High rise-span ratio ultrahigh steel box main arch mid-span low-position assembly hydraulic synchronous lifting closure construction structure

Abstract

The utility model relates to a high rise-span ratio ultrahigh steel box main arch mid-span low-position assembly hydraulic synchronous lifting closure construction structure. According to the scheme, the construction structure comprises the steps of building of a support system, building of a lifting system, assembly of arch ribs, installation of a sling system, lifting operation and closure operation. According to the utility model, the arch rib structure, the bracket and the lifting and sling system are organically combined, so that the rapid assembly and lifting of the arch rib are realized; the hydraulic lifting technology accelerates the construction progress, manual errors are reduced, and the precision is improved; multiple safety measures ensure construction stability and reduce accident risks; the system adapts to a complex environment, flexible adjustment is achieved through low-position splicing, and the application range is widened; the stability of the arch rib is ensured through the combination of the lifting support and the sling, and the controllability of closure is enhanced through the temporary closure frame.

Description

Technical Field

[0001] This utility model relates to bridge engineering construction technology, particularly to the hydraulic synchronous lifting, assembly and closure process for large-span steel box arch bridges, aiming to improve construction efficiency and safety. Background Technology

[0002] In modern bridge engineering, especially in the construction of long-span bridges, the efficient and safe assembly and lifting of arch ribs has become a crucial factor affecting construction efficiency and safety. Due to their complex structures and high construction difficulty, long-span bridges typically require advanced construction technologies and equipment to meet design requirements and construction standards. Currently, widely used bridge construction technologies mainly include suspension methods, incremental launching methods, assembly methods, and hydraulic lifting technology. However, each of these methods has certain limitations:

[0003] (1) Traditional suspension methods require a large number of temporary support systems to ensure the stability and safety of the structure during construction. This not only increases the complexity and cost of construction, but also requires a high degree of spatial flexibility in the layout of the construction site, limiting its application in densely populated urban areas. Therefore, suspension methods are not always the optimal choice for the construction of long-span bridges.

[0004] (2) The incremental launching method is widely used in long-span bridges, but due to its extremely high requirements for construction precision, structural deformation or tilting are prone to occur during construction. Once a problem occurs, it often leads to construction delays and additional costs. In addition, the incremental launching method has relatively strict requirements on the construction environment of bridges and is difficult to adapt to complex terrain changes.

[0005] (3) As a common bridge construction method, the assembly method has improved construction efficiency to a certain extent. However, in practical applications, the accuracy of the connection during the assembly process has always been a problem. Especially in long-span bridges, the assembly and connection of the arch ribs require extremely high precision. Any slight error may affect the stability and safety of the structure, which brings considerable challenges to the construction.

[0006] (4) Hydraulic lifting technology is gradually being applied in bridge construction, providing powerful lifting capacity and precise control. However, its application in actual engineering still faces some challenges. Existing hydraulic systems often require complex devices, which increases the complexity and cost of construction. Moreover, the stability and reliability of the hydraulic system directly affect the safety of lifting operations; hydraulic failures may lead to serious construction accidents.

[0007] (5) In the design of sling systems, although various sling structures and connection methods have been proposed, how to effectively maintain the balance of the slings and ensure the uniform distribution of the load in actual construction remains a technical challenge. Existing sling systems often lack the necessary balance design during the lifting process, which may lead to unbalanced loads on the structure during construction, thereby affecting the safety and stability of the overall construction.

[0008] In conclusion, while current bridge construction technologies meet the requirements for long-span bridges to a certain extent, there are still many shortcomings in terms of construction efficiency, safety, and economy. Therefore, in-depth research and innovation in the construction technology of long-span bridges, especially combining hydraulic lifting technology, cable system optimization, and arch rib structure design, will provide new ideas and solutions for the future development of bridge engineering. Utility Model Content

[0009] The purpose of this utility model is to address the aforementioned problems in the existing technology by providing a hydraulic synchronous lifting and closure construction structure for the mid-span low-position assembly of the ultra-high steel box girder main arch with a large span-to-span ratio.

