Construction method of double tower column cable tower

Abstract

The present application provides a double-tower cable tower construction method, which includes the following steps: installing a lifting and jacking integrated self-climbing crane between two adjacent tower columns along the transverse bridge direction that meet the construction height requirements; using the lifting and jacking integrated self-climbing crane to lift steel tower segments to connect the tower columns; after the two tower columns are constructed to the target height, the upper crossbeam and the lower crossbeam are lifted in sequence from top to bottom to the specified height position and connected to the two tower columns; and the temporary steel crossbeams and the lifting and jacking integrated self-climbing crane are dismantled in sequence to complete the construction of the double-tower cable tower.

Description

Technical Field

[0001] The present application relates to the field of twin-tower column cable tower construction, and in particular to a twin-tower column cable tower construction method. Background Art

[0002] A cable-stayed bridge, also known as a cable-tensioned bridge, features a main girder directly attached to the towers by numerous cables. The structure is composed of compression-bearing towers, tension-bearing cables, and a bending-bearing beam. It can be considered a multi-span elastically supported continuous beam with cables replacing buttresses. This reduces bending moments within the beam, lowering building height, reducing structural weight, and conserving materials.

[0003] Cable-stayed bridges primarily consist of towers, main beams, and stay cables. Currently, tower cranes are commonly used to hoist bridge components such as the steel tower segments and steel crossbeam segments. Due to the heavy weight of these segments, large-capacity tower cranes are often required, resulting in high costs. Furthermore, during construction, the tower crane's attachment to the wall exerts a significant horizontal thrust on the tower, easily exceeding the structural load limits of the tower and significantly impacting the bridge's load-bearing capacity. Summary of the Invention

[0004] The purpose of this application is to provide a double-tower cable tower construction method that is suitable for constructing double-tower cable towers and does not require the use of a wall-mounted tower crane to lift bridge structures. It mainly adopts a self-climbing crane with an integrated lifting and jacking structure. The crane can not only achieve its own self-climbing, but also use the tower as the supporting structure of the crane to lift the bridge structure, ensuring the stability of the double-tower cable tower construction, eliminating the need for a large-tonnage tower crane, and saving costs.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A double-tower column and cable tower construction method comprises the following steps:

[0007] Install a self-climbing crane with integrated lifting and jacking between two adjacent towers along the transverse direction of the bridge that meet the construction height requirements;

[0008] Use the hoisting and jacking integrated self-climbing crane to lift the steel tower segments and connect the tower columns;

[0009] After both towers have been constructed to the target height, the upper and lower beams are hoisted in order from top to bottom to the designated heights and connected to the two towers;

[0010] The temporary steel beams and the integrated self-climbing crane for lifting and jacking were dismantled in sequence to complete the construction of the double tower column and cable tower.

[0011] It is further provided that: the lifting and jacking integrated self-climbing crane includes a main truss, a sliding support frame, a lifting and jacking integrated overhead crane system, a winch lifting system and a construction operation platform;

[0012] The main truss is erected along the transverse direction of the bridge on two adjacent tower columns that have met the construction height;

[0013] The sliding support frame is located below the main truss to support the main truss, and two groups of sliding support frames are respectively provided corresponding to the two tower columns. Each group of sliding support frames includes a sliding support main frame body, a sliding step and a tower wall fixed hinged support. The sliding step is provided between the sliding support main frame body and the main truss to drive the sliding support frame body to move along the length direction of the main truss. The tower wall fixed hinged support is hinged on the sliding support body, and the tower wall fixed hinged support is connected to the side wall of the tower column by bolts;

[0014] Two sets of the integrated lifting and jacking overhead crane systems are provided on the main truss, and the integrated lifting and jacking overhead crane systems can move along the length direction of the main truss. The integrated lifting and jacking overhead crane system includes a lifting overhead crane frame, a continuous climbing mechanism, a lifting frame and a sling. The lifting overhead crane frame is provided on the main truss and a driving mechanism for pushing the lifting overhead crane frame to move along the length direction of the main truss is provided therebetween. The continuous climbing mechanism is provided on the lifting overhead crane frame for lifting the lifting overhead crane frame in a vertical direction. The lifting frame moves along the length direction of the lifting overhead crane frame. The winch lifting system is connected to the sling through the lifting frame for lifting the sling to lift the structure.

[0015] Further configuration: The continuous climbing mechanism of the lifting and jacking integrated overhead crane system includes a lifting column and a climbing cylinder. The lifting column is provided with a plurality of sockets arranged along its length direction. The climbing cylinder is arranged on the lifting overhead crane frame. The protruding end of the piston rod of the climbing cylinder is provided with a plug-in pin that enters and exits the socket to push the lifting column to move in a direction perpendicular to the lifting overhead crane frame.

[0016] Further configuration: the method of using the lifting and jacking integrated self-climbing crane to lift the steel tower segments to connect the tower columns includes the following steps:

[0017] Use the crane-type integrated overhead crane system and winch lifting system to hoist the steel tower segment to the top of the installed tower column segment for height connection;

[0018] The continuous climbing mechanism of the integrated crane system is used to move from the currently connected tower segment to the top of the installed tower segment, and then the next tower segment is hoisted.

[0019] Repeat the above steps until the tower is constructed to the target height.

[0020] Further configuration: the continuous climbing mechanism of the lifting and jacking integrated overhead crane system is moved from the current steel tower segment to the top of the installed steel tower segment, including the following steps:

[0021] The lifting device for lifting the steel tower segment is anchored on the top of the currently installed steel tower segment;

[0022] The lifting column of the continuous climbing mechanism is driven by the climbing cylinder, and the bottom of the lifting column abuts against the sling anchored on the top of the installed steel tower segment, and the lifting column and the sling are locked by the anchor seat and plug pin set on the top of the sling;

[0023] After the crane frame climbs to the target height of the lifting column under the drive of the climbing cylinder, the sliding support frame and the tower column are released, and the main truss is lifted to the bottom of the crane frame by the winch lifting system, and then the sliding support frame is anchored to the currently installed tower column segment on the top through the tower wall fixed hinged support.

