High-pier prestress vertical counter-pull prepressing bracket platform structure and construction method thereof

Abstract

The invention discloses a high-pier prestress vertical counter-pull pre-pressing bracket platform structure and a construction method thereof, and belongs to the technical field of bridge engineering. The structure comprises a bearing platform, a high-pier pier body is built on the bearing platform, a bracket platform is arranged on the high-pier pier body, and the bracket platform is connected with the bearing platform through a plurality of prestress vertical counter-pull mechanisms; the bracket platform comprises two bracket mechanisms, the two bracket mechanisms are symmetrically arranged on the two sides of a high-pier body, and a plurality of bailey beams are installed on the tops of the two bracket mechanisms correspondingly. The bracket mechanism comprises a plurality of brackets, a plurality of prestress vertical counter-pull mechanisms are arranged on the two sides of the high-pier body respectively, and the prestress vertical counter-pull mechanisms are arranged between the brackets in the bracket mechanism on the same side of the prestress vertical counter-pull mechanisms. A stable structural system can be formed, the actual working condition that the bracket mechanism is pre-pressed is achieved, the Bailey beam is prevented from influencing normal installation of the formwork, the construction workload, the construction cost and the safety risk are reduced, and cracking of a high-pier body is avoided.

Description

Technical Field

[0001] This invention relates to a prestressed vertical anti-tension preloading bracket platform structure for high piers and its construction method, belonging to the field of bridge engineering technology. Background Technology

[0002] The commonly used preloading methods for high-pier bridge support platforms are sandbags or water tanks. However, these two methods have drawbacks, such as requiring a large amount of sandbags and water, a large workload for hoisting and unloading sandbags or water tanks, a long preloading period, high preloading costs, and high safety risks.

[0003] Chinese patent documents with publication numbers CN111794127A and CN217026685U disclose a reaction force preloading system and preloading method for a 0-block support of an ultra-high cantilever beam, and a Bailey plate reaction force frame device for preloading the 0# bracket of a continuous beam. The preloading schemes adopted by the above two patents are to anchor the Bailey plates to the top of the pier body by pre-embedding anchoring devices, forming a reaction force frame, and applying prestress to the cantilever end of the Bailey plate by using a through-hole jack, thereby forming a reaction force on the bracket platform to complete the preloading.

[0004] The pre-compression solutions disclosed in the above two patents have the following shortcomings: First, if the anchoring device is pre-embedded in the pier body, when the through jacks at the free ends of the two cantilever sections of the Bailey section apply forces to the Bailey section at different times, it will generate a large bending moment, tensile force and secondary internal force on the pier body, which can easily cause cracks in the pier body and affect the stress safety of the pier body.

[0005] Secondly, when Bailey panels are installed on top of the pier as a reaction frame, since Bailey panels are mostly hinged structures, the free ends of the two cantilevered Bailey panels are prone to large deformation when the jack applies force. This causes the reaction force generated by the lower end of the jack on the bracket to decrease, resulting in the bracket preload value being less than the actual simulated preload value, ultimately making it impossible to achieve the actual preload condition of the bracket.

[0006] Third, installing Bailey panels as reaction frames on the top of the pier is problematic because Bailey panels are structurally similar to a kinematic system, which is an unstable structural system. Furthermore, installing Bailey panels as reaction frames on the top of the pier will occupy too much operating space on the top of the pier, and the presence of Bailey panels will affect the normal installation of the formwork.

[0007] Fourth, as a component that exists independently of the support platform, the Bailey panel has drawbacks in terms of high-altitude hoisting and dismantling, including large workload, high construction cost, long construction period and high safety risks. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention provides a high-pier prestressed vertical anti-tension preloading bracket platform structure and its construction method.