[0010] To achieve the above-mentioned application objectives, this utility model adopts the following technical solution: The hydraulic synchronous lifting and closure construction structure for the mid-span low-position assembly of the large span-to-span ratio ultra-high steel box main arch includes an arch rib structure, a support system, a lifting system, a suspension cable system, and a closure system;

[0011] The arch rib structure includes the arch foot rib and the middle section arch rib;

[0012] The support system is arranged on the top surface of the installed steel box girder, including arch foot assembly support and intermediate assembly support; the arch foot assembly support is used to support the arch foot ribs, and the arch foot assembly supports are connected as one unit by arch foot cross braces; the intermediate assembly support is used to support the middle section arch ribs during the assembly process.

[0013] The lifting system has at least two parts. The lifting system includes a lifting support, which has a lifting support base. The lower part of the lifting support base is connected to a bottom steel pipe pile. The top of the bottom steel pipe pile has a distribution beam and a support plate. The lower part of the bottom steel pipe pile is anchored by a pile cap. The lifting support has a built-in lifting anchor box. The top of the lifting support has a top plate. Lifting jacks are installed on the top plate. The lifting jacks drive the lifting anchor box to slide up and down through lifting cables.

[0014] The sling system has at least two parts. The sling system includes a balance beam, which is installed on the lifting anchor box of the lifting support. The upper part of the balance beam has a balance sling and a balance main cable. The middle part of the balance main cable is connected to the lifting cable. The lower part of the balance beam has a connecting sling. The lower end of the connecting sling is connected to the end of the middle arch rib. The connecting sling transfers the load of the middle arch rib to the balance beam, and the balance beam transfers the load to the lifting anchor box.

[0015] The closure system is installed on the inner end of the arch foot assembly support, including a temporary closure frame. The temporary closure frame has a temporary bottom support. The bottom of the temporary closure frame is movably installed on the arch foot assembly support by a temporary fixing rod, and the top of the temporary closure frame is hinged to the arch foot assembly support by a hinge shaft.

[0016] Furthermore, the intermediate assembly supports are connected as a whole by arched cross braces.

[0017] Furthermore, the balancing main cable is umbrella-shaped.

[0018] Furthermore, the connecting slings include a first sling and a second sling.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) This utility model organically combines the arch rib structure, support system, lifting system and sling system, which can realize the rapid assembly and lifting of the arch rib.

[0021] 2) The application of hydraulic lifting technology not only speeds up the construction progress, but also effectively reduces the errors caused by manual operation and improves the overall construction accuracy.

[0022] 3) Multiple safety measures have been incorporated, including the secure installation of the anchor box, the setting of the balancing slings, and the design of the temporary closure frame. These designs can effectively distribute the load, ensure the stability of the structure during construction, and reduce the risk of construction accidents caused by unexpected situations.

[0023] 4) In complex terrain or urban environments, traditional construction methods are often limited, while this system can adapt to various construction environments through low-level assembly. The flexible arrangement of the support system allows the construction to be adjusted according to site conditions, ensuring the smooth progress of construction.

[0024] 5) The combination of lifting support and sling system can largely meet the construction needs of different bridge structures and broaden its application scope.

[0025] 6) The temporary closure frame enhances the controllability during the closure process, ensuring accurate docking and connection of each component. This high degree of controllability provides a good foundation for subsequent closure operations. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the support system installation.

[0028] Figure 2 A schematic diagram of the assembly of the arch foot and arch rib;

[0029] Figure 3 This is a schematic diagram of the assembly of the middle arch rib;

[0030] Figure 4 To illustrate the system installation diagram;

[0031] Figure 5 To improve the system cross-sectional view;

[0032] Figure 6 A schematic diagram of the sling system installation;

[0033] Figure 7 This is a schematic diagram of the lifting of the middle section arch rib;

[0034] Figure 8 Installation diagram of the closure system;

[0035] Figure 9 This is a schematic diagram of the closure state.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] In the diagram: 1. Steel box girder; 2. Arch foot cross brace; 3. Arch foot rib; 4. Middle section arch rib; 5. Arch foot assembly bracket; 6. Arch frame cross brace; 7. Foot brace; 8. Intermediate assembly bracket; 9. Tie steel strand; 10. Pier; 11. Bottom steel pipe pile; 12. Distribution beam; 13. Support plate; 14. Lifting bracket; 15. Lifting bracket base; 16. Lifting anchor box; 17. Lifting cable; 18. Connecting sling; 19. Main balancing cable; 20. Balancing beam; 21. Balancing sling; 22. Top plate; 23. Lifting jack; 24. Temporary bottom support; 25. Hinge shaft; 26. Adjustable pad; 27. Temporary closure frame; 28. Anchor bolt; 29. ​​First section sling; 30. Second section sling; 31. Temporary fixing rod. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0039] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0040] Example 1

[0041] Please see Figure 1-9 As shown in the figure, this embodiment provides a hydraulic synchronous lifting and closure structure for the mid-span low-position assembly of the large span-to-span ratio ultra-high steel box main arch, including an arch rib structure, a support system, a lifting system, a suspension cable system, and a closure system.

