Slope stability analysis using the deformation analysis method

• Main Authors: Hui-Ti Tseng, 曾惠蒂
• Other Authors: Chao-Shi Chen
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/39502935238320756201

碩士 === 國立成功大學 === 資源工程學系碩博士班 === 93 === 　Because of its inferior geological conditions and environmental factors, geological hazards like landslides are of great concern in Taiwan. The stability of soil slopes which mainly involves factor of safety is analyzed by the limit equilibrium method (LEM) and the deformation analysis method. The objective of this thesis is to investigate the stability of soil slope problem by using a numerical analysis procedure combining with the deformation analysis method, in which the stress-strain character of soil mass can be considered. The focus of this thesis is on the stability of soil slopes, in terms of factor of safety (FS) and failure surface location. Determination of the FS in numerical analysis method is mainly based on the concept of reduction in shear strength, and the corresponding failure surface is fairly found from the shear strain rate contour. It should be noticed that the critical slip surface is not an unique line. A narrow yielding zone was developed when the slope started to fail and any slip surface passing through the yield zone could be the failure surface. The main advantage of the proposed method for slope stability analysis over the traditional limit equilibrium method is that no assumption needs to be made in advance about the slice side forces, the location or shape of the slip surface. The factor of safety obtained by the proposed procedure is in a good agreement with that determined by the Bishop’s and Janbu’s methods. However, the proposed procedure can provide the designers a more solidly based concept in slope stability analysis.