[0009] This invention is achieved through the following technical solution: A prestressed vertical anti-tension preloading bracket platform structure for high piers includes a pier cap, on which a high pier body is built. A bracket platform is provided on the high pier body near its upper end face. The bracket platform is connected to the pier cap through multiple prestressed vertical anti-tension mechanisms. The bracket platform includes two bracket mechanisms, which are symmetrically arranged on both sides of the high pier body and connected by multiple tie rods, which penetrate through the high pier body. Several Bailey beams are installed on the top of each of the two bracket mechanisms. The bracket mechanism includes multiple brackets, and multiple prestressed vertical anti-tension mechanisms are arranged on both sides of the high pier body, and the prestressed vertical anti-tension mechanisms are arranged between the brackets in the bracket mechanism on the same side.

[0010] The two brackets symmetrically arranged on both sides of the high pier body in the two bracket mechanisms are tightened and fixed to the pre-embedded corbel steel plate or pre-embedded corbel steel plate box on the high pier body by two tie components.

[0011] The bracket mechanism consists of multiple brackets arranged in parallel, with adjacent brackets connected by scissor braces.

[0012] The pull assembly includes a pull rod, and two nuts are threaded to both ends of the pull rod.

[0013] The high pier is equipped with an operating steel platform directly below the two bracket mechanisms.

[0014] The prestressed vertical anti-tension mechanism includes an anchoring assembly, a tie rod assembly, and a prestressing application assembly. The lower part of the anchoring assembly is embedded in the top of the pier. The prestressing application assembly is placed on all Bailey beams on the same bracket mechanism. The lower end of the tie rod assembly is connected to the anchoring assembly, the middle part passes through the bracket platform, and the upper end is connected to the prestressing application assembly.

[0015] The anchoring assembly includes two anchoring steel plates B, two pre-embedded threaded rods, and a double-panel anchoring beam. Both anchoring steel plates B are pre-embedded in the bearing platform, and multiple anchoring steel bars are welded to the bottom of each anchoring steel plate B. The double-panel anchoring beam is located directly above the two anchoring steel plates B and above the bearing platform. The lower parts of the two pre-embedded threaded rods are pre-embedded in the bearing platform and pass through the two anchoring steel plates B one by one. Anchoring nuts are threadedly connected to the upper and lower sides of the anchoring steel plates B on the pre-embedded threaded rods. Both pre-embedded threaded rods pass through the double-panel anchoring beam. A lower pad and an anchoring nut are arranged sequentially from top to bottom on the lower side of the double-panel anchoring beam, and an upper pad and two anchoring nuts are arranged sequentially from bottom to top on the upper side of the double-panel anchoring beam.

[0016] The prestressing application assembly includes a double-segment distribution beam, anchoring steel plate A, a through-hole jack, and a reaction anchoring steel plate. The double-segment distribution beam is placed on all Bailey beams on the same bracket mechanism and is arranged perpendicular to the Bailey beams. Anchoring steel plate A is placed on the double-segment distribution beam, the through-hole jack is placed on anchoring steel plate A, and the reaction anchoring steel plate is placed on the through-hole jack.

[0017] The tie rod assembly includes a threaded rod, the lower end of which passes through the double-panel anchor beam. A bearing plate and an anchor nut are sequentially provided on the threaded rod from top to bottom on the lower side of the double-panel anchor beam. The upper end of the threaded rod passes through the bracket platform, the double-panel distribution beam, the anchor steel plate A, the through-hole jack, and the reaction anchor steel plate from bottom to top, and extends to the top of the reaction anchor steel plate. An anchor nut is threadedly connected to the upper side of the anchor steel plate A on the threaded rod, and two anchor nuts are threadedly connected to the upper side of the reaction anchor steel plate.

