Cable net structure for ultra-large-span pneumatic membrane structure and laying method of cable net structure

Abstract

The invention discloses a cable net structure for a super-large-span pneumatic membrane structure, which comprises an airtight system, a plurality of split type pneumatic membranes, connecting buckles, transverse fixing cables, longitudinal fixing cables and base anchors, and the transverse fixing cables and the longitudinal fixing cables are arranged on the outer walls of the split type pneumatic membranes through ring buckles and serve as frameworks; the two ends of the transverse fixing cable and the two ends of the longitudinal fixing cable are fixed to the ground, the airtight system comprises a plurality of access control facilities, an air conditioning device and an air blowing mechanism, and after the split type inflatable membranes are connected and closed, the air membrane structure is inflated through the air blowing mechanism; the airtight system is preassembled at the design position of the cable net structure and is in airtight connection with the corresponding split type inflatable membrane; according to the invention, the air-supported air film building is arranged to realize frameless support, and is assembled by using the distribution of the split type inflatable film; the hoisting and block mounting form of the split type inflatable membrane is beneficial to covering of the high-rise structure, and subsequent butt joint of the whole air membrane structure is facilitated.

Description

Technical Field

[0001] The invention relates to the field of air membrane buildings, and in particular to a cable net structure for an ultra-large span air-filled membrane structure and a laying method thereof. Background Art

[0002] The advantage of air-supported buildings is that they can be supported without a frame, and the building is stable through air-bearing. Air pressure is provided for the interior of the completely enclosed air-supported building, so that the interior of the entire building always maintains a positive pressure against the external environment, thereby supporting the main body of the building by the pressure difference between the inside and the outside. Among them, relatively high requirements are placed on the inflatable membrane material to ensure its airtightness and constructability. The span of existing air-supported buildings is 100-200 meters, and no frame or beam support is required inside. After the construction is completed, the internal pressure changes need to be tracked.

[0003] The installation and design of the cable net structure are also very important, mainly in terms of how to cooperate with the structural requirements of the inflatable membrane structure. The requirements for air leakage of the air membrane, external air pressure changes, and the inlet and outlet of doors and windows are also high. When there are tall structures in the existing yard, it is difficult to solve the problems of assembly and positioning. The existing inflatable membrane structure is generally constructed directly on a flat site without other internal buildings, and the whole piece design and assembly can be realized. If there are many tall structures and the height and width exceed the construction requirements, other construction measures are needed to solve them. Summary of the invention

[0004] The object of the present invention is to provide a cable net structure for an ultra-large span inflatable membrane structure to solve the existing problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a cable net structure for an ultra-large span inflatable membrane structure, comprising an airtight system, a plurality of slice-type inflatable membranes, a connecting buckle, a transverse fixing cable, a longitudinal fixing cable and a base anchor, wherein the transverse fixing cable and the longitudinal fixing cable are arranged on the outer wall of the slice-type inflatable membrane through a ring buckle and serve as a skeleton, and the two ends of the transverse fixing cable and the longitudinal fixing cable are fixed on the ground, and the base anchor comprises a pad, a pressure plate and a bolt, and the pressure plate performs an airtight sealing on the bottom of the slice-type inflatable membrane and then is fixed by bolts; the airtight system comprises a plurality of access control facilities, an air conditioning device and a blowing mechanism, and after the slice-type inflatable membranes are all connected and sealed, the air membrane structure is inflated by the blowing mechanism; the airtight system is pre-installed at the designed position of the cable net structure and airtightly connected to the corresponding slice-type inflatable membrane, and the inflation operation is performed after all the connections are completed; The two sides of the split-type inflatable membrane are provided with connecting buckles and sealed and fixed, and the transverse fixing ropes and the longitudinal fixing ropes are passed through the outer wall of the split-type inflatable membrane to form an integral mesh membrane, and the base anchor is fixed after the integral connection is formed; The connecting buckle includes a long groove with a C-shaped cross-section arranged on one side of the slice-type inflatable membrane, and a long cylinder is arranged on one side of the corresponding slice-type inflatable membrane. The long groove is the same length as the long cylinder and is connected by plugging, and a telescopic bolt perpendicular to the surface is arranged on the inner wall of the long groove, and a card slot cooperating with the telescopic bolt is arranged on the surface of the long cylinder. The telescopic bolt is arranged in the inner cavity of the slice-type inflatable membrane through a telescopic button. When disassembling, the slice-type inflatable membrane can be unlocked through the slice-type inflation operation telescopic button after deflation, and then the telescopic bolt automatically pops out of the card slot, and the long groove and the long cylinder can be separated at this time; A closed diaphragm is arranged at the intersection where four split-type inflatable membranes are connected. The closed diaphragm is provided with a lower diaphragm, an upper diaphragm and a tightening device. During installation, the lower diaphragm and the upper diaphragm are clamped at the intersection by setting a membrane glue, and the upper and lower diaphragms are brought close to and pressed against the corners of the split-type inflatable membrane in the middle by the tightening device; It also includes a construction auxiliary structure, which includes pillars, lifting cables and a number of pulleys. When installing multiple sliced ​​inflatable membranes across a tall structure, the multiple sliced ​​inflatable membranes on the ground are installed first, and then the multiple sliced ​​inflatable membranes across the tall structure are installed. When installing multiple sliced ​​inflatable membranes across a tall structure, a number of pillars are pre-constructed on both sides of the corresponding tall structure, and lifting cables are preset on two opposite pillars. The height of the pillars is greater than the design height of the cable net structure. A number of pulleys are arranged on the lifting cables, and the pulleys are connected to corresponding liftable hooks. The multiple sliced ​​inflatable membranes are pre-installed on the transverse fixed cables through buckles, and then the corresponding sliced ​​inflatable membranes are raised to the tall structure through the hook-connected buckles to cover the corresponding components.

