An effective seismic retrofit for a sidewall of a cut and cover tunnel has not been established yet. We develop a new method of seismic retrofit for the cut and cover tunnel. We call this “polymer isolation method.” In this method, we insert a thin wall made ...

This paper presents a new concept of the seismic countermeasure for a structurally special part of tunnel such as ramp of road tunnel and a crossover of double-truck railway tunnel, in which a flat and large cross-sectional tunnel and a junction of tunnels ...

<p>A new seismic isolation technology ln which a slip easily occurs between a stracture and its peripheral soil or back-filling material has been developed. Such slip takes place by coating the outer surface of structure with a particular silicone paint of ...