ABSTRACT
Osaka Subway Line No. 8 was constructed at the east side of Osaka city as north-south rail route in underground. Every station was built by open cut method. In order to control the settlement at the ground surface and the influence on the neighboring ground environment, seepage control method was adopted in all of the station construction sites with extending earth retaining walls, where the most were Soil Mixing Walls, to the Pleistocene clayey layer under the artesian aquifer.
