Why are some buildings along the subway line still so noisy with their windows closed? How to deal with it? Let's find out from the comparison of the two pictures below!
The vibration generated by the operation of transportation infrastructure such as the subway will cause the surrounding building structure to produce obvious vertical vibration, which will seriously affect the comfort and health of the people in the building, especially some lightweight steel screens, metal cup covers, decorations and other objects inside the building may also resonate to produce secondary noise, which is difficult to prevent.
What makes people feel more deeply is that some floors, some house types, some rooms because of the characteristics of their resonance, its secondary vibration noise is to be larger, and because this vibration is transmitted in the building structure, there is quite the feeling of "fighting cattle across the mountain", so even if the window is closed very tightly, it is only "scratching the boots" is useful for the primary vibration noise, and is of little use for the secondary vibration noise. In this case, we can use very effective vibration isolation measures to create a "barrier" from the path of vibration propagation (building structure) to improve the comfort of building occupants. At the same time, there is a high risk in most areas of China, and we must pay attention to the seismic safety of the structure when developing. To sum up, the seismic and vibration dual control technology can perfectly cope with the severe challenges brought by the above situation, and is of great significance for supporting urban TOD development.