[0024] Further setting: In the process of connecting the tower columns, the lifting and jacking integrated overhead crane system and the winch lifting system are used to lift temporary beams from bottom to top to different height positions of the tower columns to connect the two tower columns.

[0025] Further setting: after the tower column is constructed to the preset tower top height, an assembly bracket is set at the bottom of the tower, and the height position of the assembly bracket is consistent with the installation position height of the lower crossbeam;

[0026] The crossbeam segments are hoisted onto the assembly bracket using a lifting and jacking integrated self-climbing crane to assemble into an integral upper crossbeam, and then the upper crossbeam is hoisted as a whole to the upper crossbeam installation station by the lifting and jacking integrated self-climbing crane and installed and fixed.

[0027] Further setting: When installing the lower crossbeam, use a lifting and jacking integrated self-climbing crane to lift the crossbeam segments in three sections, first lift the crossbeam segments at both ends for installation, and finally lift the middle segment to close the lower crossbeam.

[0028] Further settings: After the construction of the tower columns and beams is completed, the assembly brackets used to assemble the beams, the temporary beams used to connect the two tower columns, and the integrated self-climbing crane for lifting and jacking are removed from bottom to top.

[0029] Further setting: When dismantling the self-climbing crane with integrated lifting and jacking, support its integrated lifting and jacking overhead crane system on the top of the completed tower column, release the connection between the sliding support frame at the bottom of its main truss and the tower column, use the winch lifting system to lower the main truss as a whole to the ground, and then use the tower crane to dismantle the integrated lifting and jacking overhead crane system at the top of the tower column.

[0030] Compared with the existing technology, the solution of this application has the following advantages:

[0031] 1. In the double-cable tower construction method of the present application, the self-climbing crane with integrated lifting and jacking can not only realize its own self-climbing, but also use the tower column as the supporting structure of the crane. In addition to being able to lift the steel tower segment of the tower column, it can also be used to lift the beam structure between the double tower columns. There is no need to use a tower crane attached to the tower column to lift the crane and bridge structure. The crane has good structural stability and load-bearing capacity, ensuring the stability of the lifting process and convenient construction.

[0032] 2. In the double cable tower construction method of the present application, the construction of the two tower columns of the cable tower is completed first, and then the beams are hoisted from the bottom of the tower in a top-down order. In the process of constructing the tower columns, temporary beams are installed to replace the beams to ensure the structural stability of the tower columns during construction.

[0033] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0035] Figure 1 This is a structural schematic diagram of an embodiment of the lifting and jacking integrated self-climbing crane of the present application;

[0036] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0037] Figure 3 A side view of an embodiment of the self-climbing crane with integrated lifting and jacking according to the present application;

[0038] Figure 4 This is a structural diagram of the continuous climbing mechanism of the self-climbing crane with integrated lifting and jacking in this application;

[0039] Figure 5 This is a schematic diagram of the connection structure between the continuous climbing mechanism and the double-anchor spreader in the self-climbing crane with integrated lifting and jacking in this application;

[0040] Figure 6 This is a schematic diagram of the structure of the hoisting device in the self-climbing crane with integrated lifting and jacking in this application;

[0041] Figure 7 This is a top view of the structure of the spreader in the lifting and jacking integrated self-climbing crane of this application;

[0042] Figure 8This is a schematic diagram of the structure of the construction operation platform of the self-climbing crane with integrated lifting and jacking in this application;

[0043] Figure 9 This is a process flow chart of the method for constructing a double-tower column and cable tower using an integrated self-climbing crane for lifting and jacking in this application.

[0044] In the figure, 1. main truss; 2. sliding support frame; 21. sliding support main frame; 22. sliding step; 221. sliding seat; 222. sliding cylinder; 23. tower wall fixed hinged support; 231. fixed seat; 232. connecting seat; 3. lifting and jacking integrated overhead crane system; 31. lifting overhead crane frame; 32. continuous climbing mechanism; 321. lifting column; 322. climbing cylinder; 33. lifting frame; 331. roller; 332. transverse cylinder; 34. sling; 3411. upper hanging beam; 3412. lower hanger; 342. lifting claw; 343. movable pulley block ; 344. Hydraulic cylinder; 345. Rotating structure; 3451. Inner ring; 3452. Outer ring; 3453. Motor; 346. Anchor seat; 35. Driving mechanism; 36. Lifting and paralleling mechanism; 361. Parallel connection; 362. Double-head lifting cylinder; 4. Winch lifting system; 41. Winch; 42. Wire rope; 43. Rope reel; 5. Construction operation platform; 51. Overhead crane operation and maintenance platform; 52. Upper maintenance platform; 53. Lower maintenance platform; 54. Horizontal sliding welding platform; 55. Longitudinal welding platform; 56. Repair platform; 57. Upper and lower channels. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limiting the present application.

[0046] See Figures 1 to 8 In view of the construction of existing single-tower or double-tower cable towers, this application proposes a self-climbing crane with integrated lifting and jacking, which can realize the self-climbing of the crane without the need to set up large-scale lifting equipment and can be applied to cable tower construction in different geographical environments.

[0047] The self-climbing crane with integrated lifting and jacking (hereinafter referred to as the "crane") includes a main truss 1, a sliding support frame 2, an integrated lifting and jacking overhead crane system 3, and a winch system 4. The main truss 1 is erected on top of a tower column that has met construction requirements. The sliding support frame 2 is located below the main truss 1 and is anchored to the tower column to support the main truss 1. The integrated lifting and jacking overhead crane system 3 is located above the main truss 1 and is used to lift bridge structures and enable the crane to self-climb. The lifting and jacking integrated overhead crane system 3 includes a lifting crane frame 31, a continuous climbing mechanism 32, a lifting frame 33 and a sling 34. The lifting crane frame 31 can move along the length direction of the main truss 1 to transport the hoisted bridge structure to the top of the tower column and lower it to the right position. The lifting frame 33 is set on the lifting crane frame 31. The winch system 4 is connected to the sling 34 through the lifting frame 33, so that the sling 34 is used to lift the structure.

