Integral lifting structure and method of platform cast-in-place beam bailey piece support structure

Abstract

This invention discloses an overall lifting structure and method for a Bailey bridge support structure of a cast-in-place platform beam, relating to the field of building construction. The structure includes a platform beam with cast-in-place turnout beams on both sides. A lifting system is installed on the flange plate of the turnout beam of the platform beam. The lifting system includes Bailey bridge supports, steel strands, lifting jacks, a lifting beam, and anchoring devices. The lifting jacks are installed on the upper part of the flange plate of the turnout beam of the platform beam and connected to the steel strands. The Bailey bridge supports are located on the upper part of the lifting beam, which is connected to the steel strands via anchoring devices. This overall lifting structure for the cast-in-place platform beam with Bailey bridge support improves construction safety by avoiding high-altitude operations, reducing the risk to personnel at heights, and lowering the probability of accidents during construction.

Description

Technical Field

[0001] This invention relates to the field of building construction, and in particular to an integral lifting structure and method for a cast-in-place Bailey bridge support structure for a platform. Background Technology

[0002] In the field of building construction, cast-in-place beams are a common construction method widely used in various engineering projects. This construction method involves pouring concrete directly into on-site precast formwork to form the beam structure. Compared to precast beams, cast-in-place beams offer greater flexibility, enabling them to meet specific design and structural requirements, especially for beams requiring custom shapes and sizes.

[0003] Traditional platform beam construction often uses steel pipe columns supported by Bailey bridges or modular scaffolding as the supporting structure. Bailey bridges, acting as load-bearing plates, effectively support the weight of the platform and reliably transfer the load to supports or other supporting structures. Modular scaffolding's main feature is that its transverse support beams connect to the uprights, forming a stable support frame. However, during platform beam construction, the limited crane lifting space due to adjacent turnout beams makes lifting extremely difficult. This is especially true after construction, when using traditional Bailey bridges for pulling and lifting operations, which are particularly challenging. Using modular scaffolding as a support requires workers to perform high-altitude operations from installation to dismantling, posing a significant risk.

[0004] To address these issues, the construction industry has begun exploring new support technologies and construction methods. For example, some projects have started using adjustable support frames to replace traditional Bailey panels or modular scaffolding. However, these still lack the flexibility to adapt to specific conditions and are difficult to suit working environments with varying heights and space constraints. Summary of the Invention

[0005] To overcome the shortcomings of traditional platform beam construction methods that often use steel pipe columns supported by Bailey bridges or modular scaffolding as support structures, this invention provides an integrated lifting structure and method for the Bailey bridge support structure of cast-in-place platform beams. This structure combines a lifting system with Bailey bridge support, making platform beam construction more flexible, efficient, and safe. By using continuous hydraulic lifting / lowering jacks, construction efficiency can be improved while ensuring safety, avoiding the risks of working at heights inherent in traditional methods. This construction method not only improves the safety and efficiency of platform beam construction but also reduces construction costs and enhances project quality.

[0006] This invention is achieved through the following technical solution: an integral lifting structure for a cast-in-place platform beam with Bailey bridge support, comprising a platform beam, on both sides of which are cast-in-place turnout beams. A lifting system is provided on the flange plates of the turnout beams on both sides of the platform beam. The lifting system includes Bailey bridge supports, steel strands, lifting jacks, lifting beams, and anchoring devices. The lifting jacks are installed on the upper part of the flange plates of the turnout beams on both sides of the platform beam and connected to the steel strands. During installation, the lifting jacks are fixed to the flange plates of the turnout beams on both sides of the platform beam by I-beam supports. The lifting jacks are fixed by three diagonal bracing to ensure vertical stability. The Bailey bridge supports are located on the upper part of the lifting beams, and the lifting beams are connected to the steel strands by anchoring devices.

[0007] Preferably, the lifting beam is fixed to the bottom of the Bailey plate support by a U-shaped clip.

[0008] Preferably, it also includes a steel pipe pile support perpendicular to the turnout cast-in-place beam, the upper part of the steel pipe pile support is provided with a dropping device, and the upper part of the dropping device is provided with a support beam that cooperates with the Bailey bridge support.

[0009] Preferably, the bottom of the lifting beam is connected to a lifting spreader beam, and a seven-hole anchor is installed and fixed at the lower part of the lifting spreader beam. The steel strand passes through the seven-hole anchor and is fixed by clamps.

[0010] Preferably, a steel strand extrusion sleeve is installed below the clamp.

