FIELD: construction industry, restoration of underground structures located in water-saturated unstable ground. SUBSTANCE: process of restoration of underground structure includes installation of chamber in doorway to structure, its sealing from fencing structures by freezing and lifting of structure to specified mark thanks to creation of excessive pressure under structure by feeding coarse sand and water under lining. Novelty of invention consists in unloading of upper part of lining of structure before feeding coarse sand and water by formation of ice and ground mass around structure with thickness ensuring its strength in process of lifting structure. Then space for its movement is cleared. For it upper part of lining of structure is heated and floating ground is partially thawed and removed inside structure to form free space above it. EFFECT: removal of load on upper part of lining in process of restoration of underground structure which suffered pronounced subsidence with loss of sealing of fencing structures. 1 dwg
