Prefabricated cantilever bent cap carrying, lifting and mounting construction method

Abstract

The invention provides a prefabricated cantilever cover beam carrying, lifting and mounting construction method, which comprises the following steps of: carrying a prefabricated cover beam to the side of a pier column in the transverse bridge direction in a manner of separated transportation and lifting and mounting or a manner of integrated transportation and lifting and mounting, and then directly lifting, transversely moving and falling, so that the cover beam can be lowered to the top of the pier column. The transportation, lifting and installation method is simple and rapid, can be completed in a short time, facilitates circulation of the carrying platform, is short in traffic influence time and small in traffic flow influence, and only needs to be carried out in the time period with few vehicles, so that the transportation, lifting and installation of the capping beam are completed, and the transportation, lifting and installation of the capping beam are completed. The capping beam operation can be completed within an hour after temporary closing, the influence on existing traffic is small, safety is controllable, the capping beam is prefabricated in a prefabrication site, a large number of steel pipe supports do not need to be erected on the site, time, materials and labor are saved, safety and quality are well guaranteed, and the method is simple in construction and high in generalizability.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a method for transporting, lifting, installing and constructing a prefabricated cantilever cap beam. Background Art

[0002] In urban bridge construction, when constructing large cantilever cap beams on elevated bridges over busy highways, installing cap beam supports and formwork on the existing road surface poses significant traffic disruptions and safety risks. Traditionally, the construction of large cantilever cap beams in urban bridge construction involves erecting full-height scaffolding with pre-set doorways for cap beam formwork and concrete pouring, or using large steel pipe Bailey scaffolding for rebar binding, formwork erection, and concrete pouring. This approach typically requires traffic closure or diversion for three to five days while the scaffolding is erected and the doorways are reserved. Once the scaffolding is complete, traffic is reopened for cap beam construction. However, lifting rebar and formwork, as well as pouring concrete, must be performed overhead. Despite the presence of a protective shelter, this still presents significant safety risks. Traffic also needs to be closed or diverted during the removal of the scaffolding, making the entire process complex and fraught with significant safety risks.

[0003] The disadvantages of the existing technology are: ① Installing the cap beam formwork support on the existing highway occupies the existing driving lane, continuously affecting the traffic of vehicles, often causing traffic jams and affecting residents' travel; ② Many existing vehicles are diverted to another road, resulting in an increase in traffic flow on other roads and increased traffic pressure; ③ The amount of materials used in erecting the support is large; ④ Erecting the support generally takes 2 to 3 working days and requires the cooperation of a large number of workers and mechanical equipment, which is time-consuming and labor-intensive, and increases the construction period and project cost; ⑤ Carrying out concrete pouring, hoisting and other operations on the existing highway that is open to traffic, posed a great safety risk.

[0004] In the above context, in order to achieve safe and fast operation during the installation of the cap beam, the applicant proposed a new solution. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method for transporting, lifting, and installing a prefabricated cantilever cap beam. This method does not require traffic interruption or the erection of a large number of supports, thereby shortening the construction period of the cap beam and reducing construction costs. The technical solutions employed include:

[0006] A method for transporting, lifting, and installing a prefabricated cantilever cap beam comprises the following steps:

[0007] S1. Cast a pair of piers on the central median of the road, or confirm the position of prefabricated piers on the central median of the road;

[0008] S2, prefabricated cap beam;

[0009] S3. Transport the cap beam along the road to the side of the pier in the direction of the bridge;

[0010] S4. Rotate the cap beam 90° to the side of the pier in the transverse direction of the bridge;

[0011] S5. Use a pair of carrying platforms to carry loads on both ends of the cap beam, so that the ends of the cap beam are placed on the carrying platforms. At this time, the pair of carrying platforms are placed on both sides of the pier column;

[0012] S6. Build or pre-build a support frame on the carrying platform, and provide a lifting system on the support frame;

[0013] S7. The lifting system lifts the cap beam, and the final horizontal height of the cap beam after lifting is higher than the horizontal height of the top of the pier column;

[0014] S8. A pair of carrying platforms, carrying support frames and lifting systems move the cap beam horizontally, placing the cap beam horizontally just above the pier column.

[0015] S9. Use the lifting system to lower the cap beam until it falls to the top of the pier column, completing the cantilever cap beam installation operation.