[0018] A construction method for a high-pier prestressed vertical anti-tension preloading bracket platform structure includes the following steps: Step 1: Before pouring the foundation concrete, install the anchoring components in the designed position, and then pour the foundation concrete to fix the anchoring components and the foundation together to share the load. Step 2: Construct the pier body of the high pier, and install the pre-embedded corbel steel plate or pre-embedded corbel steel plate box when the pier body is constructed to the design elevation. After the construction of the high pier body is completed and its concrete strength reaches the design requirements, hoist the bracket platform. Step 3: Install the prestressing application assembly onto the Bailey beam and connect the prestressing application assembly and the anchoring assembly via tie rod assemblies; Step 4: Apply prestress to the tie rod assembly using the prestressing application component to tension it, so as to form an equivalent reaction force at the bottom of the prestressing application component and act on the bracket platform to achieve pre-stressing of the bracket platform; Step 5: Measure the settlement displacement of the bracket platform to obtain its settlement displacement value and elastic displacement value, in order to verify the safety and stability of the bracket platform. Step 6: After the support platform provides support for the formwork and the concrete on the formwork, remove the prestressing application components, tie rod components, and anchoring components.

[0019] The beneficial effects of this invention are as follows: First, the Bailey beams are installed on all the brackets of the bracket mechanism, and the prestressed vertical anti-tension mechanism is arranged between the brackets in the bracket mechanism on the same side. Therefore, when the Bailey beams are pressed down by the prestressed vertical anti-tension mechanism to pre-stress the bracket mechanism, the brackets on both sides of the prestressed vertical anti-tension mechanism can reliably support the Bailey beams, thereby forming a stable structural system.

[0020] Secondly, when the Bailey beam is preloaded by the prestressed vertical anti-tension mechanism, the brackets on both sides of the prestressed vertical anti-tension mechanism can reliably support the Bailey beam. Compared with the cantilever support method used for Bailey panels in the prior art, this can effectively avoid large deformation of the Bailey beam during preloading and also effectively avoid the attenuation of the preload pressure of the Bailey beam on the bracket mechanism during preloading. This ensures that the preload pressure value on the bracket mechanism is basically consistent with the actual simulated preload pressure value, thus ensuring that the actual working condition of the bracket mechanism preloading is achieved.

[0021] Third, installing Bailey beams on two bracket mechanisms on both sides of the high pier body can prevent Bailey beams from occupying the top operating space of the high pier body, thereby preventing Bailey beams from affecting the normal installation of formwork.

[0022] Fourth, the Bailey beams are installed on two bracket mechanisms on both sides of the high pier. The two bracket mechanisms are fixed together by multiple tie rods to form a bracket platform. The Bailey beams themselves are part of the bracket platform, eliminating the need for separate high-altitude hoisting and dismantling of Bailey panels or beams. This greatly reduces the workload, construction costs, and safety risks, and shortens the construction period for hoisting and dismantling.

[0023] Fifth, the lower end of the prestressed vertical anti-tension mechanism is connected to the pier cap, and the upper end is connected to the bracket platform. When the prestressed vertical anti-tension mechanism applies force to press down on the Bailey beams on both sides of the high pier body to pre-stress the bracket platform, the prestressed vertical anti-tension mechanism directly transmits the tension to the pier cap, rather than directly to the high pier body, so as to avoid generating large tension and secondary internal forces on the high pier body, thereby preventing cracking of the high pier body. At the same time, by using the prestressed vertical anti-tension mechanism to press down on the bracket platform, the actual prestress value can be accurately made to be close to the theoretically required simulated prestress value, and the prestress settlement value of the bracket platform can be effectively obtained. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view along AA; Figure 3 for Figure 1 Sectional view along BB; Figure 4 for Figure 1 Sectional view along CC; Figure 5 for Figure 4 A magnified view of the area at point G; Figure 6 This is a schematic diagram of the assembly structure of the anchoring component and the precision threaded rod of the present invention; Figure 7 for Figure 6 Sectional view along DD; Figure 8 for Figure 6 Sectional view along EE; Figure 9 This is a schematic diagram of the bracket structure of the present invention.

