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张升, 刘雪晴, 徐硕, 熊勇林, 张锋. 温度-循环荷载作用下饱和土的力学特性研究[J]. 岩土工程学报, 2018, 40(6): 994-1001. DOI: 10.11779/CJGE201806004
引用本文: 张升, 刘雪晴, 徐硕, 熊勇林, 张锋. 温度-循环荷载作用下饱和土的力学特性研究[J]. 岩土工程学报, 2018, 40(6): 994-1001. DOI: 10.11779/CJGE201806004
ZHANG Sheng, LIU Xue-qing, XU Shuo, XIONG Yong-lin, ZHANG Feng. Mechanical characteristics of saturated soils under thermo-cyclic loads[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(6): 994-1001. DOI: 10.11779/CJGE201806004
Citation: ZHANG Sheng, LIU Xue-qing, XU Shuo, XIONG Yong-lin, ZHANG Feng. Mechanical characteristics of saturated soils under thermo-cyclic loads[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(6): 994-1001. DOI: 10.11779/CJGE201806004

温度-循环荷载作用下饱和土的力学特性研究

Mechanical characteristics of saturated soils under thermo-cyclic loads

  • 摘要: 对高放核废料处置、地热资源开发利用等工程,土体在交变荷载作用下的大变形问题,必须考虑温度的影响。在上下负荷面的框架内,引入等价应力的概念,建立了能描述交变荷载作用下饱和土受温度影响的力学特性的本构模型。结合已有文献中的试验数据,对所建立的模型进行了验证。结果表明,模型计算结果较好地吻合了实验结果;通过控制模型参量,模型能够同时描述不同温度下饱和土的交变移动特性,揭示了温度升高对饱和土体抗变形能力增强的内在机理。建立的模型对研究饱和砂土在温度和循环载荷下共同作用下的力学性能具有参考意义。

     

    Abstract: The impact of temperature on the large deformation of nuclear waste disposal, geothermal extraction and storage under cyclic load is should be considered. In the framework of super-subloading surface, the concept of equivalent stress is introduced to establish a constitutive model. The model can represent the mechanical characteristics of saturated clay affected by thermo-cyclic loads. Based on the experimental data, the model is validated. The results show that the constitutive model can be used to calculate the experimental data. It can describe the alternating mobility of saturated soils at different temperatures by controlling the parameters of the model, and it is revealed that the increase of temperature is the inherent resistance to deformation mechanism. The model is of reference significance for the mechanical properties of saturated sand under temperature and cyclic loads.

     

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