Installation method of multi-beam cable tower

Abstract

The present application provides a method for installing a multi-beam steel cable tower, which comprises the following steps: installing a self-climbing deadweight machine on the top of two adjacent tower columns that meet the height requirement, the self-climbing deadweight machine being used to lift the steel tower segments and steel beams and their sub-segments of the tower columns, and the steel beams being constructed from bottom to top as the tower columns are constructed upward; when the tower columns are constructed to the top of the installation position of the first steel beam, the self-climbing deadweight machine is used to lift the first steel beam to its installation position and weld it to fix it; when the tower columns are constructed to the top of the installation position of the second steel beam, the self-climbing deadweight machine is used to lift the sub-segments of the second steel beam to the first steel beam that has been constructed, and the second steel beam is assembled on the first steel beam, and the assembled second steel beam is lifted to its installation position and welded to fix it by the self-climbing deadweight machine; the construction of the remaining steel beams is completed according to the above steps of constructing the second steel beam, and the construction is convenient.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular to a method for installing a multi-beam steel cable tower. Background Art

[0002] A cable-stayed bridge, also known as a cable-stayed bridge, is a type of bridge where the main beam is directly pulled onto the bridge tower by many cables. It is a structural system composed of a pressure-bearing tower, tensioned cables, and a bending-bearing beam. It can be seen as a multi-span elastically supported continuous beam with cables replacing piers. It can reduce the bending moment in the beam body, lower the building height, reduce the structural weight, and save materials.

[0003] A cable-stayed bridge is mainly composed of a cable tower, a main beam and a cable. The cable tower includes a double-tower type cable tower, and the double-tower type cable tower usually has multiple steel beams between the two towers. For the construction of multiple steel beams, existing tower cranes need to set temporary connecting fixings or temporary beams on the towers, and the installation of the upper steel beams takes a long time, the construction is difficult and the construction risk is high. Summary of the invention

[0004] The purpose of this application is to provide a method for installing a multi-beam steel cable tower that is convenient for constructing upper steel beams, thereby solving the problems of high risk and slow lifting speed in hoisting multiple steel beams with existing tower crane equipment.

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

[0006] A method for installing a multi-beam steel cable tower, the multi-beam steel cable tower comprising two tower columns and a steel beam arranged between the two tower columns, the distance between the two tower columns changes from bottom to top through three stages of remaining unchanged, gradually increasing and gradually decreasing, comprising the following steps:

[0007] A self-climbing deadweight machine is installed on the top of two adjacent towers that meet the height requirements. The self-climbing deadweight machine is used to lift the steel tower segments and steel beams and their sub-segments of the towers. The steel beams are constructed from bottom to top as the towers are constructed upwards;

[0008] When the tower column is constructed to the top of the installation position of the first steel beam, the first steel beam is hoisted to its installation position by the self-climbing deadweight machine and welded and fixed;

[0009] When the tower column is constructed to the installation position of the second steel beam, the self-climbing deadweight machine is used to hoist the second steel beam in sections onto the first steel beam that has been completed, and the second steel beam is assembled on the first steel beam. The assembled second steel beam is hoisted to its installation position by the self-climbing deadweight machine and welded and fixed;

[0010] Follow the steps above for constructing the second steel beam to complete the construction of the remaining steel beams.

[0011] Further configuration: the self-climbing and self-loading machine includes a steel truss, a hydraulic jack lifting system and a winch lifting system. The steel truss extends in the transverse direction and is erected on the top of two adjacent tower columns. The hydraulic jack lifting system is arranged in the middle of the steel truss for lifting the steel beam in the vertical direction. The winch lifting system moves along the longitudinal direction of the steel truss for transporting the lifted profiles in the transverse direction.

[0012] It is further arranged that: an opening is arranged at the feeding beam end of the steel truss, and the end side of the steel truss where the opening is arranged extends obliquely downward toward the tower column.

[0013] Further arrangement: the first steel beam is lifted by a hydraulic jack lifting system to the installation position of the first steel beam for installation.

[0014] Further arrangement: when hoisting the second steel beam, first use the winch lifting system to lift the steel beam segments from the opening of the steel truss, move the winch lifting system to the middle of the steel truss and lower the steel beam segments onto the first steel beam, assemble the second steel beam on the first steel beam, and then lift it to the installation location of the second steel beam by the hydraulic jack lifting system for welding and fixing.

