黄土状土和火山灰粘性土的动剪强度研究

实际地震危害表明，不仅饱和的细砂、粉砂地基会产生液化，而且饱和的粉土、粉质土地基也会产生液化．文中通过对我国西北地区特殊土———黄土状土和日本的特殊土———火山灰粘性土（广泛分布于日本关东地区，且大量用于道路填土工程）进行了一系列动力三轴试验，研究了它们在动荷作用下的动力特性，孔隙水压力的变化以及动、静强度的比较，测定并分析了不同的固结比对破坏时土的动剪强度和动孔隙水压力的影响，得出了黄土状土的动剪强度随相对密度变化的关系及火山灰粘性土的动剪强度随固结比变化的关系式．

Dynamic Shear Strength of Loessial Soils and Volcanic Cohesive Soils

Past earthquake observations show that liquefaction occurs not only in saturated sand soils but also in saturated silt soils. In this paper, a series of dynamic triaxial tests were conducted for normally consolidated/ over consolidated Chinese north west loessial soils and Japanese volcanic cohesive soils. Determined are the influences of consolidation ratio on the dynamic shear strength and pore water pressure. Dynamic and static strength of these soils are also compared. Two relationships are obtained: one is between the dynamic shear strength and relative density for loess like soils and the other is between the dynamic shear strength and consolidation ratio for volcanic soils.