Flexible guide beam and guide frame system applied to large-span bridge incremental launching construction

The flexible guide beam and guide frame system solves the limitation of temporary piers in the jacking of large-span bridges, realizes the jacking of bridges with larger spans, saves materials and space, and has economic and promotion value.

CN223410068UActive Publication Date: 2025-10-03XIAN MUNICIPAL ENG (GRP) CO LTD +2
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Patent Information

Application Number
CN202422564820.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2025-10-03
Estimated Expiration
2034-10-23

AI Technical Summary

Technical Problem

Existing jacking construction technology is limited by the span of the guide beam in the construction of long-span bridges, resulting in the need to build temporary piers, which occupy the space under the bridge and restrict the span expansion.

Method used

A flexible guide beam and guide frame system is designed, including a cable system unit, a steel support unit and a bottom rotation unit. The flexible guide beam unit is used to achieve large-span jacking and avoid the construction of temporary piers.

Benefits of technology

It realizes the jacking of bridges with larger spans, saves space under the bridge, reduces material consumption, avoids the problem of traditional guide beams falling, and has better economy and promotion value.

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Abstract

The utility model relates to the technical field of bridge engineering, in particular to a flexible guide beam and guide frame system applied to large-span bridge incremental launching construction, which comprises an inhaul cable system unit, a profile steel support unit, a bottom rotating unit and a flexible guide beam unit, one end of the flexible guide beam unit is connected with the bridge pier, the other end of the flexible guide beam unit is connected with the upper end of the profile steel support unit, the lower end of the profile steel support unit is hinged to the bottom rotating unit, the bottom rotating unit is arranged on a bridge pier bearing platform below the bridge pier, and the top end of the profile steel support unit supports the flexible guide beam unit. The guide beam has the advantages that the rigidity of the guide beam is reduced, materials are saved, and the problem that a traditional guide beam is prone to head planting is solved due to the guide frame; the lower deflection of the guide beam is controlled, and then the guide beam is connected with the guide frame rotating system, so that the spanning range is larger, the space under the bridge is saved, the arrangement of buttresses is avoided, and better economical efficiency and popularization value are achieved.
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Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a flexible guide beam and guide frame system used in the jacking construction of a large-span bridge. Background Art

[0002] The jacking construction technology has been developed in the industry for more than 70 years. Because it does not occupy extra space under the bridge, it is widely used in crossing complex environments such as roads, railways, and waterways.

[0003] The guide beam dragging method, the steel guide beam combined with temporary pier jacking method, and the walking multi-point jacking method are common solutions in the industry. They all inevitably require the appearance of guide beams, temporary piers and other structures, and the guide beam span is generally limited to no more than 0.6L. Under certain conditions, this also restricts the development of jacking technology. Summary of the Invention

[0004] The purpose of this utility model is to provide a flexible guide beam and guide frame system for use in the jacking construction of large-span bridges based on the above-mentioned deficiencies of the existing technology. By designing a flexible steel guide beam and a temporary guide frame system, a larger span jacking distance can be achieved without building temporary piers.

[0005] The purpose of this utility model is achieved by the following technical solutions:

[0006] A flexible guide beam and guide frame system used for jacking construction of large-span bridges is characterized by comprising a cable system unit, a steel support unit, a bottom rotation unit and a flexible guide beam unit, wherein one end of the cable system unit is connected to the pier body of the pier, and the other end is connected to the upper end of the steel support unit, the lower end of the steel support unit is hinged to the bottom rotation unit, the bottom rotation unit is arranged on the pier cap below the pier, and the top end of the steel support unit supports the flexible guide beam unit.

[0007] The cable system unit includes a steel cable, which is buried in a pipe in the pier body. One end of the steel cable is connected to the intelligent tensioning system, and the other end is connected to the steel support unit through a cable anchoring plate.

[0008] The pipes in the pier body are arranged in a fan-shaped pre-buried pipe arrangement.

[0009] The steel support unit includes a steel column and a steel support plate. The steel support plate is arranged at the top position of the steel column. The flexible guide beam unit is supported above the steel support plate. The lower end of the steel column is hinged to the bottom rotating unit. The steel column is provided with a fan-shaped cable hole for matching and installing the steel cable in the cable system unit.

