Hoisting and lengthening installation method of tower column main reinforcement under complex operation environment

Abstract

The application discloses a method for hoisting and lengthening and installing tower column main reinforcement in a complex operation environment, which comprises the following steps: designing and manufacturing a reinforcement hoisting device and a reinforcement supporting device, wherein the manufactured reinforcement hoisting device comprises an end supporting cylinder and a hoisting rope assembly, the end supporting cylinder is provided with an end mounting cavity, and the outer surface of the end supporting cylinder is further provided with a polyhedral supporting structure, and the hoisting rope assembly is connected with the end supporting cylinder; the reinforcement supporting device is installed on the tower column main reinforcement or a climbing formwork frame and is provided with a bayonet; the reinforcement hoisting device is used to hoist a reinforcement bundle to a supporting platform and make the reinforcement bundle vertically and obliquely support in the bayonet of the reinforcement supporting device; and the reinforcement bundle is lengthened and connected with the tower column main reinforcement by using the reinforcement supporting device and a reinforcement joint connecting device. The method can improve the lengthening and connecting installation quality between the reinforcement to be installed and the pre-buried tower column main reinforcement in a large-inclination cable tower and a dense reinforcement arrangement operation environment, effectively reduces the labor cost of the lengthening and connecting installation, and shortens the whole construction period.

Description

Technical Field

[0001] This invention relates to the field of bridge steel reinforcement hoisting and installation technology, and in particular, to a method for hoisting and splicing main steel reinforcement of cable tower columns under complex operating conditions. Background Technology

[0002] Cable-stayed bridges, as one of the most popular bridge types, play an irreplaceable role in bridge construction. Common cable-stayed bridge pylon structures include: single-column, double-column, portal, inclined-leg portal, inverted V-shaped, inverted Y-shaped, H-shaped, and A-shaped.

[0003] The cable-stayed bridge tower on the Guangdong Delta Plain is an A-shaped reinforced concrete structure with a total height of 124.7m. The tower column has a D-shaped single-box single-cell cross-section and includes a base, lower tower column, middle tower column, upper tower column, upper crossbeam, and tower crown. The lower tower column has an inward tilt of 1 / 6.57 and an outward tilt of 1 / 4.53; the middle tower column has an inward and outward tilt of 1 / 6.57; and the upper middle tower column has an outward tilt of 1 / 6.57. The tower column was constructed in 33 segments, with a standard vertical pouring height of 3.9m. Each segment's main reinforcement consists of 634 HRB500E 40mm diameter steel bars in the outer layer and 159 HRB400E 32mm diameter steel bars in the middle layer, resulting in a dense arrangement of main reinforcement. Mechanical connections are used for the long butt joints between the main reinforcement bars in each segment. The tower column formwork adopts hydraulic climbing formwork. The outer climbing formwork frame is equipped with a total of 5 operating platforms according to the platform height requirements for on-site concrete construction and rebar tying. The top rebar tying platform surrounds the outer perimeter of the tower column, forming a "D"-shaped operating platform with a width of 2.0m. It is inevitable that rebar hoisting and rebar splicing and installation will be carried out simultaneously on the same vertical plane, which is prone to safety risks such as falls from height and falling objects.

[0004] On the one hand, in the complex working environment of a confined construction space and a highly inclined cable tower, the traditional method of hoisting the main steel bars of the tower column is to first hoist the steel bars to the operating platform using a horizontal two-point hoisting method, and then manually move, erect, and connect the steel bars to the tower column. For example, a sling anti-slip device for vertical hoisting of tunnel segments disclosed in patent application number CN202111365241.2 includes a fixing mechanism for clamping and fixing the two ends of the tunnel segment and a connecting mechanism for fixing and connecting the top of the fixing mechanism. The fixing mechanism includes a vertically arranged extension and docking mounting plate and an upper clamping component and a lower clamping component arranged on the extension and docking mounting plate. The upper clamping component and the lower clamping component are arranged opposite to each other, with the upper clamping component abutting against the upper surface of the tunnel segment and the lower clamping component abutting against the lower surface of the tunnel segment. As disclosed in patent application number CN202311612128.9, a lifting device and method for assisting in the installation of reinforcing bars in bridge piers are provided. This lifting device includes a U-shaped steel plate and lifting rings. The lifting rings are U-shaped, and both ends are fixed to the sides of the U-shaped steel plate. Multiple fixing holes are provided on the bottom plate of the U-shaped steel plate. Positioning pins are provided at the fixing holes. The positioning pins are hollow rods with ring stops at their upper ends, and multiple openings are provided from bottom to top on the rod body. The process includes: S1. Placing the lifting device horizontally on the ground, with the openings of the U-shaped steel plate facing parallel to the ground; S2. Extending and installing the positioning pins in the positioning holes; S3. Passing the reinforcing bars through the positioning pins sequentially from front to back, adjusting the insertion length, and then tightening; S4. Fixing the slings to the lifting rings using a crane or hoist; S5. Lifting the lifting device to place the reinforcing bars in batches at the binding positions, and dismantling the lifting device after the reinforcing bars are bound. As disclosed in patent application number CN202420421079.4, an installation and positioning clamp for pier reinforcement includes a main frame with multiple sleeves on the main frame. Each sleeve includes a movable arc-shaped clamping piece. Limiting wire ropes are provided on both sides of the main frame, and the limiting wire ropes abut against the bottom of the multiple sleeves. The sleeves are used to clamp the reinforcement. As disclosed in patent application number CN202120839838.5, a reinforcement hoisting and clamping device includes a hoisting plate and two clamping plates. The hoisting plate has multiple through holes for reinforcement to pass through, and the through holes are spaced apart along the center line of the hoisting plate. The clamping plates can be slidably set on the hoisting plate in a direction perpendicular to the center line of the hoisting plate. The two clamping plates are arranged opposite each other and parallel to the center line of the hoisting plate. Each clamping plate has a semi-circular clamping groove at the position corresponding to each through hole. The radius of the semi-circular clamping groove is smaller than that of the through hole. The hoisting plate is provided with a pushing mechanism for pushing the two clamping plates to move towards each other.A rebar anti-fall hoisting device, as disclosed in patent application CN202120152645.2, includes a hoisting structure, a suspension structure, and a hoisting power equipment. The hoisting structure includes a bearing container respectively disposed at both ends of the rebar to be hoisted. The bearing container includes a container body, with a receiving cavity inside the container body. A closed structure is provided at one end of the receiving cavity, and an opening is provided at the other end of the receiving cavity. The bearing container is sleeved onto the rebar to be hoisted through the opening. The suspension structure includes a first rope structure, with both ends of the first rope structure connected to the openings of the bearing containers disposed at both ends of the rebar to be hoisted. The hoisting power equipment is connected to the middle of the first rope structure through a connecting structure. A device for hoisting rebar, as disclosed in patent application CN201620403357.9, includes a rebar and a hook of a hoisting machine for hoisting the rebar. The rebar is bound at two points by a wire rope. A sleeve is fitted onto one end of the rebar. One end of the wire rope is connected to the hook, and the other end is connected to the sleeve through a connecting rope. A steel bar hoisting assembly, as disclosed in patent application CN202323631986.6, includes a hoisting component and an auxiliary locking component. The hoisting component is fixed to a hoisting rope, and the auxiliary locking component is slidably adjustable on the hoisting rope. One end of a steel bar can be inserted into the hoisting component, and the steel bar can be vertically inserted into the hoisting component. The auxiliary locking component can lock the other end of the steel bar.

[0005] The defects of the above-mentioned steel bar hoisting method are as follows: The first method of hoisting steel bars requires stacking the steel bars on the operating platform. If the stacked steel bars exceed the maximum load-bearing capacity of the formwork frame, it may lead to the risk of the formwork frame falling and operator injury or death. Alternatively, because the steel bars are 4m long, it is not convenient to manually handle and erect the steel bars in the narrow "D"-shaped operating platform space, which reduces the efficiency of steel bar splicing and installation.

[0006] The second method of lifting steel bars is only applicable to lifting segments with a ring width of 1.2m to 1.5m. However, it cannot be completely replicated for lifting steel bars with a length of 4m, making it difficult to lift steel bars. For example, if the steel bar is too long, the anti-slip device of the sling may not be able to hold the steel bar, causing the steel bar to fall from a height and injure people.

[0007] The third to fifth methods of steel bar hoisting involve the hoisting of large quantities of horizontal steel bars. During the hoisting process, the weight of the steel bars causes the hoisting device and the hoisted steel bars to be in a vertical position in the air, intersecting with the axial direction of the main steel bars of the inclined tower column at a certain angle. This makes the aerial splicing and connection of the main steel bars of the tower column difficult to construct, and the quality of the splicing and connection does not meet the design requirements of Class I joints.

[0008] The sixth method of steel bar hoisting is the horizontal two-point hoisting method. Although it has the advantages of preventing steel bars from slipping, reducing safety risks, and protecting the quality of steel bar threads, the steel bars are 4m long. In the narrow “D”-shaped operating platform space, it is not convenient to manually handle and erect the steel bars, which reduces the efficiency of steel bar splicing and installation.

[0009] The seventh method of rebar hoisting is the single-point vertical hoisting method. While it has advantages such as safety, reliability, high efficiency, and good protection of rebar threads, the flat-bottomed circular end of the hoisting device sleeve presents several drawbacks when unloading rebar inside the column. For example, if the rebar and hoisting device are placed vertically, the rebar's length and high center of gravity often cause it to tip over, injuring people or property, requiring manual repositioning and wasting manpower. Conversely, if the rebar and hoisting device are placed at an angle, the circular bottom of the sleeve can cause it to roll sideways, leading to rebar falling and injuring people or property. This method is not fully replicable for hoisting and splicing the main rebar of highly inclined cable-stayed tower columns. It is difficult to achieve the splicing and splicing of main rebar in highly inclined tower columns, requiring manual extraction and rotation of the rebar, which is not only time-consuming and labor-intensive but also carries the potential safety risks of rebar tipping over and the hoisting device rolling, causing injury or property damage.

