舟山—岱山间西部海域第四纪海底沉积物物理力学指标统计分析

Statistic analysis of physical and mechanical indices of quaternary marine sediments in the western sea area between Zhoushan and Daishan Island

根据工程地质钻探资料,对舟山—岱山岛间西部海域第四纪沉积物的物理力学指标进行统计分析,发现本海区第四纪海底土具有含水量高、孔隙比大、高压缩性、抗剪强度低等特征。统计表明,物理指标之间、力学指标和物理指标之间因参数的不同,相关性和变异性具有明显的不同,且随着地层深度的变化,物理力学指标的变异系数变化较明显。物理指标和力学指标的回归方程表明,各力学指标与不同的物理指标之间具有较好的线性相关性。

According to the engineering geologic borehole data in the western sea area between Zhoushan Island and Daishan Island,the physical and mechanical indices of quaternary sediments are analyzed.The quaternary sediments are characterized by high water content,high void ratio,high compressibility and low shear strength.It is found that there are some differences of correlations and variability because of the difference of indices,and with the change of the depth,there is significant change between these indices.Regression equation shows that there is a good linear correlation between physical and mechanical indices.