MECHANICAL BEHAVIOR OF SOILS PARTLY SATURATED BY OIL: AN EFFECTIVE STRESS APPROACH
There are rare cases in the literature where the effective stress parameter is determined in multiphase situations involving oil as a separate phase. Even, in multi-phase systems consisting of a non-wet and a wetting fluid, it is not completely known whether the current formulae for the effective stress parameter can be applicable for all types of nonwetting fluids. More specifically in such cases, when, the wetting fluid is not water (for instance soils partly saturated by oil) determination of the effective stress and application of an effective stress approach has not still been fully explored. In order to address the above mentioned questions, a research is conducted using the available data of soils partly saturated by oil and an appropriate procedure for the determination of the effective stress parameter is presented which captures variation of the effective stress parameter with net stress as well. Based on the obtained results, scope of application of the effective stress is extended to the oil contaminated soils and a general equation is derived for determination of the shear strength of such soils. Moreover, an equation is proposed to describe variation of the effective stress parameter, χ, both with suction level and net stress.
Unsaturated Soil Oil Effective Stress Volume Change Mechanical Behavior
E. Nikooee A. Moadeli M. Heydari M. Ajdari G Habibagahi
Dept. of Civil and Environmental Eng., School of Engineering, Shiraz University, Shiraz, Iran
国际会议
上海
英文
192-198
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）