[0015] Further configuration: a climbing mechanism is arranged below the self-climbing and self-loading machine, and one group of the climbing mechanisms is arranged corresponding to each of the two tower columns, and the two groups of climbing mechanisms are arranged at both ends of the steel truss.

[0016] Compared with the prior art, the solution of this application has the following advantages:

[0017] 1. In the multi-beam steel cable tower installation method of the present application, when constructing steel beams, the upper steel beams can use the steel beams below them as the assembly basis, and then use the hydraulic jack lifting system to lift the assembled steel beams to the corresponding installation positions, without the need to set up temporary anchor points or support components, and when lifting the upper steel beams, there is no need to consider the obstruction of the lower steel beams to their lifting, which facilitates construction.

[0018] 2. In the installation method of the multi-beam steel cable tower of the present application, a winch lifting system is used to lift the segments of the steel beam, and then the hydraulic jack lifting system lifts the assembled steel beam as a whole. The winch lifting system can quickly lift the steel beam segments, and then the hydraulic jack is used to lift the complete steel beam to ensure the stability of the lifting. The coordinated use of the two lifting systems can greatly speed up the construction efficiency of the multi-beam steel cable tower of the present application and shorten the construction period.

[0019] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 Process flow chart of the multi-beam cable tower installation method of the present application;

[0022] Figure 2 A schematic diagram of an embodiment of the self-climbing crane of the present application;

[0023] Figure 3 for Figure 2 A magnified view of the structure of part A;

[0024] Figure 4 This is a schematic diagram of the structure of the self-climbing crane from the cross bridge upwards in this application;

[0025] Figure 5 This is a schematic diagram of the structure of the self-climbing crane used to lift the steel beam in this application;

[0026] Figure 6 A schematic diagram of a structure in which two openings are provided for the self-climbing crane of the present application and two sets of winch lifting systems are provided;

[0027] Figure 7 A structural diagram of a self-climbing crane for this application with two openings and two sets of jack lifting systems;

[0028] Figure 8 A structural schematic diagram of a self-climbing crane for this application having a single opening and a set of winch lifting system and a set of jack lifting system.

[0029] In the figure, 1. steel truss; 11. opening; 12. slide rail; 2. winch lifting system; 21. winch lifting bracket; 22. winch; 23. wire rope; 24. sling; 241. sling body; 242. shoulder beam; 243. lifting lug; 244. slope adjustment cylinder; 3. hydraulic jack lifting system; 31. hydraulic jack; 32. steel strand; 4. self-climbing system; 41. climbing frame; 411. connecting piece; 42. climbing frame lifting seat; 43. cylinder seat; 44. lifting cylinder; 45. track. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0031] In view of the problem that the existing lifting of multiple beams requires setting up temporary connecting bearings and temporary supports on the tower columns, which leads to long construction time and high construction risks, the present application provides a multi-beam steel cable tower installation method using a self-climbing crane, which reduces the construction difficulty and risk of the tower columns and multiple steel beams, improves construction efficiency, and speeds up construction progress.

[0032] See also Figures 2 to 5 The multi-beam cable tower installation method of the present application is applicable to the construction of a double-tower type cable tower, and the implementation of the multi-beam cable tower installation method requires a self-climbing crane to be implemented. Specifically, the self-climbing crane includes a steel truss 1, a hydraulic jack lifting system 3 and a winch lifting system 2. The steel truss 1 extends in the transverse direction of the bridge and is erected on the top of the tower column under construction. The hydraulic jack lifting system 3 and the winch lifting system 2 are both provided on the top side of the steel truss 1. The hydraulic jack lifting system 3 is located between the two tower columns to be used for hoisting bridge structures in the vertical direction, specifically for hoisting steel beams located between the two tower columns. The winch lifting system 2 can move along the longitudinal direction of the steel truss 1, and can move to one end side of the longitudinal direction of the steel truss 1, and hoist the bridge structure at the end side. At the same time, the winch lifting system 2 can transport the bridge structure hoisted to the steel truss 1 along the longitudinal direction of the steel truss 1.

