ABSTRACT
On the Expressway of Japan, many structures are aging and renewal construction for a longer life is being promoted. The Main contents of the tunnel are to repair and reinforcement of the lining and countermeasure for heaving. The project scale is planned to be 130 km in 15 years from 2015 to 2030. In most cases construction will be carried out while opening one lane of two. As a result, the countermeasures works in a narrow space and the speed of progress is slow. Many problems remain with respect to the countermeasure construction of heaving. Therefore, innovations such as further efficient construction in a narrow space, rapid construction technique, new technology countermeasure of heaving not dependent on additional invert-concrete, construction machinery and materials, etc. are required.
