大理岩蠕变特性试验研究  

TESTING STUDY ON CREEP CHARACTERISTICS OF MARBLE

作　　者：李化敏[1,2] 李振华[1] 苏承东[1] 

机构地区：[1]河南理工大学资源与材料工程系 [2]中国矿业大学资源学院北京100083

出　　处：《岩石力学与工程学报》2004年第22期3745-3749,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：河南省创新人才基金;河南省自然科学基础研究项目(0211051300)资助课题。

摘　　要：岩石的流变特性是岩石重要的力学特性之一,它控制着岩石的蠕变参数。利用自行研制的UCT-1型蠕变试验装置,采用单调连续加载和分级加载方式,对南阳大理岩进行了单轴压缩蠕变试验研究。根据试验结果,将蠕变强度与瞬时强度进行了比较,得出蠕变强度与瞬时强度之比为0.9左右的结论。拟合试验曲线得出了蠕变曲线经验公式,认为蠕变试验曲线接近对数规律;并分析了曲线的特点,建立了由Kelvin模型和Maxwell模型串联组成的Burgers大理岩蠕变理论模型,求出了相应的蠕变参数。Rheological characteristic is one of the most important mechanical characteristics of rock. It controls the creep deformation. By continuously loading and multi-stage loading,the creep test on Nanyang marble is performed by using the self-developed UCT-1 apparatus of creep test. The creep strength is compared with the instantaneous strength based on the test results,and the ratio of creep strength to instantaneous strength is about 0.9. An empirical formula of creep curve is obtained by data fitting and it approaches to the logarithmic rule. The Burgers theoretical model by Kelvin model and Maxwell model is established by analyzing the features of the curve and its parameters are obtained.

关 键 词：岩石力学 大理岩 蠕变试验 理论模型 蠕变参数 

分 类 号：TU452[建筑科学—岩土工程]