[0006] The airtight system also includes an air pressure detection system, which performs dynamic adjustment through an air blowing mechanism when insufficient air pressure is detected in the cable net structure. The access control facility, the air blowing mechanism and the air conditioning device are all provided with airtight devices to isolate the inner and outer spaces.

[0007] The sliced ​​inflatable membrane is a double-layer membrane structure, including an inner membrane and an outer membrane, with a connecting strap arranged between the inner membrane and the outer membrane, wherein a pressure regulating valve is arranged on the sliced ​​inflatable membrane. When the transverse fixing cables and the longitudinal fixing cables on the cable net structure become loose, the pressure regulating valves on part or all of the sliced ​​inflatable membranes can be operated to regulate the pressure, so that the transverse fixing cables and the longitudinal fixing cables on the cable net structure remain taut.

[0008] When the base anchor fixes the sliced ​​inflatable membrane at the bottom of the cable net structure, the pad is first installed along the designed position, and then the adjacent sliced ​​inflatable membranes are connected, and the pressure plate presses the bottom of the sliced ​​inflatable membrane onto the pad.

[0009] A method for laying out a cable net structure for an ultra-large span inflatable membrane structure is characterized in that: Step 1: Installation preparation, pre-leveling the site, designing the number of sliced ​​inflatable membranes according to the size of the inflatable membrane structure, pre-measuring the height and position of the towering structure, and installing an airtight system according to the functional requirements of the inflatable membrane structure, which includes multiple access control facilities, air conditioning devices and blowing mechanisms. The access control facilities, air conditioning devices and blowing mechanisms are all equipped with airtight devices to facilitate stable air pressure during entry and exit; Step 2: Construct auxiliary structures. According to the height and width of the tall structure, support the corresponding columns for subsequent lifting. Prepare lifting machinery and calculate the weight and area of ​​the sliced ​​inflatable membrane that needs to span the tall structure, as well as the number and weight of the transverse and longitudinal fixing cables. Select appropriate parameters of the crane, hook and lifting cable to ensure the lifting force requirements. Step 3: Assembling the sliced ​​inflatable membrane, set the number, length and anchoring position of the transverse fixing cables and the longitudinal fixing cables according to the size of the sliced ​​inflatable membrane, first connect the multiple sliced ​​inflatable membranes on the ground accordingly, then install the multiple sliced ​​inflatable membranes across the towering structure, and set a closed membrane at the intersection of the four sliced ​​inflatable membranes. The closed membrane is provided with a lower membrane, an upper membrane and a tightening device. During installation, the lower membrane and the upper membrane are clamped at the intersection by setting membrane glue, and the upper and lower membranes are brought close to and pressed against the corners of the sliced ​​inflatable membrane in the middle by the tightening device. When inflated, The expansion will cause the membranes to be compressed and meet the air tightness requirements; when installing multiple sliced ​​inflatable membranes across a tall structure, a lifting rope is preset on two opposite pillars, and a plurality of pulleys are arranged on the lifting rope, and the pulleys are connected to corresponding hooks that can be raised and lowered. A plurality of sliced ​​inflatable membranes are pre-threaded on the transverse fixing rope through a buckle, and then the corresponding sliced ​​inflatable membranes are raised to the tall structure to cover the corresponding components through the hook-connected buckle. After the sliced ​​inflatable membranes reach the predetermined position, they are spliced, and at this time, the threading of the transverse fixing rope is completed, and then the corresponding longitudinal fixing ropes are gradually threaded; Step 4: Anchoring. After the sliced ​​inflatable membranes of the entire construction site are installed, the structure is anchored; both ends of the transverse fixing cable and the longitudinal fixing cable are fixed on the ground, and the fixing point is set one meter outside the base anchor. The base anchor is used to fix the sliced ​​inflatable membrane connected as a whole, and the pressure plate seals the bottom of the sliced ​​inflatable membrane airtightly; Step 5: Sealing, testing and pressure adjustment. After the segmented inflatable membranes are connected and sealed, the inflation test inside the air membrane structure is carried out through the blowing mechanism. The airtight system is pre-installed at the designed position of the cable net structure and is airtightly connected to the corresponding segmented inflatable membranes. After all connections are completed, the inflation operation is carried out. The airtight system also includes an air pressure detection system. When the air pressure in the cable net structure is detected to be insufficient, dynamic adjustment is performed through the blowing mechanism. The access control facilities, blowing mechanism and air-conditioning device are all provided with airtight devices to isolate the internal and external spaces. When the transverse fixing cables and longitudinal fixing cables on the cable net structure are loose, the pressure regulating valves on some or all segmented inflatable membranes can be operated to adjust the pressure so that the transverse fixing cables and longitudinal fixing cables remain taut on the cable net structure.

[0010] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The present invention sets up an air-supported air-film building to achieve frameless support, and utilizes the distributed assembly of the segmented inflatable membrane, which is conducive to setting the structural layout and standardization requirements.

[0011] (2) The present invention facilitates the construction of auxiliary structures by setting hooks and lifting ropes to install the segmented inflatable membrane of the tall structure in stages. The segmented inflatable membrane can be lifted and installed in blocks, which is beneficial to the covering of the tall structure and facilitates the subsequent docking of the overall air membrane structure.

[0012] (3) When the air pressure is insufficient, the sliced ​​inflatable membrane of the present invention is configured as a double-layer inflatable form, and the air pressure of the sliced ​​inflatable membrane itself is controlled to facilitate adjustment of the tightness of the upper structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 is a schematic diagram of a sliced ​​inflatable membrane of the present invention; Figure 2 is a schematic diagram of a connecting buckle of the present invention; Figure 3 is a schematic diagram of the transverse fixing rope and the longitudinal fixing rope of the present invention; Figure 4 is a schematic diagram of a base anchor of the present invention; Figure 5 is a schematic diagram of the position of the closed membrane of the present invention; Figure 6 is a detailed schematic diagram of a closed membrane of the present invention; Figure 7 Schematic diagram of the high-rise structure membrane slice-type inflatable membrane of the present invention; Figure 8It is a flow chart of the deployment method of the present invention.

[0014] In the figure: 1. airtight system; 2. split inflatable membrane; 3. connecting buckle; 31. long groove; 32. long cylinder; 33. telescopic bolt; 34. slot; 4. horizontal fixing rope; 5. longitudinal fixing rope; 7. buckle; 8. base anchor; 81. pad; 82. pressure plate; 83. bolt; 9. closed diaphragm; 91. lower diaphragm; 92. upper diaphragm; 93. tightening device; 10. towering structure; 11. pillar; 12. lifting rope; 13. pulley; 14. hook. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] A cable net structure for an ultra-large span inflatable membrane structure, comprising an airtight system, a plurality of sliced ​​inflatable membranes, a connecting buckle, a transverse fixing cable, a longitudinal fixing cable and a base anchor, wherein the transverse fixing cable 4 and the longitudinal fixing cable 5 are arranged on the outer wall of the sliced ​​inflatable membrane 2 through a ring buckle 7 and serve as a skeleton, and the two ends of the transverse fixing cable 4 and the longitudinal fixing cable 5 are fixed on the ground. The base anchor 8 comprises a pad 81, a pressure plate 82 and a bolt 83, wherein the pressure plate 82 performs an airtight seal on the bottom of the sliced ​​inflatable membrane 2 and is then fixed by the bolt 83. The airtight system 1 comprises a plurality of access control facilities, an air conditioning device and a blowing mechanism, and after the sliced ​​inflatable membranes 2 are all connected and sealed, the air membrane structure is inflated by the blowing mechanism. The airtight system 1 is pre-installed at the designed position of the cable net structure and is airtightly connected to the corresponding sliced ​​inflatable membrane 2, and the inflation operation is performed after all the connections are completed.

