1999 Volume 9 Pages 173-176
In the construction of tunnels with a large and flat cross section on the New Tomei-Meishin Expressways, high-strength concrete is considered to be an expected material for the secondary lining in order to achieve cost reduction by reducing both thickness of the lining and excavation area. For the purpose of finding important points in casting the high-strength concrete and it's strength characteristics with various conditions of casting and mix proportion, we performed testing by using model forms which simulate the real tunnel lining form and did the test construction in the field.
