Top column enlarged section structure

Abstract

The utility model discloses an enlarged section structure of a top layer column. The enlarged section structure comprises angle ribs, longitudinal ribs, stirrups and newly-added concrete, one end of each angle rib is implanted into the top of the top column, the other end of each angle rib extends to the outside of the top column, and the angle ribs are arranged in the circumferential direction of the top of the top column; the upper ends of the longitudinal bars are in lap joint with the other ends of the angle bars respectively, so that the longitudinal bars are circumferentially arranged on the outer side of the top layer column, the stirrups are bound on the longitudinal bars, and the stirrups are arranged at intervals in the axial direction of the longitudinal bars; the newly-added concrete is poured on the outer side of the top layer column and wraps the longitudinal bars and the stirrups to form a top layer column enlarged section structure, the top layer column enlarged section structure and the top layer column are connected into a whole, and the top of the top layer column enlarged section structure is connected to the bottom face of the top plate. The utility model relates to the technical field of building construction, and can solve the problem of difficulty in top layer column section enlarging construction in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a structure for increasing the cross-section of a top-floor column. Background Art

[0002] For the traditional frame column structure with increased cross-section, the method of adding longitudinal bars through the floor slab as a whole is adopted. However, when it comes to the top-floor column, since the top of the top-floor column is the roof structure, if the newly added longitudinal bars penetrate through the roof slab or are implanted into the roof slab by post-inserting bars, it may cause cracking and leakage of the roof slab, resulting in difficulties in the construction of increasing the cross-section of the top-floor column. Therefore, it is necessary to provide a structure for increasing the cross-section of a top-floor column, which can solve the problem of difficult construction of increasing the cross-section of the top-floor column in the prior art. Summary of the Invention

[0003] The purpose of the utility model is to provide a structure for increasing the cross-section of a top-floor column, which can solve the problem of difficult construction of increasing the cross-section of the top-floor column in the prior art.

[0004] The utility model is realized as follows:

[0005] A structure for increasing the cross-section of a top-floor column includes corner bars, longitudinal bars, stirrups and newly added concrete; one end of the corner bar is implanted into the top of the top-floor column, and the other end of the corner bar extends to the outside of the top-floor column, and the corner bars are arranged circumferentially along the top of the top-floor column; the upper ends of several longitudinal bars are respectively lapped on the other end of the corner bar, so that several longitudinal bars are arranged circumferentially on the outside of the top-floor column, the stirrups are tied on several longitudinal bars, and several stirrups are arranged at intervals along the axial direction of the longitudinal bars; the newly added concrete is poured on the outside of the top-floor column and wraps the longitudinal bars and stirrups to form a structure for increasing the cross-section of the top-floor column, and the structure for increasing the cross-section of the top-floor column is connected with the top-floor column as a whole, and the top of the structure for increasing the cross-section of the top-floor column is connected to the bottom surface of the roof slab.

[0006] The cross-section of the corner bar is an inverted L-shaped structure, one end of the horizontal section of the corner bar is implanted into the top-floor column, and the other end of the horizontal section of the corner bar extends to the outside of the top-floor column, so that the vertical section of the corner bar is arranged on the outside of the top-floor column.

[0007] The horizontal section of the corner bar is arranged parallel to the bottom of the roof slab, and the implantation depth of the horizontal section of the corner bar into the top-floor column is not less than 15 times the thickness of the horizontal section of the corner bar.

[0008] The vertical section of the corner bar is lapped with the longitudinal bar, and the lap length of the vertical section of the corner bar and the longitudinal bar is not less than 10 times the diameter of the longitudinal bar.

[0009] When the stirrup encounters the existing beam body, the stirrup penetrates through the beam body to connect the structure for increasing the cross-section of the top-floor column and the beam body as a whole.

[0010] The stirrups described above include conventional-spacing stirrups and closely spaced stirrups, and the bar spacing of the closely spaced stirrups is smaller than that of the conventional-spacing stirrups.

