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Rock Mass Elastic Resistance Coefficient Measurement Based on the Seismic Wave Method
(1 College of Environment and Resources, Fuzhou University, Fuzhou 350116; 2 Engineering Research Center of Geological Engineering, Fujian Provincial University, Fuzhou 350116 )
Abstract The elastic resistance coefficient of surrounding rock is an important parameter of tunnel structure de?
sign, and is characteristically difficult and expensive in terms of in-situ testing. A method is proposed for calculating the elastic resistance coefficient based on the measured seismic wave velocity of the surrounding rock in advance geological forecasts based on the seismic reflection method. Specifically, the dynamic elastic parameters of the surrounding rock are calculated using the measured seismic wave velocity, then the static parameters of the surrounding rock are calculated based on the relationship between the dynamic and static elastic parameters of the rock mass, and the elastic resistance coefficient of the rock mass is derived. Taking the Tingzhou tunnel of the Ganlong line as an example, it is determined that the coefficients of the tunnel surrounding rock of grade Ⅲ and Ⅳ are 0.54~1.19 GPa/m and 0.24~7.6 GPa/m respectively. The above calculated values are consistent with the data for elastic resistance coefficients of surrounding rock of grade Ⅲ and Ⅳ specified in the "Code for Design of Railway Tunnels."
Abstract：
The elastic resistance coefficient of surrounding rock is an important parameter of tunnel structure de?
sign, and is characteristically difficult and expensive in terms of in-situ testing. A method is proposed for calculating the elastic resistance coefficient based on the measured seismic wave velocity of the surrounding rock in advance geological forecasts based on the seismic reflection method. Specifically, the dynamic elastic parameters of the surrounding rock are calculated using the measured seismic wave velocity, then the static parameters of the surrounding rock are calculated based on the relationship between the dynamic and static elastic parameters of the rock mass, and the elastic resistance coefficient of the rock mass is derived. Taking the Tingzhou tunnel of the Ganlong line as an example, it is determined that the coefficients of the tunnel surrounding rock of grade Ⅲ and Ⅳ are 0.54~1.19 GPa/m and 0.24~7.6 GPa/m respectively. The above calculated values are consistent with the data for elastic resistance coefficients of surrounding rock of grade Ⅲ and Ⅳ specified in the "Code for Design of Railway Tunnels."
YU Shi-Wei- 1 Liu-Cheng-Yu- 1,
2
.Rock Mass Elastic Resistance Coefficient Measurement Based on the Seismic Wave Method[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(1): 68-73
2017, Vol. 54 