Effect of Blasting During Tunnel Excavation on an Existing Adjacent Tunnel

Authors : Van Kıen DANG, Th VO

Pages : 12725-12740

Doi:10.18400/tekderg.1002681

View : 7 | Download : 3

Publication Date : 2022-09-01

Article Type : Research Paper

Abstract :In recent decades, the effects of blast loads on existing structures have gained considerable attention due to the increase in threat from various activities. Site-specific empirical relationships for calculation of blast-induced vibration parameters like Peak Particle Velocity insert ignore into journalissuearticles values(PPV);, Peak Particle Acceleration insert ignore into journalissuearticles values(PPA);, and Peak Particle Displacement insert ignore into journalissuearticles values(PPD); are commonly used for the estimation of the impact of blasting vibration on an existing adjacent tunnel. However, these relationships are not able to consider the variation in rock parameters and uncertainty of in situ conditions such as modern rock mass classifications insert ignore into journalissuearticles values(i.e., RMR, Q-system, RQD);... In this paper, a published blast data of various researchers in different rock sites at Croix-Rousse tunnel in France have been collected and used to propose a generalized regression model for PPV by considering the effects of rock parameters like Rock Mass Rating insert ignore into journalissuearticles values(RMR); system, damping ratio “”, Dynamic Young’s modulus “Ed”. By using the numerical analysis method, the proposed regression model of PPV insert ignore into journalissuearticles values(Empirical Formula); function of a variable and multivariate can be directly used in the prediction of blast-induced vibrations in rocks.
Keywords : PPV, Blasting vibration, multivariate equations, RMR, Twin tunnels