Double-layer air pillow type foundation pit air film system

Abstract

The utility model relates to the technical field of air film buildings, and particularly provides a double-layer air pillow type foundation pit air film system which comprises an air film body, a high-strength steel cable, a concrete base, a fixing piece, inflation and deflation equipment and a PLC full-intelligent control system. The gas film main body comprises a gas film outer film and a gas film inner film; a space is arranged between the gas film outer film and the gas film inner film to form a double-layer gas film inner cavity; the concrete bases are arranged on the two opposite sides of the foundation pit. The gas film main body is arranged above the foundation pit, and the two sides of the gas film main body are erected on concrete bases on the two sides of the foundation pit; the high-strength steel cable is laid on the gas film main body; a fixing piece is arranged on the concrete base; the fixing piece fixes the gas film body to the concrete base in a sealed mode and is further connected with the high-strength steel cable. The utility model has the advantages of environmental protection, energy conservation, emission reduction, improvement of construction efficiency, guarantee of construction safety and the like.

Description

Technical Field

[0001] This utility model belongs to the field of air-supported membrane building technology, specifically relating to a double-layer air-cushion type foundation pit air-supported membrane system. Background Technology

[0002] Traditional foundation pit construction often faces problems such as dust and noise pollution, which not only seriously affect the construction site environment but also potentially negatively impact the lives and health of nearby residents. To address these issues, inflatable membrane structures have been increasingly applied to foundation pit engineering and sports stadiums, primarily as temporary structures. Currently, air-supported membrane structures are the most common. Air-supported membrane structures rely on the internal and external pressure difference generated by inflation to maintain their shape, requiring a large space with strong airtightness. However, ensuring this airtightness is difficult in practice, necessitating continuous inflation to maintain the pressure difference. This continuous, high-flow-rate inflation generates significant noise pollution. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a double-layer air-cushion type foundation pit air film system to solve the problems of dust and noise pollution generated during traditional foundation pit construction, while improving construction efficiency and construction safety.

[0004] This utility model proposes a double-layer air-cushion type air-supported membrane system for foundation pits, comprising: an air-supported membrane body, high-strength steel cables, a concrete base, fixing components, an inflation / deflation device, and a PLC fully intelligent control system; the air-supported membrane body includes an outer air-supported membrane and an inner air-supported membrane; a space is provided between the outer and inner air-supported membranes to form a double-layer air-supported membrane cavity; the air supply channels of the double-layer air-supported membrane cavity are concentrated in one or more openings, which are connected to the inflation / deflation device; the PLC fully intelligent control system is equipped with multiple sensors, which are disposed on the double-layer air-supported membrane. Inside the cavity, the air pressure value inside the double-layer air membrane is monitored; the PLC fully intelligent control system is also electrically connected to the inflation and deflation equipment; the concrete base is set on opposite sides of the foundation pit; the air membrane body is set above the foundation pit, and the two sides of the air membrane body are erected on the concrete base on both sides of the foundation pit; the high-strength steel cable is laid on the air membrane body; the fixing component is set on the concrete base; the fixing component seals and fixes the air membrane body to the concrete base, and the fixing component is also connected to the high-strength steel cable.

[0005] Furthermore, the outer air-film membrane covers the inner air-film membrane, and the edge of the outer air-film membrane is sealed to the edge of the inner air-film membrane.

[0006] Furthermore, the fixing component includes an angle steel and a first bolt assembly; the angle steel is pressed against the edge of the air-supported membrane body, and the first bolt assembly includes a bolt for fixing the angle steel and a nut for fixing the angle steel; the bolt for fixing the angle steel passes through the angle steel and the air-supported membrane body and is anchored in the concrete base.

[0007] Furthermore, the fastener also includes a second bolt assembly; the second bolt assembly connects the high-strength steel cable and the angle steel.

[0008] Furthermore, the second bolt assembly includes a bolt for fixing the steel cable and a nut for fixing the steel cable; one end of the bolt for fixing the steel cable is anchored to the side wall of the angle steel; the end of the high-strength steel cable is provided with a cable connector, the cable connector is fitted onto the bolt for fixing the steel cable, and the nut for fixing the steel cable is threadedly engaged with the bolt for fixing the steel cable and presses the cable connector.

[0009] Furthermore, the foundation pit air-supported membrane system also includes a backup generator; the backup generator is electrically connected to the PLC fully intelligent control system and the air filling and discharging equipment.

[0010] Furthermore, the foundation pit air-supported membrane system also includes a lighting system, which is located inside the air-supported membrane body and electrically connected to the PLC fully intelligent control system.

[0011] Furthermore, the foundation pit air-supported membrane system also includes a fresh air exchanger, which is electrically connected to the PLC fully intelligent control system.

[0012] Furthermore, the foundation pit air-supported membrane system also includes personnel access doors, logistics doors, and emergency doors located on one side of the air-supported membrane body.

