单层地基一维渗流有效应力性状研究

Research on Characteristics of the Effective Stress for A One-Layered Ground under One-dimension Seepage

研究了一维渗流作用下单层地基有效应力的计算问题 ,推导了有效应力的计算公式 ,讨论了有效应力性状。定义了渗流有效应力的概念。单层地基一维渗流有效应力与渗流方向密切相关。渗流作用下土层有效应力由两部分组成 :一部分是自重有效应力 ,其由重力引起的 ,体现了静水压力的影响 ;另一部分是渗透有效应力 ,其由土层水头差产生的 ,体现了超静水压力的影响。

An analysis solution is given to the problem of calculation of effective stress(σ′) for a one-layered grouned under one-dimension seepage,the formulas for computing the σ′ are derved.Bawed on the formulas,the characteristics of σ′ discussed, and the effective stress of seepage is defined.The σ′ for a one-layered ground under one-dimension seepage is divided into two parts of such σ′ a one-layered ground under stress of seepage,the former embodying the effect of hydrostatical pressure is brought about by the weight,and the latter embodying the effect of super hydrostatical pressure is given rise to by the seepage.