摘要
岩体中的节理通常会对岩体的破坏特性产生决定性的影响,本文通过对单轴压缩试验条件下含不同倾角节理的岩体试样破坏过程的数值试验,发现由于岩石材料的非均匀性,不含节理时岩石试样的宏观破坏主裂纹位置和方向不确定,具有一定的随机性,而且峰值强度较高;含节理的岩体宏观破坏时主裂纹明显受节理的影响,除节理倾角0°情况外,主裂纹均与节理的上下端相连;含节理岩体的峰值强度均低于不含节理的岩体,并且节理倾角60°以下时岩体峰值强度较低,而60°以上时峰值强度开始明显升高,90°时甚至接近不含节理的岩体。
Usually joints will produce decisive effects to failure properties of rock masses. This paper finished numerical tests of failure process on jointed rock masses with different inclined angles in uniaxial compression, found that the location and direction of main crack on rock masses without joint were uncertain and random, the peak strength was highest. The main cracks of jointed rock masses were effected obviously with joints, excepted the joint inclined angle was 0°, all main cracks connected with high and low points of joints. All peak strength of jointed rock masses were lower than rock masses without joint. The peak strength were low when the joints inclined angles under 60°, but the peak strength began to rise when the joints inclined angles beyond 60°, even the peak strength was close to the rock masses without joint which the joints inclined angles was 90°. Clearly, the joint inclined angle affects obviously the strength and failure properties of rock masses, so we should adopt different design basing on the stress direction of rock masses and the joints indined angle to insure the safety and efficient of engineering.
出处
《辽宁科技大学学报》
CAS
2015年第6期463-466,共4页
Journal of University of Science and Technology Liaoning
基金
辽宁科技大学创新创业训练计划专项经费资助项目(201510146047)
辽宁省教育厅优秀人才经费资助项目(LJQ2013033)
关键词
节理倾角
岩体破坏
单轴压缩
数值试验
joint inclined angle
failure of rock masses
uniaxial compression
numerical tests