[0048] The lifting and jacking integrated self-climbing crane of the present application is mainly used for the construction of cable towers, so the bridge structures hoisted are tower column segments or tower column beams.

[0049] Specifically, the main truss 1 utilizes a two-piece truss structure, comprising two parallel trusses and a central parallel connecting the two trusses. The main truss 1 is provided with an opening along at least one end of its length, and the opening of the main truss 1 is tilted downward toward its centerline to facilitate the lifting and jacking integrated overhead crane system 3 to lift the bridge structure from the opening of the main truss 1 into the interior of the main truss 1 and transport it to the corresponding lowering station. Tracks (not shown) are provided at the top and bottom of the main truss 1 to guide the movement of the lifting and jacking integrated overhead crane system 3 above the main truss 1 and the sliding support frame 2 provided at the bottom of the main truss 1, respectively.

[0050] The sliding support frame 2 provided at the bottom of the main truss 1 is the main load-bearing structure connecting the crane of this application and the tower column. The sliding support frame 2 includes a sliding support main frame 21, a sliding step 22 and a tower wall fixed hinged support 23. The length direction of the sliding support main frame 21 is perpendicular to the length direction of the main truss 1. The sliding step 22 is provided between the main truss 1 and the sliding support main frame 21, so as to push the sliding support main frame 21 to move along the length direction of the main truss 1 through the sliding step 22. The sliding step 22 includes two sliding seats 221 and a sliding oil cylinder 222 arranged between the two sliding seats 221. The two sliding seats 221 are both coordinated with the track located at the bottom of the main truss 1. The two sliding seats 221 are both provided with plug-in pins for plugging and cooperating with the main truss 1. Among the two sliding seats 221, the sliding seat 221 close to the sliding support main frame 21 is connected to the sliding support main frame 21. The cooperation between the two sliding seats 221 and the sliding oil cylinder 222 can realize the movement of the sliding support frame 21 along the length direction of the main truss 1.

[0051] The tower wall fixed hinged support 23 is hinged on the side of the sliding support main frame 21 close to the tower column. The tower wall fixed hinged support 23 includes a fixed seat 231 and a connecting seat 232 that are hinged to each other. The fixed seat 231 is installed on the sliding support main frame 21, and the connecting seat 232 can be connected and fixed with the pre-embedded connecting parts on the side wall of the tower column through high-strength bolts.

[0052] Preferably, in this embodiment, a set of sliding support frames 2 is provided on each side of the tower column. The two sets of sliding support frames 2 support the main truss 1. Each set of sliding support frames 2 has two sets of sliding steps 22 corresponding to the two-piece truss structure of the main truss 1, so that the two sets of sliding steps 22 push the sliding support frames 2 toward or away from the tower column along the length direction of the main truss 1. At the same time, the sliding support main frame body 21 is connected to the tower column by providing four tower wall fixed hinged supports 23 to ensure the connection strength between the sliding support main frame body 21 and the tower column.

[0053] The sliding support main frame 21 of the two groups of sliding support frames 2 on both sides of the above-mentioned tower column is driven by the sliding steps 22 to approach the tower column, and the tower wall fixed hinged support 23 is anchored to the tower column, so that the entire machine load of the crane of this application is transmitted to the tower column through the sliding support frame 2 and then through the tower wall fixed hinged support 23, thereby effectively supporting the crane of this application.

[0054] The integrated hoisting crane system 3 can realize the self-climbing of the crane of the present application and the lifting of bridge structures. That is, the main truss 1 can climb to the top of the installed tower column segment under the drive of the integrated hoisting crane system 3 to install the next tower column segment. The sliding support frame 2 rises and falls with the rise and fall of the main truss 1. When the crane of the present application is lifting a bridge structure, the tower wall fixed articulated supports 23 of the sliding support frame 2 are all anchored to the side walls of the tower column. When the crane of the present application is climbing, all the tower wall fixed articulated supports 23 are released from the constraints with the tower column, and the sliding steps 22 drive the sliding support frame 21 away from the tower column to facilitate the lifting operation of the main truss 1.

[0055] The integrated lifting and jacking overhead crane system 3 can move along the length direction of the main truss 1. The integrated lifting and jacking overhead crane system 3 includes a lifting crane frame 31, a continuous climbing mechanism 32, a lifting frame 33 and a sling 34. A driving mechanism 35 is provided between the lifting crane frame 31 and the main truss 1. The driving mechanism 35 includes a driving seat and a driving cylinder. The driving seat cooperates with the track at the top of the main truss 1, and the driving seat is provided with a plug-in pin for plugging with the track. The driving cylinder is provided between the driving seat and the lifting crane frame 31, and the driving cylinder intermittently extends and retracts to push the lifting crane frame 31 to move along the length direction of the main truss 1.

[0056] Furthermore, the lifting trolley frame 31 spans across two trusses of the main truss 1 , and two sets of driving mechanisms 35 are provided between the lifting trolley frame 31 and the main truss 1 corresponding to the two trusses, thereby improving the lateral stability of the lifting trolley frame 31 .

[0057] The continuous climbing mechanism 32 is provided in the crane frame 31 and includes a lifting column 321 and a climbing cylinder 322. The crane frame 31 is provided with a through-hole (not shown), through which the lifting column 321 extends. The lifting column 321 is provided with a plurality of sockets (not shown) arranged along its length. The climbing cylinder 322 is provided on the crane frame 31, and the extended end of its piston rod is provided with a plug-in pin that engages with the sockets of the lifting column 321. Furthermore, at least two sets of climbing cylinders 322 are provided for each lifting column 321. By alternately extending and retracting different sets of climbing cylinders 322, the lifting column 321 can be pushed and moved along its length (vertical direction in this embodiment).

