Study and Test on immersion of Q₂ Loess in Large Area

According to observed data from in-situ test and immersion of large pit test, the calculated and observed values of self-weight collapsibility were compared for subsoil with interbedded strata of loess and fossil soil. The time-varying, depth-varying and influence zone of self-weight collapsibility were discussed. Assessment from experiment and analysis of subsoil collapsibility was made.