Abstract
Deformation resistance of the formation of the subgrade is the main indicator of the quality of the designed structural layers of the subgrade formation. Deformation resistance is determined in Slovak Railways (ŽSR) by a static plate load test and is expressed by the modulus of deformation Es . The static load test not only verifies the correctness of the design of the type of structural layers of the body of the railway subgrade, but it is also an indicator of the quality of the performed construction works. On modernized ŽSR lines, is designed for subgrade type No. 3 and in the most unfavorable geotechnical conditions also the type of structural layers of the formation of the railway subgrade No. 6. The required value of deformation resistance at the level of the formation of the subgrade is designed with regard to the speed zone of the railway line. ŽSR corridor lines are designed for speeds up to 160 km/h, so they belong to the RP4 speed zone. Such lines also include a section of the ŽSR modernized Plevník-Drienové-Bytča-Žilina line.
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