[0010] A rubber pad is provided above the steel supporting plate; and reserved bolt holes are provided on the steel supporting plate and the rubber pad.

[0011] The bridge pier is provided with the steel support unit, which includes 2 or more steel columns. The specific number can be adjusted according to the width of the bridge. Horizontal connecting reinforcement structures and diagonal braces are provided between the columns. The bottoms of the steel columns are respectively connected to their own independent bottom rotation units.

[0012] The bottom rotating unit includes a steel plate, a semi-barreled lower steel plate arranged above the steel plate, and a semi-barreled upper steel plate arranged at the bottom of the steel column of the steel bracket unit. The semi-barreled upper steel plate surrounds the periphery of the semi-barreled lower steel plate and the two form a sliding fit.

[0013] The semi-barrel-shaped upper steel plate and the semi-barrel-shaped lower steel plate are respectively provided with reserved bolt holes.

[0014] The flexible guide beam unit adopts a low-height I-beam structure. When multiple I-beams are used, adjacent I-beams are connected to form an integral structure using spacer beams.

[0015] The advantages of the utility model are: reducing the rigidity of the guide beam, saving materials, and having a guide frame to avoid the head-diving problem that is easy to occur in traditional guide beams; by controlling the deflection of the guide beam and then connecting it with the guide frame rotation system, the span range is expanded, saving space under the bridge, avoiding the establishment of piers, and having better economy and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view schematic diagram of the utility model;

[0017] Figure 2 It is a front view schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the cable unit in the utility model;

[0019] Figure 4 This is a schematic diagram of the bracket unit in the utility model;

[0020] Figure 5 This is a schematic diagram of the bottom rotating unit in the present utility model;

[0021] Figure 6 This is a structural diagram of embodiment 1 provided by the present utility model. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0023] like Figure 1-6 As shown, the marks in the figure respectively represent: cable system unit 1, steel support unit 2, bottom rotation unit 3, flexible guide beam unit 4;

[0024] Steel cables 11, fan-shaped embedded pipes 12, intelligent tensioning system 13, bridge piers 14;

[0025] Steel column 21, cable anchoring support plate 22, steel support plate 23, rubber pad 24, reserved bolt hole 25, fan-shaped cable hole 26, steel flat joint 27;

[0026] Steel plate 31, semi-barrel-shaped lower steel plate 32, semi-barrel-shaped upper steel plate 33, upper steel plate shoe 34, and reserved bolt holes 35 in the upper and lower steel plates.

[0027] Example: Figures 1 to 6 As shown, it includes four units, the first unit is the steel cable pulling unit, the second is the steel support unit, the third is the support bottom rotation unit, and the fourth is the large-span flexible guide beam unit.

[0028] The cable system unit 1 includes a steel cable 11 and an intelligent tensioning system 13 . The steel cable 11 is pre-buried in a pier pipe of a bridge pier 14 . The intelligent tensioning system 13 is connected to the steel cable 11 .

[0029] In this embodiment, the angle between the steel cable 11 and the horizontal plane is about 30 degrees, and the embedded pipe is a fan-shaped embedded pipe 12, and the fan-shaped angle of the fan-shaped embedded pipe 12 is greater than the running angle of the steel cable 11.

[0030] The intelligent tensioning system uses the bridge pier 14 as a reaction seat, and the power system adopts intelligent control.

[0031] The steel support unit 2 consists of steel columns 21, horizontal and diagonal braces, cable anchoring brackets 22, and steel brackets 23. Each pier 14 is equipped with an independent steel column 21. Above each steel column 21 is a cable anchoring bracket 22 for secure connection to the steel cables 11. Above each cable anchoring bracket 22 is a steel bracket 23. To improve the structural performance of the steel columns 21, an additional steel column 21 is installed between the steel columns 21 of two adjacent piers 14. This steel column 21 is connected to the steel columns on either side via horizontal and diagonal braces to form the integral structure.

[0032] The steel columns 21 can be box-shaped or round, and can be arranged in two, three, or even more shapes as needed. Each steel column 21 can also be pre-buried with a fan-shaped pre-buried pipe 12 that matches the steel cable 11, with its angle corresponding to the travel angle of the steel cable 11. The lower part of the steel column 21 is connected to the bottom rotating unit.