[0033] The steel truss 1 is provided with openings at both ends or one of the ends along its length direction, and the end of the opening provided on the steel truss serves as the feeding beam end of the bridge structure. The bridge structure hoisted by the hoisting system 2 can enter the steel truss 1 from the opening 11 for transportation, and the end side of the steel truss 1 provided with the opening 11 extends to the outside of the tower column, and the end side is tilted downward toward the tower column. Since the hoisting system 2 hoists the bridge structure in the vertical direction, the tilted setting of the opening 11 is conducive to the hoisting system 2 lifting the bridge structure to the opening 11 of the steel truss 1 for easy transportation.

[0034] In this embodiment, an opening is provided at one end of the steel truss, and a set of the hoisting system is provided on the steel truss. The hoisting system 2 includes a hoisting frame 21, a hoisting frame 22 and a steel wire rope 23. The hoisting frame 22 is installed on the hoisting frame 21, and the steel wire rope 23 is connected to the hoisting frame 22 to be retracted and released by the hoisting frame 22. At the same time, the end of the steel wire rope 23 away from the hoisting frame 22 (i.e., the end used to connect with the bridge structure) is provided with a sling 24 used to connect with the bridge structure to be hoisted. The sling 24 includes a sling body 241, a shoulder beam 242 and a lifting lug 243. The sling body 241 is hinged to the middle part of the upper side of the shoulder beam 242, and the lifting lug 243 is provided at both ends of the lower side of the shoulder beam 242 for two-point connection with the bridge structure, which can improve the connection strength between the sling 24 and the bridge structure. In addition, a slope adjustment cylinder 244 is provided between the sling body 241 and the shoulder pole beam 242. The slope adjustment cylinder 244 is extended and retracted to allow the shoulder pole beam 242 to swing relative to the sling body 241, thereby adjusting the longitudinal inclination of the shoulder pole beam 242.

[0035] Furthermore, the winch lifting system 2 is provided with two sets of steel wire ropes 23 to lift the bridge structure. Correspondingly, two sets of hoists 24 are also provided. By hoisting the bridge structure with two sets of hoists 24, the stability and safety of the hoisting operation can be greatly improved.

[0036] In addition, a guide rail extending along the longitudinal direction of the steel truss 1 is provided on the top, and a walking device cooperating with the guide rail is provided at the bottom of the winch 22 lifting bracket 21. The walking device in this embodiment can adopt a walking jack or a walking wheel to realize the movement of the winch 22 lifting bracket 21 along the longitudinal direction of the steel truss 1.

[0037] Since the winch lifting system 2 needs to move along the longitudinal direction of the steel truss 1, the winch lifting system 2 and the hydraulic jack 31 need to be staggered in the transverse direction of the steel truss 1. The hydraulic jack lifting system 3 includes a hydraulic jack 31 and a steel strand 32. The hydraulic jack 31 is fixed on the steel truss 1. The hydraulic jack 31 of this embodiment preferably adopts a through-type jack. The steel strand 32 passes through the middle of the hydraulic jack 31 to lift the steel strand 32 through the hydraulic jack 31, thereby achieving the purpose of lifting the bridge structure between the two towers.

[0038] Furthermore, the hydraulic jack lifting system 3 of the present application is provided with two sets between two tower columns, and the steel strands 32 of the two sets of the hydraulic jack lifting systems 3 are respectively used to connect the two ends of the bridge structure, and the steel strands 32 are lifted by the hydraulic jacks 31 of the two sets of the hydraulic jack lifting systems 3 to lift the bridge structure, thereby ensuring the stability of the lifting process of the bridge structure.

[0039] In addition, in a preferred embodiment, please combine Figure 6 , the steel truss 1 is provided with openings 11 at both ends along its length direction, and two sets of the hoisting system 2 can be provided on the steel truss 1, and the two sets of the hoisting system 2 can be used to synchronously lift the bridge structure from the openings 11 at both ends of the steel truss 1. By setting both ends of the steel truss 1 as openings 11, it is convenient for the two sets of the hoisting system 2 to synchronously lift the bridge structure, thereby increasing the hoisting speed and speeding up the construction process. In addition, this embodiment does not need to set the hydraulic jack system, and the construction of the tower column and its steel beam can also be completed by two sets of the hoisting system 2.

