Hoisting point structure and arrangement method of steel box steel truss combined beam

Abstract

This invention provides a lifting point structure and arrangement method for a steel box girder and steel truss composite beam. The lifting point structure includes two spaced-apart channel panels, two main lugs located between the channel panels, and a mounting plate fixed to the main lugs. The channel panels have embedded grooves, and the main lugs and mounting plates have through holes, together forming a placement position to accommodate the crossbeams. The arrangement method includes: determining the projection point of the segment's center of gravity; symmetrically determining the installation center positions of at least two pairs of lifting lugs; installing the lifting point structure at each position, ensuring that its two channel panels are aligned and fixed with the lower chord longitudinal beam of the steel box girder or the web of the lower chord node of the truss; and finally connecting the two crossbeams to the paired lifting point structures via pins to form two lifting point groups. Thus, by precisely positioning and arranging the lifting point structure based on the center of gravity of the steel box girder and steel truss composite beam, the lifting force is directly and efficiently transferred to the main load-bearing components, significantly improving the safety and stability of the lifting operation.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and in particular relates to a suspension point structure and arrangement method for a steel box girder and steel truss composite beam. Background Technology

[0002] In the construction of large bridges, steel box girder composite beams, due to their complex structure and large segmental weight, place extremely high demands on the safety and efficiency of their hoisting. Traditional hoisting points typically employ simple single-ear plate structures, which have limited load-bearing capacity, and their arrangement is often restricted by the position of internal partitions within the beam, making it difficult to achieve a symmetrical and uniform layout. This results in complex, bulky, and cumbersome designs for the upper lifting equipment (such as pulley blocks and distribution beams), with poor versatility. More importantly, the load transfer path of traditional hoisting points is not direct, which can easily cause local deformation or even tearing of the top plate of the steel box girder, posing safety hazards. Therefore, there is an urgent need for a specialized hoisting point structure and arrangement method with stronger load-bearing capacity, a more direct force transfer path, and the ability to achieve stable four-point hoisting while simplifying the lifting equipment. Summary of the Invention

[0003] In view of this, the purpose of this invention is to propose a lifting point structure and arrangement method for a steel box girder composite beam. This method is used to solve the problems of insufficient load-bearing capacity, indirect force transmission, and unsatisfactory arrangement due to internal structural limitations in the existing lifting point structure, as well as the resulting complex lifting equipment and low lifting safety, so as to at least partially solve the problems in the related technologies.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows: To achieve the above objectives, a first aspect of this disclosure provides a suspension point structure for a steel box girder composite beam, comprising: a channel-shaped panel, a main lug plate, and a backing plate; The number of the grooved panels is two, the two grooved panels are spaced apart, and each grooved panel is provided with an embedding groove for embedding a crossbeam. The number of the main ear plates is two, the two main ear plates are spaced apart along the length direction of the grooved panels and located between the two grooved panels. The two main ear plates and the two grooved panels together form a placement position for placing part of the crossbeam. Each main ear plate is fixedly connected to the plate, and both the main ear plate and the plate are provided with through holes for the pin shaft to pass through.

[0005] Furthermore, a reinforcing plate is fixedly connected to one end of the patch plate away from the main ear plate, and the reinforcing plate is provided with the through hole.

[0006] Furthermore, two stiffening plates are fixedly connected to one end of the patch plate away from the main ear plate, and the reinforcing plate is located between the two stiffening plates.

[0007] Furthermore, the stiffening plate is fixedly connected to the connection between the channel panel and the steel box girder.

[0008] Furthermore, the stiffening plate is fixedly connected to the connection between the grooved panel and the truss node.

[0009] A second aspect of this disclosure also provides an arrangement method for arranging the suspension point structure described in the first aspect, the arrangement method comprising the following steps: S1. On the top surface of a segment of the steel box girder, determine the projection point of the centroid of the segment onto the top surface. S2. Using the center of gravity projection point as a reference, along the longitudinal center line of the segment, determine at least two pairs of lifting lug installation center positions symmetrically on both sides of the center of gravity projection point. S3. At the center position of each of the lifting lugs, the lifting point structure is arranged, and during the arrangement, it is ensured that the two grooved panels of the lifting point structure are aligned with and fixedly connected to the lower chord longitudinal beam inside the steel box girder or aligned with and fixedly connected to the lower chord node web of the truss. S4. Connect the two crossbeams to the paired lifting point structures via pins to form two lifting point groups.

[0010] Furthermore, the upper surfaces of the two crossbeams are detachably connected to two longitudinal beams, which are spaced apart along the length of the crossbeams.

[0011] Furthermore, both the crossbeam and the longitudinal beam are provided with lifting lugs, which are used to connect lifting ropes.

[0012] Furthermore, a compensation pad is provided at the connection between the crossbeam and the longitudinal beam.

