A main tower support of a hundred-meter large-section combined beam

Abstract

The utility model relates to a kind of main tower support of hundred-meter large section combined beam, including upper support body and lower support body, upper support body includes upper panel, first web, second web and web baffle, upper panel and web baffle are welded in the same side of first web, and all with first web vertical, second web includes two web sub-panels, two web sub-panels are symmetrically arranged in the two sides of first web, each web sub-panel has Z-shaped edge line for being cooperated with combined beam steel box to form welded joint seam in the side away from upper panel;Lower support body includes lower panel, third web and fourth web, lower panel is arranged below first web, third web is arranged in the side of first web away from web baffle, fourth web is welded in the side of third web away from first web;The main tower support of the utility model, simple structure, it is convenient to make, and the connection strength of steel box is high, reduce the probability that support and steel box splicing weld two ends appear fatigue crack.

Description

Technical Field

[0001] This utility model relates to the field of cable-stayed bridge structure technology, and in particular to a main tower support for a 100-meter large segment combined beam. Background Technology

[0002] The main bridge of the long-span composite steel box girder railway cable-stayed bridge uses steel box girder composite beams at both ends and a steel box girder in the middle. During construction, the main bridge was divided into multiple segments, fabricated separately, and then hoisted as a whole, with the longest segment reaching 107.5m. Each steel box girder composite beam segment consists of a steel box body, vents, and main tower supports. The main tower supports are installed on both sides of the steel box body to connect the main tower and transfer loads. Existing main tower supports, to meet their own strength requirements, typically use a box structure, which is not only structurally complex and heavy, but also has a complex manufacturing process and relatively low connection strength with the steel box body. Fatigue cracks often occur at both ends of the weld joint between the support and the steel box body, posing a potential hazard to bridge operation.

[0003] Therefore, this utility model proposes a main tower support for a 100-meter large segment combined beam to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a main tower support for a 100-meter large segment combined beam. It has a simple structure, is easy to manufacture, and has high connection strength with the steel box body, reducing the probability of fatigue cracks at both ends of the splice weld between the support and the steel box body.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a main tower support for a 100-meter large-segment composite beam, installed on the steel box body of the composite beam, the innovation of which is: including The upper support body includes an upper panel, a first web, a second web, and a web baffle. The first web is vertically arranged. The upper panel and the web baffle are welded to the same side of the first web and are both perpendicular to the first web. The second web includes two web plates, which are symmetrically arranged on both sides of the first web. One side of the web plate is welded perpendicularly to the first web, and the other side is welded to the upper panel. Each web plate has a Z-shaped edge line on the side away from the upper panel for forming a welded joint with the steel box of the composite beam. The lower support body includes a lower panel, a third web plate, and a fourth web plate. The lower panel is located below the first web plate and is vertically welded to the first web plate. The third web plate is located on the side of the first web plate away from the web plate baffle, and the bottom side of the third web plate is welded to the lower panel. The fourth web plate is welded to the side of the third web plate away from the first web plate and is in the same plane as the first web plate. The bottom side of the fourth web plate is vertically welded to the lower panel.

[0006] Furthermore, the Z-shaped edge line includes a first straight line segment, a first circular arc segment, a second circular arc segment, and a second straight line segment connected in sequence; The two ends of the first arc segment are the first end and the second end, respectively. The first end of the first arc segment is connected to the end of the first straight segment away from the first web. The second end of the first arc segment is located on the side of the first end close to the first web and on the side of the first end close to the top panel. The center of the first arc segment is located on the side of the first arc segment away from the first straight segment. The first arc segment and the first straight segment cooperate to form a tongue-shaped protrusion structure. The two ends of the second arc segment are the third end and the fourth end, respectively. The third end of the second arc segment is connected to the second end of the first arc segment. The fourth end of the second arc segment is located on the side of the third end away from the first web plate and on the side of the third end away from the top panel, and on the side of the first end of the first arc segment close to the top panel. The center of the second arc segment is located on the side of the second arc segment away from the first arc segment. The second arc segment and the first arc segment cooperate to form a V-shaped groove. The two ends of the second straight segment are the fifth end and the sixth end, respectively. The fifth end of the second straight segment is connected to the fourth end of the second arc segment. The sixth end of the second straight segment is located on the side of the fifth end away from the first web. The second straight segment is parallel to the first straight segment.

