Pneumatic shield gate dam

Abstract

The invention belongs to the technical field of pneumatic shield gate dams and relates to a pneumatic shield gate dam. The pneumatic shield gate dam comprises a shield plate, the bottom of the shieldplate is fixed to a foundation bottom plate, an air bag and an ornamental curtain for shielding the air bag are sequentially arranged on the back surface of the shield plate from front to back, and the air bag is used for driving the shield plate to move up and down. Wall protecting plates are arranged on left and right sides of the shield plate respectively, bidirectional side wall water-stop body groups are arranged between left and right sides of the shield plate and the corresponding wall protecting plates, the bottom of the shield plate is connected with the foundation bottom plate through a foundation soft connection belt, and a turbulence device is mounted at the top of the shield plate. The pneumatic shield gate dam is high in strength and abrasion resistance, great in water-stop effect and firm in connection with a concrete side wall, and vacuum formed in operation of the pneumatic shield gate dam in water can be prevented. In addition, the pneumatic shield gate dam has a damheight control function and is high in flexibility, less prone to breakage, long in service life and high in stability, the aging speed is reduced, an ornamental effect is achieved, flow breaking andturbulence can be realized while resonance is avoided, and accordingly high safety coefficient is achieved.

Description

technical field [0001] The invention relates to a gas shield dam and belongs to the technical field of gas shield dams. Background technique [0002] At present, the existing gas shield dams mainly include the following deficiencies: [0003] 1. There are some special conditions in the operating conditions of the gas shield dam in the river, such as the water level difference between the upstream and downstream of the gas shield dam in the water blocking operation state, or the downstream water level is higher than the upstream water level. Under such working conditions, the air shield dam is required not only to block the upstream water, but also to block the downstream backwater. To achieve two-way water blocking, the side wall waterstop needs to have the function of two-way water blocking. The general side wall The water stop can only block the upstream water. If the downstream water level is higher or exceeds the upstream water level, the water will flow from the side w...

AI Technical Summary

Problems solved by technology

[0005] 3. The soft connection belt of the foundation plays the role of water sealing between the bottom and the side wall during the raising and lowering of the gas shield dam, and it also has to bear the water pressure, the tensile force of the shield plate and the extrusion force of the anchor. In such a complex Under the condition of high stress, it also needs to withstand repeated flexing during the process of lifting the shield plate. The existing foundation soft connection belt is prone to cracks or even breaks, which affects the safety of the project.

[0006] The foundation soft connection belt needs to be drilled and integrated with the foundation soft connection pressure plate and the foundation anchor pressure plate. During the operation of the gas shield dam, the foundation soft connection belt bears water pressure, tensile force of the shield plate, etc., and the bolt holes will be pulled and deformed so that If the damage occurs, the foundation soft connection belt will fail to pull off from the foundation soft connection pressure plate or the foundation anchor pressure plate. During the normal operation of the gas shield dam, the foundation soft connection belt will bear the extrusion force of the anchor and will be anchored The problem of file cutting;

[0007] 4. When the air shield dam rises to retain water during the dry season of the river, if there is no overflow, the air bag and the restraint belt downstream of the air shield dam are exposed. The aging speed of the rubber airbag and the limiting belt reduces the service life of the air shield dam. The black airbag and the limiting belt are not coordinated with the colored shield, and the aesthetics are poor and not ornamental;

[0008] 5. With the continuous increase of dam height and dam length, and the increase of river water flow, resonance is inevitable. When resonance occurs, it will cause damage to the entire system of the gas shield dam, greatly improving the safety of the gas shield dam. If an accident occurs, the hazard will be more serious, causing immeasurable losses to people's production and life.

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