DEVICE FOR SUBGRADE OF HIGH-SPEED IN AREAS WITH DEVELOPMENT OF KARST-SUFFUSION PROCESSES Russian patent published in 2019 - IPC E01B1/00 

FIELD: construction.

SUBSTANCE: invention relates to the construction, in particular to the construction and reconstruction of railways for high-speed rail transport, and can be used in the construction of railways in areas with the development of karst-suffosion processes. Device for the subgrade of the high-speed highway in areas with the development of karst-suffusion processes contains a pile-grillage foundation, including bored piles with a diameter of at least one meter installed in the subgrade base. Distance between the bored piles in the transverse profile in 4÷5 times the diameter of the pile, and the distance between the bored piles in the longitudinal direction is not less than 1.5 times the distance between them in the transverse profile. Bored piles are interconnected by bolts fixed in the pile caps. Monolithic reinforced concrete slabs with longitudinal and transverse expansion joints filled with bitumen mastic and polystyrene foam are installed on girders, while the slab freely rests on the outer girders and is rigidly attached to the central girders.

EFFECT: technical result consists in increasing the reliability and durability of the high-speed highway in areas with the development of karst-suffusion processes.

1 cl, 3 dwg