Cable-stayed bridge tower-beam synchronous system and construction method

Abstract

This invention relates to a synchronous tower-beam system and construction method for cable-stayed bridges. During the automatic hydraulic climbing formwork construction of the main tower, a buffer device is installed; during the front support hanging basket construction of the main beam, a concrete spraying and curing system is installed; a liftable truss structure is used for rapid formwork support; an adjustable temporary lateral support system for the main tower includes a fall protection platform; and steel pipe column positioning devices are installed on the temporary Z-braces. The beneficial effects of this invention are: the buffer device during the automatic hydraulic climbing formwork construction reduces impact force, increases the service life of the device, reduces construction costs, and allows for simultaneous construction of the main beam and main tower; the concrete spraying and curing system meets the requirements for rapid curing and protection of the main beam concrete; the use of a liftable truss structure for rapid formwork support reduces construction difficulty; and the fall protection platform effectively improves the safety factor of on-site construction.

Description

Technical Field

[0001] This invention relates to a bridge tower and beam synchronous construction system, and more particularly to a cable-stayed bridge tower and beam synchronous construction system and construction method. Background Technology

[0002] In recent years, cable-stayed bridges have seen rapid development in the bridge engineering field due to their superior structural performance and ability to achieve large spans. During construction, effective construction control is crucial to ensure that the internal forces and deformation of the completed bridge meet design requirements.

[0003] Generally, the conventional construction method for cable-stayed bridges is to construct the towers first, followed by the main girder. With the development of science and technology, more and more methods have emerged for cable-stayed bridge construction. Optimizing the construction process and improving construction progress and technical levels are crucial for the successful construction of cable-stayed bridges. One new method is simultaneous tower-girder construction, where the main girder and tower are constructed simultaneously after the main tower has reached a certain height. Compared to traditional methods, simultaneous construction offers advantages such as shorter construction time and cost savings, thus creating significant economic value. However, simultaneous tower-girder construction also presents many challenges. For example, the hydraulic climbing formwork device experiences significant impact during construction, which can easily damage the device; the main girder formwork is difficult to support; the concrete curing during the front support formwork construction is challenging; and the temporary cross bracing used in simultaneous tower-girder construction has a large span. Therefore, strict control and improvement of the simultaneous construction process are necessary.

[0004] In summary, the current goal for the synchronous construction system of cable-stayed bridge towers and beams is to find a synchronous construction system and method that features fast construction speed, high precision of the formwork system, convenient concrete curing, and a high construction safety factor. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a synchronous system for cable-stayed bridge towers and beams and a construction method thereof.

[0006] This cable-stayed bridge tower-beam synchronous system includes: a buffer device, a concrete spraying and curing system, a rapid formwork system for the liftable truss structure, an adjustable temporary lateral support system for the main tower, an automatic control hydraulic climbing formwork system, and a steel pipe column positioning device.

[0007] The buffer device includes a fixed connecting block, an elastic buffer column, and a movable slider. The fixed connecting block is connected to the main working platform.

[0008] The concrete spray curing system includes water pipes; the water pipes are fixed to the load-bearing beams, forming a spray ring between the longitudinal beams and transverse beams of the hanging basket;

[0009] The rapid formwork system for liftable truss structures includes truss structure templates; hydraulic jacks are installed between the truss structure templates and the load-bearing beams; the outer formwork of the box girder is equipped with box girder outer formwork vertical support components and box girder outer formwork diagonal support components; the bottom formwork of the box girder is equipped with box girder bottom formwork support components.

[0010] The adjustable temporary lateral support system for the main tower includes a fall arrest platform; the fall arrest platform is connected to the main tower by welding second fixed connectors at both ends;

[0011] The steel pipe column positioning device includes a positioning steel plate; two positioning steel plates are spliced ​​from the left and right sides of the I-beam respectively; vertical positioning threaded grooves are welded onto the positioning steel plates; the two ends of the steel pipe column are fixed to the vertical positioning threaded grooves by threads.

[0012] As a preferred embodiment, the buffer device is welded together from a fixed connecting block, an elastic buffer column, and a movable slider. The fixed connecting block has a pre-drilled fixing hole and is connected to the main working platform by fastening bolts.

[0013] As a preferred embodiment, the concrete spray curing system further includes water pipe adapters, nozzles, and switch valves; the water pipes are fixed to the load-bearing beams through pre-reserved pipe openings, and water pipe adapters are provided at both ends of the water pipes; several water pipes form a spray ring between the longitudinal beams and the transverse beams of the hanging basket; a water pipe is also provided on one of the water pipe adapters to connect to the spray ring, and the bottom of the water pipe is connected to a water pump; a switch valve is provided on the water pipe.

[0014] As a preferred embodiment: the aforementioned rapid formwork system for the liftable truss structure further includes force transmission supports; force transmission supports are welded to the bottom of the truss, and the force transmission supports are fixed to the load-bearing beams with bolts; the horizontal and vertical members of the overall truss structure are connected to the truss structure template with bolts; a lifting point is set on the load-bearing beam, and each lifting point uses a hydraulic jack to lift or lower the truss structure template; the outer formwork of the box girder is provided with a box girder outer formwork vertical support assembly and a box girder outer formwork diagonal support assembly, wherein the box girder outer formwork vertical support assembly includes a vertical support, a right-angle connecting plate and a horizontal support, the vertical support and the horizontal support are fixed together by a right-angle connecting plate, and the vertical support is connected to the hanging basket longitudinal beam and the box girder outer formwork with bolts; the box girder outer formwork vertical support assembly includes a support diagonal rod and a first fixed connector, the support diagonal rod is connected to the first fixed connector through an adjustable thread, and the first fixed connector is fixed to the hanging basket longitudinal beam with fastening bolts; the bottom formwork of the box girder is provided with a box girder bottom formwork support assembly, and the box girder bottom formwork support assembly is connected to the hanging basket horizontal beam and the box girder bottom formwork with bolts.

[0015] Preferably, the adjustable temporary lateral support system for the main tower further includes safety wire ropes, diagonal braces, diagonal brace fixing components, and fixing bolts; safety wire ropes are installed between the main towers via pre-embedded hooks; the fall arrest platform includes I-beams, guardrail reinforcement bars, lifting lugs, sliders, slide rails, temporary Z-braces, fixing connectors, and bamboo plywood, wherein the I-beams are equipped with guardrail reinforcement bars, and both ends of the I-beams are connected to the main towers via fixing connectors. The I-beams are connected and fixed to the slide rails via fastening bolts, and sliders are installed on the slide rails. The sliders are fixed to the temporary Z-braces via bolts, and bamboo plywood is laid on the temporary Z-braces; diagonal braces are provided below the fall arrest platform, diagonal brace fixing components are provided on the main towers, and diagonal brace fixing components are welded to the I-beams. The diagonal braces are connected to the diagonal brace fixing components on the main towers and the fall arrest platform via fixing bolts; lifting lugs are welded to the I-beams.

[0016] Preferably, the steel pipe column positioning device further includes steel plate fixing holes; the steel pipe column positioning device is composed of two identical parts spliced ​​together, with two positioning steel plates respectively set on the left and right sides of the I-beam of the temporary Z-bracing; the positioning steel plates are provided with steel plate fixing holes, which are fixedly connected to the I-beam by fastening bolts; vertical positioning threaded grooves are welded on the positioning steel plates; the beginning and end of the steel pipe column are provided with threads in opposite directions, and the steel pipe column is fixed to the vertical positioning threaded grooves by the threads.

