Studies of Anisotropic Behaviors of Laterite under Differnent Compacted Energy

• Main Authors: Chieh-Sheng Tseng, 曾界升
• Other Authors: Shuh-Gi Chern
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/16792004266893639722

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 96 === Most materials in geotechnical engineering are nonhomogeneous and anisotropic. Therefore the true mechanical behavior of soil is not isotropic. In order to imitate the real 3-D mechanical behavior of soil in the laboratory, the true triaxial test devices were developed and three different principal stresses σx≠σy≠σz were also been applied. The objective of this study is to investigate the 3-D stress-strain behaviors of laterite under differnent compacted energy. A series of radial stress path tests are performed with flexible boundary true triaxial testing apparatus. The results indicate that：（1）The stress of failure has obvious increase with the raise of compacted energy and also the anisotropic of specimen;（2）They all show plane strain effect when b=0.5 ;（3）Lade and I3 failure criterion can satisfactorily represent the compacting 25 and 35 times experimental values, however, because of the anisotropic under compacting 50 times is the most obviously, Abelev & Ladefailure criterion is freferred.