[0017] The two sides of the slice-type inflatable membrane 2 are provided with connecting buckles 3 and sealed and fixed, and the transverse fixing ropes 4 and the longitudinal fixing ropes 5 are passed through the outer wall of the slice-type inflatable membrane 2 to form an integral mesh membrane, which is then fixed by the base anchor 8 after the integral connection is formed.

[0018] The connecting buckle 3 includes a long groove 31 with a C-shaped cross-section on one side of the slice-type inflatable membrane 2, and a long cylinder 32 is arranged on the side of the corresponding slice-type inflatable membrane 2. The long groove 31 is the same length as the long cylinder 32 and is connected by plugging. A telescopic bolt 33 perpendicular to its surface is arranged on the inner wall of the long groove 31, and a slot 34 cooperating with the telescopic bolt 33 is arranged on the surface of the long cylinder 32. The telescopic bolt 33 is arranged in the inner cavity of the slice-type inflatable membrane 2 through a telescopic button. When disassembled, the slice-type inflatable membrane 2 can be unlocked through the slice-type inflation operation telescopic button after deflation, and then the telescopic bolt 33 automatically pops out of the slot 34, and the long groove 31 and the long cylinder 32 can be separated.

[0019] A closed diaphragm 9 is arranged at the intersection where four split-type inflatable membranes 2 are connected. The closed diaphragm 9 is provided with a lower diaphragm 91, an upper diaphragm 92 and a tightening device 93. During installation, the lower diaphragm 91 and the upper diaphragm 92 are clamped at the intersection by setting membrane glue, and the upper and lower diaphragms are brought close to and pressed against the corners of the middle split-type inflatable membrane 2 by the tightening device 93.

[0020] It also includes a construction auxiliary structure, which includes pillars 11, lifting cables 12 and a number of pulleys 13. When installing a plurality of sliced ​​inflatable membranes 2 across a tall structure 10, first install the plurality of sliced ​​inflatable membranes 2 on the ground, and then install the plurality of sliced ​​inflatable membranes 2 across the tall structure 10. When installing a plurality of sliced ​​inflatable membranes 2 across a tall structure 10, a number of pillars 11 are pre-constructed on both sides of the corresponding tall structure 10, and lifting cables 12 are preset on two opposite pillars 11. The height of the pillars 11 is greater than the design height of the cable net structure. A number of pulleys 13 are arranged on the lifting cables 12, and correspondingly connected to the pulleys 13 are hooks 14 that can be raised and lowered. The plurality of sliced ​​inflatable membranes 2 are pre-installed on the transverse fixing cables 4 through the buckles 7, and then the corresponding sliced ​​inflatable membranes 2 are raised to the tall structure 10 to cover the corresponding components by connecting the buckles 7 through the hooks 14.

[0021] The airtight system 1 also includes an air pressure detection system, which performs dynamic adjustment through a blower mechanism when insufficient air pressure is detected in the cable net structure. The access control facility, blower mechanism and air conditioning device are all provided with airtight devices to isolate the inner and outer spaces.

[0022] The sliced ​​inflatable membrane 2 is a double-layer membrane structure, including an inner membrane and an outer membrane, and a connecting strap is arranged between the inner membrane and the outer membrane. A pressure regulating valve is arranged on the sliced ​​inflatable membrane 2. When the transverse fixing cables 4 and the longitudinal fixing cables 5 on the cable net structure become loose, the pressure regulating valves on part or all of the sliced ​​inflatable membranes 2 can be operated to adjust the pressure, so that the transverse fixing cables 4 and the longitudinal fixing cables 5 remain taut on the cable net structure.