[0010] The eighth method of steel bar hoisting is the single-point vertical hoisting method. While it has advantages such as preventing steel bars from falling during high-altitude hoisting operations, avoiding accidents caused by falling objects, and ensuring good protection of the steel bar threads, it also has drawbacks. Because the bottom of the steel bar hoisting assembly is square, when unloading the steel bars on the operating platform, if the steel bars and hoisting device are placed vertically, the steel bars are often too long and have a high center of gravity, causing them to tip over and injure people or property. This requires manual repositioning of the steel bars, wasting manpower. This hoisting method cannot be completely replicated for hoisting and splicing the main steel bars of large-inclined cable towers. It is difficult to achieve the splicing and splicing of main steel bars for large-inclined cable towers, requiring manual extraction and rotation of the steel bars, which is not only time-consuming and labor-intensive but also poses potential safety risks of steel bars tipping over and the hoisting device rolling, causing injury or property damage.

[0011] On the other hand, in complex working environments with confined construction spaces, steeply inclined cable towers, and densely packed rebar, the traditional methods for splicing and connecting the main rebars of cable tower columns include: tying connections, welding connections, and mechanical connections. Tying connections have the advantages of simple operation, low cost, and wide applicability, but they also have drawbacks such as lower strength, steel waste, low construction efficiency, and large space occupation. Welding connections have the advantages of high strength, good sealing, beautiful appearance, and high reliability, but they also have drawbacks such as high equipment and process requirements, high material requirements, difficult repair, high cost, and unsuitability for vertical welding in environments with dense rebar. Mechanical connections have the advantages of stable and reliable joint quality, simple operation, fast construction speed, no pollution, no fire hazard, and construction safety, but they also have the drawbacks of bulky extrusion equipment, which is not convenient for mechanical connection operations of rebars at high altitudes, in confined spaces, or under steeply inclined conditions.

[0012] The above-mentioned methods for hoisting and splicing reinforcing bars do not meet the requirements for hoisting and splicing the main reinforcing bars of the tower columns in complex working environments such as confined construction spaces, steeply inclined towers, and densely packed reinforcing bars. Summary of the Invention

[0013] This invention provides a method for hoisting and splicing the main reinforcing bars of a cable tower column in complex working environments, in order to solve the safety hazards of slippage and falling of reinforcing bars during high-altitude hoisting, bar tipping, and lateral tumbling of hoisting devices in confined construction spaces, which could cause injury to people and property; and the technical problems of low efficiency, high construction cost, and failure to meet the design requirements of Class I joints in splicing and connecting the main reinforcing bars of tower columns in highly inclined cable towers and densely arranged reinforcing bars working environments.

[0014] The technical solution adopted in this invention is as follows: A method for hoisting and extending the main reinforcing bars of a cable tower column under complex operating conditions includes the following steps: Design and fabrication: Designing and fabricating a reinforcing bar hoisting device and a reinforcing bar support device, and installing the fabricated reinforcing bar support device. The fabricated reinforcing bar hoisting device includes an end support cylinder and a hoisting rope assembly. One end of the end support cylinder is recessed along the axial direction to form an end mounting cavity. The outer surface of the end support cylinder also has a circumferentially arranged polyhedral support structure. The hoisting rope assembly is connected to the end support cylinder. The fabricated reinforcing bar support device is installed on the main reinforcing bars of the tower column or the climbing formwork, and the reinforcing bar support device has a locking slot for holding the upper end of the reinforcing bar bundle. Hoisting and support: The reinforcing bar bundle is hoisted to the top of the tower base or the support platform of the climbing formwork using the reinforcing bar hoisting device, and the reinforcing bar bundle is vertically inclined and supported in the locking slot of the reinforcing bar support device. Extension and installation: Using the reinforcing bar support device and the reinforcing bar jointing device, the reinforcing bar bundle is extended and connected to the pre-embedded main reinforcing bars of the tower column.

[0015] Furthermore, the "design and fabrication" step specifically includes the following steps: design and fabrication of the rebar hoisting device; design and fabrication of the rebar support device; and adjustment and installation of the rebar support device.

[0016] Furthermore, the step "Design and fabrication of rebar hoisting device" specifically includes the following steps: structural design of the rebar hoisting device; processing and fabrication; wherein, the end support cylinder of the fabricated rebar hoisting device also includes a hollow straight cylinder with both ends connected and hollow, and a multi-faceted hollow frustum fixedly connected to the end of the hollow straight cylinder; the multi-faceted hollow frustum includes a circular steel plate fixed to the end face of the hollow straight cylinder to close the end of the hollow straight cylinder, a circular steel rod fixed vertically to the center of the circular steel plate along the axial direction, and multiple polygonal steel plates arranged sequentially at intervals along the circumference of the circular steel rod; the inner sides of each polygonal steel plate are respectively fixedly connected to the circular steel plate and the circular steel rod, and the multiple polygonal steel plates form a multi-faceted support structure.

[0017] Furthermore, the end support cylinder of the manufactured rebar hoisting device also includes two lifting rings symmetrically connected to the two opposite outer walls of the hollow straight cylinder, with the center of the lifting hole of the lifting ring 30mm to 50mm from the outer wall of the hollow straight cylinder; the hoisting rope assembly of the manufactured rebar hoisting device includes a connecting rope and a sling wire rope; both ends of the connecting rope are detachably connected to the two lifting rings through a first shackle; one end of the sling wire rope is connected to the middle of the connecting rope through a first shackle, and the other end of the sling wire rope is used to connect to the hoisting equipment after being wrapped around the upper end of the rebar bundle.

[0018] Furthermore, the step "Design and fabrication of rebar support device" specifically includes the following steps: structural design of rebar support device; processing and fabrication; wherein, the fabricated rebar support device includes a telescopic support rod extending axially, and a support frame and a fixing frame connected to both ends of the support rod axially; the telescopic support rod is telescopically extended along its length and adjustable along its radial direction; the fixing frame is used for detachable fixing to the main rebar of the tower column or the climbing formwork; the support frame is provided with a locking slot.

[0019] Furthermore, the telescopic support rod includes two support rods spaced axially apart, an adjusting rod connected between the two support rods, and two sets of first connecting assemblies; the outer ends of the two support rods are respectively connected to the support frame and the fixing frame; the adjusting rod is a hollow cylindrical shape with both ends connected, and its inner diameter is larger than the outer diameter of the support rod. Several first adjusting holes are machined on the outer circle of the adjusting rod and penetrate the wall surface. Several second adjusting holes are provided on the inner ends of the two support rods respectively; the inner ends of the two support rods extend into the adjusting rod from both ends, and each is adjustablely fixed to the adjusting rod through a set of first connecting assemblies with the first and second adjusting holes.

[0020] Furthermore, the support frame includes a semi-ring-shaped semi-ring frame and a first connecting rod connecting to the outer wall of the semi-ring frame, with the opening of the semi-ring frame forming a snap-fit; the fixing frame includes a second shackle and a second connecting rod connecting to the outer wall of the second shackle; the fabricated steel reinforcement support device also includes two sets of second connecting components for connecting the support frame and the fixing frame to the two ends of the telescopic support rod respectively, the second connecting rod having the same structure as the first connecting rod, the first connecting rod including a fixing part fixed to the semi-ring frame and a connecting part connected to the fixing part and being rod-shaped; the outer end of the telescopic support rod is recessed to form a notch, the connecting part of the first connecting rod extends into the notch, and the second connecting component passes through the notch and the connecting part to adjustably connect the support frame and the telescopic support rod.

[0021] Furthermore, the step "lifting support" specifically includes the following steps: In the steel bar semi-finished product stacking area at the tower column construction site, neatly stack the two ends of steel bar bundles consisting of ten steel bars to be lifted; remove the threaded protective sleeves from the ends of the steel bar bundles to be lifted, insert the ends of the steel bar bundles to be lifted into the hollow straight cylinder of the steel bar lifting device, and abut against the multi-faceted hollow truncated cone at the bottom of the steel bar lifting device; at the other end of the steel bar bundle to be lifted, wrap the steel bar bundle with a lifting sling at least once, and connect the end of the lifting sling to the middle of the connecting rope using the first shackle; suspend the other end of the lifting sling inside the tower crane lifting equipment, and slowly lift the steel bar bundle. The initial hoisting state is horizontal → inclined → vertical; after lifting the rebar hoisting device and rebar bundle off the ground, pause and check whether the rebar hoisting device, the rebar bundle to be hoisted, the connecting rope and the sling wire rope are secure, and check whether the sling wire rope and the rebar bundle to be hoisted are tightly wrapped and tied. Only after confirming that everything is correct can the hoisting continue; hoist the rebar hoisting device and rebar bundle to the operating platform at the top of the tower base, and place them at an angle in the clamp of the rebar support device, so that the temporary placement angle of the rebar hoisting device and rebar bundle is close to the angle of inclination of the main rebar of the tower column; remove the first shackle between the sling wire rope and the connecting rope, and loosen the wrapping and binding between the sling wire rope and the rebar bundle to be hoisted.

[0022] Furthermore, the "extension installation" step specifically includes the following steps: Select one main steel bar from the outermost layer of pre-embedded main steel bars in the first section of the tower column, and install a straight threaded sleeve on its top. During the extension and connection installation, arrange for operators to open the steel bar joint connection device, with the sleeve hole end of the clamp plate facing down and the steel bar hole end facing up, and insert the straight threaded sleeve of the selected main steel bar into the sleeve hole of the steel bar joint connection device. Arrange for operators to insert the threaded end of one steel bar to be installed, which has been removed, into the steel bar hole of the steel bar joint connection device. The operator holding the steel bar joint connection device grips the operating handle and forcefully pulls it towards the center, thus completing the alignment of the first steel bar to be installed with the first main steel bar of the tower column, ensuring they are on the same straight line. Lock the steel bar joint connection device, and use an electric steel bar sleeve wrench to tighten the steel bar to be installed, ensuring that the extension and connection installation quality of the steel bar to be installed and the pre-embedded main steel bar of the tower column meets the requirements of the standard specifications.

