The composite structure composed of steel soldier beam, that is usually temporary member, in earth retaining wall and exterior basement R/C wall has been developed. In this study, two types of flexure-shear test of composite basement wall were conducted. The purpose of first test is to clarify influence of external load acting directly to R/C wall, that of second test is to verify the proposed design method. This paper presented the outline of that test, the difference of flexural capacity of composite underground wall depending on loading condition, and the effectiveness of the proposed design method.
