CN115559209B - Construction method of double tower column cable tower - Google Patents
Construction method of double tower column cable towerInfo
- Publication number
- CN115559209B CN115559209B CN202211098041.XA CN202211098041A CN115559209B CN 115559209 B CN115559209 B CN 115559209B CN 202211098041 A CN202211098041 A CN 202211098041A CN 115559209 B CN115559209 B CN 115559209B
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- lifting
- tower
- crane
- climbing
- column
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
本申请提供一种双塔柱索塔施工方法，其包括以下步骤：在满足施工高度要求的沿横桥向的相邻两个塔柱之间安装起重顶升一体式自爬升起重机；利用起重顶升一体式自爬升起重机吊装钢塔节段进行塔柱的接高；待两个塔柱均施工到目标高度后，按照从上往下的顺序依次吊装上横梁和下横梁到指定高度位置并与两个塔柱连接；依次拆除临时钢横梁及起重顶升一体式自爬升起重机，完成双塔柱索塔的施工。
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
The application relates to the field of double-tower column cable tower construction, in particular to a double-tower column cable tower construction method.
Background
The cable-stayed bridge is also called as a stayed bridge, which is a bridge in which a main girder is directly pulled on a bridge tower by a plurality of stay ropes, and is a structural system formed by combining a bearing tower, a tension rope and a bearing beam body. It can be regarded as a multi-span elastic support continuous beam with guy cables instead of piers. The bending moment in the beam body can be reduced, the building height is reduced, the structural weight is reduced, and the materials are saved.
The cable-stayed bridge mainly comprises a cable tower, a main beam and a stay cable, and the conventional tower crane is used for hoisting bridge structures such as a steel tower section and a steel beam section of a tower column. Because the weight of the steel tower segment and the steel beam segment is larger, a large-tonnage tower crane is often required, the manufacturing cost is high, the horizontal thrust of the tower crane to a tower column during construction is large, the stress limit of a cable tower structure is easily exceeded, and the stress to a bridge is very unfavorable.
Disclosure of Invention
The application aims to provide a double-tower column cable tower construction method which is suitable for constructing double-tower column cable towers and does not need to use a wall-attached tower crane to hoist bridge structures, and mainly adopts a lifting and jacking integrated self-climbing crane, the crane not only can realize self-climbing, but also uses the tower column as a supporting structure of the crane to hoist bridge structures, ensures the stability of double-tower column cable tower construction, does not need to use a large-tonnage tower crane, and saves cost.
In order to achieve the above object, the present application provides the following technical solutions:
A double-tower column cable tower construction method comprises the following steps:
a lifting and jacking integrated self-climbing crane is arranged between two adjacent tower columns along the transverse bridge direction, which meets the requirement of construction height;
Lifting the steel tower section by using a lifting and jacking integrated self-climbing crane to connect the tower column;
after the two tower columns are constructed to the target height, sequentially hoisting the upper cross beam and the lower cross beam to the designated height position according to the sequence from top to bottom and connecting the two tower columns;
and sequentially dismantling the temporary steel cross beam and the lifting and jacking integrated self-climbing crane to finish the construction of the double-tower column cable tower.
The lifting and jacking integrated self-climbing crane comprises a main truss, a sliding support frame, a lifting and jacking integrated crown block system, a winch lifting system and a construction operation platform;
the main truss is erected on two adjacent tower columns meeting the construction height along the transverse bridge direction;
The sliding support frames are positioned below the main truss and used for supporting the main truss, two groups of sliding support frames are respectively arranged corresponding to two tower columns, each group of sliding support frames comprises a sliding support main frame body, sliding steps and a tower wall fixed hinged support, the sliding steps are arranged between the sliding support main frame body and the main truss so as 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 to the sliding support main body, and the tower wall fixed hinged support is connected with the side wall of the tower column through bolts;
The lifting and lifting integrated crane system comprises a lifting crane frame body, a continuous climbing mechanism, a lifting frame body and a lifting appliance, wherein the lifting crane frame body is arranged on the main truss, a driving mechanism used for pushing the lifting crane frame body to move along the length direction of the main truss is arranged between the lifting crane frame body and the main truss, the continuous climbing mechanism is arranged on the lifting crane frame body and used for lifting the lifting crane frame body along the vertical direction, the lifting crane frame body moves along the length direction of the lifting crane frame body, and the lifting crane lifting system is connected with the lifting appliance through the lifting crane frame body and used for lifting the lifting appliance to lift a structure.
The continuous climbing mechanism of the lifting and jacking integrated crown block system further comprises a lifting stand column and a climbing oil cylinder, wherein a plurality of jacks which are distributed along the length direction of the lifting stand column are arranged on the lifting stand column, the climbing oil cylinder is arranged on the lifting crown block body, and the extending end of a piston rod of the climbing oil cylinder is provided with a plug pin which enters and exits the jacks so as to push the lifting stand column to move along the direction perpendicular to the lifting crown block body.
The method is further provided that the step of lifting the steel tower section by using the lifting and jacking integrated self-climbing crane to carry out tower column height connection comprises the following steps:
Lifting the steel tower section to the top of the installed tower column section by using a lifting and jacking integrated overhead travelling crane system and a winch lifting system for height connection;
A continuous climbing mechanism of the lifting and jacking integrated crown block system is utilized to move from the currently connected steel tower section to the top of the installed steel tower section, and then the next steel tower section is hoisted;
and (5) circulating the steps until the tower column is constructed to the target height.
