Numerical Analyses of A Geosynthetic-Reinforced Soil Wall with Flexible Wrapped-Around Facing

• Main Authors: Ting-Yu Lin, 林庭妤
• Other Authors: Kuo-Hsin Yang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/39006555081579242194

碩士 === 國立臺灣科技大學 === 營建工程系 === 104 === The research describes a finite element model that was developed to simulate the response of a full-scale, geosynthetic-reinforced soil (GRS) wall with wrapped around faces. The selected GRS wall was 3.6m tall with uniform sand backfill built and carefully instrumented at Royal Military College. Numerical components and modeling procedures, especially the modeling approach for flexible wrapped faces, were described in the research. The baseline case was shown to yield predicted reinforcement tensile strains that are judged to be in good agreement with the measured data. After the numerical model was verified, a series of parametric analyses were carried out to examine the influence of soil constitutive model, soil modulus within 1 m from faces, interface, reinforcement wrapped length, stepped construction and compaction on the computed reinforcement loads and maximum facing displacement. A relative error technique was applied to quantitatively evaluate the influence of each parameter. The parametric study intended to identify key numerical components and modeling procedures which have influence on the computed reinforcement loads and facing displacement. The numerical results indicated that the interface and soil modulus within 1 m from faces have little influence on the predicted reinforcement loads for GRS structures under working stress conditions. The results of this study provide insightful information and facilitate the practical application of finite element analysis to GRS structure design.