Study on rational ground parameter evaluation methods for the design and construction of large earth-retaining walls

Urbanization is in advanced stages along the road and approximately 9.5 km is also National Route 298 located on the surface for public use and the rest, exclusive to the Tokyo Outer Ring Expressway, is underground. It makes use of semi-underground ditch structures where most of it will be constructed with an open-cut system that uses earth-retaining walls (see Fig. 2).