The continuous climbing mechanism of the lifting and jacking integrated crown block system is moved from the current steel tower section to the top of the installed steel tower section, and comprises the following steps of:
A lifting appliance for lifting the steel tower segment is anchored at the top of the currently installed steel tower segment;
Under the drive of a climbing oil cylinder, the bottom of the lifting column of the continuous climbing mechanism is abutted with a lifting appliance anchored at the top of the installed steel tower section, and the lifting column and the lifting appliance are locked through an anchoring seat and a plug pin arranged at the top of the lifting appliance;
After the crane frame body is driven by the climbing oil cylinder to climb to the target height of the lifting upright post, the fixation of the sliding support frame and the tower post is released, the main truss is lifted to the lower part of the crane frame body by using a winch lifting system, and then the sliding support frame is anchored with the tower post section installed at the current top by using a tower wall fixed hinged support.
The device is further provided with a hoisting and jacking integrated overhead travelling crane system and a winch lifting system which are used for hoisting the temporary cross beam to different height positions of the tower columns from bottom to top to connect the two tower columns in the process of connecting the tower columns.
The method comprises the steps of constructing a tower column to a preset tower top height, and arranging an assembly bracket at the tower bottom, wherein the height position of the assembly bracket is consistent with the height of a mounting station of a lower beam;
And hoisting the beam sections to the splicing brackets by using the lifting and jacking integrated self-climbing crane, splicing to form an integral upper beam, and integrally hoisting the upper beam to an upper beam installation station and installing and fixing by using the lifting and jacking integrated self-climbing crane.
When the lower beam is installed, the lifting and jacking integrated self-climbing crane is used for lifting the beam sections of the lower beam in three sections, the beam sections at the two ends are firstly lifted for installation, and finally the middle section is lifted for folding of the lower beam.
The self-climbing crane is further provided with an assembling bracket for assembling the beams, a temporary beam for connecting the two tower columns and a lifting and jacking integrated self-climbing crane which are sequentially disassembled from bottom to top after the construction of the tower columns and the beams is completed.
When the lifting and jacking integrated self-climbing crane is dismounted, the lifting and jacking integrated crane system is supported at the top of the constructed tower column, the connection between the sliding support frame at the bottom of the main truss and the tower column is released, the main truss is integrally lowered to the ground by utilizing the winch lifting system, and then the lifting and jacking integrated crane system positioned at the top of the tower column is dismounted by utilizing the tower crane.
Compared with the prior art, the scheme of the application has the following advantages:
1. In the double-cable tower construction method, the lifting and jacking integrated self-climbing crane not only can realize self-climbing, but also takes the tower column as a supporting structure of the crane, can be used for lifting a beam structure between the double tower columns besides lifting a steel tower section of the tower column, does not need to use a tower crane attached with the tower column to lift the crane and a bridge structure, has good structural stability and bearing capacity, ensures the stability of a lifting process, and is convenient to construct.
2. In the double-cable tower construction method, the construction of two tower columns of the cable tower is completed, then the cross beams are hoisted from the bottom of the tower in sequence from top to bottom, and in the process of constructing the tower columns, the temporary cross beams are arranged to replace the cross beams so as to ensure the structural stability in the construction process of the tower columns.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of one embodiment of a lift-jack integrated self-climbing crane of the present application;
FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;
FIG. 3 is a side view of one embodiment of a lift-jack integrated self-climbing crane of the present application;
FIG. 4 is a schematic structural view of a continuous climbing mechanism in the lifting and jacking integrated self-climbing crane of the application;
FIG. 5 is a schematic diagram of a connection structure between a continuous climbing mechanism and a double-anchor type lifting appliance in the lifting-and-jacking integrated self-climbing crane;
FIG. 6 is a schematic diagram of the structure of a spreader in the integrated crane lifting jack of the present application;
FIG. 7 is a top view of the construction of a spreader in the integrated crane lifting jack of the present application;
FIG. 8 is a schematic structural view of a construction operation platform in the lifting and jacking integrated self-climbing crane of the application;
Fig. 9 is a process flow diagram of a method for constructing a double-tower column cable tower by using the lifting and jacking integrated self-climbing crane.
In the figure, 1, a main truss, 2, a sliding support frame, 21, a sliding support main frame body, 22, a sliding walking track, 221, a sliding seat, 222, a sliding oil cylinder, 23, a tower wall fixed hinged support, 231, a fixed seat, 232, a connecting seat, 3, a lifting and lifting integrated crane system, 31, a lifting crane frame body, 32, a continuous lifting mechanism, 321, a lifting column, 322, a climbing oil cylinder, 33, a lifting frame body, 331, a roller, 332, a traversing oil cylinder, 34, a lifting appliance, 3411, an upper lifting beam, 3412, a lower lifting frame, 342, a lifting claw, 343, a movable pulley block, 344, a hydraulic oil cylinder, 345, a rotating structure, 3451, an inner ring, 3452, an outer ring, 3453, a motor, 346, an anchor seat, 35, a driving mechanism, 36, a lifting and leveling mechanism, 361, a leveling joint, 362, a double-head lifting oil cylinder, 4, a lifting machine lifting system, 41, a lifting machine, 42, a steel wire rope, 43, a rope receiving drum, 5, a construction operation platform, 51, a crane operation and maintenance platform, 52, an upper maintenance platform, 53, a lower maintenance platform, 54, a transverse maintenance platform, a welding platform, a transverse maintenance platform, a welding platform, and a maintenance platform, and a 57.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
Referring to fig. 1 to 8, for the construction of the existing single-tower column or double-tower column cable tower, the application provides a lifting and jacking integrated self-climbing crane which can realize self-climbing of the crane, does not need to be provided with large-scale lifting equipment, and can be suitable for cable tower construction in different geographic environments.