[0016] According to a method for transporting, lifting, installing and constructing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S3, the cap beam is transported to the side of the pier in the direction of the bridge by a modular vehicle, the middle part of the cap beam is placed on the modular vehicle, and its two ends are suspended in the air; or the cap beam is directly transported to the side of the pier in the direction of the bridge by a pair of transport platforms, and the pair of transport platforms are respectively carried on the two ends of the cap beam.

[0017] According to a method for transporting, lifting, installing and constructing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S4, the module vehicle is driven to transport the cap beam and rotate it 90° to the side of the pier in the transverse direction of the bridge; or a pair of transport platforms transport the cap beam and rotate it 90° to the side of the pier in the transverse direction of the bridge.

[0018] According to a method for transporting, lifting, and installing a prefabricated cantilever cap beam according to an embodiment of the present invention, if a modular vehicle is used to transport the cap beam to the side of the pier in the transverse direction of the bridge in step S4, then in step S5, a pair of transport platforms must be used and placed on both sides of the pier, and moved from both sides to the bottom of the end of the cap beam and the end of the cap beam is carried on them.

[0019] According to a method for transporting, lifting, installing and constructing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S5, the height of the transport plane of the module vehicle is lower than or equal to the height of the transport plane of the transport platform. Before using the transport platform to carry the end of the cap beam, the cap beam is first lifted up by a jack, and the transport platforms on both sides are respectively moved to the bottom of the two ends of the cap beam, and then the jack lowers the cap beam so that the end of the cap beam falls on the transport plane of the transport platform.

[0020] According to a method for transporting, lifting, and installing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S5, after the cap beam is lifted up by a jack, the transport platforms on both sides are respectively moved to the bottom of the flanges at both ends of the cap beam.

[0021] According to a method for transporting, lifting, and installing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S7, the lifting system lifts the cap beam to a position 20 cm above the top of the pier.

[0022] According to a method for transporting, lifting, and installing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S9, the lifting system controls the cap beam to slowly drop to a temporary support on the top of the pier column, and uses a three-way jack to complete precise position adjustment, and finally connects the cap beam to the pier body, thereby completing the cantilever cap beam installation operation.

[0023] According to a method for transporting, lifting, and installing a prefabricated cantilever cap beam according to an embodiment of the present invention, in step S9, the cap beam and the top of the pier column are fixedly connected by a steel stool.

[0024] According to a method for transporting, lifting, installing and constructing a prefabricated cantilever cap beam according to an embodiment of the present invention, lifting ears are provided on both sides of the middle portion of the cap beam during prefabrication. In step S7, the lifting system is connected to the lifting ears embedded in the cap beam via a lifting rope.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention uses a method of separate transportation and lifting installation, or a method of integrating transportation, lifting and installation. First, the prefabricated cap beam is transported to the side of the pier in the transverse direction of the bridge. Then, it is directly lifted, moved horizontally and dropped to lower the cap beam to the top of the pier. Finally, the pier and the cap beam are connected and installed, thus completing the transportation, lifting and installation of the cap beam. The transportation, lifting and installation method of the present invention is simple and fast, can be completed in a short time, and is convenient for the circulation of the carrying platform. It has a short impact on traffic time and little impact on traffic flow. It only needs to be temporarily closed during periods with fewer vehicles. The cap beam operation can be completed in just 1 hour, with little impact on existing traffic, safe and controllable. The lifting and rotating system is set on the carrying platform, which is easy to install and disassemble and can be used multiple times. The cap beam is prefabricated in the prefabrication site and does not require a large number of steel pipe supports to be set up on site, saving time, materials and labor, and ensuring safety and quality. This method is simple to construct and has strong scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a front view of step 3 of embodiment 1 of the present invention;

[0029] Figure 2 This is a top view of step 3 of embodiment 1 of the present invention;

[0030] Figure 3 This is a front view of step 4 of embodiment 1 of the present invention;

[0031] Figure 4 This is a top view of step 4 of embodiment 1 of the present invention;

[0032] Figure 5 This is a front view of step seven of Example 1 of the present invention;

[0033] Figure 6 This is a front view of step nine of embodiment one of the present invention;

[0034] Figure 7 This is a front view of step 3 of embodiment 2 of the present invention;

[0035] Figure 8 This is a side view of step 3 of embodiment 2 of the present invention;

[0036] Figure 9 This is a front view of step seven of embodiment 2 of the present invention;

[0037] Figure 10 This is a side view of step seven of embodiment 2 of the present invention;

[0038] Figure 11 This is a side view of step eight of embodiment 2 of the present invention;

[0039] Figure 12 This is a side view of step nine of embodiment 2 of the present invention;

[0040] Figure 13 A side view of the cap beam being installed on the pier using this method.

