Air bag cover for foundation pit excavation

Abstract

The utility model belongs to the field of buildings, and discloses an air bag cover for foundation pit excavation, which comprises a safety net bag and an inflatable air bag, the safety net bag is arranged above a foundation pit, the periphery of the safety net bag is fixed on the periphery of the foundation pit, one side of the foundation pit can be provided with a door frame for an earthwork vehicle to enter and exit, and the safety net bag is fixed on the door frame. The inflatable air bags are filled with helium and located below the safety net bag, and the portion, below the safety net bag, of the inflatable air bags is filled with an air bag layer. The safety net bag is arranged to limit the inflatable air bag with the lifting force, the foundation pit cover with the dust falling and noise reduction effects can be rapidly built through the lifting force of the inflatable air bag and the safety net bag, compared with an existing foundation pit air film, prefabrication is not needed, the foundation pit cover can be rapidly built on site, and the situation that the foundation pit cover loses efficacy after the air bag is damaged does not need to be worried about.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building, concretely relates to a gas bag cover for foundation pit excavation. BACKGROUND

[0002] Most of the city buildings need to excavate foundation pits for pile cap construction. During the excavation process, the excavated earth needs to be pulled away by earthmoving vehicles. However, during the excavation process, the foundation pit will generate a large amount of dust, and the engineering machinery will also generate a large amount of noise. In order to solve this situation, the prior art proposes a "foundation pit air film" construction technology. The foundation pit air film is to cover a film above the foundation pit and then inflate the film. The air film is supported by the pressure difference between the inside and outside, thereby forming a closed working space similar to a dome. Although this foundation pit air film can close the foundation pit, it still has the following problems: the earthmoving vehicles need to continuously pull away the excavated earth, the positive pressure state in the air film is not easy to maintain, and the air blower needs to work continuously, which will generate a large amount of noise; secondly, each foundation pit needs to be customized with an air film that is suitable for its size, and the air film cannot be recycled, which results in high production cost; and the foundation pit air film can only be used for foundation pits with small areas and cannot be normally used for foundation pits with large areas; if the air film is damaged, the gas bag cover will be instantly disabled, and other problems will occur. In order to solve the above problems, a foundation pit protection scheme that is easy to use, convenient to lay, and reusable is needed. SUMMARY

[0003] The utility model discloses a gas bag cover for foundation pit excavation, which can adapt to foundation pits of various areas and is convenient to lay and maintain the dome state without the need for air blower and other equipment during use.

[0004] The utility model discloses a gas bag cover for foundation pit excavation, which can adapt to foundation pits of various areas and is convenient to lay and maintain the dome state without the need for air blower and other equipment during use.

[0005] A gas bag cover for foundation pit excavation includes a safety net bag and an inflatable air bag. The safety net bag is installed above the foundation pit and is fixed around the foundation pit. A door frame for the entry and exit of earthmoving vehicles can be processed on one side of the foundation pit. The safety net bag is fixed on the door frame. The inflatable air bag is filled with helium and is located below the safety net bag. Multiple inflatable air bags form an air bag layer below the safety net bag.

[0006] The inflatable air bag is in the shape of a long strip. The cross section of the inflatable air bag is circular, prismatic, pentagonal, or hexagonal. The length of the inflatable air bag is greater than twice the diameter.

[0007] The bottom of the inflatable air bag is provided with an inflation port. A counterweight is arranged at the inflation port to keep the inflatable air bag in a vertical state.

[0008] The inside of the inflatable air bag is a multi-cavity right prism structure, a plurality of vertical diaphragms are arranged on the central axis of the inflatable air bag to divide the inflatable air bag into a plurality of cavities, and a counterweight is arranged at the bottom of the inflatable air bag to maintain the direction of the inflatable air bag.

[0009] The air bag cover for foundation pit excavation has the beneficial effects that:

[0010] (1) The safety net bag is arranged to limit the inflatable air bag with lifting force, the lifting force of the inflatable air bag and the safety net bag can quickly build the foundation pit cover with dust and noise reduction effects, compared with the existing foundation pit air film, the foundation pit cover can be quickly built on site without precasting, and the foundation pit cover will not fail after the air bag is damaged;

[0011] (2) The long strip-shaped air bag can increase the gap path between the air bags, improve the blocking effect on dust, and also increase the transmission path of noise to improve the absorption effect on noise. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0013] Figure 1 Structure diagram of the present application Figure 1 .

[0014] Figure 2 Structure diagram of the present application Figure 2 .

[0015] Figure 3 Filling structure diagram of the inflatable air bag of the present application Figure 1 .

[0016] Figure 4 Filling structure diagram of the inflatable air bag of the present application Figure 2 .

[0017] Figure 5 The internal structure diagram of the inflatable air bag of the present application.

