ABSTRACT
One of the topical problem of underground construction is the protection of under-ground structures from water encroachment. The problem is based on the impossibility to apply traditional waterproofing materials for underground constructions (bituminous-polymer rolls, polymer sprayed compositions) on inaccessible exterior insulated surfaces of runway slabs and wall structures constructed in open pits without slots for backfilling. Before the erection of supporting structures, the waterproofing coating is laid on the accessible surfaces of the concrete preparation and “diaphragm wall”. This eliminates the adhesion of the waterproofing coating on the outer surface of the protected structures and results in the formation of a gap between the waterproofing and the protected structure. In the case of damage or defect of the waterproofing coating, the seeping ground waters migrate uncontrollably along the formed joint and penetrate into the building. The report presents the results of scientific and practical work performed in the JSC ’Mosinzhproekt’ to eliminate the mentioned problem, including the development of design and techno-logical solutions using the methods of voile injection and manufacture of a two-layer seamless waterproofing membrane in the building environment as well as making changes to the effective regulatory and technical documents of the Russian Federation.
