湖南皂市水利枢纽泥化夹层工程地质特性

THE ENGINEERING GEOLOGICAL PROPERTIES OF THE CLAYEY INTERCALATION IN ZAOSHI WATER CONSERVANCY PROJECT OF HUNAN

泥化夹层是皂市水利枢纽主要工程地质问题之一,是枢纽大坝安全、边坡与硐室稳定及工程投资的敏感因素之一。结合湖南皂市水利枢纽的具体工程情况,对夹层分类进行探讨,并对坝址泥化夹层物质组成、形态变化及其物理、力学性质、形成机制进行分析研究,提出工程重点部位的泥化夹层的分布特征及其厚度变化状况后的力学特征、力学参数,以指导具体工程部位的岩体稳定性分析和工程设计。

One of main engineering geological problems in Zaoshi water conservancy project is the clayey intercalation, which becomes one of the sensitive factors that influence the safety and investment of the dams, slopes and tunnels. After analyzing the concrete project of Zaoshi in Hunan Province,the authors discuss intercalation classification. They also analyse the physical makeup, metamorphoses, physical and mechanical properties, formation mechanism of clayey intercalation in the dam site. In order to guide rock mass stability analysis and engineering design of the engineering parts, the authors bring forward distribution of clayey intercalation at key parts in the project, and mechanical characteristics and mechanics parameters after intercalation＇ s thickness having varied.