[0011] Another aspect of the present invention is achieved through the following technical solution: a method for installing and dismantling a Bailey bridge support structure for a cast-in-place beam on a platform, comprising the following steps,

[0012] Step 1: Overall lifting of the Bailey bridge support structure for the platform beams;

[0013] Lifting jacks are installed on the flange plates of the turnout beams on both sides of the platform beam; a lifting beam is placed, perpendicular to the position where the steel strands on the turnout beam pass through the reserved holes; supporting Bailey bridge sections are installed on the upper part of the lifting beam; lifting jacks are installed at the flange plates of the turnout beams; the lifting beam is connected to the steel strands through anchoring devices; the lifting jacks are activated to lift the entire Bailey bridge support structure; according to the construction elevation, steel pipe pile supports, steel pipe column horizontal connections, steel pipe column wall connection supports, unloading devices, and supporting beams are hoisted from bottom to top; after the steel pipe pile supports are installed, the lifting jacks are activated to lower the entire Bailey bridge support structure to the upper part of the supporting beams, and the lifting jack lowering operation is stopped; the overall lifting operation of the Bailey bridge support structure is completed.

[0014] Step 2: Construction and pouring of platform beams;

[0015] Dismantle the lifting jacks, steel strands, and anchoring devices;

[0016] Lay the bottom formwork of the platform beam, install the side formwork and inner formwork; carry out the reinforcement binding, concrete pouring and prestressing tensioning of the platform beam to complete the construction of the platform beam;

[0017] Step 3: Disassemble the entire lower part of the Bailey bridge support structure for the platform beam;

[0018] After the platform beam is poured, the unloading device on the steel pipe pile support is unloaded, so that the supporting beam and Bailey support structure on the unloading device are lowered as a whole.

[0019] After the entire Bailey panel support structure is dismantled, the side formwork, bottom formwork, and inner formwork are removed.

[0020] Lower the jacks when installing the platform beam flange plate;

[0021] Lift the anchoring device to the bottom of the lifting beam and continue the jack lifting operation;

[0022] The Bailey panel support structure was completely detached from the support beam, and the jacking operation was stopped; the support beam, unloading device, steel pipe pile support and buttress support were removed from top to bottom.

[0023] The lifting jacks were activated to lower the entire Bailey bridge support structure until it was safely placed on the ground.

[0024] The steel strand anchoring devices were removed, the jacks lowered to the beam surface were dismantled, and the Bailey bridge support structure was disassembled on the ground, completing all construction work for the platform beam.

[0025] Preferably, in step one, when the lifting beam vertically corresponds to the turnout beam surface and lifts the steel strand through the reserved hole position, the lifting beam is supported by the beam to ensure a clear distance between the lifting beam and the ground.

[0026] Preferably, in step one, when installing the lifting jack at the flange plate position of the turnout beam, an I-beam support is installed at the bottom of the lifting jack, and the lifting jack is fixed to the flange plate position of the turnout beam of the platform beam by three diagonal pulls.

[0027] Preferably, in step one, when the lifting beam is connected to the steel strands through the anchoring device, six steel strands are threaded through the steel strand channel at the top of the lifting jack to the anchoring device at the bottom of the lifting beam on the ground, and each steel strand is pre-tightened.

[0028] Preferably, in step one, when the Bailey support structure is lifted as a whole, if the lifting beam comes into contact with the bottom plate of the adjacent turnout beam on both sides of the platform beam, the lifting is stopped and the steel strand of the lifting jack is locked.

[0029] Compared with existing technologies, this invention has the following beneficial effects: The overall lifting structure for the Bailey bridge support structure of the cast-in-place platform beam improves construction safety: by avoiding high-altitude operations, it reduces the risks to personnel at heights and lowers the probability of accidents during construction; the use of advanced equipment such as continuous hydraulic lifting / lowering jacks simplifies the construction process, reduces manual operation, and thus improves construction efficiency. Optimizing the construction process reduces the need for human resources and saves construction costs. Simultaneously, it avoids errors and rework that may occur in traditional construction, saving material and time costs; it ensures accuracy and stability during construction, thereby improving construction quality and reliability; and by optimizing the construction method, it reduces environmental impact and resource consumption, aligning with the concept of sustainable development. This lifting structure and method are not only applicable to the construction of platform beams but can also be extended to the construction of other similar structures, demonstrating excellent versatility and applicability. Attached Figure Description

[0030] Figure 1 This is a front structural diagram of the platform beam construction according to the present invention.

