WO2022048317A1 - Steel tower lifting and mounting method - Google Patents

Abstract

A steel tower lifting and mounting method, which comprises a mounting method for an inclined tower section, a mounting method for a straight tower section, a mounting method for a variable-section tower section, a mounting method for a steel cross beam and other sub-methods. The sub-methods are all achieved by means of a self-lifting type lifting formwork, such that the problems of high construction costs and low progress caused by an existing tower crane in lifting structures can be solved; and after the construction of a single-section structure is completed, the single-section structure is lifted to a hoisting position of the next section by means of a lifting system of the formwork, the operation is repeated, and the process operation is simple, thereby saving on the construction time, and improving the construction efficiency.

Description

Steel tower lifting installation method technical field

The present application relates to the technical field of bridge construction, and in particular, to a method for lifting and installing a steel tower.

Background technique

Cable-stayed bridge, also known as cable-stayed bridge, is a kind of bridge in which the main beam is directly pulled on the bridge tower with many cables. structural system. It can be regarded as a multi-span elastic supporting continuous beam with stay cables instead of buttresses. It can reduce the bending moment in the beam body, reduce the building height, reduce the structural weight and save materials. Cable-stayed bridges are mainly composed of pylons, main beams and stay cables.

Among them, the commonly used cable tower forms are arranged along the bridge horizontally, such as single column, double column, portal, inclined leg portal, inverted V, inverted Y, A, etc.) is the key link of construction progress and construction safety. The hoisting equipment commonly used in the construction of cable towers such as floor gantry cranes, but the height of the hoisting body of floor gantry cranes should not exceed 30 meters, otherwise the stability of the hoisting body will be reduced, the hoisting weight will drop, the structure of the hoisting body will consume a lot of steel, Poor generality and so on.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a method for lifting and installing a steel tower with fast construction speed, time saving and low construction cost.

In order to achieve the above purpose, the application provides the following technical solutions:

A method for lifting and installing a steel tower, comprising the following sub-methods:

The installation method of the inclined tower section: install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements, and use the self-elevating lifting formwork to hoist the continuous steel tower section from the side of the steel tower to the installed steel tower section. Install the top of the steel tower segment for installation. After the continued steel tower segment is installed in place, the self-elevating formwork uses its self-climbing system to climb to the next station for the next continuous steel tower segment. installation, the continuous steel tower segment is installed according to the line shape of the inclined tower segment, and the hoisting frame body of the self-elevating formwork is kept horizontal;

The installation method of the straight tower section: install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements, and use the self-elevating lifting formwork to hoist the continuous steel tower section from the side of the steel tower to the installed steel tower section. Install the top of the steel tower segment for installation. After the continuous steel tower segment is installed in place, the self-elevating formwork uses its self-climbing system to vertically climb to the next station for the next continuous steel tower. segment to install;

The installation method of the variable section tower section: install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements, and adjust the current climbing round according to the preset curvature/angle change value of the variable section tower section. The deflection angle of the track of the lifting formwork, the self-elevating formwork is used to hoist the continuous steel tower segment from one side of the steel tower to the top of the installed steel tower segment for installation, and the continuous steel tower is installed. After the segment is installed in place, adjust the deflection angle of the track of the self-elevating formwork in subsequent climbing rounds again, and the self-elevating formwork climbs to the next station to install the next continuous steel tower segment, Until the installation process of the variable-section tower section is completed;

The installation method of the steel beam: install the self-elevating lifting formwork on the top of the installed steel tower segments that meet the height requirements of the two adjacent steel towers along the transverse bridge direction, and use the self-elevating lifting formwork to hoist the whole. The installation position of the lower beam from the beam to the tower column is to assemble a temporary support platform higher than the top surface of the lower beam at the bottom of the tower, assemble the middle beam on the temporary support platform, and then assemble the beam on the top of the middle beam. The lifting formwork is used to hoist the upper beam to the temporary position of the tower column as a whole, and the temporary position is above the installation position of the middle beam, and the self-elevating lifting formwork is used to hoist the middle beam to the middle beam of the tower as a whole. In the installation position, the self-elevating formwork is used to hoist the upper beam from the temporary position as a whole to the installation position of the upper beam of the tower column.

Compared with the prior art, the solution of the present application has the following advantages:

1. In the steel tower lifting method of the present application, the self-elevating lifting formwork attached to the surface side wall of the structure is utilized to carry out the lifting construction of the steel tower, which solves the existing problems of high cost and slow progress of hoisting structures by using a tower crane. , After the construction of a single-section structure is completed, it is lifted to the hoisting position of the next section through the hoisting system that comes with the formwork, and circulates in sequence, the process operation is simple, the construction time is saved, and the construction efficiency is improved.

2. In the steel tower lifting method of the present application, the self-elevating formwork can realize the lifting construction of the steel tower segment according to different tower column positions, and has wide applicability. Among them, in the construction process of the inclined tower section, by setting the swing support between the climbing frame and the lifting truss, the levelness of the lifting truss can be ensured during the climbing process, so as to ensure that the self-elevating climbing formwork lifts the steel. The stability of the tower segment; and at the curvature change point at the connection between the inclined tower segment and the straight tower segment, the track deflection angle of the self-elevating lifting formwork can be adjusted many times, so that a large curvature value can be divided into multiple The small curvature value can smoothly pass the curvature change point of the inclined tower section and the straight tower column when the clearance of the climbing assembly and the track allows, which is easy to operate and has high safety and stability; finally, the self-elevating formwork can be used to lift the steel The steel beams are assembled at high altitudes to ground and low-altitude ones. The assembly of the steel beams can be carried out simultaneously with the hoisting of the steel tower segments, which saves the construction period and improves the construction efficiency. In addition, most of the welding work of the steel beam is carried out on the ground and at low altitude, which reduces the high-altitude operation, reduces the safety risk, and at the same time avoids the installation and dismantling risk of the temporary support.

Additional aspects and advantages of the present application will be set forth in part in the following description, which will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation of the hydraulic self-elevating integrated cable-stayed bridge lifting formwork of the application;

Fig. 2 is the enlarged schematic diagram of A part of Fig. 1;

Fig. 3 is the structural schematic diagram of the hydraulic self-elevating integrated cable-stayed bridge lifting formwork of the application for indicating the hoisting installation position;

Fig. 4 is the enlarged schematic diagram of B part of Fig. 3;

Fig. 5 is the enlarged schematic diagram of C part of Fig. 3;

6 is a schematic structural diagram of the self-climbing system in the lifting formwork of the hydraulic self-elevating integrated cable-stayed bridge of the application;

7 is a side view of the self-climbing system in the lifting formwork of the hydraulic self-elevating integrated cable-stayed bridge of the application;

8 is a schematic diagram of the cooperation relationship between the climbing components and the rails in the lifting formwork of the hydraulic self-elevating integrated cable-stayed bridge of the application;

9 is a schematic diagram of a climbing frame in the lifting formwork of the hydraulic self-elevating integrated cable-stayed bridge of the application;

Figure 10 is a schematic diagram of the lifting truss of the hydraulic self-elevating integrated cable-stayed bridge lifting formwork of the application;

FIG. 11 is a schematic structural diagram of an embodiment of the bridge deck crane of the present application.

