两种沉积物粒度分析测试方法对比及转换关系  

Comparison and Conversion Relationship between Two Methodsof Sediment Particle Size Analysis

作　　者：钱磊 孙吉主[1] 王勇[2] 李坤[1] QIAN Lei;SUN Ji-zhu;WANG Yong;LI Kun(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071

出　　处：《长江科学院院报》2024年第2期159-166,共8页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(52127815,51979269)。

摘　　要：粒径分布(PSD)作为土体的基本物理性质之一,对土体的工程性质具有很大影响。目前,测量海洋沉积物PSD存在不同的方法,但不同方法量测结果的一致性和相互关系值得探讨。基于PSD沉降分析法与激光衍射法的测试原理,推导得出两种方法之间的联系,并提出了一种转换方法。采用上述两种测量方法对两种不同海域的深海沉积物进行PSD分析,依据转换方法对激光衍射法得到的PSD进行转换,并将转换后的结果进行分析。结果显示:沉降分析法与激光衍射法所得结果主要差距在于黏土、粉砂粒径的含量,且经转换后,两种测量方法得出的黏土、粉砂粒级的百分含量基本一致,检验了转换方法的可靠性。Particle size distribution(PSD)is a fundamental physical property that significantly influences the engineering properties of soil.Various methods exist for measuring PSD in marine sediments;however,the consistency and correlation between different measurement results need to be discussed.We deduced the relationship between sedimentation analysis method and laser diffraction method,and proposed a conversion method based on their testing principles.By employing the two methods,we analyzed the PSD of deep-sea sediment samples from the South China Sea and the Shenhu Sea area,and then converted the PSD obtained from laser diffraction method according to the conversion relationship.Results reveal that the difference between sedimentation analysis method and laser diffraction method mainly lies in the content of clay and silt particles.After the conversion,the measured percentages of clay and silt particles align well between the two methods,validating the reliability of the proposed conversion.

关 键 词：深海沉积物 粒度分析 沉降分析法 激光衍射法 转换方法 相关性 

分 类 号：TU41[建筑科学—岩土工程]