Measurement of underground motion at the SSRF site.
For the Shanghai Synchrotron Radiation Facility (SSRF) and future Shanghai Free-Electron Laser projects, ground vibration is an important factor and, in order to attenuate it, the construction of a deep tunnel is under consideration. This paper concentrates on the investigation of ground vibration at different underground levels down to 60 m below surface, in order to understand the effect of vibration attenuation with depth. The effect of traffic is also studied using a 10 ton truck, with ground motion compared in different directions. Finally, a summary and some suggestions on these two projects are given.
Mechanical Engineering Group of Shanghai Institute of Applied Physics, Chinese Academy of Science, PO Box 800-204, Shanghai 201800, People's Republic of China. wangxiao73@gmail.com
Xiao
X
Wang
Liang
L
Chen
Han Wen
HW
Du
Li Xin
LX
Yin
D002681:China; D055593:Geological Phenomena; D005844:Geology; D018986:Motor Vehicles; D017356:Synchrotrons; D014732:Vibration