Developing the algorithm of delineation of low-velocity ground layer in a higher-velocity layer as part of the refraction survey for seismic safety inspection of techno sphere objects

The refraction survey is based on registration of refraction elastic waves away from the source. Refraction waves travel time during processing gives information about the layers cover thickness and their form. You can get the mentioned data on condition that the elastic waves velocity from layer to layer in the ground gets higher in the depth. However, there are cases when there occur low-velocity layers among high-velocity ones in the ground in question. Therefore there is necessity for solving this problem within the investigated method. In the worked-out algorithm no new software packages have been invented, but the opportunities of already known software packages have been used (RadExPro, in our case), along with using miscellaneous calculations and graphic editors.