向家坝水电站截流冲坑动态监测技术与实践

Dynamic monitoring technology and practice for river closure scour pit of Xiangjiaba Hydropower Station

向家坝水电站在截流施工前曾专门做过截流水工模型试验。为了验证模型试验成果并为以后类似截流工程积累宝贵资料,采用高精度的RTK GPS双星接收机、数字测深仪、绘图仪、计算机及数据链设备,对向家坝水电站在截流期龙口高速水流给下游河床造成的冲刷进行了实时监测。其成果为截流施工组织、调度决策提供了科学依据,保证了截流施工的顺利进行。

Before the river closure of Xiangjiaba Hydropower Station,the hydraulic model test of river closure was carried out.In order to verify the test results and accumulate valuable data for similar closure construction,the high-precision RTK GPS Bi-satellite Receiver,digital depthometer,plotter,computer and data link equipment were adopted to perform the real-time monitoring of scour in downstream river bed caused by high-velocity flow at closure gap during the period of river closure.The results provide a scientific basis for the construction organization,dispatching and decision-making of river closure and ensure the success of river closure.