A lifting and rotating system for double-column pier large cantilever cap beam

Abstract

This invention provides a lifting and rotating system for a large cantilever cap beam with two column piers. It includes a pair of diagonally opposite columns, with a fixed main beam erected between the columns. A rotating main beam is rotatably connected to the fixed main beam, and the rotating main beam can rotate at least 90° around the connection point. Lifting devices are located at both ends of the rotating main beam, and lifting cables are attached to both sides of each lifting device. This invention is used for lifting and rotating a large cantilever cap beam for installation. The entire lifting, rotating, and installation operation of the large cantilever cap beam is completed within the median strip of the road, minimizing disruption to existing traffic. By utilizing the rotating main beam's ability to rotate more than 90°, combined with the synchronous movement of the lifting devices, this invention achieves precise rotation and positioning of the large cantilever cap beam. It is particularly suitable for bridge construction in space-constrained or complex terrain conditions. The modular design of each structure in this invention makes installation and dismantling very convenient, and the materials can be reused multiple times.

Description

Technical Field

[0001] This application relates to the technical field of methods or equipment specifically for erecting or assembling bridges, and specifically to a lifting and rotating system for a double-column pier cantilever cap beam. Background Technology

[0002] In the construction of large cantilever cap beams for urban bridges, the traditional approach is to use a full-span scaffold with pre-reserved portal openings for tasks such as formwork erection and concrete pouring, or to use a large steel pipe Bailey scaffold for these operations. This method typically requires closing traffic for 3-5 days to erect the scaffolds and create the portal openings. Then, the reinforcing steel and formwork are hoisted onto the existing road. During this time, crane operations require placing the hoisted loads on the existing road. After the cap beam concrete is poured and cured, the scaffolds are dismantled, and traffic is reopened.

[0003] The disadvantages of existing technologies are as follows: ① Installing the formwork support for the cap beam on existing highways occupies existing driving lanes, continuously affecting vehicle traffic, frequently causing traffic jams, and affecting residents' travel; ② Many existing vehicles are diverted to other roads, resulting in increased traffic flow on other roads and increased traffic pressure; ③ The amount of materials used for erecting the support is large; ④ Erecting the support generally takes 2 to 3 working days and requires a large number of workers and machinery, which is time-consuming and labor-intensive, increasing the construction period and project cost; ⑤ Carrying out concrete pouring, hoisting, and other operations on existing highways that are already in operation poses significant safety risks.

[0004] Against this backdrop, the applicant has proposed a new solution for the installation of bridge cap beams in urban areas. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a double-column pier large cantilever cap beam lifting and rotation system, which can realize rapid and safe rotation of the bridge body, reducing the impact on existing traffic. The technical solution adopted includes:

[0006] A double-column pier cantilever cap beam lifting and rotation system includes a pair of diagonally arranged columns, a fixed main beam erected between the two columns, a rotating main beam rotatably connected to the fixed main beam, the rotating main beam being able to rotate at least 90° with the rotational connection point of the two columns as the axis, lifting devices are respectively provided at both ends of the rotating main beam, and lifting cables are provided on both sides of each lifting device.

[0007] According to an embodiment of the present invention, a lifting and rotating system for a double-column pier large cantilever cap beam includes a distribution beam disposed at the end of a rotating main beam, and lifting jacks disposed at both ends of the distribution beam; the distribution beam is disposed perpendicular to the top of the rotating main beam; and the lifting cable is connected to the lifting jacks.

[0008] According to an embodiment of the present invention, a lifting and rotating system for a double-column pier large cantilever cap beam includes two lifting devices connected to both sides of the central axis of the large cantilever cap beam in the y direction, and two lifting cables of one lifting device connected to both sides of the axis of the large cantilever cap beam in the x direction.

[0009] According to an embodiment of the present invention, a lifting and rotating system for a double-column pier large cantilever cap beam is provided, wherein the lifting cable is a steel strand with a tensile strength of 1860 MPa.

[0010] According to an embodiment of the present invention, a lifting and rotating system for a double-column pier large cantilever cap beam is provided, wherein a rotating mechanism is connected between the fixed main beam and the rotating main beam, the rotating mechanism including a rotating motor and a rotating bearing, the inner ring of the rotating bearing being connected to the rotating main beam, and the outer ring of the rotating bearing being connected to the fixed main beam.

