Abstract: The conventional design methods for estimating the sliding forces in the multistaged landslides are usually over conservative due to their complexity. As a result of the excessively large driving forces, the mitigation scheme usually becomes very difficult. This paper presents a case history of the Longjiayan landslide mitigation. The landslide characterization was performed and the multistaged mitigation program was selected based on the stability analysis results. The drilled piers were utilized to resist the potential sliding and the performance of the "h" typed drilled piers was analyzed by using the commercial finite element software ANSYS.

Key words: Multi-Staged Landslides, Landslide Mechanism, Multi-Staged Mitigation, H-Shaped Drilled Piers, Software ANSYS