[0023] Furthermore, before the step "extending installation", there is also the step of: extending and installing the tower column stiffening frame.

[0024] The present invention has the following beneficial effects: In the hoisting and splicing installation method of this invention, the end support cylinder of the designed and manufactured rebar hoisting device has an end mounting cavity for clamping the end of the rebar bundle. During hoisting, the bottom end of the rebar bundle to be hoisted is inserted into the end mounting cavity, which not only ensures that the rebar bundle to be hoisted is not easy to fall during hoisting, but also protects the threads (threads) at the end of the rebar bundle from being damaged by swaying during hoisting, effectively protecting the quality of the threads (threads) at the end of the rebar bundle to be hoisted. On the other hand, the outer surface of the end support cylinder also has a circumferentially arranged polyhedral support structure. Not only does the polyhedral support structure contact the ground, allowing the hoisting body assembled from the rebar hoisting device and the rebar bundle to be in an inclined state on the tower base or climbing formwork operating platform, so as to facilitate quick and convenient manual removal and splicing of the rebar to be installed; at the same time, the polyhedral support structure also provides stable contact with the ground, allowing the hoisting body to be in a vertical state in the air. This facilitates the safety confirmation of the rebar hoisting device and the rebar bundle before formal hoisting, and also facilitates the hoisting device and the rebar bundle on the operating platform. Temporary placement prevents tipping and injury to people or property, or sideways rolling and injury; the multi-faceted support structure at the bottom of the steel bar hoisting device ensures stable contact with the ground, preventing sideways rolling and injury. The hoisting device and steel bar bundles can be tilted in the air. Combined with the designed, manufactured, and installed steel bar support devices, the hoisting body is tilted and supported, facilitating quick and easy manual removal and splicing of the steel bars to be installed. This eliminates the need for manual pulling and erection of the steel bars, reducing labor intensity, shortening the splicing and splicing time, and improving installation efficiency.

[0025] In this invention, the coordinated use of a rebar hoisting device and a rebar support device not only prevents the rebar bundles to be hoisted from slipping and falling during high-altitude hoisting in confined construction spaces, thus avoiding injury to people and property, but also solves the safety hazards of rebar bundles to be hoisted tipping over or falling and injuring people and property in confined "D"-shaped operating platform spaces due to the conventional circular bottom of the rebar hoisting device, or due to the conventional square bottom of the rebar hoisting device and the excessive length and high center of gravity of the rebar bundles to be hoisted. This improves the quality of the inter-joint installation of the rebar to be installed with the pre-embedded main rebar of the tower column in inclined towers and densely rebar-laying operating environments, meeting the technical requirements of Class I joints, effectively reducing the labor cost of the entire tower column main rebar splicing installation, and shortening the overall tower column construction period.

[0026] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a flowchart of the method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions according to the present invention; Figure 2 This is a plan view of the tower columns and construction operation platform; Figure 3 This is an elevation view of the location where the main steel reinforcement bars of the tower column are hoisted. Figure 4 This is a schematic diagram of the spatial structure of the steel bar hoisting device of a preferred embodiment of the present invention for hoisting steel bar bundles to form a hoisting body; Figure 5 yes Figure 4 A schematic diagram of the main structure of the end support cylinder of the steel bar hoisting device; Figure 6 yes Figure 5 A schematic diagram of the spatial structure of a multi-faceted hollowed-out frustum. Figure 7 yes Figure 4 A schematic diagram of the main structure of the first shackle in the middle; Figure 8 This is a top view of the steel bar support device according to a preferred embodiment of the present invention; Figure 9 yes Figure 8 Schematic diagram of the cross-sectional structure along the middle I-I direction; Figure 10 yes Figure 8 Schematic diagram of the spatial structure of the central support rod; Figure 11 This is a schematic diagram of the main structure of the rebar splice assembly; Figure 12 yes Figure 11 A schematic diagram of the main structure of the clamping plate.

[0028] Legend: 1. Tower column stiffening frame; 2. Tower column main reinforcement; 3. Operating platform; 4. Reinforcement bundles; 5. Rebar hoisting device; 501. Hollow straight cylinder; 502. Multi-faceted hollowed-out frustum; 5021. Circular steel plate; 5022. Circular steel bar; 5023. Polygonal steel plate; 503. Hanging rings; 504, First shackle; 5041, Shackle body; 5042, Shackle hook; 5043, Movable pin; 505. Connecting rope; 506. Sling wire rope; 6. Reinforcing steel support device; 601, Support frame; 6011, Semi-ring frame; 6012, First connecting rod; 602, Fixing bracket; 6021, Second shackle; 6022, Second connecting rod; 603, Telescopic support rod; 6031, Support rod; 60311, Second adjustment hole; 6032, Adjustment rod; 60321, First adjustment hole; 604. First connecting component; 605. Second connecting component; 7. Rebar splice assembly device; 71. Clamp plate; 711. Rebar hole; 712. Sleeve hole; 75. Operating handle; 8. Lifting equipment; 9. Tower column concrete. Detailed Implementation

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0030] Reference Figure 1-4 and Figure 8 A preferred embodiment of the present invention provides a method for hoisting and extending the main reinforcing bars of a cable tower column in a complex operating environment, comprising the following steps: Design and fabrication: Design and fabricate the rebar hoisting device 5 and the rebar support device 6, and install the fabricated rebar support device 6. The fabricated rebar hoisting device 5 includes an end support cylinder and a hoisting rope assembly. One end of the end support cylinder is recessed along the axial direction to form an end mounting cavity. The outer surface of the end support cylinder also has a circumferentially arranged polyhedral support structure. The hoisting rope assembly is connected to the end support cylinder. The fabricated rebar support device 6 is installed on the main rebar 2 of the tower column or the climbing formwork, and the rebar support device 6 has a locking slot for holding the upper end of the rebar bundle 4. Lifting and support: The steel bar bundle 4 is lifted to the top of the tower base or the support platform of the climbing formwork using the steel bar lifting device 5, and the steel bar bundle 4 is vertically inclined and supported in the slot of the steel bar support device 6. Extension installation: Using the steel bar support device 6 and the steel bar joint connection device 7, the steel bar bundle 4 is extended and connected to the pre-embedded main steel bar 2 of the tower column.

[0031] In the hoisting and extension installation method of the present invention, the end support cylinder of the designed and manufactured steel bar hoisting device 5 has an end mounting cavity for clamping the end of the steel bar bundle 4. During hoisting, the bottom end of the steel bar bundle 4 to be hoisted is inserted into the end mounting cavity, which not only ensures that the steel bar bundle 4 to be hoisted is not easy to fall during hoisting, but also protects the threads (threads) at the end of the steel bar bundle 4 to be hoisted from being swayed and damaged during hoisting, effectively protecting the quality of the threads (threads) at the end of the steel bar bundle 4 to be hoisted. On the other hand, the outer surface of the end support cylinder also has a circumferentially arranged polyhedral support structure. This polyhedral support structure not only contacts the ground, allowing the hoisting body assembled from the rebar hoisting device 5 and the rebar bundle 4 to be tilted on the tower top or the operating platform 3 of the climbing formwork, facilitating quick and easy manual removal and splicing of the rebars to be installed; but also, through stable contact with the ground, the polyhedral support structure ensures the hoisting body remains vertical in the air. This facilitates both safety confirmation of the rebar hoisting device 5 and the rebar bundle 4 before formal hoisting and operation on the operating platform. 3. Temporarily placed on the ground to prevent tipping and injury to people or property, or rolling to the side and causing injury; the multi-faceted support structure at the bottom of the steel bar hoisting device 5 ensures stable contact with the ground and prevents rolling to the side and causing injury. The steel bar hoisting device 5 and the steel bar bundle 4 can be in an inclined state in the air. Combined with the steel bar support device 6 designed, manufactured and installed, the hoisting body is tilted and supported, which makes it easy for manual removal and splicing of the steel bars to be installed. This saves the amount of manual work of pulling out and erecting the steel bars to be installed, reduces the intensity of manual labor, shortens the splicing and splicing time of the steel bars to be installed, and improves the efficiency of splicing and splicing installation.

[0032] In this invention, the coordinated use of the steel bar hoisting device 5 and the steel bar support device 6 not only prevents the steel bar bundles to be hoisted from slipping and falling during high-altitude hoisting in confined construction spaces, thus avoiding injury to people and property, but also solves the safety hazards of the steel bar bundles to be hoisted falling and injuring people or property due to the conventional circular bottom end of the steel bar hoisting device 5 or the conventional square bottom end of the steel bar hoisting device 5 and the steel bar to be hoisted being too long and having a high center of gravity in confined "D"-shaped operating platform spaces. This improves the quality of the inter-joint installation of the steel bar to be installed and the pre-embedded main steel bar 2 of the tower column in the operation environment of steeply inclined cable towers and densely arranged steel bars, meeting the technical requirements of Class I joints, effectively reducing the labor cost of the entire cable tower column main steel bar 2 joint installation, and shortening the entire cable tower column construction period.