[0023] When the base anchor 8 fixes the sliced ​​inflatable membrane 2 at the bottom of the cable net structure, the pad 81 is first installed along the designed position, and then the adjacent sliced ​​inflatable membranes 2 are connected, and the pressing plate 82 presses the bottom of the sliced ​​inflatable membrane 2 onto the pad 81.

[0024] In addition, a method for laying out a cable net structure for an ultra-large span inflatable membrane structure is provided, and the specific steps are as follows: Step 1: Installation preparation, pre-leveling the site, designing the number of sliced ​​inflatable membranes according to the size of the inflatable membrane structure, pre-measuring the height and position of the towering structure, and installing an airtight system according to the functional requirements of the inflatable membrane structure, which includes multiple access control facilities, air conditioning devices and blowing mechanisms. The access control facilities, air conditioning devices and blowing mechanisms are all equipped with airtight devices to facilitate stable air pressure during entry and exit; Step 2: Construct auxiliary structures. According to the height and width of the tall structure, support the corresponding columns for subsequent lifting. Prepare lifting machinery and calculate the weight and area of ​​the sliced ​​inflatable membrane that needs to span the tall structure, as well as the number and weight of the transverse and longitudinal fixing cables. Select appropriate parameters of the crane, hook and lifting cable to ensure the lifting force requirements. Step 3: Assembling the sliced ​​inflatable membrane, set the number, length and anchoring position of the transverse fixing cables and the longitudinal fixing cables according to the size of the sliced ​​inflatable membrane, first connect the multiple sliced ​​inflatable membranes on the ground accordingly, then install the multiple sliced ​​inflatable membranes across the towering structure, and set a closed membrane at the intersection of the four sliced ​​inflatable membranes. The closed membrane is provided with a lower membrane, an upper membrane and a tightening device. During installation, the lower membrane and the upper membrane are clamped at the intersection by setting membrane glue, and the upper and lower membranes are brought close to and pressed against the corners of the sliced ​​inflatable membrane in the middle by the tightening device. When inflated, The expansion will cause the membranes to be compressed and meet the air tightness requirements; when installing multiple sliced ​​inflatable membranes across a tall structure, a lifting rope is preset on two opposite pillars, and a plurality of pulleys are arranged on the lifting rope, and the pulleys are connected to corresponding hooks that can be raised and lowered. A plurality of sliced ​​inflatable membranes are pre-threaded on the transverse fixing rope through a buckle, and then the corresponding sliced ​​inflatable membranes are raised to the tall structure to cover the corresponding components through the hook-connected buckle. After the sliced ​​inflatable membranes reach the predetermined position, they are spliced, and at this time, the threading of the transverse fixing rope is completed, and then the corresponding longitudinal fixing ropes are gradually threaded; Step 4: Anchoring. After the sliced ​​inflatable membranes of the entire construction site are installed, the structure is anchored; both ends of the transverse fixing cable and the longitudinal fixing cable are fixed on the ground, and the fixing point is set one meter outside the base anchor. The base anchor is used to fix the sliced ​​inflatable membrane connected as a whole, and the pressure plate seals the bottom of the sliced ​​inflatable membrane airtightly; Step 5: Sealing, testing and pressure adjustment. After the segmented inflatable membranes are connected and sealed, the inflation test inside the air membrane structure is carried out through the blowing mechanism. The airtight system is pre-installed at the designed position of the cable net structure and is airtightly connected to the corresponding segmented inflatable membranes. After all connections are completed, the inflation operation is carried out. The airtight system also includes an air pressure detection system. When the air pressure in the cable net structure is detected to be insufficient, dynamic adjustment is performed through the blowing mechanism. The access control facilities, blowing mechanism and air-conditioning device are all provided with airtight devices to isolate the internal and external spaces. When the transverse fixing cables and longitudinal fixing cables on the cable net structure are loose, the pressure regulating valves on some or all segmented inflatable membranes can be operated to adjust the pressure so that the transverse fixing cables and longitudinal fixing cables remain taut on the cable net structure.