[0017] The construction method for this cable-stayed bridge tower-beam synchronous system includes the following steps:

[0018] Step 1: Connect the buffer device to the main working platform; install the climbing formwork embedded parts, wall attachment devices and climbing frame in the initial pouring section; install the lifting guide rail and hydraulic system; hoist the lifting platform, formwork platform, rebar tying platform and main working platform;

[0019] Step 2: Move the formwork platform and rebar tying platform backward using the sliding device, lift the support frame, and tie the tower column rebar; move the formwork platform and rebar tying platform forward to pour concrete tower columns; continue installing the climbing formwork embedded parts and lift the guide rails using the hydraulic system;

[0020] Step 3: Assemble the hanging basket and use the anchoring system to complete the installation of the front support hanging basket system; hoist the truss structure onto the front support hanging basket and raise the truss structure formwork; pour concrete, tension the stay cables, and then use the concrete spray curing system to spray water for curing.

[0021] Step 4: Lower the truss structure template, move the track forward and install the traveling anti-roll wheels, and use hydraulic jacks to put the hanging basket into place;

[0022] Step 5: Repeat steps 2 to 4, simultaneously cycling the automatic control hydraulic climbing formwork system and the front support hanging basket system until the main tower height and main beam length meet the construction requirements.

[0023] Step 6: Install the adjustable temporary transverse support system for the main tower; install steel pipe columns between the first and second temporary Z-shaped cross braces using a steel pipe column positioning device.

[0024] Step 7: Secure the corbel support and assemble the Bailey beam. After the bamboo plywood formwork is completed, pour the upper crossbeam.

[0025] As a preferred option, in step one: when installing the wall-mounted device, the guide rail bracket is fixed to the concrete surface using load-bearing bolts, and the wall-mounted bracket is installed; then the upper and lower reversing boxes and hydraulic cylinders are installed, and the lifting guide rail and hydraulic system are installed; the climbing frame is set according to the position shown in the layout drawing. First, the hoisting platform, formwork platform, rebar binding platform and main working platform are assembled on the ground assembly platform. Then, hoisting equipment is used to lift and install them to the designated position, and the angle is adjusted using the frame bearing diagonal bracing rods to make the frame bearing beams in a horizontal position.

[0026] As a preferred option, in step two: the template platform and the rebar binding platform are moved backward by the sliding device, and the impact force during the movement is reduced by the buffer device; the guide rail tail support is removed in preparation for the next turnover; the support is lifted by the hydraulic through-hole jack; the tower column rebar binding construction is carried out on the rebar binding platform; and the climbing formwork embedded parts are set.

[0027] The formwork platform and rebar binding platform are moved forward by the sliding device, and the buffer device moves forward synchronously using the elastic buffer column. The tower column formwork is made of steel formwork, and the steel formwork is connected by tie rods. After the formwork structure is completed, the concrete tower column is poured according to the process plan.

[0028] After the concrete is poured, cover the surface with a film and sprinkle water to keep it moist and cured; once the concrete structure strength exceeds 15MPa, begin the demolding process; at this time, move the steel formwork back 50-60cm and lock it with pins.

[0029] As a preferred option, the hanging basket is assembled on the assembly platform. The hanging basket includes hydraulic jacks, traveling anti-roll wheels, hanging basket anchoring system, thrust mechanism, jacking mechanism, bearing platform, cable stays, hanging basket longitudinal beams and hanging basket transverse beams; the hanging basket main beams are lifted into place using the hanging basket anchoring system, and then C-shaped hooks are installed using tower cranes and crawler cranes. After meeting the safety lifting requirements, the installation of the front support hanging basket system is completed.

[0030] The front support hanging basket is equipped with four load-bearing beams at the overall truss support legs. The two sides are liftable load-bearing beams and the middle is a fixed load-bearing beam. After the truss structure template is raised to the designated position, a pin is inserted between the movable load-bearing beam and the hanging basket crossbeam. The overall truss support leg at the fixed load-bearing beam is fixedly connected to the force transmission support.

[0031] When adjusting the truss structure formwork descent, remove the pin between the movable load-bearing beam and the hanging basket crossbeam, adjust the height of the truss structure support legs at the fixed load-bearing beam, and remove the force transmission supports. Then, use hydraulic jacks to lower the truss structure formwork to the designated position. Finally, insert pins between the movable load-bearing beam and the hanging basket crossbeam for fixation. After the system conversion and truss structure descent are completed, remove the box girder formwork, remove the front, middle, and rear anchor bolt groups in the anchoring system, move the track forward and fix it, and lay mortar and steel plates under the track for leveling. Install the traveling anti-roll wheels; after completion, lower the hanging basket, remove the front outer anchor bolt group and thrust mechanism; use a total station to measure and mark the hanging basket travel termination line and bridge centerline of the next segment to determine the position of the hanging basket in the longitudinal direction of the bridge; use hydraulic jacks to push the C-shaped hooks to move the hanging basket forward into place, install the outer anchor bolt group in the front anchoring system, slowly and synchronously lift the front outer anchor bolt group, while the elevation adjustment mechanism screw lowers and the hanging basket rises, install the thrust mechanism, operate the thrust jacks to position the hanging basket in the plane, and the forward movement of the hanging basket can be realized.

[0032] The beneficial effects of this invention are:

[0033] 1) The cable-stayed bridge tower-beam synchronous system of the present invention is equipped with a buffer device during the automatic control hydraulic climbing formwork construction process, which reduces the impact force, improves the working life of the device, reduces the construction cost, and allows the construction of the main beam and the main tower to be carried out simultaneously.

[0034] 2) The present invention's cable-stayed bridge tower-beam synchronous system is equipped with a concrete spraying curing system during the construction of the hanging basket at the front support point, which can meet the needs of rapid curing and protection of the main beam concrete of the cable-stayed bridge and effectively ensure the construction quality of the main beam of the cable-stayed bridge.

[0035] 3) The synchronous tower-beam system of the cable-stayed bridge of the present invention adopts a rapid formwork system with a liftable truss structure, which reduces the construction difficulty and increases the construction speed.

[0036] 4) The cable-stayed bridge tower-beam synchronous system of the present invention sets up a fall-prevention platform in the adjustable temporary transverse support system of the main tower, which effectively improves the safety factor of on-site construction.

[0037] 5) The present invention provides a steel pipe column positioning device on the temporary Z-bracing of the cable-stayed bridge tower-beam synchronous construction system, which realizes the precise positioning of the steel pipe column and solves the problem of excessive span of the cross bracing during the synchronous construction of the tower and beam. Attached Figure Description

[0038] Figure 1 is a schematic diagram of the construction elevation of the automatic control hydraulic climbing formwork system (wherein) Figure 1-a 1-b is an elevation view of the automatic control hydraulic climbing formwork system installation; 1-c is an elevation view of the relocation of the formwork platform and rebar tying platform; 1-d is an elevation view of the main tower rebar tying; and 1-d is an elevation view of the formwork support and concrete pouring.

