Application of the Finite Element Method on Creep Behavior and Progressive Failure of Slate Slopes

• Main Authors: An-Shih Pan, 潘安士
• Other Authors: Kuang-Tsung Chang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/66387323931739872508

碩士 === 中興大學 === 水土保持學系所 === 99 === With the influence of weathering and gravitation, rock slope gradually become weaker and may cause sliding slope creep, folding rock and progressive failure. In previous studies, people had demonstrated the phenomenon of rock structure creeping through field investigation. However, there has no demonstration on this phenomenon through this mechanism. This project is divided into two parts: slate slope creep and progressive failure. According to the results of previous study, by taking the slate slope of Lushan area as the material, the project use the numerical software of finite element “Plaxis” to simulate the creep behavior for the long-term effect of weakening factors. Moreover, the project also studies creep behavior of slope from the effects of scale and geomorphology; on the other hand, the project discusses process and mechanism of failure of slope of different geologic structures. According to the failure criterion by Hoek-Brown and literatures, we use models with different materials to estimate the parameter of slate strength and creep, and then we add different weakening factors to simulate possible situations of creep behavior and progressive failure of the effects of scale and geomorphology and geologic structure. Comparing with the previous studies, result of this research shows that the simulation of slope creep through the mechanics is corresponding with the geologic structure phenomenon of slope creep in the previous study. In addition, by simulating the progressive failure of slope, we can illustrate the process and result of failure continues development.