Steel tube concrete column pier and steel box girder connecting joint structure

Abstract

The utility model discloses a kind of steel pipe concrete column type pier and steel box girder connecting joint structure, including pier column steel pipe, including pier column steel pipe, the pier column steel pipe top end is provided with steel box girder main body, the reinforcing steel bar of annular array is vertically bound in the pier column steel pipe, the pier column steel pipe pours in-pipe concrete, two first openings that are parallel and left and right through are set up in the pier column steel pipe upper end, the second opening that is through front and back is also set up in the pier column steel pipe upper end. The utility model relates to the technical field of steel pipe concrete column type pier, can enhance the connecting strength of pier column steel pipe and steel box girder main body, simultaneously reinforcing steel and first jack cooperation, can make steel box girder main body and pier column steel pipe firm combination, expand connection area, overcome the problem of low traditional plug-in connection strength, can long-term keep enough connecting stable effect, guarantee bridge structure safety.

Description

Technical Field

[0001] This utility model relates to the technical field of steel-concrete composite column piers, specifically a connection node structure between a steel-concrete composite column pier and a steel box girder. Background Technology

[0002] Concrete-filled steel tube piers are a common type of pier used in existing steel-concrete bridges. Their general structure consists of an outer steel tube and an inner concrete pier, and their shape is generally cylindrical. Steel box girders generally refer to bridges that are welded from steel plates and have a box-like shape.

[0003] A rigid connection structure for a steel box girder pedestrian bridge pier, patent number CN216615467U, includes a steel box girder, supporting transverse diaphragms, steel piers, and stiffening plates. The steel box girder and the steel piers are welded together at the connection node to form a rigid connection node for the pier and beam. The steel piers, reinforced by stiffening plates at the rigid connection node, extend into the steel box girder and form a rigid force-bearing system for the pier and beam together with the supporting transverse diaphragms, the top plate of the steel box girder, and the bottom plate of the steel box girder.

[0004] In practical application, the steel piers and steel box girders are connected only by plugging, and the connection area between them is relatively small. Therefore, the connection strength is relatively low, and it is difficult for the steel piers and steel box girders to maintain a sufficient connection stability for a long time, resulting in a poor overall connection effect. Utility Model Content

[0005] The present invention aims to provide a structure for the connection node between a steel-concrete composite column pier and a steel box girder to enhance the stability of the connection.

[0006] Therefore, the technical solution adopted by this utility model is as follows: a connection node structure between a steel pipe concrete column pier and a steel box girder, including a pier steel pipe, a steel box girder body is set at the top of the pier steel pipe, reinforcing bars arranged in a ring array are vertically tied inside the pier steel pipe, concrete is poured into the pier steel pipe, two parallel and horizontally connected first openings are opened at the upper end of the pier steel pipe, and a second opening that is connected front and back is also opened at the upper end of the pier steel pipe;

[0007] Each first opening is fitted with a reinforcing member, the reinforcing member including a crossbar inserted into the first opening, the left and right ends of the crossbar curving upward to form an inclined portion, the top of the inclined portion being provided with an insert block, and a limit rod being inserted into the second opening;

[0008] The main body of the steel box girder includes a base frame and a top plate. Vertical plates are evenly arranged in the box-shaped space enclosed by the base frame and the top plate. The lower side of the base frame is provided with a first insertion hole corresponding to the reinforcing steel bar and a second insertion hole corresponding to the insertion block.

[0009] Preferably, the limiting rod extends to the left and right sides at both ends to form a wedge-shaped portion.

[0010] Preferably, the limiting rod is arranged perpendicularly to the crossbar, and both the limiting rod and the crossbar have limiting holes, with the upper side of the reinforcing steel bar inserted into the limiting holes.

[0011] Preferably, the limiting rod is located above the crossbar, and the reinforcing steel bar passing through the crossbar also passes through the limiting rod.

[0012] Preferably, there are a total of 6 reinforcing steel bars arranged in a ring array.