[0041] Description of main component symbols:

[0042] 10. Central median strip; 20. Pier; 30. Cap beam; 40. Carrying platform; 50. Support frame; 60. Lifting system; 70. Lifting rope; 80. Modular vehicle; 90. Steel stool. DETAILED DESCRIPTION

[0043] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but they should not be understood as limiting the scope of protection of the present invention.

[0044] In the description of this invention, "above," "below," and "within" are understood to be exclusive of the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0045] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0046] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; and internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in the present invention based on the specific content of the technical solution.

[0047] Example 1

[0048] A method for transporting, lifting, and installing a prefabricated cantilever cap beam comprises the following steps:

[0049] S1. Cast a pair of piers 20 on the central dividing strip 10 of the road, or confirm the position of the prefabricated piers 20 on the central dividing strip 10 of the road;

[0050] S2, prefabricated cap beam 30, the cap beam 30 is provided with lifting ears on both sides of its middle part during prefabrication;

[0051] S3. The cap beam 30 is transported to the side of the pier 20 along the bridge direction by a pair of transport platforms 40. At this time, the cap beam 30 is loaded on the pair of transport platforms 40. The pair of transport platforms 40 are respectively placed on the two ends of the cap beam 30, and the flanges of the two ends of the cap beam 30 fall on the transport platforms 40 respectively.

[0052] S4, a pair of carrying platforms 40 carry the cap beam 30 and rotate it 90 degrees to the side of the pier 20 in the transverse direction of the bridge;

[0053] S5. Build or pre-build a support frame 50 on the carrying platform 40, and provide a lifting system 60 on the support frame 50;

[0054] S6. The lifting system 60 is connected to the lifting lugs embedded in the cap beam 30 via the lifting rope 70, and then the cap beam 30 is lifted. The lifting system 60 lifts the cap beam 30 to a position 20 cm above the top of the pier 20.

[0055] S7, a pair of carrying platforms 40, carrying support frames 50, and lifting systems 60 move the cap beam 30 horizontally, so that the cap beam 30 is placed horizontally just above the pier 20;

[0056] S8. Use the lifting system 60 to lower the cap beam 30 until it falls to the top of the pier 20, completing the installation of the cantilever cap beam 30. Specifically, the lifting system 60 controls the cap beam 30 to slowly fall to the temporary support on the top of the pier 20, and uses the three-way jack to complete the precise adjustment of the position. Finally, the cap beam 30 is connected to the pier body, and the cap beam 30 and the top of the pier 20 are fixedly connected by the steel stool 90, thereby completing the installation of the cantilever cap beam 30.

[0057] In the first embodiment described above, the transportation and lifting installation of the cantilever cap beam 30 are integrated. The cap beam 30 is prefabricated in the prefabrication area and transported directly by a pair of transport platforms 40 carrying both ends of the cap beam 30. After being transported to the site, the cap beam 30 is rotated 90 degrees to the side of the pier 20 in the transverse direction of the bridge. The cap beam 30 is then lifted directly by the support frame 50 and the lifting system 60 on the transport platform 40 to a height higher than the top of the pier 20. Finally, the pair of transport platforms 40 are moved horizontally so that the cap beam 30 is directly above the pier 20. The cap beam 30 is then lowered and connected to the pier 20 to complete the installation operation. The existing technology implementation method is to set up a large number of steel pipe supports on the existing road to form a working platform, and then tie steel bars, set up formwork, and pour concrete on the supports to construct the cap beam 30. One method is to set up a large number of steel pipe supports for cap beam 30 construction, and the other method is to use the transport platform 40 to complete the transportation and lifting installation operations after the cap beam 30 is prefabricated in advance.

