In this construction, steel-concrete sandwich structural immersed tunnel constructed by using the semi-selfcompacting concrete for the winter season. In this application, the quality under the degree environment of low temperature of the semi-selfcompacting concrete mixed by the system mixer was checked. Moreover the filling experiment was conducted using the full-scale model which imitated the very narrow division, and the filling performance was checked. In actual construction, the new technologies for semi-selfcompacting and site management were developed and introduced.
These mesures have proved semi-selfcompacting that filling nature equivalent to hi-performance concrete could secure. Therefore, it turned out to steel-concrete sandwich structural immersed tunnel that semi-selfcompacting concrete can apply enough.