In the figure, 1, self-climbing system; 11, anchoring seat; 12, track; 121, upper load-bearing shear block; 122, lower load-bearing shear block; 123, anti-hook groove; 124, plug hole; 125, anti-lock Falling shear block; 130, anti-hook part; 1301, slider; 1302, connecting arm; 131, climbing frame jacking seat; 1311, single-axis hydraulic plug mechanism; 1312, anti-fall lock tongue; 1313, plugging and unplugging Pin hole; 132, oil cylinder block; 1321, double-axis hydraulic plugging pin mechanism; 1322, plugging pin hole; 133, climbing frame guide seat; 1331, plugging pin hole; 2, lifting system; 21, climbing frame; 211, horizontal constant reaction force mechanism; 22, hoisting truss; 221, first reverse hook track; 222, truss reverse hook track; 23, crane crane; 231, lower sliding beam; 2311, second reverse hook track 232, upper sliding beam; 241, swinging support; 2411, connecting part of climbing frame; 2412, connecting part of front end of truss; 242, sliding swing bearing; 2421, connecting part of climbing frame; 2422, connecting part of tail end of truss ;3. Hydraulic lifting system; 41. Jacking oil cylinder; 42. The first traveling jack; 43. The second traveling jack; 10000, Hydraulic self-elevating integrated cable-stayed bridge lifting formwork; , crane truss; 20002, crane crane; 20003, crane jack mechanism; 20004, spreader; 20005, track beam; 20006, slipper; 20007, walking cylinder; 20008, front support cylinder; seat; 20010, rear support cylinder.

detailed description

In order to solve the problems of high cost and slow progress of existing tower cranes for hoisting steel towers, steel beams and other structures, please refer to Figures 1 to 10, the application discloses a hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 , which can effectively realize the rapid construction of the steel tower column of the cable-stayed bridge, which is conducive to the closed construction and safety management, improves the construction efficiency and reduces the construction cost.

1 and 3, the hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 includes a self-climbing system 1, a hoisting system 2 and a hydraulic system, wherein the hoisting system 2 and the self-climbing system The system 1 is connected to realize the climbing of the hoisting system 2 along the height direction of the structure through the self-climbing system 1. The hydraulic system includes a hydraulic lifting system 3 and a self-climbing hydraulic system, and the hydraulic lifting system 3 is provided. On the top of the lifting system 2, and the hydraulic lifting system 3 can move laterally or longitudinally relative to the lifting system 2, so as to hoist the connecting structure to the construction position on the top of the installed structure for installation, so The self-climbing system 1 is mainly responsible for the lifting and climbing work of the whole machine, and controls the movement of the hydraulic lifting system 3 relative to the hoisting system 2 . In addition, the hydraulic system of the present application adopts an open system, that is, after the hydraulic pump sucks the hydraulic oil from the oil tank, it is output to each actuator, and the return oil of each actuator is directly returned to the oil tank, which has a simple structure and good heat dissipation and oil filtering conditions.

6 and 7 , the self-climbing system 1 includes an anchoring seat 11 embedded in the surface of a structure, a track 12 attached to the anchoring seat 11 and a climbing component hooked on the track 12 in reverse. The climbing assembly and the rail 12 are in clearance fit. In addition, the climbing assembly and the rail 12 can be fixed by pinning.

The anchoring bases 11 are provided with a plurality of them and are pre-buried on the surface of the structure at a preset vertical distance. connected and attached to the same anchor seat 11 , and the anchor seat 11 and the rail 12 are connected by bolts. In addition, the specifications of the anchoring bases 11 corresponding to the surface of the structure with different heights are different, so that the arrangement of the rails 12 can meet the climbing requirements of the climbing assembly.

Preferably, the track 12 in this embodiment is a standard 4m long track, and the vertical distance between two adjacent anchoring seats 11 is 4m. In addition, the self-climbing system 1 includes at least three of the rails 12, and the rails 12 can be used alternately. When reversing, it is only necessary to transfer the lowermost rail 12 to the top of the uppermost rail 12 for splicing. , there are four tracks in this embodiment.

Please refer to FIG. 1 and FIG. 2 , the rail 12 is further provided with an upper load-bearing shear block 121 and a lower load-bearing shear block 122 respectively abutting on the anchor seat 11 , so as to transmit the load of the rail 12 to on the anchor seat 11 .

In addition, the side of the rail 12 connected to the anchoring seat 11 is defined as the back side, the two side surfaces of the rail 12 are provided with anti-hook grooves 123 along the longitudinal direction thereof, and the climbing component is provided with the anti-hook groove 123 The hook groove 123 is clearance-fitted with the anti-hook portion 130 .

Specifically, the groove bottom of the anti-hook groove 123 is parallel to the longitudinal direction of the rail 12 , the first groove wall of the anti-hook groove 123 near the front of the rail 12 is perpendicular to its groove bottom, and the first groove wall near the back of the rail 12 is perpendicular to the groove bottom. The second groove wall intersects with its groove bottom obliquely, so that the cross-sectional width of the groove bottom of the anti-hook groove 123 is smaller than the cross-sectional width of the groove opening. The anti-hook portion 130 of the climbing assembly includes a slider 1301 whose cross-sectional shape is adapted to the cross-sectional shape of the anti-hook groove 123, and a connecting arm connecting the end of the slider 1301 and the main body of the climbing assembly 1302.

The climbing assembly includes a climbing frame jacking seat 131 , an oil cylinder seat 132 and a climbing frame guide seat 133 , and a jacking oil cylinder 41 is arranged between the climbing frame jacking seat 131 and the oil cylinder seat 132 . The bottom of the oil lift cylinder 41 is fixedly connected with the oil cylinder base 132 , the extending end of the piston rod is connected with the climbing frame jacking seat 131 , and the climbing frame jacking seat 131 and the hoisting system 2 are connected by bolts The climbing frame jacking seat 131 and the oil cylinder seat 132 are all movably connected with the rail 12, so that the jacking frame jacking seat 131 is intermittently pushed by the jacking oil cylinder 41 to drive the The hoisting system 2 climbs along the track 12 .

The climbing frame jacking seat 131 and the oil cylinder seat 132 can be pinned and fixed to the rail 12 . The rail 12 is located between its anti-hook groove 123 and its front face, and is perpendicular to the longitudinal direction of the rail 12 . The insertion pin holes 124 on both sides of the rail 12 are passed through, and the connection arm 1302 of the climbing assembly is provided with insertion pin holes matching the insertion pin holes 124 of the rail 12 .

