Study on the Humidity and Dry Shrinkage Stress of Rockfill Dam Panel for Kaihua Reservoir
In order to study the humidity and dry shrinkage stress of the panel under different humidity conditions during the construction period of a rockfill dam,a finite element model was established under different humidity conditions with the Kaihua Reservoir panel rockfill dam as the research object.The time-variation process of the humidity and dry shrinkage stress of the panel were compared and analyzed under normal humidity conditions and sudden drop of humidity conditions.The research results indicate that without applying moisturizing measures,under two working conditions the humidity change at the central point of the panel surface is basically consistent with the external humidity change,while the internal points of the panel show a gradually decreasing trend.When applying moisturizing measures,under two working conditions the humidity at the central point of the panel surface first decreases and then stabilizes,while the humidity at the internal points of the panel slightly increases compared to not applying moisturizing measures.When no moisturizing measures are applied,the dry shrinkage stress at the central point of the panel surface shows a trend of rapid increase followed by a gradual stable trend,and a sudden decrease in humidity will lead to a sudden increase in dry shrinkage stress;when moisturizing measures are applied,the fluctuation amplitude of dry shrinkage stress at the central point of the panel surface decreases and the sudden increase phenomenon of dry shrinkage stress disappears.
rockfill dampanelsudden drop of humiditydry shrinkage stress
万方数据
维普
