EVALUATION OF CONCRETE LINING, CLEAR CREEK POWER TUNNEL,
BUREAU OF RECLAMATION DENVER COLO
Pagination or Media Count:
Tests on the lining of Clear Creek Power Conduit, CVP, indicate good quality concrete used in both sections of the tunnel, normal strength development with increase in age, and good concrete control and placement for a type of construction probably beset by more placing problems than are normally encountered in concrete structures. Six-in.-dia concrete cores were extracted at 31 locations to establish the relationship between the properties of the in-place concrete and the 28-day control cylinders, evaluate tunnel lining placing efficiency, and establish penetration of backfill pressure grouting. Test results are given.