[0058] Preferably, this embodiment is provided with four lifting columns 321. Four corresponding through-holes are provided on the crane frame 31, and the line connecting the four through-holes is rectangular. Furthermore, the through-holes are arranged as square holes, and the lifting columns 321 are arranged as square columns. Therefore, in this embodiment, four groups of climbing cylinders 322 are provided corresponding to the four faces of the square columns, and the four groups of climbing cylinders 322 are arranged along the periphery of the through-holes. Furthermore, the four groups of climbing cylinders 322 are arranged in pairs, and the two climbing cylinders 322 in the same group extend and retract synchronously, and are arranged opposite each other on opposite faces of the lifting columns 321. It should also be noted that each group of climbing cylinders 322 includes at least one cylinder for pushing the lifting columns 321, and the greater the number of cylinders provided, the greater the support capacity for the lifting columns 321. Therefore, in this embodiment, each group of the climbing cylinders 322 is provided with three cylinders arranged side by side for synchronous extension and retraction, and the ends of the protruding ends of the piston rods of the three cylinders are provided with mounting seats (not marked), and the plug-in pins that are plugged into the lifting columns 321 are fixed on the mounting seats.

[0059] Furthermore, a lifting parallel connection mechanism 36 is provided between adjacent two of the four lifting columns 321. The lifting parallel connection mechanism 36 comprises a parallel connection 361 and a double-ended lifting cylinder 362. The double-ended lifting cylinder 362 is provided at both ends of the parallel connection 361. The double-ended lifting cylinder 362 has a retractable piston rod at both ends, and the extended ends of the piston rods are provided with plug pins that can be plugged into the lifting columns 321. The lifting parallel connection 361 structure connects two adjacent lifting columns 321, ensuring the synchronous raising and lowering of the lifting columns 321.

[0060] The lifting frame 33 is provided at each end of the trolley frame 31, and the lifting frame 33 is movable along its length relative to the trolley frame 31. Specifically, the trolley frame 31 is provided with a transverse oil cylinder 332 that is telescopic along its length, and the extended end of the piston rod of the transverse oil cylinder 332 is connected to the lifting frame 33. At the same time, guide rails (not shown) extending along its length are provided at both ends of the trolley frame 31, and the lifting frame 33 is provided with guide grooves (not shown) that cooperate with the guide rails, so that the position of the lifting frame 33 on the trolley frame 31 can be adjusted by the transverse oil cylinder 332.

[0061] The hoisting frame 33 is provided with a roller 331. The winch hoisting system 4 of the present application mainly uses a winch 41 in combination with a steel wire rope 42 for hoisting operations. The steel wire rope 42 of the winch hoisting system 4 passes through the roller 331 on the hoisting frame 33 and is connected to the sling 34. That is, the hoisting frame 33 guides the steel wire rope 42. The position of the hoisting frame 33 can be adjusted by adjusting the position of the lateral oil cylinder 332 to adjust the position of the steel wire rope 42 to adapt to the connection with slings 34 of different specifications. The sling 34 includes a hanger and a lifting claw 342. The lifting claw 342 is provided below the hanger for connection with the bridge structure to be lifted. The hanger is provided with a movable pulley set 343 for connecting with the steel wire rope 42 passing through the above-mentioned hoisting frame 33. Two sets of movable pulleys 343 are provided at both ends of the sling 34, which correspond to the rollers 331 of the two lifting frames 33 on the lifting trolley frame 31 respectively. Therefore, the winch lifting system 4 is provided with two sets of steel wire ropes 42 to pass through the rollers 331 of the two lifting frames 33 and connect with the movable pulleys 343 at both ends of the hanger, that is, the steel wire ropes 42 lift the hanger by connecting the movable pulleys 343 at both ends of the hanger, which has high lifting stability and improves the construction safety of the lifting.

[0062] The hanger includes an upper hanging beam 3411 and a lower hanging beam 3412. The movable pulley assembly 343 is disposed at both ends of the upper hanging beam 3411, and the lifting claws 342 are disposed on the bottom side of the lower hanging beam 3412. The lower hanging beam 3412 is an H-shaped frame, and the sling 34 is disposed at each of the four corner ends of the lower hanging beam 3412. Each lifting claw 342 has four claws. In addition, a hydraulic cylinder 344 is provided on the lower hanging beam 3412, corresponding to each lifting claw 342. The hydraulic cylinder 344 pushes the lifting claw 342 to slide on the lower hanging beam 3412, thereby changing the position of the lifting claw 342 according to the lifting point position of the bridge structure to be lifted. In other words, the sling 34 is an adjustable sling 34 to accommodate the lifting of bridge structures of different specifications.

[0063] The upper hanging beam 3411 is arranged above the middle connecting beam of the lower hanger 3412, and a rotating structure 345 is provided between the upper hanging beam 3411 and the lower hanger 3412. The rotating structure 345 includes an inner ring 3451 and an outer ring 3452 arranged coaxially, and the inner ring 3451 and the outer ring 3452 can rotate relative to each other. The outer ring 3452 is bolted to the upper hanging beam 3411, and the inner ring 3451 is bolted to the lower hanger 3412. The upper hanging beam 3411 is provided with a rotating structure 345. The motor 3453 drives the rotation of the inner ring 3451. The inner ring 3451 is provided with a full circle of internal teeth. The output shaft of the motor 3453 is provided with a gear meshing with the internal teeth. When the motor 3453 rotates, the upper hanging beam 3411 and the lower hanger 3412 are driven to rotate relative to each other through the meshing of the gears. The motor 3453 has a self-locking function. When the motor 3453 stops rotating, the relative positions of the upper hanging beam 3411 and the lower hanger 3412 are fixed. The hanger of the present application is provided with a slewing structure 345 between the upper hanging beam 3411 and the lower hanger 34. It can be applied to the situation where the tower column segment gradually widens along the longitudinal direction of the bridge. When hoisting, the short side is located along the longitudinal direction of the bridge and the long side is located in the transverse direction of the bridge. After lifting to the installation position, it is rotated 90 degrees for installation. Otherwise, the active cross brace and temporary cross beam between the cable towers need to be installed to the transverse direction of the tower column to avoid interference with the installation of the tower column and the cross beam.