[0025] In the diagram: 1-Double-segment distribution beam, 2-Precision threaded rod, 3-Anchoring steel plate A, 4-Anchoring nut, 5-Reaction anchoring steel plate, 6-Bailey beam, 7-Bracket, 701-Horizontal bar, 702-Web bar, 703-Diagonal bar, 8-Tie assembly, 9-Operating steel platform, 10-Anchoring assembly, 101-Double-segment anchoring beam, 102-Upper pad plate, 103-Embedded precision threaded rod, 104-Lower pad plate, 105-Bearing plate, 106-Anchoring steel plate B, 107-Multiple anchoring steel bars, 11-Pier body, 12-Pile cap, 13-Through-through jack, 14-Scissor brace. Detailed Implementation

[0026] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0027] like Figures 1 to 9 As shown, the present invention discloses a prestressed vertical anti-tension preloading bracket platform structure for high piers, including a pier cap 12, on which a high pier body 11 is built. A bracket platform is provided on the high pier body 11 near its upper end face. The bracket platform is connected to the pier cap 12 through multiple prestressed vertical anti-tension mechanisms. The bracket platform includes two bracket mechanisms, which are symmetrically arranged on both sides of the high pier body 11 and connected by multiple tie rods 8. The tie rods 8 penetrate the high pier body 11, and multiple Bailey beams 6 are installed on the top of the two bracket mechanisms respectively. The bracket mechanism includes multiple brackets 7. Multiple prestressed vertical anti-tension mechanisms are arranged on both sides of the high pier body 11, and the prestressed vertical anti-tension mechanisms are arranged between the brackets 7 in the bracket mechanism on the same side.

[0028] Specifically, the present invention has the following technical effects: First, the Bailey beam 6 is installed on all the brackets 7 of the bracket mechanism, and the prestressed vertical anti-tension mechanism is arranged between the brackets 7 and the brackets 7 in the bracket mechanism on the same side. Therefore, when the Bailey beam 6 is pressed down by the prestressed vertical anti-tension mechanism to pre-stress the bracket mechanism, the brackets 7 on both sides of the prestressed vertical anti-tension mechanism can reliably support the Bailey beam 6, thereby forming a stable structural system.

[0029] Secondly, when the Bailey beam 6 is preloaded by the prestressed vertical anti-tension mechanism, the brackets 7 on both sides of the prestressed vertical anti-tension mechanism can reliably support the Bailey beam 6. Compared with the cantilever support method used for Bailey panels in the prior art, this can effectively avoid large deformation of the Bailey beam 6 during preloading and also effectively avoid the attenuation of the preload pressure of the Bailey beam 6 on the bracket mechanism during preloading. This ensures that the preload pressure value on the bracket mechanism is basically consistent with the actual simulated preload pressure value, thus ensuring that the actual working condition of the bracket mechanism preloading is achieved.

[0030] Third, installing Bailey beam 6 on the two bracket mechanisms on both sides of the high pier body 11 can prevent Bailey beam 6 from occupying the top operating space of the high pier body 11, thereby preventing Bailey beam 6 from affecting the normal installation of the formwork.

[0031] Fourth, the Bailey beam 6 is installed on two bracket mechanisms on both sides of the high pier body 11. The two bracket mechanisms are fixed together by multiple tie components 8 to form a bracket platform. The Bailey beam 6 itself is a component of the bracket platform, eliminating the need for separate high-altitude hoisting and dismantling of Bailey panels or Bailey beam 6. This greatly reduces the workload, construction cost, and safety risks, and shortens the construction period of the hoisting and dismantling process.

[0032] Fifth, the lower end of the prestressed vertical anti-tension mechanism is connected to the pier cap 12, and the upper end is connected to the bracket platform. When the prestressed vertical anti-tension mechanism applies force to press down on the Bailey beams 6 on both sides of the pier body 11 to pre-stress the bracket platform, the prestressed vertical anti-tension mechanism directly transmits the tension to the pier cap 12, rather than directly to the pier body 11, so as to avoid generating large tension and secondary internal forces on the pier body 11, thereby preventing cracking of the pier body 11. At the same time, since the Bailey beams 6 are pressed down by the prestressed vertical anti-tension mechanism to pre-stress the bracket mechanism, the brackets 7 on both sides of the prestressed vertical anti-tension mechanism can form reliable support for the Bailey beams 6, so as to avoid generating large bending moments on the pier body 11 and ensure the stress safety of the pier body 11.

