Semi-rigid cable dome structure and its construction method

Abstract

The present invention relates to a semi-rigid cable dome structure and a construction method thereof, belonging to the field of civil engineering structural technology, comprising vertical inner braces, a plurality of vertical middle braces, a plurality of vertical outer braces and a plurality of outer ring beams, rigid outer ridge rods and outer oblique cables are arranged between the two ends of the outer ring beam and the vertical outer braces, upper rigid middle ring rods and upper middle ring cables are arranged at intervals between the upper ends of two adjacent vertical outer braces, lower middle ring cables are arranged between the lower ends of two adjacent vertical outer braces, middle ridge cables and middle oblique cables are arranged between the vertical middle braces and the upper ends of two adjacent vertical outer braces, upper inner ring cables are arranged between the upper ends of two adjacent vertical middle braces, lower inner ring cables are arranged between the lower ends of two adjacent vertical middle braces, and inner ridge cables and inner oblique cables are arranged between the vertical inner braces and the upper ends of the vertical middle braces. The structure has the characteristics of high initial structural rigidity, easy rod positioning, large structural redundancy, low construction cost and low difficulty. The problems of long construction period and poor quality reliability are solved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering structures, and in particular to a semi-rigid cable dome structure and a construction method thereof. Background Art

[0002] The cable dome structure is a prestressed spatial structure system with reasonable force and high structural efficiency. It is a flexible structure composed of cables, rods and membranes. Due to its lightness and beauty, it is favored by many architects. In actual projects at home and abroad, the cable dome structure is the structure closest to the concept of "tensegrity" proposed by Fuller.

[0003] The cable dome structure is a flexible structure formed by double-layer cables connected by vertical struts. The upper cables are prone to slack and stop working. Therefore, during the construction process, high prestress must be applied to the cables to meet the stability requirements of the structural system. Since high prestress needs to be applied to the cables to form the structure, the structural system has extremely high requirements for non-cable structural components, and powerful outer ring beams and supports are required to balance the high prestress. Such characteristics of the cable dome structure have led to many technical difficulties, such as low initial structural stiffness, difficulty in positioning rods, low structural redundancy, high construction cost and difficulty, etc. Summary of the invention

[0004] The present invention mainly solves the shortcomings of the prior art, such as low initial structural rigidity, difficult rod positioning, low structural redundancy, high construction cost and difficulty, and provides a semi-rigid cable dome structure and a construction method thereof, which has the characteristics of high initial structural rigidity, easy rod positioning, high structural redundancy, low construction cost and difficulty, and solves the problems of long construction period and poor quality reliability.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0006] A semi-rigid cable dome structure comprises a vertical inner support rod, a plurality of vertical middle support rods are arranged on the periphery of the vertical inner support rod, a plurality of vertical outer support rods are arranged on the periphery of the vertical middle support rod, a plurality of outer ring beams are arranged on the periphery of the vertical outer support rod, rigid outer ridge rods are arranged between the two ends of the outer ring beam and the upper end of the vertical outer support rod, outer oblique cables are arranged between the two ends of the outer ring beam and the lower end of the vertical outer support rod, upper rigid middle ring rods and upper middle ring cables are arranged at intervals at the upper ends of two adjacent vertical outer support rods, and the two adjacent vertical outer support rods are provided with a plurality of outer ring beams. A lower middle ring rope is provided between the lower ends of the rods, a middle ridge rope is provided between the upper end of the vertical middle support rod and the upper ends of the two adjacent vertical outer support rods, a middle oblique rope is provided between the lower end of the vertical middle support rod and the upper ends of the two adjacent vertical outer support rods, an upper inner ring rope is provided between the upper ends of the two adjacent vertical middle support rods, a lower inner ring rope is provided between the lower ends of the two adjacent vertical middle support rods, an inner ridge rope is provided between the upper end of the vertical inner support rod and the upper end of the vertical middle support rod, and an inner oblique rope is provided between the lower end of the vertical inner support rod and the upper end of the vertical middle support rod.

[0007] Preferably, the outer ring beam, the rigid outer ridge rod and the vertical outer struts are fixed with a welded ball node structure, and ear plate seats and ear plates are provided between the outer oblique cable and the outer ring beam, between the outer oblique cable and the vertical outer struts, between the upper middle ring cable and the vertical outer struts, between the lower middle ring cable and the vertical outer struts, between the middle ridge cable and the vertical outer struts, between the middle ridge cable and the vertical middle struts, between the middle oblique cable and the vertical outer struts, between the middle oblique cable and the vertical middle struts, between the upper inner ring cable and the vertical middle struts, between the lower inner ring cable and the vertical middle struts, between the inner ridge cable and the vertical middle struts, between the inner ridge cable and the vertical inner struts, between the inner oblique cable and the vertical middle struts, and between the inner oblique cable and the vertical inner struts. Pins are provided between the ear plate seats and the ear plates.

