Method for controlling installation and construction stability of high-altitude ultra-long and ultra-high steel member on flexible cable net

Abstract

The invention discloses a high-altitude ultra-long and ultra-high steel member installation construction stability control method on a flexible cable net, which comprises the following steps: S1, a radial main beam is hoisted to the flexible cable net, and the lower part of the head end of the radial main beam is connected with a vertical main supporting rod; a plurality of vertical secondary supporting rods are evenly arranged on the bottom side of the radial main beam in the axis direction of the radial main beam at intervals. S2, the radial main beam is gradually lowered, and the tail end of the radial main beam is connected to the inner ring beam through a pin shaft; s3, the adjustable lateral cables connected to the two sides of the vertical main supporting rod in advance are preliminarily pre-pulled downwards, then the single steel component is gradually lowered, the vertical secondary supporting rod and the radial cables are sequentially connected through cable clamps, and the bottom end of the vertical main supporting rod and the inner side annular cable are sequentially connected through cable clamps; and S4, the adjustable lateral cable is connected, the telescopic length is adjusted, and the adjustable lateral cable is tensioned and fixed. The method can ensure that the steel member forms a stable structural system under the support of the cable net, a large amount of measure cost is reduced, and the mounting quality is improved.

Description

Technical Field

[0001] The present invention belongs to the field of building construction, and particularly relates to a method for controlling the stability of the installation construction of ultra-long and ultra-high steel members in the air on a flexible cable net. Background Art

[0002] In modern engineering construction, the design of large stadiums increasingly tends to use steel structures as the main support structure for their roofs. This choice is not only because steel has good mechanical properties and high load-bearing capacity, but also because it can provide more flexible and variable spatial layout possibilities. However, in the actual construction process, especially for the upper ultra-long and ultra-high single steel members, due to their long length, high height, and lack of effective lateral support during hoisting, the entire structure becomes extremely unstable during installation. The traditional installation process uses the construction method of erecting falsework, installing the steel structure first, and then installing the cable structure. This installation method effectively solves the stability problem of installing rigid structures on flexible cable net structures. However, because falsework needs to be erected, the construction time is relatively long, and the material costs and labor costs involved in erecting falsework are relatively high.

[0003] The construction site of this project has limited space and is located in the basement roof area, and there are limitations on the structural bearing capacity; secondly, the main steel members adopt ultra-long and heavy designs, with a single length of 54 meters, a maximum height of 17.5 meters, and a weight of 44 tons. Due to the restriction of the site bearing capacity, multi-bay synchronous hoisting operations cannot be realized, and it is difficult to construct a temporary stable support system for multi-bay members in conventional construction, resulting in the risk of lateral tilt during the hoisting of single members. Therefore, there is an urgent need for an innovative control method for stability control. Summary of the Invention

[0004] In view of the above technical problems, the present invention proposes a method for controlling the stability of the installation construction of ultra-long and ultra-high steel members in the air on a flexible cable net. By setting reliable tension members on both the head and tail sides of the steel members, a stable structural system is ensured under the support of the cable net, reducing a large amount of measure costs and improving the installation quality.

[0005] To achieve the above technical objectives, the present invention adopts the following technical means:

[0006] A method for controlling the stability of the installation construction of ultra-long and ultra-high steel members in the air on a flexible cable net, the flexible cable net includes an inner circumferential cable and a radial cable, wherein one end of the radial cable forms a first node at the connection between the inner ring beam located outside the flexible cable net; the other end of the radial cable forms a second node at the connection with the inner circumferential cable, and the method includes the following steps:

[0007] S1. Lift a single steel member above the flexible cable net. The single steel member includes a radial main beam. The tail end of the radial main beam faces directly above the first node, and a vertical main strut is connected to the lower part of the head end of the radial main beam. The vertical main strut faces directly above the second node. A plurality of vertical secondary struts are evenly arranged at intervals along the axial direction of the radial main beam on the bottom side of the radial main beam. The lower end of the vertical secondary strut faces directly above the radial cable.

[0008] S2. Gradually lower the radial main beam and connect the tail end of the radial main beam to the inner ring beam at the first node through a pin shaft.

[0009] S3. Preliminary pre-tensioning: Pull two adjustable lateral cables on the left and right sides of the single steel member respectively to make the head end of the single steel member initially in a stable state. Then gradually lower the single steel member, and connect the vertical secondary strut and the radial cable, and the bottom end of the vertical main strut and the inner circumferential cable at the second node through cable clamps in sequence from the tail end to the head end of the radial main beam.

