摘要
垫层料对面板堆石坝的整体渗流有着重要的控制作用,故对其原位渗透检测显得特别重要。现行检测方法存在有检测周期长,试验操作复杂等缺点,文中采用优化的试坑渗水法,通过降低内环特定水位,计算出渗透系数的近似值,方法简单易行。检测数据采用格拉布斯准则进行异常值剔除,并结合试验结果给出了不确定度表示。新方法满足了垫层料填筑过程中的检测时效性和质量控制要求,便于及时处理缺陷,保障工程质量安全。
The bedding material have a great control on the overall infiltration in the face rockfill dam. Therefore,in-situ permeability monitoring is very important. The current detection method has disadvantages such as long detection period and complex test operation. In this paper,the optimized pit seepage water method was adopted,which by means of lowering the specific water level in the inner ring to calculates the approximative value of permeability coefficient. The method is simple and easy to operated. Grubbs criterion was adopted to eliminate the abnormal values. Based on the experiment results,the expression of uncertainty was also presented. The new method can meet the requirement of time limitation and quality control in construction process of filling bedding material,by which the defects can be found and treated in time and project quality and safety can be ensured.
出处
《山西水利科技》
2019年第1期55-58,共4页
Shanxi Hydrotechnics
关键词
原位渗透
试坑渗水法
渗透系数
in-situ permeability
pit seepage method
the permeability coefficient