[0058] Example 2

[0059] A method for transporting, lifting, and installing a prefabricated cantilever cap beam comprises the following steps:

[0060] S1. Cast a pair of piers 20 on the central dividing strip 10 of the road, or confirm the position of the prefabricated piers 20 on the central dividing strip 10 of the road;

[0061] S2, prefabricated cap beam 30, the cap beam 30 is provided with lifting ears on both sides of its middle part during prefabrication;

[0062] S3. The cap beam 30 is transported to the side of the pier 20 along the bridge direction by the module vehicle 80. The middle portion of the cap beam 30 is placed on the module vehicle 80, with both ends of the cap beam suspended in the air.

[0063] S4, driving the module vehicle 80 to carry the cap beam 30 and rotate 90° to the side of the pier 20 in the transverse direction of the bridge;

[0064] S5. Drive a pair of carrying platforms 40 to be placed on both sides of the pier 20, and move them from both sides to below the end of the cap beam 30 to carry the end of the cap beam 30 thereon. Specifically, the height of the carrying plane of the module vehicle 80 is lower than or equal to the height of the carrying plane of the carrying platform 40. Before using the carrying platform 40 to carry the end of the cap beam 30, first use a jack to lift the cap beam 30. Then, the carrying platforms 40 on both sides are moved to below the flanges of the two ends of the cap beam 30. Then, the jacks lower the cap beam 30 so that the end of the cap beam 30 falls on the carrying plane of the carrying platform 40.

[0065] S6. Build or pre-build a support frame 50 on the carrying platform 40 and set a lifting system 60 on the top of the support frame 50;

[0066] S7. The lifting system 60 is connected to the lifting lugs embedded in the cap beam 30 via the lifting rope 70, and then the cap beam 30 is lifted. The lifting system 60 lifts the cap beam 30 to a position 20 cm above the top of the pier 20.

[0067] S8. A pair of carrying platforms 40 carry the support frame 50 and the lifting system 60 and move the cap beam 30 horizontally, so that the cap beam 30 is placed horizontally above the pier 20;

[0068] S9. Use the lifting system 60 to lower the cap beam 30 until it falls to the top of the pier 20, completing the installation of the cantilever cap beam 30. Specifically, the lifting system 60 controls the cap beam 30 to slowly fall to the temporary support on the top of the pier 20, and uses the three-way jack to complete the precise adjustment of the position. Finally, the cap beam 30 is connected to the pier body, and the cap beam 30 and the top of the pier 20 are fixedly connected by the steel stool 90, thereby completing the installation of the cantilever cap beam 30.

[0069] In the above-mentioned embodiment 2, the transportation and lifting installation of the cantilever cap beam 30 are separated. The cap beam 30 is prefabricated in the prefabrication area, and the cap beam 30 is transported by a module vehicle 80 and transported to the side of the pier 20 in the transverse direction of the bridge. The cap beam 30 is then carried on a pair of transporting platforms 40, and the cap beam 30 is lifted by the support frame 50 and the lifting system 60 arranged on the transporting platform 40. The lifting height is higher than the top of the pier 20, and finally the pair of transporting platforms 40 are moved horizontally so that the cap beam 30 is located directly above the pier 20. The cap beam 30 is dropped and connected to the pier 20 to complete the installation operation. The implementation plan of the prior art is to set up a large number of steel pipe supports on the existing road to form a working platform, and then tie steel bars on the supports, erect molds, and pour concrete to carry out the construction of the cap beam 30. One is to set up a large number of steel pipe supports to construct the cap beam 30, and the other is to use a module vehicle 80 and a carrying platform 40 to complete the transportation and lifting and installation operations respectively after the cap beam 30 is prefabricated in advance.

[0070] The present invention uses a method of separate transportation and lifting installation, or a method of integrating transportation, lifting and installation. First, the prefabricated cap beam 30 is transported to the side of the pier 20 in the transverse direction of the bridge. Then, it is directly lifted, moved horizontally and dropped to lower the cap beam 30 to the top of the pier 20. Finally, the pier 20 and the cap beam 30 are connected and installed, thus completing the transportation, lifting and installation of the cap beam 30. The transportation, lifting and installation method of the present invention is simple and fast, can be completed in a short time, and is convenient for the circulation of the carrying platform 40. It has a short impact on traffic time and little impact on traffic flow. It only needs to be temporarily closed during periods with fewer vehicles. The cap beam 30 operation can be completed in just one hour, with little impact on existing traffic and safe and controllable operation. The lifting and rotating system is arranged on the carrying platform 40, which is easy to install and disassemble and can be used multiple times. The cap beam 30 is prefabricated in a prefabrication site and does not require a large number of steel pipe supports to be erected on site, thus saving time, materials and labor, and ensuring good safety and quality. This method is simple to construct and has strong scalability.

