Description of Engineering-Geological Conditions of "Khobi 2 HPP" Construction Diversion Tunnel (from pk 4+200 to pk 4+500) and Assessment of Surrounding Massif

Hydrotechnical facilities represent hard complex of structures, the design and construction of which requires a large volume of detailed engineering-geological substantiation. Using of water resources shall be carried out in complex and hydrographic network of our country is no exception in this regard. The actuality of the issue is obvious; therefore, various geological processes require special study, which is necessary condition for the rational design and construction of hydrotechnical facilities. In hydrotechnical construction practice there are many cases when, due to improper assessment of geological conditions, structure deformations, failures and sometimes cataclysms took place. The investigation territory is located in Chkhorotsku region, close to the village Mukhuri. The territory represents the hilly exposition covered with deciduous forest and is free from constructions. At the mentioned territory construction of “Khobi 2 HPP” hydrotechnical complex is considered by the project, which consists of the following: headworks, powerhouse, 6.6 km long tunnel and 0.8 km long penstock. The capacity of HPP is 45 MW.