Stage Division of Landslide Deformation and Prediction of Critical Sliding Based on Inverse Logistic Function

The cumulative displacement-time curve is the most common and direct method used to predict deformation trends of landslides divide stages. A new based on inverse logistic function considering distance weighting (IDW) proposed displacement landslides, quantitative standards dividing stages determining critical sliding time are put forward. applied in some landslide cases according monitoring data shows that effective. Moreover, long-term predictions two landslides. Finally, summarized with application other cases, value acceleration, 0.9 mm/day2, suggested as first early warning standard sliding, fitting acceleration rate volume or length can be considered secondary threshold failure.