南黄海中部海底沉积物剪切波速度测量及其与物理力学性质参数的关系  

Shear Wave Speeds Measured for Sediments From the Middle of the Southern Yellow Sea and Their Correlations With Physical-mechanical Parameters

作　　者：阚光明[1,2] 张一凡[3] 苏远峰[1,2] 李官保[1,2] 孟祥梅[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]国家海洋局海洋沉积与环境地质重点实验室,山东青岛266061 [3]中国海洋大学海洋地球科学学院,山东青岛266100

出　　处：《海洋科学进展》2014年第3期335-342,共8页Advances in Marine Science

基　　金：国家自然科学基金项目--南黄海中部海底沉积物声学特性及地声模型研究(41106061);国家海洋局青年基金项目--温度和压力变化对海底沉积物声学特性影响及校正方法(2012318);国家海洋局第一海洋研究所基本科研业务费专项资金项目--南黄海中部海底原位地声模型研究(GY0213G24)

摘　　要：采用弯曲元剪切波测试方法对在南黄海中部采集到的沉积物样品进行了剪切波速度测试,基于所获得的剪切波速度数据,分析了研究区沉积物剪切波速度特性及分布规律.分析表明,沉积物剪切波速度为12.05～74.55 m/s,总体相对较低.浅表层沉积物剪切波速度呈现出分区域分布特征,可分为东北部低速区、西南部高速区、北西-南东向梯度带以及测区东南部的低速背景上的串珠状高速异常区四个区域.通过回归分析,建立了剪切波速度与密度、含水率、孔隙比、孔隙度、液限、塑限、压缩系数、抗剪强度等沉积物物理力学参数之间相互关系的经验回归公式.回归分析结果表明,海底沉积物剪切波速度与上述物理力学参数之间均具有较好的相关性,相关系数R均大于0.80.The shear wave speeds of core samples collected from the middle of the Southern Yellow Sea are measured using bender elements method,and then the properties of shear wave speeds and its spatial distribution are analyzed based on the measured data of shear wave speeds.It is demonstrated that the shear wave speeds of the study area are relatively low,ranging form 12.05 m/s to 74.55 m/s.The zonal distribution of shear wave speeds are divided into four sub-zones：low speed sub-zone in the northeast; high speed sub-zone in the southwest; speed gradient band aligning from northwest to southeast; and highspeed beaded anomaly in the low speed background in the southeast.The empirical equations with good coefficients （R＞0.80） between shear wave speeds and physical-mechanical parameters,such as density,percent moisture,porosity ratio,percent porosity,liquid limit,plastic limit,compression coefficient,shear strength of seafloor sediments,were built up by means of regression analysis.

关 键 词：海底沉积物 剪切波速度 弯曲元系统 经验回归公式 南黄海 

分 类 号：P733.23[天文地球—物理海洋学] P736.21[天文地球—海洋科学]