Method and device for testing steady repose angle of wide grading loose accumulation soil body

The invention belongs to the technical field of repose angle measurement and provides a method and a device for testing a steady repose angle of a wide grading loose accumulation soil body. Firstly, samples are made through a compaction barrel so as to form a conical cylinder; and then the compaction barrel is slowly lifted so as to remove the compaction barrel; soil particles on the surfaces of pillars fall freely under the action of gravity; finally, an included angle steadily formed between a slope and a level is the repose angle; a plurality of included angles can be obtained through a plurality of tests; and the arithmetic mean value of the included angles is used as the repose angle of the accumulation body. Such repose angle does not correspond to the loosest state and comprises any state from the loosest state to the densest state under a certain degree of density. The method and device are suitable for the soil body with grading wide and great particle diameter and incapable of being measured by the traditional method; and the method and device have the characteristics of strong practicability and stronger popularization and application values.