[0018] Markings in the figure: 1, safety net bag; 2, inflatable air bag; 3, portal frame; 4, foundation pit. DETAILED DESCRIPTION

[0019] As Figures 1-5As shown, the air bag cover for foundation pit 4 excavation provided by the embodiment comprises a safety net 1 and an inflatable air bag 2, the safety net 1 is installed above the foundation pit 4, the safety net 1 is fixed around the foundation pit 4, a portal frame 3 for earthmoving vehicle access is provided on one side of the foundation pit 4, the portal frame 3 can avoid scratching between the earthmoving vehicle and the safety net 1, and the safety of the air bag cover can be improved, the safety net 1 is fixed on the portal frame 3, the inflatable air bag 2 is filled with helium, and the inflatable air bag 2 is located below the safety net 1, a plurality of inflatable air bags 2 are filled to form an air bag layer below the safety net 1, the air bag layer can be used as an isolation layer to isolate the foundation pit 4 from the outside, and the dust suppression and noise reduction effects on the foundation pit 4 are improved.

[0020] In order to improve the laying efficiency, the inflatable air bag 2 is in a strip shape, the cross section of the inflatable air bag 2 is circular, prismatic, pentagonal or hexagonal, the length of the inflatable air bag 2 is greater than twice the diameter, and the diameter of the inflatable air bag 2 is 30-50 cm.

[0021] In order to improve the filling density of the air bag layer, the bottom of the inflatable air bag 2 is provided with an inflation port, a counterweight is arranged at the inflation port to keep the inflatable air bag 2 in a vertical state, the vertical inflatable air bag 2 can be closely arranged, the consistency of the inflatable air bag 2 is improved, and the thickness of the air bag layer is increased, and at the same time, the gap density between adjacent inflatable air bags 2 is reduced. Figure 3 、 Figure 4 As shown, the dust suppression and noise reduction effects can be further ensured.

[0022] In addition, a plurality of inflatable air bags 2 are adopted, and after one of the inflatable air bags 2 is broken, the remaining inflatable air bags 2 can be close to each other, and the staff only needs to supplement new inflatable air bags 2 from the periphery to ensure the density of the air bag layer.

[0023] In order to improve the structural strength of the inflatable air bag 2, the inflatable air bag 2 is in a multi-cavity right prism structure, as shown in the figure. Figure 5 As shown, the central axis of the inflatable air bag 2 is provided with a plurality of vertical diaphragms to divide the inflatable air bag 2 into a plurality of cavities, the bottom of the inflatable air bag 2 is provided with a counterweight to keep the direction of the inflatable air bag 2, the plurality of cavities can increase the service life of the inflatable air bag 2, and the inflatable air bag 2 can be made of transparent material to improve the light transmission effect of the air bag cover.

[0024] The use method of the utility model is as follows:

[0025] In use, the safety net 1 is laid around the foundation pit 4, a portal frame 3 is built at the entrance for the earth-moving vehicle and the engineering vehicle, then the safety net 1 is installed on the portal frame 3 and the outer side of the foundation pit 4, the safety net 1 is fixed on the outer side of the foundation pit 4 by anchor nails, then the inflatable air bag 2 is filled with helium, the inflatable air bag 2 can float up, finally the inflated inflatable air bag 2 is placed under the safety net 1, the safety net 1 is lifted by the inflatable air bag 2, and an air bag cover wrapping the foundation pit 4 is constructed to reduce the dust and noise in the construction process of the foundation pit 4, if the inflatable air bag 2 is broken, a new inflatable air bag 2 can be filled, which is convenient to maintain and can be recycled.

[0026] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, any modification and replacement based on the technical solutions and inventive concepts provided by the present application should be covered within the protection scope of the present application.

Claims

1. An airbag cover for foundation pit excavation, characterized in that: It includes a safety net (1) and an inflatable airbag (2). The safety net (1) is installed above the foundation pit (4). The safety net (1) is fixed around the foundation pit (4). A gantry (3) for dump trucks to enter and exit can be processed on one side of the foundation pit (4). The safety net (1) is fixed on the gantry (3). The inflatable airbag (2) is filled with helium and is located below the safety net (1). Multiple inflatable airbags (2) fill the airbag layer below the safety net (1).

2. The airbag cover for foundation pit excavation according to claim 1, characterized in that: The inflatable airbag (2) is elongated and has a cross-section that is circular, prismatic, pentagonal, or hexagonal. The length of the inflatable airbag (2) is greater than twice its diameter.

3. The airbag cover for foundation pit excavation according to claim 1 or 2, characterized in that: The inflatable airbag (2) has an inflation port at its bottom, and a counterweight is provided at the inflation port to keep the inflatable airbag (2) in a vertical position.

4. The airbag cover for foundation pit excavation according to claim 3, characterized in that: The inflatable airbag (2) has a multi-cavity regular prism structure inside. The central axis of the inflatable airbag (2) is provided with multiple vertical diaphragms that divide the inflatable airbag (2) into multiple cavities. The bottom of the inflatable airbag (2) is provided with a counterweight to maintain the direction of the inflatable airbag (2).

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