[0008] Preferably, a steel cable preload monitoring component which is threadedly sleeved and fixed to the ear plate is provided between the ear plate and the outer oblique cable, upper middle ring cable, lower middle ring cable, middle ridge cable, middle oblique cable, upper inner ring cable, lower inner ring cable, inner ridge cable and inner oblique cable.

[0009] Preferably, the steel cable preload monitoring assembly comprises a monitoring tube body, a steel cable through hole is provided in the monitoring tube body, a cable shaft sleeve is provided between the steel cable through hole and the monitoring tube body and is nested with the monitoring tube body, and a locking clamp is provided on the monitoring tube body and is bolt-fastened with the cable shaft sleeve.

[0010] Preferably, a magnetic sensor is provided at the upper end of the locking clamp, a monitoring tube body is extended from the lower end of the locking clamp and a warning light is provided which is circuit-connected with the magnetic sensor, a slide groove is provided between the monitoring tube body and the cable shaft sleeve, a spring which is spaced apart from the cable shaft sleeve is provided in the slide groove, and a magnet ring which is inserted into the cable shaft sleeve and movably contacts and senses the magnetic sensor is provided on the end face of the spring.

[0011] Preferably, a threaded hole threadably connected to the ear plate is provided in the monitoring tube body, and the threaded hole is connected to the through hole of the steel cable.

[0012] Preferably, the construction method of the semi-rigid cable dome structure comprises the following steps:

[0013] Step 1: Install the outer ring beam welded with the support node, weld the lower end of the rigid outer ridge rod to the support node on the outer ring beam, and weld the upper end of the adjacent rigid outer ridge rod to the rigid node to form a rigid grid. Then weld the upper rigid middle ring rod to the upper end of the rigid outer ridge rod through the rigid node, and connect the rigid node to the upper middle ring cable through the ear plate and the pin. Then connect the upper end of the vertical outer support rod to the upper end of the rigid outer ridge rod through the ear plate and the pin, connect the upper end of the outer oblique cable to the support node on the outer ring beam through the ear plate and the pin, connect the lower end of the outer oblique cable to the lower end of the vertical outer support rod through the ear plate and the pin, connect the lower middle ring cable to the lower end of the vertical outer support rod through the ear plate and the pin, and tension the lower middle ring cable to form an outer ring structure. The connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction.

[0014] Step 2: Install the vertical inner support rod, and connect the upper end of the inner ridge cable with the upper end of the vertical inner support rod through the ear plate and the pin. Then install the vertical middle support rod, and connect the lower end of the inner ridge cable with the upper end of the vertical middle support rod through the ear plate and the pin. Then connect the upper end of the middle ridge cable with the upper end of the vertical middle support rod through the ear plate and the pin, and connect the lower end of the middle ridge cable to the tooling cable. Then connect the lower end of the inner oblique cable with the lower end of the vertical inner support rod through the ear plate and the pin. The connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction;

[0015] Step 3: Install the upper inner ring cable and the lower inner ring cable symmetrically in the order of upper first, lower second, inner first, outer second, and connect them to the upper and lower ends of the vertical center support rod through ear plates and pins. Then connect the upper end of the inner oblique cable to the upper end of the vertical center support rod through ear plates and pins, connect the lower end of the middle oblique cable to the node at the lower end of the vertical center support rod through ear plates and pins, and connect the ear plate at the upper end of the middle oblique cable to the tooling cable.

[0016] Step 4: As a whole, lift and tension the tooling cables of the middle ridge cable and the middle oblique cable, and connect the lower end of the middle ridge cable and the upper end of the middle oblique cable to the rigid outer ridge rod through the ear plate and the pin. The connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction; finally, tension the middle ridge cable to form the middle circle and inner circle structure.

[0017] Preferably, when assembling the ear plate, the wire rope preload monitoring assembly and the wire rope through-hoop fastening are first installed, and the magnet ring at the front end of the spring is stretched by the tensioning force of the wire rope to lock the hoop.