[0033] Optionally, a step "S1: Preliminary Preparations" is included before step "S2: Design and Production", as follows: 1. Preliminary construction preparation: According to the construction design drawings of the A-shaped cable tower column of pier 7 of a single-tower cable-stayed bridge in the Guangdong Delta Plain, the construction of the tower base reinforcement, tower column stiffening frame 1 and tower column main reinforcement 2 pre-embedded parts, lightning protection grounding pre-embedded parts, etc. were completed, and the tower base concrete was poured. 2. Grouting and sealing of cooling water pipe inlets: After the cooling water pipes in the tower base have stopped circulating water cooling and the concrete of the tower base has finished curing, grouting and sealing of the cooling water pipe inlets should be carried out in a timely manner. 3. Construct the tower column construction operation platform 3: On the hardened cement concrete road surface, construct the first section tower column construction operation platform 3. After the first section tower column concrete 9 has been cured, install the climbing formwork and construct the operation platform 3 on it.

[0034] Optionally, step "S2: Design and Production" specifically includes the following steps: S201: Design and fabrication of steel bar hoisting device 5; S202: Design and fabrication of steel reinforcement support device 6; S203: Adjustment and installation of steel reinforcement support device 6.

[0035] In this optional scheme, step "S201: Design and fabrication of rebar hoisting device 5" specifically includes the following steps: S2011: Structural Design of Rebar Lifting Device 5; S2012: Processing and manufacturing; Among them, such as Figure 5-6As shown, the end support cylinder of the manufactured rebar hoisting device 5 also includes a hollow straight cylinder 501 with both ends connected and hollow cylindrical, and a multi-faceted hollow frustum 502 fixedly connected to the end of the hollow straight cylinder 501; the multi-faceted hollow frustum 502 includes a circular steel plate 5021 fixed to the end face of the hollow straight cylinder 501 to close the end of the hollow straight cylinder 501, a circular steel rod 5022 fixed vertically along the axial direction to the center of the circular steel plate 5021, and a plurality of polygonal steel plates 5023 arranged sequentially at intervals along the circumference of the circular steel rod 5022; the inner side of each polygonal steel plate 5023 is fixedly connected to the circular steel plate 5021 and the circular steel rod 5022 respectively, and the plurality of polygonal steel plates 5023 form a multi-faceted support structure. In this optional scheme, the main functions of setting up the multi-faceted hollowed-out cone 502 in the steel bar hoisting device 5 are: (1) First, to strengthen the connection between the circular steel plate 5021 and the circular steel bar 5022, and increase the overall stability of the steel bar hoisting device 5; second, through the contact between the side slope of the multi-faceted hollowed-out cone 502 and the ground, the hoisting body can be in an inclined state on the operating platform 3 of the tower base or climbing formwork, so that it is convenient for manual labor to quickly and easily take out and extend the steel bar to be installed. (2) Through the stable contact between the side slope of the multi-faceted hollowed-out cone 502 at the bottom of the steel bar hoisting device 5 and the ground without causing lateral rolling and injury, the steel bar hoisting device 5 and the steel bar to be installed can be in an inclined state in the air. Combined with the function of the steel bar support device 6, the hoisting body is tilted and supported, so that it is convenient for manual labor to quickly and easily take out and extend the steel bar to be installed, saving the amount of manual labor to pull out and erect the steel bar to be installed, reducing the labor intensity of manual labor, shortening the extension and connection installation time of the steel bar to be installed, and improving the extension and connection installation efficiency. In addition, during the hoisting operation, the bottom end of the steel bar bundle 4 to be hoisted is inserted into the hollow straight cylinder 501 and abuts against the end face of the multi-faceted hollow cone 502 to ensure that the steel bar bundle 4 to be hoisted does not fall during hoisting. At the same time, it protects the threads (threads) at the end of the steel bar bundle 4 from being swayed and damaged during hoisting, effectively protecting the quality of the threads (threads) at the end of the steel bar bundle 4 to be hoisted.

[0036] In specific embodiments of this optional solution, such as Figure 6As shown, the polygonal steel plate 5023 is a pentagonal steel plate, including long and short edges spaced parallel to each other axially, long and short straight edges spaced parallel to each other radially and perpendicularly connected to the long and short edges at both ends, and a long inclined side connecting the short straight edge and the short edge. The long edges are fixed to the circular steel plate 5021 and extend radially along the circular steel plate 5021, while the short edges are flush with the top of the circular steel rod 5022 and extend radially along the circular steel rod 5022. The long straight edge is fixed axially to the outer wall surface of the circular steel rod 5022. During hoisting, the small end face of the hollowed-out polygonal structure of the multi-faceted hollowed-out cone-shaped body 502 at the bottom of the steel bar hoisting device 5 is in stable contact with the ground, which can keep the hoisting body in a vertical state in the air. This is convenient for the safety confirmation of the steel bar hoisting device 5 and the steel bar bundle 4 to be hoisted before the formal hoisting, and also convenient for the steel bar hoisting device 5 and the steel bar bundle 4 to be hoisted to be temporarily placed on the operating platform 3, so as to prevent tipping over and causing injury or damage to objects, or rolling to the side and side and causing injury.

[0037] The function of setting the pentagonal steel plate in the multifaceted hollow frustum 502: ① When the polygonal steel plate 5023 is pentagonal, it is welded to the circular steel plate 5021 and the circular steel bar 5022 to form a multi-faceted hollowed-out frustum 502 with one end being a hollowed-out hexagonal (or hollowed-out circular) small end face, the middle part being a hollowed-out hexagonal frustum, and the other end being a hollowed-out cylinder. This not only increases the bearing area at the hollowed-out hexagonal (or hollowed-out circular) end of the circular steel bar 5022, enabling it to withstand the weight of the steel bar hoisting device 5 and the steel bar bundle 4 to be hoisted, but also ensures that when the side slope of the hollowed-out hexagonal frustum contacts the ground, the long inclined steel plates on both sides of the side slope of the hollowed-out hexagonal frustum serve as supporting force-bearing sides, making the support of the steel bar hoisting device 5 and the steel bar bundle 4 more stable, preventing them from swaying or rolling and causing injury or damage.

[0038] ② A short straight edge is set on the hypotenuse of the polygonal steel plate 5023. After being welded with the circular steel plate 5021 and the circular steel bar 5022, a hollow cylinder is formed. A hollow hexagon (or hollow circle) is formed at the intersection of the short straight edge and the long hypotenuse. This mainly serves to transition from the solid cylinder at the end of the circular steel plate to the hollow hexagonal truncated cone, preventing the solid cylinder from rolling easily. When the side slope of the hollow hexagonal truncated cone contacts the ground, the long hypotenuse steel plates on both sides of the side slope of the hollow hexagonal truncated cone act as supporting force sides, making the support of the steel bar hoisting device 5 and the steel bar bundle 4 to be hoisted more stable, preventing them from swaying or rolling and causing injury to people or property.

[0039] ③ When the polygonal steel plate 5023 is quadrilateral, it is welded to the circular steel plate 5021 and the circular steel bar 5022 to form a multi-faceted hollowed-out frustum 502 with one end being a hollowed-out hexagonal (or hollowed-out circular) small end face, the middle part being a hollowed-out hexagonal frustum, and the other end being a circular steel plate solid cylinder with a circular end face. At the hollowed-out hexagonal (or hollowed-out circular) end of the circular steel bar, although the bearing area is increased to withstand the weight of the steel bar hoisting device 5 and the steel bar bundle 4 to be hoisted, when the side slope of the hollowed-out hexagonal frustum contacts the ground, the hollowed-out hexagonal (or hollowed-out circular) end of the circular steel bar serves as the support point, while the solid circular end of the circular steel plate is prone to rolling, causing the steel bar hoisting device 5 and the steel bar bundle 4 to be hoisted to sway sideways, resulting in injury to people and property.

[0040] ④ When the polygonal steel plate 5023 is triangular, it is welded to the circular steel plate 5021 and the circular steel bar 5022 to form a multi-faceted hollowed-out truncated cone 502, with one end being the round end face of a circular steel bar, the middle being a hollowed-out six-sided truncated cone, and the other end being the round end face of a solid cylindrical circular steel plate. When the inclined side of the hollowed-out six-sided truncated cone contacts the ground, the circular steel bar end and the solid cylindrical end of the circular steel plate, being solid circles at both ends, are prone to rolling, which can easily cause the rebar hoisting device 5 and the rebar bundle 4 to be hoisted to roll sideways, causing injury or damage to people and property. When the circular end face of the circular steel bar contacts the ground, the small bearing area of ​​the circular end face cannot withstand the weight of the heavier rebar hoisting device 5 and the rebar bundle 4 to be hoisted, thus damaging the rebar hoisting device 5.

[0041] In this optional solution, such as Figure 5 As shown, the end support cylinder of the fabricated steel bar hoisting device 5 also includes two lifting rings 503 symmetrically connected to the two opposite outer walls of the hollow straight cylinder 501. The center of the lifting hole of the lifting ring 503 is 30mm to 50mm away from the outer wall of the hollow straight cylinder 501. Further, as... Figure 4 and Figure 7 As shown, the lifting rope assembly of the manufactured rebar hoisting device 5 includes a connecting rope 505 and a sling wire rope 506; both ends of the connecting rope 505 are detachably connected to two lifting rings 503 via first shackles 504; one end of the sling wire rope 506 is connected to the middle of the connecting rope 505 via the first shackle 504, and the other end of the sling wire rope 506 is used to connect to the lifting equipment 8 after being wrapped around the upper end of the rebar bundle 4. In this optional scheme, such as Figure 7 As shown, the first shackle 504 consists of a shackle body 5041, a shackle hook 5042, and a movable pin 5043. The shackle body 5041 is made of high-strength alloy steel, stainless steel, or aluminum alloy, the shackle hook 5042 is a D-shaped shackle, and the movable pin 5043 is a spiral pin.