[0025] In actual construction, it is also necessary to comprehensively consider the wind force and air pressure changes on site to adjust the pressure inside the building and the segmented inflatable membrane to adapt to environmental changes.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cable net structure for an ultra-large span inflatable membrane structure, comprising an airtight system (1), a plurality of sliced ​​inflatable membranes (2), a connecting buckle (3), a transverse fixing cable (4), a longitudinal fixing cable (5) and a base anchor (8), wherein the transverse fixing cable (4) and the longitudinal fixing cable (5) are arranged on the outer wall of the sliced ​​inflatable membrane (2) through a ring buckle (7) and serve as a skeleton, and the two ends of the transverse fixing cable (4) and the longitudinal fixing cable (5) are fixed on the ground, and the base anchor (8) comprises a pad (81), a pressure plate (82) and a pressure plate (83). 2) and bolts (83), the pressure plate (82) air-tightly seals the bottom of the sliced ​​inflatable membrane (2) and then fixes it with bolts (83); the airtight system (1) includes multiple access control facilities, air conditioning devices and blowing mechanisms, and after the sliced ​​inflatable membranes (2) are connected and sealed, the air membrane structure is inflated by the blowing mechanism; the airtight system (1) is pre-installed at the designed position of the cable net structure and air-tightly connected to the corresponding sliced ​​inflatable membrane (2), and after all connections are completed, the inflation operation is performed; Features : Connecting buckles (3) are arranged on both sides of the slice-type inflatable membrane (2) and sealed and fixed, and transverse fixing ropes (4) and longitudinal fixing ropes (5) are passed through the outer wall of the slice-type inflatable membrane (2) to form an integral mesh membrane, and after the integral connection is formed, the base anchor (8) is fixed; The connecting buckle (3) comprises a long groove (31) with a C-shaped cross-section arranged on one side of the slice-type inflatable membrane (2), and a long cylinder (32) arranged on one side of the corresponding slice-type inflatable membrane (2). The long groove (31) and the long cylinder (32) are of the same length and are connected by plugging. A telescopic bolt (33) perpendicular to the surface of the long groove (31) is arranged on the inner wall of the long groove (31). A slot (34) cooperating with the telescopic bolt (33) is arranged on the surface of the long cylinder (32). The telescopic bolt (33) is arranged in the inner cavity of the slice-type inflatable membrane (2) through a telescopic button. When disassembling, the slice-type inflatable membrane (2) can be unlocked through the slice-type inflation operation telescopic button after deflation, and then the telescopic bolt (33) automatically pops out of the slot (34). At this time, the long groove (31) and the long cylinder (32) can be separated. A closed membrane (9) is arranged at the intersection where four split-type inflatable membranes (2) are connected. The closed membrane (9) is provided with a lower membrane (91), an upper membrane (92) and a tightening device (93). During installation, the lower membrane (91) and the upper membrane (92) are clamped at the intersection by setting membrane glue, and the upper and lower membranes are brought close to and pressed against the corners of the middle split-type inflatable membrane (2) by the tightening device (93); and a construction auxiliary structure is also included, which includes a support (11), a lifting rope (12) and a plurality of pulleys (13); When installing a plurality of sliced ​​inflatable membranes (2) across a tall structure (10), the plurality of sliced ​​inflatable membranes (2) on the ground are first installed, and then the plurality of sliced ​​inflatable membranes (2) across the tall structure (10) are installed. When installing the plurality of sliced ​​inflatable membranes (2) across the tall structure (10), a plurality of pillars (11) are pre-constructed on both sides of the corresponding tall structure (10), and hoisting ropes (12) are preset on two opposite pillars (11). The height of the pillars (11) is greater than the design height of the cable net structure. A plurality of pulleys (13) are arranged on the hoisting ropes (12), and corresponding liftable hooks (14) are connected to the pulleys (13). The plurality of sliced ​​inflatable membranes (2) are pre-installed on the transverse fixing ropes (4) through the ring buckles (7), and then the corresponding sliced ​​inflatable membranes (2) are raised to the tall structure (10) to cover the corresponding components by connecting the hooks (14) to the ring buckles (7).

2. The cable net structure for a super-large span inflatable membrane structure according to claim 1, characterized in that: The airtight system (1) also includes an air pressure detection system, which performs dynamic adjustment through an air blowing mechanism when insufficient air pressure is detected in the cable net structure. The access control facility, the air blowing mechanism and the air conditioning device are all provided with an airtight device that isolates the inner and outer spaces.

3. The cable net structure for a super-large span inflatable membrane structure according to claim 2, characterized in that: The sliced ​​inflatable membrane (2) is a double-layer membrane structure, including an inner membrane and an outer membrane, and a connecting strap is arranged between the inner membrane and the outer membrane, wherein a pressure regulating valve is arranged on the sliced ​​inflatable membrane (2). When the transverse fixing rope (4) and the longitudinal fixing rope (5) on the cable net structure are loose, the pressure regulating valve on part or all of the sliced ​​inflatable membrane (2) can be operated to adjust the pressure, so that the transverse fixing rope (4) and the longitudinal fixing rope (5) on the cable net structure remain in a taut state.