[0011] According to an embodiment of the present invention, a lifting and rotating system for a double-column pier cantilever cap beam is provided, wherein the rotating mechanism is connected to the center of a fixed main beam and a rotating main beam respectively, and the center of the fixed main beam coincides with the center of the diagonal line between a pair of columns.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention is used for lifting and rotating large cantilever beams for installation, enabling rapid and safe rotation of the beams. The entire lifting, rotation, and installation operation is completed within the median strip of the road, minimizing disruption to existing traffic. This invention utilizes the main beam's rotation capability of over 90°, combined with the synchronous movement of the lifting device, to achieve precise rotation and positioning of the large cantilever beam. It is particularly suitable for bridge construction in confined spaces or complex terrain. The diagonally positioned columns allow the large cantilever beam to move within a maximum range between the two columns, achieving a 90° rotation. This structure also enhances overall anti-tilting capacity, disperses load stress, and ensures system stability during lifting and rotation. The modular design of each structure in this invention makes installation and dismantling very convenient, and the materials can be reused multiple times. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0015] Figure 1 This is a perspective view of some embodiments of the present utility model. Figure 1 ;

[0016] Figure 2 This is a perspective view of some embodiments of the present utility model. Figure 2 ;

[0017] Figure 3 This is a perspective view of some embodiments of the present utility model. Figure 3 ;

[0018] Figure 4 This is a three-dimensional schematic diagram of the rotating structure in some embodiments of the present invention;

[0019] Figure 5 This is a perspective view of one step in the installation of a large cantilever beam, representing one of some embodiments of the present invention.

[0020] Figure 6 This is a perspective view of step three of some embodiments of the present invention applied to the installation of a large cantilever beam;

[0021] Figure 7 This is a front view of step three of some embodiments of the present invention applied to the installation of a large cantilever beam;

[0022] Figure 8 This is a perspective view of step five of some embodiments of the present invention applied to the installation of a large cantilever beam;

[0023] Figure 9 This is a front view of step five of some embodiments of the present invention applied to the installation of a large cantilever cap beam;

[0024] Figure 10 This is a perspective view of step six of some embodiments of the present invention applied to the installation of a large cantilever beam;

[0025] Figure 11 This is a front view of step six of some embodiments of the present invention applied to the installation of a large cantilever cap beam;

[0026] Figure 12 This is a perspective view of step seven of some embodiments of the present invention applied to the installation of a large cantilever beam;

[0027] Figure 13 This is a front view of step seven of some embodiments of the present invention applied to the installation of a large cantilever beam.

[0028] Explanation of key component symbols:

[0029] 10. Central median strip; 20. Piers; 30. Large cantilever cap beam; 40. Columns; 50. Fixed main beam; 60. Rotating main beam; 70. Lifting cable; 80. Slewing mechanism; 81. Slewing bearing; 90. Distribution beam; 100. Lifting jack. Detailed Implementation

[0030] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0031] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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, they should not be construed as limitations on this utility model.

[0033] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] This utility model provides a lifting and rotation system for a double-column pier large cantilever cap beam, such as... Figure 1 , 2 As shown in Figure 3, the device includes a pair of diagonally opposite columns 40, with a fixed main beam 50 erected between the two columns 40. A rotating main beam 60 is rotatably connected to the fixed main beam 50. The rotating main beam 60 can rotate at least 90° with the rotational connection point of the two columns as the axis. Lifting devices are provided at both ends of the rotating main beam 60, and lifting cables 70 are provided on both sides of each lifting device. The lifting cables 70 are steel strands with a tensile strength of 1860 MPa.

[0035] This utility model provides a lifting and rotation system for a double-column pier large cantilever cap beam, used for lifting and installing the large cantilever cap beam 30. The specific method is as follows:

[0036] S1. A support frame 80 is erected in the middle area between the two piers 20 of the central divider 10 of the road, and then a precast large cantilever cap beam 30 is poured on site. At this time, the two ends of the large cantilever cap beam 30 are set along the length of the central divider 10 of the road and are parallel to the roads on both sides. When the large cantilever cap beam 30 is precast, a pair of lifting rings are set on both sides of the middle part of the large cantilever cap beam 30, and the pair of lifting rings are symmetrically set on both sides.

[0037] S2. A column 40 is set on the outside of each of the two piers 20. The two columns 40 are set on both sides of the central divider 10 of the road and diagonally opposite each other. The height of the column 40 exceeds the height of the pier 20.