[0039] Figure 2 This is a schematic diagram of the sliding device structure;

[0040] Figure 3 This is a side view of the front pivot basket system;

[0041] Figure 4 This is a schematic diagram of the rapid formwork system architecture of the liftable truss structure;

[0042] Figure 5 This is a schematic diagram of the box girder formwork support structure;

[0043] Figure 6 This is a schematic diagram of a concrete spray curing system.

[0044] Figure 7 This is a plan view of a concrete spray curing system;

[0045] Figure 8 This is a schematic diagram of the elevation of an adjustable temporary lateral support system;

[0046] Figure 9 This is a schematic diagram of an adjustable temporary lateral support system structure;

[0047] Figure 10 This is a schematic diagram of an adjustable temporary lateral support system.

[0048] Figure 11 This is a schematic diagram of the temporary support installation elevation;

[0049] Figure 12 This is a schematic diagram of the steel pipe column positioning device.

[0050] Figure 13 This is an exploded view of the steel pipe column positioning device structure;

[0051] Figure 14 This is a flowchart of the construction process of the present invention.

[0052] In the diagram: 1-Guide rail tail support, 2-Lifting guide rail, 3-Hanging platform, 4-Hydraulic control platform, 5-Frame bearing diagonal brace, 6-Frame bearing crossbeam, 7-Buffer device, 8-Sliding device, 9-Formwork platform, 10-Rebar binding platform, 11-Steel formwork, 12-Guide rail bracket, 13-Climbing formwork embedded part, 14-Main working platform, 15-Frame bearing upright, 16-Hydraulic through-hole jack, 17-Wall attachment device, 18-Concrete tower column, 19-Tower column reinforcement, 20-Tie rod, 21-Fasting bolt, 22-Fixing connection block, 23-Elastic buffer column, 24-Moving slider. 25-Truss structure, 26-Hydraulic jack, 27-Box girder formwork, 28-Tie rod, 29-Traveling anti-roller, 30-Anchoring system, 31-Thrust mechanism, 32-Lifting mechanism, 33-Bearing platform, 34-Stay cable, 35-Hanging basket longitudinal beam, 36-Truss structure formwork, 37-Box girder outer formwork, 38-Box girder outer formwork vertical support assembly, 39-Box girder outer formwork diagonal support assembly, 40-Box girder bottom formwork, 41-Box girder bottom formwork support assembly, 42-Truss, 43-Force transmission support, 44-Hanging basket crossbeam, 45-Bearing beam, 46-Supporting diagonal rod, 47-First fixed connector, 48-Vertical support, 49-Right angle connecting plate, 50-Horizontal support, 51-Concrete spray curing system, 52-Water pipe adapter, 53-Water pipe, 54-Sprinkler head, 55-Switch valve, 56-Safety wire rope, 57-Hook, 58-Diagonal brace, 59-Diagonal brace fixing component, 60-Fixing bolt, 61-Main tower, 62-Fall protection platform, 63-I-beam, 64-Guardrail reinforcement, 65-Lifting lug, 66-Slider, 67-Slide rail, 68-Temporary Z-shaped cross brace, 69-Second fixed connection component, 70-Bamboo plywood, 71-Bailey beam, 72-Load-bearing beam, 73-Corner support, 74-Threaded steel, 75-Front support hanging basket system, 76-First temporary Z-shaped cross brace, 77-Steel pipe column, 78-Second temporary Z-shaped cross brace, 79-Hydraulic climbing formwork system, 80-Steel pipe column positioning device, 81-Positioning steel plate, 82-Vertical positioning threaded groove, 83-Thread, 84-Steel plate fixing hole. Detailed Implementation

[0053] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0054] Example 1

[0055] As one embodiment, as shown in Figures 1 to 12 Figure 13As shown, this cable-stayed bridge tower-beam synchronous system includes: 1. Guide rail tail brace; 2. Lifting guide rail; 3. Lifting platform; 4. Hydraulic control platform; 5. Frame bearing diagonal brace; 6. Frame bearing crossbeam; 7. Buffer device; 8. Sliding device; 9. Formwork platform; 10. Rebar binding platform; 11. Steel formwork; 12. Guide rail hanger; 13. Climbing formwork embedded parts; 14. Main working platform; 15. Frame bearing upright; 16. Hydraulic through-hole jack; 17. Wall attachment device; 18. Concrete tower column; 19. Tower column reinforcement; 20. Tie rod; 21. Fastening bolt; 22. Fixed connection block; 23. Elastic buffer column; and 4. Moving slider. 24. Truss structure; 25. Hydraulic jack; 26. Box girder formwork; 27. Tie rod; 28. Traveling anti-roller; 29. ​​Anchoring system; 30. Thrust mechanism; 31. Lifting mechanism; 32. Bearing platform; 33. Stay cable; 34. Hanging basket longitudinal beam; 35. Truss structure formwork; 36. Box girder outer formwork; 37. Box girder outer formwork vertical support assembly; 38. Box girder outer formwork diagonal support assembly; 39. Box girder bottom formwork; 40. Box girder bottom formwork support assembly; 41. Truss; 42. Force transmission support; 43. Hanging basket crossbeam; 44. Load-bearing beam; 45. Support diagonal rod; 46. First fixed connector; 47. Vertical support; 48. Right angle connection. 49. Plate, 50. Horizontal support, 51. Concrete spray curing system, 52. Water pipe adapter, 53. Water pipe, 54. Sprinkler head, 55. Switch valve, 56. Safety wire rope, 57. Hook, 58. Diagonal brace, 59. Diagonal brace fastener, 60. Fixing bolt, 61. Main tower, 62. Fall arrest platform, 63. I-beam, 64. Guardrail reinforcement, 65. Lifting lug, 66. Sliding block, 67. Slide rail, 68. Temporary Z-bracing, 69. Second fixed connection, 70. Bamboo plywood, 71. Bailey beam, 72. Load-bearing beam, 73. Corbel support, 74. Threaded steel, 75. Front support hanging basket system, 76. First temporary Z-bracing. 6. Steel pipe column 77. Second temporary Z-bracing 78. Automatic control hydraulic climbing formwork system 79. Steel pipe column positioning device 80. Positioning steel plate 81. Vertical positioning threaded groove 82. Thread 83. Steel plate fixing hole 84; Buffer device 7 is set up in the main tower of the cable-stayed bridge during the construction of the automatic control hydraulic climbing formwork; Concrete spraying curing system 51 is set up in the main beam of the cable-stayed bridge during the construction of the hanging basket at the front support; A rapid formwork system with a liftable truss structure 25 is adopted; The adjustable temporary transverse support system of the main tower is equipped with a fall protection platform 62; Steel pipe column positioning device 80 is set up on the temporary Z-bracing 68.

[0056] The buffer device 7 is welded from a fixed connecting block 22, an elastic buffer column 23 and a movable slider 24. The fixed connecting block 22 has a pre-drilled fixing hole and is connected to the main working platform 14 by fastening bolts 21.

[0057] The concrete spray curing system 51 consists of a water pipe adapter 52, a water pipe 53, a nozzle 54, and a switch valve 55. The water pipe 53 is fixed to the load-bearing beam 45 through a reserved pipe opening. Water pipe adapters 52 are installed at both ends of the water pipe, forming a spray ring between the hanging basket longitudinal beam 35 and the hanging basket transverse beam 44. A vertical water pipe 53 is installed on one of the water pipe adapters 52 and connected to the spray ring. The bottom of the water pipe is connected to a water pump with appropriate power. The nozzle 54 sprays water by the switch valve 55 installed on the vertical water pipe 53.

