EXPERIMENTAL AND DEM-BASED ANALYSIS OF LATERAL STRESS AND SOIL PARTICLE DISPLACEMENT UNDER THE ACTION OF A SUBSOILER

The lateral stress on the soil in the lateral position during the operation of a subsoiler directly affects the soil displacement and quality of operation. In this study, soil pressure sensors are used to measure the soil lateral stress at the lateral position of the subsoiler in the soil trough, and a discrete element simulation is used to explore the relationship between the change pattern of the soil lateral stress and soil displacement. The test results show that the soil at the lateral position of the subsoiler is subjected to lateral stress, which leads to the generation of lateral displacements. The lateral stress lasts no longer than 3.5 s, the lateral displacement lasts no longer than 3 s, and both exhibit a fluctuating pattern of peaks and troughs over time. The positive peaks are significantly larger than the troughs, indicating that the positive peaks are the main factor generating soil disturbance. The lateral stress and lateral displacement changes are consistent on the timeline, with the lateral displacement moving in the positive (negative) direction when the lateral stress direction is positive (negative). Both values tend to decrease linearly with increasing transmission distance.