海洋科学2025，Vol.49Issue(7)：103-115,13.DOI:10.11759/hykx20241205002
海底沉积物温压环境三轴试验系统的研制与初步应用
Development and preliminary application of a triaxial test system for the temperature and pressure environment of submarine sediments
摘要
Abstract
To investigate the mechanical properties of deep-sea sediments under in situ stress and temperature con-ditions in the laboratory,a self-developed underwater sediment triaxial testing system with precise volumetric measurement capabilities was created.Building upon a geotechnical stress path triaxial testing system,the devel-oped system incorporates a dual water bath circulation design to achieve uniform and precise temperature control of sediment specimens and a dual pressure chamber design to enable high-pressure stress loading and precise volu-metric measurements under deep-sea pressure and temperature conditions.The system was tested for temperature control and triaxial test repeatability,and the results demonstrated stable and precise temperature control over ex-tended durations and reliable volumetric measurements under temperature-controlled conditions.Ottawa sand was used to prepare saturated sandy sediment specimens,and triaxial shear tests were conducted under four temperature conditions.The results indicated that within the range of 5-40℃,decreasing the temperature reduces the shear strength and deteriorates the shrinkage characteristics of the sand.The above tests preliminarily verified the relia-bility of the developed testing system,providing technical support for studying the mechanical properties of deep-sea sediments.关键词
砂质沉积物/三轴剪切/温压环境/控温条件/体变量测Key words
sandy sediments/triaxial shear/temperature and pressure environment/temperature control conditions/volumetric measurement分类
建筑与水利引用本文复制引用
马腾飞,王勇,贾鹏飞,徐国方,陈嘉锴..海底沉积物温压环境三轴试验系统的研制与初步应用[J].海洋科学,2025,49(7):103-115,13.基金项目
国家自然科学基金重大仪器专项(52127815) （52127815）
国家自然科学基金资助项目(52178372)Special Fund for Basic Research on Scientific Instruments of the National Natural Science Foundation of China,No.52127815 （52178372）
Nation-al Natural Science Foundation of China,No.52178372 （）
