TUNNEL Russian patent published in 2002 - IPC

FIELD: construction engineering, particularly, designs of underground structures made under main traffic arteries without traffic interruption, under complicated mining and geological conditions, including presence of loose and watered grounds occurring under tunnel trough and deforming its base. SUBSTANCE: tunnel includes lining, which consists of trough, walls and roofing, exterior protective screen from long members with closed or opened (not specified in drawings) configuration of cross-section and lock joints between members. Novelty consists in that tunnel protective screen is made by working preliminarily consolidated loose ground and located over entire perimeter of tunnel cross-section. Lining through has pile base with injection piles whose upper parts has branch pipes made of structural material compatible in operation with pile material. Branch pipes are passed through holes made for the purpose in locking joints of screen members. Technical result ensured by claimed invention consists in increased reliability and safety of tunnel operation due to exclusion off settling of day surface, both, during construction and operation of tunnel, with simultaneous reduction of settling of base ground of tunnel constructed in complicated mining and geological conditions, including presence of loose watered grounds at level of tunnel base, including very compressed peats with underlying flowing loam and gravel layer found under loam and native grounds on considerable depth. EFFECT: higher efficiency. 19 cl, 23 dwg