[0064] The hoisting system 4 includes a hoist 41, a wire rope 42 and a rope reel 43. Due to the limited spatial arrangement of the hoisting system, in this embodiment, the hoist 41 is set on the hoisting trolley frame 31 and moves with it, and the rope reel 43 is arranged at the bottom of the tower column. Preferably, the present application preferably adopts a friction type hoist 41. When the friction type hoist 41 is in operation, the wire rope 42 only passes through and does not get entangled on the hoist 41, thereby separating the hoist 41 from the rope reel 43. One end of the wire rope 42 is reeled on the rope reel 43, and the other end passes through the hoist 41, and then passes through the roller 331 on the lifting frame 33 and is connected to the movable pulley group 343 on the sling 34. The friction between the hoist 41 and the wire rope 42 is used to pull the sling 34 for lifting.

[0065] In this embodiment, the lifting capacity of each hoist system 4 is 300 tons, and the diameter of the wire rope 42 is Model selection The breaking force of the steel wire rope 42 is 99.4 tons, and the lifting speed under rated load is 6 m / min. The total length of the steel wire rope 42 is 3000 m x 4. The weight of a single friction winch 41 is 30 tons, and the weight of a single rope retractor is 10 tons.

[0066] In addition, after the crane of the present application has completed the lifting of the current tower column segment, it can use the continuous climbing mechanism 32 to climb to the top of the current tower column segment. At this time, the sling 34 is kept fixed to the top of the tower column segment, and the climbing cylinder 322 is used to lower the lifting column 321 so that its bottom is anchored to the top of the sling 34. The sling 34 is a double-anchor sling 34, which is provided with four sets of anchor seats 346 corresponding to the positions of the four lifting columns 321. Each of the anchor seats 346 is provided with a plug-in pin. When the bottom of the lifting column 321 abuts against the sling 34, the plug-in pin can be inserted into the socket at the bottom of the lifting column 321 to achieve anchoring between the lifting column 321 and the beam of the sling 34. Furthermore, each set of anchoring seats 346 includes at least two anchoring seats 346 corresponding to each lifting column 321. By anchoring at least two points of the lifting column 321, the connection strength between the lifting column 321 and the sling 34 is ensured. In this embodiment, each set of anchoring seats 346 includes four anchoring seats 346, corresponding to the four sides of each lifting column 321, ensuring a stable and high anchoring between the lifting column 321 and the sling 34.

[0067] Next, the climbing cylinder 322 on the crane frame 31 is extended and retracted to allow the crane frame 31 to climb along the lifting columns 321, and the crane frame 31 can be stopped after climbing to the desired position. The main truss 1 can climb along with the crane frame 31. Before the main truss 1 climbs along with the crane frame 31, the anchoring between the sliding support frame 2 and the tower column should be released. The sliding support frame 2 slides a distance and completely separates from the tower column, allowing the main truss 1 to be relatively free from the tower column. At this time, the load of the crane is transferred to the top of the tower column through the lifting columns 321 and the sling 34 to bear the load. Alternatively, before the crane frame 31 climbs, the restriction between the crane frame 31 and the main truss 1 is first released. After the crane frame 31 climbs into place, the restriction between the wire rope 42 and the sling 34 is released, and a temporary sling 34 is set at the end of the wire rope 42 used for lifting. The lifting frames 33 at both ends of the crane frame 31 are adjusted to adjust the position of the temporary sling 34 to connect with the main truss 1. At this time, the connection between the sliding support frame 2 and the tower column is released, and the main truss 1 and the sliding support frame 2 are lifted to the lower position of the crane frame 31 by using the temporary sling 34. The crane frame 31 is then connected to the main truss 1, and the sliding support frame 2 is anchored to the currently installed tower column segment at the top, thereby completing the self-climbing of the crane of this application.

[0068] The self-climbing of the crane in this application mainly relies on the cooperation between the climbing cylinder 322 and the plug-in pin. A multi-point synchronous control system is used to ensure the consistency and synchronization of the actions of all lifting cylinders. The synchronous control system adopts a mature load-sensitive electro-hydraulic proportional multi-way valve in the hydraulic system design, which can realize point-to-point independent control of all lifting cylinders. During the lifting process, the electronic control system can obtain the position of the cylinder piston rod based on the displacement sensor set on the cylinder, and adjust the oil supply of each proportional valve in real time according to the different positions of the cylinder. By adopting the PID algorithm (i.e., a control algorithm that combines the three links of proportional, integral, and derivative), the synchronous control of all lifting cylinders in the whole process is realized.

[0069] In summary, the self-climbing crane with integrated lifting and jacking of the present application integrates lifting and self-climbing in one, and does not require the installation of additional large-scale lifting equipment. It solves the problems of high cost and slow progress of existing tower crane lifting structures. After the construction of a single-section structure is completed, the crane of the present application is lifted to the lifting position of the next section through a continuous lifting structure, and the cycle is carried out in sequence. The process operation is simple, which saves construction time and improves construction efficiency.

[0070] Moreover, the self-climbing crane with integrated lifting and jacking function of the present application is not only suitable for the construction of cable towers with single-tower structures, but also can meet the construction requirements of cable towers with double-tower structures.

[0071] Specifically, during the construction of a cable tower with a single tower column structure, the main truss 1 is erected at the top tower column segment of the tower column that meets the construction height requirements. By arranging a set of lifting and jacking integrated overhead crane system 3 on the main truss 1, the lifting operation of the tower column segment can be completed.