[0018] Preferably, when a certain section of the steel cable is fatigued, the magnet ring slides in the slide groove under the recovery force of the spring, and contacts and senses the magnetic sensor, causing the warning light to light up and alarm.

[0019] The present invention can achieve the following effects:

[0020] The present invention provides a semi-rigid cable dome structure and a construction method thereof, which, compared with the prior art, has the characteristics of high initial structural rigidity, easy rod positioning, large structural redundancy, low construction cost and low difficulty, and solves the problems of long construction period and poor quality reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0023] Figure 3 It is an axonometric view of the superstructure of the present invention.

[0024] Figure 4 It is an axonometric view of the lower structure of the present invention.

[0025] Figure 5 It is a schematic diagram of the connection structure between the steel cable and the rod member of the present invention.

[0026] Figure 6 It is a structural cross-sectional view of the steel cable preload monitoring assembly of the present invention.

[0027] In the figure: outer ring beam 1, rigid outer ridge rod 2, vertical outer support rod 3, outer oblique cable 4, upper rigid middle ring rod 5, upper middle ring cable 6, lower middle ring cable 7, middle ridge cable 8, vertical middle support rod 9, middle oblique cable 10, upper inner ring cable 11, lower inner ring cable 12, inner ridge cable 13, vertical inner support rod 14, inner oblique cable 15, steel cable preload monitoring assembly 16, ear plate seat 17, pin 18, ear plate 19, threaded hole 20, cable shaft sleeve 21, monitoring tube body 22, slide groove 23, magnetic sensor 24, spring 25, magnet ring 26, steel cable perforation 27, locking clamp 28, warning light 29. DETAILED DESCRIPTION

[0028] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0029] Example: Figure 1-6As shown, a semi-rigid cable dome structure includes a vertical inner support rod 14, six vertical middle support rods 9 distributed in a regular hexagon are arranged on the periphery of the vertical inner support rod 14, six vertical outer support rods 3 distributed in a regular hexagon are arranged on the periphery of the vertical middle support rod 9, six outer ring beams 1 distributed in a regular hexagon are arranged on the periphery of the vertical outer support rod 3, rigid outer ridge rods 2 are arranged between the two ends of the outer ring beam 1 and the upper ends of the vertical outer support rods 3, outer oblique cables 4 are arranged between the two ends of the outer ring beam 1 and the lower ends of the vertical outer support rods 3, and upper rigid middle ring rods 5 and upper middle ring cables 6 are arranged at intervals at the upper ends of two adjacent vertical outer support rods 3 A lower middle ring cable 7 is provided between the lower ends of two adjacent vertical outer struts 3, a middle ridge cable 8 is provided between the upper end of the vertical middle strut 9 and the upper ends of the two adjacent vertical outer struts 3, a middle oblique cable 10 is provided between the lower end of the vertical middle strut 9 and the upper ends of the two adjacent vertical outer struts 3, an upper inner ring cable 11 is provided between the upper ends of the two adjacent vertical middle struts 9, a lower inner ring cable 12 is provided between the lower ends of the two adjacent vertical middle struts 9, an inner ridge cable 13 is provided between the upper end of the vertical inner strut 14 and the upper end of the vertical middle strut 9, and an inner oblique cable 15 is provided between the lower end of the vertical inner strut 14 and the upper end of the vertical middle strut 9. The outer ring beam 1, the rigid outer ridge bar 2, and the 3 vertical outer braces are fixed with a welded ball node structure, the outer oblique cable 4 and the outer ring beam 1, the outer oblique cable 4 and the 3 vertical outer braces, the upper middle ring cable 6 and the 3 vertical outer braces, the lower middle ring cable 7 and the 3 vertical outer braces, the middle ridge cable 8 and the 3 vertical outer braces, the middle ridge cable 8 and the 9 vertical middle braces, the middle oblique cable 10 and the 3 vertical outer braces, the middle oblique cable 1 0 and the vertical middle support rod 9, between the upper inner ring cable 11 and the vertical middle support rod 9, between the lower inner ring cable 12 and the vertical middle support rod 9, between the inner ridge cable 13 and the vertical middle support rod 9, between the inner ridge cable 13 and the vertical inner support rod 14, between the inner oblique cable 15 and the vertical middle support rod 9, and between the inner oblique cable 15 and the vertical inner support rod 14 are all provided with an ear plate seat 17 and an ear plate 19, and a pin 18 is provided between the ear plate seat 17 and the ear plate 19. A steel cable preload monitoring component 16 threadedly sleeved and fixed with the ear plate 19 is provided between the ear plate 19 and the outer oblique cable 4, the upper middle ring cable 6, the lower middle ring cable 7, the middle ridge cable 8, the middle oblique cable 10, the upper inner ring cable 11, the lower inner ring cable 12, the inner ridge cable 13, and the inner oblique cable 15.

