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<p>A series of laboratory studies was conducted to investigate the thermal effects on the interface shear behavior of overconsolidated marine sediments from the South China Sea, obtained at a depth of 2400&#xa0;m. A modified triaxial instrument was used to measure thermal strain and pipe displacement before the shear test, and shear stress during the shear test. The effects of temperature on the interface properties were discussed. The thermal strain behavior of marine sediments depended on the applied stress history and temperature path. Relative displacement between marine sediments and the pipe occurred. The shear stress between marine sediments and the pipe exhibited softening behavior. The peak shear stress of marine sediments increased with rising temperature values, effective confining pressure, and temperature cycle gradient. Specifically, the shear stress of marine sediments increased within the temperature cycle range of 0 to 1 cycle and then decreased within the temperature cycle range of 1 to 10 cycles. The impact of temperature on the interface is related to its effects on both marine sediments and the pipe.</p>

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Thermal effects on the interface shear behavior of overconsolidated marine sediments

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Xinrui Zhang,
  • Haojie Shi,
  • Gangqiang Kong,
  • Hui Li,
  • Haifeng Zhang,
  • Zihua Jiang,
  • Qing Yang

摘要

A series of laboratory studies was conducted to investigate the thermal effects on the interface shear behavior of overconsolidated marine sediments from the South China Sea, obtained at a depth of 2400 m. A modified triaxial instrument was used to measure thermal strain and pipe displacement before the shear test, and shear stress during the shear test. The effects of temperature on the interface properties were discussed. The thermal strain behavior of marine sediments depended on the applied stress history and temperature path. Relative displacement between marine sediments and the pipe occurred. The shear stress between marine sediments and the pipe exhibited softening behavior. The peak shear stress of marine sediments increased with rising temperature values, effective confining pressure, and temperature cycle gradient. Specifically, the shear stress of marine sediments increased within the temperature cycle range of 0 to 1 cycle and then decreased within the temperature cycle range of 1 to 10 cycles. The impact of temperature on the interface is related to its effects on both marine sediments and the pipe.