[0038] S3. A fixed main beam 50 is erected between two columns 40. The two ends of the fixed main beam 50 are respectively connected to the top of the columns 40. A rotating main beam 60 is rotatably connected to the fixed main beam 50. A slewing mechanism 100 is connected between the fixed main beam 50 and the rotating main beam 60. The rotating main beam 60 can rotate at least 90° around the slewing mechanism 100. Lifting devices are provided at both ends of the rotating main beam 60. Lifting cables 70 are provided on both sides of each lifting device. The lifting cables 70 are steel strands with a tensile strength of 1860 MPa. The slewing mechanism 100 is connected to the center of the fixed main beam 50 and the rotating main beam 60. The center of the fixed main beam 50 coincides with the center of the diagonal line between the pair of columns 40 and is located on the center line of the two piers 20.

[0039] S4. Use lifting cables 70 to connect the prefabricated large cantilever cap beam 30. The lifting cables 70 of the lifting devices at both ends of the rotating main beam 60 are respectively connected to both sides of the central axis of the large cantilever cap beam 30 in the y direction. The two lifting cables 70 of one lifting device are respectively connected to both sides of the axis of the large cantilever cap beam 30 in the x direction. In this way, the four sets of lifting cables 70 of the two lifting devices are respectively fixed to the four sides of both ends of the large cantilever cap beam 30. The lifting cables 70 are connected to the lifting rings.

[0040] S5. Use a lifting device to lift the large cantilever cap beam 30 located between the two piers 20. The two sides of the large cantilever cap beam 30 are lifted up simultaneously by two lifting devices until it is lifted to a height of 20cm above the top of the pier 20 and then stops.

[0041] S6. The large cantilever cap beam 30 is rotated 90° by the slewing mechanism 100.

[0042] S7. After the large cantilever cap beam 30 is rotated into place, the large cantilever cap beam 30 is lowered using a lifting device. The two sides of the large cantilever cap beam 30 are lowered simultaneously by two lifting devices until the bottom of the large cantilever cap beam 30 is close to the top of the pier column 20. After ensuring that the docking position of the large cantilever cap beam 30 and the pier column 20 is correct, continue to lower it until it is aligned with the installation position. Finally, connect the large cantilever cap beam 30 and the pier column 20.

[0043] The existing implementation plan involves erecting a large number of steel pipe supports on the existing road to form a working platform, and then binding steel bars, erecting formwork, and pouring concrete on the supports to carry out the construction of the large cantilever cap beam 30.

[0044] This utility model is used for lifting and rotating the large cantilever cap beam 30 for installation. Specifically, the large cantilever cap beam 30 is lifted by a lifting device, and then the slewing mechanism 100 drives the rotating main beam 60 to rotate. The rotating main beam 60 simultaneously drives the lifting device to rotate, and the lifting device simultaneously drives the large cantilever cap beam 30 to complete the rotation. Finally, the lifting device lowers the large cantilever cap beam 30 onto the pier 20, thus connecting the large cantilever cap beam 30 and the pier 20. The double-column pier large cantilever cap beam 30 lifting and rotating system provided by this utility model is used for lifting, rotating and lowering the large cantilever cap beam 30 to assist in the lifting and installation of the large cantilever cap beam 30. This ensures that the installation of the large cantilever cap beam 30 does not affect traffic or the impact on traffic is very short. The entire lifting, rotating and installation operation is completed within the central median strip 10 of the road. Only when the large cantilever cap beam 30 rotates 90° is it necessary to temporarily interrupt traffic to ensure safety. The operation can be arranged at night when there is little traffic, so the impact on existing traffic is small and the safety is controllable. This invention utilizes the rotation capability of the main beam 60 (over 90°) combined with the synchronous movement of the lifting device to achieve precise rotation and positioning of the large cantilever cap beam 30, significantly improving installation efficiency. It is particularly suitable for bridge construction in space-constrained or complex terrain conditions. The diagonally positioned columns 40 allow the large cantilever cap beam 30 to move within a maximum range between the two columns 40 to achieve a 90° rotation. This structure also enhances the overall anti-tilting capacity, disperses load stress, and ensures the stability of the system during lifting and rotation. The modular design of each structure in this invention makes installation and dismantling very convenient, and the materials can be reused multiple times.

