ABSTRACT
The paper presents results of the study dealing with the influence of various techniques for modeling volume loss on soil deformation. From the surrounding soil deformation viewpoint, the contraction method the effect of weight loss CMW produces the most correct results. It was shown that the application of Hardening soil models (HS, HSS) realized in PLAXIS software does not always give adequate results. These models do not consider the position of yield surface changing, which affects the deformation behavior of soil in the process of unloading/reloading or non-linear stress paths (as in the case of tunneling). In this regard, the ground surface settlement is overestimated by 1.5…2 times for normally consolidated soil (OCR=1), and underestimated for over consolidated soil (OCR>1). Recommendations for prediction of settlement associated with tunneling were stated.
