Creeping formwork construction method for sea-crossing cable tower bridge main tower

Abstract

The invention relates to a creeping formwork construction method for a sea-crossing cable tower bridge main tower, and belongs to the technical field of creeping formwork construction.The creeping formwork construction method comprises the steps that firstly, when a first layer of steel bars of the main tower are bound, needed embedded parts are embedded, first layer of concrete of the main tower is poured, and after the strength of the concrete of the main tower reaches the standard, formwork removal is conducted, and wall attaching devices are installed at the embedded parts of the first layer of the main tower; secondly, a truss is assembled, the assembled truss is hoisted and hung on a wall attaching device which is buried when a first layer of the main tower is poured, embedded parts are positioned and installed on formworks, the formworks are assembled, a second layer of concrete of the main tower is poured, and a third layer of steel bars is bound; thirdly, after the concrete strength of the main tower reaches the standard, the formwork is removed, the formwork is moved backwards, a wall attaching device and a hoisting guide rail are installed at the embedded part, a hydraulic system is established, and a synchronous climbing monitoring system is arranged on the hydraulic system; fourthly, the hydraulic system climbs, and meanwhile it is guaranteed that the truss and the formwork are synchronously lifted through a hydraulic synchronous climbing monitoring system; the positioning accuracy is high.

Description

Technical Field

[0001] The invention belongs to the technical field of climbing formwork construction, and in particular relates to a climbing formwork construction method for a main tower of a cross-sea cable tower bridge. Background Art

[0002] Hydraulic climbing formwork construction technology is a construction technology that uses hydraulic cylinders and hydraulic control systems to drive the formwork to climb up along the outer wall of a building. The basic principle is to install a hydraulic cylinder at the bottom of the formwork and use the cylinder to drive the formwork to move upward along the guide rail, thereby achieving the climbing of the formwork. During the climbing process, the extension and retraction speed and stroke of the cylinder are controlled by the hydraulic control system.

[0003] In the construction of high pier climbing formwork in cross-sea bridges, control accuracy is very important. If the control accuracy is not enough, it will lead to an ugly appearance of the pier body or affect the safety of the structural force. To improve the control accuracy, it is necessary to first improve the accuracy of the template positioning. In the prior art, after the climbing template is initially in place, it is necessary to adopt a manual adjustment method to accurately adjust and position it, but the whole set of templates is heavy, so it takes a lot of manpower and a long time to accurately control the template height to achieve the purpose of accurate positioning. For this reason, Chinese patent CN117364645A discloses a method for thin-walled The template intelligent sliding system for hollow high pier construction includes a high pier, and two support rods are symmetrically installed above the high pier; a jack stroke monitoring component is installed on each support rod; the jack stroke monitoring component includes a jack, an infrared rangefinder, and an F-type lifting frame matched with the jack; the jack is sleeved on the support rod and fixedly connected to the F-type lifting frame located on one side of the support rod; a sliding form operating platform is fixed on the F-type lifting frame, and an inclination monitor is installed around the sliding form operating platform; the inclination monitor detects the offset direction, offset angle, and offset of the operating platform. The data is monitored in real time and uploaded to the PLC automatic sliding formwork monitor through a wireless transmitter; the PLC automatic sliding formwork monitor is connected to the jack through an oil circuit; the jack drives the template to move in place by measuring the position of the template through an infrared rangefinder, and calculates whether the template is moved to the right position by calculating its position relative to the infrared rangefinder, which overcomes the disadvantage of the difficulty of correcting the deviation of the traditional frame and effectively solves the problem of high pier sliding formwork construction; however, in the above structure, when there are several jacks, several infrared rangefinders are required, and the several infrared rangefinders need to measure the distance between themselves and the measuring point respectively, upload them to the calculation module, and then the calculation module calculates the difference of several distance data, and then judges the distance between several points and the infrared rangefinder, and then judges the levelness and consistency of the climb. However, this scheme has many calculation steps, and there is a probability of causing errors in each data measurement, conversion and calculation process. The probability of generating errors in multiple data measurement, conversion and calculation processes is relatively high, and then there is a high probability of inaccurate positioning. For this reason, a hydraulic sliding formwork construction technology for the main tower of a cross-sea super-large cable tower bridge with high positioning accuracy is required. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a climbing formwork construction method for a main tower of a cross-sea cable tower bridge, which has the characteristic of high positioning accuracy.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The hydraulic sliding formwork construction technology for the main tower of the sea-crossing extra-large cable tower bridge includes the following steps:

[0007] Step 1: When tying the first layer of steel bars of the main tower, the required embedded parts are embedded at the same time, and the first layer of concrete of the main tower is poured. After the concrete strength of the main tower reaches the standard, the formwork is removed and the wall attachment device is installed at the embedded parts of the first layer of the main tower;

[0008] Step 2: Assemble the trusses, lift the assembled trusses, hang them on the wall-mounted device on the first floor of the main tower, locate and install the embedded parts on the template, close the mold, pour the second floor of concrete of the main tower, and tie the third floor of steel bars;

[0009] Step 3: After the main tower concrete strength reaches the standard, the formwork is removed, the formwork is moved back, the wall attachment device is installed at the embedded parts, the guide rail is hoisted, and the hydraulic system and synchronous climbing monitoring system are established;

[0010] Step 4: The hydraulic system climbs, and the hydraulic synchronous climbing monitoring system is used to ensure that the truss and the template are climbing synchronously. After climbing into place, the hanging platform is installed at the bottom of the truss;

[0011] Step 5: Before closing the mold, position and install the embedded parts on the template, close the mold, and after the mold is closed, start pouring the third layer of concrete of the main tower and tie the fourth layer of steel bars;

[0012] Step 6: After pouring is completed and the main tower concrete strength reaches the standard, remove the formwork, move the formwork back and install the wall attachment device on the embedded parts;

[0013] Step 7: Repeat steps 4 to 6 until the construction is completed.

[0014] As a preferred technical solution of the present invention, step three also includes: installing a hydraulic climbing jack and a steering box on the truss, using an oil pipe to connect the hydraulic pump station and the hydraulic climbing jack, and electrically connecting the hydraulic pump station, the hydraulic climbing jack and the control module to form a complete hydraulic system; installing a rope positioner, a rope rod, an infrared horizontal receiver and an infrared horizontal transmitter on the hydraulic climbing jack to form a hydraulic synchronous climbing monitoring system.

[0015] As a preferred technical solution of the present invention, the step three also includes: after the hydraulic system is formed, performing a system test to check the start, stop and speed regulation functions of the hydraulic pump station.

[0016] As a preferred technical solution of the present invention, step four also includes: in the initial stage of hydraulic climbing, each hydraulic climbing jack is positioned on the same horizontal plane, and it is ensured that there are no obstructions between adjacent hydraulic climbing jacks; then the infrared horizontal transmitting instrument and the infrared horizontal receiving instrument are turned on, so that the central transmitting point of the infrared horizontal transmitting instrument is facing the center of the receiving slot of the infrared horizontal receiving instrument; after the climbing formwork reaches the specified position, the hydraulic pump station is instructing the control module to adjust the hydraulic climbing jack, and finally the hydraulic system is turned off after the central transmitting point of the infrared horizontal transmitting instrument is facing the center of the receiving slot of the infrared horizontal receiving instrument.

[0017] As a preferred technical solution of the present invention, the step three also includes: setting a receiving slot with a 20mm scale on the infrared level receiver.

[0018] As a preferred technical solution of the present invention, the step 2 further includes: when assembling the trusses, a template adjustment device is provided so that the template can be moved closer to or away from the main tower in a direction perpendicular to the guide rail.