[0042] In this optional scheme, the lifting rings 503 on both sides of the hollow cylinder 501 form a symmetrical cantilevered lifting point force-bearing structure fixed on both sides of the steel bar lifting device 5. Its functions are: firstly, to facilitate the installation and removal of the first shackle 504 connecting the connecting rope 505 and the steel bar lifting device 5 during the lifting of the steel bar bundle 4, preventing damage to the steel bar bundle 4; secondly, compared with the two-point lifting method fixed close to the outer wall of the hollow cylinder 501, in a horizontal two-point lifting system, increasing the distance between the two lifting points reduces the horizontal angle between the connecting rope 505 and the steel bar lifting device 5, ensuring that the horizontal angle meets the requirements of the "Safety Technical Specification for Lifting and Hoisting Engineering in Building Construction" (JGJ276): within the range of 45° to 60°; it can distribute the load, reduce single-point stress, thereby improving overall stability; and it can make the stress on the lifting points more uniform, avoiding excessive stress on some lifting points that could damage the steel bar lifting device 5, leading to the steel bar bundle 4 falling from a height and causing injury.

[0043] In this optional solution, the specific operation of step "S2012: Processing and Manufacturing" is as follows: (1) Hollow straight cylinder 501: It is made of seamless steel pipe with an outer diameter of 168mm and a wall thickness of 10mm. Its quality meets the requirements of the standard "Seamless Steel Pipes for Fluid Transportation" (GB / T 8163). Both ends of the hollow straight cylinder 501 are open end faces. When hoisting the steel bar bundle 4 to be hoisted, one end of the steel bar bundle 4 consisting of 10 steel bars to be hoisted is inserted into the hollow straight cylinder 501. The length of the hollow straight cylinder 501 is 250mm. If the length of the hollow straight cylinder 501 is too short, it is not conducive to protecting the threads (thread buds) at the end of the steel bar bundle 4 to be hoisted. If the length of the hollow straight cylinder 501 is too long, it is not convenient for manual quick removal of the steel bars to be installed.

[0044] (2) Multi-faceted hollowed-out frustum 502: such as Figure 7 As shown, it is welded from a circular steel plate 5021, a circular steel bar 5022, and a pentagonal steel plate 5023. Specifically: the circular steel plate 5021 is made of stainless steel plate with a thickness of 10mm and a diameter of 168mm; the circular steel bar 5022 is made of steel bar with a length of 286mm and a diameter of 50mm; and the pentagonal steel plate 5023 is made of stainless steel plate with a thickness of 10mm, a top edge width of 20mm, a bottom edge width of 59mm (i.e., the distance between the outer wall of the circular steel bar 5022 and the outer edge of the circular steel plate 5021), a height of 286mm, and a short straight edge of 30mm on the hypotenuse. The diameter of the circular steel plate 5021 is the same as the outer diameter of the hollow straight cylinder 501.

[0045] During welding, a circular steel rod 5022 is vertically welded to the center of the circular steel plate 5021. Six polygonal steel plates 5023 are then evenly welded to the outer wall of the circular steel rod 5022. The specific steps are as follows: the long hypotenuse and short straight sides of the polygonal steel plates 5023 are welded tightly to the outer wall of the circular steel rod 5022; the long hypotenuse and short straight sides of the polygonal steel plates 5023 are positioned away from the circular steel rod 5022; the bottom edge of the polygonal steel plates 5023 is positioned tightly against the surface of the circular steel plate 5021; and the top edge of the polygonal steel plates 5023 is positioned away from the circular steel plate 5021. After welding, a multi-faceted hollow frustum 502 is formed.

[0046] (3) Lifting ring 503: A semi-circular steel plate with a diameter of 180mm is made of 10mm thick stainless steel plate, and a φ40mm round hole is drilled at the center of the surface of the semi-circular steel plate to form the lifting ring 503, which is used to install the first shackle 504 during hoisting. The quality of the steel plate meets the requirements of the standard "Carbon Structural Steel" (GB / T700).

[0047] (4) First shackle 504: Composed of shackle body 5041, shackle hook 5042, and movable pin 5043. Shackle body 5041 is made of high-strength alloy steel, stainless steel, or aluminum alloy; shackle hook 5042 is a D-shaped shackle; and movable pin 5043 is a spiral pin. The quality of the shackle meets the requirements of the standard "D-shaped and bow-shaped forged shackles for general lifting" (GB / T25854). The first shackle 504 in this application adopts the national standard D2 type 5T first shackle 504, which can be directly purchased from the market.

[0048] (5) Connecting rope 505 and sling wire rope 506: Connecting rope 505 is a 6×37(b)-1670 grade steel wire rope with a length of 6m and a φ22mm, with insert-braided loopless ties; sling wire rope 506 is a 6×37(b)-1670 grade steel wire rope with a length of 8m and a φ22mm, with insert-braided loopless ties. The minimum distance between the ends of the insert-braided parts of the ties at both ends of connecting rope 505 and sling wire rope 506 is 20 times the diameter of the steel wire rope (i.e., 440mm). The quality of the steel wire rope meets the requirements of the standards "General Technical Conditions for Steel Wire Ropes" (GB / T20118) and "Inserted Clasps for Steel Wire Ropes and Slings" (GB / T16271). The steel wire rope can be purchased directly from the market.

[0049] In this optional solution, step "S202: Design and fabrication of rebar support device 6" specifically includes the following steps: S2021: Structural Design of Reinforcing Steel Support Device 6; S2022: Processing and manufacturing; Among them, such as Figure 8As shown, the manufactured steel reinforcement support device 6 includes a telescopic support rod 603 extending axially, and a support frame 601 and a fixing frame 602 connected to both ends of the support rod 6031 in the axial direction; the telescopic support rod 603 is telescopically extended along its length and adjustable along its radial direction; the fixing frame 602 is used for detachable fixing to the main steel reinforcement 2 of the tower column or the climbing formwork; the support frame 601 is provided with a locking slot.

[0050] Furthermore, such as Figure 8 and Figure 10 As shown, the telescopic support rod 603 includes two support rods 6031 arranged axially spaced apart, an adjusting rod 6032 connected between the two support rods 6031, and two sets of first connecting assemblies 604. The outer ends of the two support rods 6031 are respectively connected to the support frame 601 and the fixing frame 602. The adjusting rod 6032 is a hollow cylindrical shape with both ends connected. Its inner diameter is larger than the outer diameter of the support rod 6031. The outer circle of the adjusting rod 6032 is machined with a plurality of first adjusting holes 60321 that penetrate the wall surface. The inner ends of the two support rods 6031 are each provided with a plurality of second adjusting holes 60311 that penetrate the wall surface. The inner ends of the two support rods 6031 extend into the adjusting rod 6032 from both ends of the adjusting rod 6032, and are respectively adjusted and fixed to the adjusting rod 6032 through a set of first connecting assemblies 604 that pass through the first adjusting holes 60321 and the second adjusting holes 60311.

[0051] In use, the axial position between the second adjustment hole 60311 of the support rod 6031 and the first adjustment hole 60321 of the adjustment rod 6032 in the telescopic support rod 603 is adjusted to lengthen the telescopic support rod 603, thereby adjusting the distance between the support frame 601 and the fixed frame 602. This, in turn, adjusts the tilt angle of the temporarily placed steel bar hoisting device 5 and the steel bar to be installed on the operating platform 3 to be close to the tilt angle of the main steel bar 2 of the tower column. On the other hand, by adjusting the radial position between the second adjustment hole 60311 of the support rod 6031 and the first adjustment hole 60321 of the adjustment rod 6032 in the telescopic support rod 603, different radial angles of the support frame 601 or the fixed frame 602 are adjusted, thereby achieving horizontal or vertical fixed installation of the adjustable steel bar support device 6. In this optional scheme, the cooperation between the steel bar support device 6 and the steel bar hoisting device 5 makes the inclination angle of the steel bar hoisting device 5 and the steel bar to be installed close to the inclination angle of the main steel bar 2 of the tower column. This makes it easier for manual labor to quickly and conveniently remove and connect the steel bar to be installed, eliminating the workload of manually pulling out and erecting the steel bar to be installed, reducing the intensity of manual labor, shortening the time for connecting the steel bar to be installed, and improving the efficiency of connecting the steel bar to be installed.

[0052] Optionally, such as Figure 8-10As shown, the support frame 601 includes a semi-ring-shaped semi-ring frame 6011 and a first connecting rod 6012 connecting the outer wall of the semi-ring frame 6011. The opening of the semi-ring frame 6011 forms a snap-fit. The fixing frame 602 includes a second shackle 6021 and a second connecting rod 6022 connecting the outer wall of the second shackle 6021. The fabricated steel bar support device 6 also includes two sets of second connecting components 605 for connecting the support frame 601 and the fixing frame 602 to the two ends of the telescopic support rod 603, respectively. The second connecting rod 6022 has the same structure as the first connecting rod 6012. The first connecting rod 6012 includes a fixing part that is fixed to the semi-ring frame 6011 and a connecting part that is rod-shaped and connects to the fixing part. The outer end of the telescopic support rod 603 is recessed to form a notch. The connecting part of the first connecting rod 6012 extends into the notch. After the second connecting component 605 passes through the notch and the connecting part, it adjustably connects the support frame 601 and the telescopic support rod 603. In this optional solution, the first connecting component 604 and the second connecting component 605 have the same structure, both including connecting bolts, lock nuts, and washers. In use, by loosening the lock nut of the second connecting component 605 between the telescopic support rod 603 and the support frame 601, the support frame 601 is adjusted upwards and downwards to the required angle, and then the lock nut is tightened to adjust the elevation angle of the support frame 601. Similarly, by loosening the lock nut between the telescopic support rod 603 and the fixed frame 602, the fixed frame 602 is adjusted upwards and downwards to the required angle, and then the lock nut is tightened to adjust the elevation angle of the fixed frame 602. This, in turn, adjusts the supported tilt angle of the temporarily placed hoisting body on the operating platform 3 to be close to the tilt angle of the main steel reinforcement 2 of the tower column.