The lifting and jacking integrated self-climbing crane (hereinafter referred to as a crane) comprises a main truss 1, a sliding support frame 2, a lifting and jacking integrated crown block system 3 and a winch system 4, wherein the main truss 1 is erected at the top of a tower column meeting construction requirements, and the sliding support frame 2 is positioned below the main truss 1 and is used for being anchored with the tower column to support the main truss 1. The lifting and jacking integrated crown block system 3 is arranged above the main truss 1 and is used for lifting and jacking bridge structures and self-climbing of cranes. The lifting and jacking integrated crown block system 3 comprises a lifting crown block frame body 31, a continuous climbing mechanism 32, a lifting frame body 33 and a lifting appliance 34, wherein the lifting crown block frame body 31 can move along the length direction of the main truss 1 so as to transport and position a lifted bridge structure to the top of a tower column, the lifting frame body 33 is arranged on the lifting crown block frame body 31, and the lifting machine system 4 is connected with the lifting appliance 34 through the lifting frame body 33, so that the lifting appliance 34 is used for lifting the structure.
The lifting and jacking integrated self-climbing crane is mainly used for the construction of a cable tower, so that the hoisted bridge structure is a tower column section or a tower column cross beam.
Specifically, the main truss 1 adopts a two-piece truss structure, and comprises two trusses arranged in parallel and a middle parallel connection for connecting the two trusses, an opening is formed in at least one end side of the main truss 1 along the length direction of the main truss, and the opening of the main truss 1 is obliquely downwards arranged towards the center line of the main truss, so that the lifting and jacking integrated crown block system 3 can hoist bridge structures from the opening of the main truss 1 to the inside of the main truss 1 and transport the bridge structures to corresponding lowering stations. The top and the bottom of the main truss 1 are provided with rails (not labeled) for guiding the lifting and jacking integrated crown block system 3 above the main truss 1 and the sliding support frame 2 arranged at the bottom of the main truss 1 respectively.
The sliding support frame 2 arranged at the bottom of the main truss 1 is a main bearing structure for connecting the crane and the tower column, the sliding support frame 2 comprises a sliding support main frame body 21, a sliding walking 22 and a tower wall fixed hinged support 23, the length direction of the sliding support main frame body 21 is perpendicular to the length direction of the main truss 1, and the sliding walking 22 is arranged between the main truss 1 and the sliding support main frame body 21 so as to push the sliding support main frame body 21 to move along the length direction of the main truss 1 through the sliding walking 22. The sliding walking track 22 comprises two sliding seats 221 and sliding oil cylinders 222 arranged between the two sliding seats 221, the two sliding seats 221 are matched with the rails positioned at the bottom of the main truss 1, the two sliding seats 221 are provided with plug pins for being in plug-in fit with the main truss 1, in the two sliding seats 221, the sliding seat 221 close to the sliding support main frame 21 is connected with the sliding support main frame 21, and the sliding support frame 21 can move along the length direction of the main truss 1 through the matching of the two sliding seats 221 and the sliding oil cylinders 222.
The tower wall fixed hinged support 23 is hinged to one side, close to a tower column, of the sliding support main frame body 21, the tower wall fixed hinged support 23 comprises a fixed seat 231 and a connecting seat 232 which are hinged to each other, the fixed seat 231 is mounted on the sliding support main frame body 21, and the connecting seat 232 can be connected and fixed with a connecting piece pre-buried in the side wall of the tower column through a high-strength bolt.
Preferably, in this embodiment, the two sets of sliding support frames 2 are respectively disposed on two sides of the tower column, the main truss 1 is supported by two sets of sliding support frames 2, and each set of sliding steps 22 of the sliding support frames 2 is disposed in two sets corresponding to the two-sheet truss structure of the main truss 1, so that the sliding support frames 2 are pushed by the two sets of sliding steps 22 to approach or separate from the tower column along the length direction of the main truss 1. Meanwhile, the sliding support main frame body 21 is connected with the tower column through the four tower wall fixing hinged supports 23, so that the connection strength between the sliding support main frame body 21 and the tower column is ensured.
The main sliding support frame bodies 21 of the two groups of sliding support frames 2 on two sides of the tower column are driven by the sliding walking tracks 22 to approach the tower column, and the tower wall fixed hinged support 23 is anchored with the tower column, so that the whole load of the crane is transmitted to the tower column through the sliding support frames 2 and then through the tower wall fixed hinged support 23, and the crane is effectively supported.