[0013] Furthermore, in step S3, the fixed connection of the grooved panel is welding; Before welding the channel panel, the lower contour of the channel panel needs to be pre-processed so that the lower contour of the channel panel matches the surface of the steel box girder or truss to be welded.

[0014] Through the above technical solution, the lifting point structure uses two spaced-apart channel panels and two main lugs to form a placement position, allowing the crossbeam to be stably embedded and connected via through holes in the main lugs and the panel. Simultaneously, reinforcing plates with through holes are added to the ends of the panel, effectively dispersing the concentrated stress on the pin and preventing deformation of the hole walls. Stiffening plates located on both sides of the reinforcing plates and at the connection points of the channel panels further enhance the overall strength of the lifting point structure, preventing instability and making load transfer more reliable. The arrangement method, by first determining the center of gravity and then symmetrically arranging the installation centers, ensures balanced stress distribution across the four lifting point structures. During installation, each lifting point structure requires that the two channel panels be precisely aligned and fixed to the lower chord longitudinal beam or the web of the lower chord node. This allows the lifting force to be directly transferred to the main load-bearing frame of the steel box girder through the channel panels, improving lifting safety. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure provided in the exemplary embodiment of this disclosure, in which the lifting point structure is set on the composite beam of steel box girder; Figure 2 This is a schematic diagram of the structure of the crossbeam and compensation pad provided in an exemplary embodiment of this disclosure; Figure 3 This is a front view of the suspension point structure connected to the lower chord longitudinal beam provided in an exemplary embodiment of this disclosure; Figure 4 This is a side view of the suspension point structure connected to the lower chord longitudinal beam provided in an exemplary embodiment of this disclosure. Figure 5 This is a front view of the suspension point structure connected to the web of the lower chord node provided in an exemplary embodiment of this disclosure. Figure 6 This is a side view of the suspension point structure connected to the web of the lower chord node provided in an exemplary embodiment of this disclosure. Figure 7 This is a schematic diagram of the structure of the grooved panel of the corresponding truss provided in an exemplary embodiment of this disclosure; Figure 8 This is a schematic diagram of the structure of the grooved panel corresponding to the steel box girder provided in the exemplary embodiment of this disclosure.

[0016] Figure 9 This is a flowchart illustrating the arrangement method provided in an exemplary embodiment of this disclosure.

[0017] Explanation of reference numerals in the attached figures: 1. Channel panel; 2. Main lug plate; 3. Panel; 4. Reinforcing plate; 5. Stiffening plate; 6. Crossbeam; 7. Lifting lug; 8. Compensating pad; 9. Steel box girder; 901. Lower chord longitudinal beam; 10. Truss; 1001. Lower chord node web; 11. Center of gravity. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] In the specific embodiments provided in this disclosure, the first aspect of this disclosure provides a suspension point structure for a steel box girder and steel truss composite beam, with reference to... Figures 1 to 8As shown, the suspension point structure includes: a channel-shaped panel 1, main ear plates 2, and a mounting plate 3. There are two channel-shaped panels 1, spaced apart. Each channel-shaped panel 1 has an embedding groove for embedding a crossbeam 6. The two main ear plates 2 are spaced apart along the length of the channel-shaped panels 1, and together with the two channel-shaped panels 1, they enclose a placement position, into which part of the crossbeam 6 can be embedded. Simultaneously, a mounting plate 3 is fixedly connected to the outer side of each main ear plate 2 (the side facing away from the other main ear plate 2). Corresponding coaxial through holes are formed on the main ear plates 2 and the mounting plate 3. The crossbeam 6 has a through hole corresponding to the through hole. A pin can limit the crossbeam 6 through the through hole and the through hole, allowing it to be securely connected to the suspension point structure.

[0023] In some implementations, reference Figure 3 and Figure 5 As shown, to enhance structural strength, a reinforcing plate 4 is fixedly connected to the end of the mounting plate 3 facing away from the main ear plate 2. The reinforcing plate 4 also has through holes, and the axes of the through holes of the main ear plate 2, the mounting plate 3, and the reinforcing plate 4 are collinear. Two stiffening plates 5 are also provided on both sides of the reinforcing plate 4, which can strengthen the area where the mounting plate 3 and the reinforcing plate 4 are located (the area around the pin shaft).

[0024] In addition, stiffening plates 5 are also provided at the welding points of the channel panel 1 and the top plate of the steel box girder 9, or at the welding points of the channel panel 1 and the lower chord node of the truss 10, to enhance the rigidity and stability of the connection.

