Introduction to the Comparative Analysis of the Reliability and Hazards of Steel Dams in Domestic Air - shield Dams

The holiday has ended. Have you fully relaxed? After relaxation, it's also good to learn more knowledge. Now, let's take a look at the comparative analysis of the reliability and hazards of steel dams in domestic air - shield dams.

Generally, a rubber dam needs to build an air - supply station or a pump house, with numerous and complex pipelines. In contrast, a steel dam is only equipped with two driving devices. This type of driving device is a new - style one. It has a simple structure and is easy to operate. There is no need for auxiliary facilities such as oil pipes and pumping stations. Moreover, this driving device is equipped with a manual operation device. In case of power failure or other malfunctions, it can be manually operated with only 5 kg of force. This effectively ensures that the dam can be lowered when needed and raised when required, demonstrating a high level of reliability.

According to the "Design Specifications" and actual usage, for rubber dams, once ice forms in winter, ice - breaking work must be carried out. Otherwise, it will cause fatal damage to the rubber dam. The ice - breaking work is completely manual, which is time - consuming and labor - intensive, and also brings great inconvenience to management. When the ice thaws in spring, ice floes cannot overflow on the rubber dam, and the solid and sharp ice is likely to tear the rubber dam. In winter, if the steel dam is inclined at a specific angle, when ice forms, the ice layer can extend upward along the slope, effectively releasing the expansion force generated by the freezing of water. As a result, the steel dam will not be damaged. Additionally, due to the hardness of the steel itself, during the spring ice - flood season, floodwater can be discharged over the dam crest, and the steel dam can endure winter easily.

The surface of steel dams in domestic air - shield dams is hot - sprayed with zinc in accordance with the "Standard Specifications for the Manufacture of Steel Gates in Water Conservancy and Hydropower Projects". The adhesion is extremely strong. The results of institutional research indicate that when the flow velocity of sand is 8 ≤ m/s, it will not damage the zinc layer. The flow velocity of general rivers is unlikely to reach this speed.

The design specifications for rubber dams require the bottom sill of the dam to be 20 cm high. Moreover, when the dam is lowered, the water in the rubber dam cannot be completely drained, forming a height of not less than 20 cm. The sum of these two factors results in a water - blocking cross - section of not less than 40 cm in the river cross - section when the dam is lowered, seriously affecting the flood - discharge flow. However, steel dams have no such impact.

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