The lifting and jacking integrated crown block system 3 can realize self-climbing of the crane and lifting of bridge structures, namely, the main truss 1 can climb to the top of an installed tower column section under the driving of the lifting and jacking integrated crown block system 3 so as to install the next tower column section. The sliding support frame 2 is lifted along with the lifting of the main truss 1, tower wall fixed hinged supports 23 of the sliding support frame 2 are anchored with the side wall of a tower column in the condition that the crane of the application lifts a bridge structure, and all the tower wall fixed hinged supports 23 and the tower column are released from constraint in the condition that the crane of the application lifts, and the sliding support frame 21 is driven by the sliding walking 22 to be far away from the tower column, so that the lifting operation of the main truss 1 is facilitated.
The lifting and jacking integrated crown block system 3 can move along the length direction of the main truss 1, the lifting and jacking integrated crown block system 3 comprises a lifting crown block frame body 31, a continuous climbing mechanism 32, a lifting frame body 33 and a lifting appliance 34, a driving mechanism 35 is arranged between the lifting crown block frame body 31 and the main truss 1, the driving mechanism 35 comprises a driving seat and a driving oil cylinder, the driving seat is matched with a track on the top of the main truss 1, a plug pin matched with the track in a plugging manner is arranged on the driving seat, and the driving oil cylinder is arranged between the driving seat and the lifting crown block frame body 31 and intermittently stretches out and draws back through the driving oil cylinder so as to push the lifting crown block frame body 31 to move along the length direction of the main truss 1.
Further, the crane frame 31 spans across the two trusses of the main truss 1, and two sets of driving mechanisms 35 are arranged between the crane frame 31 and the main truss 1 corresponding to the two trusses, so that the transverse movement stability of the crane frame 31 is improved.
The continuous climbing mechanism 32 is arranged in the crane frame body 31 and comprises a lifting stand 321 and a climbing cylinder 322, a perforation (not shown) is formed in the crane frame body 31, the lifting stand 321 penetrates through the crane frame body 31 from the perforation, a plurality of jacks (not shown) distributed along the length direction of the lifting stand 321 are formed in the lifting stand 321, the climbing cylinder 322 is arranged on the crane frame body 31, and a plug pin matched with the jack of the lifting stand 321 in a plug manner is arranged at the extending end of a piston rod of the climbing cylinder 322. And, at least two groups of climbing cylinders 322 are provided corresponding to each lifting stand 321, and the lifting stand 321 can be pushed to move along the length direction (vertical direction in the embodiment) by alternately extending and retracting the climbing cylinders 322 of different groups.
Preferably, four lifting columns 321 are provided in this embodiment, four through holes are correspondingly formed in the crane frame body 31, four connecting lines of the through holes are rectangular, the through holes are square holes, the lifting columns 321 are square columns, four groups of climbing cylinders 322 are arranged corresponding to four faces of the square columns, and four groups of climbing cylinders 322 are arranged along the peripheries of the through holes. In addition, four groups of climbing cylinders 322 are formed in pairs, and the telescopic operation of the climbing cylinders 322 of two groups of the same group is synchronized and are oppositely arranged corresponding to the opposite surfaces of the lifting upright 321. In addition, it should be noted that each set of climbing cylinders 322 at least includes one cylinder to push the lifting upright 321, and the greater the number of cylinders, the higher the supporting capability of the lifting upright 321. Therefore, in this embodiment, three cylinders are disposed side by side in each set of climbing cylinders 322 to extend and retract synchronously, and an installation seat (not shown) is disposed at an end of the extending end of the piston rod of the three cylinders, and a plug pin that is in plug-in fit with the lifting upright 321 is fixed on the installation seat.
Further, a lifting parallel mechanism 36 is further disposed between two adjacent lifting upright posts 321, the lifting parallel mechanism 36 includes a parallel 361 and a double-head lifting cylinder 362, two ends of the parallel 361 are respectively provided with the double-head lifting cylinder 362, the double-head lifting cylinder 362 has two telescopic piston rods, and the extending ends of the two piston rods are respectively provided with a plug pin capable of being in plug fit with the lifting upright posts 321. The lifting parallel connection 361 is connected with two adjacent lifting upright posts 321, so that the lifting synchronization of the lifting upright posts 321 can be ensured.
The lifting frame body 33 is respectively provided at two ends of the lifting crane frame body 31, and the lifting frame body 33 can move along the length direction relative to the lifting crane frame body 31. Specifically, the crane frame 31 is provided with a traversing cylinder 332 that stretches out and draws back along the length direction thereof, a piston rod extending end of the traversing cylinder 332 is connected with the crane frame 33, meanwhile, two ends of the crane frame 31 are also provided with guide rails (not shown) that extend along the length direction thereof, and the crane frame 33 is provided with guide grooves (not shown) that are matched with the guide rails, so that the position of the crane frame 33 on the crane frame 31 is adjusted by the traversing cylinder 332.