[0013] The beneficial effects of this utility model are:

[0014] 1. The first and second openings are made on the steel pipe of the pier column, and the reinforcing member and the limiting rod are inserted respectively. The inclined part on the crossbar of the reinforcing member is tightly connected to the bottom frame of the main body of the steel box girder through the insert block and the second insertion hole, which enhances the connection strength between the steel pipe of the pier column and the main body of the steel box girder. At the same time, the reinforcement is strengthened and matched with the first insertion hole, which can make the main body of the steel box girder and the steel pipe of the pier column firmly connected, expand the connection area, overcome the problem of low strength of traditional insert connection, and maintain sufficient connection stability for a long time, ensuring the safety of the bridge structure.

[0015] 2. The reinforcing members, limiting rods, and reinforcing bars work together to form a multi-dimensional force transmission path. The inclined part of the reinforcing member can effectively disperse the load transmitted by the steel box girder, and the limiting rod prevents relative displacement between the steel box girder and the pier steel pipe, making the structure more uniform and reasonable in terms of stress. Compared with the traditional connection method, this structure optimizes the stress system, improves the overall performance of the structure, and can better adapt to various loads during bridge operation, reduce the risk of structural damage, and extend the service life of the bridge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0018] Figure 3 for Figure 2 A schematic diagram of its breakdown.

[0019] Figure 4 This is a bottom schematic diagram of the main body of the steel box girder of this utility model.

[0020] Figure 5 This is the main sectional view of the present invention.

[0021] In the diagram: 1. Pier steel pipe, 2. Reinforcing steel bar, 3. Concrete inside the pipe, 4. First opening, 5. Second opening, 6. Limiting rod, 7. Base frame, 8. Vertical plate, 9. Top plate, 10. First insertion hole, 11. Horizontal bar, 12. Inclined part, 13. Insert block, 14. Second insertion hole, 15. Wedge-shaped part. Detailed Implementation

[0022] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] like Figure 1-5 As shown, a connection node structure between a steel-concrete composite column pier and a steel box girder includes a pier steel pipe 1, with a steel box girder main body installed at the top of the pier steel pipe 1.

[0024] The pier steel pipe 1 is vertically bound with reinforcing steel bars 2 arranged in a ring, preferably a total of 6 reinforcing steel bars 2 arranged in a ring.

[0025] The pier steel pipe 1 is filled with concrete 3. The upper end of the pier steel pipe 1 has two parallel and horizontally connected first openings 4. The upper end of the pier steel pipe 1 also has a front-to-back connected second opening 5.

[0026] There are two through-holes 4, each with a reinforcing member inserted into it. A limit rod 6 is inserted into the second opening 5. The reinforcing member includes a crossbar 11 inserted into the first opening 4. The left and right ends of the crossbar 11 curve upward to form inclined portions 12, and a plug 13 is provided at the top of the inclined portion 12.

[0027] The main body of the steel box girder includes a base frame 7 and a top plate 9. Vertical plates 8 are evenly arranged within the box-shaped space enclosed by the base frame 7 and the top plate 9. The base frame 7 has a first insertion hole 10 corresponding to the reinforcing steel bar 2 and a second insertion hole 14 corresponding to the insertion block 13 on its lower side.

[0028] It should be noted that during the construction process, multiple sets of reinforcing steel bars 2 are first tied and fixed, then the steel pipe 1 of the pier column is placed on the outside of the multiple sets of reinforcing steel bars 2, and concrete 3 is poured into the inside of the steel pipe 1 to complete the construction of the steel pipe concrete column pier.

