METHOD OF UNDERGROUND STRUCTURE ERECTION IN URBAN BUILT-UP AREA Russian patent published in 2005 - IPC

FIELD: building, particularly underground structures.

SUBSTANCE: method involves arranging geotechnical barrier in ground between foundation of existent building and underground structure to be built along with embedding thereof for design depth; building walls and bottom of underground structure. Geotechnical barrier is formed by introducing injectors in ground on the path of deflected mode change wave propagation in ground and by injecting cement mix up to obtaining Kr ≥ 0.5, where Kr is relaxation coefficient equal to ratio of terminal ground pressure after relaxation to maximal injection cement mix pressure. Walls and bottom are built under the deflected mode control. When deflected mode value changes cement mix is fed to recover deflected mode value in ground.

EFFECT: prevention of ground deflected mode change under building foundation during underground structure erection.

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