The roller 331 is arranged on the lifting frame body 33, the winch 41 is mainly matched with the steel wire rope 42 to carry out lifting operation, the steel wire rope 42 of the winch lifting system 4 passes through the roller 331 on the lifting frame body 33 and then is connected with the lifting tool 34, namely the lifting frame body 33 plays a role in guiding the steel wire rope 42, and the position of the lifting frame body 33 can be adjusted through the transverse moving oil cylinder 332 to adjust the position of the lifting frame body 33, so that the lifting position of the steel wire rope 42 can be adjusted to adapt to the connection with lifting tools 34 with different specifications. The lifting appliance 34 comprises a lifting frame and a lifting claw 342, the lifting claw 342 is arranged below the lifting frame and used for being connected with a bridge structure to be lifted, and the lifting frame is provided with a movable pulley block 343 which is used for being connected with the steel wire rope 42 passing through the lifting frame body 33. Two groups of movable pulley blocks 343 are arranged at two ends of the lifting appliance 34 and correspond to the rollers 331 of the two lifting frame bodies 33 on the lifting crane frame body 31 respectively, so the winch lifting system 4 is provided with two groups of steel wire ropes 42 to be connected with the movable pulley blocks 343 at two ends of the lifting appliance through the rollers 331 of the two lifting frame bodies 33, namely the steel wire ropes 42 are connected with the movable pulley blocks 343 at two ends of the lifting appliance to lift the lifting appliance, the lifting stability is high, and the construction safety of lifting is improved.
The hanger comprises an upper hanging beam 3411 and a lower hanging beam 3412, the movable pulley blocks 343 are arranged at two ends of the upper hanging beam 3411, and the hanging claws 342 are arranged at the bottom side of the lower hanging beam 3412. The lower hanger 3412 is an H-shaped frame, and the hanger 34 is provided with one hanger each at four corner ends of the lower hanger 3412, and each of the hanging claws 342 is a four-claw hanging claw. In addition, a hydraulic cylinder 344 is further disposed on the lower hanger 3412 corresponding to each lifting claw 342, and the lifting claws 342 are pushed to slide on the lower hanger 3412 by the hydraulic cylinder 344, so that the positions of the lifting claws 342 are changed according to the positions of lifting points of the bridge structures to be lifted, that is, the lifting tool 34 is an adjustable lifting tool 34, so as to adapt to the lifting operations of the bridge structures with different specifications.
The upper hanging beam 3411 is arranged above the middle connecting beam of the lower hanging frame 3412, a rotating structure 345 is arranged between the upper hanging beam 3411 and the lower hanging frame 3412, the rotating structure 345 comprises an inner ring 3451 and an outer ring 3452 which are coaxially arranged, the inner ring 3451 and the outer ring 3452 can rotate relatively, the outer ring 3452 is bolted with the upper hanging beam 3411, the inner ring 3451 is bolted with the lower hanging frame 3412, the upper hanging beam 3411 is provided with a motor 3453, the inner ring 3453 drives the inner ring 3451 to rotate, the inner ring 3451 is provided with whole internal teeth, an output shaft of the motor 3453 is provided with gears meshed with the internal teeth, the upper hanging beam 3411 and the lower hanging frame 3412 are driven to rotate relatively through gear meshing when the motor 3453 rotates, the motor 3453 has a self-locking function, and the relative positions of the upper hanging beam 3411 and the lower hanging frame 3412 are fixed when the motor 3453 stops rotating. The hanger provided by the application is provided with the rotary structure 345 between the upper hanging beam 3411 and the lower hanging device 34, and can be suitable for the condition that the tower column section gradually widens along the forward bridge direction, the short side is positioned along the forward bridge direction, the long side is positioned along the transverse bridge direction during hanging, and the hanger is rotated by 90 degrees for installation after being lifted to the installation position, otherwise, an active transverse strut and a temporary transverse beam between cable towers are required to be installed to the outer side of the tower column transverse bridge, so that the tower column and the transverse beam are prevented from being interfered.
The winch lifting system 4 comprises a winch 41, a steel wire rope 42 and a rope collecting drum 43, and the winch 41 is arranged on the crane frame body 31 and moves along with the crane frame body in the embodiment due to the limited space arrangement position of the winch lifting system, and the rope collecting drum 43 is arranged at the bottom of the tower column. Preferably, the present application preferably employs a friction type hoist 41, and the wire rope 42 of the friction type hoist 41 is passed only during operation without being wound around the hoist 41, thereby separating the hoist 41 from the rope reel 43. One end of the steel wire rope 42 is wound at the rope winding drum 43, the other end passes through the winch 41, then passes through the roller 331 on the lifting frame body 33, and is connected with the movable pulley block 343 on the lifting tool 34, and the lifting tool 34 is pulled to lift by the friction between the winch 41 and the steel wire rope 42.
In the present embodiment, the lifting capacity of each set of winch systems 4 is 300 tons, and the diameter of the steel wire rope 42 is equal toModel preferenceThe breaking force of the steel wire rope 42 is 99.4 tons, and the lifting speed is 6m/min under rated load. The total length of the steel wire rope 42 is 3000m multiplied by 4, the self weight of the single friction type winding machine 41 is 30 tons, and the self weight of the single rope collecting machine is 10 tons.
In addition, after the current tower segment is lifted, the crane of the application can use the continuous climbing mechanism 32 to climb to the top of the current tower segment, at this time, the consolidation of the lifting appliance 34 and the top of the tower segment is maintained, and the climbing cylinder 322 is used to lower the lifting upright 321 so as to anchor the bottom of the lifting upright to the top of the lifting appliance 34. The lifting appliance 34 is a double-anchor lifting appliance 34, four groups of anchor seats 346 are arranged at positions corresponding to the four lifting upright posts 321, and each anchor seat 346 is provided with a plug pin, so that when the bottom of the lifting upright post 321 is propped against the lifting appliance 34, the plug pins can be inserted into insertion holes at the bottom of the lifting upright post 321 to realize the anchoring between the lifting upright post 321 and the lifting appliance 34 beam. And, each group of the anchor seats 346 is provided with at least two anchor seats 346 corresponding to each lifting stand 321, and the connection strength between the lifting stand 321 and the lifting appliance 34 is ensured by anchoring at least two points of the lifting stand 321. In the present embodiment, each set of the anchor seats 346 is provided with four anchor seats 346 to anchor four sides of each lifting stand 321 in one-to-one correspondence, so that the anchoring stability between the lifting stand 321 and the spreader 34 is high.
