考虑排水条件的软土蠕变特性及模型研究-岩土.PDFVIP

27 5 Vol.27 No.5 2006 5 Rock and Soil Mechanics May 2006 2006) 1, 2 1 3 4 1. 510632 2. 3. 518028 4. 430010 Singh-Mitchell Singh-Mitchell -- -- -- Singh-Mitchell -- TU 447 A Study on creep characteristics and model of soft soil considering drainage condition 1,2 1 3 4 ZHU Hong-hu , CHEN Xiao-ping , CHENG Xiao-jun , ZHANG Bo (1.Department of Mechanics and Civil Engineering, Jinan University, Guangzhou 510632, China; 2.Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China; 3.Shenzhen Geotechnical Engineering Co., Shenzhen 518028, China; 4. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China) Abstract: In order to investigate the creep behaviors of soft soil in Pearl River Delta, a series of laboratory drained and undrained triaxial creep tests were performed. The test results show that in drained condition, soft soil has large initial deformation but small creep deformation. While in undrained condition, creep effect is significant. It indicates that enhancing the drainage ability of soft soil foundation can reduce the probability of creep rupture. By introducing Singh-Mitchell creep equation, the drained and undrained creep models of soft soil are proposed, in which exponential function is adopted for stress-strain