[0030] The wire rope preload monitoring assembly 16 includes a monitoring tube body 22, in which a threaded hole 20 is provided which is threadedly sleeved with the ear plate 19, and the threaded hole 20 is connected with the wire rope through hole 27. A wire rope through hole 27 is provided in the monitoring tube body 22, and a cable shaft sleeve 21 which is nested with the monitoring tube body 22 is provided between the wire rope through hole 27 and the monitoring tube body 22, and a locking clamp 28 which is bolted and sleeved with the cable shaft sleeve 21 is provided on the monitoring tube body 22. A magnetic sensor 24 is provided at the upper end of the locking clamp 28, a monitoring tube body 22 is extended from the lower end of the locking clamp 28 and a warning light 29 which is circuit-connected with the magnetic sensor 24 is provided, a slide groove 23 is provided between the monitoring tube body 22 and the cable shaft sleeve 21, a spring 25 which is sleeved with the cable shaft sleeve 21 in an interval manner is provided in the slide groove 23, and a magnet ring 26 which is inserted into the cable shaft sleeve 21 and movably contacts and senses with the magnetic sensor 24 is provided on the end face of the spring 25.

[0031] The construction method of the semi-rigid cable dome structure includes the following steps:

[0032] The first step: install the outer ring beam 1 welded with the support node, weld the lower end of the rigid outer ridge bar 2 to the support node on the outer ring beam 1, and weld the upper end of the adjacent rigid outer ridge bar 2 to the rigid node to form a rigid grid. Then the upper rigid middle ring rod 5 is welded to the upper end of the rigid outer ridge bar 2 through the rigid node, and the rigid node is connected to the upper middle ring cable 6 through the ear plate 19 and the pin 18. Then the upper end of the vertical outer support rod 3 is connected to the upper end of the rigid outer ridge bar 2 through the ear plate 19 and the pin 18, the upper end of the outer oblique cable 4 is connected to the support node on the outer ring beam 1 through the ear plate 19 and the pin 18, the lower end of the outer oblique cable 4 is connected to the lower end of the vertical outer support rod 3 through the ear plate 19 and the pin 18, the lower middle ring cable 7 is connected to the lower end of the vertical outer support rod 3 through the ear plate and the pin, and the lower middle ring cable 7 is tensioned to form an outer ring structure. The connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction.

[0033] Step 2: Install the vertical inner support rod 14, and connect the upper end of the inner ridge cable 13 with the upper end of the vertical inner support rod 14 through the ear plate 19 and the pin 18. Then install the vertical middle support rod 9, and connect the lower end of the inner ridge cable 13 with the upper end of the vertical middle support rod 9 through the ear plate 19 and the pin 18. Then connect the upper end of the middle ridge cable 8 with the upper end of the vertical middle support rod 9 through the ear plate 19 and the pin 18, and connect the lower end of the middle ridge cable 8 to the tooling cable; then connect the lower end of the inner oblique cable 15 with the lower end of the vertical inner support rod 14 through the ear plate 19 and the pin 18. The connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction.

[0034] Step 3: Install the upper inner ring cable 11 and the lower inner ring cable 12 symmetrically in the order of upper to lower, inner to outer, and respectively connect the upper and lower ends of the vertical middle support rod 9 through the ear plate 19 and the pin 18. Then connect the upper end of the inner oblique cable 15 to the upper end of the vertical middle support rod 9 through the ear plate 19 and the pin 18, connect the lower end of the middle oblique cable 10 to the node at the lower end of the vertical middle support rod 9 through the ear plate 19 and the pin 18, and connect the ear plate at the upper end of the middle oblique cable 10 to the tooling cable.

[0035] Step 4: As a whole, lift and tension the tooling cables of the middle ridge cable 8 and the middle oblique cable 10, and connect the lower end of the middle ridge cable 8 and the upper end of the middle oblique cable 10 to the rigid outer ridge rod 2 through the ear plate 19 and the pin 18; the connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction; finally, tension the middle ridge cable 8 to form a middle circle and inner circle structure.