[0031] Figure 2 This is a cross-sectional structural diagram of the platform beam of the present invention.

[0032] Figure 3 This is a diagram showing the arrangement of reserved holes for the steel strands of the turnout beam according to the present invention.

[0033] Figure 4 This is a schematic diagram of the overall lifting of the Bailey sheet support structure of the present invention.

[0034] Figure 5 This is a schematic cross-sectional view of the Bailey support structure of the present invention being lifted as a whole.

[0035] Figure 6 This is a schematic diagram of the installation of the steel pipe column support according to the present invention.

[0036] Figure 7 This is a schematic cross-sectional view of the steel pipe column support installation construction of the present invention.

[0037] Figure 8 This is a schematic diagram of the Bailey panel support lowering construction of the present invention.

[0038] Figure 9 This is a schematic cross-sectional view of the Bailey panel support lowering construction of the present invention.

[0039] Figure 10 This is a schematic diagram of the platform beam formwork installation, rebar tying and pouring construction of the present invention.

[0040] Figure 11 This is a schematic cross-sectional view of the platform beam formwork installation, rebar tying and pouring construction of the present invention.

[0041] Figure 12 This is a schematic diagram of the preparatory construction process before dismantling the Bailey bridge support structure of the platform beam according to the present invention.

[0042] Figure 13 This is a schematic diagram of the unloading device of the present invention before unloading.

[0043] Figure 14 This is a schematic diagram of the unloading device of the present invention after unloading.

[0044] Figure 15 This is a cross-sectional schematic diagram of the preparatory construction stage before the dismantling of the Bailey bridge support structure for the platform beam according to the present invention.

[0045] Figure 16 This is a schematic diagram of the pre-lifting operation of the Bailey bridge support structure for the platform beam of the present invention.

[0046] Figure 17 This is a schematic cross-sectional view of the pre-lifting operation of the Bailey bridge support structure for the platform beam of the present invention.

[0047] Figure 18 This is a schematic diagram of the dismantling operation of the steel pipe pile support for the platform beam according to the present invention.

[0048] Figure 19 This is a schematic cross-sectional view of the dismantling operation of the steel pipe pile support for the platform beam according to the present invention.

[0049] Figure 20 This is a schematic diagram of the overall lowering operation of the Bailey support structure of the present invention.

[0050] Figure 21 This is a schematic cross-sectional view of the overall lowering operation of the Bailey support structure of the present invention.

[0051] Figure 22 This is a schematic diagram of the ground dismantling operation of the Bailey support structure of the present invention.

[0052] Figure 23 This is a schematic cross-sectional view of the ground dismantling operation of the Bailey support structure of the present invention.

[0053] Figure 24 This is a schematic diagram of the steel strand anchoring device of the present invention.

[0054] Figure 25 This is a schematic diagram of the seven-hole anchor structure of the present invention.

[0055] Figure 26 This is a schematic diagram of the cross-sectional structure of the seven-hole anchor of the present invention.

[0056] Figure 27 This is a schematic diagram of the steel strand extrusion sleeve structure of the present invention.

[0057] Figure 28 This is a schematic diagram of the lifting beam structure of the present invention.

[0058] Figure 29 This is a schematic diagram of the lifting spreader beam structure of the present invention.

[0059] Explanation of reference numerals in the attached drawings: 1. Platform beam; 2. Cast-in-place beam for turnout; 3. Bailey bridge support; 4. Steel strand; 5. Lifting jack; 6. Lifting crossbeam; 7. Anchoring device; 8. Steel pipe pile support; 9. Unloading device; 10. Support crossbeam; 11. Lifting spreader beam; 12. Seven-hole anchor; 13. Steel strand extrusion sleeve; 14. Inner formwork of platform beam; 15. Outer formwork of platform beam. Detailed Implementation

[0060] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0061] Example 1:

