噴砂現象に関する研究

Abstract

The model experiments of sand jet were made in connection with the spouting of groundvater and sandy soil observed at the districts damaged by Niigata Earthquake. From theresult of experiments, it was suggested that a nondirnensional measure of sand jet b/T (b:jet width at the surface of sand layer, T: thickness of sand layer) might be proportional to the"reduced seepage rate" per dnit head difference Ｑ/κH (Ｑ: seepsge flowrate, r:permeability, H: head difference between the surface and bottom of sand layer)