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The deep-water temperature and pressure environments and their variations significantly influence the mechanical properties of sediments. To enable laboratory experimental studies on deep-sea sediment soils, an independently developed high-pressure temperature-controlled geotechnical triaxial testing system capable of precise volumetric strain measurement has been established. Building upon conventional geotechnical stress-path triaxial testing systems, this innovative apparatus achieves uniform and accurate temperature control through a dual internal and external water bath circulation design. A dual-pressure chamber with internal and external pressure balance enables precise measurement of specimen volumetric strain under high-pressure stress loading and temperature-controlled conditions. The temperature control testing of the experimental system demonstrates that the developed high-pressure temperature-controlled triaxial experimental system can maintain precise and stable temperature control over extended periods. This experimental apparatus provides essential technical support for conducting deep-water soil mechanics research in laboratory settings.

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Development of a High-Pressure Temperature-Controlled Geotechnical Triaxial Testing System

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Tengfei Ma,
  • Yong Wang,
  • Pengfei Jia,
  • Guofang Xu,
  • Jiakai Chen

摘要

The deep-water temperature and pressure environments and their variations significantly influence the mechanical properties of sediments. To enable laboratory experimental studies on deep-sea sediment soils, an independently developed high-pressure temperature-controlled geotechnical triaxial testing system capable of precise volumetric strain measurement has been established. Building upon conventional geotechnical stress-path triaxial testing systems, this innovative apparatus achieves uniform and accurate temperature control through a dual internal and external water bath circulation design. A dual-pressure chamber with internal and external pressure balance enables precise measurement of specimen volumetric strain under high-pressure stress loading and temperature-controlled conditions. The temperature control testing of the experimental system demonstrates that the developed high-pressure temperature-controlled triaxial experimental system can maintain precise and stable temperature control over extended periods. This experimental apparatus provides essential technical support for conducting deep-water soil mechanics research in laboratory settings.