岩土力学Issue(1)：7-24,18.
软黏土加载速率效应特性试验研究：进展与趋势
Progress and trend of experimental investigation on rate-dependent behavior of soft clays
摘要
Abstract
Extensive laboratory tests and field observations show that soft clay exhibits significant rate-dependent behavior. Based on published data from the view of the rate dependencies of preconsolidation pressure and undrained shear strength. The rate-dependencies of soft clays under both 1D and 3D conditions are first studied. The applicability of five rate-dependency equations (two equations in exponential form and three equations in logarithmic form) in correlating the preconsolidation pressure and the undrained shear strength with strain-rate is then discussed. Rate parameters under both 1D and 3D conditions for various clays are estimated by using five rate-dependency equations and correlated with Atterberg limits. Furthermore, the rate-dependencies of soft clays under complex stress conditions including shear vane tests and pressuremeter tests are also analyzed. Then, the uniqueness of rate-dependency between 1D and 3D, between triaxial compression and extension, between different OCR (over consolidation ration) conditions is discussed. Finally, the influence of applied strain-rate on the stress-dilatancy of Hong Kong marine clay for triaxial compression and tension tests under different OCR conditions is investigated with some typical stress-dilatancy equations. The results show that the existing typical stress-dilatancy relationships need further enhancement (e.g., amount, anisotropy) for better describing the stress-dilatancy of soft clays.关键词
软黏土/先期固结压力/抗剪强度/速率效应/应力剪胀/等应变率/香港海积相沉积物Key words
soft clay/preconsolidation pressure/shear strength/rate-dependency/stress-dilatancy/constant ratio of stain(CRS)/Hong Kong marine deposits (HKMD)分类
建筑与水利引用本文复制引用
朱启银,尹振宇,朱俊高,王建华,夏小和..软黏土加载速率效应特性试验研究：进展与趋势[J].岩土力学,2014,(1):7-24,18.基金项目
国家自然科学基金(No.41240024, No.41372285)；欧盟玛丽居里行动计划(No. PIAPP-GA-2011-286397)；高等学校博士学科点专项科研基金(No.20110073120012)；上海市浦江人才计划项目(No.11PJ1405700)。 （No.41240024, No.41372285）