[0040] In another preferred embodiment, please combine Figure 7 The steel truss 1 is provided with openings 11 at both ends along its length direction. Two sets of the jack lifting systems 3 are provided on the steel truss 1 in this embodiment. The two sets of the jack lifting systems 3 are used to synchronously lift the bridge structure from the openings at both ends of the steel truss 1. The function of the jack lifting system 3 is the same as the function of the winch lifting system 2, and both can achieve the purpose of lifting the bridge structure.

[0041] The winch lifting system 2 and the jack lifting system 3 both provide bridge components, so in the actual construction process, different lifting systems can be selected for construction according to the on-site conditions. Figure 8 The steel truss 1 is provided with an opening 11 at one end thereof, and is provided with a winch lifting system 2 and a jack lifting system 3, and the construction of the tower column is completed by using two different lifting systems.

[0042] The self-climbing crane of the present application also includes a self-climbing system 4 disposed at the bottom of the steel truss 1. The self-climbing system 4 enables the self-climbing crane to climb along the height direction of the tower column, which facilitates construction and solves the problem that lifting tools such as automobile cranes are difficult to construct due to insufficient height. The self-climbing system 4 is provided in two groups corresponding to two tower columns, and each group of the self-climbing system 4 includes an anchoring seat (not shown) pre-buried on the side wall of the tower column, a track 45 attached to the anchoring seat, and a climbing component hooked on the track 45.

[0043] Specifically, there are multiple anchoring seats and they are pre-buried on the surface of the tower column at a preset interval. The rails 45 are installed on the anchoring seats. In this embodiment, at least three rails 45 are provided, and the adjacent rails 45 are connected end to end. The rails 45 can be used alternately. When the rails 45 are used alternately, the rail 45 at the bottom is transferred to the top of the top rail 45 for splicing.

[0044] The climbing assembly includes a climbing frame 41, a climbing frame lifting seat 42, a cylinder seat 43 and a lifting cylinder 44. The climbing frame 41 is fixedly connected to the climbing frame lifting seat 42. The top of the climbing frame 41 is provided with a connecting piece 411 connected to the bottom of the steel truss 1. The lifting cylinder 44 is arranged between the climbing frame lifting seat 42 and the cylinder seat 43. The bottom of the lifting cylinder 44 is fixedly connected to the cylinder seat 43, and the protruding end of the piston rod of the lifting cylinder 44 is connected to the climbing frame lifting seat 42. At the same time, the climbing frame lifting seat 42 and the cylinder seat 43 are movably connected to the track 45. The track 45 is provided with a plurality of plug-in pin holes (not shown) along its longitudinal direction. The climbing frame lifting seat 42 and the cylinder seat 43 are provided with plug-in pin mechanisms (not shown) that can cooperate with the plug-in pin holes of the track 45, thereby realizing the movable connection between the climbing frame lifting seat 42 and the cylinder seat 43 and the track 45. The climbing frame lifting seat 42 is intermittently pushed by the lifting cylinder 44, so that the climbing assembly climbs along the track 45, thereby completing the self-climbing of the self-climbing crane.

[0045] In addition, as the cable tower is constructed upward, the distance between the two tower columns of the cable tower gradually decreases. Since the self-climbing system 4 of the self-climbing crane is attached to the tower column, the connection position of the self-climbing system 4 and the steel truss 1 will change accordingly. Specifically, the position of the self-climbing system 4 connected to the opening 11 of the steel truss 1 is adjustable relative to the steel truss 1, while the position of the self-climbing system 4 far from the opening 11 of the steel truss 1 is relatively fixed to the steel truss 1. The self-climbing system 4 is connected to the steel truss 1 through the connecting piece 411, and the connecting piece 411 includes a first connecting seat connected to the steel truss 1 and a second connecting seat connected to the climbing frame 41 of the self-climbing system 4. The bottom side of the steel truss 1 is provided with a slide rail 12 extending along its longitudinal direction near its opening 11. The first connecting seat of the connecting piece 411 near the opening 11 of the steel truss 1 cooperates with the slide rail 12, so that the self-climbing system 4 near the opening 11 of the steel truss 1 can adapt to the reduction of the tower diameter to adjust its position relative to the steel truss 1, so as to ensure the normal self-climbing of the self-climbing crane of the present application. In addition, the first connecting seat and the second connecting seat are hinged, and a fastener is provided between the first connecting seat and the second connecting seat to limit the relative rotation of the first connecting seat and the second connecting seat. Since the distance between the two tower columns of the cable tower gradually decreases with the height, the steel truss 1 can be kept horizontal through the hinged arrangement of the slide rail 12 and the first connecting seat and the second connecting seat, thereby ensuring the stability of the hoisting of the bridge structure.

