Railway tunnel construction vibration testing project
The newly-built Qinghuayu No. 2 tunnel is located in Qinghuayu Town, Yan'an City, Shaanxi Province. The vibration effect induced by blasting construction poses a potential threat to the surrounding houses in the explosion area. In order to determine whether the drilling and blasting construction has a vibration impact on the tunnel entrance, in March 2017, entrusted by the MHTJ-7 standard area of the China Railway 20th Bureau, the company arranged multiple instruments on the same monitoring line, passing 3 times. Measurement, the collected data is used for attenuation calculation, and the maximum safety distance under the blasting design dose is determined to evaluate whether the blasting construction of the initial tunnel opening has a vibration hazard impact on the residential building.
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