[0036] When assembling the ear plate 19, first install the steel cable preload monitoring assembly 16 and the steel cable through the clamping hoop to tighten it, and use the tension of the steel cable to stretch the magnet ring 26 at the front end of the spring 25 to lock the clamping hoop 28. When a certain section of the steel cable is fatigued, the magnet ring 26 slides in the slide groove 23 under the recovery force of the spring 25, and contacts the magnetic sensor 24, so that the warning light 29 lights up to alarm.

[0037] In summary, the semi-rigid cable dome structure and its construction method have the characteristics of high initial structural stiffness, easy rod positioning, large structural redundancy, low construction cost and low difficulty, which solves the problems of long construction period and poor quality reliability.

[0038] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A semi-rigid cable dome structure, characterized in that: The invention comprises a vertical inner support rod (14), a plurality of vertical middle support rods (9) are arranged on the periphery of the vertical inner support rod (14), a plurality of vertical outer support rods (3) are arranged on the periphery of the vertical middle support rod (9), a plurality of outer ring beams (1) are arranged on the periphery of the vertical outer support rod (3), rigid outer ridge rods (2) are arranged between the two ends of the outer ring beam (1) and the upper ends of the vertical outer support rods (3), outer oblique cables (4) are arranged between the two ends of the outer ring beam (1) and the lower ends of the vertical outer support rods (3), upper rigid middle ring rods (5) and upper middle ring cables (6) are arranged at intervals at the upper ends of two adjacent vertical outer support rods (3), and lower rigid middle ring cables (5) and upper middle ring cables (6) are arranged between the lower ends of the two adjacent vertical outer support rods (3). A middle ring cable (7), a middle ridge cable (8) is provided between the upper end of the vertical middle support rod (9) and the upper ends of the two adjacent vertical outer support rods (3), a middle oblique cable (10) is provided between the lower end of the vertical middle support rod (9) and the upper ends of the two adjacent vertical outer support rods (3), an upper inner ring cable (11) is provided between the upper ends of the two adjacent vertical middle support rods (9), a lower inner ring cable (12) is provided between the lower ends of the two adjacent vertical middle support rods (9), an inner ridge cable (13) is provided between the upper end of the vertical inner support rod (14) and the upper end of the vertical middle support rod (9), and an inner oblique cable (15) is provided between the lower end of the vertical inner support rod (14) and the upper end of the vertical middle support rod (9); The outer ring beam (1), the rigid outer ridge bar (2), and the vertical outer support bar (3) are fixed by a welded ball node structure, and the outer oblique cable (4) and the outer ring beam (1), the outer oblique cable (4) and the vertical outer support bar (3), the upper middle ring cable (6) and the vertical outer support bar (3), the lower middle ring cable (7) and the vertical outer support bar (3), the middle ridge cable (8) and the vertical outer support bar (3), the middle ridge cable (8) and the vertical middle support bar (9), the middle oblique cable (10) and the vertical outer support bar (3), and the middle oblique cable (11) and the vertical outer support bar (3) are fixed by a welded ball node structure. Lug plate seats (17) and lug plates (19) are provided between the inner ridge cable (13) and the vertical middle support rod (9), between the upper inner ring cable (11) and the vertical middle support rod (9), between the lower inner ring cable (12) and the vertical middle support rod (9), between the inner ridge cable (13) and the vertical middle support rod (9), between the inner ridge cable (13) and the vertical inner support rod (14), between the inner oblique cable (15) and the vertical middle support rod (9), and between the inner oblique cable (15) and the vertical inner support rod (14), and a pin shaft (18) is provided between the lug plate seat (17) and the lug plate (19).

2. The semi-rigid cable dome structure according to claim 1, characterized in that: A steel cable preload monitoring assembly (16) which is threadedly sleeved and fixed to the ear plate (19) is provided between the ear plate (19) and the outer oblique cable (4), the upper middle ring cable (6), the lower middle ring cable (7), the middle ridge cable (8), the middle oblique cable (10), the upper inner ring cable (11), the lower inner ring cable (12), the inner ridge cable (13), and the inner oblique cable (15).

3. The semi-rigid cable dome structure according to claim 2, characterized in that: The steel cable preload monitoring assembly (16) comprises a monitoring tube body (22), a steel cable through hole (27) is provided in the monitoring tube body (22), a cable shaft sleeve (21) nested with the monitoring tube body (22) is provided between the steel cable through hole (27) and the monitoring tube body (22), and a locking clamp (28) is provided on the monitoring tube body (22) and is bolt-fastened with the cable shaft sleeve (21).

