SEPARATE GRADE CROSSING OF MAIN TRAFFIC ARTERIES Russian patent published in 2002 - IPC

FIELD: construction engineering. SUBSTANCE: claimed invention may be used in designing of separate grade crossing of main traffic arteries one on which runs in tunnel under the other main traffic artery in complicated mining and geological conditions with presence of loose watered grounds in tunnel base, construction of tunnel without interruption of traffic in overlying main traffic artery. Separate grade crossing of main traffic arteries one of which runs above the other one, passed in tunnel containing lining which consists of trough, walls and roofing, exterior protective screen from long members and injection piles located outside of tunnel, under its base. Novelty consists in that in separate grade crossing of motor roads, protective screen is made over entire perimeter of tunnel and supported by frames from internal side discretely located over tunnel length. Lower parts of said frames and also, at least, one part of caps of injection piles, or additional members located in them, crossing screen and are introduced into tunnel trough body and concreted to form foundation mat of tunnel pile base together with section of screen and trough body. Technical result ensured by claimed invention consists in increase of safety and reliability of crossing structure, both, at stage of its construction and at stage of its operation due to provision of trouble- free operation of crossing, performance of working involved in construction of tunnel as crossing component without interruption of traffic in overlying main traffic artery and exclusion of deformation of day surface exceeding permissible values that is of vital importance in city dense housing system and complicated mining and geological conditions including presence of loose watered ground in tunnel base, higher economic efficiency of structure due to formation of jointly operating single spatial steel reinforced-concrete structure including protective screen, its supporting frames and lining material, and also reinforced pile base of tunnel and ground solidified by injection. EFFECT: higher efficiency. 16 cl, 17 dwg