[0042] The arch rib structure includes the arch foot rib 3 and the middle section arch rib 4.

[0043] The support system is arranged on the top surface of the installed steel box girder 1, including arch foot assembly support 5 and intermediate assembly support 8; the arch foot assembly support 5 is used to support the arch foot rib 3, and the arch foot assembly supports 5 are connected into one unit by arch foot cross bracing 2; the intermediate assembly support 8 is used to support the middle section arch rib 4 during the assembly process, and the intermediate assembly supports 8 are connected into one unit by arch frame cross bracing 6.

[0044] The lifting system has at least two parts. The lifting system includes a lifting support 14, which has a lifting support base 15. The lower part of the lifting support base 15 is connected to a bottom steel pipe pile 11. The top of the bottom steel pipe pile 11 has a distribution beam 12 and a support plate 13. The lower part of the bottom steel pipe pile 11 is anchored by a pile cap 10. The lifting support 14 has a built-in lifting anchor box 16. The top of the lifting support 14 has a top plate 22. A lifting jack 23 is installed on the top plate 22. The lifting jack 23 drives the lifting anchor box 16 to slide up and down through the lifting cable 17.

[0045] The sling system has at least two components, including a balance beam 20, which is mounted on the lifting anchor box 16 of the lifting support 14. The upper part of the balance beam 20 has a balance sling 21 and a balance main cable 19. The balance main cable 19 is umbrella-shaped and its middle part is connected to the lifting cable 17. The lower part of the balance beam 20 has a connecting sling 18, which includes a first sling 29 and a second sling 30. The lower end of the connecting sling 18 is connected to the end of the middle arch rib 4. The connecting sling 18 transfers the load of the middle arch rib 4 to the balance beam 20, and the balance beam 20 transfers the load to the lifting anchor box 16. At the same time, since both ends of the balance beam 20 extend out of the lifting support 14, the function of the balance main cable 19 and the balance sling 21 is to ensure the balance and stability of the balance beam 20.

[0046] The closure system is installed on the inner end of the arch foot assembly bracket 5, including a temporary closure frame 27. The temporary closure frame 27 has a temporary bottom support 24. The bottom of the temporary closure frame 27 is movably installed on the arch foot assembly bracket 5 by a temporary fixing rod 31. The top of the temporary closure frame 27 is hinged to the arch foot assembly bracket 5 by a hinge shaft 25.

[0047] During the arch rib assembly stage, the arch foot assembly bracket 5 is used to support the arch foot arch rib 3, and the intermediate assembly bracket 8 is used to support the middle section arch rib 4 during the assembly process. The intermediate assembly bracket 8 is limited by the foot support 7, and the two ends of the middle section arch rib 4 are connected by the tie steel strand 9, and the lifting system is installed simultaneously.

[0048] After the arch ribs are assembled, the lifting system and the sling system are connected to both ends of the middle arch rib 4.

[0049] During the lifting phase of the middle arch rib 4, the lifting of the sling system, lifting anchor box 16, lifting cable 17, and middle arch rib 4 is carried out relatively synchronously.

[0050] When the middle arch rib 4 is lifted into place and the middle arch rib 4 and the arch foot rib 3 are joined together, the temporary fixing rod 31 is removed. One end of the temporary closure frame 27 is hinged to the arch foot assembly bracket 5 by the hinge shaft 25, and the other end is connected by the extended first section sling 29, the second section sling 30 and the anchor bolt 28. An adjustable pad 26 is installed on the top of the temporary closure frame 27. The adjustable pad 26 directly supports the middle arch rib 4 and the arch foot rib 3. Based on the above structure, the temporary closure frame 27 connects and fixes the middle arch rib 4 and the arch foot rib 3. Under its fixation, the closure operation of the middle arch rib 4 and the arch foot rib 3 is then carried out.