[0062] Referring to the figure, this embodiment provides an integral lifting structure for a cast-in-place platform beam with Bailey bridge support structure. It includes a platform beam 1, with turnout cast-in-place beams 2 on both sides of the platform beam 1. A lifting system is provided on the turnout beam flanges of the platform beam 1. The lifting system includes Bailey bridge supports 3, steel strands 4, lifting jacks 5, a lifting beam 6, and anchoring devices 7. The lifting jacks 5 are installed on the upper part of the turnout beam flanges on both sides of the platform beam 1 and connected to the steel strands 4. During installation, the lifting jacks 5 are fixed to the turnout beam flanges on both sides of the platform beam 1 by I-beam supports. The lifting jacks are fixed with three diagonal bracings to ensure vertical stability. The Bailey bridge supports 3 are located on the upper part of the lifting beam 6, and the lifting beam 6 is connected to the steel strands 4 by the anchoring devices 7. The lifting beam 6 is fixed to the bottom of the Bailey bridge supports 3 by U-shaped clips. It also includes a steel pipe pile support 8 perpendicular to the cast-in-place beam 2 of the turnout. The upper part of the steel pipe pile support 8 is equipped with a dropping device 9, and the upper part of the dropping device 9 is equipped with a support beam 10 that cooperates with the Bailey bridge support 3. The bottom of the lifting beam 6 is connected to a lifting spreader beam 11, and a seven-hole anchor 12 is installed and fixed at the lower part of the lifting spreader beam 11. The steel strand 4 passes through the seven-hole anchor 12 and is fixed by a clamp; a steel strand compression sleeve 13 is installed below the clamp.

[0063] Example 2:

[0064] Referring to the figure, the present invention provides a method for the overall installation and dismantling of the Bailey bridge support structure for a cast-in-place platform beam. Step 1: The Bailey bridge support structure for the platform beam is lifted as a whole.

[0065] Use the cast-in-place turnout beams on both sides of the platform beam as the installation positions for the lifting jacks, and install the lifting jacks on the turnout beam flanges adjacent to the platform beam.

[0066] At the ground position perpendicular to the platform beam, a lifting beam is placed. The lifting beam is perpendicular to the turnout beam surface to lift the steel strand through the reserved hole. Other beams can be used to support the lifting beam and the ground to leave a certain clearance between the lifting beam and the ground, which is convenient for installing the steel strand anchoring device. There are two lifting beams in total.

[0067] Assemble the supporting Bailey panels on the upper part of the lifting beam, and lay the bottom formwork and horizontally distribute the I-beams on the Bailey panel support structure;

[0068] Install lifting jacks at the flange plate of the turnout beam, install I-beam supports at the bottom of the lifting jacks, and fix the lifting jacks with three diagonal bracing to ensure the vertical stability of the lifting jacks;

[0069] Six steel strands are threaded through the steel strand channel at the top of the lifting jack to the anchoring device under the lifting beam on the ground. Each steel strand is pre-tensioned to ensure that it is evenly stressed during lifting. A total of 24 steel strands are installed at four lifting points. The bottom of the lifting beam 6 is connected to a lifting spreader beam 11. A seven-hole anchor is installed at the bottom of the lifting spreader beam. Six steel strands are threaded through the seven-hole anchor at each point. The ends of the steel strands are pre-tensioned by manual pulling. After pre-tensioning, clamps are installed for locking. It is essential to manually pull down the pre-tensioned steel strands to ensure that all six steel strands are under stress before installing clamps for locking. After all six steel strands at each point are stressed and locked with clamps, a steel strand compression sleeve is installed below the clamps to prevent them from falling off. The compression sleeve must be installed correctly to prevent the bottom clamps from falling off.

[0070] Start the lifting jacks to lift the Bailey bridge support structure as a whole. Lift as much as possible until the lifting beam comes into contact with the bottom plate of the adjacent turnout beams on both sides of the platform beam. Stop lifting and lock the steel strands of the lifting jacks.

[0071] According to the construction elevation, steel pipe pile supports, steel pipe column horizontal connections, steel pipe column wall connection supports, unloading devices and support beams are hoisted from bottom to top;

[0072] After the steel pipe pile support is installed, start the lifting jacks and activate the lowering function to lower the entire Bailey panel support structure onto the support beam. Then stop the lifting jacks from lowering the structure. This completes the overall lifting operation of the Bailey panel support structure.

[0073] Multiple U-shaped clamps were used to lock the lifting beam to the bottom of the Bailey panel support structure to ensure the stable suspension of the lifting beam and prepare for the subsequent overall lowering and dismantling of the Bailey panels.

[0074] At this point, the overall lifting and installation of the Bailey bridge supports for the platform beam construction is complete, and the subsequent beam pouring construction process will proceed.