Then, the crane frame body 31 is lifted along the lifting stand 321 by the telescopic operation of the lifting cylinder 322 on the crane frame body 31, and the crane frame body can be stopped after the crane is lifted in place. The main truss 1 can climb along with the climbing of the crane frame body 31, before the main truss 1 climbs along with the crane frame body 31, the anchoring between the sliding support frame 2 and the tower column should be released, and the sliding support frame 2 slides out a distance to be completely separated from the tower column, so that the main truss 1 and the tower column are relatively free, and at this time, the load of the crane is transmitted to the top of the tower column through the lifting upright 321 and the lifting appliance 34 to carry out bearing. Or before the crane frame 31 climbs, the limitation before the crane frame 31 and the main truss 1 is released, after the crane frame 31 climbs in place, the limitation of the steel wire rope 42 and the lifting tool 34 is released, a temporary lifting tool 34 is arranged at the end part of the steel wire rope 42 for lifting, the lifting frame 33 at the two ends of the crane frame 31 is adjusted to adjust the position of the temporary lifting tool 34 to be connected with the main truss 1, at the moment, the connection between the sliding support frame 2 and the tower column is released, the main truss 1 and the sliding support frame 2 are lifted to the lower position of the crane frame 31 by the temporary lifting tool 34, the crane frame 31 is connected with the main truss 1, and the sliding support frame 2 is anchored with the currently-top installed tower column section, so that the self-climbing of the crane is completed.
The self-climbing of the crane mainly depends on the cooperation of the climbing oil cylinder 322 and the plug pin, a multipoint synchronous control system is adopted to ensure the consistency and the synchronism of the actions of all the lifting oil cylinders, and a mature load-sensitive electrohydraulic proportional multi-way valve is adopted in the aspect of the synchronous control system on the design of a hydraulic system, so that the point-to-point independent control of all the lifting oil cylinders can be realized. In the lifting process, the electric control system can acquire the position of a piston rod of the oil cylinder according to a displacement sensor arranged on the oil cylinder, correspondingly adjusts the oil supply quantity of each proportional valve in real time according to different positions of the oil cylinder, and realizes synchronous control of all the lifting oil cylinders in the whole process by adopting a PID algorithm (namely a control algorithm combining three links of proportion, integral and derivative).
In conclusion, the lifting and jacking integrated self-climbing crane integrates lifting and self-climbing, does not need to additionally arrange large-scale lifting equipment, solves the problems of high manufacturing cost and low progress of the existing tower crane lifting structure, and lifts the crane to the lifting position of the next section through a continuous lifting structure after the construction of a single section of structure is completed, thereby having simple technological operation, saving construction time and improving construction efficiency.
In addition, the lifting and jacking integrated self-climbing crane is not only suitable for the construction of the cable tower with a single-tower column structure, but also can meet the construction of a double-tower column cable tower.
Specifically, when the cable tower of single tower column structure is constructed, the main truss 1 is erected at the top tower column section where the tower column meets the construction height requirement, and the lifting operation of the tower column section can be completed by arranging a set of lifting and jacking integrated overhead travelling crane system 3 on the main truss 1.
Therefore, the use method of the lifting and jacking integrated self-climbing crane comprises the following steps:
s001, arranging a lifting and jacking integrated self-climbing crane at the top of a tower column meeting the requirement of construction height. The main truss 1 of the lifting and jacking integrated self-climbing crane is erected at the top of a single tower column along a transverse bridge, two groups of sliding support frames 2 are arranged along the transverse bridge direction and are arranged on two sides of the tower column, and the main truss 1 is provided with a set of lifting and jacking integrated crown block system 3 and a winch lifting system 4.
And S002, lifting the steel tower section from one end of the main truss 1 in the length direction by utilizing the lifting and jacking integrated overhead travelling crane system 3 and the winch lifting system 4 to be installed above the installed tower column section.
The main truss 1 is located its length direction's one end and sets up the slope opening to make things convenient for jack-up integrated overhead traveling crane system 3 and hoist and mount system 4 hoist and mount steel tower section to enter into main truss 1 and transport, the position of jack-up integrated overhead traveling crane system 3 on main truss 1 is controllable, thereby ensures the steel tower section of hoist and mount and the accurate counterpoint of tower post that has been installed, ensures the installation accuracy of tower post.
During the lifting of the steel tower segment by the lifting and jacking integrated crown block system 3 and the winch lifting system 4, the sliding support frame 2 below the main truss 1 is anchored with the tower column, so that the main truss 1 is ensured to have enough supporting capacity to realize the lifting operation of the steel tower segment.
And S003, after the installation of the hoisted steel tower section is finished, the lifting and jacking integrated self-climbing crane is moved to the top of the currently installed steel tower section by utilizing the lifting and jacking integrated crown block system 3.