Preferably, the climbing frame jacking seat 131 , the oil cylinder seat 132 and the climbing frame guide seat 133 are symmetrically provided with two sliding blocks 1301 and two connecting arms 1302 , the climbing frame jacking seat 131 and the oil cylinder seat 132 At least one connecting arm 1302 is provided with a plug-in pin mechanism, so that the plug-in pin mechanism cooperates with the plug-in pin hole 124 of the rail 12 to realize the climbing frame jacking seat 131 and the oil cylinder seat 132 and the rail Active connections between 12. In addition, the length of an extension stroke of the piston rod of the jacking cylinder 41 and the distance between the two adjacent insertion pin holes 124 of the rail 12 are in a multiple relationship, that is, the climbing frame jacking seat 131 and the oil cylinder seat 132 are each in a multiple relationship. The distance of the second movement is a multiple of the distance between the two adjacent plug holes 124 of the rail 12 , so that the plug mechanisms of the climbing frame jacking block 131 and the cylinder block 132 can just match the plug holes of the rail 12 . 124 mate pinning.

At least one connecting arm 1302 of the climbing frame jacking seat 131 is provided with a single-axis hydraulic plug-in mechanism 1311, and the single-axis hydraulic plug-in mechanism 1311 pushes a plug-in pin through an oil cylinder to complete the climbing frame top The connection and decoupling between the lift seat 131 and the rail 12, correspondingly, the connecting arm 1302 of the single-axis hydraulic plug-in mechanism 1311 corresponding to the climbing frame jack-up seat 131 should be provided with an available plug-in pin Through the plug pin hole 1313. At least one connecting arm 1302 of the oil cylinder base 132 is provided with a biaxial hydraulic plugging pin mechanism 1321, and the biaxial hydraulic plugging pin mechanism 1321 pushes two plugging pins through an oil cylinder to complete the connection between the oil cylinder base 132 and the rail. For the connection and decoupling between 12, the cylinder base 132 corresponding to the connecting arm 1302 of the biaxial hydraulic plug-in mechanism 1321 should be provided with two plug-in holes 1322 through which the plug-in pins can pass. In addition, the distance between the two insertion pin holes 1322 on the same connecting arm 1302 matches the distance between the two adjacent insertion pin holes 124 of the rail 12 . In addition, the biaxial hydraulic plug-and-pull mechanism 1321 provided on the oil cylinder base 132 adopts two pin shafts to connect with the rail 12, so that when the jacking cylinder 41 lifts the climbing frame jacking seat 131, The oil cylinder base 132 has sufficient supporting force to ensure the stability of the climbing assembly and the hoisting system 2 during the climbing process.

As a preferred embodiment, the distance between the two adjacent insertion pin holes 124 of the rail 12 is 400 mm, and a stroke distance of the piston rod of the jacking oil cylinder 41 is 800 mm.

The climbing frame guide seat 133 is arranged below the oil cylinder seat 132, and the climbing frame guide seat 133 can guide the climbing of the lifting system 2, and can also play the role of a reverse hook to The stability of the hoisting system 2 climbing on the track 12 through the climbing assembly is improved. A plug-in pin hole 1331 is provided on the connecting arm 1302 of the climbing frame guide base 133, so that when the climbing frame jacking base 131 or the oil cylinder base 132 fails or the oil cylinder is maintained, the climbing frame can be temporarily increased by adding a pin shaft. The frame guide seat 133 is pinned to the rail 12 to lock the self-climbing system 1 safely.

Further, the front of the rail 12 is also provided with a plurality of anti-fall shearing blocks 125 arranged along its longitudinal direction, and the top of the climbing frame jacking seat 131 is provided with the anti-falling shearing blocks 125. The anti-fall locking tongue 1312 is matched with the snap-connected anti-fall locking tongue 1312, and the anti-fall locking tongue 1312 includes a wedge-shaped block hinged to the climbing frame jacking base 131 through a pin. When the climbing frame jacking base 131 moves down relative to the track 12, the wedge-shaped block can be engaged with the anti-fall shear block 125, so that when the climbing frame jacking base 131 falls down unexpectedly, The anti-fall locking tongue 1312 can quickly lock the lifting mold base in an emergency. During the upward climbing process of the climbing frame jack 131 , the anti-fall locking tongue 1312 can be pushed out of the range of the anti-fall shear block 125 to release the connection between the climbing frame jack 131 and the rail 12 . locking.

Further, the distance between the adjacent two anti-fall shear blocks 125 is equal to the distance between the two adjacent plug holes 124 of the rail 12 , that is, the two adjacent anti-fall shear blocks are The pitch of the blocks 125 is 400mm.

Please refer to FIG. 1 and FIG. 3 , the hoisting system 2 includes a climbing frame 21 , a hoisting truss 22 and a crane 23 , the hoisting truss 22 is arranged on the top of the climbing frame 21 , and the hoisting The crane 23 is arranged on the top of the lifting truss 22 and can move along the longitudinal direction of the lifting truss 22 .

Two of the climbing frames 21 are provided on opposite sides of the same structure, each of the climbing frames 21 is connected with two sets of the self-climbing systems 1 arranged side by side, and each set of the self-climbing systems 1 includes a row of tracks. 12 and at least one set of said climbing assemblies. Preferably, each row of rails 12 includes at least three rails 12 connected end to end, the rails 12 are used alternately, and the climbing assemblies in this embodiment are provided with two upper and lower groups, using two groups of climbing assemblies and the lifting system 2 is connected for climbing, which can ensure the stability of the lifting system 2 during the climbing process. In addition, when one of the two groups of climbing assemblies fails, the remaining group of the climbing assemblies can continue to work. Considering the redundant design, a set of the climbing components can also work normally.

As a further preference, the distance between the two rows of rails 12 of the two sets of self-climbing systems 1 located on the same side is 3300 mm, and the two rows of rails 12 are respectively connected with both sides of the climbing frame 21, which satisfies the requirements of the climbing frame. The structural force requirement of 21 ensures the stability of the climbing frame 21 during the climbing process.

Further, since the climbing frame 21 on both sides of the structure will be affected by the horizontal force during the lifting and crawling and lifting operations of the lifting formwork, the horizontal constant reaction force mechanism 211 is set on the climbing frame 21 on both sides of the structure, so The horizontal constant reaction force mechanism 211 constrains the two groups of climbing frames 21 in the horizontal inward direction, thereby eliminating the uncertainty of the relative lateral position between the climbing frames 21 and the rails 12 during the crawling process of the lifting formwork due to the influence of the horizontal force. It improves the overall stability of the lifting mold base.

Specifically, the horizontal constant reaction force mechanism 211 includes steel strands connecting two groups of the climbing frames 21 , and the end of the steel strands close to the middle pressure rod of the lifting truss 22 is a fixed end, which is close to the One end of the main tie rod at the tail of the lifting truss 22 is used as the tensioning end, so as to provide power through the overall hydraulic system of the lifting mold frame, the accumulator maintains the pressure, and the steel strand is tensioned by the oil cylinder to achieve horizontal constant reverse. force function.

Please refer to FIG. 9 , the lifting truss 22 is a truss structure, which is formed by connecting rods of different specifications, wherein the main longitudinal beam of the lifting truss 22 is between the main tension and compression rods and the end beams. Flange connection is adopted, and pin connection is adopted between the side struts, the top strut and the tail cross brace and the main slant bar, which is convenient for disassembly and reconstruction.