[0075] Step Two: Platform Beam Construction and Pouring Process

[0076] Dismantle the lifting jacks, lifting steel strands, and anchoring devices;

[0077] Lay the bottom formwork of the platform beam, install the side formwork, and provide formwork support for the inner formwork 14 and outer formwork 15 of the platform beam to ensure the stability and firmness of the formwork structure. In accordance with the construction sequence, carry out the processes of tying the reinforcing bars of the platform beam, pouring concrete and tensioning the prestressing to complete the construction of the platform beam.

[0078] Step 3: Construction process of dismantling the Bailey bridge support structure under the platform beam

[0079] After the platform beam is poured, the unloading device on the steel pipe pile support is unloaded, so that the supporting beam and Bailey plate support structure on the unloading device are lowered as a whole, by about 12cm.

[0080] After the Bailey panel support structure is completely dismantled, the side formwork, platform beam inner formwork 14, and platform beam outer formwork 15 are removed.

[0081] When installing the flange plate of the platform beam, lower the jacks and reserve the steel strand passageway according to the position shown in the figure during the construction and pouring of the flange plate.

[0082] Install the lowering jack and fix it at an angle to ensure its vertical stability. Thread the lowering steel strands to the ground locking device. Install the steel strands; there are 4 lowering lifting points, with 6 steel strands at each point, for a total of 24 steel strands. Each steel strand is pre-tensioned using a special device to ensure that each steel strand is under balanced lifting force. After the steel strand anchoring device is installed, start the lowering jack lifting function to lift the anchoring device to the bottom of the lifting beam, completing the lifting operation.

[0083] A passageway for steel strands is reserved at the flange of the platform beam; and a passageway for steel strands is reserved at the flange of the turnout beam directly below the reserved hole on the platform beam; the reserved hole on the platform beam must be perpendicular to the center of the reserved hole on the turnout beam to ensure that the steel strands pass vertically through the reserved holes on the platform beam and the turnout beam.

[0084] Lift the anchoring device to the bottom of the lifting beam, continue the jack lifting operation, lift it by 20cm, so that the Bailey panel support structure is completely separated from the support beam, and stop the jack lifting operation;

[0085] The Bailey panel support structure is completely detached from the support beam. The support beam, unloading device, steel pipe pile support and buttress support are removed from top to bottom in the construction sequence.

[0086] Activate the lowering jack function to lower the Bailey panel as a whole support structure until it is safely landed.

[0087] After the Bailey bridge section support structure is lowered to the ground, the steel strand anchoring device is removed, the jacks for lowering the beam are removed, and the Bailey bridge section support structure is disassembled on the ground, completing all the construction work for the platform beam.

[0088] This solution effectively avoids all the drawbacks of traditional construction techniques, eliminates high-altitude operations, and improves construction safety and efficiency. The Bailey bridge support structure for this project is approximately 25 meters above the ground. The Bailey bridge support structure is lifted and lowered using a synchronous method. During the overall installation of the Bailey bridge sections, the flange plates of the adjacent turnout beams of the platform beam are used as the installation positions for continuous hydraulic lifting / lowering jacks to lift the Bailey bridge support structure as a whole. After the platform beam is poured, hydraulic synchronous lifting / lowering jacks are installed at the flange plates of the platform beam to lower the Bailey bridge support structure as a whole. The overall weight of the Bailey bridge support structure is approximately 150 tons, and the total load of the four lifting / lowering jacks is 400 tons, meeting the lifting load requirements.

[0089] The overall lifting structure of the Bailey bridge-supported structure for the cast-in-place platform beams improves construction safety: by avoiding high-altitude operations, it reduces the risks to personnel at heights and lowers the probability of accidents during construction; the use of advanced equipment such as continuous hydraulic lifting / lowering jacks simplifies the construction process, reduces manual operation, and thus improves construction efficiency. Optimized construction techniques reduce the need for manpower and save construction costs. Simultaneously, it avoids errors and rework that may occur in traditional construction, saving material and time costs; it ensures accuracy and stability during construction, thereby improving construction quality and reliability; and by optimizing construction methods, it reduces environmental impact and resource consumption, aligning with the concept of sustainable development. This lifting structure and method are not only suitable for the construction of platform beams but can also be extended to the construction of other similar structures, demonstrating excellent versatility and applicability.

[0090] In conclusion, this type of platform cast-in-place beam Bailey panel support structure and its construction method not only improve safety, efficiency, and quality, but also take into account cost and environmental factors, making it a construction solution with significant advantages.