[0011] The arrangement range of the conventional-spacing stirrups is from the top surface to the bottom surface of the beam body, and the closely spaced stirrups are arranged below the bottom surface of the beam body.

[0012] The surface of the top layer column forms a roughened surface, so that after the newly added concrete is poured, it is combined with the top layer column into an integral structure through the roughened surface.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Since the utility model is provided with corner bars, longitudinal bars and stirrups, one end of the corner bar is implanted into the top of the top layer column, and the other end of the corner bar extends to the outside of the top layer column and is used for lapping the longitudinal bars, thus avoiding the situation of the longitudinal bars penetrating upward through the roof slab or being implanted into the roof slab, which causes cracking and leakage of the roof slab. Moreover, the structural strength and safety of the enlarged cross-section structure of the top layer column can be ensured through the longitudinal bars, the stirrups penetrating the beam body and the closely arranged stirrups, connecting the enlarged cross-section structure of the top layer column with the connection between the top layer column and the beam body into an integral whole, further ensuring the construction quality of the enlarged cross-section of the top layer column, and solving the problem of difficult construction of the enlarged cross-section of the top layer column.

[0015] 2. Since the utility model is provided with longitudinal bars, stirrups and newly added concrete, the longitudinal bars and stirrups form a reinforced concrete structure with the newly added concrete, which has high structural strength, can effectively ensure the structural safety of the enlarged cross-section structure of the top layer column, has simple construction procedures and low cost, and is especially suitable for the construction of the enlarged cross-section reinforcement of the top of the top layer column. Description of the Drawings

[0016] Figure 1 is the construction elevation view of the enlarged cross-section structure of the top layer column of the utility model.

[0017] In the figure, 1 is the corner bar, 2 is the longitudinal bar, 3 is the stirrup, 301 is the conventional-spacing stirrup, 302 is the closely spaced stirrup, 4 is the newly added concrete, 5 is the top layer column, 6 is the roof slab, and 7 is the beam body. Detailed Embodiments

[0018] The following further illustrates the utility model in conjunction with the drawings and specific embodiments.

[0019] Please refer to the appendix Figure 1, a structure for increasing the cross-section of the top column, comprising corner bars 1, longitudinal bars 2, stirrups 3 and newly added concrete 4; one end of the corner bar 1 is implanted into the top of the top column 5, and the other end of the corner bar 1 extends to the outside of the top column 5. The corner bars 1 are arranged circumferentially along the top of the top column 5; the upper ends of several longitudinal bars 2 are respectively lapped on the other end of the corner bar 1, so that several longitudinal bars 2 are arranged circumferentially on the outside of the top column 5. The stirrups 3 are tied to several longitudinal bars 2, and several stirrups 3 are arranged at intervals along the axial direction of the longitudinal bars 2; the newly added concrete 4 is poured on the outside of the top column 5 and wraps the longitudinal bars 2 and the stirrups 3 to form a structure for increasing the cross-section of the top column. Moreover, the structure for increasing the cross-section of the top column is connected to the top column 5 as a whole, and the top of the structure for increasing the cross-section of the top column is connected to the bottom surface of the roof slab 6.

[0020] By implanting one end of the corner bar 1 into the top of the top column 5, the other end of the corner bar 1 is used to lap the longitudinal bars 2, without the need to penetrate or implant the longitudinal bars 2 into the roof slab 6, thus avoiding the problem of possible cracking and leakage of the roof slab 6.

[0021] The longitudinal bars 2 and the stirrups 3 are tied by conventional processes. After the newly added concrete 4 is poured, the longitudinal bars 2, the stirrups 3 and the newly added concrete 4 form a structure for increasing the cross-section of the top column, realizing the construction of increasing the cross-section of the top column 5, and ensuring the structural strength and safety of the structure for increasing the cross-section of the top column. At the same time, the process of the entire construction of increasing the cross-section is simple and the cost is low.

