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Overhaul of railroad tunnel N 3 along Sofia - Burgas main road line

Following repairs and hydro insulation works were executed along entire length of tunnel - 3000 m at the section between Bunovo Village and Dolno Kamartzi Village:

2009 - 2009

Following repairs and hydro insulation works were executed along entire length of tunnel - 3000 m at the section between Bunovo Village and Dolno Kamartzi Village:
Partial breakup of tunnel surface; washing out of tunnel's surface with hydro-blaster; fabrication of leveling layer of gunite concrete of 2 cm thickness( MASTERSEAL 345); protective layer - sprayed on concrete Class B52 with fibers - d=5 cm over hydro insulation; arresting of water drips and leaks.