Abstract
Vibration monitoring of blasting excavation of drainage tunnel in Lufeng Nuclear Power Plant is carried out and the data of blasting vibration is analyzed in this paper. The results show that: (1) The vertical vibration velocity of the rock mass is greater than the horizontal radial and horizontal tangential vibration velocity (2) The blasting vibration velocity of rock mass decreases with distance, which is affected by rock structure and explosive quantity. The monitoring research in this paper has guiding significance for vibration prediction and control in tunnel blasting excavation.
Highlights
Slope instability refers to the occurrence of cracks, loosening and sliding in the slope after blasting or earthquake, which seriously affects the stability of the slope [1, 2]
In this work, blasting excavation vibration of drainage tunnel in Lufeng Nuclear Power Plant construction project is monitored in real time
The results obtained show that the vertical vibration velocity of the rock mass is greater than the horizontal radial and horizontal tangential vibration velocity, in which the times when the vibration velocity reaches its maximum in all directions are not the same
Summary
Slope instability refers to the occurrence of cracks, loosening and sliding in the slope after blasting or earthquake, which seriously affects the stability of the slope [1, 2]. In the dynamic problems of rock engineering, the common dynamic loads are engineering blasting, earthquake, locomotive and mechanical vibration [3, 4]. In practical engineering, blasting vibration is more common than ground motion, and rock damage caused by blasting is more complex [5]. In this paper, blasting vibration monitoring is carried out in the construction site. The influence of blasting vibration on rock slope and the law of vibration attenuation in practical engineering are studied [6,7,8]
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