[0022] The cross-section of the described corner bar 1 is an inverted L-shaped structure. One end of the horizontal section of the corner bar 1 is implanted into the top column 5, and the other end of the horizontal section of the corner bar 1 extends to the outside of the top column 5, so that the vertical section of the corner bar 1 is arranged on the outside of the top column 5.

[0023] The corner bar 1 can be made of angle steel, cut according to the size of the top column 5. The corner bar 1 fixes the steel bar structure formed by the longitudinal bars 2 and the stirrups 3 to the outside of the top column 5 and transfers the load to the top column 5, thus ensuring the construction of increasing the cross-section of the top column 5 under the condition that the longitudinal bars 2 do not penetrate or implant into the roof slab 6.

[0024] The horizontal section of the described corner bar 1 is arranged parallel to the bottom of the roof slab 6, and the implantation depth of the horizontal section of the corner bar 1 into the top column 5 is not less than 15 times the thickness of the horizontal section of the corner bar 1, that is, 15d.

[0025] The horizontal section of the corner bar 1 can be as close as possible to the bottom of the roof slab 6, thus ensuring the connection reliability between the structure for increasing the cross-section of the top column and the bottom of the roof slab 6.

[0026] The vertical section of the described corner bar 1 is lapped with the longitudinal bars 2, and the lap length between the vertical section of the corner bar 1 and the longitudinal bars 2 is not less than 10 times the diameter of the longitudinal bars 2, that is, 10d.

[0027] The vertical section of the angle reinforcement 1 provides a fixing condition for the top of the longitudinal reinforcement 2, and the fixing reliability of the longitudinal reinforcement 2 at the top of the top column 5 is guaranteed by controlling the overlap length.

[0028] When the stirrups 3 meet the existing beam body 7, the stirrups 3 penetrate the beam body 7, thereby connecting the top column with an enlarged cross-section structure and the beam body 7 into a whole.

[0029] The stirrups 3 include stirrups 301 with regular spacing and dense stirrups 302 , and the steel bar spacing of the dense stirrups 302 is smaller than the steel bar spacing of the stirrups 301 with regular spacing.

[0030] The steel bar spacing of the conventional spacing stirrups 301 and the degree of density of the dense stirrups 302 can be adaptively adjusted according to actual construction requirements to ensure the structural strength and safety of the enlarged cross-section structure of the top-level column.

[0031] The conventionally spaced stirrups 301 are arranged from the top surface to the bottom surface of the beam body 7 , and the dense stirrups 302 are arranged below the bottom surface of the beam body 7 .

[0032] Since the stirrups 301 with regular spacing pass through the beam body 7, the enlarged cross-section structure of the top-level column is connected to the beam body 7 and has a higher structural strength. The structural strength and safety of the enlarged cross-section structure of the top-level column can be ensured by the densely arranged stirrups 302 under the bottom surface of the beam body 7.

[0033] The surface of the top column 5 is formed with a roughened surface (not shown in the figure), so that after the newly added concrete 4 is poured, it can be combined with the top column 5 through the roughened surface to form an integral structure.

[0034] The roughened area of the top column 5 is determined according to the pouring area of the newly added concrete 4 to ensure that the roughened surface can enhance the bonding strength with the top column 5 after the pouring of the newly added concrete 4 is completed.

[0035] Please see attached Figure 1 , the construction method of the utility model is:

[0036] 1. Roughen the surface of the core area of the top of the top column 5 to form a roughened surface, and then clean the roughened surface.

[0037] 2. The horizontal section of the L-shaped corner reinforcement 1 is implanted into the top of the top column 5 with a depth of 15d, so that the vertical section of the corner reinforcement 1 is located outside the top of the top column 5.

[0038] 3. Multiple longitudinal bars 2 are overlapped at intervals on the vertical section of the angle bar 1 by single-sided welding, and the overlap length of the vertical section of the longitudinal bar 2 and the angle bar 1 is 10d.

