METHOD AND SYSTEM FOR SHALLOW TUNNEL CONSTRUCTION ON BOTTOM OF WATER AREA

FIELD: hydraulic engineering, particularly for forming temporary structures for enclosing closed in plane water area bottom part and space above the bottom part through the full water thickness. ^ SUBSTANCE: method of shallow tunnel construction involves forming structure enclosing closed in plane bottom part; removing water from the structure; performing works in dry structure and demounting above structure. Method of enclosing structure forming involves producing bottomless hydraulic enclosure with controlled floatability; transporting and moving thereof to tunnel path; immersing the enclosure in water up to reaching water area bottom by reducing floatability thereof and fixing enclosure with fastening means and anchor system; leveling upper enclosure part with horizon line and arranging cranage and platforms for building material storage on upper enclosure part; erecting cutoff walls inside space defined by enclosure; removing water from the enclosure; developing bottom ground by trench digging; constructing pile tunnel base; building foundation grill on pile tunnel base; locating composite or precast reinforced concrete tunnel sections on foundation grill; recovering initial floatability of the enclosure. Enclosure structure has movable fastening means formed as blades along vertical walls thereof. ^ EFFECT: increased tunnel reliability, reduced time of erection thereof. ^ 4 cl, 4 dwg