[0029] Then, the two horizontal bars 11 are inserted into the two first openings 4 respectively. At the same time, the limiting hole in the middle part of the horizontal bar 11 will be inserted into the reinforcing bar 2. The limiting rod 6 is inserted into the second opening 5. At the same time, the limiting holes on the front and rear sides of the limiting rod 6 will be inserted into the reinforcing bar 2. The reinforcing bar 2 not only increases the overall strength of the steel pipe concrete column pier, but also limits the position of the horizontal bar 11 and the limiting rod 6 to prevent them from shifting and affecting the connection of the subsequent steel box girder. The limiting rod 6 can limit the horizontal bar 11 in the vertical direction.

[0030] After the installation of the limiting rod 6 and the crossbar 11 is completed, the main body of the steel box girder can be moved to the upper side of the pier steel pipe 1 using a hoisting device, and the main body of the steel box girder can be lowered so that the upper side of the reinforcing bar 2 can be inserted into the first insertion hole 10 on the base frame 7. At the same time, the insertion block 13 on the inclined part 12 will be inserted into the second insertion hole 14. At this time, the upper side of the limiting rod 6 will be in close contact with the lower end face of the base frame 7, and the front and rear ends of the limiting rod 6 extend to the left and right sides to form a wedge-shaped part 15, which can increase the contact area between the limiting rod 6 and the base frame 7. The reinforcing member, the limiting rod 6 and the reinforcing bar 2 cooperate with each other to form a multi-dimensional force transmission path. The inclined part 12 of the reinforcing member can effectively disperse the load transmitted by the steel box girder. The limiting rod 6 prevents the steel box girder and the pier steel pipe 1 from relative displacement, making the structure more uniform and reasonable in terms of stress.

[0031] In summary, this connection node structure can firmly connect the main body of the steel box girder with the steel pipe 1 of the pier column, expand the connection area, overcome the problem of low strength of traditional plug-in connections, maintain sufficient connection stability for a long time, ensure the safety of the bridge structure, optimize the stress system, improve the overall performance of the structure, better adapt to various loads during bridge operation, reduce the risk of structural damage, and extend the service life of the bridge.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connection structure between a steel-concrete composite column pier and a steel box girder, comprising a pier column steel pipe (1), characterized in that, The pier steel pipe (1) is equipped with a steel box girder body at the top. The pier steel pipe (1) is vertically bound with reinforcing steel bars (2) arranged in a ring. The pier steel pipe (1) is filled with concrete (3). The pier steel pipe (1) has two parallel and horizontally connected first openings (4) at the top. The pier steel pipe (1) also has a front-to-back connected second opening (5) at the top. Each first opening (4) is fitted with a reinforcing member, the reinforcing member including a crossbar (11) inserted into the first opening (4), the left and right ends of the crossbar (11) are raised to form an inclined portion (12), the top of the inclined portion (12) is provided with a plug (13), and a limit rod (6) is inserted into the second opening (5). The main body of the steel box girder includes a base frame (7) and a top plate (9). Vertical plates (8) are evenly arranged in the box-shaped space enclosed by the base frame (7) and the top plate (9). The base frame (7) has a first insertion hole (10) corresponding to the reinforcing steel bar (2) and a second insertion hole (14) corresponding to the insertion block (13) on its lower side.

2. The connection node structure between the steel-concrete composite column pier and the steel box girder according to claim 1, characterized in that, The limiting rod (6) extends to the left and right sides at both ends to form a wedge-shaped part (15).

3. The connection node structure between the steel-concrete composite column pier and the steel box girder according to claim 1, characterized in that, The limiting rod (6) is set perpendicularly to the crossbar (11), and limiting holes are opened on both the limiting rod (6) and the crossbar (11). The upper side of the reinforcing steel bar (2) is inserted into the limiting hole.

4. The connection node structure between the steel-concrete composite column pier and the steel box girder according to claim 3, characterized in that, The limiting rod (6) is located above the crossbar (11), and the reinforcing steel bar (2) that passes through the crossbar (11) also passes through the limiting rod (6).

5. The connection node structure between the steel-concrete composite column pier and the steel box girder according to claim 1, characterized in that, The reinforcing steel bars (2) arranged in a ring array consist of 6 bars in total.

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