摘要
根据36组直剪试验结果,对基于起伏度和粗糙度等剪切强度公式进行对比,给出其建议适用性范围.研究结果表明:在只考虑起伏度时,Ladanyi-Archambault公式的计算结果更接近实际值;而只考虑粗糙度时,采用JRC-JMC模型和Grasselli改进公式进行预测更加合理;节理岩体的峰值剪切强度与法向应力有关,当法向应力较小时,节理面起伏度是节理岩体峰值强度的主要影响因素,而随着法向应力的增大,采用粗糙度计算结果与实际值相吻合.
According to 36 direct shear test results, the various shear strength equations based on waviness or roughness were investigated, and their adaptability was suggested. The results show that the calculation result of Ladanyi-Archam bault is close to experimental value when considering only waviness, and the calculation results of JRC-JMC model and Grasselli formula are more reasonable than others when considering only surface roughness. The peak shear strength of joint rock mass is related to normal stress, for small normal stress, the waviness is the main influencing factor; with in- creasing normal stress, the calculation results considering roughness conform well to the experimental values.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2013年第5期570-575,共6页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(51278208)
福建省交通科技发展基金资助项目(200910)
关键词
岩体力学
节理岩体
峰值剪切强度
粗糙度
起伏度
rock mechanics
jointed rock mass
peak shear strength roughness
waviness
