ESTIMATION METHOD OF ROCK MASSES IN TUNNEL CONSTRUCTION BY CONVERSION ANALYSIS USING SEISMIC VELOCITY AND ELECTRIC RESISTIVITY

Abstract

Geophysical exploration for tunnel construction is usually used on seismic method and electric method. However, seismic velocity and electric resistivity directly are not connected with a design for tunnel construction. Grasping the nature of rock masses, for example effective porosity and saturation, is very important for the design of tunnel. In this paper, new estimation method of tunnel construction by conversion analysis seismic velocity and electric resistivity are proposed. As the result, it is recognized that the distributions of porosity and saturation of rock mass around tunnel by this analysis system correspond with that of the real rock mass conditions.