Before the ultrasonic welding machine was applied to the tunnel waterproof engineering, the leakage of railway tunnel was a common problem. Because the construction conditions of railway tunnel are difficult and difficult, it is not as convenient as using ultrasonic plastic welding machine, so the application of welding technology is limited. If the hot plate welding machine is used for construction, the fusion technology can not meet the needs of construction. With the continuous improvement of ultrasonic welding machine model and technology, it is more and more widely used in tunnel waterproof.

The application of ultrasonic welding machine in tunnel waterproof is to perfectly integrate the waterproof board and gasket without leaving a gap. At present, the main way to prevent leakage of railway tunnel is to set up "three lines of defense", that is, grouting of surrounding rock, laying of waterproof layer and installation of lined waterstop. After years of construction experience, it can be known that laying waterproof layer is a more effective waterproof method in the "three lines of defense", and its construction quality plays a decisive role in preventing water leakage in the tunnel. In the past, hot plate welding machine technology was usually used for the fusion of waterproof board and gasket, but the melting point process of waterproof board and gasket affected the construction quality, so it is difficult to accurately grasp the welding time and welding strength in the operation process. Ultrasonic plastic welding machine can meet such construction quality, but the operation conditions of previous models are relatively strict and cannot be carried out in the same track. Later, in order to improve the welding quality of waterproof board and avoid problems such as welding coke and welding penetration, people have continuously studied and improved the ultrasonic welding machine, and then it can be used in tunnel construction.

Now ultrasonic welding machine is often used in tunnel waterproof construction, so that the laying of waterproof layer in tunnel has higher quality assurance, and the welding quality problem of hot plate welding machine is solved. Because of the continuous reform of science and technology, the railway construction party can simply and conveniently use ultrasonic technology to solve the integration problem of waterproof boards like using ultrasonic plastic welding plastic materials in factories. It is hoped that in the future production work, ultrasonic welding machine will be applied to more fields and provide more services for mankind.