[0033] Specifically, the Bailey beam 6 has a height of 150cm; for example... Figure 9 As shown, the bracket 7 includes a horizontal bar 701, a web bar 702, and a diagonal bar 703.

[0034] The two brackets 7, which are symmetrically arranged on both sides of the high pier body 11, are tightened and fixed to the pre-embedded corbel steel plate or pre-embedded corbel steel plate box on the high pier body 11 by two tie components 8.

[0035] The bracket mechanism has multiple brackets 7 arranged in parallel, and two adjacent brackets 7 are connected by scissor braces 14.

[0036] The pull assembly 8 includes a pull rod, and two nuts are threaded to both ends of the pull rod.

[0037] The high pier body 11 is equipped with operating steel platforms 9 directly below the two bracket mechanisms.

[0038] The prestressed vertical anti-tension mechanism includes an anchoring component 10, a tie rod component, and a prestressing application component. The lower part of the anchoring component 10 is embedded in the top of the pier 12. The prestressing application component is placed on all Bailey beams 6 on the same bracket mechanism. The lower end of the tie rod component is connected to the anchoring component 10, the middle part passes through the bracket platform, and the upper end is connected to the prestressing application component.

[0039] The anchoring assembly 10 includes two anchoring steel plates B106, two pre-embedded threaded rods 103, and a double-panel anchoring beam 101. Both anchoring steel plates B106 are pre-embedded within the bearing platform 12, and multiple anchoring steel bars 107 are welded to the bottom of each anchoring steel plate B106. The double-panel anchoring beam 101 is located directly above the two anchoring steel plates B106 and above the bearing platform 12. The lower parts of the two pre-embedded threaded rods 103 are pre-embedded within the bearing platform 12, and are aligned one-to-one with the other. The anchoring rods should penetrate both anchoring steel plates B106, and the pre-embedded threaded rods 103 are threaded with anchoring nuts 4 on both the upper and lower sides of the anchoring steel plates B106. Both pre-embedded threaded rods 103 penetrate the double-panel anchoring beams 101. On the lower side of the double-panel anchoring beams 101, the pre-embedded threaded rods 103 are provided with a lower pad 104 and anchoring nuts 4 from top to bottom, and on the upper side of the double-panel anchoring beams 101, an upper pad 102 and two anchoring nuts 4 are provided from bottom to top.

[0040] Specifically, the double-panel anchor beam 101 adopts a 40a double-panel anchor beam, the size of the lower pad 104 is 13cm x 13cm x 2cm, the size of the anchor steel plate B106 is 33cm x 33cm x 2cm, and the anchor steel bar 107 is a round steel bar with a diameter of 1.6cm and an L-shaped shape.

[0041] The prestressing application assembly includes a double-span distribution beam 1, an anchoring steel plate A3, a through-hole jack 13, and a reaction anchoring steel plate 5. The double-span distribution beam 1 is placed on all Bailey beams 6 on the same bracket mechanism and is arranged perpendicular to the Bailey beams 6. The anchoring steel plate A3 is placed on the double-span distribution beam 1, the through-hole jack 13 is placed on the anchoring steel plate A3, and the reaction anchoring steel plate 5 is placed on the through-hole jack 13. The dimensions of the reaction anchoring steel plate 5 are 74cm x 74cm x 2cm.