[0010] S4. Tighten and fix: Symmetrically connect two adjustable lateral cables between the two sides of the vertical main strut and the inner circumferential cable. By adjusting the telescopic length of the adjustable lateral cable, adjust to keep the vertical main strut and the inner circumferential cable perpendicular, and after perpendicularity, tension and fix the adjustable lateral cable. Then tighten and fix the radial main beam between the left and right sides and the inner ring beam through guy ropes.

[0011] Beneficial effects: By respectively arranging tension structures on the head and tail sides of the single steel member, the present invention reduces a large amount of costs such as the material cost of the falsework and the labor costs for erecting and dismantling the falsework, reduces the risk of high-altitude operations, and improves the installation quality. And the two-way constraints at the head and tail enhance the structural stability, significantly reducing the overall deformation of the steel member, and are applicable to semi-rigid cable-supported lattice structures or scenarios with complex loads.

[0012] In an optional embodiment, in step S3, the vertical main strut and the vertical secondary strut are respectively connected to the components on the cable clamp through pin shafts on the ground, and the bolts are connected between the components on the upper part and the lower part of the cable clamp at high altitude. The construction steps are as follows:

[0013] S31: Assemble the vertical strut and the components on the cable clamp on the ground;

[0014] S32: Lower the vertical strut to dock with the cable clamp points of the radial cable;

[0015] S33: The operator installs the lower components of the cable clamp on the aerial work platform;

[0016] S34: Tighten the bolts to complete the connection.

[0017] Beneficial effects: Due to the differences between the construction process of the cable body and the designed position state, during the construction process, the cable clamps are relatively inward and upward, and the opening size of the pin hole is only 1-2 mm larger than the large diameter of the pin. In the case of misalignment, it is difficult to achieve the docking of the pins during high-altitude operations. In the present invention, the vertical main strut and the vertical secondary strut are respectively connected to the components on the cable clamp through pins on the ground, and the bolt connection of the components on the cable clamp and the lower components at high altitude can reduce the construction difficulty.

[0018] In an alternative embodiment, in step S4, tilt sensors are installed on the vertical main strut and the inner circumferential cable to continuously monitor the relative angular deviation between the vertical main strut and the inner circumferential cable.

[0019] The tilt sensors continuously monitor the angular deviation between the vertical main strut and the inner circumferential cable, and transmit it to the control terminal. The control terminal sends the angular deviation data to the operator in real time, and the operator adjusts the telescopic length of the adjustable lateral cable to adjust the connection angle between the vertical main strut and the inner circumferential cable.

[0020] In an alternative embodiment, connecting ear plates are welded on the radial main beam and the inner ring beam, and two guy ropes are symmetrically connected between the left and right sides of the radial main beam and the inner ring beam through the connecting ear plates, and the guy ropes are tightened and fixed through the manual hoists on the guy ropes.

[0021] In an alternative embodiment, each adjustable lateral cable includes a cable body and cable heads with pin holes connected to both ends of the cable body. The cable head at any one end is connected to the cable body through a screw telescopic mechanism, and the length of the adjustable lateral cable is adjusted by screwing the screw telescopic mechanism.

[0022] Beneficial effects: The lateral cable structure is an adjustable lateral cable whose length can be adjusted, and it is a permanent cable of the later structure. By adopting this structure, on the one hand, the integrated design of the temporary support and the permanent cable body is realized, reducing the construction cost of temporary measures. On the other hand, it can better adapt to the requirements of steel members of different sizes and shapes, reduce installation errors, and has strong versatility and flexibility.

[0023] In an alternative embodiment, step S5 is further included, and two lateral steel struts are symmetrically connected between both sides of the vertical main strut and the inner circumferential cable.

[0024] Beneficial effects: With the lateral steel struts as an additional insurance, a truss system is formed with a single steel member, further ensuring the safety of the steel member under the action of high-altitude wind loads.

[0025] In an alternative embodiment, the lateral steel strut is a length-adjustable lateral steel strut, comprising: a rod body and a base coaxially connected. One end of the rod body is connected to the vertical main strut through an ear plate. A hydraulic telescopic unit is connected between the rod body and the base. The other end of the base is connected to the inner circumferential cable through an ear plate. The hydraulic telescopic unit adjusts the length of the lateral steel strut to control the connection angle between the vertical main strut and the inner circumferential cable.

