Based on the monitoring data of uplift pressure on the dam foundation of HD hydropower station,this article adopts a combination of qualitative and quantitative methods to conduct in-depth analysis of uplift pressure,and formulates monitoring indicators based on confidence interval approach and typical small probability method.The results show that the measured extreme values and annual variation amplitude of the uplift pressure water level at each measuring point are relatively stable,and the uplift pressure water level is within the design range.The curtain anti-seepage effect is good.The stepwise regression statistical model for the uplift pressure of the dam foundation has high accuracy.The uplift pressure of the dam foundation is greatly affected by the upstream water level component,downstream water level component,and time effect component,while it is less affected by the temperature component and rainfall component.The monitoring indicators formulated by the typical small probability method are slightly larger than the confidence interval method and historical maximum values.
关键词
坝基扬压力/置信区间法/典型小概率法/监控指标
Key words
foundation seepage uplift/confidence interval approach/typical small probability method/monitoring indicator
维普
万方数据