4. The semi-rigid cable dome structure according to claim 3, characterized in that: The upper end of the locking hoop (28) is provided with a magnetic sensor (24), the lower end of the locking hoop (28) extends out of a monitoring tube body (22) and is provided with a warning light (29) which is in electrical communication with the magnetic sensor (24), a slide groove (23) is provided between the monitoring tube body (22) and the cable shaft sleeve (21), a spring (25) which is sleeved with the cable shaft sleeve (21) in an interval manner is provided in the slide groove (23), and a magnet ring (26) which is inserted into the cable shaft sleeve (21) and is in movable contact and induction with the magnetic sensor (24) is provided on the end surface of the spring (25).

5. The semi-rigid cable dome structure according to claim 3, characterized in that: The monitoring tube body (22) is provided with a threaded hole (20) threadably sleeved with the ear plate (19), and the threaded hole (20) is connected to the steel cable through hole (27).

6. The construction method of the semi-rigid cable dome structure according to claim 4, characterized in that The steps are as follows: The first step is to install the outer ring beam (1) welded with the support node, weld the lower end of the rigid outer ridge rod (2) to the support node on the outer ring beam (1), and weld the upper end of the adjacent rigid outer ridge rod (2) to the rigid node to form a rigid grid; then weld the upper rigid middle ring rod (5) to the upper end of the rigid outer ridge rod (2) through the rigid node, and connect the rigid node to the upper middle ring cable (6) through the ear plate (19) and the pin (18); then connect the upper end of the vertical outer support rod (3) to the upper end of the rigid outer ridge rod (2); The ends are connected through ear plates (19) and pin shafts (18), the upper ends of the outer oblique cables (4) are connected to the support nodes on the outer ring beam (1) through ear plates (19) and pin shafts (18), the lower ends of the outer oblique cables (4) are connected to the lower ends of the vertical outer support rods (3) through ear plates (19) and pin shafts (18), the lower middle ring cables (7) are connected to the lower ends of the vertical outer support rods (3) through ear plates and pin shafts, and the lower middle ring cables (7) are tensioned to form an outer ring structure; the connection and assembly process is performed symmetrically in a clockwise or counterclockwise direction; Step 2: Install the vertical inner support rod (14), connect the upper end of the inner ridge cable (13) with the upper end of the vertical inner support rod (14) through the ear plate (19) and the pin (18); then install the vertical middle support rod (9), connect the lower end of the inner ridge cable (13) with the upper end of the vertical middle support rod (9) through the ear plate (19) and the pin (18); then connect the upper end of the middle ridge cable (8) with the upper end of the vertical middle support rod (9) through the ear plate (19) and the pin (18), and connect the lower end of the middle ridge cable (8) to the tooling cable; then connect the lower end of the inner oblique cable (15) with the lower end of the vertical inner support rod (14) through the ear plate (19) and the pin (18); the connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction; Step 3: Install the upper inner ring cable (11) and the lower inner ring cable (12) symmetrically in the order of upper first and lower second, inner first and outer second, and connect them to the upper and lower ends of the vertical middle support rod (9) through the ear plate (19) and the pin (18) respectively; then connect the upper end of the inner oblique cable (15) to the upper end of the vertical middle support rod (9) through the ear plate (19) and the pin (18), connect the lower end of the middle oblique cable (10) to the node at the lower end of the vertical middle support rod (9) through the ear plate (19) and the pin (18), and connect the ear plate at the upper end of the middle oblique cable (10) to the tooling cable; Step 4: hoist and tension the tooling cables of the middle ridge cable (8) and the middle oblique cable (10) as a whole, connect the lower end of the middle ridge cable (8) and the upper end of the middle oblique cable (10) to the rigid outer ridge rod (2) through the ear plate (19) and the pin shaft (18); the connection and assembly process is carried out symmetrically in a clockwise or counterclockwise direction; finally, tension the middle ridge cable (8) to form a middle circle and inner circle structure.

7. The construction method of the semi-rigid cable dome structure according to claim 6, characterized in that: When assembling the ear plate (19), the steel cable preload monitoring assembly (16) is first installed and fastened with the steel cable through the clamping hoop, and the magnet ring (26) at the front end of the spring (25) is stretched by the tensioning force of the steel cable to lock the clamping hoop (28).

8. The construction method of the semi-rigid cable dome structure according to claim 7, characterized in that: When a certain section of the steel cable is fatigued, the magnet ring (26) slides in the slide groove (23) due to the recovery force of the spring (25), and contacts and senses the magnetic sensor (24), causing the warning light (29) to light up and alarm.

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