Specifically, the top main longitudinal beam of the lifting truss 22 extends to the outside of the installation range of the structure in the transverse or along the bridge direction, so that the vertical section of the lifting truss 22 is in the shape of an inverted right-angled trapezoid. The top of the climbing frame 21, and no diagonal bracing is provided on the inclined surface of the lifting truss 22, the hydraulic lifting system 3 can hoist the continuous structure from the inclined surface of the lifting truss 22 to enter the lifting truss 22 inside, so as to be installed with the installed structure.

Please refer to FIG. 3 , FIG. 4 and FIG. 5 , the hoisting crane 23 is arranged on the top of the hoisting truss 22 and travels along the longitudinal direction of its main longitudinal beam, and at the same time, the top of the climbing frame 21 and the A swinging support 241 and a sliding swinging support 242 are arranged between the lifting trusses 22 .

The swinging support 241 is located at the middle pressure bar of the lifting truss 22, and the swinging support 241 includes a climbing frame connecting part 2411 and a truss front end connecting part 2412. The climbing frame connecting part 2411 is connected to the The climbing frame 21 is fixed, the front end connecting part 2412 of the truss is fixed with the lifting truss 22 , and the climbing frame connecting part 2411 is hinged with the front end connecting part 2412 of the truss. The swinging support 241 can change the included angle between the climbing frame 21 and the lifting truss 22, so that the lifting truss 22 is always in a horizontal stress state. The sliding and swinging support 242 includes a climbing frame connecting portion 2421 and a truss tail end connecting portion 2422. The climbing frame connecting portion 2421 is fixed with the climbing frame 21, and the climbing frame connecting portion 2421 is connected with the truss tail end. The connecting part 2422 is hinged, and the bottom main longitudinal beam of the lifting truss 22 is located at its rear end with a truss anti-hook track 222 extending along its longitudinal direction, and the truss rear end connecting part 2422 is hooked to the truss Rails 222 are fitted and moveable along the truss hook rails 222 . The sliding and swinging support 242 can change the angle between the climbing frame 21 and the lifting truss 22, and can automatically adapt to the distance between the two rows of climbing frames 21 in the same structure, so that the lifting truss 22 It is always in a state of horizontal force, which is conducive to the lifting of structures.

The lifting crane 23 includes a lower sliding beam 231 and an upper sliding beam 232. The lower sliding beam 231 extends along the longitudinal direction perpendicular to the main longitudinal beam of the lifting truss 22. The lifting truss The top main longitudinal beam of 22 is provided with a first anti-hook rail 221 and a first traveling jack 42 extending along its longitudinal direction. Two of the first anti-hook rails 221 are arranged side by side, and the lower sliding beam 231 The two sides are respectively attached to the two first anti-hook rails 221, the piston rod of the first traveling jack 42 is connected with the lower sliding beam 231, and its cylinder is connected to the first anti-hook rail 221. connected, so that the lower sliding beam 231 is pulled by the first traveling jack 42 to realize that the hoisting crane 23 travels along the longitudinal direction of the hoisting truss 22 .

The lower sliding beam 231 is provided with a second anti-hook rail 2311 and a second traveling jack 43 extending along its longitudinal direction, the upper sliding beam 232 is attached to the second anti-hook rail 2311, and Pushed by the second travel jack 43 , the upper sliding beam 232 is moved along the second anti-hook rail 2311 .

At the same time, the first anti-hook rail 221 and the second anti-hook rail 2311 are provided with locking devices (not shown in the figure, the same below), so as to realize the lower sliding beam 231 and the upper sliding beam respectively. Locking of beam 232.

The hydraulic lifting system 3 is arranged on the upper sliding beam 232, and can be moved laterally and longitudinally along the lifting truss 22 under the action of the first traveling jack 42 and the second traveling jack 43, to The connecting structure is hoisted from the side of the installed structure to the top of the installed structure for installation.

Preferably, the hydraulic lifting system 3 in this embodiment adopts a 350t×2 hydraulic quick lifting system, which has two sets of jack mechanisms located at both ends of the upper sliding beam 232 for synchronous lifting, and the maximum traction force can reach 350t.

In addition, it is known that the self-climbing hydraulic system of the present application is responsible for the lifting and climbing of the whole machine, the vertical movement of the sliding crane, the lateral movement of the lifting crane 23, and the action of the plug-in and pull-out mechanism of the whole equipment, that is, the above-mentioned lifting cylinder 41, plug The oil cylinder of the pin-pulling mechanism, the first traveling jack 42, the second traveling jack 43 and the oil cylinder used for tensioning the steel frame line in the horizontal constant reaction force mechanism 211 all belong to the self-climbing hydraulic system, and the hydraulic pressure of the self-climbing hydraulic system is The station is installed on the working platform in the middle of the climbing frame 21 to provide pressure oil for each oil cylinder and jack.

The hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 of the present application also includes an electrical system (not shown in the figure, the same below), and the electrical system specifically includes a complete machine electrical control system, a safety monitoring system and a remote video monitoring system three systems.

Among them, the control object of the electrical control system of the whole machine mechanism is each working mechanism of the whole machine, including the power control system, the lifting of the climbing frame 21, the vertical and horizontal movement of the crane 23, etc., with high safety, reliability and completeness The function of preventing misoperation can meet the requirements of large-scale smooth speed regulation of the crane, and can also meet the high-precision synchronous control of the lifting process of the climbing frame 21. The control part of the system can be realized by Siemens programmable controller, which has the characteristics of advanced control, high reliability, convenient programming and modification. PLC is the core of the entire speed control system, responsible for the logic control of all input and output control points of the system. PLC adopts AC220V power supply. PLC is mainly used to receive the main command signal, send out control signals of each mechanism, and control the actions of each mechanism.

The safety monitoring system is designed to be in a safety interlock state through a program, and the PLC can automatically identify and block erroneous operation instructions or quickly cut off the fault circuit, thereby effectively preventing the occurrence of safety accidents. The machine is equipped with a load limiter. When the hoisting weight exceeds the specified value of the load, it will automatically cut off the operation in the dangerous direction of the hoisting, and issue an audible and visual alarm to remind the operator that at this time, the crane can only run in the safe direction. The safety monitoring system also includes an anti-fall speed measurement power release system. When the lifting speed of the self-climbing system 1 is greater than a set value, the power system is automatically powered off for protection. In addition, by setting strain gauges at special stress points of the whole machine, the stress state of each main stress member can be detected in real time.

The remote video monitoring system is used to monitor the position of the self-climbing system 1 plugging and unplugging pins, the operation of the climbing frame 21, the continuous top Working conditions; a camera is installed on the electrical room to monitor the situation in the electrical room, and a camera is also installed on the main beam of the hoisting truss 22 to monitor the overall situation of the hoisting. A video monitor is placed in the driver's cab for easy viewing by the operator. At the same time, the video data is transmitted to the designated position of the bridge tower by wire, and remote video data sharing is carried out as needed.

