A Study of Variational Method in Reinforced Slope Stability Analysis

• Main Authors: Chang, Ming-Te, 常明德
• Other Authors: Wu Cho-Sen
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/62660068138484056920

碩士 === 淡江大學 === 土木工程學系 === 85 === This paper presents an analytical method to evaluate the stability of geosynthetic-reinforced embankments. Variational approach developed by Castillo and Revilla is adopted and extended.The reinforcing inclusion that resists extension only is modeled as an anisotropic layer of strengthened soil. Since transfer mechanism of shear stress between inclusion and the adjacent soil matrix are adhesive and frictional forces, the constraint provided by the inclusion propagates from the interface of these two materials toward a limit distance of soil. The reinforcing inclusion is then considered as a strengthened layer with certain thickness.Several conclusions can be drawn after the preliminary investigation of the reinforced embankment:The most possible failure surface is altered by the existence of strengthened anisotropic layer of soil.From the study of a single reinforcement placed on various position, a poor reinforcing zone is found in the upper area of the embankment. Reinforcement embedded in this zone contributes little in stabilizing the embankment. This area expands from top of embankment farther into the soil mass for low cohesion soil and for gentle slope.Increase of reinforcement number or strength expands the failure surface deeper into the soil, failure surface also passes farther away of the toe.For the reinforced embankment with the failure surface passes through the toe, inclusion placed at the same level as the toe contributes little stabilizing effect.