00715naa#a2200169#i#450# EN\\bibl\119265 20260405164050.7 1815-588X 20260331b2026####ek#y0engy0150####ca RU Improvement of soil properties in tunnel construction, as demonstrated by the Severomuya Tunnel construction Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2026 7 с. Journal article local Укрепление (стабилизация) грунтов инъецированием растворов. 624.138.24 Filippov Sergey Leonidovich pgups.editorum.ru