Layered oscillatory shear soil box testing apparatus

The utility model discloses a layered oscillatory shear soil box testing apparatus, comprising a shear soil box, an oscillation device, and a drive device. The shear soil box comprises frame layers, and the frame layers are mutually connected in the vertical direction by lockable and releasable slide blocks and linear guide rails and also mutually connected in the transverse direction by rebound plate springs and hemisphere cylinders. The frame layers are arranged on a bottom plate of the oscillation device. A wrinkled rubber film is arranged inside the shear soil box, and wrinkles are plugged in the parts between the frame layers and the gap between the lowermost frame layer and the bottom plate. A bottom beam supports the bottom plate of the oscillation device by plate springs and springs. The bottom plate is also equipped with bottom plate holes used for mounting permeable stones. The bottom beam is fixed on the ground of a laboratory. The drive device comprises an electric servo actuator arranged on the end surface of an I-shaped steel beam and a force sensor connected with the actuator, and the actuator is mounted on a reaction wall through a connection plate. The apparatus can simulate a transmission process of shear waves in a soil layer with limited thickness during an earthquake. The layered oscillatory shear soil box overcomes the limits of bottom shearing force of common shake tables. Moreover, the apparatus is characterized by simple configuration, low cost, and convenient installation and application.