After the lifting formwork completes the installation and construction of the steel tower, since the climbing frame 21, the lifting truss 22 and the crane 23 of the present application are all assembled with rods, the lifting formwork can be removed under the tower and then carried out Retrofit to form Deck Crane 20000.

Specifically, please refer to Fig. 11, using the lifting truss 22 of the original lifting formwork and its upper structure, according to the gauge requirements of the bridge deck crane 20000, select the truss beam of the appropriate length and the sliding beam of the crane, and at the same time The two sets of jack mechanisms of the hydraulic lifting system 3 are changed to one set of jack mechanisms, and the jack mechanism is located in the middle of the hoisting crane 23 .

That is, the bridge deck crane 20000 includes a crane truss 20001, a crane crane 20002, a crane jack mechanism 20003 and a spreader 20004. The structure of the crane crane 20002 is the same as that of the crane crane 23 for lifting the formwork The structure is the same, the crane jack mechanism 20003 is installed on the crane crane 20002, so that under the action of the crane crane 20002, the crane jack mechanism 20003 can move along the crane truss 20001. Horizontal or vertical movement. The crane jack mechanism 20003 is connected to the spreader 20004 through a steel strand, and the spreader 20004 is composed of a steel strand anchoring end, a main beam, a shoulder beam, an adjustment oil cylinder, etc., and its movable steel strand anchoring end The position of the lifting point is changed by the expansion and contraction of the oil cylinder, so as to achieve the purpose of precisely adjusting the position of the lifting point, and the two ends of the pole beam are provided with hinged lifting ears.

The bottom of the crane truss 20001 is provided with a track beam 20005, the track beam 20005 is placed in the steel box girder design support position, and the track beam 20005 is provided with a walking thrust reaction force seat (not shown in the figure, the same below) And the standard hole position (not marked in the figure, the same below). The bottom of the crane truss 20001 is provided with four sliding shoes 20006 to be supported above the rail beam 20005. The sliding shoes 20006 are composed of a sliding block and an anti-hook device. Reduce the frictional resistance when walking; the anti-hook device lifts the rail beam 20005 when the rail beam 20005 is moved forward to ensure that the rail beam 20005 does not drag on the steel box beam, and the push cylinder reaction force seat and the rail beam 20005 are connected The connection and disconnection are realized by plugging and unplugging the pins.

Between the crane truss 20001 and the rail beam 20005, a walking cylinder 20007 is arranged to make the sliding shoe 20006 of the deck crane 20000 slide on the rail beam 20005 to realize the movement of the whole machine. The rail beam 20005 is hinged, and the protruding end of the piston rod is hinged with the sliding shoe 20006. In this embodiment, the maximum distance that the deck crane 20000 slides on the rail beam 20005 at one time is 3.2m.

At the same time, the bridge deck crane 20000 is also provided with a whole machine anchoring system, which includes a front support cylinder 20008 (with a screw top function), a steel support 20009, a rear support cylinder 20010 and a rear anchor mechanism (not shown in the figure). , the same below). Specifically, two sets of steel supports 20009, two sets of front support cylinders 20008, two sets of rear support cylinders 20010 and two sets of rear anchor mechanisms are installed at the bottom of the bridge deck crane 20000. The bridge deck crane 20000 When walking, the frame beam state of the deck crane 20000 can be realized by controlling the front support cylinder 20008 and the rear support cylinder 20010. At this time, the steel support 20009, the front support cylinder 20008 and the rear anchor mechanism are stressed. . When walking, the crane frame beam state is realized by controlling the front support cylinder 20008 and the rear support cylinder 20010. The rear anchor mechanism includes an anchor beam located at the tail of the main longitudinal girder at the bottom of the crane truss 20001, which can anchor the tail of the deck crane 20000 to the steel girder deck and withstand the upward pulling force of the deck crane 20000 when it works. .

The walking process of the bridge deck crane 20000 is as follows:

First, the bridge deck crane 20000 is supported on the datum plane by the front support cylinder 20008 and the rear support cylinder 20010, and the support cylinder is jacked up, so that the track beam 20005 of the bridge deck crane 20000 is in the beam state; then, by controlling The telescopic action of the walking cylinder 20007 makes the rail beam 20005 move forward; then the top cylinder is retracted, so that the rail beam 20005 is placed on the datum plane, and anchored to the datum plane through the rear anchor mechanism, at this time the whole machine The self-weight is fully supported on the rail beam 20005 through the sliding shoes 20006; through the telescopic action of the traveling cylinder 20007, the deck crane 20000 slides forward along the rail beam 20005 to achieve the purpose of longitudinal running.

After the lifting formwork of the present application is transformed into a deck crane 20000, the hydraulic system of the whole machine is divided into three parts: a deck crane hydraulic system, a lifting jack system and a spreader hydraulic system. The three systems are independent and self-contained, mainly to adapt to the work characteristics that are far apart from each other. The hydraulic system of the bridge deck crane and the crane jack system can use the original system of lifting the formwork, which can reduce the construction cost. The hydraulic system of the spreader needs to be newly made. The hydraulic station is placed on the main distribution beam of the spreader 20004, which is the lifting point. Adjust the oil cylinder to provide pressure oil source.

To sum up, the hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 of the present application solves the problems of high cost and slow progress of hoisting structures using tower cranes, and the hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 By attaching to the surface side wall of the structure, with its own operating platform and safety protection facilities, after the construction of a single section of the structure is completed, it is lifted to the hoisting position of the next section through the lifting system of the lifting formwork, and the process is simple and easy to operate. At the same time, after the construction of the structure is completed, the lifting formwork can be changed to the bridge deck crane 20000 after a simple modification, so as to hoist the steel box girder, thereby reducing the project cost.

In addition, the hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 of the present application can be used in a hybrid girder cable-stayed bridge of a double-tower double-cable plane semi-floating system. Both towers include two steel towers, the two steel towers are divided into 30 tower column segments, the tower columns are all rounded rectangular sections, and the tower columns are divided into an upper tower column and a lower tower column. The tower column is a steel-concrete composite structure involving variable cross-section, so that the size of the lower tower column from bottom to top is changed from large to small, and the upper tower column is a steel structure designed with equal cross-section. Specifically, the lower tower column is the T1-T15 segment, the T3 segment is the longest, and the upper tower column is the T16-T30 segment, and the T29 segment is the longest. The structure lifted by the lifting formwork 10000 of the cable-stayed bridge is the steel tower segment in this embodiment.

In addition, three upper, middle and lower steel beams are also arranged between the two steel towers, and the lengths of the upper, middle and lower steel beams increase sequentially.

With respect to the above-mentioned steel tower structure, the present application also relates to an installation method for lifting a steel tower using the above-mentioned hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000, which is aimed at the inclined tower section, straight tower section, Variable section tower sections and steel beams include the following sub-methods:

The installation method of the inclined tower section specifically includes the following steps:

First, install the hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000 (hereinafter referred to as the self-elevating lifting formwork) on the top of the installed steel tower segment that meets the height requirements.

