土石坝高聚物防渗墙离心机振动台模型试验研究∗

为研究高聚物防渗墙的抗震性能,开展了土石坝高聚物防渗墙和混凝土防渗墙离心机振动台模型试验研究。在调幅分别为0.2g和0.4g El-Centro地震波输入条件下,通过对墙体动应力、超孔隙水压力、动土压力、坝体加速度、坝顶沉降等数据的采集分析以及试验后的开挖验证,结果发现:强震下高聚物防渗墙的动应力远小于混凝土防渗墙,与坝体加速度响应较为一致,但对动力的传递作用使得下游坝坡承受较大的水平土压力作用。研究表明高聚物防渗墙具有较好的变形协调性及良好的抗震性能,但选用高聚物防渗墙的土石坝应注意下游坝坡的加固处理。

Design of risk rectification experience think tank for the operation mode of Ningxia power grid

In order to effectively improve the efficiency of maintenance rectification and the accuracy and comprehensiveness of risk point search of calculation personnel, by sorting out the key information of monthly and annual operation mode risk rectification in recent years of Ningxia power grid,the logical relationship of maintenance rectification data was clarified, and the data structure of power grid operation mode risk rectification experience think tank was constructed. Based on QT development software, an experience think tank for power grid operation mode risk rectification was developed, which comprehensively contained the information of maintenance rectification type, operation risk, control decision, monitoring section name, monitoring section limit under normal and maintenance mode of power grid. It has powerful information retrieval function, friendly manmachine interface and certain statistical function. The application shows that the use of operation mode risk rectification experience think tank for Ningxia power grid improves the convenience and efficiency of longterm maintenance and use of risk database, which is of great significance to ensure the safe and stable operation of power grid maintenance mode.