岩土力学Issue(11)：3180-3186,7.
基于多尺度直剪试验的岩石模型结构面抗剪强度特征研究
Study of shear strength characteristics of simulation rock structural planes based on multi-size direct shear tests
摘要
Abstract
It has important value of theory and practical significance to understand the mechanical characteristics of rock structural planes by taking direct shear tests for shear strength of simulation rock structural planes with different sizes (especially large sizes). Based on MSJ-DST, the direct shear tests of simulation rock structural planes in sizes 20 cm×20 cm, 40 cm×40 cm, 60 cm×60 cm, 80 cm×80 cm and 100 cm×100 cm are taken under the normal stresses from 200 kPa to 1 000 kPa. Then, the characteristics of shear strength of rock structural planes with different sizes are studied. The results indicate that the stresses and deformation characteristics of simulation rock structural planes under different normal stresses are similar; and the peak shear displacements are generally fluctuated in the vicinity of a certain value. Under the same normal stress, the peak shear strength values of simulation rock structural planes with different sizes are fluctuated in the vicinity of a certain value;and the residual shear strength values rise slightly as the size increases. Under five grade normal stresses, the variations of peak shear strength and residual shear strength with different sizes are approximately same;and the ratio of residual shear strength value and peak shear strength value increases and tends to be stable as normal stress increases.关键词
不同尺寸/岩石模型结构面/直剪试验/抗剪强度Key words
different sizes/simulation rock structural plane/direct shear test/shear strength分类
建筑与水利引用本文复制引用
黄曼,杜时贵,罗战友,倪骁慧..基于多尺度直剪试验的岩石模型结构面抗剪强度特征研究[J].岩土力学,2013,(11):3180-3186,7.基金项目
国家自然科学基金资助(No.41172292，No.41302257)；教育部新世纪人才计划项目资助(No. NCET-11-1080)；浙江省自然科学基金资助(No. LZ13D020001，No. LQ13D020001，No. LQ12E08004)；浙江省新世纪151人才第一层次(No.20121030)。 （No.41172292，No.41302257）