[0091] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for installing and dismantling a Bailey bridge support structure for a cast-in-place beam on a platform, characterized in that, The platform includes a platform beam (1), on both sides of which are cast-in-place turnout beams (2). A lifting system is provided on the flange of the turnout beam of the platform beam (1). The lifting system includes a Bailey support (3), a steel strand (4), a lifting jack (5), a lifting beam (6), and an anchoring device (7). The lifting jack (5) is installed on the upper part of the flange of the turnout beam of the platform beam (1) and connected to the steel strand (4). The Bailey support (3) is located on the upper part of the lifting beam (6). The lifting beam (6) is connected to the steel strand (4) through the anchoring device (7). It also includes a steel pipe pile support (8) perpendicular to the turnout cast-in-place beam (2), and a dropping device (9) is provided on the upper part of the steel pipe pile support (8), and a support beam (10) that cooperates with the Bailey plate support (3) is provided on the upper part of the dropping device (9). Specifically, the steps include the following: Step 1: Overall lifting of the Bailey bridge support structure for the platform beams; Lifting jacks are installed on the flange plates of the turnout beams on both sides of the platform beam; a lifting beam is placed, perpendicular to the position where the steel strands on the turnout beam pass through the reserved holes; supporting Bailey bridge sections are installed on the upper part of the lifting beam; lifting jacks are installed at the flange plates of the turnout beams; the lifting beam is connected to the steel strands through anchoring devices; the lifting jacks are activated to lift the entire Bailey bridge support structure; according to the construction elevation, steel pipe pile supports, steel pipe column horizontal connections, steel pipe column wall connection supports, unloading devices, and supporting beams are hoisted from bottom to top; after the steel pipe pile supports are installed, the lifting jacks are activated to lower the entire Bailey bridge support structure to the upper part of the supporting beams, and the lifting jack lowering operation is stopped; the overall lifting operation of the Bailey bridge support structure is completed. Step 2: Construction and pouring of platform beams; Dismantle the lifting jacks, steel strands, and anchoring devices; Lay the platform formwork; carry out the reinforcement binding, concrete pouring and prestressing tensioning of the platform beams to complete the construction of the platform beams; Step 3: The Bailey bridge support structure of the platform beam is lowered and disassembled as a whole; After the platform beam is poured, the unloading device on the steel pipe pile support is unloaded, so that the supporting beam and Bailey support structure on the unloading device are lowered as a whole. After the entire Bailey panel support structure was dismantled, the formwork was removed. Lower the jacks when installing the platform beam flange plate; Lift the anchoring device to the bottom of the lifting beam and continue the jack lifting operation; The Bailey panel support structure was completely detached from the support beam, and the jacking operation was stopped; the support beam, unloading device, steel pipe pile support and support were dismantled from top to bottom. The lifting jacks were activated to lower the entire Bailey panel support structure until it was safely placed on the ground. The steel strand anchoring devices were removed, the jacks lowered to the beam surface were dismantled, and the Bailey bridge support structure was disassembled on the ground, completing all construction work for the platform beam.

2. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 1, characterized in that, In step one, when the lifting beam vertically corresponds to the turnout beam surface and lifts the steel strand through the reserved hole position, the lifting beam is supported by the beam to ensure a clear distance between the lifting beam and the ground.

3. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 1, characterized in that, In step one, when the lifting jack is installed at the flange of the turnout beam, an I-beam support is installed at the bottom of the lifting jack, and the lifting jack is fixed to the flange of the turnout beam of the platform beam by three diagonal bracing.

4. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 1, characterized in that, In step one, when the lifting beam is connected to the steel strands through the anchoring device, six steel strands are threaded through the steel strand channel at the top of the lifting jack to the anchoring device at the bottom of the lifting beam on the ground, and each steel strand is pre-tightened.

5. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 1, characterized in that, In step one, when the Bailey bridge support structure is lifted as a whole, if the lifting beam comes into contact with the bottom plate of the adjacent turnout beam on both sides of the platform beam, the lifting is stopped and the steel strand of the lifting jack is locked.

6. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 1, characterized in that, The lifting beam (6) is fixed to the bottom of the Bailey support (3) by a U-shaped clip.

7. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 1, characterized in that, The bottom of the lifting beam (6) is connected to the lifting spreader beam (11), and the lower part of the lifting spreader beam (11) is fixed with a seven-hole anchor (12). The steel strand (4) passes through the seven-hole anchor (12) and is fixed by the clamp.

8. The method for installing and dismantling the Bailey bridge support structure for cast-in-place beams of a platform according to claim 7, characterized in that, A steel strand extrusion sleeve (13) is installed below the clamp.

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