不同高径比下极软岩(泥岩)单轴抗压强度尺寸效应试验研究  

Experimental Study on Size Effect of Uniaxial Compressive Strength of Extremely Soft Rock(mudstone)Under Different Height Diameter Ratio

作　　者：薛鹏 任东兴 黄海 廖宏业 彭界超 XUE Peng;REN Dongxing;HUANG Hai;LIAO Hongye;PENG Jiechao(Chengdu Surveying Geotechnical Research Institute Corporation Limited of MCC,Chengdu 610023)

机构地区：[1]中冶成都勘察研究总院有限公司,成都610023

出　　处：《四川地质学报》2023年第4期713-716,共4页Acta Geologica Sichuan

摘　　要：以成都东部地区某工程项目勘察岩石试验成果为例,通过对岩石数据统计分析,发现泥岩在不同高径比下岩石单轴抗压强度数据呈现的差异性较大,对于岩石参数取值建议造成了很大影响。为进一步验证和分析尺寸效应对极软岩岩石单轴抗压强度的影响,通过建立对比试验模型、取样试验,分析了不同高径比的极软岩岩石单轴抗压强度差异特征,并对差异较大的原因和影响因素进行了阐述,对于工程勘察中极软岩单轴抗压强度试验的应用有一定借鉴意义。Taking the rock survey test results of an engineering project in eastern Chengdu as an example,through the statistical analysis of rock data,it is found that the uniaxial compressive strength data of mudstone under different heightdiameter ratios show great differences,which has a great influence on the recommendation of rock parameter value.In order to further verify and analyze the influence of size effect on uniaxial compressive strength of extremely soft rock,the difference characteristics of uniaxial compressive strength of extremely soft rock with different ratio of height and diameter were analyzed by establishing comparative test model and sampling test.The reasons and influencing factors of the difference are also expounded,which has certain reference significance for the application of uniaxial compressive strength test of extremely soft rock in engineering investigation.

关 键 词：高径比 极软岩 单轴抗压强度 尺寸效应 

分 类 号：TU398.7[建筑科学—结构工程]