Some theoretical and practical problems of CPT use

Some results of theoretical researches which essentially influenced the development of a CPT method in Bashkortostan Republic (Russia) are generalized in the given paper. The suggested theoretical dependence connects the CPT results with the standard properties of the soil considered as elasto-plastic medium. This dependence explains a variety and some discrepancy of the existing empirical dependences. The principles of combined use of CPT with other methods of soil research are developed. They are based on the application of the mathematical statistics regularities and Bayes rule. It is shown that the CPT effectiveness is in the greatest measure exhibited when carrying out a great number of tests at a site with this method.