【摘要】 针对南京红山窑水利枢纽工程中原状膨胀红砂岩,采用RMT—150B多功能刚性岩石伺服试验机,对不同吸水率状态下的红砂岩圆柱体试件进行常规直接剪切试验,试验结果表明:膨胀红砂岩的抗剪强度与吸水率密切相关,随着吸水率的增加,粘聚力和内摩擦角都明显降低。膨胀红砂岩的吸水率对粘聚力的影响比对内摩擦角的影响要大的多,而且吸水率的变化幅度越大影响越明显。更多还原

【Abstract】 Aimed at the intact swelling red sandstone of Nanjing Hongshanyao hydro-junction project,we carry out the conventional direct shear test to cylinder specimen of the red sandstone under different state of water absorption rate by making use of RMT—150B multifunctional rigidity rock servo testing machine.The test results show that the shear strength of swelling rock is closely related to its water absorption rate,cohesion and internal friction angle will clearly decrease with the increasing of water absorption rate.The influence of water absorption rate to cohesion is much larger than that of internal friction angle.Moreover,the more water absorption rate changes,the more obvious influence is.更多还原