[0051] Example 2

[0052] Based on the same concept, this embodiment provides a construction method for a hydraulic synchronous lifting and closure structure of a high-span steel box girder main arch with a large span-to-rise ratio, comprising the following steps:

[0053] Step 1: Construction Preparation

[0054] S11. Material preparation: Procurement of the required structural materials, including arch ribs, supports, lifting equipment, slings and connectors, and inspection and acceptance of the materials;

[0055] S12. Construction site layout: Set up temporary facilities at the construction site to ensure the safety and unobstructed access of the construction area, and set up appropriate safety warning signs.

[0056] Step 2: Construction of the scaffold system

[0057] S21. Installation of arch leg assembly bracket 5:

[0058] On the top surface of the installed steel box girder 1, an arch foot assembly bracket 5 is arranged to support the arch foot rib 3.

[0059] The arch foot assembly brackets 5 are connected by the arch foot cross brace 2 to form an integral structure, ensuring its stability.

[0060] S22. Installation of intermediate assembly bracket 8:

[0061] An intermediate assembly bracket 8 is set between the arch foot assembly brackets 5 to support the middle section arch rib 4 during the assembly process;

[0062] Ensure the stability and accurate positioning of the intermediate assembly bracket 8 for subsequent arch rib assembly.

[0063] Step 3: Improve the system construction

[0064] S31. Installation of lifting bracket 14:

[0065] Install the lifting support 14 and ensure that its base is connected to the bottom steel pipe pile 11;

[0066] A top plate 22 is installed on the top of the lifting support 14, and a lifting jack 23 is installed on the top plate 22.

[0067] S32, Setting up the lifting anchor box 16:

[0068] An anchor box 16 is built into the lifting bracket 14 to ensure a stable connection between the anchor box and the bracket;

[0069] By connecting the lifting jack 23 to the lifting cable 17, the upward and downward sliding of the lifting anchor box 16 is ensured.

[0070] Step 4: Assembling the arch ribs

[0071] Assembly of S41, arch foot and arch rib 3:

[0072] Install the arch foot rib 3 on the arch foot assembly bracket 5 to ensure accurate alignment and stability;

[0073] Conduct necessary quality checks to ensure that the assembly quality of the arch foot and arch rib 3 meets the design requirements.

[0074] Assembly of S42 and middle arch rib 4:

[0075] Install the middle arch rib 4 on the middle assembly bracket 8 to ensure its stability and accuracy;

[0076] The overall stability of the arch rib is ensured by connecting the two ends of the middle section arch rib 4 with the tie steel strand 9.

[0077] Step 5: Installation of the sling system

[0078] S51, Installation of the balance beam 20:

[0079] A balance beam 20 is installed on the lifting anchor box 16 of the lifting support 14 to ensure its balance;

[0080] Install the main balancing cable 19 and the balancing sling 21 to form a stable sling system.

[0081] S52, Setting of connecting sling 18:

[0082] A connecting sling 18, including a first sling 29 and a second sling 30, is installed at the lower part of the balance beam 20, and their lower ends are connected to the end of the middle arch rib 4.

[0083] Ensure that the connecting sling 18 can effectively transfer the load of the middle arch rib 4 to guarantee the stability of the balance beam 20.

[0084] Step Six: Improvement Work

[0085] S61. Activation of the Enhancement System:

[0086] Start lifting jack 23. The lifting system should simultaneously lift anchor box 16 and middle arch rib 4 to achieve synchronous lifting.

[0087] Monitor load changes during the lifting process to ensure safe operation.

[0088] S62, Raise to the set height:

[0089] Raise the middle arch rib 4 to the design height, ensuring its position is accurate and it remains horizontal;

[0090] During the lifting process, the stability and safety of the sling system should be checked regularly.

[0091] Step 7: Closing Operation

[0092] S71. Remove temporary fixing rod 31:

[0093] After the lifting is completed, the temporary fixing pole 31 is removed, and preparations are made for the closure operation.

[0094] Installation of S72, temporary closure frame 27:

[0095] One end of the temporary closure frame 27 is hinged to the arch foot assembly bracket 5 via the hinge shaft 25, and the other end is connected to the extended first section sling 29, the second section sling 30 and the anchor bolt 28.