[0033] The top of the steel column 21 is supported by a combination of a steel support plate 23 and a rubber pad 24. Bolt holes are provided in the steel support plate 23 and the rubber pad 24 for connecting to the flexible guide beam unit 4. The rubber pad 24 is 5-10 cm thick and has a certain degree of deformation, which can coordinate the forces on multiple brackets.

[0034] The bottom rotating unit 3 includes a steel plate 31 embedded in the pier cap, and also includes two semi-barreled curved steel plates that fit each other, wherein the semi-barreled upper steel plate 33 is welded to the bottom of the steel column 21, and the semi-barreled lower steel plate 32 is welded to the steel plate 31. Bolt holes 35 for locking the upper and lower steel plates are reserved between the semi-barreled upper steel plate 33 and the semi-barreled lower steel plate 32. At the same time, an upper steel plate boot 34 is provided on the semi-barreled upper steel plate 33. The angle of the semi-barreled lower steel plate 32 is 180 degrees, and the corresponding angle of the semi-barreled upper steel plate 33 is 150 degrees, which corresponds to the angle of the steel cable 11 and the running angle of the steel column 21.

[0035] In this embodiment, the space between the upper and lower semi-barrel-shaped steel plates should be polished and greased to facilitate rotation. Before and after construction, bolts can be used to temporarily lock the two semi-barrel-shaped steel plates together to prevent premature rotation. To ensure that the upper and lower semi-barrel-shaped steel plates can be connected and aligned, the reserved bolt holes 35 in the upper and lower steel plates can be narrow holes with a certain adjustment range, or multiple bolt holes can be provided at intervals.

[0036] In this embodiment, the lengths of the upper and lower semi-barrel-shaped steel plates correspond to the width of the steel support pillar 21 and can also be appropriately lengthened. The actual length can be calculated based on the force requirements.

[0037] The flexible guide beam unit 4 can adopt a low-height I-beam structure, and can adopt 2, 3, etc., with spaced cross-connections in the middle. Compared with traditional guide beams, it has low rigidity, large length, high flexibility, and saves materials.

[0038] During the construction process, the flexible guide beam structure 4 will deflect downward as the jacking progresses, and the deflection is usually allowed to be L / 30-L / 20 of the jacking span. When it reaches the position of the steel support unit 2, it is connected to the steel support unit 2, and then the cable system unit 1 starts working to perform the structural system conversion, dragging the guide beam and the main structure to the pier top, completing the entire jacking process.

[0039] When applied, this embodiment includes the following steps:

[0040] During the pier construction phase, fan-shaped pre-embedded pipes 12 are pre-embedded in pier 14. The angle of these pre-embedded pipes is determined based on the travel angle of the lifting cables. The profiled steel plate 31 of the bottom rotating unit 3 is pre-embedded in the pier cap. The position of this profiled steel plate 31 is determined based on the pre-determined position of the profiled steel columns 21.

[0041] The factory manufactures the steel column 21, which can adopt a rectangular cross-section. At the same time, a fan-shaped cable hole 26 is preset at the corresponding position on the upper part. The fan-shaped cable hole 26 is located at the upper part of the steel column 21 so that when the column is upright, it should be on the same horizontal line as the fan-shaped embedded pipe 12 of the pier 14.

[0042] Fabricate a semi-barrel-shaped upper steel plate 33 and a semi-barrel-shaped lower steel plate 32. The inner diameter of the semi-barrel-shaped upper steel plate 33 should be 1mm larger than the outer diameter of the semi-barrel-shaped lower steel plate 32, and the corresponding inner and outer surfaces should be polished smooth. The curved surface of the semi-barrel-shaped lower steel plate 32 is 180 degrees, while the curved surface of the semi-barrel-shaped upper steel plate 33 is generally 150 degrees. These angles should complement the initial inclination of the steel column 21. This ensures that after rotation, the upper steel plate shoe 34 of the semi-barrel-shaped upper steel plate 33 can rest on the steel backing plate 31.

[0043] Between the semi-barreled upper steel plate 33 and the semi-barreled lower steel plate 32, a plurality of upper and lower steel plate reserved bolt holes 35 are reserved to lock the upper and lower semi-barreled steel plates under the initial and final states to prevent displacement. The outside of the semi-barreled upper steel plate 33 and the section steel column 21 are welded.

