摘要
对采用混合可压缩流体方法分析非饱和土一维固结问题的固结方程进行了求解,在得到的解析解的基础上,对影响非饱和土一维固结的因素进行了分析。分析结果表明,在采用混合流体方法计算非饱和土一维固结的孔隙水压力时,所用公式与计算饱和土一维固结的太沙基理论公式基本相同,不同之处在于引入Bishop有效应力系数来体现孔隙气对孔隙水的影响。而在非饱和土孔隙气压的计算公式中除了体现孔隙水对孔隙气的影响参数以外,还有体现孔隙气体的可压缩性对固结影响的参数。在所有影响因素中,影响非饱和土一维固结最重要的因素是孔隙流体的渗流路径。
Analytical solutions of equations,which described one-dimensional consolidation of unsaturated soil using mixed compressible fluid method,were educed.The effects of parameters of soil on one-dimensional consolidation of unsaturated soil were discussed based on the above analytical solutions.It is confirmed that the formula for evaluating the pore-water pressure in unsaturated soil by the method is almost identical to that of Terzaghi theory,which is often used in analysis of one-dimensional consolidation of saturated soil,except for the Bishop effective stress parameter which describe the effect of pore-air on pore-water in unsaturated soil.In the formula of computation of pore-air,there is not only Bishop effective stress parameter describing the effect of pore-water on pore-air,but also compressibility of the pore-air that affect the rate of consolidation of unsaturated soil.In all the factors that influence the rate of consolidation of unsaturated soil,the most important one is the seepage path of fluid.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第8期2661-2665,共5页
Rock and Soil Mechanics
关键词
非饱和土
一维问题
固结
混合流体
解析解
unsaturated soil
1D problem
consolidation
mixed fluid
analytical solution.
