摘要
以泥质粉砂岩和褐红色泥岩为对象,研究单轴压缩条件下软岩干燥和饱和状态时的各向异性力学特征,包括变形各向异性特征和强度各向异性特征.试验结果表明:泥质粉砂岩和褐红色泥岩的弹性模量、单轴抗压强度饱和后均大幅下降,而泊松比增大;饱水后泥质粉砂岩的弹性模量在垂直于层理方向的降低幅度明显小于平行方向,而单轴抗压强度在垂直于层理方向的降低幅度则略大于平行方向,泊松比的变化幅度相差不大;饱水后褐红色泥岩的泊松比在垂直于层理方向的增大幅度明显小于平行方向,而弹性模量和单轴抗压强度变化幅度相差不大.
Taking clayey siltstone and brown mudstone as the subjects, the anisotropic mechanics behaviour of soft rock in the state of drying and saturation under uniaxial compression has been studied, including deformation anisotropy and strength anisotropy. The experimental results show： after being saturated the elastic modulus and the uniaxial compressive strength of clayey siltstone and brown mudstone decreased significantly but the Poisson ratio increased; the decreasing range of the elastic modulus of clayey siltstone in the direction parallel to the bedding is much less than that in the vertical direction, the decreasing range of the uniaxial compressive strength in the direction parallel to the bedding is slightly larger than that in the vertical direction, but the Poisson ratio changes little; the increasing range of the Poisson ratio of brown mudstone in the direction parallel to the bedding is slightly larger than that in the vertical direction, but the elastic modulus and the uniaxial compressive strength change little.
出处
《福州大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期272-276,共5页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(50639090)
福州大学科技发展基金资助项目(826301)
关键词
软岩
各向异性
层理
变形参数
强度参数
soft rock
anisotropy
bedding
deformation parameter
strength parameter