[0026] Advantageous effects: Making the lateral steel strut into a length-adjustable structure can be applicable to different specifications of steel members and is suitable for the subsequent stability construction of single steel members, reducing the limitation of the traditional fixed-length steel tie rod that requires customized production and greatly reducing the construction cost.

[0027] In an alternative embodiment, two adjustable lateral cables and the inner circumferential cable form two third nodes at the connection. A downward pulling tooling cable is arranged below the second node and the third node. During the process of steps S1 to S5, the elevation of the lower cable net is adjusted through the downward pulling tooling cable to keep the installation position of the cable net always at the designed elevation.

[0028] In an alternative embodiment, in steps S1 to S2, a crawler crane is used as the lifting equipment. Description of the Drawings

[0029] Figure 1 It is a front view schematic diagram for hoisting a single steel member;

[0030] In the figure, 4, radial main beam; 5-1, vertical main strut; 5-2, vertical secondary strut; 6, radial cable; 8, inner ring beam; 9, downward pulling tooling cable;

[0031] Figure 2 It is an isometric schematic diagram of the stability measures for a single steel member;

[0032] In the figure, 1, adjustable lateral cable; 2, lateral steel strut; 3, inner circumferential cable; 7, guy rope; 10, cable clip;

[0033] Figure 3 It is a schematic diagram during the hoisting of a single steel member;

[0034] Figure 4 It is a schematic diagram of the connection process of the strut and the cable clip;

[0035] Figure 5 It is a schematic diagram of connecting the tail guy rope and the head adjustable lateral cable;

[0036] Figure 6 It is a schematic diagram of connecting the lateral steel strut;

[0037] Figure 7 It is a schematic diagram of the adjustable lateral cable;

[0038] In the figure, 11 is the cable head; 12 is the screw telescopic mechanism; 13 is the rigging; 14 is the cable body; 15 is the pin shaft;

[0039] Figure 8 It is a schematic diagram of the cable clamp;

[0040] In the figure, 101 are the components on the cable clamp; 102 are the components under the cable clamp;

[0041] Figure 9 It is a schematic diagram of the lateral steel bracing structure;

[0042] In the figure, 21 is the ear plate; 22 is the base; 23 is the hydraulic telescopic unit; 24 is the baffle; 25 is the rod body. Specific implementation manners

[0043] The following further describes the present invention in conjunction with specific implementation manners.

[0044] As Figure 1 shown, a method for controlling the installation construction stability of ultra-long and ultra-high steel members in the air on a flexible cable net ensures a stable structural system of the steel members supported by the cable net by setting reliable tension members on both sides of the head and tail of the steel members. The installation members include: adjustable lateral cable 1, lateral steel bracing 2, inner circumferential cable 3, radial main beam 4, vertical main strut 5-1, vertical secondary strut 5-2, radial cable 6, guy wire 7, inner ring beam 8, lower pulling tooling cable 9, and cable clamp 10.

[0045] The flexible cable net includes the inner circumferential cable 3 and the radial cable 6, wherein a connection between one end of the radial cable 6 and the inner ring beam 8 located outside the flexible cable net forms a first node; a connection between the other end of the radial cable 6 and the inner circumferential cable 3 forms a second node, including the following steps:

[0046] S1. Hoist a single steel member onto the flexible cable net. The single steel member includes a radial main beam 4. The tail end of the radial main beam 4 faces above the first node. A vertical main strut is connected to the lower part of the head end of the radial main beam 4, and the vertical main strut faces above the second node. A plurality of vertical secondary struts 5-2 are evenly spaced along the axial direction of the radial main beam 4 on the bottom side of the radial main beam 4, and the lower ends of the vertical secondary struts 5-2 face above the radial cable 6 on the flexible cable net;

[0047] S2. Gradually lower the radial main beam 4, and connect the tail end of the radial main beam 4 to the inner ring beam 8 at the first node through a pin shaft;

[0048] S3. Preliminary pre-tensioning: Pull two adjustable lateral cables on the left and right sides of a single steel member respectively to make the head end of the single steel member initially in a stable state. Then gradually lower the single steel member, and connect the vertical secondary struts and the radial cables 6, as well as the bottom ends of the vertical main struts and the inner circumferential cables 3 at the second node, through cable clamps 10 in sequence from the tail end to the head end of the radial main beam 4.