[0013] The beneficial effects of this invention include: by configuring a double-layered air-supported membrane cavity within the main body and connecting it to inflation and deflation equipment, dust and noise during construction are effectively isolated, significantly improving the construction environment, reducing the impact on the surrounding environment and residents, and benefiting environmental protection and residents' health. The system's PLC fully intelligent control system can monitor and intelligently adjust the environmental parameters inside the air-supported membrane in real time, ensuring a stable construction environment and reducing energy consumption, achieving the goal of energy conservation and emission reduction. Simultaneously, the modular design of the system makes installation, disassembly, and maintenance more convenient, improving construction efficiency. Furthermore, the application of high-strength steel cables and angle steel connection structures enhances the safety and stability of the air-supported membrane, reduces stress, and effectively prevents damage caused by severe weather or accidents during construction, ensuring the safety of construction personnel. In addition, the introduction of a backup generator ensures that the air-supported membrane system can continue to operate stably in the event of a power outage or power failure, avoiding construction interruptions due to power problems and further improving construction efficiency. Finally, the lighting system provides uniform, glare-free lighting inside the foundation pit, improving the working environment for construction personnel and enhancing work comfort and safety. Meanwhile, the detachable sand and wind barriers provide additional dust protection in severe weather, further enhancing the system's practicality and adaptability.

[0014] In summary, the double-layer air-cushion type air-supported membrane system for foundation pits of this utility model has many beneficial effects, such as significant environmental protection, energy conservation and emission reduction, improved construction efficiency, and guaranteed construction safety. It is an efficient, environmentally friendly, and safe solution for foundation pit construction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the double-layer air-cushion type foundation pit air-film system of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 3 for Figure 1 A partially enlarged structural diagram showing the connection between the air-supported membrane structure, the concrete base, and the fasteners.

[0018] In the diagram: 1-Double-layer air-supported membrane inner cavity; 2-High-strength steel cable; 3-Fresh air exchanger; 4-Logistics door; 5-PLC fully intelligent control system; 6-Inflation and deflation equipment; 7-Outer membrane of the air-supported membrane; 8-Inner membrane of the air-supported membrane; 9-Angle steel; 10-Bolts for fixing angle steel; 11-Nuts for fixing angle steel; 12-Bolts for fixing steel cable; 13-Nuts for fixing steel cable; 14-Steel cable connector; 15-Concrete base; 20-Backup generator; 21-Lighting system; 25-Personnel entrance / exit; 30-Emergency door. Detailed Implementation

[0019] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] like Figures 1-3 The illustrated double-layer air-supported membrane structure for a foundation pit includes an air-supported membrane body, high-strength steel cables 2, personnel access doors 25, logistics doors 4, emergency doors 30, a PLC fully intelligent control system 5 located on the outside of the air-supported membrane body, inflation / deflation equipment 6, a backup generator 20, a fresh air exchanger 3, and a lighting system 21 located on the inside of the air-supported membrane body. The air-supported membrane body includes an outer membrane 7 and an inner membrane 8. The outer membrane 7 and the inner membrane 8 are partially stitched together to form several independent double-layer air-supported membrane cavities 1. The air supply channels of all double-layer air-supported membrane cavities 1 are concentrated into one or more openings, which are connected to the inflation / deflation equipment 6, allowing one or more equipment to inflate or deflate the air-supported membrane. The PLC fully intelligent control system 5 is located on the outside of the air-supported membrane for easy monitoring of real-time data by management personnel. This system operates through multiple sensors placed within the double-layer air-supported membrane cavities. The backup generator 20 intervenes promptly in the event of a power outage or power supply failure to ensure the continuous and stable operation of the air-supported membrane.

[0021] The fixing components include angle steel 9, bolts 10 for fixing the angle steel, nuts 11 for fixing the angle steel, bolts 12 for fixing the steel cable, nuts 13 for fixing the steel cable, steel cable connectors 14, high-strength steel cable 2, and a concrete base 15. At the fixing components, the outer membrane 7 and the inner membrane 8 of the air-supported membrane are sealed at the edges. The angle steel 9 is pressed onto the main body of the air-supported membrane. The bolts 10 and nuts 11 for fixing the angle steel firmly fix the concrete base 15, the main body of the air-supported membrane, and the angle steel 9 together. The high-strength steel cable 2 is firmly fixed to the angle steel 9 by the bolts 12, nuts 13, and connectors 14. This allows the high-strength steel cable 2 to transfer the force on the membrane surface, greatly reducing the stress on the membrane. The high-strength steel cable 2 is also connected to the concrete base 15 around the foundation pit through the angle steel 9, which evenly distributes the upward force of the air-supported membrane onto the concrete base 15, enabling the air-supported membrane to have the fastest installation and dismantling speed.

[0022] The construction steps of the foundation pit air-supported membrane system of this utility model are as follows:

[0023] Step 1: Place the air-supported membrane structure on the approximate location of the excavation pit, and then adjust the air-supported membrane structure to the accurate position using the positioning points.

