Subway upper cover connecting frame column connecting node

Abstract

The utility model discloses a subway upper cover connecting frame column connecting node which comprises an existing frame beam, an existing frame column, an existing top plate, an expansion column pier and a connecting frame column, the expansion column pier is arranged on the existing frame column, the section size of the expansion column pier is larger than that of the existing frame column, and the expansion column pier is fixedly connected with the existing frame beam and the existing top plate. Reinforcing bars are arranged in the expanded column pier and comprise column pier main reinforcements fixed to an existing frame beam and an existing top plate; the column pier short limb tie bars, the column pier stirrups and the column pier U-shaped upper cover bars are arranged at the top of the expanded column pier, and openings of the column pier short limb tie bars, the column pier stirrups and the column pier U-shaped upper cover bars face downwards; one end of the U-shaped upper cover rib tie bar is connected with the column pier U-shaped upper cover rib, and the other end of the U-shaped upper cover rib tie bar is fixed with the existing frame beam or the existing top plate; and the connecting frame column main reinforcements are inserted into the expanded column piers and are connected with the column pier main reinforcements through connecting frame column tie bars. The problem that steel bars cannot be planted due to staggered and dense steel bars at the top of an original subway frame column is solved, structural safety is guaranteed, cost is saved, and the construction speed is high.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a connection node for a subway upper cover frame column. Background Art

[0002] With the rapid development of subways and the scarcity of plannable land in large and medium-sized cities, the construction of subway superstructures is urgent. Utilizing limited space for urban development without impacting normal subway operations places high demands on construction and management. Subway superstructure connections primarily involve the joining of frame columns and frame beams. Frame columns, as the main load-bearing components of the superstructure, are crucial for this connection. However, the pre-reinforced reinforcement at the top of the original subway frame columns often fails to meet load-bearing requirements. Furthermore, the cross-section of frame beams at this location creates dense reinforcement that greatly complicates post-installation rebar installation, making construction difficult, costly, and inefficient. Utility Model Content

[0003] The utility model provides a connection node for a subway upper cover frame column, which ensures structural safety, saves costs and increases construction speed.

[0004] The technical problem to be solved is: the steel bars on the top of the original frame columns of the subway are intertwined and dense, making it impossible to plant steel bars.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The utility model discloses a connection node for connecting frame columns of a subway roof, which comprises an existing frame beam, an existing frame column and an existing top plate, and also comprises an enlarged column pier and a connecting frame column. The enlarged column pier is arranged on the existing frame column, and its cross-sectional size is larger than that of the existing frame column. The enlarged column pier is connected and fixed to the existing frame beam and the existing top plate.

[0007] The utility model provides a connection node for a frame column connected to a subway cover. Furthermore, the axis of the connected frame column is consistent with the axis of the existing frame column.

[0008] The utility model provides a connection node for a frame column connected to a subway cover. Furthermore, the concrete strength grade and specification size of the connected frame column are not less than those of the existing frame column.

[0009] The utility model provides a connection node for a subway roof frame column connection. Furthermore, the side length of the enlarged column pier is greater than or equal to 2.5 times the side length of the connection frame column, and the height is not less than 1m.

[0010] The utility model provides a connection node for a frame column connected to a subway cover. Furthermore, hidden beams are connected between the enlarged column piers. The hidden beams are located on top of the existing frame beams. The width of the hidden beams is greater than the width of the connected frame column.

[0011] The utility model provides a connection node for a subway cover frame column connection. Furthermore, the hidden beam is arranged in a cross shape, and the intersection center is consistent with the axis of the existing frame column and the connected frame column.

[0012] The utility model provides a connection node for a subway roof frame column. Furthermore, the expanded column pier is provided with reinforcement, and the reinforcement includes:

[0013] The main reinforcement of the column pier is fixed to the existing frame beam and the existing top plate;

[0014] Column pier stirrups, connecting the main reinforcement of the column pier;

[0015] The U-shaped upper cover reinforcement of the pier is set on the top of the expanded pier with the opening facing downwards;

[0016] The U-shaped top cover reinforcement tie bar has one end connected to the pier U-shaped top cover reinforcement and the other end fixed to the existing frame beam or existing top plate;

[0017] The connecting frame column is provided with a connecting frame column main reinforcement, and the connecting frame column main reinforcement is inserted into the expanded column pier and connected with the column pier main reinforcement through the column pier and the connecting frame column reinforcement.

[0018] The utility model provides a connection node for a frame column of a subway roof. Furthermore, at least two rows of column pier main reinforcement are arranged, and the multiple rows of column pier main reinforcement are tied and fixed by means of column pier short-limb tie bars.

[0019] The utility model provides a connection node for a subway roof frame column. Furthermore, the bottom of the main reinforcement of the frame column is bent outwards by 90 degrees.