[0058] The rapidly erectable truss structure 25 quick-support system consists of hydraulic jacks 26, truss structure templates 36, box girder templates 27, box girder outer formwork vertical support components 38, box girder outer formwork diagonal support components 39, box girder bottom formwork support components 41, truss 42, and force transmission supports 43. The force transmission supports 43 are welded to the bottom of the truss 42 and fixed to the load-bearing beam 45 with bolts. The horizontal and vertical members of the overall truss structure are connected to the truss structure template 36 with bolts. Four lifting points are set on the load-bearing beam 45, and the overall truss structure template is raised or lowered using hydraulic jacks 26. The box girder outer formwork 37 is equipped with box girder outer formwork vertical support components 38 and box girder outer formwork diagonal support components 39, wherein the box girder outer formwork vertical support components 38 consist of vertical... The vertical support 48, right-angle connecting plate 49, and horizontal support 50 are used to fix the vertical support 48 and the horizontal support 50. The vertical support 48 is connected to the hanging basket longitudinal beam 35 and the box girder outer formwork 37 by bolts. The box girder outer formwork diagonal brace assembly 39 is composed of a support diagonal rod 46 and a first fixed connector 47. The support diagonal rod 46 is connected to the first fixed connector 47 by an adjustable thread. The first fixed connector 47 is fixed to the hanging basket longitudinal beam 35 by fastening bolts 21. The box girder bottom formwork 40 is equipped with a box girder bottom formwork support assembly 41, which is welded from steel profiles and is connected to the hanging basket crossbeam 44 and the box girder bottom formwork 40 by bolts. The box girder template 27 is connected to the template by bolts.

[0059] The adjustable temporary lateral support system for the main tower consists of safety wire ropes 56, hooks 57, diagonal braces 58, diagonal brace fixing components 59, fixing bolts 60, and a fall arrest platform 62. Hooks 57 are pre-embedded on the main tower 61 and connected to the safety wire ropes 56. The fall arrest platform 62 consists of I-beams 63, guardrail reinforcement 64, lifting lugs 65, sliders 66, slide rails 67, temporary Z-braces 68, second fixing connectors 69, and bamboo plywood 70. Guardrail reinforcement is installed on the I-beams 63, and the second fixing connectors 69 are welded to both ends to connect to the main tower 61. The I-beam 63 is connected and fixed to the slide rail 67 by fastening bolts 21. The slide rail 67 is equipped with a slider 66. The slider 66 has a reserved fixing port and is fixed to the temporary Z-bracing 68 by bolts. The temporary Z-bracing 68 is covered with bamboo plywood 70. The fall arrest platform 62 is provided with diagonal bracing 58. The main tower 61 is pre-embedded with diagonal bracing fixing parts 59. The diagonal bracing fixing parts 59 are welded to the I-beam 63. The diagonal bracing 58 is connected to the main tower 61 and the fall arrest platform 62 by fixing bolts 60. The I-beam 63 is welded with lifting lugs 65. The fall arrest platform 62 is hoisted, installed and dismantled as a whole.

[0060] The steel pipe column positioning device 80 consists of a positioning steel plate 81, a vertical positioning threaded groove 82, a thread 83, and a steel plate fixing hole 84. The steel pipe column positioning device 80 is assembled from two identical parts, which are respectively set on the left and right sides of the I-beam 63 of the temporary Z-bracing 68. The positioning steel plate 81 is provided with a steel plate fixing hole 84, and a fastening bolt 21 is provided on the steel plate fixing hole 84 to fix it to the I-beam 63. The vertical positioning threaded groove 82 is welded on the positioning steel plate 81. The beginning and end of the steel pipe column 77 are provided with threads 83 in opposite directions, which are tightened to fix it to the vertical positioning threaded groove 82.

[0061] Example 2

[0062] As another embodiment, such as Figure 14 As shown in the figure, this embodiment presents the construction method of the cable-stayed bridge tower-beam synchronous system in Embodiment 1. The main construction steps are as follows:

[0063] Step 1: Connect the buffer device 7 to the main working platform 14; install the climbing formwork embedded parts 13, wall-attachment device 17, and climbing frame in the initial pouring section; install the lifting guide rail 2 and hydraulic system; hoist the lifting platform 3, formwork platform 9, rebar tying platform 10, and main working platform 14; when installing the wall-attachment device 17, fix the guide rail bracket 12 to the concrete surface with the force bolts and install the wall-attachment bracket; then install the upper and lower reversing boxes and hydraulic cylinders, and install the lifting guide rail 2 and hydraulic system; the climbing frame is set according to the position shown in the layout drawing. First, assemble the lifting platform 3, formwork platform 9, rebar tying platform 10, and main working platform 14 on the assembly platform on the ground, and then use hoisting equipment to lift and install them to the specified position, and use the frame bearing diagonal brace 5 to adjust the angle so that the frame bearing beam 6 is in a horizontal position.

[0064] Step 2: Move the formwork platform 9 and the rebar binding platform 10 backward using the sliding device 8, lift the support, and bind the tower column rebar 19; move the formwork platform 9 and the rebar binding platform 10 forward to pour the concrete tower column 18; continue to install the climbing formwork embedded parts 13, specifically, move the formwork platform 9 and the rebar binding platform 10 backward using the sliding device 8, and use the buffer device 7 to reduce the impact force during the movement; remove the guide rail tail support 1 for the next turnover, lift the support using the hydraulic through-hole jack 16, carry out the tower column rebar 19 binding construction on the rebar binding platform 10, and set the climbing formwork embedded parts 13; lift the lifting guide rail 2 using the hydraulic system; move the formwork platform 9 and the rebar binding platform 10 forward using the sliding device 8, and the buffer device 7 moves forward synchronously using the elastic buffer column 23. The tower column formwork uses steel formwork 11, and the steel formwork 11 is connected by tie rods 20. After the formwork structure is completed, pour the concrete tower column 18 according to the process plan.

[0065] After the concrete is poured, the surface is covered with a film and water is sprinkled for moisture retention and curing. After the concrete structure strength exceeds 15MPa, the demolding process begins. At this time, the steel formwork 11 is moved back 50-60cm and locked with pins.

[0066] Step 3: Assemble the hanging basket. Use the anchoring system 30 to install the front support hanging basket system 75. Assemble the hanging basket on the assembly platform. The hanging basket includes hydraulic jacks 26, traveling anti-roll wheels 29, hanging basket anchoring system 30, thrust mechanism 31, lifting mechanism 32, bearing platform 33, stay cables 34, hanging basket longitudinal beams 35, and hanging basket transverse beams 44. Use the hanging basket anchoring system 30 to lift the main beam of the hanging basket into position. Then, use a tower crane and crawler crane to install the C-shaped hooks. After meeting the safety lifting requirements, complete the front support hanging basket installation. The basket system is installed; the truss structure 25 is hoisted onto the front support basket, and the truss structure template 36 is raised; four load-bearing beams 45 are set at the overall truss support legs of the front support basket, with the two sides being liftable load-bearing beams and the middle being a fixed load-bearing beam; after the truss structure template 36 is raised to the designated position, a pin is inserted between the movable load-bearing beam and the basket crossbeam 44, and the overall truss support leg at the fixed load-bearing beam is fixedly connected to the force transmission support 43; concrete is poured, the stay cables 34 are tensioned, and then water is sprayed for curing using the concrete spray curing system 51.

