FINITE-ELEMENT ANALYSIS OF STRENGTHENING THE SUBGRADE ON THE BASIS OF BORING AND MIXING TECHNOLOGY

One of the effective techniques to strengthen subgrade is boring and mixing technology, which based on immersion vertical elements – piles into subgrade. This method strengthening significantly affects stress state track superstructure. Two options placement are examined in this paper. To determine influence position superstructure, appropriate finite-element models were created. The fully reflect geometric deformation characteristics a real subgrade, strengthened by piles. calculated superstructure shown analyzed main contribution paper lies optimization parameters technology reduce "track superstructure–subgrade–soil basement" system. results show that location near rails more than ballast section.