Highway St. Petersburg – Moscow
Bottom Feed Stone Columns
Provide accelerated drainage, instant stability increase and reduction of long term creep settlements under road embankment. Challenge to use sand and not crushed gravel was mastered through modifications to Bottom Feed Stone Column equipment. Target to install Sand Columns in 2.50 m square grid with column diameter of 80 cm in the loose sand but up to 1.60 m in remaining lenses of the replaced peat.