[0039] 4. Multiple longitudinal bars 2 are tied with stirrups 3 to form an integral steel bar structure. The conventional-spacing stirrups 301 in the core area at the top of the column pass through the frame beam, i.e., the beam body 7, and the closely spaced stirrups 302 below the core area at the top of the column are arranged in a densified manner.

[0040] 5. Set up formwork and pour with self-compacting fine aggregate concrete having a strength one grade higher than that of the top-layer column 5 to form the additional concrete 4, realizing the construction of increasing the cross-section of the top-layer column 5. The additional concrete 4 is connected to the top-layer column 5 as a whole through the roughened surface.

[0041] The above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A top column enlarged cross-section structure, characterized in that: It includes corner bars (1), longitudinal bars (2), stirrups (3) and newly added concrete (4); one end of the corner bar (1) is implanted into the top of the top - floor column (5), and the other end of the corner bar (1) extends outside the top - floor column (5). The corner bars (1) are arranged circumferentially around the top of the top - floor column (5); the upper ends of several longitudinal bars (2) are respectively lapped on the other end of the corner bar (1), so that several longitudinal bars (2) are arranged circumferentially outside the top - floor column (5). The stirrups (3) are tied to several longitudinal bars (2), and several stirrups (3) are arranged at intervals along the axial direction of the longitudinal bars (2); the newly added concrete (4) is poured outside the top - floor column (5) and wraps the longitudinal bars (2) and the stirrups (3) to form a structure with an enlarged cross - section of the top - floor column. And the structure with an enlarged cross - section of the top - floor column is connected to the top - floor column (5) as a whole, and the top of the structure with an enlarged cross - section of the top - floor column is connected to the bottom surface of the roof slab (6).

2. The top column enlarged cross-section structure according to claim 1, characterized in that: The cross - section of the corner bar (1) is an inverted L - shaped structure. One end of the horizontal section of the corner bar (1) is implanted into the top - floor column (5), and the other end of the horizontal section of the corner bar (1) extends outside the top - floor column (5), so that the vertical section of the corner bar (1) is arranged outside the top - floor column (5).

3. The enlarged cross-section structure of the top column according to claim 2, wherein: The horizontal section of the corner bar (1) is arranged parallel to the bottom of the roof slab (6), and the implantation depth of the horizontal section of the corner bar (1) into the top - floor column (5) is not less than 15 times the thickness of the horizontal section of the corner bar (1).

4. The top column enlarged cross-section structure according to claim 2, characterized in that: The vertical section of the corner bar (1) is lapped with the longitudinal bar (2), and the lap length between the vertical section of the corner bar (1) and the longitudinal bar (2) is not less than 10 times the diameter of the longitudinal bar (2).

5. The top column enlarged cross-section structure according to claim 1, characterized in that: When the stirrup (3) encounters the existing beam body (7), the stirrup (3) penetrates through the beam body (7) to connect the structure with an enlarged cross - section of the top - floor column and the beam body (7) as a whole.

6. The enlarged cross-section structure of the top column according to claim 5, characterized in that: The stirrup (3) includes a stirrup with a normal spacing (301) and a stirrup with a densified spacing (302). The bar spacing of the stirrup with a densified spacing (302) is smaller than the bar spacing of the stirrup with a normal spacing (301).

7. The enlarged cross-section structure of the top column according to claim 6, characterized in that: The arrangement range of the stirrup with a normal spacing (301) is from the top surface to the bottom surface of the beam body (7), and the stirrup with a densified spacing (302) is arranged below the bottom surface of the beam body (7).

8. The top column enlarged cross-section structure according to any one of claims 1-3, characterized in that: The surface of the top - floor column (5) is formed with a roughened surface, so that after the newly added concrete (4) is poured, it is combined with the top - floor column (5) through the roughened surface to form an integral structure.

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