Abstract:

Drilling and blasting method is often used in the construction of shallowburied Metro stations located in rock strata, and it is inevitable that vibration effect may occur to the surrounding buildings. In this paper, vibrationreducing holes are used in the blasting construction of a shallowburied station of Qingdao Metro, so as to minimize the impact on the surrounding buildings. A series of tests and monitoring have been carried out for the vibrationreducing holes, blasting vibration velocity and vibrationdamping effect. The results show that the influence on the surrounding buildings has been reduced by using vibrationreducing holes, the average vibration velocity attenuation ratio reaches 35.4%, and the safety of the surrounding buildings has been guaranteed.

Key words: tunnel, drilling and blasting method, blasting construction, vibrationreducing hole, blasting vibration monitoring