典型岩石和土的Skempton系数特征.pdfVIP

第24 卷 第11 期 岩石力学与工程学报 Vol.24 No.11 2005 年6 月 Chinese Journal of Rock Mechanics and Engineering June ，2005 典型岩石和土的Skempton 系数特征 1 1 2 卢应发 ，郑俊杰 ，柴华友 (1. 华中科技大学 土木工程和力学学院，湖北 武汉 430074 ；2. 中国科学院 武汉岩土力学研究所，湖北 武汉 430071) 摘要：在理论分析和试验研究基础上，主要探讨了具有典型代表性的岩石和土(砂岩、粘土、重塑土)在饱和非排水 状态下、在不同围压下和不同加载率下 Skempton 系数的变化规律以及发生这种规律的基本原因。提出了对结构性 较强的孔隙介质，必须加以考虑水的压缩性的基本观点，这种研究对三峡库区岩体和土体的力学特性和坝基及堤 防施工具有重要的指导意义。 关键词：岩石力学；饱和；非排水；Skempton 系数；水的压缩性 中图分类号：TD 313.3 ；TU 411.3 文献标识码：A 文章编号：1000 –6915(2005)11 –1847 –05 CHARACTERISTICS OF SKEMPTON COEFFICIENT OF REPRESENTATIVE ROCK AND SOIL 1 1 2 LU Ying-fa ，ZHENG Jun-jie ，CHAI Hua-you (1. School of Civil Engineering and Mechanics ，Huazhong University of Science and Technology ，Wuhan 430074 ，China； 2. Institute of Rock and Soil Mechanics ，Chinese Academy of Sciences，Wuhan 430071 ，China) Abstract ：The fundamental characteristics of Skempton coefficient have been studied based on the theoretical analyses and laboratory under the undrainage. Some tests have been performed under the different conditions，for instance ，different confining pressures and different loading types. The mechanism of Skempton coefficient change has also been investigated. That the compressibility of water cannot be neglected is proposed for the calculation of civil engineering. It is very important for the research of mechanical properties of rock mass and soil mass in the Three Gorges reservoir ，and in the construction of dam foundation and embankment. Key words ：rock mechanics ；saturation；undrainage ；Skempton coefficient；compressibility of water