[0020] The utility model provides a connection node for a subway roof frame column. Furthermore, the column pier U-shaped roof reinforcement and the U-shaped roof reinforcement tie reinforcement are connected by single-sided welding.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By adding an expanded column pier between the newly constructed frame column and the existing frame column, and connecting the expanded column pier to the existing top plate and frame beam using embedded reinforcement, the problem of interlaced and dense reinforcement on the top of the original subway frame column, which makes it impossible to embed reinforcement, is avoided, thus ensuring structural safety.

[0023] 2. The proposed structure is simple to construct and highly adaptable, with minimal impact on the subway structure and surrounding environment. It is fast to construct, highly efficient, and cost-effective.

[0024] 3. The expanded piers are connected as a whole through hidden beams to ensure the load-bearing performance of the structure; the short-leg tie bars of the piers, the tie bars between the piers and the connected frame columns, the U-shaped upper cover bars of the piers, and the U-shaped upper cover tie bars are used to improve the strength of the expanded piers and the expanded piers and the connected frame columns to ensure the connection performance.

[0025] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Plan of the connection nodes of the frame columns for the subway superstructure;

[0027] Figure 2 Schematic diagram of reinforcing bars for the expanded column piers of the subway superstructure;

[0028] Figure 3 This is a schematic diagram of the reinforcement ribs on the top of the expanded column pier of the subway cover;

[0029] Figure 4 Cross-section drawing of the connection nodes of the frame columns for the subway superstructure;

[0030] Figure 5 To expand the cross-section of the reinforcement at the top of the pier;

[0031] Figure 6 To expand the schematic diagram of the hidden beam of the pier.

[0032] Reference numerals:

[0033] 1. Existing frame beams; 2. Existing top slabs; 3. Existing frame columns; 4. Enlarged piers; 401. Main reinforcement of piers; 402. Short-leg tie bars of piers; 403. Stirrups of piers; 404. Tie bars between piers and connected frame columns; 405. U-shaped upper cover bars of piers; 406. Tie bars of U-shaped upper cover bars; 5. Connected frame columns; 501. Main reinforcement of connected frame columns; 502. Stirrups of connected frame columns; 6. Concealed beams; 601. Main reinforcement of concealed beams; 602. Stirrups of concealed beams. DETAILED DESCRIPTION

[0034] Example 1:

[0035] like Figures 1-6 As shown, the utility model discloses a connection node for the frame columns of a subway roof, comprising an existing frame beam 1, an existing frame column 3, an existing top plate 2, an enlarged column pier 4, a connection frame column 5 and a hidden beam 6. The connection frame column 5 is located on the top of the existing frame column 3 and is connected and fixed to the existing frame beam 1 and the existing top plate 2 by using the enlarged column pier 4; the horizontal position of the connection frame column 5 is located inside the enlarged column pier 4, and the top is not higher than the elevation of the finished building surface at this position.

[0036] The axis of the newly built frame column 5 is consistent with that of the existing frame column 3, and the concrete strength grade and specifications of the newly built frame column 5 are not less than those of the existing frame column 3.

[0037] The cross-sectional dimension of the expanded column 4 is larger than that of the connected frame column 5 , and the side length thereof is greater than or equal to 2.5 times the side length of the connected frame column 5 , and the height is not less than 1 m.

[0038] The hidden beam 6 is connected between the expanded column piers 4 and is located on the top of the existing frame beam 1, in a cross-shaped arrangement. The center point of the intersection is consistent with the axis of the existing frame column 3 and the connected frame column 5. The width of the hidden beam 6 is greater than the width of the connected frame column 5; the hidden beam 6 is provided with hidden beam main reinforcement 601 and hidden beam stirrups 602.

[0039] The expanded pier 4 is internally reinforced with reinforcement, including main pier reinforcement 401, short pier tie bars 402, stirrups 403, tie bars 404 between the pier and the adjacent frame column, U-shaped upper cover bars 405, and tie bars 406 for the U-shaped upper cover. At least two rows of main pier reinforcement 401 are provided, with the same diameter as the adjacent frame column main reinforcement 501. They are anchored to the existing frame beam 1 and top slab 2 using embedded reinforcement. The embedded reinforcement depth is ≥15d, where d is the diameter of the main pier reinforcement 401. Each row of main pier reinforcement 401 is connected by short pier tie bars 402.

[0040] The U-shaped upper cover reinforcement 405 of the pier is arranged at the top layer of the internal reinforcement of the expanded pier 4. The U-shaped upper cover tie reinforcement is fixed to the existing frame beam 1 and the existing top plate 2 by planting reinforcement. The planting reinforcement depth is ≥15d, where d is the diameter of the U-shaped upper cover tie reinforcement. The connection method between the U-shaped upper cover reinforcement 405 of the pier and the U-shaped upper cover reinforcement tie reinforcement 406 is single-sided welding, and the welding length is 10d, where d is the diameter of the U-shaped upper cover reinforcement 405 of the pier.

[0041] The connecting frame column 5 includes the connecting frame column main reinforcement 501 and the connecting frame column stirrups 502. The lower end of the connecting frame column main reinforcement 501 is inserted into the expanded column pier 4 and extends to the top surface of the existing frame column 3. Each row of the connecting frame column main reinforcement 501 is connected to the column pier main reinforcement 401 through the column pier and the connecting frame column tension reinforcement 404; the bottom of the connecting frame column main reinforcement 501 is bent outward at 90°, and the length of the bending section is ≥300mm.