[0067] Step 4: Lower the truss structure template 36, move the track forward and install the traveling anti-roller 29, and use the hydraulic jack 26 to position the hanging basket; when adjusting the truss structure template 36 to descend, remove the pin between the movable load-bearing beam 45 and the hanging basket crossbeam 44, adjust the height of the truss structure 25 support leg at the fixed load-bearing beam 45, and remove the force transmission support 43; then, use the hydraulic jack 26 to lower the truss structure template 36 to the designated position; finally, insert the pin between the movable load-bearing beam 45 and the hanging basket crossbeam 44 for fixation; after the system conversion and truss structure 25 descent are completed, remove the box girder section template and remove the front and middle anchor bolt groups in the anchoring system 30. The rear anchor bolt group is moved forward and fixed, and mortar and steel plates are laid under the track for leveling. The traveling anti-roller 29 is installed. After completion, the hanging basket can be lowered, and the front outer anchor bolt group and thrust mechanism 31 are removed. The travel end line of the hanging basket of the next segment and the bridge centerline are measured and laid out using a total station to determine the position of the hanging basket in the longitudinal direction of the bridge. The C-shaped hook is pushed by the hydraulic jack 26 to move the hanging basket forward into place. The outer anchor bolt group in the front anchoring system 30 is installed. The front outer anchor bolt group is slowly and synchronously raised. At the same time, the elevation adjustment mechanism screw is lowered and the hanging basket is raised. The thrust mechanism 31 is installed. The thrust jack is operated to position the hanging basket in the plane, thus realizing the forward movement of the hanging basket.

[0068] Step 5: Repeat steps 2 to 4, simultaneously cycling the automatic control hydraulic climbing formwork system 79 and the front support hanging basket system 75 until the height of the main tower 61 and the length of the main beam meet the construction requirements.

[0069] Step 6: Install the adjustable temporary transverse support system for the main tower; install steel pipe columns 77 between the first temporary Z-bracing 76 and the second temporary Z-bracing 78 using the steel pipe column positioning device 80.

[0070] Step 7: Fix the corbel support 73 and assemble the Bailey beam 71. After the bamboo plywood 70 is used as a formwork, pour the upper crossbeam.

[0071] Example 3

[0072] Another embodiment of the construction method for the synchronous construction system of cable-stayed bridge towers and beams proposed in Example 2 is as follows:

[0073] Step 1, Installation of buffer device 7: The buffer device 7 is made by welding a fixed connecting block 22, an elastic buffer column 23 and a movable slider 24. The fixed connecting block 22 has a pre-drilled fixing hole and is connected to the main working platform 14 of the climbing frame by fastening bolts 21.

[0074] Step 2: Installation of the Automatic Control Hydraulic Climbing Formwork System 79: In the initial pouring section, install the climbing formwork embedded parts 13 according to the design position, ensuring their accuracy, and then install the wall-mounted device 17 and set up the climbing frame. When installing the wall-mounted device 17, fix the guide rail bracket 12 to the concrete surface using load-bearing bolts at the tower column embedded part position, install the wall-mounted brackets, and maintain the stability of the structure. Then install the upper and lower reversing boxes and hydraulic cylinders, and install the lifting guide rail 2 and hydraulic system. According to the layout diagram, assemble the lifting platform 3, formwork platform 9, rebar tying platform 10, and main working platform 14 on the ground assembly platform. Then, use hoisting equipment to lift and stably install them to the designated position, and adjust their angle using the frame-bearing diagonal brace 5 to ensure the frame-bearing crossbeam 6 is in a horizontal position.

[0075] Step 3, Main Tower Reinforcement Binding: The formwork platform 9 and reinforcement binding platform 10 are moved backward using the sliding device 8. The buffer device 7 is used to reduce the impact force during the movement. The guide rail tail support 1 is removed for the next turnover. The support is lifted using the hydraulic through-hole jack 16. On the reinforcement binding platform 10, the tower column reinforcement 19 is bound according to the process plan, and the climbing formwork embedded parts 13 are installed.

[0076] Step 4, Formwork and Concrete Pouring: The formwork platform 9 and the rebar tying platform 10 are moved forward by the sliding device 8, and the buffer device 7 moves forward synchronously using the elastic buffer column 23. The tower column formwork uses steel formwork 11, and the formwork is connected by tie rods 20. After the formwork structure is completed, the concrete tower column 18 is poured according to the process plan.

[0077] Step 5, Formwork Removal: After the concrete is poured, the surface is covered with a film and watered for curing. Once the concrete structure strength exceeds 15 MPa, demolding begins. At this time, the steel formwork 11 is moved back 50-60 cm and locked with pins to prevent slippage.

[0078] Step 6, Automatic Control Hydraulic Climbing Formwork System 79 Cycle: Install the climbing formwork pre-embedded parts 13, lift the lifting guide rail 2 through the hydraulic device, repeat steps 3 to 5 until the main tower height reaches the construction requirements.

[0079] Step 7: Installation of the Front Support Hanging Basket System: Assemble all components of the hanging basket on the assembly platform, including: hydraulic jacks 26, traveling anti-roll wheels 29, hanging basket anchoring system 30, thrust mechanism 31, lifting mechanism 32, bearing platform 33, stay cables 34, hanging basket longitudinal beams 35, and hanging basket transverse beams 44. Use the front support hanging basket anchoring system 30 to lift the main beam of the hanging basket into position. Then, use a tower crane and crawler crane to install the C-shaped hooks. After meeting the safety lifting requirements, the installation of the front support hanging basket system is complete.

[0080] Step 8: Installation of the liftable truss structure 25: The bottomless box chamber of the main beam adopts the liftable truss structure 25, which is hoisted to the front support hanging basket by a truck crane. The front support hanging basket is equipped with 4 load-bearing beams 45 at the overall truss support legs, with liftable load-bearing beams 45 on both sides and fixed load-bearing beams 45 in the middle. The liftable truss structure 25 consists of hydraulic jacks 26, truss structure template 36, box girder template 27, box girder outer formwork vertical support assembly 38, box girder outer formwork diagonal support assembly 39, box girder bottom formwork support assembly 41, truss 42, and force transmission support 43. The force transmission support 43 is welded to the bottom of the truss 42 and fixed to the load-bearing beam 45 with bolts. The horizontal and vertical members of the overall truss structure are connected to the truss structure template 36 by bolts. Four lifting points are set on the load-bearing beam 45, each with a precision-rolled threaded steel bar. The hydraulic jacks 26 are used to lift or lower the overall truss structure template. The box girder outer formwork 37 is equipped with box girder outer formwork vertical support assembly 38 and box girder outer formwork diagonal support assembly 39. Form 38 consists of a vertical support 48, a right-angle connecting plate 49, and a horizontal support 50. The vertical support 48 and the horizontal support 50 are fixed together by the right-angle connecting plate 49. The vertical support 48 is connected to the hanging basket longitudinal beam 35 and the box girder outer formwork 37 by bolts. The box girder outer formwork diagonal brace assembly 39 consists of a support diagonal rod 46 and a first fixed connector 47. The support diagonal rod 46 is connected to the first fixed connector 47 by an adjustable thread. The first fixed connector 47 is fixed to the hanging basket longitudinal beam 35 by fastening bolts 21. The box girder bottom formwork 40 is provided with a box girder bottom formwork support assembly 41, which is welded from steel profiles. It is connected to the hanging basket crossbeam 44 and the box girder bottom formwork 40 by bolts. The box girder outer formwork 37 is connected by tie rods 20.