[0019] The beneficial effects of the present invention are:

[0020] (1) By setting up a hydraulic synchronous climbing monitoring system, ensure that the truss and formwork are climbing synchronously

[0021] (2) By simultaneously installing mutually aligned infrared level transmitters and infrared level receivers on a plurality of hydraulic climbing jacks, the plurality of hydraulic climbing jacks can be calibrated and positioned with each other, thereby reducing the steps of data measurement, conversion and calculation and improving positioning accuracy;

[0022] (3) By setting up the adjustment device, the operator can further adjust the template position during the operation, thereby improving the accuracy of template positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of step 2 of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure during climbing in step 4 of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the mold closing before pouring the third floor of the main tower in step five of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure after the third layer of the main tower is poured in step 5 of the present invention;

[0028] Figure 5This is a schematic diagram of the climbing process when the upper layer of the main tower is repeatedly cast in step seven of the present invention;

[0029] Figure 6 This is a schematic diagram of the completion of the construction when the upper layer of the main tower is repeatedly poured in step seven of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the truss and template of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the lower section of the truss of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the upper section of the truss of the present invention;

[0033] Fig.10 It is a schematic diagram of the hydraulic climbing jack of the present invention in two directions.

[0034] Description of main component symbols:

[0035] In the figure: 1. main tower; 2. truss; 21. upper section of truss; 22. lower section of truss; 3. formwork; 4. hydraulic system; 41. infrared level receiver; 42. infrared level transmitter; 5. wall-mounted structure; 6. embedded parts; 7. guide rail. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0037] See also Figure 1-10 A climbing formwork construction method for a main tower of a cross-sea cable tower bridge comprises the following steps:

[0038] Step 1: When tying the first layer of steel bars of the main tower 1, the embedded parts 6 required for the climbing formwork and climbing frame are embedded at the same time, and the concrete of the main tower 1 is poured. After the concrete strength of the main tower 1 reaches the standard, the formwork is removed and the wall attachment device is installed at the embedded parts 6;

[0039] Specifically, during the construction of the main tower 1, the main tower 1 is in the shape of a regular quadrangular prism, and the quadrangular prism main tower 1 is cast in layers. When casting the first layer of the main tower 1, firstly, the first layer of steel bars of the main tower 1 is tied, and at the same time, the embedded parts 6 are placed at the corresponding steel cage positions at the target positions, ensuring that after the first layer of the main tower 1 is cast, the embedded parts 6 are in the target positions, and then the first layer of the main tower 1 is cast, and the steel bars of the second layer of the main tower 1 are tied on the upper surface of the first layer of the main tower 1;

[0040] The embedded part 6 includes two sections, one of which is located inside the cast main tower 1, and the other extends out of the cast main tower 1. The operator then hangs the wall-attaching device on the embedded part 6 so that the wall-attaching device is set against the first section of the main tower 1. At this time, the part of the embedded part 6 extending out of the main tower 1 and the wall-attaching device form a protruding structure extending out of the main tower 1, which can be used as a hook.

[0041] After step 1 is completed, step 2: assemble the truss 2, lift the assembled truss 2, and hang it on the wall attachment device buried during the first pouring;

[0042] After splicing the trusses 2, the trusses 2 are hung on the wall attachment device of the first floor of the main tower 1. In this embodiment, there are four trusses 2, corresponding to the four sides of the regular quadrangular prism-shaped main tower 1. Each truss 2 includes at least a lower section and an upper section. The lower section truss 2 is in a square shape as a whole. In step 2, the lower section truss 2 is used to be hung on the wall attachment device of the first floor of the main tower 1, so that the lower section of the square truss 2 is close to the outer wall of the first section of the main tower 1.

