Group of Viljui Hydro Poer Plants (I, II, III)

Hydraulic engineering works

Underground structures of various application, Chief Project Engineer - V. Parkhomenko.

Projection of the tunnel structures, underground HPP structures construction  organization and technology:
 - Excavation and concreting of hydrotechnical tunnels in permafrost soils.
 - The thermal regime of tunnel air during ventilation of underground workings.
 - Using the method of "cold concrete"  while lining with antifreeze additives and accelerating supplements.
 - Ensuring the stability of thawing rock massive around underground workings.
 - Technical maintenance of underground construction.