When the self-elevating formwork is installed, it specifically includes the following steps: the anchoring bases 11 of the self-elevating formwork are manufactured together with the steel tower segments, and the vertical distance between the two adjacent anchoring bases 11 is the same as that of the single anchoring base. The length of the root track 12 is adapted, and then four tracks 12 are installed on the surface of the steel tower segment and connected with the anchoring seat 11 . Then, the climbing frame guide seat 133 , the oil cylinder seat 132 and the climbing frame jacking seat 131 are sequentially installed on the installed track 12 , and locked with pins. When installing the climbing frame guide seat 133 , the oil cylinder seat 132 and the climbing frame jacking seat 131 , it should be noted that the anti-hook cooperation and guiding function between each support and the track 12 are normal. In addition, the climbing frame guide seat 133 , the oil cylinder seat 132 and the climbing frame jacking seat 131 can also be installed on the track 12 first, and then attached to the anchor seat 11 together with the track 12 as a whole. Then install the climbing frames 21 on both sides of the steel tower segment and the horizontal constant reaction force system between the climbing frames 21 on both sides in turn, and then install the lifting truss 22 on the top of the climbing frames 21 on both sides. A swinging support 241 and a sliding swinging support 242 need to be arranged between the lifting trusses 22 . Following the installation of the hoisting crane 23 on the hoisting truss 22, firstly install the lower sliding beam 231 of the crane 23 and the related traveling mechanism, and then install the upper sliding beam 232 and the related traveling mechanism . Finally, the hydraulic lifting system 3 is installed on the upper sliding beam 232 .

After the self-elevating formwork is installed, it is debugged, tested and accepted, and the hoisting and self-climbing operation of the steel tower segment can be started only when the self-elevating formwork is equipped with operation adjustment.

Next, use the self-elevating formwork to hoist the single-segment-connected steel tower segment from one side of the steel tower to the top of the installed steel tower segment for installation, and the self-elevating formwork can be connected to the The steel tower segment is fine-tuned and positioned, so that the continuous steel tower segment can be lowered and constructed corresponding to the construction position on the top of the installed steel tower segment.

After the connecting steel tower segment is installed in place, the self-elevating formwork can use its self-climbing system 1 to climb to the next station (ie the newly installed connecting steel tower segment) for the next connecting The steel tower segments are hoisted and installed with the installed steel tower segments.

Among them, since the transverse curvature of the inclined tower section of the tower column changes greatly, and the center line along the bridge is consistent, the lifting position of the self-elevating formwork is located on the inclined side of the inclined tower section, correspondingly The rails 12 of the self-elevating formwork are arranged on opposite sides of the inclined tower section along the inclination direction, that is, the lifting truss 22 serving as the cantilever of the self-elevating formwork extends along the bridge to the tower out of the column range to facilitate lifting operations.

When the steel tower segment is hoisted, the hoisting crane 23 of the self-elevating formwork is moved to the outer side of the hoisting truss 22 outside the range of the tower column, and two 350t jack mechanisms of its hydraulic lifting system 3 are used. The continuous steel tower segment is lifted from the bottom of the tower to the lifting truss 22, and the hydraulic lifting system 3 and the continuous steel tower segment are driven by the crane 23 to move from the inclined surface of the lifting truss 22 to the desired position. Lift the inner side of the lifting truss 22, and lower the continuous steel tower segment to the installation position on the top of the installed steel tower segment.

Since the bottom-up size of the tower column of the inclined tower section changes from large to small, the distance between the two climbing frames 21 of the self-elevating formwork on the same steel tower section also changes with the increase of the steel tower. If it is small, the swing support 241 and the sliding swing support 242 between the climbing frame 21 and the hoisting truss 22 can effectively keep the hoisting truss 22 in a horizontal state all the time.

In addition, it should be noted that the climbing process of the self-elevating climbing formwork in the inclined tower section, the straight tower section and the variable-section tower section is the same, that is, when the climbing assembly climbs along the track 12, first The cylinder base 132 is connected to the track 12 , the climbing frame jacking base 131 is decoupled from the track 12 , and the piston rod of the jacking cylinder 41 extends a stroke to drive the hoisting system 2 Move along the track 12 for a distance of one stroke; then connect the climbing frame jacking seat 131 and the track 12, the oil cylinder seat 132 is decoupled from the track 12, and the piston rod of the jacking oil cylinder 41 returns to the When retracted, the cylinder base 132 moves relative to the track 12 for one stroke; then the cylinder base 132 and the track 12 are connected, the climbing frame jacking base 131 is decoupled from the track 12, and the above steps are repeated to make the The climbing assembly and hoisting system 2 are climbed onto the connected completed steel tower segment. At the same time, in the self-climbing system 1 of the present application, a single row of four rails 12 is used for alternate reversal. When the rails 12 are reversing, it is only necessary to transfer the lowermost rail 12 to the top of the uppermost rail 12 and pass the The anchoring seat 11 is used for anchoring.

The installation method of the straight tower section includes the following steps:

Install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements. Knowing that the straight tower section is the upper column of the steel tower, the hoisting of the steel tower section of the straight tower section can follow the inclined tower section. The self-elevating type lifting formwork.

The self-elevating hoisting formwork is used to hoist the single-section continuous steel tower segment from one side of the steel tower to the top of the installed steel tower segment for installation.

After the connecting steel tower segment is installed in place, the self-elevating formwork can use its self-climbing system 1 to climb to the next station (ie the newly installed connecting steel tower segment) for the next connecting The steel tower segments are hoisted and installed with the installed steel tower segments.

It should be understood that the hoisting process of the steel tower section of the straight tower section is the same as the hoisting process of the steel tower section of the inclined tower section, but the lifting position of the self-elevating formwork can be located in the transverse bridge direction or the longitudinal bridge direction. to either side.

There will be a curvature change at the connection position between the inclined tower section and the straight tower section (that is, there is a curvature change point at the joint J15 of the T14 section and the T15 section), and the surface of the steel tower changes from the inclined state to the vertical state, so the change The installation method of the section tower section includes the following steps:

First, install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements. It is known that the curvature change point is located between the inclined tower section and the straight tower section, so the self-elevating lifting formwork set here can be The self-elevating formwork of the inclined tower section is used.

The self-elevating formwork is used to hoist the continuous steel tower section from one side of the steel tower to the top of the installed steel tower section for installation, and the continuous steel tower section is used as the current wheel of the self-elevating formwork. The second climbing foundation is used, and the deflection angle of the self-elevating lifting formwork attached to the continuous steel tower section is adjusted according to the preset curvature/angle change value of the variable section tower section.

After the continuous steel tower segment is installed in place, adjust the deflection angle of the track 12 of the self-elevating formwork for subsequent climbing rounds again;

The self-elevating lifting formwork climbs to the next station to install the next continuous steel tower section until the installation process of the variable section tower section is completed.

Preferably, the deflection angle of the track 12 of the self-elevating formwork is in the range of 0.2° to 0.3° each time. Specifically, the track 12 can be adjusted by adjusting the height of the anchor seat 11 and the surface of the steel tower segment. deflection angle.