[0043] Specifically, the direction parallel to the ground and parallel to the wall against which the cube is attached is taken as the reference direction, and the dimension of the cube truss 2 along the reference direction is less than or equal to the side length of the cross section of the main tower 1. At this time, the lower sections of the four trusses 2 can be hung on the four wall attachment devices on the four walls of the first floor of the main tower 1, and they do not interfere with each other after being hung; subsequently, a rearward moving device is arranged on the top surface of the lower section of each truss 2, and the rearward moving device of each truss 2 is a slide rail structure perpendicular to the corresponding side of the main tower 1;

[0044] When splicing the lower section of truss 2, specifically, first prepare two wooden boards and place them on the horizontal ground according to the middle-to-middle spacing of the climbing cone, and ensure that the central axes of the two wooden boards are parallel to each other, then place the tripod buckle on the axis of the wooden board, install the rearward platform beam and the rearward moving device, ensure that the middle-to-middle spacing of the tripod is equal to the middle-to-middle spacing of the first section of the climbing cone, and finally install the platform uprights;

[0045] Then install the platform board on the assembled tripod and ensure it is flat and firm. Check again whether the center-to-center distance between the two tripods is the center-to-center position of the first pouring climbing cone to complete the assembly of the lower section.

[0046] Lift the lower section of the assembled truss 2 as a whole and hang it stably on the wall attachment device buried when pouring the first section of the main tower 1.

[0047] Then assemble the upper section of the truss 2 on the ground. Specifically, place three wooden beams under the formwork 3, then install the truss 2, diagonal braces, and platform uprights on the formwork 3, then install the back rib fasteners, and use steel pipe fasteners to firmly connect the platform uprights and the diagonal steel pipes. Finally, install the platform board;

[0048] After the upper section is assembled, the upper section of the truss 2 is hoisted and placed on the rearward moving device on the top surface of the lower section of the truss 2. At this time, the rearward moving device drives the entire upper section of the truss 2 to approach or move away from the main tower 1; at the same time, the upper section of the truss 2 is connected to the template 3, and the setting position of the template 3 makes the template 3 parallel to the axis of the main tower 1 after the upper section of the truss 2 is placed on the rearward moving device, and the rearward moving device can drive the template 3 to move to a position that coincides with the corresponding position on the side of the main tower 1. The size of the template 3 in the axial direction of the main tower 1 is equal to each casting layer of the main tower 1, and the setting position of the truss 2 ensures that the lower edge of the template 3 is aligned with the upper surface of the first layer of the main tower 1;

[0049] At this time, the upper section of the truss 2 is installed on the rearward moving device, the climbing cone is installed on the lower part of the tripod, and the rearward moving platform crossbeam, platform uprights, rearward moving device and platform plate are installed on the upper part of the tripod;

[0050] In step 2, when the rearward moving devices of the four trusses 2 drive the four templates 3 to move to the position that coincides with the corresponding position of the side of the main tower 1, the space enclosed by the four templates 3 constitutes the structure of the second floor of the main tower 1, and the mold is closed. Subsequently, the second section of the main tower 1 is poured, and the steel bars of the third floor of the main tower 1 are tied to the second section of the main tower 1;

[0051] To ensure that the second floor of the main tower 1 is also provided with embedded parts 6, in step 2, embedded parts 6 are installed on the surface of the template 3 close to the main tower 1. When the second floor of the main tower 1 is poured, the part of the embedded parts 6 close to the space in the mold is integrally connected with the second floor of the main tower 1, so that the second floor of the main tower 1 is also provided with embedded parts 6.

[0052] After step 2 is completed, step 3 is executed: after the concrete strength of the main tower 1 reaches the standard, the formwork is removed, the formwork 3 is moved back, the wall attachment device is installed at the embedded part 6, the guide rail 7 is hoisted, and the hydraulic system 4 and the synchronous climbing monitoring system are established;

[0053] Specifically, four sets of guide rails 7 are fixed to the side surface of the second layer of the main tower 1, and each set of guide rails 7 corresponds to one truss 2. A guide rail 7 perpendicular to the ground and parallel to the axial direction of the main tower 1 is formed on the side of the main tower 1. Then, the lower section of the truss 2 is slidably connected to the guide rail 7. At this time, the guide rail 7 limits the corresponding truss 2, so that the truss 2 can only slide along the axial direction of the main beam.

