A METHOD TO ESTIMATE CONTINUOUS DISTRIBUTION OF STRENGTH IN IMPROVED LAYER OF GROUND BY S-WAVE REFLECTION METHOD

Abstract

Before construction of any structures on surface or subsurface of alluvial clay layer, the cement mixing methods have been used frequently to construct an improved layer at certain depth of ground. However, the confirmation of improved layer is performed by only boring and laboratory testing. The present paper are discussed about the confirmation method using s-wave reflection method, and it is tried that the S-wave distribution of improved layer is obtained by velocity analysis. Furthermore, the relation between the uniaxial compression strength of improved layer specimens by boring and S-wave velocity of improved layer by the velocity analysis are discussed, and the continuous distribution of uniaxial compression strength on improved layer can be accurately obtained.