[0081] Step Nine: Lifting the Overall Truss Structure Template: Begin a trial lift by starting the hydraulic pump and gradually increasing the oil pressure. Lift the entire steel truss 42 by 3-5 cm, then stop lifting. Check the height difference of the lifting points of the overall truss structure template 36, ensuring that all lifting points remain at the same height. After the trial lift is successful, begin the formal lift. Once the overall truss structure template 36 is raised to the designated position, insert a pin to fix it between the movable load-bearing beam 45 and the hanging basket crossbeam 44. Install fixed connectors on the overall truss support legs at the fixed load-bearing beam 45 and connect them to the force transmission support 43. Adjust the height of the support legs to ensure a tight fit.

[0082] Step 10: Main Beam Reinforcement Binding: After the main beam truss structure formwork 36, box girder outer formwork 37, and box girder bottom formwork 40 are fully in place, reinforcement binding begins. The installation sequence of the main beam reinforcement is: first the bottom web of the box girder and transverse diaphragms, then the main longitudinal beams at the cable positions, and finally the top slab. During the binding process, the pre-embedded parts and reserved holes of the hanging basket are installed. After binding is completed, the outer formwork and top formwork of the transverse diaphragms are assembled, and finally the end formwork is installed. The end formwork uses steel molds and is perpendicular to the bottom formwork.

[0083] Step 11: Main Beam Concrete Pouring and Stay Cable Tensioning (34-Tension): Before pouring concrete, clean the formwork of debris, accumulated water, and contaminants from the reinforcing bars. Pour concrete symmetrically from both ends towards the centerline laterally, and from the cantilever end towards the cantilever root longitudinally, to avoid uneven settlement and beam cracking. Use an immersion vibrator for compaction during pouring; the vibrator should be inserted quickly and withdrawn slowly. When the concrete reaches 50% completion, perform stay cable tensioning (34-Tension); when the concrete pouring is complete and the concrete strength reaches 90% of the design strength, perform stay cable tensioning (34-Tension) again.

[0084] Step 12, Main Beam Concrete Curing: A concrete spray curing system 51 is used, consisting of a water pipe adapter 52, a water pipe 53, a nozzle 54, and a switch valve 55. The water pipe 53 is fixed to the load-bearing beam 45 through a pre-reserved pipe opening. Water pipe adapters 52 are installed at both ends of the water pipe, forming a spray ring between the hanging basket longitudinal beam 35 and the hanging basket transverse beam 44. A vertical water pipe 53 is installed on one of the water pipe adapters 52 and connected to the spray ring. The bottom of this water pipe is connected to a water pump of suitable power. The switch valve 55 installed on the vertical water pipe 53 controls the nozzle 54 to spray water, enabling the main beam concrete to be cured while the front support hanging basket system is being constructed.

[0085] Step 13, Formwork System Conversion: After the concrete reaches the design strength, tension the transverse and longitudinal prestresses. After tensioning, the system is converted by transferring the stay cables 34 anchored at the front end of the formwork to the beam end, allowing the formwork to be directly supported by the front outer anchor group on the poured main beam, and then tensioned to the design cable force by the tower end jacks.

[0086] Step Fourteen: Lowering the Overall Truss Structure Formwork: Similar to raising the overall truss structure formwork, after confirming that everything is correct and the trial descent is normal, begin the formal descent. First, remove the pin between the movable load-bearing beam 45 and the hanging basket crossbeam 44, adjust the height of the overall truss structure support leg at the fixed load-bearing beam 45, and remove the force transmission support 43; then, use the hydraulic jack 26 until the overall truss structure formwork 36 is lowered to the designated position; finally, insert the pin between the movable load-bearing beam 45 and the hanging basket crossbeam 44 for fixation.

[0087] Step 15: Lowering and Moving the Hanging Basket Forward: After the system conversion and descent of the overall truss structure 25, remove the box girder formwork, remove the front and rear anchor bolt groups in the anchoring system 30, move the track forward and fix it, and lay mortar and steel plates under the track for leveling. Install the traveling anti-roll wheels 29. After completion, the hanging basket can be lowered, and the front outer anchor bolt group and thrust mechanism 31 can be removed. Use a total station to measure and mark the hanging basket travel termination line and bridge centerline of the next segment to determine the position of the hanging basket in the longitudinal direction of the bridge. Use hydraulic jacks 26 to push the C-shaped hooks to move the hanging basket forward into place, install the outer anchor bolt group in the front anchoring system 30, slowly and synchronously raise the front outer anchor bolt group, and at the same time, lower the elevation adjustment mechanism screw, raise the hanging basket, install the thrust mechanism 31, and operate the thrust jacks to position the hanging basket in the plane.

[0088] Step 16, Front Support Hanging Basket System Cycle: Repeat steps 9 to 15 until the main beam length meets the construction requirements.

[0089] Step 17: Installation of the Adjustable Temporary Lateral Support System for the Main Tower: The adjustable temporary lateral support system for the main tower consists of safety wire rope 56, hooks 57, diagonal braces 58, diagonal brace fixing parts 59, fixing bolts 60, and a fall arrest platform 62. Hooks 57 are pre-embedded on the main tower 61 and connected to the safety wire rope 56. The fall arrest platform 62 consists of I-beams 63, guardrail reinforcement 64, lifting lugs 65, sliders 66, slide rails 67, temporary Z-braces 68, second fixing connectors 69, and bamboo plywood 70. Guardrail reinforcement is installed on the I-beams 63, and second fixing connectors 69 are welded to both ends. 9 is connected to the main tower 61. The I-beam 63 is connected and fixed to the slide rail 67 by fastening bolts 21. The slide rail 67 is equipped with a slider 66. The slider 66 has a reserved fixing port and is fixed to the temporary Z-bracing 68 by bolts. The temporary Z-bracing 68 is covered with bamboo plywood 70. The fall arrest platform 62 is equipped with diagonal bracing 58. The main tower 61 has pre-embedded diagonal bracing fixing parts 59. The diagonal bracing fixing parts 59 are welded to the I-beam 63. The diagonal bracing 58 is connected to the main tower 61 and the fall arrest platform 62 by fixing bolts 60. The I-beam 63 is welded with lifting lugs 65. The fall arrest platform 62 is hoisted, installed and dismantled as a whole.

[0090] Step 18: Temporary Steel Pipe Column Support Installation: Before the construction of the upper crossbeam, steel pipe columns 77 are installed between the first and second temporary Z-supports to reduce the span. Steel pipe column positioning devices 80 are installed on both temporary supports, consisting of a positioning steel plate 81, a vertical positioning threaded groove 82, threads 83, and steel plate fixing holes 84. The steel pipe column positioning device 80 is composed of two identical parts spliced ​​together, respectively installed on the left and right sides of the I-beam 63 of the temporary Z-brace 68. The positioning steel plate 81 has steel plate fixing holes 84, and fastening bolts 21 are installed on the steel plate fixing holes 84 to fix it to the I-beam 63. The vertical positioning threaded groove 82 is welded onto the positioning steel plate 81. The beginning and end of the steel pipe column 77 are provided with threads 83 in opposite directions, which are tightened to fix it to the vertical positioning threaded groove 82.