[0024] Step 2: Press the air-supported membrane body down with angle steel 9, and use bolts 10 and nuts 11 to fix it firmly to the concrete base 15 around the foundation pit. The fixing sequence is to start from a corner of the air-supported membrane body and fix it in one direction along the perimeter of the foundation pit.

[0025] Step 3: Take the calculated length of high-strength steel cable 2 and lay it on the air-supported membrane structure along the shorter span of the foundation pit. Secure both ends of the high-strength steel cable 2 to the angle steel using cable fixing bolts 12, cable fixing nuts 13, and cable connectors 14. The cable connectors 14 have a ring-shaped sleeve structure and are fitted onto the cable fixing bolts 12.

[0026] Step 4: Connect one or more inflation / deflation devices 6 to the inflation port, connect the power supply, turn on the machine, and the device will inflate the inner cavity 1 of the double-layer air membrane according to the program. After reaching the set air pressure, the inflation will stop. The device will automatically inflate again after the air pressure in the inner cavity 1 of the double-layer air membrane drops to a certain value, so as to ensure that the air pressure in the inner cavity 1 of the double-layer air membrane is always maintained within a stable range that can support the air membrane system.

[0027] Step 5: After the air pressure inside the double-layer air membrane reaches a stable value, the air membrane body is formed. At this time, the PLC fully intelligent control system 5, the backup generator 20, the fresh air exchanger 3, and the lighting system 21 set inside the air membrane can be installed in sequence. After all systems are installed, overall debugging can be carried out until the environment inside the air membrane meets the required standards for operation.

[0028] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A double-layer air-cushion type foundation pit air-supported membrane system, characterized in that, include: The system comprises an air-supported membrane structure, high-strength steel cables, a concrete base, fasteners, inflation / deflation equipment, and a PLC fully intelligent control system; the air-supported membrane structure includes an outer air-supported membrane and an inner air-supported membrane. A space is provided between the outer and inner air-supported membranes to form a double-layered air-supported membrane cavity; the air supply channels of the double-layered air-supported membrane cavity are concentrated in one or more openings, which are connected to the inflation / deflation equipment; the PLC fully intelligent control system is equipped with multiple sensors, which are installed inside the double-layered air-supported membrane cavity to monitor the air pressure value inside the cavity; the PLC fully intelligent control system is also electrically connected to the inflation / deflation equipment; the concrete bases are located on opposite sides of the foundation pit; the air-supported membrane body is located above the foundation pit, and its two sides are supported on the concrete bases on both sides of the foundation pit; the high-strength steel cable is laid on the air-supported membrane body; the fixing component is provided on the concrete base; the fixing component seals and fixes the air-supported membrane body to the concrete base, and the fixing component is also connected to the high-strength steel cable.

2. The double-layer air-cushion type foundation pit air-film system according to claim 1, characterized in that, The outer air-film membrane covers the inner air-film membrane, and the edge of the outer air-film membrane is sealed to the edge of the inner air-film membrane.

3. The double-layer air-cushion type foundation pit air-film system according to claim 1, characterized in that, The fastener includes an angle steel and a first bolt assembly; the angle steel is pressed against the edge of the air-supported membrane body, and the first bolt assembly includes a bolt for fixing the angle steel and a nut for fixing the angle steel; the bolt for fixing the angle steel passes through the angle steel and the air-supported membrane body and is anchored in the concrete base.

4. The double-layer air-cushion type foundation pit air-film system according to claim 3, characterized in that, The fastener also includes a second bolt assembly; the second bolt assembly connects the high-strength steel cable and the angle steel.

5. The double-layer air-cushion type foundation pit air-film system according to claim 4, characterized in that, The second bolt assembly includes a bolt for fixing the steel cable and a nut for fixing the steel cable; one end of the bolt for fixing the steel cable is anchored to the side wall of the angle steel; the end of the high-strength steel cable is provided with a cable connector, the cable connector is fitted onto the bolt for fixing the steel cable, and the nut for fixing the steel cable is threadedly engaged with the bolt for fixing the steel cable and presses the cable connector.

6. The double-layer air-cushion type foundation pit air-film system according to claim 1, characterized in that, The foundation pit air-supported membrane system also includes a backup generator; the backup generator is electrically connected to the PLC fully intelligent control system and the air filling and discharging equipment.

7. The double-layer air-cushion type foundation pit air-film system according to claim 1, characterized in that, The foundation pit air-supported membrane system also includes a lighting system, which is located inside the air-supported membrane body and electrically connected to the PLC fully intelligent control system.

8. The double-layer air-cushion type foundation pit air-film system according to claim 1, characterized in that, The foundation pit air-supported membrane system also includes a fresh air exchanger, which is electrically connected to the PLC fully intelligent control system.

9. The double-layer air-cushion type foundation pit air-film system according to claim 1, characterized in that, The foundation pit air-supported membrane system also includes personnel access doors, logistics doors, and emergency doors located on one side of the air-supported membrane body.

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