摘要
选取黄河三角洲潮坪上初始沉积物相同 ,后期经历的水动力作用具有显著差异的地点 ,钻探采集原状土样 ,进行微结构扫描电镜观测分析 ,研究水动力作用对黄河水下三角洲沉积物微结构改造。发现水动力作用对已有海床沉积物微细结构的显著改造 ,包括细粒物质的分布与存在形式 ;颗粒的均匀性 ;颗粒的形状及排列的定向性。上述微结构的变化机理尚不清楚 。
Samples of the same original sediments experienced different intensive hydrodynamic action were selected on the tidal plat of subaqeous delta of Yellow River, China, to research the transform of soil microstructures induced by wave action. We took undisturbed soil samples with light drilling machine and analyzed their microstructures features with SEM,and found some special and interesting phenomena of wave reformed microstructures of deposited sediments on the seabed by wave,including various aspects such as the content, distribution and exiting situation of fine grain component, the grain uniformity, the grain shape, and the arrangement of sediment grain. However, the mechanism of these microstructure transform is not clear now, but may be related to heterogeneous liquefaction or thixotropy of the silt in Yellow River Delta.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2004年第5期654-658,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助 (40 1 72 0 88)
山东省自然科学基金资助项目 (Q99E1 0 )
国家重点规划项目 (973 )(2 0 0 2CB41 2 4 0 0 )
关键词
水动力作用
黄河口粉土
微结构改造
扫描电镜
非均匀液化(触变)
hydraulic action
silt of Yellow River Delta
microstructure transform
SEM
heterogeneous liquefaction or thixotropy