[0054] At the same time, the hydraulic system 4 includes a hydraulic pump station, a plurality of hydraulic climbing jacks, a control system and a steering box. The control system is used to control the pressure of the hydraulic oil of the hydraulic pump station, thereby realizing the motion control of the hydraulic climbing jack. When in use, the hydraulic climbing jack is set in one-to-one correspondence with the plurality of guide rails 7. One end of the hydraulic climbing jack is connected to the slide rail, and the other end is connected to the upper section of the truss 2. The control system and the hydraulic pump station are placed on the platform plate under the tripod. The hydraulic climbing jack and the steering box are installed on the truss 2, and the hydraulic synchronous lifting monitoring device is installed on the left and right sides of the hydraulic climbing jack.

[0055] At the same time, the synchronous climbing monitoring system includes a plurality of infrared level receivers 41 and infrared level transmitters, and also includes a rope position finder and a rope rod. Each hydraulic climbing jack is provided with an infrared level transmitter and an infrared level receiver 41, and also provided with a rope position finder and a rope rod. The transmitting direction of the infrared level transmitter is perpendicular to the axial direction of the hydraulic climbing jack, and the receiving port of the infrared level receiver 41 is perpendicular to the axial direction of the hydraulic climbing jack. Each hydraulic climbing jack is in the shape of a quadrangular prism, and one of the faces of the quadrangular prism-shaped hydraulic climbing jack is parallel to the side of the adjacent main tower 1. At this time, the two faces of the hydraulic climbing jack are perpendicular to the side of the adjacent main tower 1. The two faces are set as installation faces, and the infrared level transmitter and the infrared level receiver 41 are respectively arranged on the two installation faces.

[0056] After the hydraulic system 4 and the synchronous climbing monitoring system are set up, execute step 4.

[0057] Step 4: Start climbing. The control system uses the hydraulic pump station to push the upper section of the truss 2 with the hydraulic climbing jacks. The upper section of the truss 2 drives the lower section of the truss 2 to move upward to complete the climbing. At the same time, the slide rail limits the lower section of the truss 2, so that the lower section of the truss 2 moves along the slide rail, reducing the probability of the truss 2 and the template 3 tilting due to the asynchronous movement of the hydraulic climbing jacks.

[0058] At the same time, in the initial stage when the hydraulic climbing jacks push the truss 2 to climb, the hydraulic climbing jacks are positioned on the same horizontal plane to ensure that there are no obstructions between adjacent hydraulic climbing jacks. The infrared level transmitter and the infrared level receiver 41 are turned on. At this time, the infrared level transmitter is aligned with the infrared level receiver 41 of the adjacent hydraulic climbing jack, and then the hydraulic climbing jacks drive the truss 2 to climb.

[0059] At this time, due to the existence of random errors among several hydraulic climbing jacks, there is a probability that there are different degrees of lifting differences. According to the specification, the lifting difference between adjacent hydraulic climbing jacks for each climb is not greater than 20mm, that is, the motion error of adjacent hydraulic climbing jacks is less than or equal to 20mm. When the infrared signal received by the infrared level receiver 41 of a hydraulic climbing jack shows that the deviation of the infrared signal of the adjacent infrared level transmitter from the standard position exceeds 20mm, the control module issues an alarm;

[0060] At the same time, a pull rope positioner is installed at the lower part of the same side of the infrared level receiver 41 to facilitate data transmission, and the pull rope rod is installed at the lower end of the hydraulic climbing jack;

[0061] Compared with the scheme of directly setting an infrared rangefinder under the climbing truss 2 or the hydraulic climbing jack, and calculating whether the template 3 has moved into place by calculating its position relative to the infrared rangefinder, in this scheme, when there are several jacks, several infrared rangefinders will not be needed, and the several infrared rangefinders need to measure the distance between themselves and the measuring point respectively, upload them to the calculation module, and then the calculation module calculates the difference of several distance data, and then judges the distance between several points and the infrared rangefinder, and then judges the horizontality and consistency of the climbing. However, this scheme has more calculation steps, and there is a probability of causing errors in each data measurement, conversion and calculation process. The probability of generating errors in multiple data measurement, conversion and calculation processes is relatively high, and there is a high probability of causing inaccurate positioning. On the contrary, it is only necessary to judge the position deviation value of the infrared device of the hydraulic climbing jack and the infrared device of the adjacent hydraulic climbing jack to directly obtain the deviation position, which reduces the data measurement, conversion and calculation steps and improves the positioning accuracy.