[0072] Therefore, the method for using the lifting and jacking integrated self-climbing crane of the present application includes the following steps:

[0073] S001. Install a self-climbing crane with integrated lifting and jacking at the top of a tower column that meets the construction height requirements. The main truss 1 of the self-climbing crane with integrated lifting and jacking is installed on the top of a single tower column in the transverse direction of the bridge. Two sets of sliding support frames 2 are arranged along the longitudinal direction of the bridge and are installed on both sides of the tower column. A crane system with integrated lifting and jacking 3 and a winch hoisting system 4 are installed on the main truss 1.

[0074] S002. Use the lifting integrated overhead crane system 3 and the winch lifting system 4 to lift the steel tower segment from one end of the main truss 1 in the length direction to the top of the installed tower column segment for installation.

[0075] The main truss 1 is provided with an inclined opening at one end in the length direction to facilitate the lifting and jacking integrated overhead crane system 3 and the winch lifting system 4 to lift the steel tower segment into the main truss 1 for transportation. The position of the lifting and jacking integrated overhead crane system 3 on the main truss 1 is controllable, thereby ensuring that the lifted steel tower segment is accurately aligned with the installed tower column, thereby ensuring the installation accuracy of the tower column.

[0076] During the lifting of the steel tower segment by the hoisting integrated overhead crane system 3 and the winch lifting system 4, the sliding support frame 2 below the main truss 1 is anchored to the tower column, thereby ensuring that the main truss 1 has sufficient supporting capacity to realize the lifting operation of the steel tower segment.

[0077] S003: After the installation of the hoisted steel tower segment is completed, the hoisting and jacking integrated crown crane system 3 is used to move the hoisting and jacking integrated self-climbing crane to the top of the currently installed steel tower segment.

[0078] The known integrated crane system for lifting and jacking includes a crane frame 31, a continuous climbing mechanism 32, a lifting frame 33, and a sling 34. The continuous climbing mechanism 32 includes a lifting column 321 and a climbing cylinder 322. When the crane of the present application climbs, the climbing cylinder 322 moves the lifting column 321 until it abuts against the sling 34 anchored below it at the top of the tower column. The bottom of the lifting column 321 is anchored to the sling 34 via the plug-in pins of its anchor seat 346. After ensuring that the lifting column 321, the sling 34, and the top of the tower column are anchored, the climbing cylinder 322 climbs the crane frame 31 vertically to the top of the lifting column 321. The main truss 1 can climb along with the climbing of the crane frame 31, and during the climbing process, the sliding support frame 2 at the bottom of the main truss 1 is separated from the tower column; alternatively, the crane frame 31 and the main truss 1 can be separated first, and after the crane frame 31 has climbed to its proper position, the main truss 1 can be lifted to the bottom of the crane frame 31 and then connected by the lifting frames 33 at both ends of the crane frame 31 in conjunction with the temporary lifting devices 34. It should be noted that when lifting the main truss 1, the sliding support frame 2 at the bottom of the main truss 1 is separated from the tower column, and after the main truss 1 moves to the top of the currently installed steel tower segment, the sliding support frame 2 is anchored to the top of the current tower column, thereby completing the self-climbing of the self-climbing crane with integrated lifting and jacking.

[0079] The above steps S002 and S003 are cycled, that is, the tower columns are connected by cyclic operations of hoisting steel tower segments and climbing operations of the lifting and jacking integrated overhead crane system 3 until the tower column construction is completed.

[0080] When constructing a cable tower with a double-tower structure, in addition to completing the height connection construction of a single tower column, it is also necessary to construct a crossbeam between the two tower columns. Therefore, when using a self-climbing crane with an integrated lifting system to construct a cable tower with a double-tower structure, the main truss 1 of the self-climbing crane with an integrated lifting system needs to be erected on two adjacent tower columns that meet the construction height requirements along the transverse direction of the bridge. At the same time, two groups of sliding support frames 2 are respectively provided for the two tower columns, and each group of sliding support frames 2 is provided on both sides of the corresponding tower column to ensure that both ends of the main truss 1 can be effectively supported.

[0081] In addition, when constructing a cable tower with a double-column structure, since the cable tower structure is more complicated than that of a single-column cable tower, a construction operation platform 5 can be set on the main truss 1 to facilitate the construction of workers. The construction operation platform 5 includes a crane operation and maintenance platform 51, an upper maintenance platform 52, a lower maintenance platform 53, a transverse sliding welding platform 54, a longitudinal welding platform 55 and a repair platform 56. The upper maintenance platform 52 is set on the top side of the main truss 1, the crane operation and maintenance platform 51 is set on the lifting crane frame 31, and an upper and lower passage 57 is set between the crane operation platform and the upper maintenance platform 52. The lower maintenance platform 53 is set on the lower side of the main truss 1. An upper and lower passage 57 is also provided between the repair platform 52 and the lower inspection platform 53. The upper and lower passages 57 are attached to the diagonal bracing of the main truss 1 to ensure the structural strength and stability of the upper and lower passages 57. The transverse sliding welding platform 54 is provided along the transverse direction of the bridge, and the longitudinal welding platform 55 is provided along the longitudinal direction of the bridge. The transverse sliding welding platform 54 and the longitudinal sliding welding platform are located at the top of the tower column, so that the welding operation between the two tower column segments can be performed after the tower column segment to be hoisted is hoisted to the top of the installed tower column segment. The repair platform 56 is provided at the corresponding position of the sliding support frame 2 and can be used to repair the structure of the sliding support frame 2, and an upper and lower passage 57 is provided between the repair platform 56 and the longitudinal welding platform 55. The present application sets up upper and lower passages 57 between multiple platforms at different heights for communication, and the edge protection adopts 1.5m high protective guardrails to facilitate workers to reach each construction operation platform 5 through the upper and lower passages 57, so as to complete operations at different positions.

