ABSTRACT
This chapter presents the results of a study conducted to assess the stability of the slope above a provincial road at Cadas Pangeran section which had undergone slope modification and reinforcement after the failure in April 2005. The hilly area in Cadas Pangeran road section, Sumedang regency, West Java is one of the areas highly prone to landslide. West Java province is the area with the highest landslide vulnerability in Indonesia. The development of new tension cracks in Cadas Pangeran slope is detrimental to the stability of the slope especially during rainfall infiltration. Assessment of slope stability indicated that the existing stabilization methods employed in Cadas Pangeran landslide location is ineffective. Mechanical drilling was aimed to reveal the soil stratification. Slope stability assessment of the existing condition revealed that the lower portion of the slope is in critical condition, and failure is likely to occur under elevated water table condition.