In order to ensure the normal climbing of the hoisting system 2, a reasonable gap is set between the climbing components (ie the climbing frame jacking seat 131, the oil cylinder seat 132 and the climbing frame guide seat 133) and the rail 12 to accommodate Clearance effects due to curvature changes. Preferably, the gap between the climbing assembly and the track 12 is not greater than 5 mm, so as to ensure that the climbing assembly and the track 12 can adapt to the influence of curvature changes, and also prevent the Instability of climbing assemblies during climbing. At the same time, the diameter of the insertion pin hole 124 of the rail 12 is larger than the pin shaft of the insertion pin mechanism of the climbing frame jacking seat 131 and the oil cylinder seat 132, and the specific range is 0.5mm to 1mm to ensure sufficient clearance. Accommodates curvature changes during climbs.

In this embodiment, the angle change of the steel tower surface is 0.8°, then the track 12 can start to set the turning angle at the T13 segment, each turn is 0.2°, and then climb a section of the track 12, and then proceed to the next time Corner, after a total of four corners, you can smoothly pass the curvature change point.

During the construction of the steel tower, the construction of steel beams can also be carried out. In this embodiment, the upper, middle and lower steel beams are located in the T29 section, the T15 section and the T5 section, respectively. The installation method of the steel beam includes the following step:

Under the condition that the two adjacent steel towers along the transverse bridge direction meet the height requirements, the self-elevating lifting formwork shall be installed on the top of the installed steel tower segments respectively. Since the construction of the steel beam and the construction of the steel tower are carried out simultaneously, the same set of self-elevating formwork can be used for the construction of the steel beam and the lifting and installation of the steel tower.

After the two adjacent steel towers have been constructed to the T6 section, the self-elevating formwork is used to hoist the lower beam to the installation position of the lower beam of the steel tower and install it.

Then build a temporary support platform higher than the top of the lower beam at the bottom of the tower, and assemble the middle beam on the temporary support platform, and then assemble the beam on the top of the middle beam. At the same time, the steel tower can be constructed synchronously, and the steel The tower construction stops construction at the temporary installation position of the upper beam, which is located above the installation position of the middle beam. In this embodiment, the temporary installation position is located at the T19 section, and the middle beam installation position is located at the T15 section. . In addition, the middle beam and the upper beam are assembled on the temporary support platform, so that the lower beam is not stressed during the assembly process of the middle beam and the upper beam, and the stability of the steel tower structure is ensured.

Then stop the construction of the steel tower when the steel tower is constructed to the T22 section, use the self-elevating formwork to hoist the upper beam to the temporary installation position for pre-fixation, and then use the self-elevating formwork for hoisting. Beam to the installation position of the middle beam and install it, then continue to construct the steel tower to the top of the tower, finally release the constraint between the upper beam and the steel tower, and use the self-elevating lifting formwork to hoist the upper beam to the top of the steel tower. Beam installation location and install.

When hoisting the beam, the self-elevating formwork needs to be applied to the self-elevating formwork of two adjacent steel towers. The specific operation process is as follows: first remove the constraints of the hoisting crane 23 and the hoisting truss 22, And the climbing frame 21 and the hoisting truss 22 are moved down to separate the hoisting truss 22 from the crane 23, so that the crane 23 is seated and anchored on the top of the completed steel tower segment, and the hydraulic lifting system 3 is moved laterally to Close to the inner side of the main longitudinal beam of the lifting truss 22, and then lift the steel beam through the hydraulic lifting system 3 on the top of the two adjacent steel towers. The climbing frame 21 and the hoisting truss 22 move up and restore the self-elevating formwork under the action of the climbing assembly.

At the same time, since the anti-fall locking tongue 1312 and the anti-fall shear block 125 provided between the climbing frame jacking seat 131 and the track 12 are clamped to limit the downward movement of the climbing assembly, the climbing frame 21 and the hoisting truss 22 are Before the downward movement, the anti-fall locking tongue 1312 is removed from the climbing frame jacking seat 131 to ensure the smooth downward movement of the climbing frame 21 and the lifting truss 22 .

In addition, the downward movement distance of the climbing frame 21 and the lifting truss 22 is in a multiple relationship with the distance between the two adjacent plug-in pin holes 124 of the rail 12 . Preferably, the downward movement distance in this embodiment is 800mm.

Further, when the upper beam and the middle beam are hoisted, the overall hoisting operation can be carried out by means of the distribution beam pocket bottom hoisting.

The pre-fixation of the upper beam at the temporary installation position of the steel tower can be realized by welding or corbel bolting. Preferably, in this embodiment, the upper beam is pre-fixed by means of corbel bolting. Since the length of the upper beam is less than the length of the middle beam, in the process of constructing the steel tower, temporary bolts can be set on the surface of the steel tower in advance. After passing through the temporary corbel, extend the length of the temporary corbel, lower the upper beam to the temporary corbel, and fix it with bolts. When the beam is lifted later, it is only necessary to release the locking and fixing of the bolts, the operation is simple, the use efficiency is improved, and the temporary corbel can be used for turnover.

Obviously, the application uses the self-elevating formwork to hoist the steel beams, and the steel beams at high altitude are changed to ground and low-altitude loosely assembled. and reduced security risks.

After the upper beam is hoisted, other cranes can be used to remove the hydraulic self-elevating integrated cable-stayed bridge lifting formwork 10000. First, remove the hydraulic lifting system 3 and the upper sliding beam 232 of the crane 23 in the air, then remove the lower sliding beam 231 of the crane 23, then remove the lifting truss 22 and the climbing frame 21, and then remove the climbing assembly and the track 12, and finally remove all the anchoring bases 11 on the surface of the steel tower at one time.

The dismantled mechanisms for lifting the formwork can be simply modified to form a deck crane 20000 for hoisting and erecting the steel box girder. Lifting integrated cable-stayed bridge lifting formwork 10,000 is transformed into 20,000 deck cranes, which can reduce the cost of cable-stayed bridge construction measures.

