Abstract
A method that is to build a structure under the track by installing steel elements with partcular joints into the soil at the right-angled direction to the track has been developed. The structure build by this method is a compound structure of steel elements with concrete fillings lined through joints. This research is to consider the destractive action and influential factors for shear strength on the structure by experiment. The examination to stress shear is carried out in the experiment, with the perimeter of the ratio between the width of steel element (S: the interval of reinforcement steel plates) and height (Z), and the strength in concrete, by using a test piece of 40.48 cm in height. As a result of this research, we could categorize the destructive action of concrete beam which is filled in steel elements and also could propose a formula to evaluate shear strength for the destruction of concrete brace for compression.
