点荷载强度试验经验公式影响因素分析  

Analysis of Influencing Factors of Empirical Formula for Point Load Strength Test

作　　者：刘牧 LIU Mu(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250000,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250000

出　　处：《路基工程》2022年第6期107-112,共6页Subgrade Engineering

摘　　要：岩石点荷载强度试验作为一种常见的岩石强度试验测试方法,应用越来越广泛。国内外学者在实践中总结出了大量的经验公式,证明饱和单轴极限抗压强度与岩石点荷载强度指数之间具有线性关系,但由于采取试样受地域、岩性、强度、结构构造的不同,其经验公式有一定的差异。在实践中发现,其相关性受岩石坚硬程度、岩体完整程度、岩层产状等多因素影响,通过采取一定量的岩石试样分别从岩石坚硬程度、岩体完整程度、岩层产状等方面分组对其统计分析,得出各因素对岩石点荷载强度指数和饱和单轴极限抗压强度相关性的影响程度,为工程实践提供参考。As a common rock strength test method,rock point load strength test is more and more widely used.Scholars at home and abroad have summarized a large number of empirical formulas in practice.It is proved that there is a linear relationship between saturated uniaxial ultimate compressive strength and rock point load strength index.However,due to the different regions,lithology,strength and structural structure,the empirical formulas are different.In practice,it is found that the correlation is affected by many factors such as rock hardness,rock integrity and rock occurrence.A certain amount of rock samples are taken to statistically analyze them from the aspects of rock hardness,rock integrity and rock occurrence.The influence degree of each factor on the correlation between rock point load strength index and saturated uniaxial ultimate compressive strength is obtained,and it provides references for later engineering practice.

关 键 词：饱和单轴极限抗压强度 岩石点荷载强度指数 相关性 岩石坚硬程度 岩体完整程度 岩层产状 

分 类 号：TU458[建筑科学—岩土工程]