[0053] In this optional solution, the specific operation of step "S2022: Processing and Manufacturing" is as follows: (1) Support frame 601: such as Figure 8 As shown, the support frame 601 consists of a semi-ring frame 6011 and a first connecting rod 6012. The semi-ring frame 6011 is made by cold bending a 471mm long, 20mm φ round steel bar into a 300mm diameter semi-circular ring; the first connecting rod 6012 is made of a 60mm long, 20mm φ round steel bar. At any end of the first connecting rod 6012, within 30mm of the end face, a handheld cutting machine is used to cut off the arc blocks on both sides of the circular steel bar's axis, creating a "protrusion" on the end face. A 10mm φ connecting hole is drilled vertically at the center of the protrusion's plane, and the right angle of the protrusion is ground into a rounded arc to facilitate the adjustment of the support frame 601's upward and downward tilt angles. The other end of the first connecting rod 6012 is horizontally welded to the outer side of the middle position of the semi-ring frame 6011. After welding, the opening surface of the protrusion on the first connecting rod 6012 is perpendicular to the plane of the semi-ring frame 6011.

[0054] (2) Fixture 602: such as Figure 8As shown, the fixing frame 602 consists of a second shackle 6021 and a second connecting rod 6022. If the fixing frame 602 is fixed to the Φ40mm main steel bar 2 on the outside of the tower column, the second shackle 6021 uses a national standard D2 type 5T shackle; if the fixing frame 602 is fixed to a square object on the climbing formwork, the second shackle 6021 uses a national standard D type shackle, the specific dimensions of which are determined according to the size of the square object; the second shackle 6021 can be purchased directly from the market. The second connecting rod 6022 is a 60mm long, φ20mm round steel bar. Within 30mm of the end face of any end of the second connecting rod 6022, use a handheld cutting machine to cut off the arc blocks on both sides of the centerline of the round steel bar, forming a "protrusion" on the end face; drill a φ10mm connecting hole vertically at the center of the protrusion plane, and grind the right angle of the protrusion into a rounded arc to facilitate the adjustment of the upward and downward tilt angle of the fixing frame 602. The other end of the second connecting rod 6022 is horizontally welded to the outer side of the middle position of the second shackle 6021. After welding, the protrusion opening surface on the second connecting rod 6022 is perpendicular to the plane of the second shackle 6021.

[0055] (3) Telescopic support rod 603: such as Figure 8-10 As shown, the telescopic support rod 603 consists of a support rod 6031 and an adjusting rod 6032. The support rod 6031 is made of two seamless steel pipes, each 165mm long, 20mm in outer diameter, and 4mm thick. The adjusting rod 6032 is made of one seamless steel pipe, each 210mm long, 30mm in outer diameter, and 4mm thick. The quality of both the support rod 6031 and the adjusting rod 6032 meets the requirements of the standard "Seamless Steel Pipes for Fluid Transportation" (GB / T 8163).

[0056] 1) Support rod 6031: As shown in 8-10, within a 30mm range from any end of the support rod 6031, use a handheld cutting machine to cut a groove on the end face of the arc block along the axis of the steel pipe. The groove should be 30mm deep and slightly wider than the width of the protrusion on the first connecting rod 6012 or the second connecting rod 6022 (e.g., ...). Figure 9 (As shown), so that the "protrusion" on the first connecting rod 6012 or the second connecting rod 6022 can rotate freely up and down in the "recess" of the support rod 6031 to adjust the pitch angle of the support frame 601 or the fixing frame 602. A φ10mm connecting hole is drilled perpendicularly to the "recess" at the center of the "recess" of the support rod 6031. Starting 20mm from the end face at the other end of the support rod 6031, four rows of second adjustment holes 60311 with a spacing of 15mm and a diameter of 8mm are drilled from the end towards the center. At each row of second adjustment holes 60311, second adjustment holes 60311 with a spacing of 15mm and a diameter of 8mm are drilled radially (e.g., ...). Figure 10 (As shown).

[0057] 2) Adjusting rod 6032: such as Figure 8 As shown, starting from the center of the adjusting rod 6032, 20mm away from the center line on both sides, five rows of first adjusting holes 60321 with a spacing of 15mm and a diameter of 8mm are drilled from the center to both ends. At the position of the first adjusting hole 60321 in each row, first adjusting holes 60321 with a spacing of 15mm and a diameter of 8mm are drilled radially.

[0058] (4) Second connecting component 605: such as Figure 8-10 As shown, the second connecting component 605 between the first connecting rod 6012 and the support rod 6031, and between the second connecting rod 6022 and the support rod 6031, uses M10 bolts, nuts, and washers; the second connecting component 605 between the support rod 6031 and the adjusting rod 6032 uses M8 bolts, nuts, and washers. Both can be purchased directly from the market.

[0059] Optionally, the specific operation of step "S203: Adjustment and installation of rebar support device 6" is as follows: 1. The telescopic support rod 603 is extended and adjustable. (For example...) Figure 8-10 As shown, align the first row of second adjustment holes 60311 on the support rod 6031 with the second row of first adjustment holes 60321 on the adjustment rod 6032 from the center outwards. Insert M8 bolts into the second row of first adjustment holes 60321 on the adjustment rod 6032 and the corresponding second row of second adjustment holes 60311 on the support rod 6031. Add washers to the other side of the bolts and tighten the nuts. Align the first row of second adjustment holes 60311 on the support rod 6031 with the third row of first adjustment holes 60321 on the adjustment rod 6032 from the center outwards. Insert M8 bolts into the third row of first adjustment holes 60321 on the adjustment rod 6032 and the corresponding second row of second adjustment holes 60311 on the support rod 6031. Add washers to the other side of the bolts and tighten the nuts. Continue this process... to complete the extension adjustment of the telescopic support rod 603.

[0060] 2. Adjustment of the vertical tilt angle of the steel reinforcement support device 6. (e.g.) Figure 8-10 As shown, loosen the connecting nut between the telescopic support rod 603 and the support frame 601, adjust the support frame 601 upwards and downwards to the required angle, and then tighten the nut to complete the upward and downward tilt angle adjustment of the support frame 601. Loosen the connecting nut between the telescopic support rod 603 and the fixed frame 602, adjust the fixed frame 602 upwards and downwards to the required angle, and then tighten the nut to complete the upward and downward tilt angle adjustment of the fixed frame 602.

[0061] 3. Radial adjustment of the fixing frame 602 at different angles. When the fixing frame 602 in the steel reinforcement support device 6 is fixed on the Φ40mm main steel bar 2 of the tower column on the outside of the tower column, the fixing frame 602 needs to be installed horizontally; when the fixing frame 602 in the steel reinforcement support device 6 is fixed on the horizontal square object of the climbing formwork, the fixing frame 602 needs to be installed vertically.

[0062] Operating method for adjusting the radial angle of the fixed frame 602: Unscrew the connecting nut between the support rod 6031 and the adjusting rod 6032 in the telescopic support rod 603, and remove the bolt; after rotating the fixed frame 602 radially by different angles, make the second adjusting hole 60311 on the support rod 6031 correspond to the first adjusting hole 60321 on the adjusting rod 6032, insert the M8 bolt rod, add a washer on the other side of the bolt and tighten the nut to complete the radial angle adjustment of the fixed frame 602.

[0063] 4. Radial angle adjustment of support frame 601. Unscrew the connecting nut between support rod 6031 and adjusting rod 6032 in telescopic support rod 603, and remove the bolt; after rotating support frame 601 radially by different angles, make the second adjusting hole 60311 on support rod 6031 correspond to the first adjusting hole 60321 on adjusting rod 6032, insert the M8 bolt rod, add a washer on the other side of the bolt and tighten the nut to complete the radial angle adjustment of support frame 601.

[0064] Optionally, this application takes the hoisting and splicing installation of the main reinforcing steel bar 2 of the first segment (4m per segment) of the lower right tower column of the A-shaped pylon of pier 7 of a single-tower cable-stayed bridge in the Guangdong Delta Plain as an example. Figure 2 , Figure 3 As shown, according to the construction design drawings and construction plan of the A-shaped pylon of pier 7 of this cable-stayed bridge, the pylon column is divided into 33 segments (two pylon columns on the left and right sides, totaling 66 segments) for construction, with a standard vertical pouring height of 3.9m. The outer layer of the main reinforcing bars 2 in each segment consists of 634 HRB500E steel bars with a diameter of 40mm; the inner layer consists of 159 HRB400E steel bars with a diameter of 32mm, and the main reinforcing bars 2 are densely arranged. All long-distance butt joints between the main reinforcing bars 2 in each segment are connected mechanically. The inward tilt rate of the lower pylon column is 1 / 6.57, and the outward tilt rate is 1 / 4.53. The corresponding inward tilt rate of the reinforcing bars in the lower pylon column is 1 / 6.57, and the corresponding outward tilt rate is 1 / 4.53. In this application, for clarity, the tilt rate is often referred to as the tilt angle, i.e., the tilt angle.

[0065] Optionally, step "S4: Lifting the Support" specifically includes the following steps: In the steel bar semi-finished product stacking area at the tower column construction site, steel bar bundles 4, consisting of ten steel bars to be hoisted, are neatly stacked at both ends. Remove the threaded protective sleeves from the ends of the steel bar bundle 4 to be hoisted, and insert the ends of the steel bar bundle 4 into the hollow straight cylinder 501 of the steel bar hoisting device 5, and abut against the multi-faceted hollow cone 502 at the bottom of the steel bar hoisting device 5. At the other end of the steel bar bundle 4 to be hoisted, after wrapping the steel bar bundle 4 with the sling wire rope 506 at least one turn, connect the end of the sling wire rope 506 to the middle position of the connecting rope 505 with the first shackle 504. The other end of the sling wire rope 506 is suspended inside the tower crane lifting equipment 8, and the steel bar bundle 4 is slowly lifted into the initial lifting state of: horizontal → tilted → vertical. After lifting the steel bar hoisting device 5 and the steel bar bundle 4 off the ground, pause and check whether the steel bar hoisting device 5, the steel bar bundle 4 to be hoisted, the connecting rope 505 and the sling wire rope 506 are secure. Check whether the sling wire rope 506 and the steel bar bundle 4 to be hoisted are tightly wrapped and tied. Only after confirming that everything is correct can the hoisting continue. The steel bar hoisting device 5 and the steel bar bundle 4 are hoisted to the top of the tower base or the climbing formwork operating platform 3, and placed at an angle in the slot of the steel bar support device 6, so that the temporary placement angle of the steel bar hoisting device 5 and the steel bar bundle 4 is close to the angle of inclination of the main steel bar 2 of the tower column. Remove the first shackle 504 between the sling wire rope 506 and the connecting rope 505, and loosen the entanglement and binding between the sling wire rope 506 and the bundle of steel bars 4 to be lifted.