[0046] The self-climbing crane of the present application changes the position of the lifting feed beam from the longitudinal bridge direction to the transverse bridge direction, and increases the number of the self-climbing crane support frame, changing from the existing single tower column support to double tower column support, improving the structural stability and bearing capacity, and enabling the installation of beams on multi-beam cable towers without setting temporary connection anchor points. In addition, the self-climbing crane of the present application is also provided with a double lifting system of a winch lifting system 2 and a hydraulic jack lifting system 3. The winch lifting system 2 can be used when lifting tower column segments or steel beam segments, and the lifting speed is fast; the hydraulic jack 31 can be used to lift the assembled steel beam as a whole, which is convenient for construction, and there is no need to set temporary connection fixing seats and temporary cross braces, which greatly reduces the construction difficulty and construction risks.

[0047] The multi-beam cable tower installation method of this application is completed by using the above-mentioned self-climbing crane. Figure 1 , specifically including the following steps:

[0048] First, use a truck crane or floating crane to hoist the steel tower segments at the bottom of the tower column for installation at the pedestal. After the construction reaches a certain height, install a self-climbing crane on the top of two adjacent tower columns that meet the height requirements. The self-climbing crane is used to lift the steel tower segments and steel beams and their sub-segments of the tower column. The construction of the steel beams is carried out from bottom to top as the height of the tower column increases.

[0049] The steel tower segments of the tower column are hoisted by the hoisting system 2 of the self-climbing crane, and the hoisted steel tower segments are moved along the longitudinal direction of the steel truss 1 by the hoisting system 2 to be transported to the top of the tower column to facilitate the construction of the tower column.

[0050] When the tower column is constructed to the installation position of the first steel beam, the self-climbing crane can be used to lift the first steel beam to the installation position and weld it. Since the first steel beam is the bottom beam of the multi-beam cable tower, there is no other bridge structure blocking it. The prefabricated first steel beam can be lifted as a whole by the hydraulic jack lifting system 3 of the self-climbing crane. After the construction of the first steel beam is completed, the tower column will continue to be constructed.

[0051] When the tower column is constructed to above the installation position of the second steel beam, the self-climbing crane is used to lift the segments of the second steel beam to the first steel beam that has been completed, and the first steel beam is used as the assembly basis for the second steel beam. The second steel beam is assembled on the first steel beam, and then the self-climbing crane is used to lift the assembled second steel beam from the first steel beam to its installation position for welding and fixing.

[0052] When hoisting the second steel beam, the winch lifting system 2 of the self-climbing crane can be used to lift the steel beam segments at the opening 11 of the steel truss 1, and then the winch lifting system 2 can be used to transport the steel beam segments along the longitudinal direction of the steel truss 1, and the steel beam segments are lowered to the assembled first steel beam. The position of the lowered steel beam segments can be adjusted at any time to facilitate the assembly of the steel beams. After the second steel beam is assembled on the first steel beam, the hydraulic jack lifting system 3 of the self-climbing crane is connected to the two ends of the second steel beam to hoist the assembled second steel beam from the first steel beam to its installation position for welding and fixing.

[0053] Then continue the construction of the tower column and the remaining steel beams, and install the second steel beam constructed as mentioned above to complete the construction of the remaining steel beams.

[0054] The multi-beam cable tower of this embodiment is provided with a total of four steel beams. The first steel beam at the bottom can be directly hoisted from the ground or a floating crane, and the second steel beam, the third steel beam and the fourth steel beam arranged in sequence above the first steel beam can be hoisted in sections by a self-climbing crane to the completed steel beam below the steel beam to be constructed for assembly, and then the assembled steel beam is lifted to its installation position for welding and fixing, so there is no need to set a temporary fixed installation seat and other temporary support components on the tower column. In addition, the dead weight of the steel beam is relatively large. In this application, the steel beam is hoisted in sections, and the steel beam located at the bottom is used as the assembly basis of the upper steel beam, which is convenient for construction. At the same time, the problem of excessive force on the overall hoisted steel beam leading to installation difficulty and excessive risk is reduced, which greatly speeds up the construction progress.

