工程地质学报Issue(6)：849-856,8.
土-水特征曲线预测非饱和土的抗剪强度对比研究
CONTRAST STUDY ON FORECAST OF SHEAR STRENGTH OF UNSATU-RATED SOIL USING SOIL WATER CHARACTERISTIC CURVE
摘要
Abstract
At present,the engineering properties of unsaturated soil have become a hot topic in the geotechnical engineering field.The shear strength of unsaturated soil is particularly important for the engineering properties of soil.The authors have summarized four formulas which can forecast the shear strength of unsaturated soil using the soil water characteristic curve.The soil water characteristic curve of Majiagou Landslide Ⅰis obtained with the five bar pressure plate instrument.The MATLAB software and Van Genuchten model are used to fit the test data.The international advanced GDS unsaturated back pressure shear apparatus(UBPS)is used to proceed the direct shear tests on the unsaturated soil.The matric suction is controlled to be 50kPa and 100kPa.The relevant shear strength is obtained.Besides,the four predicted values of soil water characteristic curve and the test result are compared. The veracity of the predictor formulas is verified.Their merits and demerits are summarized.Finally,the Fredlund’s prediction formula is the most accurate one and the Huang-Runqiu’s formula is the most simple and practicable.关键词
土-水特征曲线/预测/抗剪强度/非饱和土Key words
Soil water characteristic curve(SWCC)/Forecast/Shear strength/Unsaturated soil分类
建筑与水利引用本文复制引用
郭利娜,胡斌,宋友建,张国超..土-水特征曲线预测非饱和土的抗剪强度对比研究[J].工程地质学报,2013,(6):849-856,8.基金项目
国家自然科学基金面上项目（41172281），国家科技部973项目（2011CB710604），中国博士后基金特殊项目（中博基［2009］13），中央高校基本科研业务费专项资金项目（摇篮人才计划CUGL100413），特色学科团队（CUG090104）资助． （）