[0007] Furthermore, the upper panel is vertically arranged, the web baffle is located below the upper panel and is inclined from top to bottom towards the third web, the top side of the web baffle is welded to the upper panel, and the bottom side of the web baffle is welded to the lower panel.

[0008] Furthermore, the first web plate has a positioning slot on the side away from the web plate baffle for the bottom edge of the connecting beam steel box body to enter.

[0009] The advantages of this utility model are: (1) The main tower support of this utility model adopts a split structure. When installing the main tower support, the upper support body can be welded to the steel box of the connecting beam first, and then the lower support body can be installed. This is beneficial to improve and reduce the installation difficulty of the main tower support. In addition, the upper part of the first web plate uses the upper panel and the second web plate to form a stable support structure. The middle part of the first web plate uses the web plate baffle to reduce deformation. The bottom of the first web plate uses the lower panel, the third web plate and the fourth web plate to achieve structural reinforcement. The overall structure is simple and stable and easy to manufacture. In addition, the Z-shaped edge line design of the second web plate effectively improves the connection strength of the weld end of the second web plate and the steel box of the structural beam, and reduces the probability of fatigue cracks appearing at both ends of the splice weld between the support and the steel box.

[0010] (2) The Z-shaped edge line of this utility model uses the first straight segment to form the main body of the weld joint between the main tower support and the steel box of the connecting beam. The design of the first and second arc segments not only expands the spacing at the end of the weld joint, which is conducive to better bridging the stress concentration of the weld and reducing the risk of cracking, but also forms a local double weld, which is conducive to improving the rigidity of the weld end node. The design of the second straight segment can increase the length of the wide-spacing weld, thereby further improving the rigidity of the weld end node and improving the connection strength.

[0011] (3) The web baffle of this utility model is inclined and intersects with the vertically set upper panel and the horizontally set lower panel at an angle to form a stable angular structure, thereby improving the overall structural strength of the main tower support and reducing the probability of deformation.

[0012] (4) By opening a positioning slot on the first web plate, the present invention can cooperate with the bottom plate of the combined beam steel box body to realize the positioning of the main tower support when the main tower support is installed, thereby reducing the difficulty of positioning the main tower support. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the upper support body of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the lower support body of this utility model.

[0016] Figure 3 This is a schematic diagram showing the splicing of the Z-shaped edge line of the second web of this utility model with the steel box of the connecting beam.

[0017] Figure 4 A schematic diagram showing the main tower support installed on the steel box girder of the composite beam. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Example This embodiment provides a main tower support for a 100-meter-long segmental composite beam, including an upper support body 1 and a lower support body 2.

[0020] like Figure 1As shown, the upper support body 1 includes an upper panel 11, a first web 12, a second web 13, and a web baffle 14. The first web 12 is vertically arranged. The upper panel 11 and the web baffle 14 are welded to the same side of the first web 12 and are both perpendicular to the first web 12. There are two second webs 13, which are parallel to each other. Each second web 13 includes two web plates. The two web plates are symmetrically arranged on both sides of the first web 12. One side of the web plate is welded perpendicularly to the first web 12, and the other side is welded to the upper panel 11. The side of each web plate away from the upper panel 11 has a Z-shaped edge line for cooperating with the steel box body 3 of the connecting beam to form a welded joint.

