SLOPE FACE STABILIZATION FOR CRITICAL SLOPE SURFACES

摘要

Advancements in erosion and sediment control technology have produced new and improved products, which have fostered innovative techniques for critical slope face stabilization. This paper reviews various slope stabilization techniques to address critical slope surfaces related to roadway construction. Emphasis is given to showing details and describing the different products utilized in various slope treatments while evaluating their effectiveness and cost. In the fall and winter of 1997-98, the El Nino rains in Northern California yielded at least 150% of the natural rainfall of a normal winter season. These conditions provided a rigorous test of the effectiveness of implemented slope stabilization construction techniques. In particular, this report examines Geosynthetic Stabilized Embankments (GSE) and their resulting slope surfaces. GSE embankments are commonly used for over steepened slopes when a site presents limited right of way and construction constraints. GSE embankments have steep slope face surfaces that present challenges in the design of functional and effective slope stabilization measures. Also, an effective technique for stabilizing critical excavation slopes will be reviewed and illustrated. Given these challenges, standard conventional methods of erosion control are often insufficient. By using well-established Biotechnical Slope Protection principles in conjunction with improved erosion control products, erosion control and slope surface stability can be significantly enhanced.