Early prediction of tunnel stability based on wave velocity method
This paper aims to use P-wave velocity(Vp)to analyze the stability of the surrounding rock in tunnels.Firstly,the relationships between Hoek-Brown constants such as geological intensity index(I),and disturbance parameter(D)and Vp were studied.Furthermore,the tunnel displacement was derived by Hoek-Brown criterion.Thirdly,Noticing that a series of parameters such as Young's modulus,Poisson's ratio,and Vp of surrounding rock can be read from TSP203PLUS.A method to determine the displa cement of the plastic zone in tunnels by using the obtaining parameters from TSP203PLUS was developed.In order to demonstrate the effectiveness of this method,an early evaluation was conducted on a certain tunnel,and the prediction results were validated using the Kastner equation.The results show that the displacement of the plastic zone obtained from the tunnel calculated using the method in this paper is basically consistent with that using the Kastner equation,which is basically consistent with the Kastner equation.The parameters obtained by this method are more convenient,and have good engineering application prospects.
tunnelstability analysisseismic wave methodlongitudinal wave velocityHoek Brown constant
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