[0021] like Figure 3 As shown, the Z-shaped edge line includes a first straight segment 13a, a first arc segment 13b, a second arc segment 13c, and a second straight segment 13d connected in sequence. The two ends of the first arc segment 13b are a first end and a second end, respectively. The first end of the first arc segment 13b is connected to the end of the first straight segment 13a away from the first web 12. The second end of the first arc segment 13b is located on the side of the first end closer to the first web 12 and on the side of the first end closer to the top panel 11. The center of the first arc segment 13b is located on the side of the first arc segment 13b away from the first straight segment c. The first arc segment 13b and the first straight segment 13b cooperate to form a tongue-shaped protrusion structure. The two ends of the second arc segment 13c are a third end and a fourth end, respectively. The third end of the second arc segment 13c... The second arc segment 13c is connected to the second end of the first arc segment 13b. The fourth end of the second arc segment 13c is located on the side of the third end away from the first web plate 12 and on the side of the third end away from the upper panel 11. It is also located on the side of the first end of the first arc segment 13b close to the upper panel 11. The center of the second arc segment 13c is located on the side of the second arc segment 13c away from the first arc segment 13b. The second arc segment 13c and the first arc segment 13b cooperate to form a V-shaped groove. The two ends of the second straight segment 13d are the fifth end and the sixth end, respectively. The fifth end of the second straight segment 13d is connected to the fourth end of the second arc segment 13c. The sixth end of the second straight segment 13d is located on the side of the fifth end away from the first web plate 12. The second straight segment 13d and the first straight segment 13a are parallel to each other.

[0022] The Z-shaped edge line utilizes the first straight segment to form the main body of the weld joint between the main tower support and the steel box of the connecting beam. The design of the first and second circular arc segments not only expands the spacing at the ends of the weld joint, which is conducive to better bridging the stress concentration of the weld and reducing the risk of cracking, but also forms a local double weld, which helps to improve the rigidity of the weld end node. The design of the second straight segment can increase the length of the wide-spacing weld, thereby further improving the rigidity of the weld end node and enhancing the connection strength.

[0023] like Figure 2As shown, the lower support body 2 includes a lower panel 21, a third web 22, and a fourth web 23. The lower panel 21 is located below the first web 12 and is vertically welded to the first web 12. The third web 22 is located on the side of the first web 12 away from the web baffle 14, and the bottom side of the third web 22 is welded to the lower panel 21. The fourth web 23 is welded to the side of the third web 22 away from the first web 12 and is in the same plane as the first web 12. The bottom side of the fourth web 23 is vertically welded to the lower panel 23.

[0024] In this embodiment, the upper panel 11 is vertically arranged, and the web baffle 14 is located below the upper panel 11 and is inclined from top to bottom towards the third web 22. The top side of the web baffle 14 is welded to the upper panel 11, and the bottom side of the web baffle 14 is welded to the lower panel 21. The web baffle 14, the vertically arranged upper panel 11, and the horizontally arranged lower panel 21 all intersect at an angle to form a stable angular structure, which is beneficial to improving the overall structural strength of the main tower support and reducing the probability of deformation.

[0025] In this embodiment, the first web plate 12 has a positioning slot 121 on the side away from the web plate baffle 14 for the edge of the bottom plate 31 of the connecting beam steel box body 3 to enter.

[0026] When installing the main tower support, if Figure 4 As shown, the upper support body 1 and the lower support body 2 are fabricated first. After fabrication, the edge of the bottom plate 31 of the combined beam steel box body 3 is inserted into the positioning slot 121 using the positioning slot 121 on the upper support body 1. The weld between the first web plate 12 and the side wall of the beam steel box body 3, and the weld between the Z-shaped edge line of the second web plate 13 and the side wall of the beam steel box body 3 are then welded. The Z-shaped edge line forms the main body of the weld joint between the main tower support and the combined beam steel box body using the first straight segment 13a. The design of the first arc segment 13b and the second arc segment 13c not only expands the spacing at the end of the weld joint, which is beneficial for better stress concentration in the weld and reducing the risk of cracking, but also forms a local double weld, which is beneficial for improving the rigidity of the weld end node. The design of the second straight segment 13d can increase the length of the wide-spacing weld, thereby further improving the rigidity of the weld end node and increasing the connection strength. Then install the lower support body 2, and weld the welds between the first web plate 12 and the lower panel 21, the first web plate 12 and the third web plate 22, and the web plate baffle 14 and the lower panel 21. After that, weld the welds between the third web plate 22 and the fourth web plate 23 and the bottom plate 31 of the connecting beam steel box body 3 to complete the installation.

