During the operation of concrete dams,the seepage pressure coefficient is usually used to evaluate the magni-tude of the uplift pressure on the dam foundation and further assess the working performance of the seepage control sys-tem.Based on the analysis of the measured data from Shatuo and Guangzhao Hydropower Stations,it is found that using the seepage pressure coefficient as the monitoring indicator cannot truly reflect the working conditions of the dam founda-tion,although simple and intuitive.It is thus recommended that in the structural calculation of dams,the design unit should not only provide simple uplift coefficient values,but also back calculate the uplift pressure control values for each dam monolith based on the calculation conditions and the safety margins to the operation unit.The operation unit should not only focus on the uplift pressure coefficient and the uplift pressure in the daily data analysis,but also analyze their variation process and other monitoring items.
关键词
坝基渗压系数/扬压力/监控指标/抗滑稳定/建基面应力
Key words
seepage pressure coefficient on dam foundation/uplift pressure/monitoring indicator/anti-sliding stabili-ty/foundation surface stress
维普
万方数据