岩石三轴多级围压加载试验方法与数据统计分析的研究  

The research of rock triaxial compression with multilevel confining pressure and the data statistics

作　　者：张磊[1] 王宝学[1] 杨同[1] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《实验技术与管理》2008年第2期43-47,共5页Experimental Technology and Management

摘　　要：试验规程规定常规的岩石三轴试验需要5件以上的岩石试件,对于岩石试件少或取芯困难的工程,就无法满足数量上的要求;其次岩石具有较大的离散性,常规岩石三轴试验得出的结果离散性较大。作者在刚性伺服三轴试验机上通过简单的控制方式,采用单块或少量试件,实现多级围压作用下加载的三轴试验,同时对数据进行了统计分析。使用该方法确定的粘聚力低于常规试验值而内摩擦角变化不大,同时该方法可以降低岩石试件间的差异对试验结果的影响。As a rule, conventional triaxial compression needs five or more specimens of rock. On the one hand, if there are a few specimens or it is difficult to take rock, the test can not be done. On the other hand, because the strength of rock is discrete; the result is discrete. Based on the servo- control testing machine, a method of triaxial compression taking only one specimen or several specimens with multilevel confining pressure is used, and the data are analyzed statistically. The cohesion tested by this method is lower than the result of conventional triaxial compression, but the internal friction angle is not changed too much; and the method can reduce the influence of the difference of rock specimens on the test results.

关 键 词：岩石力学 岩石三轴试验 多级围压 统计分析 

分 类 号：TV223.1[水利工程—水工结构工程]