盐岩蠕变特性温度效应的实验研究  

EXPERIMENTAL STUDIES ON TEMPERATURE DEPENDENT PROPERTIES OF CREEP OF ROCK SALT

作　　者：高小平[1] 杨春和[1] 吴文[1] 刘江[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩石力学与工程学报》2005年第12期2054-2059,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(E50434050)

摘　　要：对经历不同温度后的盐岩蠕变特性进行了实验研究,研究了应力水平和温度对盐岩蠕变特性的影响,通过实验获得的蠕变曲线和岩石参数,回归出了其稳态蠕变率本构方程。分析结果表明:偏应力和温度对盐岩稳态蠕变率影响较大;稳定蠕变应变率本构方程是作用在盐岩上的应力偏量的幂次函数和能量与温度的指数函数。并从盐岩蠕变模量随蠕变时间的变化规律入手,导出了以蠕变时间为自变量的损伤率演化方程和用损伤表示的蠕变模量演化方程。Experimental studies are made on the creep properties of rock salt after undergoing different high temperatures; the effect of stress level and temperature on creep of rock salt is analyzed. Through the creep characteristic curves and parameters, the steady state creep strain rate constitutive equation of rock salt is obtained by regression. The results indicate that the effects of deviatoric stress and temperature on the steady state creep strain rate of rock salt are obvious. The steady state creep strain rate is a power function of deviatoric stress and exponential function of temperature and energy. Based on the relation of creep modulus and creep time for rock salt, the creep damage evolution and creep damage constitutive equation are established.

关 键 词：岩石力学 盐岩 高温 蠕变 损伤本构方程 

分 类 号：TU457[建筑科学—岩土工程]