[0027] The main tower support adopts a split structure. When installing the main tower support, the upper support body 1 can be welded to the steel box body 3 of the connecting beam first, and then the lower support body 2 can be installed. This helps to improve and reduce the installation difficulty of the main tower support. In addition, the upper part of the first web plate 12 uses the upper panel 11 and the second web plate 13 to form a stable support structure. The middle part of the first web plate 12 uses the web plate baffle 14 to reduce deformation. The bottom of the first web plate 12 uses the lower panel 21, the third web plate 22 and the fourth web plate 23 to strengthen the structure. The overall structure is simple and stable and easy to manufacture. Furthermore, the Z-shaped edge design of the second web plate 13 effectively improves the connection strength of the weld end between the second web plate 13 and the steel box body 3 of the structural beam, and reduces the probability of fatigue cracks at both ends of the splice weld between the support and the steel box body.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A main tower support for a 100-meter-long segmental composite beam, installed on the steel box body of the composite beam, characterized in that: include The upper support body includes an upper panel, a first web, a second web, and a web baffle. The first web is vertically arranged. The upper panel and the web baffle are welded to the same side of the first web and are both perpendicular to the first web. The second web includes two web plates, which are symmetrically arranged on both sides of the first web. One side of the web plate is welded perpendicularly to the first web, and the other side is welded to the upper panel. Each web plate has a Z-shaped edge line on the side away from the upper panel for forming a welded joint with the steel box of the composite beam. The lower support body includes a lower panel, a third web plate, and a fourth web plate. The lower panel is located below the first web plate and is vertically welded to the first web plate. The third web plate is located on the side of the first web plate away from the web plate baffle, and the bottom side of the third web plate is welded to the lower panel. The fourth web plate is welded to the side of the third web plate away from the first web plate and is in the same plane as the first web plate. The bottom side of the fourth web plate is vertically welded to the lower panel.

2. The main tower support for the 100-meter large-segment combined beam according to claim 1, characterized in that: The Z-shaped edge line includes a first straight line segment, a first arc segment, a second arc segment, and a second straight line segment connected in sequence; The two ends of the first arc segment are the first end and the second end, respectively. The first end of the first arc segment is connected to the end of the first straight segment away from the first web. The second end of the first arc segment is located on the side of the first end close to the first web and on the side of the first end close to the top panel. The center of the first arc segment is located on the side of the first arc segment away from the first straight segment. The first arc segment and the first straight segment cooperate to form a tongue-shaped protrusion structure. The two ends of the second arc segment are the third end and the fourth end, respectively. The third end of the second arc segment is connected to the second end of the first arc segment. The fourth end of the second arc segment is located on the side of the third end away from the first web plate and on the side of the third end away from the top panel, and on the side of the first end of the first arc segment close to the top panel. The center of the second arc segment is located on the side of the second arc segment away from the first arc segment. The second arc segment and the first arc segment cooperate to form a V-shaped groove. The two ends of the second straight segment are the fifth end and the sixth end, respectively. The fifth end of the second straight segment is connected to the fourth end of the second arc segment. The sixth end of the second straight segment is located on the side of the fifth end away from the first web. The second straight segment is parallel to the first straight segment.

3. The main tower support for the 100-meter large-segment combined beam according to claim 1, characterized in that: The upper panel is vertically arranged, and the web baffle is located below the upper panel and is inclined from top to bottom towards the third web. The top side of the web baffle is welded to the upper panel, and the bottom side of the web baffle is welded to the lower panel.

4. The main tower support for the 100-meter large-segment combined beam according to claim 1, characterized in that: The first web has a positioning slot on the side away from the web baffle for the bottom edge of the connecting beam steel box body to enter.

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