3).

4. The component for adding hidden beams to an independent foundation as claimed in claim 3, characterized in that: The welding includes single-sided welding and double-sided welding.

5. The component for adding hidden beams to an independent foundation as claimed in claim 4, characterized in that: The length of the single-sided welding is 10d, and the length of the double-sided welding is 5d.

6. The component for adding hidden beams to an independent foundation as claimed in claim 2, characterized in that: A column pier is arranged at the root of the frame column (7).

7. The component for adding hidden beams to an independent foundation as claimed in claim 1, characterized in that: The cross-sectional width of the annular concealed beam (1) is not less than 200 mm.

8. The component for adding hidden beams to an independent foundation as claimed in claim 1, characterized in that: One end of the local hidden beam (2) is arranged at the four corners of the independent foundation (3), and the other end is connected to the frame column (7).

9. The component for adding hidden beams to an independent foundation as claimed in claim 1, characterized in that: The first original independent foundation reinforcement (4) and the second original independent foundation reinforcement (6) of the independent foundation (3) are welded with the newly added extension steel bars (11) and then anchored into the annular concealed beam (1).

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