[0091] Step 19, Upper Crossbeam Construction: The upper crossbeam adopts a structure of corbel support 73 + load-bearing beam 72 + Bailey beam 71 + square timber + bamboo plywood 70. During bridge tower construction, pre-drilled holes for threaded steel bars 74 are reserved. The corbel support 73 is processed in the factory according to the design dimensions and welded as a whole on the ground. It is then hoisted as a whole using a tower crane, and the threaded steel bars 74 are installed for fixation. The Bailey panels are assembled in three sections on the ground, using a single-machine hoisting method to lift them to the upper crossbeam position. They are then assembled section by section on the corbel support 73, first installing the middle set of Bailey panels, and then installing the Bailey panels on both sides. After the bottom formwork of the upper crossbeam is laid, the reinforcing bars are tied according to the construction requirements. The inner and outer formwork adopts a template system of bamboo plywood 70 + square timber vertical ribs + double-splitting channel steel horizontal ribs, connected by tie rods 20. The inner top formwork adopts a template system of bamboo plywood 70 + square timber + steel pipe support. After the formwork is erected, concrete curing and formwork removal are carried out.

Claims

1. A cable-stayed bridge tower-beam synchronization system, characterized in that, Comprise: Buffer device (7), concrete spray maintenance system (51), liftable truss structure fast formwork system, main tower adjustable temporary lateral support system, automatic control hydraulic climbing formwork system (79) and steel pipe column positioning device (80); The buffer device (7) comprises a fixed connecting block (22), an elastic buffer column (23) and a movable sliding block (24), the concrete tower column (18) is connected with a lifting guide rail (2), and the lifting guide rail (2) is fixed with a main working platform (14); the fixed connecting block (22) is connected with the main working platform (14); the main working platform (14) is fixed on the top of the hanging platform (3), the main working platform (14) is fixed on the top of the formwork platform (9), and the formwork platform (9) is fixed on the top of the steel bar binding platform (10); The sliding device (8) comprises the buffer device (7); the fixed connecting block (22) and the movable sliding block (24) are connected through the elastic buffer column (23), the fixed connecting block (22) is fixed on the top of the main working platform (14) through the fastening bolt (21), and the formwork platform (9) is fixed on the sliding device (8); The concrete spray maintenance system (51) comprises a water pipe (53); the water pipe (53) is fixed on the bearing beam (45), and a water spraying ring is formed between the hanging basket longitudinal beam (35) and the hanging basket cross beam (44); The liftable truss structure fast formwork system comprises a truss structure formwork (36); a bearing beam (45) is arranged between adjacent hanging basket cross beams (44); a hydraulic jack (26) is arranged between the truss structure formwork (36) and the bearing beam (45); the box girder outer form (37) is provided with a box girder outer form vertical support assembly (38) and a box girder outer form inclined support assembly (39); the box girder bottom form (40) is provided with a box girder bottom form support assembly (41); and the box girder outer form (37) is fixed at the end of the box girder bottom form (40); The main tower adjustable temporary lateral support system comprises an anti-falling platform (62); the anti-falling platform (62) is connected with the main tower (61) through welding of the second fixed connecting piece (69) at both ends; The main tower (61) is fixed with a second temporary Z cross brace (78) and a first temporary Z cross brace (76); Adjacent second temporary Z cross braces (78) are provided with steel pipe column positioning devices (80), and adjacent first temporary Z cross braces (76) are provided with steel pipe column positioning devices (80); the steel pipe column positioning device (80) comprises a positioning steel plate (81); two positioning steel plates (81) are spliced from left and right sides of an I-shaped steel (63); a vertical positioning threaded groove (82) is welded on the positioning steel plate (81); and the steel pipe column (77) is fixed at both ends through threads (83) and the vertical positioning threaded groove (82). The adjustable temporary lateral support system of the main tower further comprises a safety steel wire rope (56), an inclined strut (58), an inclined strut fixing member (59), and a fixing bolt (60); the safety steel wire rope (56) is arranged between the main towers (61) through the pre-buried hooks (57); the anti-falling platform (62) comprises an I-beam (63), a guardrail steel bar (64), a lifting lug (65), a sliding block (66), a sliding rail (67), a temporary Z-shaped lateral strut (68), a second fixing connecting member (69), and a bamboo-mesh board (70), wherein the I-beam (63) is provided with the guardrail steel bar, the two ends of the I-beam (63) are connected with the main towers (61) through the second fixing connecting members (69), the I-beam (63) is connected and fixed with the sliding rail (67) through the fixing bolt (21), the sliding rail (67) is provided with the sliding block (66), the sliding block (66) is fixed with the temporary Z-shaped lateral strut (68) through the bolt, and the bamboo-mesh board (70) is arranged on the temporary Z-shaped lateral strut (68); the anti-falling platform (62) is provided with the inclined strut (58) below, the main towers (61) are provided with the inclined strut fixing members (59), the I-beam (63) is welded with the inclined strut fixing members (59), and the inclined strut (58) is connected with the inclined strut fixing members (59) on the main towers (61) and the anti-falling platform (62) through the fixing bolt (60); the I-beam (63) is welded with the lifting lug (65).

2. The cable-stayed bridge tower-beam synchronization system according to claim 1, characterized in that: The buffer device (7) is welded and processed by a fixed connecting block (22), an elastic buffer column (23), and a moving sliding block (24), the fixed connecting block (22) is provided with a fixed hole, and the fixed connecting block (22) is connected with the main working platform (14) through the fixing bolt (21).

3. The synchronous cable-stayed tower-beam system of claim 1, wherein: The concrete spraying maintenance system (51) further comprises a water pipe adapter (52), a spray head (54), and an on-off valve (55); the water pipe (53) is fixed on the load-bearing beam (45) through a reserved pipeline opening, both ends of the water pipe (53) are provided with the water pipe adapter (52), and a plurality of water pipes (53) form a water spraying ring between the hanging basket longitudinal beam (35) and the hanging basket cross beam (44); one water pipe (53) is further arranged on one of the water pipe adapters (52) and connected with the water spraying ring, and the bottom of the water pipe (53) is connected with a water pump; the water pipe (53) is provided with the on-off valve (55).

4. The cable-stayed bridge tower-beam synchronization system according to claim 1, characterized in that: The lifting truss structure rapid formwork system further comprises a force transmission support (43); the force transmission support (43) is welded at the bottom of the truss (42) and is fixed on the bearing beam (45) through bolts; the integral truss structure horizontal and vertical rods are connected with the truss structure formwork (36) through bolts; four lifting points are arranged on the bearing beam (45), and each lifting point is used for lifting or lowering the truss structure formwork (36) through a hydraulic jack (26); the box girder outer form (37) is provided with a box girder outer form vertical support assembly (38) and a box girder outer form inclined support assembly (39), wherein the box girder outer form inclined support assembly (39) comprises a vertical support (48), a right-angle connecting plate (49) and a horizontal support (50), the vertical support (48) and the horizontal support (50) are fixed through the right-angle connecting plate (49), and the vertical support (48) is connected with the hanging basket longitudinal beam (35) and the box girder outer form (37) through bolts; the box girder outer form vertical support assembly (38) comprises a support inclined rod (46) and a first fixed connecting piece (47), the support inclined rod (46) is connected with the first fixed connecting piece (47) through an adjustable thread, and the first fixed connecting piece (47) is fixed with the hanging basket longitudinal beam (35) through a fastening bolt (21); the box girder bottom form (40) is provided with a box girder bottom form support assembly (41), and the box girder bottom form support assembly (41) is connected with the hanging basket cross beam (44) and the box girder bottom form (40) through bolts.

