摘要
根据 HY12 6 - 0 4项目 1998年 9月的航次调查及随后的沉积物样品的实验室分析资料 ,从物理性质和力学特征各方面对南黄海海底沉积物进行了综合工程地质特性研究 ,发现本区沉积物结构、剪切特征、含水量和液塑限随深度的变化而变化 ;本区样品主要为粒径较细的软沉积物 ,具有高含水量、中—高塑限、高压缩性和抗剪切强度小的物理力学特性。并对样品的物理性质和力学特征二者关系进行回归分析 ,得出回归方程。
A cruise investigation of the geotechnical properties of sediments in oil resource area in South Yellow Sea in September 1998 was a part of HY126 04 project.This investigation indicated that texture,shear strength,natural density,void ratio,water content and liquid limit of the sediments vary significantly with depth:void ratio,water content and liquid limit decrease with depth,while shear strength increases with depth,which was according with the variation of clay in the sediments.Samples were predominantly soft and fine grained.Sediments had high water content,medium to high plasticity,high compression degree and low shear strength.The regression equations were obtained after mechanical indexes( C,φ,a 1-2 ) and physical indexes( ρ,w,e,w L, I L)were given regression analysis.Natural density influences mud compression in this area,and water content influences shear strength of muddy clay and silty clay.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2001年第3期37-41,共5页
Marine Geology & Quaternary Geology
基金
国家海洋局青年海洋科学基金资助项目 (2 0 0 0 5 0 7)
