含水砂岩在不同应变率下的三轴抗压强度分析  

Analysis of three axis compressive strength of water bearing sandstone under different strain rates

作　　者：张军[1] 高富强[2] 杨金金[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]洛阳理工学院土木工程学院,河南洛阳471023

出　　处：《河南城建学院学报》2016年第2期37-40,共4页Journal of Henan University of Urban Construction

摘　　要：对砂岩在不同含水率、应变率和围压条件下进行三轴压缩试验,试验统计了这3个因素耦合作用时砂岩抗压强度的平均值,并分析了含水率、应变率及围压对砂岩抗压强度的影响规律,结果发现砂岩强度的影响因素中含水率、应变率和围压之间,存在一定的相互影响关系。经过进一步试验研究表明:含水砂岩在低应变率下的围压硬化效应显著;围压的存在,使得含水率对砂岩强度的应变率强化效应和应变率对砂岩强度的含水弱化效应都没有明显的规律。The three axial compression tests are carried out under different water content,strain rate and confining pressure,and count the average values of the compressive strength of sandstone during the coupling of these three factors. The influence of water content,strain rate and confining pressure on the compressive strength of sandstone is analyzed. The results show that the influence factors of sandstone strength,moisture content,strain rate and confining pressure have a certain mutual influence relationship. Further research shows that it is significant for the confining pressure hardening effect of aqueous sandstone at low strain rates. and there is no obvious law of the effect of strain rate strengthening effect and strain rate on the strength of sandstone under the confining pressure.

关 键 词：含水率 应变率 围压 耦合 抗压强度 

分 类 号：TU452[建筑科学—岩土工程]