【摘要】 对金坛盐岩蠕变规律进行了试验研究,分析了不同应力状态和温度对盐岩蠕变特性的影响,通过试验获取了蠕变曲线和蠕变特征参数。根据其蠕变曲线特征,用黏弹塑性理论建立了盐岩蠕变本构模型。试验结果表明,稳态蠕变率是偏应力和温度的非线性函数关系,并提出盐岩的稳态蠕变本构方程。通过试验数据拟合得到本构方程中的参数,将理论和试验结果进行比较,结果表明两者的吻合性较好。更多还原

【Abstract】 Uniaxial and triaxial creep tests have been performed on rock salt of Jintan Salt Mine on high temperature and high pressure triaxial rheological device;the creep characteristics of rock salt are investigated and the effect of stress state and temperature of rock salt are analyzed;and then the creep characteristic curve and parameters are obtained.Based on the character of creep curve of rock salt,a creep constitutive model of rock salt is established by using viscoelasto-plastic theory.Through the test results,it is shown that the steady state creep strain rate is a nonlinear function of diviatoric stress and temperature;a steady state creep constitutive model of rock salt is established.The patameters of constitutive equation are obtained by fitting test data;the theoretic results is proved well by comparison with the experimental results.更多还原