[0062] By simultaneously installing mutually aligned infrared level transmitters and infrared level receivers 41 on a plurality of hydraulic climbing jacks, the plurality of hydraulic climbing jacks can be calibrated and positioned with respect to each other, thus reducing the steps of data measurement, conversion and calculation and improving positioning accuracy.

[0063] After step 4 is completed, the four templates 3 are lifted to coincide with the height of the third floor of the main tower 1, and then step 5 is performed: the embedded parts 6 are positioned and installed on the templates 3 before mold closing, and the rearward moving device drives the templates 3 close to the main tower 1 for mold closing. After mold closing, the third floor of the main tower 1 is poured, and after pouring, the fourth floor of the main tower 1 is tied with steel bars;

[0064] Specifically, in step 5, after the template 3 reaches the predetermined position, the hydraulic system 4 is stopped, and the embedded part 6 is positioned and installed on the template 3, and butter is applied inside;

[0065] Then the mold is closed, during which the angle is adjusted by using the diagonal brace, and the upper and lower positions of the template 3 are accurately adjusted by the template 3 adjustment device, the third layer of concrete of the main tower 1 is poured, and the fourth layer of steel bars of the main tower 1 are tied;

[0066] Then, step six is ​​performed: after the concrete strength of the main tower 1 reaches the standard, the formwork is removed, the formwork 3 is moved back, and the wall attachment device is installed on the embedded part 6;

[0067] Specifically, after the concrete strength of the third-floor main tower 1 reaches the standard, the formwork is removed, the template 3 and the upper layer of the truss 2 are moved backward using the backward moving device, and the wall attachment device is installed at the embedded part 6;

[0068] Adjust the steering box upward and start the hydraulic system 4. At this time, the truss 2 and the formwork 3 are maintained in place under the action of gravity, together with the hydraulic system 4. The hydraulic system 4 moves the guide rail 7 upward relative to the truss 2, completes the lifting of the guide rail 7, and fixes the guide rail 7 to the wall attachment device on the third floor.

[0069] Then proceed to step seven: Repeat steps four to six until the construction is completed.

[0070] Specifically, in order to ensure that in addition to adjusting the position of the template 3 in the direction perpendicular to the side of the main tower 1, the position of the template 3 can also be adjusted in the direction parallel to the side of the main tower 1 and parallel to the ground, the upper section of the truss 2 is connected to the template 3 by a template 3 adjustment device. The template 3 adjustment device is a slide rail structure arranged between the upper section of the truss 2 and the template 3. The slide rail structure of the template 3 adjustment device is parallel to the side of the main tower 1 and parallel to the ground. At this time, the template 3 adjustment device can drive the template 3 to move in the direction parallel to the side of the main tower 1 and parallel to the ground, thereby realizing the adjustment of the position of the template 3.

[0071] By providing the adjustment device, the operator can further adjust the position of the template 3 during the operation, thereby improving the positioning accuracy of the template 3.