[0096] Adjustable pads 26 are installed on the top of the temporary closure frame 27 to directly support the middle arch rib 4 and the arch foot rib 3.

[0097] S73, Closure Operation Execution:

[0098] The middle arch rib 4 and the arch foot rib 3 are connected and fixed by the temporary closure frame 27;

[0099] The closure operation was carried out to ensure the stability and safety of the structure during the closure process.

[0100] Step 8: Construction Completion and Inspection

[0101] S81. Quality Inspection: Conduct quality inspections on the completed arch ribs and their connecting parts to ensure they meet design and relevant standards.

[0102] S82. Construction site cleanup: Organize the construction site and remove waste and debris generated during the construction process.

[0103] Example 3

[0104] The high-span-ratio steel box girder main arch mid-span low-position assembly hydraulic synchronous lifting closure structure was constructed using the aforementioned high-span-ratio steel box girder main arch mid-span low-position assembly hydraulic synchronous lifting closure system construction method.

[0105] The parts of this utility model not described in detail are existing technologies, therefore, this utility model does not describe them in detail.

[0106] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0107] Although this document uses a considerable amount of technical terminology, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0108] This utility model is not limited to the above-described preferred embodiment. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to this utility model falls within the protection scope of this utility model.

Claims

1. A hydraulic synchronous lifting and closure construction structure for the mid-span low-position assembly of a large span-to-span ratio ultra-high steel box girder main arch, characterized in that: This includes the arch rib structure, support system, lifting system, suspension cable system, and closure system; The arch rib structure includes arch foot ribs (3) and middle section arch ribs (4); The support system is arranged on the top surface of the installed steel box girder (1), including arch foot assembly support (5) and intermediate assembly support (8); the arch foot assembly support (5) is used to support the arch foot rib (3), and the arch foot assembly supports (5) are connected as one unit by arch foot cross brace (2); the intermediate assembly support (8) is used to support the middle section arch rib (4) during the assembly process; The lifting system has at least two parts. The lifting system includes a lifting support (14), which has a lifting support foot (15). The lower part of the lifting support foot (15) is connected to a bottom steel pipe pile (11). The bottom steel pipe pile (11) has a distribution beam (12) and a support plate (13) at the top. The lower part of the bottom steel pipe pile (11) is anchored by a pile cap (10). The lifting support (14) has a built-in lifting anchor box (16). The top of the lifting support (14) has a top plate (22). A lifting jack (23) is installed on the top plate (22). The lifting jack (23) drives the lifting anchor box (16) to slide up and down through the lifting cable (17). The suspension system has at least two parts. The suspension system includes a balance beam (20), which is installed on the lifting anchor box (16) of the lifting support (14). The upper part of the balance beam (20) has a balance sling (21) and a balance main cable (19). The middle part of the balance main cable (19) is connected to the lifting cable (17). The lower part of the balance beam (20) has a connecting sling (18). The lower end of the connecting sling (18) is connected to the end of the middle arch rib (4). The connecting sling (18) transfers the load of the middle arch rib (4) to the balance beam (20), and the balance beam (20) transfers the load to the lifting anchor box (16). The closure system is installed on the inner end of the arch foot assembly bracket (5), including a temporary closure frame (27). The temporary closure frame (27) has a temporary bottom support (24). The bottom of the temporary closure frame (27) is movably installed on the arch foot assembly bracket (5) by a temporary fixing rod (31). The top of the temporary closure frame (27) is hinged to the arch foot assembly bracket (5) by a hinge shaft (25).

2. The hydraulic synchronous lifting and closure construction structure for the mid-span low-position assembly of the large span-to-span ratio ultra-high steel box girder main arch according to claim 1, characterized in that, The intermediate assembly brackets (8) are connected as one unit by arched cross braces (6).

3. The hydraulic synchronous lifting and closure construction structure for the mid-span low-position assembly of the large span-to-span ratio ultra-high steel box girder main arch as described in claim 1, is characterized in that... The main balancing cable (19) is umbrella-shaped.

4. The hydraulic synchronous lifting and closure construction structure for the mid-span low-position assembly of the large span-to-span ratio ultra-high steel box girder main arch according to claim 1, characterized in that, The connecting sling (18) includes a first sling (29) and a second sling (30).

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