[0042] The construction method is as follows:

[0043] Step 1: Clear the soil covering the top of the existing frame beam 1 and the existing top plate 2, conduct a test drill on the top of the existing frame column 3, and determine the number of main reinforcement bars 501 of the frame column that can be rebar-embedded.

[0044] Step 2: Determine the number and specifications of reinforcement for the expanded column pier 4 of the subway cover, plant reinforcement on the top of the existing frame beam 1 and the existing top plate 2 of the subway structure, construct the column pier main reinforcement 401 and U-shaped cover reinforcement tie reinforcement 406, then tie the column pier short leg reinforcement 402, column pier stirrups 403, column pier and connected frame column reinforcement 404, and weld the column pier U-shaped cover reinforcement 405.

[0045] Step 3: Tie up the main reinforcement 501 and stirrups 502 of the frame column.

[0046] Step 4: Pour the concrete for the expanded column pier 4. After initial setting, continue pouring the concrete for the connecting frame column 5, and cover with film for maintenance.

[0047] Step 5: After the concrete strength reaches the requirement, backfill the existing frame beam 1 and the top of the existing top plate 2 in time to complete the subsequent construction process.

[0048] Example 2:

[0049] In a specific embodiment of the present application:

[0050] The concrete strength grade of the connected frame column 5 and the existing frame column 3 is C40, and the specification size of the connected frame column 5 is 1000mm×900mm; the beam width of the hidden beam 6 is 1100mm, the side length of the expanded column pier 4 is 2600mm×2500mm, and the height is 1.2m; the main reinforcement 401 of the column pier and the main reinforcement 501 of the connected frame column are 18mm in diameter, and the short-leg tie reinforcement 402 of the column pier is 12mm@100mm in diameter; the tie reinforcement 404 between the column pier and the connected frame column is 12mm@100mm in diameter.

[0051] The embodiments described above are merely descriptions of preferred implementation methods of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A subway roof frame column connection node, comprising an existing frame beam (1), an existing frame column (3) and an existing roof (2), characterized in that: It also includes an enlarged column pier (4) and a connected frame column (5). The enlarged column pier (4) is arranged on the existing frame column (3), and its cross-sectional size is larger than the cross-sectional size of the existing frame column (3). The enlarged column pier (4) is connected and fixed to the existing frame beam (1) and the existing top plate (2).

2. The subway roof frame column connection node according to claim 1, characterized in that: The axis of the connected frame column (5) is consistent with that of the existing frame column (3).

3. The subway roof frame column connection node according to claim 1 is characterized by: The concrete strength grade and specification size of the connected frame column (5) are not less than those of the existing frame column (3).

4. The subway roof frame column connection node according to claim 1, characterized in that: The side length of the enlarged column pier (4) is greater than or equal to 2.5 times the side length of the connected frame column (5), and the height is not less than 1m.

5. The subway roof frame column connection node according to claim 1 is characterized by: A hidden beam (6) is connected between the enlarged column piers (4), and the hidden beam (6) is located on the top of the existing frame beam (1). The beam width of the hidden beam (6) is greater than the width of the connected frame column (5).

6. The subway roof frame column connection node according to claim 5, characterized in that: The hidden beams (6) are arranged in a cross-shaped manner, and the center point of the intersection is consistent with the axis of the existing frame column (3) and the connected frame column (5).

7. The subway roof frame column connection node according to claim 1, characterized in that: The expanded column pier (4) is provided with reinforcement, and the reinforcement includes: The main reinforcement of the pier (401) is fixed to the existing frame beam (1) and the existing top plate (2); Column pier stirrups (403), connecting the column pier main reinforcement (401); The column pier U-shaped upper cover rib (405) is arranged on the top of the enlarged column pier (4) with the opening facing downward; A U-shaped upper cover reinforcement tie bar (406), one end of which is connected to the column pier U-shaped upper cover reinforcement (405), and the other end is fixed to the existing frame beam (1) or the existing top plate (2); The connecting frame column (5) is provided with a connecting frame column main reinforcement (501), and the connecting frame column main reinforcement (501) is inserted into the expanded column pier (4) and connected to the column pier main reinforcement (401) through the column pier and the connecting frame column reinforcement (404).

8. The subway roof frame column connection node according to claim 7, characterized in that: The column pier main reinforcement (401) is provided in at least two rows, and the multiple rows of column pier main reinforcement (401) are tied and fixed by the column pier short limb reinforcement (402).

9. The subway roof frame column connection node according to claim 7, characterized in that: The bottom of the main reinforcement (501) of the connecting frame column is bent outwards by 90°.

10. The subway roof frame column connection node according to claim 7, characterized in that: The column pier U-shaped upper cover reinforcement (405) and the U-shaped upper cover reinforcement tie reinforcement (406) are connected by single-sided welding.

Images