Study on the Deformation Factors of Unsaturated Soils

• Main Authors: Jien-Yuan Lien, 連健淵
• Other Authors: Hsin-Yu Shan
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/03500672783133172789

碩士 === 國立交通大學 === 土木工程系 === 88 === The engineering problems related to unsaturated soils are land subsidence resulting from change of effective stress and slope stability. For sandy soil,change of volumn resulted from change of effective stress is not significant. The objective of this research is to study the pore pressure factor of unsaturated clayey soils. The pore pressure factor varies with the degree of saturation. Deformation tests and soil-water characteristic tests of unsaturated soils were performed by using specially designed consolidometer simulate the behavior of field suction. The experimental results indicate that pore pressure factor of clayey soil will decrease nonlinearly with degree of saturation . The results also show that pore pressure factor is closely related to soil-water characteristic curve . Equation for pore pressure factor and matric suction is developed.