摘要
干密度是表征黄土地基振密、挤密处理后主体紧密程度的一个重要物理指标。本文通过对不同于密度的非饱和击实土样的震陷试验，研究了于密度对击实黄土震陷性的定量影响规律，建立了击实黄土的震陷曲线方程，得到了不同振次下干密度与震陷系数的定量关系。文中提出了由干密度算不同振次和任一动应力下击实黄土震陷系数的经验公式，并为黄土地基抗震陷处理初步提供了干密度、波速、标贯和孔隙比等方面的标准．
Dry density is one of the most important physical indexes to indicate the compactedness of loess after it is treated with various methods of compaction. In this paper,based on the seismic settlement test of unsaturated compacted loess specimens with different dry densities, the quantitative relationship between dry density and seisndc settlement of compacted loess is revealed in expressions of equations for seismic settlement curves. The authors established the mathematical relationship between dry density and seisforc settlement coefficient under different cyclic times and proposed empirical formulas to estimate the seismic settlement coefficient of compacted loess with dry density. Furthermore, the criteria in dry density, wave velocity, SPT and void ratio forxthe seismic treatment of loess ground are provided.
出处
《地震工程与工程振动》
CSCD
北大核心
2000年第1期75-80,共6页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局"九五"重点项目!95-05-02-03-03
中国地震局兰州地震研究所论著!LC1999071
关键词
击实黄土震陷
干密度
地基处理
试验研究
compacted loess, seismic settlement, dry density, effect, treatment of ground
