What Are the Structures of Shenyang Air-Cushioned Shield Sluices?

What are the structures of Shenyang air shield gate? Today, let's give you a detailed explanation. Partners who want to learn can come with us to understand! It is mainly composed of civil works, steel shields, rubber airbags, anchors, air charging and discharging facilities and control systems. 1. The air shield dam in civil engineering can be directly reconstructed on the basis of the original rubber dam and cement flap dam, or directly heightened on the basis of the original concrete dam. 2. The material structure of steel shield plate Shenyang air shield gate is composed of panel, stiffener and restraining belt. The panel is made of high-strength structural steel with a thickness of more than 12mm, and the reinforcing ribs are welded on the water surface. Each unit is 5m long, and the units are connected with high-strength rubber composite tape. When the gate is fully raised, there is some included angle with the horizontal plane, which ensures that the door structure can fall down by its own weight. In order to better protect the airbag in the case of lodging, the gate plate is designed with radian. In normal operation, the pneumatic shield rubber dam allows the top to overflow, forming a water landscape. In order to prevent the gate from toppling upstream when the water level on the downstream side is high or under the action of wind, the downstream side of the gate body is provided with a foldable restraining belt made of synthetic rubber with high strength.

 

 

3. Rubber Airbag
The inner layer is made of high-air-tightness materials, the framework material is high-strength aramid fiber material, and the outer covering rubber adopts aging-resistant and ozone-resistant rubber materials. Both pneumatic shield rubber dams and conventional rubber dams operate relying on airbags, yet they differ greatly in service life due to completely distinct materials and performances. The airbag of the pneumatic shield rubber dam is composed of three layers: inner, middle and outer layers. The inner layer is polyester fiber-reinforced synthetic rubber, the middle layer is single-component synthetic rubber, and the outer layer is mixed rubber resistant to ozone and ultraviolet rays. Research and comparison show that there are prominent differences between the two in material composition as well as physical and mechanical properties, so the dam bags of rubber dams cannot replace the airbags of pneumatic shield gates. In consideration of flexible operation, reliable operation and long service life, the airbags for pneumatic shield gates are adopted.
4. Anchoring Components
The connection between inflatable airbags and supporting structures is one of the core technologies of the product. Firstly, fix root angle steels, main anchor bolts and wedge angle steels on the river bed, and pour concrete after position adjustment. Cast fixtures are connected with main anchor bolts and supported on root angle steels. The airbags are placed on wedge angle steels with their tops flipped to the upstream side of the face slab, fastened and compressed by cast fixtures, and fixed to the gate body through hinge cover plates and pressure plates.
5. Inflation and Deflation Facilities and Control System
Composition of Shenyang pneumatic shield gate system: including fans, gas storage tanks and control valves; air dryers are additionally equipped for cold regions, along with control valve parts, control sensors, pipelines and accessories. It supports three control modes: automatic control, manual control and combined automatic-manual control. It features short deflation time, which is approximately 10 to 30 minutes.