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为了解温度周期作用对大理岩蠕变力学特性的影响,采用温度-应力-渗流耦合的岩石力学三轴流变试验系统对大理岩进行了不同温度及温度周期变化下三轴压缩蠕变试验。基于试验结果,研究了大理岩试样在不同温度及温度周期变化下轴向应变随时间的变化规律,分析了不同温度及温度周期变化下蠕变的变形机制,掌握了温度对大理岩三轴蠕变影响的基本规律,并且建立了考虑温度及温度周期变化影响的改进的Burgers模型。理论值与试验结果非常接近,表明考虑温度及温度周期变化的改进Burgers模型适合描述大理岩的黏弹性蠕变特征。为长期暴露于外部环境下的岩质边坡的长期稳定性分析提供了重要的参考依据。
In order to understand the effect of temperature cycle on the creep mechanical properties of marble, a triaxial compression creep test was carried out on the marble under varying temperature and temperature cycles by using the rock mechanics triaxial rheological test system coupled by temperature-stress-seepage. Based on the experimental results, the variation of axial strain of marble specimens with time under different temperature and temperature cycles was studied. The deformation mechanism of creep under different temperature and temperature cycles was analyzed. The influence of temperature on the triaxiality of marble Creep effect, and establish an improved Burgers model that considers the effect of temperature and temperature cycle changes. The theoretical values are in good agreement with the experimental results, indicating that the modified Burgers model, which takes into account temperature and temperature cycles, is suitable for describing the viscoelastic creep characteristics of marble. It provides an important reference for the long-term stability analysis of rock slope exposed to external environment.