关键词: 坝基扬压力, 现场测试, 渗压系数, 统计模型

Abstract: The uplift pressure in the foundation of power house and of the dam sections at both banks of a hydropower station is high, and the seepage pressure coefficients are larger than the designed control index. By field test on piezometer tubes in foundation, it is found that they are working alright and measured uplift pressure is reliable. The qualitative analysis of the uplift pressure in dam foundation and the quantitative analysis of statistical model show that the uplift pressure is mainly affected by the upstream and downstream water level, and there is no unusual trend in the current change and no possibility of sliding instability either. However, it is still necessary to strengthen the monitoring analysis and site inspection, which provide basis for the operation and management of the project in the later stage.

Key words: dam foundation uplift pressure, field test, seepage pressure coefficient, statistical model