2011/07/0403:23source: YNET.com Internet - Beijing Youth Daily Fan Hongwei
Report from our correspondent is building the subway line ten will use the " pure homebred" damping spring floating track bed vibration technology to reduce the noise and vibration of the objective, which will break the foreign underground shock absorption technology in the city's monopoly. This is a reporter in the City Labor Protection Institute of national environmental protection city noise and vibration control engineering technology center building inspection will be informed.
Reportedly, the city subway had earlier used damping facilities all imported from abroad, not only the price is high, but also take a technology block method. In the Municipal Science and Technology Commission support center, noise in 2007launched a damping spring floating track bed vibration technology research and development, and in 2009March in metro line four old summer palace to the north east gate section laid 180 meters in the test section, the results show that, when the subway passes, the damping spring vibration isolator can as the weight of train dynamic subsidence of 4 mm, reduce noise generated by vibration of 20 db.