The known lifting and jacking integrated crown block system comprises a lifting crown block frame body 31, a continuous climbing mechanism 32, a lifting frame body 33 and a lifting appliance 34, wherein the continuous climbing mechanism 32 comprises a lifting stand 321 and a climbing cylinder 322. When the crane of the application climbs, the climbing cylinder 322 moves the lifting upright post 321 to be abutted with the lifting appliance 34 anchored at the top of the tower column below the lifting upright post, the bottom of the lifting upright post 321 is in anchoring connection with the lifting appliance 34 through the plug pin of the anchoring seat 346, and after the lifting upright post 321, the lifting appliance 34 and the top of the tower column are anchored, the climbing cylinder 322 climbs to the top of the lifting upright post 321 along the vertical direction with the crane frame body 31. The main truss 1 can climb along with the climbing of the crane frame body 31, and in the climbing process, the sliding support frame 2 at the bottom of the main truss 1 is separated from the tower column, or the crane frame body 31 and the main truss 1 can be separated first, after the crane frame body 31 climbs in place, the main truss 1 is lifted to the lower part of the crane frame body 31 by the crane frame bodies 33 at the two ends of the crane frame body 31 and the temporary lifting tool 34. It should be noted that when the main truss 1 is lifted, 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 with the top of the current tower column, so that the self-climbing of the lifting and jacking integrated self-climbing crane is completed.
And (S002) and S003 are circulated, namely, the tower column is connected up through the circulating operation of the climbing operation of the lifting steel tower section and the lifting and jacking integrated crown block system 3 until the construction of the tower column is completed.
When the cable tower for the double-tower column structure is constructed, besides the construction of connecting the single tower column, the beam between the two tower columns is also required to be constructed. When the cable tower with the double-tower column structure is constructed by utilizing the lifting and jacking integrated self-climbing crane, the main truss 1 of the lifting and jacking integrated self-climbing crane is required to be erected on two adjacent tower columns meeting the requirement of the construction height along the transverse bridge direction, meanwhile, two groups of the sliding support frames 2 are respectively arranged corresponding to the two tower columns, and each group of the sliding support frames 2 is respectively arranged on two sides of the corresponding tower column, so that the two ends of the main truss 1 can be effectively supported.
In addition, when constructing the cable tower of two tower post structures, because cable tower structure is more complicated than the cable tower structure of single tower post, can be through setting up construction operation platform 5 in main truss 1 in order to make things convenient for the workman to construct. The construction operation platform 5 comprises a crown block operation 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 repairing platform 56, wherein the upper maintenance platform 52 is arranged on the top side of the main truss 1, the crown block operation maintenance platform 51 is arranged on the crane frame body 31, an upper and lower channel 57 is arranged between the crown block operation platform and the upper maintenance platform 52, the lower maintenance platform 53 is arranged on the lower side of the main truss 1, an upper and lower channel 57 is also arranged between the upper maintenance platform 52 and the lower maintenance platform 53, the upper and lower channel 57 is arranged in a diagonal bracing arrangement attached to the main truss 1 so as to ensure the structural strength and stability of the upper and lower channel 57, the transverse sliding welding platform 54 is arranged along the transverse bridge direction, the longitudinal welding platform 55 is arranged along the bridge direction, and the transverse sliding welding platform 54 and the longitudinal sliding welding platform are positioned at the top of a tower column so that after the tower column section to be hoisted to the top of the installed tower column section, and the welding operation between the two sections is performed. The repairing platform 56 is correspondingly arranged at the position of the sliding support frame 2 and can be used for repairing the structure of the sliding support frame 2, and an upper channel 57 and a lower channel 57 are arranged between the repairing platform 56 and the longitudinal welding platform 55. According to the application, the upper and lower channels 57 are arranged among a plurality of platforms with different height positions for communication, and the edge protection adopts the high protection guardrail with the height of 1.5m, so that workers can conveniently reach each construction operation platform 5 through the upper and lower channels 57, and the operations at different positions can be completed.
Therefore, when the crane is used for cable tower construction of a double-tower column structure, the construction operation platform 5 is arranged on the main truss 1, and the construction operation platform 5 and the main truss 1 are combined, so that the construction operation platform 5 can lift together along with the main truss 1 under the drive of the continuous climbing mechanism 32, and a conventional annular operation platform is not required to be additionally arranged.
In addition, for the cable tower of the double-tower column structure, the main truss 1 is provided with two sets of lifting and jacking integrated crown block systems 3, so that synchronous construction of two tower columns can be performed, and the construction efficiency is further improved.
Then please refer to fig. 9, the construction method of the double column cable tower includes the following steps:
firstly, a lifting and jacking integrated self-climbing crane is installed between two adjacent tower columns along the transverse bridge direction, which meet the requirements of construction height.
The lifting and jacking integrated self-climbing crane comprises a main truss 1, a sliding support frame 2, a lifting and jacking integrated crown block system 3, a winch lifting system 4 and a construction operation platform 5, wherein the main truss 1 is erected between two adjacent tower columns meeting the construction height along a transverse bridge direction, the sliding support frame 2 is positioned below the main truss 1 and respectively corresponds to the two tower columns to be arranged in two groups, and the sliding support frame 2 is anchored with a top tower column section to achieve the effect of supporting the main truss 1 and an upper structure thereof.