[0082] Therefore, when the crane of the present application is used for the construction of a cable tower with a double-tower structure, a construction operation platform 5 is added to the main truss 1, and the joint design of the construction operation platform 5 and the main truss 1 enables the construction operation platform 5 to be lifted together with the main truss 1 under the drive of the continuous climbing mechanism 32, without the need to set up a conventional circumferential operation platform.

[0083] In addition, for the cable tower with a double-tower structure, two sets of integrated lifting and jacking overhead crane systems 3 are set on the main truss 1 of the present application, which can carry out synchronous construction of the two towers, thereby speeding up the construction efficiency. The cable tower with a double-tower structure also includes a crossbeam, and the two sets of the said integrated lifting and jacking overhead crane systems 3 can be used to lift the crossbeam for installation.

[0084] Please combine Figure 9 The construction method of the double-tower column and cable tower includes the following steps:

[0085] First, a self-climbing crane with an integrated lifting function is installed between two adjacent towers along the transverse direction of the bridge that meet the construction height requirements.

[0086] The self-climbing crane with integrated lifting and jacking includes a main truss 1, a sliding support frame 2, an integrated lifting and jacking overhead crane system 3, a winch lifting system 4 and a construction operation platform 5, wherein the main truss 1 is erected along the transverse bridge direction between two adjacent tower columns that have met the construction height, and the sliding support frame 2 is located below the main truss 1 and two groups are set corresponding to the two tower columns respectively. The sliding support frame 2 is anchored to the top tower column segment to achieve the function of supporting the main truss 1 and the structure above it.

[0087] Two sets of the integrated lifting and jacking overhead crane systems 3 are provided on the main truss 1, and the integrated lifting and jacking overhead crane systems 3 can move along the length direction of the main truss 1. The integrated lifting and jacking overhead crane system 3 includes a lifting overhead crane frame 31, a continuous climbing mechanism 32, a lifting frame 33 and a sling 34. The lifting overhead crane frame 31 is provided on the main truss 1 and a driving mechanism 35 for pushing the lifting overhead crane frame 31 to move along the length direction of the main truss 1 is provided therebetween. The continuous climbing mechanism 32 is provided on the lifting overhead crane frame 31 for lifting the lifting overhead crane frame 31 in a vertical direction. The lifting frame 33 moves along the length direction of the lifting overhead crane frame 31. The winch lifting system 4 is connected to the sling 34 through the lifting frame 33 for lifting the sling 34 to lift the steel tower segment.

[0088] The steel tower segments are hoisted by a self-climbing crane with an integrated lifting mechanism to raise the tower column.

[0089] Specifically, the integrated lifting and jacking overhead crane system 3 and the winch lifting system 4 are used to lift the steel tower segment to the top of the installed tower column segment for connection. After the current top tower column segment is installed, the continuous climbing mechanism 32 of the integrated lifting and jacking overhead crane system 3 is used to move from the currently connected steel tower segment to the top of the installed steel tower segment, and then the next steel tower segment is lifted.

[0090] The self-climbing steps for a crane mounted on a twin-column cable tower are identical to those for a crane mounted on a single-column cable tower. Specifically, the sling 34 for lifting the steel tower segment is anchored to the top of the currently installed steel tower segment. Driven by the climbing cylinder 322, the bottom of the lifting column 321 of the continuous climbing mechanism 32 abuts against the sling 34 anchored to the top of the currently installed steel tower segment. The lifting column 321 and sling 34 are locked together by an anchor seat 346 and a plug-in pin located at the top of the sling 34. After the crane frame 31 climbs to the target height of the lifting column 321, driven by the climbing cylinder 322, the sliding support frame 2 is released from the tower column. The main truss 1 is lifted to the bottom of the crane frame 31 using the winch hoisting system 4. The sliding support frame 2 is then anchored to the currently installed tower segment via the tower wall-fixed hinged support 23.

[0091] It should be noted that the self-climbing of the twin-tower cable tower crane must be performed after the steel tower segments of both towers are symmetrically installed and welded. Furthermore, the self-climbing systems on both towers must operate synchronously to ensure a smooth ascent of the main truss 1. Furthermore, the self-climbing crane for twin-tower cable tower construction also includes a construction platform 5 attached to the main truss 1. The self-climbing system simultaneously elevates the main truss 1 and drives the construction platform 5 upward.

[0092] Furthermore, during the process of connecting the tower columns, the crane-jacking integrated overhead crane system 3 and the winch lifting system 4 are used to hoist temporary beams from bottom to top to different height positions of the tower columns to connect the two tower columns.

[0093] After both towers are constructed to the target height, the upper beam and the lower beam are hoisted in sequence from top to bottom to the specified height and connected to the two towers.

[0094] Specifically, after the tower column is constructed to the preset top height, an assembly bracket is installed at the tower base. The height of the assembly bracket is aligned with the installation height of the lower crossbeam. A self-climbing crane with an integrated lifting jacking system is used to hoist the crossbeam segments onto the assembly bracket to form the entire upper crossbeam. The self-climbing crane is then used to hoist the upper crossbeam as a whole to the upper crossbeam installation station and secure it there, completing the installation of the upper crossbeam.

[0095] Next, use an integrated self-climbing crane to lift the beam segments in three sections. First, lift the beam segments at both ends of the lower beam for installation, and finally lift the middle beam segment to close the lower beam, thereby completing the installation of the lower beam.

[0096] Finally, the temporary steel beams and the integrated self-climbing crane for lifting and jacking were dismantled in turn to complete the construction of the double-tower cable tower.

[0097] After the construction of the tower columns and beams of the double-tower cable tower is completed, the assembly brackets used to assemble the beams, the temporary beams used to connect the two tower columns, and the integrated self-climbing crane for lifting and jacking are removed from bottom to top.

[0098] When dismantling the self-climbing crane, the crane system 3 is placed on top of the tower column. The hoist system 4 lifts the main truss 1 and disconnects the sliding support frame 2 at the bottom of the main truss 1 from the tower column. The hoist system 4 then lowers the main truss 1 to the ground, where it is then disassembled using a crawler crane.