[0072] Specifically, for the template 3 adjustment device, the load-bearing cross bar is placed under the template 3 beam. Adjustment of the same height only requires one load-bearing cross bar to be supported under the template 3 beam, and can be connected to multiple jacks. The receiving plate is fixed to the lower section of the load-bearing cross bar by the cross bar anchor screws. The upper part of the jack piston is connected to the upper load-bearing cross bar and the receiving plate through the adapter plate. The jack inputs hydraulic oil through the oil inlet and returns oil through the oil return port, so that the piston moves upward, and vice versa. The main shell of the jack is fixed to the truss 2 by fixing screws.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A climbing formwork construction method for a main tower of a cross-sea cable tower bridge, characterized in that: The following steps are involved: Step 1: When tying the first layer of steel bars of the main tower, the required embedded parts are embedded at the designed position of the wall attachment device of the first layer, and the first layer of concrete of the main tower is poured. After the concrete strength of the main tower reaches the standard, the formwork is removed and the wall attachment device is installed at the embedded parts of the first layer of the main tower; Step 2: Assemble the truss, assemble the formwork on the truss, lift the assembled truss, hang it on the wall attachment device of the first floor of the main tower, locate and install the embedded parts on the design position formwork of the wall attachment device of the second floor, the truss drives the formwork to move to the target position to complete the mold closing, then pour the second floor concrete of the main tower, and tie the third floor steel bars; Step 3: After the main tower concrete strength reaches the standard, the formwork is removed, the formwork is moved back, the wall attachment device is installed at the embedded parts on the second floor, the guide rail parallel to the extension direction of the main tower is hoisted, and the hydraulic system and synchronous climbing monitoring system are established; Step 4: The hydraulic system climbs, and at the same time, the hydraulic synchronous climbing monitoring systems between different trusses ensure that they are in a synchronous motion state, thereby ensuring that the trusses and templates are climbing synchronously. After climbing into place, install the hanging platform at the bottom of the truss; Step 5: Before closing the mold, the embedded parts of the third-layer wall-attaching device are positioned and installed on the template, and the mold is closed. After the mold is closed, the third-layer concrete of the main tower is poured and the fourth-layer steel bars are tied; Step 6: After pouring is completed and the main tower concrete strength reaches the standard, remove the formwork, move the formwork back, and install the wall attachment device on the third-layer embedded parts; Step 7: Repeat steps 4 to 6 until the construction is completed.

2. A climbing formwork construction method for a main tower of a cross-sea cable tower bridge according to claim 1, characterized in that: The step three also includes: installing a hydraulic climbing jack and a steering box on the truss, connecting the hydraulic pump station and the hydraulic climbing jack with an oil pipe, and electrically connecting the hydraulic pump station, the hydraulic climbing jack and the control module to form a complete hydraulic system; installing a rope positioner, a rope rod, an infrared horizontal receiver and an infrared horizontal transmitter on the hydraulic climbing jack to form a hydraulic synchronous climbing monitoring system.

3. A climbing formwork construction method for a main tower of a cross-sea cable tower bridge according to claim 1, characterized in that: The step three also includes: after the hydraulic system is formed, performing a system test to check the start, stop and speed regulation functions of the hydraulic pump station.

4. A climbing formwork construction method for a main tower of a cross-sea cable tower bridge according to claim 1, characterized in that: The step four also includes: in the initial stage of hydraulic climbing, each hydraulic climbing jack is positioned on the same horizontal plane, and it is ensured that there are no obstructions between adjacent hydraulic climbing jacks; then the infrared horizontal transmitting instrument and the infrared horizontal receiving instrument are turned on, so that the central transmitting point of the infrared horizontal transmitting instrument is facing the center of the receiving slot of the infrared horizontal receiving instrument; after the climbing formwork reaches the specified position, the hydraulic pump station is instructing the control module to adjust the hydraulic climbing jacks, and finally the hydraulic system is turned off after the central transmitting point of the infrared horizontal transmitting instrument is facing the center of the receiving slot of the infrared horizontal receiving instrument.

5. The climbing formwork construction method for the main tower of a cross-sea cable tower bridge according to claim 1 is characterized in that: The step three also includes: setting a receiving slot with a 20mm scale on the infrared level receiver.

6. A climbing formwork construction method for a main tower of a cross-sea cable tower bridge according to claim 1, characterized in that: The step 2 also includes: when assembling the trusses, setting a template adjustment device so that the template can approach or move away from the main tower in a direction perpendicular to the guide rail.

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