[0071] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for transporting, lifting and installing a prefabricated cantilever cap beam, characterized in that: The following steps are included: S1. Casting a pair of piers (20) on the central dividing strip (10) of the road, or confirming the position of prefabricated piers (20) on the central dividing strip (10) of the road; S2, prefabricated cap beam (30); S3, transporting the cap beam (30) along the road to the side of the pier (20) along the bridge direction; S4, the cap beam (30) is carried and rotated 90 degrees to the side of the pier (20) in the transverse direction of the bridge; S5. Use a pair of carrying platforms (40) to carry loads on both ends of the cap beam (30) so that the ends of the cap beam (30) are placed on the carrying platforms (40). At this time, the pair of carrying platforms (40) are placed on both sides of the pier (20); S6. Building or pre-building a support frame (50) on the carrying platform (40), and providing a lifting system (60) on the support frame (50); S7, the lifting system (60) lifts the cap beam (30), and the final horizontal height of the cap beam (30) after lifting is higher than the horizontal height of the top of the pier column (20); S8, a pair of carrying platforms (40) carrying support frames (50) and a lifting system (60) move the cap beam (30) horizontally, so that the cap beam (30) is placed horizontally just above the pier column (20); S9. Use the lifting system (60) to lower the cap beam (30) until the cap beam (30) falls to the top of the pier (20), completing the installation operation of the cantilever cap beam (30).

2. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 1, characterized in that: In step S3, the cap beam (30) is transported to the side of the pier (20) along the bridge direction by a module vehicle (80), and the middle portion of the cap beam (30) is placed on the module vehicle (80), with both ends of the cap beam (30) suspended in the air; Alternatively, the cap beam (30) is directly transported to the side of the pier (20) along the bridge direction through a pair of transport platforms (40), and the pair of transport platforms (40) are respectively carried on the two ends of the cap beam (30).

3. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 2, characterized in that: In step S4, the module vehicle (80) is driven to carry the cap beam (30) and rotate it 90 degrees to the side of the pier (20) in the transverse direction of the bridge; or a pair of carrying platforms (40) are driven to carry the cap beam (30) and rotate it 90 degrees to the side of the pier (20) in the transverse direction of the bridge.

4. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 3, characterized in that: If the modular vehicle (80) is used to transport the cap beam (30) to the side of the pier (20) in the transverse direction of the bridge in step S4, then in step S5, a pair of transport platforms (40) must be placed on both sides of the pier (20) and moved from both sides to the bottom of the end of the cap beam (30) to carry the end of the cap beam (30) on them.

5. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 4, characterized in that: In step S5, the height of the carrying plane of the module vehicle (80) is lower than or equal to the height of the carrying plane of the carrying platform (40). Before using the carrying platform (40) to carry the end of the cap beam (30), the cap beam (30) is first lifted up by a jack, and the carrying platforms (40) on both sides are respectively moved to the bottom of the two ends of the cap beam (30), and then the jack lowers the cap beam (30) so that the end of the cap beam (30) falls on the carrying plane of the carrying platform (40).

6. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 5, characterized in that: In step S5, after the cap beam (30) is lifted up by the jack, the carrying platforms (40) on both sides are moved to the bottom of the flanges at both ends of the cap beam (30).

7. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 5, characterized in that: In step S7, the lifting system (60) lifts the cap beam (30) to a position 20 cm above the top of the pier (20).

8. The method for transporting, lifting, and installing a prefabricated cantilever cap beam according to claim 1, wherein: In step S9, the lifting system (60) controls the cap beam (30) to slowly drop to the temporary support on the top of the pier column (20), uses the three-way jack to complete the precise adjustment of the position, and finally connects the cap beam (30) to the pier body, thereby completing the cantilever cap beam (30) installation operation.

9. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 1, characterized in that: In step S9, the cap beam (30) and the top of the pier column (20) are fixedly connected via a steel stool (90).

10. A method for transporting, lifting and installing a prefabricated cantilever cap beam according to claim 2, characterized in that: The cap beam (30) is provided with lifting lugs on both sides of its middle portion during prefabrication. In step S7, the lifting system (60) is connected to the lifting lugs pre-buried on the cap beam (30) via the lifting rope (70).

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