论文部分内容阅读
一、前言岩基上修闸建坝一般采用排渗设备来降低渗透扬压力。但基岩有泥化夹层时,须考虑采用排渗设备后,渗流坡降或渗流速度增大,是否会引起泥化夹层渗透变形;以及渗透水中的物质在孔隙中的沉聚,是否会引起排渗设备效能降低。数年前为解决葛洲坝工程的基础排渗问题,我们进行了一系列试验研究工作。结果表明:葛洲坝二江地基泥化夹层的临界渗透破坏坡降为4～10。在葛洲坝特定的工程地质和水文地质条件下,排水孔灌淤的过程,是比较缓慢的。
I. Introduction Preventative dam construction on dam foundation generally uses drainage equipment to reduce the infiltration pressure. However, when the bedrock has a muddy intercalation, it is necessary to consider whether the infiltration or descending of the seepage flow or the seepage velocity will increase if the infiltration of the muddy intercalation layer is caused; and whether the sedimentation of the infiltrating water in the pore will cause Drainage equipment to reduce efficiency. A few years ago to solve the Gezhouba dam foundation drainage problems, we conducted a series of experimental research. The results show that the critical infiltration destructive slope of mudstone interlayer of Gezhouba two-river foundation is 4 ~ 10. In Gezhouba specific engineering geology and hydrogeological conditions, drainage ditching process is relatively slow.