[0066] Optionally, the overall operation steps for splicing and butt-connecting the reinforcing bars to be installed with the pre-embedded main reinforcing bars 2 of the tower column are as follows: (1) At the top of the main reinforcing bar 2 of the first segment of the tower column, which is 1.50m to 2.50m above the top surface of the tower base, the reinforcing bar to be installed is extended and butted. After the first segment of the tower column concrete 9 is completed, at the top of the main reinforcing bar 2 of the second segment of the tower column, which is 1.50m to 2.50m above the top surface of the first segment of the tower column concrete 9, the reinforcing bar to be installed is extended and butted. After the second segment of the tower column concrete 9 is completed, at the top of the main reinforcing bar 2 of the third segment of the tower column, which is 1.50m to 2.50m above the top surface of the second segment of the tower column concrete 9, the reinforcing bar to be installed is extended and butted. Following the above method, the reinforcing bars to be installed in the fourth segment, the fifth segment, ... the 33rd segment are extended and butted together with the main reinforcing bar 2 of the tower column. After the 33rd segment of the tower column concrete 9 is completed, the construction of the entire tower column is completed.

[0067] Taking the splicing and butt joint installation of the first section of reinforcing steel to be installed with the pre-embedded main reinforcing steel bar 2 of the tower column as an example, the specific operation of the "splitting and installation" step is as follows: In the outermost layer of the first section of the tower column, select any one of the main steel bars 2 and install a straight threaded sleeve on its top. During the splicing and installation, the operator is instructed to open the rebar joint splicing device 7, with the sleeve hole 712 end of the clamp plate 71 facing down and the rebar hole 711 end facing up, and insert the straight threaded sleeve of the selected tower column main rebar 2 into the sleeve hole 712 of the rebar joint splicing device 7. The operator is instructed to insert the threaded end of one of the removed steel bars into the steel bar hole 711 of the steel bar joint device 7; The operator holding the rebar joint device 7 grasps the operating handle 75 and forces it towards the center, thus completing the alignment of the first rebar to be installed with the first main rebar of the tower column 2, ensuring they are on the same straight line. The rebar joint device 7 is then locked, and the rebar to be installed is tightened using an electric rebar sleeve wrench, ensuring that the quality of the joint installation of the rebar to be installed and the pre-embedded main rebar of the tower column 2 meets the requirements of the standard specifications.

[0068] Following the above method, the splicing and connection installation between the 2nd, 3rd, ..., nth reinforcing bars to be installed and the 2nd, 3rd, ..., nth pre-embedded main reinforcing bars 2 of the tower column is completed in sequence; similarly, following the above method, the splicing and connection installation between the reinforcing bars to be installed on the center side of the first section of the tower column and the pre-embedded main reinforcing bars 2 of the tower column is completed, that is, the splicing and connection installation between the reinforcing bars to be installed on the first section of the tower column and the pre-embedded main reinforcing bars 2 of the tower column is completed.

[0069] Optionally, before step "S5: Extension Installation", the following steps are also included: S5: The tower column stiffening frame 1 is extended and installed. The specific operation is as follows: Figure 3 As shown, at the top of the first segment of the pre-embedded tower column stiffening frame 1, which protrudes 1.60m from the top surface of the tower base, the first segment of the tower column stiffening frame 1 is extended and installed, extending 1.60m into the second segment of the tower column, ensuring that the inclination angle of the first segment of the tower column stiffening frame 1 is consistent with the inclination angle of the lower tower column reinforcement. At the top of the second segment of the pre-embedded tower column stiffening frame 1, the second segment of the tower column stiffening frame 1 is extended and installed, extending 1.60m into the third segment of the tower column, ensuring that the inclination angle of the second segment of the tower column stiffening frame 1 is consistent with the inclination angle of the lower tower column reinforcement. This process is repeated for the remaining segments of the tower column stiffening frame 1. The inclination angle of all segments of the tower column stiffening frame 1 is consistent with the inclination angle of the entire tower column.

[0070] Furthermore, during the installation of each tower column segment, the pre-embedded tower column stiffening frame 1 of the previous segment is first extended and connected to the top of the exposed top of the pre-embedded tower column stiffening frame 1 of the previous segment, and then the main reinforcing steel bar 2 of the tower column of the previous segment is extended and connected to the top of the exposed top of the tower column main reinforcing steel bar 2 of the previous segment, and finally the concrete 9 of the tower column of the next segment is poured on top of the concrete 9 of the tower column of the previous segment, and so on, until the construction of the 33rd tower column segment is completed.

[0071] The synergistic effect of the tower column rebar transfer system of this invention in conjunction with the tower column main rebar hoisting and splicing installation method under complex operating environments is as follows: The method for hoisting and splicing main reinforcing bars of cable-stayed bridge towers under complex operating conditions described in this application, through the coordinated use of the reinforcing bar hoisting device 5, the reinforcing bar support device 6, and the reinforcing bar splicing device 7, has been implemented and verified in the splicing and splicing installation of the main reinforcing bars 2 of the A-shaped cable-stayed bridge tower column at pier 7 of this cable-stayed bridge. Compared with existing methods for hoisting and splicing reinforcing bars, the following overall synergistic technical effects can be achieved: 1. Quality: The technical solution of this application, through the coordinated use of the rebar hoisting device 5 and the rebar support device 6, not only protects the quality of the threads (threads) at the ends of the rebar to be installed, but also improves the quality of the long-distance joint installation of the rebar to be installed and the pre-embedded main rebar 2 of the tower column in the working environment of steeply inclined cable towers and densely arranged rebars, by coordinating the use of the rebar support device 6 and the rebar joint connection device 7. It meets the technical requirements of Class I joints and solves the technical problem of poor installation quality of the long-distance joint installation of the main rebar 2 of the tower column in the working environment of steeply inclined cable towers and densely arranged rebars.

[0072] In the verification of the splicing and butt joint installation of the main reinforcing bars of the A-shaped pylon column at pier 7 of this cable-stayed bridge, the sampling method and frequency specified in the "Technical Specification for Mechanical Connection of Reinforcing Bars" (JGJ107-2016) were followed: (1) At the main steel bar joint 2 of the tower column that has been extended and installed on the outside of the first section of the lower tower column, two sets of steel bar mechanical connection joints with a length of 550mm, HRB500E and a diameter of 40mm were randomly cut. After testing, their tensile strength was measured to be 690MPa, 688MPa, 699MPa and 723MPa, 719MPa, 724MPa, which all meet the technical requirements of Class I joints in the "Technical Specification for Mechanical Connection of Steel Bars" (JGJ107-2016).

[0073] (2) At the joint of the main steel bar 2 of the tower column that has been extended and installed on the center side of the first section of the lower tower column, a set of steel bar mechanical connection joints with a length of 550mm, HRB400E and a diameter of 32mm were randomly cut. After testing, the tensile strength of the joints was measured to be 585MPa, 590MPa and 585MPa, which meet the technical requirements of Class I joints in the "Technical Specification for Mechanical Connection of Steel Bars" (JGJ107-2016).

[0074] 2. Safety: The technical solution of this application, through the coordinated use of the steel bar hoisting device 5 and the steel bar support device 6, not only prevents the steel bar bundle 4 to be hoisted from slipping and falling during high-altitude hoisting in confined construction spaces, thus avoiding injury to people and property, but also solves the safety hazards of the steel bar bundle 4 to be hoisted tilting or falling and injuring people and property due to the conventional circular bottom end of the steel bar hoisting device 5 or the conventional square bottom end of the steel bar hoisting device 5 and the steel bar bundle 4 being too long and having a high center of gravity, within the confined space of the "D"-shaped operating platform. This achieves safe high-altitude hoisting of the main steel bar 2 of the tower column and improves the safety and reliability of hoisting the main steel bar 2 of the tower column.

[0075] 3. Regarding labor costs: The technical solution of this application, verified through the long-distance connection installation of the first segment of the lower tower column on the right side of the A-shaped tower of Pier 7 of this cable-stayed bridge with the pre-embedded main tower column 2, shows that the manual work of straightening the steel bars on the narrow "D"-shaped operating platform can be omitted, saving 1 person and 525 yuan in labor costs (i.e., 1 person × 1.5 days × 350 yuan / day). Therefore, the long-distance connection installation of the steel bars to be installed on the tower column with the pre-embedded main tower column 2 can save 34,650 yuan in labor costs (i.e., 1 person × 1.5 days × 350 yuan / day × 33 segments × 2 tower columns (two tower columns on the left and right sides of the tower)).