[0044] The steel support plate 23 is made of steel plate and welded to the top of the steel column 21. It can also be connected with bolts. The rubber pad 24 is pasted on the steel support plate 23. At the same time, reserved bolt holes 25 are set on the steel support plate 23 and the rubber pad 24 for temporary overlap and fixation with the flexible guide beam unit 4.

[0045] On site, the steel support unit 2 and the bottom rotating unit 3 are temporarily fixed together through the bolt holes 35 reserved in the upper and lower steel plates, and then the steel parallel joint 27 of the support is welded, or welding can be done in advance.

[0046] The cable system unit 1 and the steel support unit 2 are connected through the fan-shaped cable hole 26 and the fan-shaped embedded pipe 12. Then the temporary bolts of the bottom rotating unit 3 can be loosened, and butter can be applied between the semi-barreled upper steel plate 33 and the semi-barreled lower steel plate 32 to pre-tension the steel cable 11.

[0047] like Figure 6 As shown, when the pushing work begins, the flexible guide beam unit 4 can be made of ordinary I-beam. After being pushed to a certain distance, the guide beam head will deflect downward, and the deflection is controlled at L / 20-L / 30 of the pushing span, which is within the controllable and allowable range of the project.

[0048] When the flexible guide beam unit 4 reaches the steel support unit 2, the steel support unit 2 starts to work, and the steel column 21 is pulled to rotate by the steel cable 11, and the flexible guide beam unit 4 is combined with the rubber pad 24 and the steel support plate 23, and partially fixed with bolts; then the steel column 21 is continued to be pulled until the steel column 21 is pulled vertically. At this time, the flexible guide beam unit 4 also reaches the pier top position, thereby completing the structural system conversion, and this construction process is completed.

[0049] When this embodiment is implemented, the material and cross-section may also be changed in actual engineering.

[0050] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A flexible guide beam and guide frame system used in the jacking construction of a long-span bridge, characterized by: It includes a cable system unit, a steel support unit, a bottom rotation unit and a flexible guide beam unit, wherein one end of the cable system unit is connected to the pier body of the pier, and the other end is connected to the upper end of the steel support unit, the lower end of the steel support unit is hinged to the bottom rotation unit, and the bottom rotation unit is arranged on the pier base below the pier, and the top end of the steel support unit supports the flexible guide beam unit.

2. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 1 is characterized by: The cable system unit includes a steel cable, which is buried in a pipe in the pier body. One end of the steel cable is connected to the intelligent tensioning system, and the other end is connected to the steel support unit through a cable anchoring plate.

3. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 2 is characterized by: The pipes in the pier body are arranged in a fan-shaped pre-buried pipe arrangement.

4. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 1 is characterized by: The steel support unit includes a steel column and a steel support plate. The steel support plate is arranged at the top position of the steel column. The flexible guide beam unit is supported above the steel support plate. The lower end of the steel column is hinged to the bottom rotating unit. The steel column is provided with a fan-shaped cable hole for matching and installing the steel cable in the cable system unit.

5. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 4 is characterized in that: A rubber pad is provided above the steel supporting plate; and reserved bolt holes are provided on the steel supporting plate and the rubber pad.

6. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 1 is characterized by: The bridge pier is provided with the steel support unit, which includes two or more steel columns. Transverse connection reinforcement structure horizontal links and diagonal braces are provided between the steel columns. The bottoms of the steel columns are respectively connected to their own independent bottom rotation units.

7. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 1 is characterized by: The bottom rotating unit includes a steel plate, a semi-barreled lower steel plate arranged above the steel plate, and a semi-barreled upper steel plate arranged at the bottom of the steel column of the steel bracket unit. The semi-barreled upper steel plate surrounds the periphery of the semi-barreled lower steel plate and the two form a sliding fit.

8. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 7, characterized in that: The semi-barrel-shaped upper steel plate and the semi-barrel-shaped lower steel plate are respectively provided with reserved bolt holes.

9. The flexible guide beam and guide frame system for jacking construction of a long-span bridge according to claim 1, characterized in that: The flexible guide beam unit adopts a low-height I-beam structure. When multiple I-beams are used, adjacent I-beams are connected to form an integral structure using spacer beams.