[0055] In summary, the present application adopts a self-climbing crane to complete the construction of a multi-beam cable tower. The self-climbing crane changes the conventional feeding beam position from the longitudinal bridge direction to the transverse bridge direction, thereby supporting the self-climbing crane through two tower columns, thereby enhancing the structural stability and load-bearing capacity of the self-climbing crane, and then ensuring the stability of the hoisting process. The self-climbing crane is not only used in the construction of the cable tower body assembly and main beam structure assembly of the multi-beam cable tower of the present application, but can also be used in the transportation of other building components of the bridge. At the same time, in the installation method of the multi-beam steel cable tower of the present application, when installing the steel beam, the steel beam located above can use the steel beam below it as the assembly basis, and the steel beam segment is hoisted on the steel beam below it to complete the assembly, and then the whole is hoisted to the installation position for installation and fixation. The hoisting difficulty is low, and there is no need to set up temporary anchor points separately. The construction is convenient, which greatly speeds up the construction process.

[0056] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for installing a multi-beam steel cable tower, wherein the multi-beam steel cable tower comprises two tower columns and a steel beam arranged between the two tower columns, wherein the distance between the two tower columns changes from bottom to top through three stages: remaining unchanged, gradually increasing, and gradually decreasing, wherein: The following steps are involved: A self-climbing crane is installed on the top of two adjacent tower columns that meet the height requirements, and the self-climbing crane is used to lift the steel tower segments and steel beams and their sub-segments of the tower columns. The steel beams are constructed from bottom to top as the tower columns are constructed upward. The self-climbing crane comprises a steel truss, a hydraulic jack lifting system and a winch lifting system. The steel truss extends in the transverse direction and is erected on the top of two adjacent tower columns. The hydraulic jack lifting system is arranged in the middle of the steel truss for lifting the steel beam in the vertical direction. The winch lifting system moves in the longitudinal direction of the steel truss for transporting the lifted profiles in the transverse direction. The steel truss is provided with an opening at its feeding beam end, and the end side of the steel truss provided with the opening extends obliquely downward toward the tower column. The self-climbing crane lifts the feeding beam in the transverse direction. A self-climbing system is arranged below the self-climbing crane, and one group of the self-climbing systems is arranged corresponding to each of the two tower columns, and two groups of the self-climbing systems are arranged at both end sides of the steel truss. When the tower column is constructed to the top of the installation position of the first steel beam, the first steel beam is hoisted to its installation position by the self-climbing crane and welded and fixed; When the tower column is constructed to the installation position above the second steel beam, the self-climbing crane is used to hoist the second steel beam segments onto the first steel beam that has been completed. The steel beam segments are first hoisted from the opening of the steel truss by the hoisting system. The hoisting system moves to the middle of the steel truss and lowers the steel beam segments onto the first steel beam. The second steel beam is assembled on the first steel beam and then hoisted to the installation position of the second steel beam by the hydraulic jack hoisting system for welding and fixing. Complete the construction of the remaining steel beams according to the above steps for constructing the second steel beam; In which, as the cable tower is constructed upward, the spacing between the two tower columns of the cable tower gradually decreases, and the self-climbing system connected near the opening of the steel truss is adjustable relative to the steel truss, while the self-climbing system away from the opening of the steel truss is relatively fixed in position with respect to the steel truss. The self-climbing system is connected to the steel truss by a connecting piece, and the connecting piece includes a first connecting seat connected to the steel truss and a second connecting seat connected to the climbing frame of the self-climbing system. A sliding rail extending along the longitudinal direction of the steel truss is provided near the opening of the steel truss on the bottom side of the steel truss, and the first connecting seat of the connecting piece near the opening of the steel truss cooperates with the sliding rail, so that the self-climbing system near the opening of the steel truss can adapt to the reduction of the tower column diameter to adjust its position relative to the steel truss, and the first connecting seat and the second connecting seat are hinged, and a fastener is provided between the first connecting seat and the second connecting seat to limit the relative rotation of the first connecting seat and the second connecting seat.

2. The method for installing a multi-beam steel cable tower according to claim 1, characterized in that: The first steel beam is lifted by a hydraulic jack lifting system to the installation position of the first steel beam for installation.

Images