Soil resources are useful for our life.However,it sometimes causes serious disasters.Our laboratory study about disaster prevention of ground because of keeping safety and suitable life.Research topics are evaluating physical and mechanical property of soil and the characteristics of interaction problem between soil and structure. Main research projects in our laboratory are shown below; 1)We developed light weight new Jack to use for lift-up procedure of ground anchor structure(SAAM system).SAAM system is possible to evaluate the healthiness of ground anchor. 2)We developed ground improved machine with gravel column(ECOGEO).ECOGEO is possible to apply improvement of bearing capacity and drainage in the ground. 3)We research on improvement and maintenance of old ponds. 4)We evaluate shear band propagation in the ground using FE analysis and model test.