The lifting and lifting integrated crane system 3 is arranged on the main truss 1, the lifting and lifting integrated crane system 3 can move along the length direction of the main truss 1, the lifting and lifting integrated crane system 3 comprises a lifting and lifting frame body 31, a continuous climbing mechanism 32, a lifting and lifting frame body 33 and a lifting appliance 34, the lifting and lifting frame body 31 is arranged on the main truss 1, a driving mechanism 35 for pushing the lifting and lifting frame body 31 to move along the length direction of the main truss 1 is arranged between the lifting and lifting frame body 31, the continuous climbing mechanism 32 is arranged on the lifting and lifting frame body 31 to lift the lifting and lifting frame body 31 along the vertical direction, the lifting and lifting frame body 33 is connected with the lifting appliance 34 through the lifting and lifting frame body 33 to be used for lifting and lifting the lifting appliance 34 to lift the steel tower section.
And lifting the steel tower section by using a lifting and jacking integrated self-climbing crane to connect the tower column.
Specifically, the steel tower segment is hoisted to the top of the installed tower column segment by using the lifting and jacking integrated crown block system 3 and the winch lifting system 4 for height connection, after the installation of the current top tower column segment is completed, the continuous climbing mechanism 32 of the lifting and jacking integrated crown block system 3 is moved from the current connected steel tower segment to the top of the installed steel tower segment, and then the next steel tower segment is hoisted.
The self-climbing step of the crane on the double-tower column cable tower is the same as that of the crane installed on the single-tower column cable tower, namely, the lifting appliance 34 for lifting the steel tower segment is anchored at the top of the currently installed steel tower segment, the lifting upright 321 of the continuous climbing mechanism 32 is driven by the climbing cylinder 322, the bottom of the lifting upright 321 is abutted with the lifting appliance 34 anchored at the top of the installed steel tower segment, and the lifting upright 321 and the lifting appliance 34 are locked through the anchoring seat 346 and the plug pin arranged at the top of the lifting appliance 34. After the crane frame 31 is driven by the climbing cylinder 322 to climb to the target height of the lifting stand 321, the fixation of the sliding support frame 2 and the tower column is released, the main truss 1 is lifted to the lower part of the crane frame 31 by using the winch lifting system 4, and then the sliding support frame 2 and the tower column section installed at the current top are anchored by the tower wall fixed hinged support 23.
It should be noted that the self-climbing of the crane of the double column cable tower needs to be performed after the symmetrical installation and welding of the steel tower sections of the two towers, and the self-climbing systems on the two towers also need to operate synchronously to ensure the straight lifting of the main truss 1. Meanwhile, the lifting and jacking integrated self-climbing crane for double-tower column cable tower construction further comprises a construction operation platform 5, wherein the construction operation platform 5 is attached to the main truss 1, and the self-climbing system drives the construction operation platform 5 to climb while lifting the main truss 1.
In addition, in the process of connecting the tower columns, the temporary cross beam is hoisted to different height positions of the tower columns from bottom to top by utilizing the hoisting and jacking integrated crown block system 3 and the hoist and crane lifting system 4 to connect the two tower columns.
After the two tower columns are constructed to the target height, the upper cross beam and the lower cross beam are sequentially hoisted to the designated height position in sequence from top to bottom and are connected with the two tower columns.
Specifically, after the tower column is constructed to a preset tower top height, an assembly support is arranged at the tower bottom, and the height position of the assembly support is consistent with the height of the installation station of the lower beam. And hoisting the beam sections to the splicing brackets by using the lifting and jacking integrated self-climbing crane, splicing to form an integral upper beam, and integrally hoisting the upper beam to an upper beam installation station by using the lifting and jacking integrated self-climbing crane and installing and fixing the upper beam to finish the installation construction of the upper beam.
And then, hoisting beam sections of the self-climbing crane by using three sections by using a lifting and jacking integrated self-climbing crane, hoisting beam sections at two ends of the lower beam for installation, hoisting the middle beam section for folding the lower beam, and then completing the installation construction of the lower beam.
And finally, sequentially dismantling the temporary steel beam and the lifting and jacking integrated self-climbing crane to finish the construction of the double-tower steel cable tower.
After the construction of the tower columns and the cross beams of the double-tower column cable tower is completed, the splicing support for splicing the cross beams, the temporary cross beams for connecting the two tower columns and the lifting and jacking integrated self-climbing crane are sequentially removed from bottom to top.
When the lifting and jacking integrated self-climbing crane is dismantled, the lifting and jacking integrated crown block system 3 is manufactured at the top of the tower column, the winch lifting system 4 lifts the main truss 1, and the connection between the sliding support frame 2 at the bottom of the main truss 1 and the tower column is released. The main girder 1 is then integrally lowered to the ground by means of the hoist hoisting system 4, and the main girder 1 is then disassembled by means of crawler cranes.
And then dismantling the lifting and jacking integrated crown block system 3 positioned at the top of the tower column by using the tower crane to finish the dismantling of the lifting and jacking integrated self-climbing crane.
The foregoing is only a partial embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
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| CN202000646U (en) * | 2011-01-30 | 2011-10-05 | 中建三局建设工程股份有限公司 | Self-lifting construction platform integrating vertical transportation device and mould frame |
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