[0076] 4. Regarding the efficiency of splicing and connecting the main reinforcing bars of the tower column 2: The technical solution proposed in this application has been verified through the splicing and connecting of the reinforcing bars to be installed in the first segment of the right lower tower column of the A-shaped tower of Pier 7 of this cable-stayed bridge with the pre-embedded main reinforcing bars 2. The results show that the reinforcing bars to be installed can be quickly and easily removed in an inclined state, saving time and effort. It does not require manual pulling out or erecting of the reinforcing bars to be installed, which can shorten the splicing and connecting time of the main reinforcing bars 2 of the first segment of the large inclined tower column of the right lower tower column by 82 minutes, and improve the efficiency of the splicing and connecting of the reinforcing bars by 12.6% (i.e., shortening the splicing and connecting time of the main reinforcing bars 2 of the first segment of the large inclined tower column by 82 minutes / the existing technology's splicing and connecting time of the main reinforcing bars 2 of the first segment of the large inclined tower column by 650 minutes). This shortens the overall splicing and connecting time of the main reinforcing bars 2 of the large inclined tower column by 5412 minutes (i.e., 90.2 hours) (i.e., 82 minutes × 33 segments × 2 tower columns (two tower columns on the left and right sides of the tower)), and shortens the overall tower column construction period by 11.3 days.

[0077] The scope of application of the method of the present invention: The method of hoisting and extending the main steel bars of the cable-stayed bridge tower column in complex working environment can be applied not only to the construction of the A-shaped cable-stayed bridge tower column in the above embodiment, but also to the construction of ultra-high concrete structure projects such as highway, railway and urban bridge piers and towers, urban rail transit underground stations, and dams.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions, characterized in that, Includes the following steps: Design and fabrication: Design and fabricate a steel bar hoisting device (5) and a steel bar support device (6), and install the fabricated steel bar support device (6). The fabricated steel bar hoisting device (5) includes an end support cylinder and a hoisting rope assembly. One end of the end support cylinder is recessed along the axial direction to form an end mounting cavity. The outer surface of the end support cylinder also has a circumferentially arranged polyhedral support structure. The hoisting rope assembly is connected to the end support cylinder. The fabricated steel bar support device (6) is installed on the main steel bar (2) of the tower column or on the climbing formwork. The steel bar support device (6) has a locking slot for holding the upper end of the steel bar bundle (4). Lifting support: The steel bar bundle (4) is lifted to the top of the tower base or the support platform of the climbing formwork using a steel bar lifting device (5), and the steel bar bundle (4) is vertically inclined and supported in the slot of the steel bar support device (6); Extension installation: Using the steel bar support device (6) and the steel bar joint connection device (7), the steel bar bundle (4) is extended and connected to the pre-embedded main steel bar (2) of the tower column; The "design and fabrication" step specifically includes the following steps: design and fabrication of the rebar hoisting device (5), design and fabrication of the rebar support device (6), and adjustment and installation of the rebar support device (6); The step "Design and fabrication of rebar hoisting device (5)" specifically includes the following steps: structural design of rebar hoisting device (5); fabrication; wherein, the end support cylinder of the fabricated rebar hoisting device (5) also includes a hollow straight cylinder (501) with both ends connected and hollow cylindrical, and a multi-faceted hollow frustum (502) fixedly connected to the end of the hollow straight cylinder (501); the multi-faceted hollow frustum (502) includes a fixed end face of the hollow straight cylinder (501) to close it. The hollow straight cylinder (501) has a circular steel plate (5021) at its end, a circular steel rod (5022) fixed vertically to the center of the circular steel plate (5021) along the axial direction, and multiple polygonal steel plates (5023) arranged at intervals along the circumference of the circular steel rod (5022); the inner side of each polygonal steel plate (5023) is fixedly connected to the circular steel plate (5021) and the circular steel rod (5022), and the multiple polygonal steel plates (5023) form a polyhedral support structure; The step "Design and fabrication of steel reinforcement support device (6)" specifically includes the following steps: structural design of steel reinforcement support device (6); processing and fabrication; wherein, the fabricated steel reinforcement support device (6) includes a telescopic support rod (603) extending along the axial direction, and a support frame (601) and a fixing frame (602) connected to both ends of the telescopic support rod (603) along the axial direction; the telescopic support rod (603) is telescopically extended along its length direction and adjustable along its radial direction; the fixing frame (602) is used to detachably fix to the main steel reinforcement (2) of the tower column or the climbing formwork; the support frame (601) is provided with a bayonet.

2. The method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions as described in claim 1, characterized in that, The end support cylinder of the steel bar hoisting device (5) also includes two lifting rings (503) symmetrically connected to the two opposite outer walls of the hollow straight cylinder (501). The center of the lifting hole of the lifting ring (503) is 30mm to 50mm away from the outer wall of the hollow straight cylinder (501). The hoisting rope assembly of the steel bar hoisting device (5) includes a connecting rope (505) and a sling wire rope (506); the two ends of the connecting rope (505) are detachably connected to two lifting rings (503) through the first shackle (504); one end of the sling wire rope (506) is connected to the middle of the connecting rope (505) through the first shackle (504), and the other end of the sling wire rope (506) is used to connect the hoisting equipment (8) after being wrapped around the upper end of the steel bar bundle (4).

3. The method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions as described in claim 1, is characterized in that... The telescopic support rod (603) includes two support rods (6031) spaced apart axially, an adjusting rod (6032) connected between the two support rods (6031), and two sets of first connecting assemblies (604). The outer ends of the two support rods (6031) are respectively connected to the support frame (601) and the fixing frame (602). The adjusting rod (6032) is a hollow cylindrical shape with both ends connected. Its inner diameter is larger than the outer diameter of the support rod (6031). The outer circle of the adjusting rod (6032) is machined with a number of first adjusting holes (60321) that penetrate the wall surface. The inner ends of the two support rods (6031) are each provided with a number of second adjusting holes (60311) that penetrate the wall surface. The inner ends of the two support rods (6031) extend into the adjusting rod (6032) from both ends of the adjusting rod (6032), and each is adjustablely fixed to the adjusting rod (6032) through a first connecting component (604) with a first adjusting hole (60321) and a second adjusting hole (60311).

4. The method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions as described in claim 3, is characterized in that... The support frame (601) includes a semi-ring-shaped semi-ring frame (6011) and a first connecting rod (6012) connecting to the outer wall of the semi-ring frame (6011), and the opening of the semi-ring frame (6011) forms a bayonet; the fixing frame (602) includes a second shackle (6021) and a second connecting rod (6022) connecting to the outer wall of the second shackle (6021). The steel bar support device (6) also includes two sets of second connecting components (605) for connecting the support frame (601) and the fixing frame (602) to the two ends of the telescopic support rod (603) respectively. The second connecting rod (6022) has the same structure as the first connecting rod (6012). The first connecting rod (6012) includes a fixing part that is fixed to the semi-ring frame (6011) and a connecting part that is rod-shaped and connects to the fixing part. The outer end of the telescopic support rod (603) is recessed to form a notch. The connecting part of the first connecting rod (6012) extends into the notch. The second connecting component (605) passes through the notch and the connecting part to adjustably connect the support frame (601) and the telescopic support rod (603).

5. The method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions as described in claim 2, is characterized in that... The step "lifting support" specifically includes the following steps: In the steel bar semi-finished product stacking area at the tower column construction site, the two ends of the steel bar bundles (4) consisting of ten steel bars to be hoisted are neatly stacked; Remove the threaded protective sleeve from the end of the steel bar bundle (4) to be hoisted, and put the end of the steel bar bundle (4) to be hoisted into the hollow straight cylinder (501) of the steel bar hoisting device (5) and abut against the multi-faceted hollow cone (502) at the bottom of the steel bar hoisting device (5). At the other end of the steel bar bundle (4) to be hoisted, after wrapping the steel bar bundle (4) with the sling wire rope (506) at least one turn, connect the end of the sling wire rope (506) to the middle position of the connecting rope (505) using the first shackle (504); The other end of the sling wire rope (506) is suspended in the tower crane lifting equipment (8), and the steel bar bundle (4) is slowly lifted into the initial lifting state of: horizontal → inclined → vertical. After lifting the steel bar hoisting device (5) and the steel bar bundle (4) off the ground, pause and check whether the steel bar hoisting device (5), the steel bar bundle (4) to be hoisted, the connecting rope (505) and the sling wire rope (506) are secure. Check whether the sling wire rope (506) and the steel bar bundle (4) to be hoisted are tightly wrapped and tied. Only after confirming that there are no errors can the hoisting continue. The steel bar hoisting device (5) and the steel bar bundle (4) are hoisted to the top of the tower base or the climbing formwork operating platform (3) and placed at an angle in the slot of the steel bar support device (6) so that the temporary placement angle of the steel bar hoisting device (5) and the steel bar bundle (4) is close to the angle of the main steel bar (2) of the tower column. Remove the first shackle (504) between the sling wire rope (506) and the connecting rope (505), and loosen the entanglement and binding between the sling wire rope (506) and the steel bar bundle (4) to be hoisted.

6. The method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions as described in claim 4, is characterized in that... The "extension installation" step specifically includes the following steps: In the outermost layer of the main steel bar (2) of the first section of the tower column, select one main steel bar (2) and install a straight threaded sleeve on its top. During the installation of the extended joint, the operator is arranged to open the rebar joint connection device (7), with the sleeve hole (712) end of the clamp plate (71) facing down and the rebar hole (711) end facing up, and the straight thread sleeve of the selected tower column main rebar (2) is inserted into the sleeve hole (712) of the rebar joint connection device (7); The operator is instructed to insert the threaded end of a steel bar that has been removed into the steel bar hole (711) of the steel bar joint device (7); The operator holding the rebar joint connection device (7) holds the operating handle (75) and pulls it towards the center to complete the alignment between the first rebar to be installed and the first tower column main rebar (2) and they are on the same straight line. The rebar joint connection device (7) is locked and the rebar to be installed is tightened with an electric rebar sleeve wrench so that the quality of the rebar to be installed and the pre-embedded tower column main rebar (2) joint installation meets the requirements of the standard specifications.

7. The method for hoisting and splicing the main reinforcing bars of a cable tower column under complex operating conditions as described in claim 1, characterized in that, Before the "extension installation" step, the following steps are also included: (1) Extension installation of the tower column rigid frame.

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