ABSTRACT
The article addresses the finite element method for numerical prediction of results from using the method of controlled compensation grouting to prevent development of excess deformations in bases of buildings and structures. It is noted that the existing compensation grouting method has a significant disadvantage: it is impossible to predict results since it is accompanied by chaotic fracturing in the area filled with the grout (soil “hydraulic fracturing”). Laboratory results related to grout viscosity influence on the risk of hydraulic fracturing are analyzed. The article also presents an analysis of numerical modeling findings, demonstrating that it is possible to predict results of compensation grouting using high-viscosity grouts as in this case the process of numerical modeling is consistent with the actual process in terms of distribution of the compensation grouting volume (changes in the form and volume of finite elements modeling the grouting area) which depends on elastic characteristics and stress condition of adjacent finite elements modeling the soil mass. Data on large-scale studies at a test area are compared to results of numerical modeling. Conclusions on the possibility to calculate the grout volume and, therefore, predict values of compensated settlements and lifting of buildings and structures are drawn.