[0049] S4. Further adjust the telescopic length of the adjustable lateral cable 1 and adjust the connection angle between the vertical main strut 5-1 and the inner circumferential cable 3 to make the adjustable lateral cable 1 tensioned and fixed. After fixation, the vertical main strut 5-1 and the inner circumferential cable 3 are perpendicular to each other. Then hoist the guy ropes, and tighten and fix the radial main beam 4 on the left and right sides and the inner ring beam 8 through the guy ropes 7.

[0050] Combined with Figure 3 and Figure 4 As shown in the figure, six 70-meter-long assembly jigs are set inside the site to assemble the radial main beam 4, the vertical main strut 5-1, and the vertical secondary strut 5-2 to form a single steel member with a length of 54 meters and a weight of 44 tons. The single steel member is a connecting body of the radial main beam 4, the vertical main strut 5-1, and the vertical secondary strut 5-2 that are pre-assembled on the ground in advance, and four lifting lugs are welded on the radial main beam 4. The pulling tooling cable 9 pulls the cable net structure composed of the inner circumferential cable 3 and the radial cable 6 down to the design elevation, and the single steel member is hoisted in the air by a 650-ton crawler crane.

[0051] 1. Hoisting calculation at four points on the radial steel beam:

[0052] 1) The deflection value 20.41mm < L / 250 = 10105 / 250 = 40.42mm, meeting the requirements.

[0053] 2) The stress value 35.09MPa < f = 295MPa, meeting the requirements.

[0054] 2. The vertical main strut and the vertical secondary strut are respectively connected with the cable clamp: The vertical main strut and the vertical secondary strut are respectively connected with the cable clamp through a pin shaft. Due to the difference between the construction process of the cable body and the designed position state, the cable clamp is relatively inward and upward during the construction process, and the opening size of the pin hole is only 1-2mm larger than the large diameter of the pin shaft. In the case of misalignment, it is difficult to achieve the docking of the pin shaft during high-altitude operation.

[0055] Therefore, the vertical main strut and the vertical secondary strut are respectively connected with the parts on the cable clamp through a pin shaft on the ground, and the bolts are connected between the parts on the cable clamp and the lower parts at high altitude. The construction steps are as Figure 4 shown:

[0056] Process 1: The vertical main strut and the vertical secondary strut are respectively assembled with the parts 101 on the cable clamp on the ground;

[0057] Process 2: Lower the vertical main strut and the vertical secondary strut respectively to be butted with the radial cable clamp points;

[0058] Process 3: The operator installs the lower part 102 of the cable clamp on the aerial work platform;

[0059] Process 4: Tighten the bolts to complete the connection.

[0060] Combined with Figure 5 and Figure 8 As shown, lower a single steel member. The tail end of its radial main beam 4 is pin-connected to the inner ring beam 8 through a pin shaft. The first end adjustable lateral cable 1 is pin-connected to the inner circumferential cable 3. Initially pre-tighten the two adjustable lateral cables 1 on both sides by turning the screw. Then make the single steel member tilt slightly by 5°. Gradually lower the single steel member, and connect the vertical main strut and the vertical secondary strut to the radial cable 6 through the cable clamp 10 from the tail end to the first end. Among them, the upper part 101 of the cable clamp of the cable clamp 10 is pre-connected to the vertical main strut and the vertical secondary strut on the ground. The operator installs the lower part 102 of the cable clamp on the aerial work platform, tightens the bolts of the cable clamp 10 to complete the connection; thereafter, construct the two adjustable lateral cables 1 on both sides, connect them to the inner circumferential cable 3 through the pin shaft 15, and turn the screw telescopic mechanism 12 to adjust the length of the adjustable lateral cable 1 to make it tensioned and fixed; then hoist the guy rope 7. The radial main beam 4 and the inner ring beam 8 are welded with connecting ear plates, and connect the two through the pin shaft of the guy rope 7, and make it tightened and fixed through the manual hoist on the guy rope 7; in this process, adjust the cable net elevation through the lower pulling tooling cable 9;

[0061] Furthermore, install inclination sensors on the vertical main strut 5-1 and the inner circumferential cable 3 to continuously monitor the relative angle deviation between the vertical main strut 5-1 and the inner circumferential cable 3 in real time;

[0062] The inclination sensors continuously monitor the angle deviation between the vertical main strut and the inner circumferential cable; and transmit it to the control terminal. The control terminal sends the angle deviation data to the operator in real time. The operator adjusts the telescopic length of the adjustable lateral cable to adjust the connection angle between the vertical main strut and the inner circumferential cable until the angle deviation is within the allowable range.