5. The synchronous cable-stayed tower-beam system of claim 1, wherein: The steel pipe column positioning device (80) further comprises a steel plate fixing hole (84); the steel pipe column positioning device (80) is spliced from two same parts, and the two positioning steel plates (81) are arranged on the left and right sides of the temporary Z cross brace (68); the positioning steel plate (81) is provided with a steel plate fixing hole (84), and the steel plate fixing hole (84) is fixedly connected with the I-shaped steel (63) through a fastening bolt (21); a vertical positioning threaded groove (82) is welded on the positioning steel plate (81); the initial end and the terminal end of the steel pipe column (77) are provided with threads (83) in opposite directions, and the steel pipe column (77) is fixed through the threads (83) and the vertical positioning threaded groove (82).

6. The method of claim 1 to 5, wherein the method is characterized by, The method comprises the following steps: Step one, the buffer device (7) is connected with the main working platform (14); the climbing formwork pre-embedded part (13), the attached wall device (17) and the climbing frame are installed in the initial pouring section; the lifting guide rail (2) and the hydraulic system are installed; the lifting platform (3), the formwork platform (9), the steel bar binding platform (10) and the main working platform (14) are hoisted; Step two, the formwork platform (9) and the steel bar binding platform (10) are moved backward through the sliding device (8), the support is lifted, and the tower column steel bar (19) is bound; the formwork platform (9) and the steel bar binding platform (10) are moved forward to pour the concrete tower column (18); the climbing formwork pre-embedded part (13) is continuously installed, and the lifting guide rail (2) is lifted through the hydraulic system; Step three, assemble the hanging basket, and complete the installation of the front fulcrum hanging basket system (75) by using the anchoring system (30); hoist the truss structure (25) to the front fulcrum hanging basket, and raise the truss structure formwork (36); pour concrete, tension the stay cables (34) at the bottom of the truss structure (25), and then use the concrete spraying maintenance system (51) to spray water for maintenance; Step four, lower the truss structure formwork (36), move the track forward and install the walking counter-roller (29), and use the hydraulic jack (26) to position the hanging basket; Step five, repeat steps two to four, and simultaneously perform the cycle of the automatic control hydraulic climbing formwork system (79) and the front fulcrum hanging basket system (75) until the height of the main tower (61) and the length of the main beam reach the construction requirements; Step six, install the adjustable temporary transverse support system of the main tower; set the steel pipe column (77) between the first temporary Z transverse support (76) and the second temporary Z transverse support (78) through the steel pipe column positioning device (80); Step seven, fix the bracket support (73) and assemble the Bailey beam (71), and complete the post-pouring of the upper beam using the bamboo plywood (70) formwork.

7. The method of constructing a cable-stayed bridge tower-beam synchronization system according to claim 6, characterized in that, In step one, when installing the attached wall device (17), fix the guide rail hanging seat (12) on the concrete surface through the force bolt, install the attached wall hanging piece, then install the upper and lower reversing boxes and the hydraulic cylinder, and install the lifting guide rail (2) and the hydraulic system; set the climbing frame according to the display position of the layout, first assemble the hoisting platform (3), the formwork platform (9), the steel bar binding platform (10), and the main working platform (14) on the ground assembly platform, then hoist and install to the specified position using hoisting equipment, and adjust the angle using the frame body pressure inclined strut (5) to make the frame body pressure beam (6) horizontal.

8. The method of constructing a cable-stayed bridge tower-beam synchronization system according to claim 6, characterized in that, In step two, move the formwork platform (9) and the steel bar binding platform (10) backward through the sliding device (8), reduce the impact force during the movement using the buffer device (7), remove the guide rail tail support (1) for the next time, lift the support through the hydraulic through-jack (16), and perform the tower column steel bar (19) binding construction on the steel bar binding platform (10), and set the climbing formwork embedded part (13); Move the formwork platform (9) and the steel bar binding platform (10) forward through the sliding device (8), and move the buffer device (7) forward synchronously using the elastic buffer column (23); the tower column formwork uses the steel formwork (11), which is connected through the tensioning screw rod (20) between the steel formworks (11); after the formwork structure is completed, pour the concrete tower column (18) according to the process scheme; After the concrete pouring is completed, spray water on the surface for moisture maintenance; after the concrete structure strength exceeds 15MPa, start the demolding treatment; at this time, move the steel formwork (11) backward by 50-60cm, and lock it using the latch.

9. The method of constructing a cable-stayed tower-beam synchronization system according to claim 6, characterized in that: The hanging basket is assembled on the assembling platform, and the hanging basket comprises hydraulic jacks (26), walking counter-rollers (29), a hanging basket anchoring system (30), a thrust mechanism (31), a jacking mechanism (32), a bearing platform (33), stay cables (34), hanging basket longitudinal beams (35) and hanging basket cross beams (44); the hanging basket main beam is pulled to the position by the hanging basket anchoring system (30), then the C-shaped hooks are installed by the cooperation of the tower crane and the crawler crane, after the safety lifting requirements are met, the front support point hanging basket system installation is completed; The four bearing beams (45) are arranged at the integral truss support legs of the front support point hanging basket, the two sides are liftable bearing beams, and the middle is a fixed bearing beam; after the truss structure formwork (36) is lifted to the specified position, the pin shaft is inserted between the movable bearing beam and the hanging basket cross beam (44), and the fixed bearing beam is fixedly connected with the force transmission support (43); When the truss structure formwork (36) is lowered, the pin shaft between the movable bearing beam (45) and the hanging basket cross beam (44) is taken out, the height of the truss structure (25) support leg at the fixed bearing beam (45) is adjusted, and the force transmission support (43) is taken out; then, the truss structure formwork (36) is lowered to the specified position by the hydraulic jacks (26); finally, the pin shaft is inserted between the movable bearing beam (45) and the hanging basket cross beam (44) for fixation; After the system conversion and the lowering of the truss structure (25) are realized, the box girder part formwork is removed, the front and middle anchor rod groups and the rear anchor rod group in the anchoring system (30) are removed, the track is moved forward for fixation, and the mortar and the steel plate are laid under the track for leveling, and the walking counter-rollers (29) are installed; after the completion, the hanging basket can be lowered, and the front and outside anchor rod groups and the thrust mechanism (31) are removed; the hanging basket walking termination line and the bridge central axis of the next segment are measured and placed by using the total station instrument, so that the position of the hanging basket in the longitudinal bridge direction is determined; the C-shaped hook is pushed by the hydraulic jacks (26), the hanging basket is moved forward to the position, the outside anchor rod group in the front anchoring system (30) is installed, the front and outside anchor rod groups are slowly and synchronously lifted, the screw rod of the elevation adjusting mechanism is lowered, the hanging basket is lifted, the thrust mechanism (31) is installed, the thrust jacks are operated, the plane of the hanging basket is positioned, and the forward movement of the hanging basket is realized.

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