[0099] The tower crane is then used to dismantle the lifting and jacking integrated overhead crane system 3 located at the top of the tower column to complete the dismantling of the lifting and jacking integrated self-climbing crane of the present application.

[0100] The above description is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A double-tower column cable tower construction method, characterized in that: The following steps are involved: Install a self-climbing crane with integrated lifting and jacking between two adjacent towers along the transverse direction of the bridge that meet the construction height requirements; Use the hoisting and jacking integrated self-climbing crane to lift the steel tower segments and connect the tower columns; After both towers have been constructed to the target height, the upper and lower beams are hoisted in order from top to bottom to the designated heights and connected to the two towers; The temporary steel beams and the integrated self-climbing crane for lifting and jacking were dismantled in sequence to complete the construction of the twin-tower column and cable tower; The self-climbing crane with integrated lifting and jacking includes a main truss, a sliding support frame, an integrated lifting and jacking overhead crane system, a winch lifting system and a construction operation platform; the main truss is erected on two adjacent tower columns that have met the construction height along the transverse bridge direction; the sliding support frame is located below the main truss and is used to support the main truss, and two groups of sliding support frames are respectively provided corresponding to the two tower columns, and each group of sliding support frames includes a sliding support main frame body, a sliding step and a tower wall fixed articulated support, and the sliding step is provided between the sliding support main frame body and the main truss to drive the sliding support frame body to move along the length direction of the main truss, and the tower wall fixed articulated support is hinged to the sliding support body, and the tower wall fixed articulated support is connected to the tower by bolts. The side walls of the columns are connected; two sets of the lifting and jacking integrated overhead crane systems are provided on the main truss, and the lifting and jacking integrated overhead crane systems can move along the length direction of the main truss, and the lifting and jacking integrated overhead crane system includes a lifting crane frame, a continuous climbing mechanism, a lifting frame and a sling, the lifting crane frame is provided on the main truss and a driving mechanism for pushing the lifting crane frame to move along the length direction of the main truss is provided therebetween, the continuous climbing mechanism is provided on the lifting crane frame for lifting the lifting crane frame in a vertical direction, the lifting frame moves along the length direction of the lifting crane frame, and the winch lifting system is connected to the sling through the lifting frame for lifting the sling to lift the structure.

2. The double-column cable tower construction method according to claim 1, characterized in that: The continuous climbing mechanism of the lifting and jacking integrated overhead crane system includes a lifting column and a climbing cylinder. The lifting column is provided with a plurality of sockets arranged along its length direction. The climbing cylinder is arranged on the lifting crane frame. The protruding end of the piston rod of the climbing cylinder is provided with a plug-in pin that enters and exits the socket to push the lifting column to move in a direction perpendicular to the lifting crane frame.

3. The double-tower column cable tower construction method according to claim 2, characterized in that: The method of using a lifting and jacking integrated self-climbing crane to lift steel tower segments to connect tower columns includes the following steps: Use the crane-type integrated overhead crane system and winch lifting system to hoist the steel tower segment to the top of the installed tower column segment for height connection; The continuous climbing mechanism of the integrated crane system is used to move from the currently connected tower segment to the top of the installed tower segment, and then the next tower segment is hoisted. Repeat the above steps until the tower is constructed to the target height.

4. The double-column cable tower construction method according to claim 3, characterized in that: The continuous climbing mechanism of the lifting and jacking integrated overhead crane system is used to move from the current steel tower segment to the top of the installed steel tower segment, including the following steps: The lifting device for lifting the steel tower segment is anchored on the top of the currently installed steel tower segment; The lifting column of the continuous climbing mechanism is driven by the climbing cylinder, and the bottom of the lifting column abuts against the sling anchored on the top of the installed steel tower segment, and the lifting column and the sling are locked by the anchor seat and plug pin set on the top of the sling; After the crane frame climbs to the target height of the lifting column under the drive of the climbing cylinder, the sliding support frame and the tower column are released, and the main truss is lifted to the bottom of the crane frame by the winch lifting system, and then the sliding support frame is anchored to the currently installed tower column segment on the top through the tower wall fixed hinged support.

5. The double-column cable tower construction method according to claim 1, characterized in that: During the process of connecting the tower columns, the crane-jacking integrated overhead crane system and the winch lifting system are used to lift temporary beams from bottom to top to different height positions of the tower columns to connect the two tower columns.

6. The double-column cable tower construction method according to claim 1, characterized in that: After the tower column is constructed to the preset tower top height, an assembly bracket is set at the bottom of the tower. The height position of the assembly bracket is consistent with the installation position height of the lower crossbeam; The crossbeam segments are hoisted onto the assembly bracket using a lifting and jacking integrated self-climbing crane to assemble into an integral upper crossbeam, and then the upper crossbeam is hoisted as a whole to the upper crossbeam installation station by the lifting and jacking integrated self-climbing crane and installed and fixed.

7. The double-column cable tower construction method according to claim 6, characterized in that: When installing the lower crossbeam, use a self-climbing crane with an integrated lifting mechanism to lift the crossbeam segments in three sections. First, lift the crossbeam segments at both ends for installation, and finally lift the middle segment to close the lower crossbeam.

8. The double-column cable tower construction method according to claim 6, characterized in that: After the construction of the tower columns and beams is completed, the assembly brackets used to assemble the beams, the temporary beams used to connect the two tower columns, and the integrated self-climbing crane for lifting and jacking are removed from bottom to top.

9. The double-column cable tower construction method according to claim 8, characterized in that: When dismantling a self-climbing crane with integrated lifting and jacking, support its integrated lifting and jacking overhead crane system on the top of the completed tower column, release the connection between the sliding support frame at the bottom of its main truss and the tower column, use the winch lifting system to lower the main truss as a whole to the ground, and then use the tower crane to dismantle the integrated lifting and jacking overhead crane system at the top of the tower column.

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