[0063] S5. Finally, hoist the lateral steel strut. The lateral steel strut is connected to the vertical main strut 5-1 and the inner circumferential cable 3 through the ear plate 21. Two lateral steel struts are symmetrically connected between the two sides of the vertical main strut and the inner circumferential cable. As an additional insurance, the lateral steel strut forms a truss system with the single steel member, further ensuring the safety of the steel member under the action of high-altitude wind load.

[0064] As a further preferred solution of this embodiment, the lateral steel strut is a length-adjustable lateral steel strut, including: a rod body 25 and a base 22 connected coaxially. One end of the rod body 25 is connected to the vertical main strut through an ear plate. A hydraulic telescopic unit is connected between the rod body 25 and the base 22. The other end of the base 22 is connected to the inner circumferential cable 3 through an ear plate.

[0065] In this embodiment, making the lateral steel strut into a length-adjustable structure can be applicable to steel members of different specifications and is suitable for the subsequent stability construction of single steel members, reducing the limitation of the traditional fixed-length steel tie rod that requires customized production and greatly reducing the construction cost.

[0066] Through the ansys finite element analysis software, the hoisting of a single steel member and the simulation analysis of the stability measures of applying the adjustable lateral cable 1, the lateral steel strut 2 and the guy wire 7 respectively are carried out, showing the stress state and configuration changes under key working conditions, and solving the problem of lateral instability during the construction of a single steel member. A total of ten working conditions are analyzed in the whole simulation.

[0067] Working condition 1: The lower pulling tooling cable 9 pulls the inner circumferential cable 3 down to the design elevation;

[0068] Working condition 2: Lower the hook, connect the radial main beam 4 and the inner ring beam 8 with a pin shaft, and install and pre-tighten the adjustable lateral cables 1 on both sides;

[0069] Working conditions 3-8: Continue to lower the hook, and connect the 5 vertical secondary struts 5-2 and 1 vertical main strut 5-1 to the radial cable 6 through the cable clips 10 in sequence from the tail end to the head end;

[0070] Working condition 9: The hook is disengaged;

[0071] Working condition 10: Tension the adjustable lateral cables 1 on both sides, and install the lateral steel strut 2 and the guy wire 7;

[0072] During the simulation analysis process, the stress and displacement changes are shown in the following table:

[0073] Stress change:

[0074]

[0075] Displacement change:

[0076]

[0077] During the simulation analysis, after the hook is unhooked, the verticality of the 5 vertical secondary struts 5-2 and 1 vertical main strut 5-1 from the tail end to the head end is 1 / 130, 1 / 222, 1 / 555, 1 / 6250, 1 / 4348, 1 / 558 respectively, all of which do not exceed the limit value of 1 / 120, and the simulation analysis is feasible.

[0078] The above content is an example and explanation of the present invention. Those skilled in the art to which this technology pertains can make various modifications, supplements, or use similar methods for substitution to the described specific embodiments. As long as they do not deviate from the protection scope of the invention or exceed the scope defined by this claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for controlling the installation construction stability of ultra-long and ultra-high steel components at high altitude on a flexible cable net. The flexible cable net includes an inner circumferential cable (3) and radial cables (6). One end of the radial cable (6) forms a first node at the connection with the inner ring beam (8) located outside the flexible cable net. The other end of the radial cable (6) forms a second node at the connection with the inner circumferential cable (3). It is characterized in that, It includes the following steps: S1. Hoist a single steel member above the flexible cable net. The single steel member includes a radial main beam (4). The tail end of the radial main beam (4) faces directly above the first node. A vertical main strut is connected to the lower part of the head end of the radial main beam (4). The vertical main strut faces directly above the second node. A plurality of vertical secondary struts are evenly arranged at intervals along the axial direction of the radial main beam (4) on the bottom side of the radial main beam (4). The lower end of the vertical secondary strut (5-2) faces directly above the radial cable (6). S2. Gradually lower the radial main beam (4) and connect the tail end of the radial main beam (4) to the inner ring beam (8) located at the first node through a pin shaft. S3. Preliminary pre-tensioning: Pull two adjustable lateral cables on the left and right sides of the single steel member respectively to make the head end of the single steel member initially in a stable state. Then gradually lower the single steel member. Connect the space between the vertical secondary strut and the radial cable (6) and the space between the bottom end of the vertical main strut and the inner circumferential cable (3) at the second node through cable clamps (10) in sequence from the tail end to the head end of the radial main beam (4). S4. Tighten and fix: Symmetrically connect two adjustable lateral cables between the two sides of the vertical main strut and the inner circumferential cable. Adjust the telescopic length of the adjustable lateral cable to adjust to keep the vertical main strut perpendicular to the inner circumferential cable (3). After perpendicularity, tension and fix the adjustable lateral cable. Then tighten and fix through guy ropes (7) between the left and right sides of the radial main beam (4) and the inner ring beam (8).

