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本文阐述了对海底沉积物样品在应力-应变过程中进行同步声学测量的实验工具和方法,分析了采自南海45个站位的海底沉积物样品的实验数据资料,结果表明,沉积物颗粒越粗、孔隙越小、无侧限抗压强度越大,声速越高。沉积物样品在受力应变过程中,声速具有明显的随应力而变化的特征。进一步探讨了不同应变阶段沉积物的声学特征以及应力所导致沉积物微结构变化对其声速的影响过程,这一研究将在石油地质测井和海底工程基底稳定性评价等方面具有重要的应用意义。
This paper presents experimental tools and methods for simultaneous acoustic measurements of seafloor sediment samples during stress-strain. The experimental data of seafloor sediment samples collected from 45 stations in the South China Sea are analyzed. The results show that the sediment particles Coarse, less porous, unconfined compressive strength, the higher the sound velocity. Sediment samples in the stress-strain process, the sound velocity has a significant change with the stress characteristics. The acoustic characteristics of the sediments at different strain stages and the influence of the microstructural changes on the sound velocity caused by the stress are further investigated. This study will be of great significance in the aspects of petroleum geological logging and the stability evaluation of the submarine engineering basement .