Dynamic properties and test methods ground liquefaction in situ using a borehole that can be obtained in a simple way the deformation characteristics and strength dynamically for dynamic cyclic loading of the soil layer in any position in the ground and I will provide the test equipment. Using a measuring cell having a basic 3 rooms configuration, and loading a dynamic cyclic loading alternately in J1, J3 soil layers above and below via the intermediate soil layer J2, whether or not there is what kind of impact in the middle soil layer J2 I analyze the relationship of displacement and pressure. The loading the load repeatedly until the destruction of the middle soil layer, test procedure measures the breaking strength. In addition, I also analyzed for the presence or absence of liquefaction. If the breakdown phenomenon does not appear to measure the displacement characteristics and (Strength and Deformation Characteristics) basic characteristics of the ground after being subjected to dynamic loads by applying a static load to the dynamic test after completion. Measuring the cell for a 5 room configuration, to loading the static load similarly for J4, J5 soil layer adjacent above and below the J1, J3 soil layers above and below, an intermediate soil layer J2 is preferred. With the loading static load to J4, J5 soil layer of the top and bottom, and it is possible to prevent the collapse of J1, J2 soil layers above and below, to act in a stable dynamic cyclic loading for soil layers above and below I could. Furthermore, also J4, J5 soil layer, it is possible to analyze the characteristics of the ground by measuring the relationship between pressure and displacement when multiplied by dynamic repeated load, and to contrast with the intermediate soil layer.
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