4. The cable net structure for a super-large span inflatable membrane structure according to claim 3, characterized in that: When the base anchor (8) fixes the sliced ​​inflatable membrane (2) at the bottom of the cable net structure, the pad (81) is first installed along the designed position, and then the adjacent sliced ​​inflatable membranes (2) are connected, and the pressing plate (82) presses the bottom of the sliced ​​inflatable membrane (2) against the pad (81).

5. A method for laying out a cable net structure for a super-long span inflatable membrane structure according to any one of claims 3-4, characterized in that it comprises the following steps: Step 1: Installation preparation, pre-leveling the site, designing the number of sliced ​​inflatable membranes according to the size of the inflatable membrane structure, pre-measuring the height and position of the towering structure, and installing an airtight system according to the functional requirements of the inflatable membrane structure, which includes multiple access control facilities, air conditioning devices and blowing mechanisms. The access control facilities, air conditioning devices and blowing mechanisms are all equipped with airtight devices to facilitate stable air pressure during entry and exit; Step 2: Construct auxiliary structures. According to the height and width of the tall structure, support the corresponding columns for subsequent lifting. Prepare lifting machinery and calculate the weight and area of ​​the sliced ​​inflatable membrane that needs to span the tall structure, as well as the number and weight of the transverse and longitudinal fixing cables. Select appropriate parameters of the crane, hook and lifting cable to ensure the lifting force requirements. Step 3: Assembling the sliced ​​inflatable membrane, set the number, length and anchoring position of the transverse fixing cables and the longitudinal fixing cables according to the size of the sliced ​​inflatable membrane, first connect the multiple sliced ​​inflatable membranes on the ground accordingly, then install the multiple sliced ​​inflatable membranes across the towering structure, and set a closed membrane at the intersection of the four sliced ​​inflatable membranes. The closed membrane is provided with a lower membrane, an upper membrane and a tightening device. During installation, the lower membrane and the upper membrane are clamped at the intersection by setting membrane glue, and the upper and lower membranes are brought close to and pressed against the corners of the sliced ​​inflatable membrane in the middle by the tightening device. When inflated, The expansion will cause the membranes to be compressed and meet the air tightness requirements; when installing multiple sliced ​​inflatable membranes across a tall structure, a lifting rope is preset on two opposite pillars, and a plurality of pulleys are arranged on the lifting rope, and the pulleys are connected to corresponding hooks that can be raised and lowered. A plurality of sliced ​​inflatable membranes are pre-threaded on the transverse fixing rope through a buckle, and then the corresponding sliced ​​inflatable membranes are raised to the tall structure to cover the corresponding components through the hook-connected buckle. After the sliced ​​inflatable membranes reach the predetermined position, they are spliced, and at this time, the threading of the transverse fixing rope is completed, and then the corresponding longitudinal fixing ropes are gradually threaded; Step 4: Anchoring. After the sliced ​​inflatable membranes of the entire construction site are installed, the structure is anchored; both ends of the transverse fixing cable and the longitudinal fixing cable are fixed on the ground, and the fixing point is set one meter outside the base anchor. The base anchor is used to fix the sliced ​​inflatable membrane connected as a whole, and the pressure plate seals the bottom of the sliced ​​inflatable membrane airtightly; Step 5: After the sliced ​​inflatable membranes are connected and sealed, the air membrane structure is inflated through the blowing mechanism; the airtight system is pre-installed at the designed position of the cable net structure and is airtightly connected to the corresponding sliced ​​inflatable membrane. After all connections are completed, the inflation operation is performed; the airtight system also includes an air pressure detection system, which performs dynamic adjustment through the blowing mechanism when it detects that the air pressure in the cable net structure is insufficient. The access control facilities, blowing mechanism and air-conditioning device are all provided with airtight devices to isolate the internal and external spaces; when the transverse fixing cables and the longitudinal fixing cables on the cable net structure become loose, the pressure regulating valves on some or all of the sliced ​​inflatable membranes can be operated to adjust the pressure so that the transverse fixing cables and the longitudinal fixing cables remain taut on the cable net structure.

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