[0045] Furthermore, in some embodiments of this utility model application, such as Figure 1 , 2 As shown in Figure 3, the lifting device includes a distribution beam 90 disposed at the end of the rotating main beam 60, and lifting jacks 100 disposed at both ends of the distribution beam 90; the distribution beam 90 is disposed perpendicular to the top of the rotating main beam 60; the lifting cable 70 is connected to the lifting jacks 100.

[0046] In the aforementioned embodiment, the specific structure of the lifting device is further optimized, resulting in more uniform load distribution and higher safety. The distribution beam 90 is set perpendicular to the rotating main beam 60, forming a transverse force-bearing structure that can evenly distribute the lifting load to both sides of the rotating main beam 60, avoiding local deformation or instability caused by concentrated stress. Lifting jacks 100 are symmetrically arranged at both ends of the distribution beam 90 to achieve dual-point balanced lifting of the cap beam, effectively preventing the large cantilever cap beam 30 from tilting or twisting during lifting or rotation, thus improving construction safety. The lifting jacks 100 can independently adjust their lifting speed and stroke, adjusting the horizontal posture of the cap beam in real time (such as slightly raising or lowering one end) to ensure millimeter-level accuracy when the cap beam is connected to the pier column 20. The installation process is more intelligent, and the jack return oil data can be collected and analyzed throughout the entire process to monitor the stress on the cap beam during lifting, making the entire lifting and rotation operation controllable.

[0047] Furthermore, in some embodiments of this utility model application, such as Figure 1 , 2 As shown in Figures 3 and 4, a slewing mechanism 100 connects the fixed main beam 50 and the rotating main beam 60. The slewing mechanism 100 includes a slewing motor and a slewing bearing 111. The inner ring of the slewing bearing 111 is connected to the rotating main beam 60, and the outer ring of the slewing bearing 111 is connected to the fixed main beam 50. The inner ring of the slewing bearing 111 is connected to the rotating main beam 60, and the outer ring is connected to the fixed main beam 50, forming a stable rotating pair. The load-sharing design of the inner and outer rings of the slewing bearing 111 evenly transmits the load of the rotating main beam 60 to the fixed main beam 50 through rolling elements, avoiding local stress concentration and extending service life. The slewing motor drives the slewing bearing 111 through a reduction mechanism (such as gears or worm gears), which can precisely control the rotation angle (within ±0.5°) to meet the stringent alignment requirements of the cap beam and the pier column 20.

[0048] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A lifting and rotating system for a double-column pier cantilever cap beam, characterized in that, It includes a pair of diagonally opposite columns (40), a fixed main beam (50) is erected between the two columns (40), a rotating main beam (60) is rotatably connected to the fixed main beam (50), the rotating main beam (60) can rotate at least 90° with the rotation connection point of the two columns as the axis, and lifting devices are provided at both ends of the rotating main beam (60), and lifting cables (70) are provided on both sides of each lifting device.

2. The double-column-pier large cantilever cap beam hoisting and rotating system according to claim 1, characterized in that, The lifting device includes a distribution beam (90) disposed at the end of the rotating main beam (60), and lifting jacks (100) disposed at both ends of the distribution beam (90); the distribution beam (90) is disposed perpendicular to the top of the rotating main beam (60); the lifting cable (70) is connected to the lifting jack (100).

3. The double-column-pier large cantilever cap beam hoisting and rotating system according to claim 1, characterized in that, Two lifting devices are respectively connected to the two sides of the central axis of the large cantilever cap beam (30) in the y direction, and the two lifting cables (70) of one lifting device are respectively connected to the two sides of the axis of the large cantilever cap beam (30) in the x direction.

4. The double-column-pier large cantilever cap beam hoisting and rotating system according to claim 1, characterized in that, The lifting cable (70) is a steel strand with a tensile strength of 1860 MPa.

5. The double column pier large cantilever cap beam hoisting and rotating system according to claim 1, characterized in that, A slewing mechanism (110) is connected between the fixed main beam (50) and the rotating main beam (60). The slewing mechanism (110) includes a slewing motor and a slewing bearing (111). The inner ring of the slewing bearing (111) is connected to the rotating main beam (60), and the outer ring of the slewing bearing (111) is connected to the fixed main beam (50).

6. The double-column-pier large cantilever cap beam hoisting and rotating system according to claim 1, characterized in that, The slewing mechanism (110) is connected to the center of the fixed main beam (50) and the rotating main beam (60), respectively. The center of the fixed main beam (50) coincides with the center of the diagonal line between a pair of columns (40).

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