摘要
碳酸盐岩单轴抗压强度试验结果表明,其应力—应变曲线可分为压密、弹性变形和塑性变形直至破坏三个阶段,白云岩的三个典型变形阶段比灰岩更为明显。灰岩在塑性变形达到破坏后,残余强度持续下降,最终维持在一稳定值;白云岩在塑性变形达到破坏后,其残余强度在峰值强度附近动荡回升,相应的单轴抗压强度明显高于灰岩,而角砾状灰岩、白云质灰岩、灰质白云岩的应力—应变曲线和强度变化规律则介于灰岩和白云岩之间。
The uniaxial compression strength test results of carbonate rock shown that the stress-strain curves can be divided into compaction, the elastic deformation and plastic deformation up to breach stages. The three typical deformation stages of dolomite limestone is more obvious than limestone. The residual strength of limestone continued to decline when its plastic deformation up to breach, and the residual strength was maintained to a stable value in the final. But the residual strength of dol- omite limestone was turbulence pick-up in vicinity of the peak value when the dolomite limestone enter into the cause of plastic deformation. The of uniaxial compressive strength of dolomite limestone was significantly higher than that of limestone. The changes of stress-strain curves and strength of brecciated limestone, dolomitic limestone, gray dolomite is in the range of varia- tion between the limestone and dolomite.
出处
《土工基础》
2009年第2期80-82,共3页
Soil Engineering and Foundation
基金
中国科学院武汉岩土力学研究所知识创新工程领域前沿项目(NoO712041Q01)
国家自然科学基金重点项目(No50639010)
岩土力学与工程国家重点实验室自主课题重点项目(SKLZ08031)
关键词
碳酸盐岩
单轴压缩
应力-应变
强度
carbonate rock, compression strength, stress-strain relationship