Claims (12)

1. A method for lifting and installing a steel tower, comprising the following sub-methods:

   The installation method of the inclined tower section: install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements, and use the self-elevating lifting formwork to hoist the continuous steel tower section from the side of the steel tower to the installed steel tower section. Install the top of the steel tower segment for installation. After the continued steel tower segment is installed in place, the self-elevating formwork uses its self-climbing system to climb to the next station for the next continuous steel tower segment. installation, the continuous steel tower segment is installed according to the line shape of the inclined tower segment, and the hoisting frame body of the self-elevating formwork is kept horizontal;

   The installation method of the straight tower section: install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements, and use the self-elevating lifting formwork to hoist the continuous steel tower section from the side of the steel tower to the installed steel tower section. Install the top of the steel tower segment for installation. After the continuous steel tower segment is installed in place, the self-elevating formwork uses its self-climbing system to vertically climb to the next station for the next continuous steel tower. segment to install;

   The installation method of the variable section tower section: install the self-elevating lifting formwork on the top of the installed steel tower section that meets the height requirements, and adjust the current climbing round according to the preset curvature/angle change value of the variable section tower section. The deflection angle of the track of the lifting formwork, the self-elevating formwork is used to hoist the continuous steel tower segment from one side of the steel tower to the top of the installed steel tower segment for installation, and the continuous steel tower is installed. After the segment is installed in place, adjust the deflection angle of the track of the self-elevating formwork in subsequent climbing rounds again, and the self-elevating formwork climbs to the next station to install the next continuous steel tower segment, Until the installation process of the variable-section tower section is completed;

   The installation method of the steel beam: install the self-elevating lifting formwork on the top of the installed steel tower segments that meet the height requirements of the two adjacent steel towers along the transverse bridge direction, and use the self-elevating lifting formwork to hoist the whole. The installation position of the lower beam from the beam to the tower column is to assemble a temporary support platform higher than the top surface of the lower beam at the bottom of the tower, assemble the middle beam on the temporary support platform, and then assemble the beam on the top of the middle beam. The lifting formwork is used to hoist the upper beam to the temporary position of the tower column as a whole, and the temporary position is above the installation position of the middle beam, and the self-elevating lifting formwork is used to hoist the middle beam to the middle beam of the tower as a whole. In the installation position, the self-elevating formwork is used to hoist the upper beam from the temporary position as a whole to the installation position of the upper beam of the tower column.
2. The method for lifting and installing a steel tower according to claim 1, wherein the self-elevating formwork is a hydraulic self-elevating integrated cable-stayed bridge lifting formwork, comprising a self-climbing system, a hoisting system and a hydraulic lift system; wherein, the self-climbing system includes an anchor seat pre-buried on the steel tower segment, a track attached to the anchor seat, and a climbing assembly hooked on the track, the hoisting system and the The climbing assembly is connected and moves along the track under the action of the climbing assembly; the lifting system includes a climbing frame, a lifting truss and a crane, and the climbing frame is connected with the climbing assembly, The lifting truss is arranged on the top of the climbing frame, and the hydraulic lifting system is arranged on the top of the lifting truss and can move along the longitudinal or lateral direction of the lifting truss to hoist the connecting structure to the installed structure installed at the top.
3. The steel tower lifting and installation method according to claim 2, wherein in the installation method of the inclined tower section, the lifting position of the lifting formwork of the hydraulic self-elevating integrated cable-stayed bridge is located at the inclined position of the inclined tower section. One side, correspondingly, its tracks are arranged on both sides of the inclined tower section along the inclined direction;

   In the installation method of the straight tower section, the lifting position of the lifting formwork of the hydraulic self-elevating integrated cable-stayed bridge is located on either side of the transverse bridge direction or the longitudinal bridge direction.
4. The method for lifting and installing a steel tower according to claim 2, wherein the climbing system comprises a climbing frame jacking seat, an oil cylinder seat and a jacking oil cylinder connected between the two;

   When the climbing assembly climbs along the track, it first connects the oil cylinder seat with the track, the climbing frame jacking seat is decoupled from the track, and the piston rod of the jacking oil cylinder extends for a stroke. , to drive the hoisting system to move along the track for a distance of one stroke;

   Then, the climbing frame jacking seat and the track are coupled, the oil cylinder seat is decoupled from the track, the piston rod of the jacking oil cylinder is retracted, and the oil cylinder seat moves one stroke relative to the track;

   Then connect the oil cylinder block and the track, and decouple the climbing frame jacking block from the track, repeat the above steps and make the climbing assembly and the hoisting system climb to the completed steel tower segment.
5. The method for lifting and installing a steel tower according to claim 4, wherein the rail is provided with a plurality of plug-in pin holes perpendicular to the longitudinal direction along its longitudinal direction, and the climbing frame jacking seat and the The oil cylinder base is provided with a plugging pin mechanism, and the plugging pin mechanism cooperates with the plugging pin hole to realize the coupling or decoupling of the climbing frame jacking base and the oil cylinder base and the rail.
6. The method for lifting and installing a steel tower according to claim 2, characterized in that, in the method for installing a variable-section tower section, an anchoring seat is used to adjust the deflection angle of the track of the self-elevating formwork of the current climbing round, and all the The range of the deflection angle is 0.2°˜0.3°.
7. The method for lifting and installing a steel tower according to claim 2, wherein a swing bearing and a sliding swing bearing are arranged between the top of the climbing frame and the lifting truss;

   Wherein, the swinging support is located at the middle pressure bar of the lifting truss, the swinging support includes a connecting part of a climbing frame and a connecting part of the front end of the truss, the connecting part of the climbing frame is fixed with the climbing frame, the The front end connecting part of the truss is fixed with the lifting truss, and the connecting part of the climbing frame is hinged with the front end connecting part of the truss;

   The sliding and swinging support includes a connecting part of a climbing frame and a connecting part of the tail end of the truss, the connecting part of the climbing frame is fixed with the climbing frame, the connecting part of the climbing frame is hinged with the connecting part of the tail end of the truss, and the The bottom main longitudinal beam of the lifting truss is provided with a truss anti-hook track extending along its longitudinal direction at its rear end, and the connecting part of the truss tail end is matched with the truss anti-hook track and can be reversed along the truss. Orbit moves.
8. The method for lifting and installing a steel tower according to claim 7, wherein a horizontal constant reaction force system is arranged between two climbing frames of the same steel tower segment, and the steel tower follows the steel tower during the climbing process of the inclined tower segment. Segment width changes automatically adjust the spacing.
9. The steel tower lifting and installation method according to claim 7 is characterized in that, in the beam installation method, the constraints of the crane and the lifting truss are first released, and the climbing frame and the lifting truss are moved down, so that the The crane crane is located and anchored on the top of the completed steel tower section, and the hydraulic lifting system is moved laterally close to the inner main longitudinal beam of the lifting truss; then the beam is lifted by the hydraulic lifting system on the top of the adjacent two steel towers and lifted into place After that, the anchoring between the hoisting crane and the top of the completed steel tower segment is released, and the climbing frame and the hoisting truss are moved up under the action of the climbing assembly to restore the self-elevating formwork.
10. The method for lifting and installing a steel tower according to claim 9, characterized in that, when the upper beam and the middle beam are hoisted, the overall hoisting operation is performed by means of the distribution beam pocket bottom hoisting.
11. The method for lifting and installing a steel tower according to claim 2, further comprising a method for removing the self-elevating formwork: after the upper beam is hoisted, use other cranes to remove the hydraulic lifting system and the crane in the air , and then remove the lifting truss, climbing frame, climbing components and rails in turn, and finally remove all the anchoring seats at one time.
12. The method for lifting and installing a steel tower according to claim 1, further comprising a method for converting a self-elevating formwork into a bridge deck crane: removing each rod in the hoisting truss of the self-elevating formwork According to the requirements of the bridge deck hoisting gauge, select the appropriate rods and lifting cranes to reassemble to form the bridge deck crane. The bridge deck crane is used to lift the bridge deck steel box girder.

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