[0042] The tie rod assembly includes a threaded rod 2. The lower end of the threaded rod 2 passes through the double-panel anchor beam 101. A bearing plate 105 and an anchor nut 4 are sequentially arranged on the threaded rod 2 below the double-panel anchor beam 101 from top to bottom. The upper end of the threaded rod 2 passes sequentially from bottom to top through the bracket platform, the double-panel distribution beam 1, the anchor steel plate A3, the through-hole jack 13, and the reaction anchor steel plate 5, extending above the reaction anchor steel plate 5. An anchor nut 4 is threadedly connected to the upper side of the anchor steel plate A3 on the threaded rod 2, and two anchor nuts 4 are threadedly connected to the upper side of the reaction anchor steel plate 5. The bearing plate 105 has dimensions of 17cm x 17cm x 2cm, and the threaded rod 2 has a diameter of 3.2cm.

[0043] A construction method for a high-pier prestressed vertical anti-tension preloading bracket platform structure includes the following steps: Step 1: Before pouring the concrete for the foundation 12, install the anchoring component 10 in the designed position, and then pour the concrete for the foundation 12 so that the anchoring component 10 and the foundation 12 are fixed together to bear the load.

[0044] Step 2: Construct the pier body 11 of the high pier, and install the pre-embedded corbel steel plate or pre-embedded corbel steel plate box when the pier body 11 is constructed to the design elevation. After the construction of the pier body 11 is completed and its concrete strength reaches the design requirements, hoist the bracket platform.

[0045] Step 3: Install the prestressing application component onto the Bailey beam 6, and connect the prestressing application component and the anchoring component 10 through the tie rod assembly.

[0046] Step 4: Apply prestress to the tie rod assembly using the prestressing application component to tension it, thereby creating an equivalent reaction force at the bottom of the prestressing application component that acts on the bracket platform, achieving pre-compression of the bracket platform. Specifically, apply prestress to the threaded rod 2 using the through-hole jack 13 to tension it, thereby creating an equivalent reaction force at the bottom of the prestressing application component that acts on the bracket platform, achieving pre-compression of the bracket platform.

[0047] Step 5: Measure the settlement displacement of the bracket platform to obtain its settlement displacement value and elastic displacement value, in order to verify the safety and stability of the bracket platform.

[0048] Step 6: After the support platform provides support for the formwork and the concrete on the formwork, remove the prestressing application components, tie rod components, and anchoring components 10.

Claims

1. A high-pier prestressed vertical anti-tension preloading bracket platform structure, characterized in that: Includes a pier cap (12), on which a high pier body (11) is built, and a bracket platform is provided on the high pier body (11) near its upper end face. The bracket platform is connected to the pier cap (12) through multiple prestressed vertical anti-tension mechanisms. The bracket platform includes two bracket mechanisms, which are symmetrically arranged on both sides of the high pier body (11) and connected by multiple tie rods (8). The tie rods (8) penetrate the high pier body (11), and several Bailey beams (6) are installed on the top of the two bracket mechanisms respectively. The bracket mechanism includes multiple brackets (7), and multiple prestressed vertical anti-tension mechanisms are arranged on both sides of the high pier body (11), and the prestressed vertical anti-tension mechanism is arranged between the brackets (7) and the brackets (7) in the bracket mechanism on the same side.

2. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 1, characterized in that: The two brackets (7) symmetrically arranged on both sides of the high pier body (11) of the two bracket mechanisms are tightened and fixed to the pre-embedded corbel steel plate or pre-embedded corbel steel plate box on the high pier body (11) by two tie components (8).

3. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 1, characterized in that: The bracket mechanism has multiple brackets (7) arranged in parallel, and two adjacent brackets (7) are connected by scissor braces (14).

4. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 1, characterized in that: The pull assembly (8) includes a pull rod, and two nuts are threaded to both ends of the pull rod.

5. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 1, characterized in that: The high pier body (11) is equipped with an operating steel platform (9) directly below the two bracket mechanisms.

6. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 2, characterized in that: The prestressed vertical anti-tension mechanism includes an anchoring component (10), a tie rod component, and a prestressing application component. The lower part of the anchoring component (10) is embedded in the top of the pier (12). The prestressing application component is placed on all Bailey beams (6) on the same bracket mechanism. The lower end of the tie rod component is connected to the anchoring component (10), the middle part passes through the bracket platform, and the upper end is connected to the prestressing application component.

7. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 6, characterized in that: The anchoring assembly (10) includes two anchoring steel plates B (106), two pre-embedded threaded rods (103), and a double-panel anchoring beam (101). Both anchoring steel plates B (106) are pre-embedded in the bearing platform (12), and multiple anchoring steel bars (107) are welded to the bottom of both anchoring steel plates B (106). The double-panel anchoring beam (101) is located directly above the two anchoring steel plates B (106) and above the bearing platform (12). The lower parts of the two pre-embedded threaded rods (103) are pre-embedded in the bearing platform (12) and are aligned one-to-one with each other. The two anchoring steel plates B (106) should be connected through, and the pre-embedded threaded rods (103) are threaded with anchoring nuts (4) on both the upper and lower sides of the anchoring steel plates B (106). The two pre-embedded threaded rods (103) are connected through the double anchoring beams (101). The pre-embedded threaded rods (103) are provided with a lower pad (104) and an anchoring nut (4) on the lower side of the double anchoring beams (101) from top to bottom, and an upper pad (102) and two anchoring nuts (4) are provided on the upper side of the double anchoring beams (101) from bottom to top.

8. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 7, characterized in that: The prestressing application assembly includes a double-splitting distribution beam (1), an anchoring steel plate A (3), a through-hole jack (13), and a reaction anchoring steel plate (5). The double-splitting distribution beam (1) is placed on all Bailey beams (6) on the same bracket mechanism and is arranged perpendicular to the Bailey beams (6). The anchoring steel plate A (3) is placed on the double-splitting distribution beam (1), the through-hole jack (13) is placed on the anchoring steel plate A (3), and the reaction anchoring steel plate (5) is placed on the through-hole jack (13).

9. The high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 8, characterized in that: The tie rod assembly includes a threaded rod (2), the lower end of which passes through the double-panel anchor beam (101). The threaded rod (2) has a bearing plate (105) and an anchor nut (4) arranged sequentially from top to bottom on the lower side of the double-panel anchor beam (101). The upper end of the threaded rod (2) passes sequentially from bottom to top through the bracket platform, the double-panel distribution beam (1), the anchor plate A (3), the through jack (13), and the reaction anchor plate (5), and extends to the top of the reaction anchor plate (5). The threaded rod (2) has an anchor nut (4) threadedly connected to the upper side of the anchor plate A (3), and two anchor nuts (4) threadedly connected to the upper side of the reaction anchor plate (5).

10. A construction method for a high-pier prestressed vertical anti-tension preloading bracket platform structure as described in claim 6, characterized in that: Includes the following steps: Step 1: Before pouring the concrete of the foundation (12), install the anchoring component (10) in the designed position, and then pour the concrete of the foundation (12) so that the anchoring component (10) and the foundation (12) are fixed together to bear the force. Step 2: Construct the pier body (11) of the high pier, and install the pre-embedded corbel steel plate or pre-embedded corbel steel plate box when the high pier body (11) is constructed to the design elevation position. After the high pier body (11) is completed and its concrete strength reaches the design requirements, hoist the bracket platform. Step 3: Install the prestressing application assembly onto the Bailey beam (6) and connect the prestressing application assembly and the anchoring assembly (10) through the tie rod assembly. Step 4: Apply prestress to the tie rod assembly using the prestressing application component to tension it, so as to form an equivalent reaction force at the bottom of the prestressing application component and act on the bracket platform to achieve pre-stressing of the bracket platform; Step 5: Measure the settlement displacement of the bracket platform to obtain its settlement displacement value and elastic displacement value, in order to verify the safety and stability of the bracket platform. Step 6: After the support is formed on the formwork and the concrete on the formwork by the bracket platform, remove the prestressing application components, tie rod components and anchoring components (10).

Images