[0025] Based on the above technical solution, the second aspect of this disclosure provides a method for arranging the suspension point structure of the first aspect, with reference to... Figure 9As shown, the arrangement method includes the following steps: First, on the top surface of the steel box girder segment to be hoisted, the projection point of the segment's center of gravity 11 on the top surface is determined by calculation and measurement. Using this projection point as a reference, along the longitudinal centerline of the segment, two pairs (four in total) of lifting lugs 7 are symmetrically determined on both sides of this point. Subsequently, the hoisting point structure is installed at each determined center position. When the hoisting point structure is located in the area of ​​the steel box girder 9, it is necessary to ensure that the lower edges of the two channel panels 1 of the hoisting point structure are precisely aligned with the lower chord longitudinal beam 901 inside the steel box girder 9 directly below it; when the hoisting point is located in the node area of ​​the truss 10, it is necessary to ensure that the two channel panels 1 are aligned with the lower chord node web plate 1001 of the truss 10. After alignment, the channel panels 1 are welded and fixed (the lower contour of the channel panels 1 can be pre-processed before welding to ensure a close fit). After all four lifting point structures are installed, the two crossbeams 6 are placed in the positions of the two pairs of lifting point structures, and the crossbeams 6 are connected to the lifting point structures using pins passing through the through holes of the main lug plate 2, the mounting plate 3, and the reinforcing plate 4, thus forming two independent lifting point groups. To accommodate the height difference between the steel box girder 9 and the truss 10 node, a compensation pad 8 can be installed on the upper surface of the crossbeam 6 located in the area of ​​the steel box girder 9. Finally, two longitudinal beams are installed on the two crossbeams 6. Both the crossbeams 6 and the longitudinal beams are equipped with lifting lugs 7, which are used to connect the crane hook, allowing for overall lifting.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A suspension point structure for a steel box girder and steel truss composite beam, characterized in that, include: The grooved panel (1), the main ear plate (2), and the mounting plate (3); The number of the grooved panels (1) is two, the two grooved panels (1) are spaced apart and each grooved panel (1) is provided with an embedding groove for embedding the crossbeam (6). The number of the main ear plates (2) is two, the two main ear plates (2) are spaced apart along the length direction of the grooved panels (1) and located between the two grooved panels (1). The two main ear plates (2) and the two grooved panels (1) together form a placement position for placing part of the crossbeam (6). Each main ear plate (2) is fixedly connected with the patch plate (3). Both the main ear plate (2) and the patch plate (3) are provided with through holes for the pin shaft to pass through.

2. The suspension point structure of a steel box girder and steel truss composite beam according to claim 1, characterized in that: The end of the mounting plate (3) facing away from the main ear plate (2) is fixedly connected to a reinforcing plate (4), and the reinforcing plate (4) is provided with the through hole.

3. The suspension point structure of a steel box girder and steel truss composite beam according to claim 2, characterized in that: The end of the plate (3) facing away from the main ear plate (2) is fixedly connected to two stiffening plates (5), and the reinforcing plate (4) is located between the two stiffening plates (5).

4. The suspension point structure of a steel box girder and steel truss composite beam according to claim 3, characterized in that: The stiffening plate (5) is fixedly connected to the connection between the channel panel (1) and the steel box girder (9).

5. The suspension point structure of a steel box girder and steel truss composite beam according to claim 3, characterized in that: The stiffening plate (5) is fixedly connected to the connection between the grooved panel (1) and the truss (10) node.

6. A method for arranging a suspension point structure as described in any one of claims 1-5, characterized in that, The arrangement method includes the following steps: S1. On the top surface of the segment of the steel box girder, determine the projection point of the centroid (11) of the segment on the top surface; S2. Using the center of gravity projection point as a reference, along the longitudinal center line of the segment, at least two pairs of lifting lugs (7) are symmetrically determined on both sides of the center of gravity projection point to determine the installation center position. S3. At the installation center position of each of the lifting lugs (7), the lifting point structure is arranged. When arranging, ensure that the two grooved panels (1) of the lifting point structure are aligned and fixedly connected with the lower chord longitudinal beam (901) inside the steel box girder (9) or aligned and fixedly connected with the lower chord node web plate (1001) of the truss (10). S4. Connect the two crossbeams (6) to the paired lifting point structures via pins to form two lifting point groups.

7. The arrangement method according to claim 6, characterized in that: The upper surfaces of the two crossbeams (6) are detachably connected to two longitudinal beams, which are spaced apart along the length of the crossbeams (6).

8. The arrangement method according to claim 7, characterized in that: Both the crossbeam (6) and the longitudinal beam are provided with lifting lugs (7), which are used to connect the lifting ropes.

9. The arrangement method according to claim 8, characterized in that: The connection between the crossbeam (6) and the longitudinal beam is provided with a compensating pad (8).

10. The arrangement method according to claim 7, characterized in that: In step S3, the fixed connection of the grooved panel (1) is welding; Before welding the channel panel (1), the lower contour of the channel panel (1) needs to be pre-processed so that the lower contour of the channel panel (1) matches the welding surface of the steel box girder (9) or truss (10).

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