Device for measuring external friction angle between soil body and retaining wall back

The utility model relates to a device for measuring an external friction angle between a soil body and the wall back of a retaining wall. Wherein the upper surface of the concrete plate (2) is used for simulating the wall back of a retaining wall, the sample container (3) is used for containing a soil sample (4), the bottom of the sample container (3) is open, and the spring dynamometer (6) and the non-elastic rope (7) are used for connecting the sample container (3) with the electric motor (10) and are arranged in a horizontal state. The electric motor (10) is provided with a winding shaft (11) used for winding the non-elastic rope (7), and the winding shaft (11) can be driven by the electric motor (10) to rotate at a constant speed. According to the utility model, the accuracy of the external friction angle of the measurement result is greatly improved, and the data error is reduced, so that more reliable parameters are provided for engineering construction. The measuring device is simple in structure, conv