重力水对非饱和土力学性能的影响规律研究

Study on rules of gravity water's influence on mechanical property of unsaturated soil

通过一系列控制基质吸力的非饱和土试验验证了重力水对非饱和土力学性能的重要影响,分析了产生这种影响的物理机制,以此为基础,讨论了Bishop的非饱和土有效应力公式的适用范围,提出了水气双连通状态下的有效应力的表达式,重新给出了非饱和土在各个连通状态下有效应力的表达式。

A series of experiments during which suction of ground substance is controled proves that gravity water has large influence on mechanical property of unsaturated soil. The following paper analyses mechanism that causing such influences, and on this basis, it not only discusses application scope of Bishop formula, but also proposes formula of available stress under condition of dual connectivity of vapor and gives available stress formula under every cinnective situation.