2. The construction stability control method for installing super-long and super-high steel members at high altitudes on a flexible cable net according to claim 1, characterized in that, In step S3, connect the vertical main strut and the vertical secondary strut to the components on the cable clamp through pin shafts on the ground respectively, and carry out bolt connection between the components on the cable clamp and the lower components at high altitude. The construction steps are as follows: S31: Assemble the vertical strut and the components (101) on the cable clamp on the ground. S32: Lower the vertical strut to dock with the cable clamp point of the radial cable. S33: The operator installs the lower components (102) of the cable clamp on the aerial work platform. S34: Tighten the bolts to complete the connection.

3. The construction stability control method for installing a super-long and super-high steel member in the air on a flexible cable net according to claim 1, characterized in that in step S4, inclination sensors are installed on the vertical main strut and the inner circumferential cable to monitor the relative angle deviation between the vertical main strut and the inner circumferential cable in real time. The inclination sensors continuously monitor the angle deviation between the vertical main strut and the inner circumferential cable, and transmit it to the control terminal. The control terminal sends the angle deviation data to the operator in real time. The operator adjusts the telescopic length of the adjustable lateral cable to adjust the connection angle between the vertical main strut and the inner circumferential cable.

4. The construction stability control method for installing ultra-long and ultra-high steel members at high altitudes on a flexible cable net according to claim 1, characterized in that, Connection ear plates are welded on the radial main beam (4) and the inner ring beam (8). Two guy ropes (7) are symmetrically connected between the left and right sides of the radial main beam (4) and the inner ring beam (8) through the connection ear plates, and the guy ropes (7) are tightened and fixed through the chain blocks on the guy ropes (7).

5. The construction stability control method for installing ultra-long and ultra-high steel members at high altitude on a flexible cable net according to claim 1, characterized in that, Each adjustable lateral cable (1) includes a cable body (14) and cable heads (11) with pin holes connected to both ends of the cable body (14). A screw telescopic mechanism (12) is connected between the cable head (11) at any one end and the cable body (14). The length of the adjustable lateral cable is adjusted by turning the screw telescopic mechanism (12).

6. The construction stability control method for installing super-long and super-high steel members at high altitude on a flexible cable net according to claim 1, characterized in that It further includes step S5, where two lateral steel struts are symmetrically connected between the two sides of the vertical main strut and the inner circumferential cable (3).

7. The stability control method for the installation and construction of ultra-long and ultra-high steel components at high altitudes on a flexible cable net according to claim 6, characterized in that The lateral steel strut is an adjustable-length lateral steel strut, including: a rod body (25) and a base (22) connected coaxially. One end of the rod body (25) is connected to the vertical main strut through an ear plate (21). A hydraulic telescopic unit is connected between the rod body (25) and the base (22). The other end of the base is connected to the inner circumferential cable (3) through an ear plate. The hydraulic telescopic unit adjusts the length of the lateral steel strut.

8. The construction stability control method for installing ultra-long and ultra-high steel members at high altitude on a flexible cable net according to claim 6, characterized in that, The connection points of the two adjustable lateral cables (1) and the inner circumferential cable (3) form two third nodes. A downward pull tooling cable is arranged below the second node and the third node. During steps S1 to S5, the elevation of the lower cable net is adjusted through the downward pull tooling cable so that the installation position of the cable net is always at the designed elevation.

9. The construction stability control method for installing super-long and super-high steel components at high altitude on a flexible cable net according to claim 1, characterized in that: During steps S1 to S2, a crawler crane is used as the lifting equipment.

Images