Abstract
To establish the protective design for underground structures, the characteristics of ground shock pressure should be estimated properly. In this study, the effects of soil properties on the ground shock pressure are examined by small-scale underground explosion tests with the different kinds of soil, and then a quantitative evaluation of ground shock pressure is presented. A charge was exploded in the subsurface soil specimen, and the pressure in soil due to explosion was measured. From test results, it is found that the effect of the degree of saturation on the properties of ground shock pressure is remarkable. Then, ground shock pressure and impulse are formulated as a function of degree of saturation. To validate the proposed formulae, the formulae are compared with the past data, and they agree well with the larger scale test data.
