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 crossings of main traffic arteries, one of which running in tunnel under the other main traffic artery in complicated mining and geological conditions including cases of presence of loose water ground in tunnel base, construction of tunnel without interruption of traffic in overlying main traffic artery. Separate grade crossing of main traffic arteries with one of which running over the other main traffic artery passes in tunnel which contains lining consisting of trough, walls and roofing, and exterior protective screen from long members and zones of ground reinforced by injection located outside of tunnel. Novelty consists in that in cases of location in tunnel of railway main line and motor way above it, zones of ground solidified by injection are made in form of reinforced structure from system of reinforcing members in form of injection piles from solidifying material, and/or pear-shaped bodies, and/or intersecting layer. In this case, said zones are located, either, from outside of entire perimeter of tunnel, or under tunnel base, or under tunnel base and, at least, on a part of ground height adjacent to lower parts of tunnel walls. Protective screen is located over entire perimeter of tunnel and supported from internal side by frames. In this case, one part of caps of reinforcing members or additional member located in them crossing the screen are introduced into lining to form single spatial structure together with screen and lining. Technical result ensured by claimed invention consists in increased safety and reliability of crossing structure, both, at stage of its erection and stage of its operation due to then fact that it is made to ensure faultless operation of crossing, performance of work involved in construction of tunnel as a component of crossing without interruption of traffic in overlying main traffic artery and exclusion of deformation of day surface exceeding permissible values that is of prime importance in dense housing system and complicated mining and geological conditions including presence of loose watered grounds in tunnel base; increased economic efficiency of structure due to formation of jointly operating single spatial steel-reinforcedconcrete structure including protective screen, its support frames and lining material and also reinforced pipe base of tunnel and ground solidified by injection. EFFECT: higher efficiency. 16 cl, 17 dwg