摘要
通过动床模型试验 ,讨论了不同水、沙条件下利用天然石块砌成的丁坝、潜坝以及河床局部展宽等河床防冲工程对河床形态及水、沙运动特性的影响 ,分析了不同防冲工程对减轻河床冲刷的作用 .试验是在长2 4m、宽 0 .7m的梯形动床水槽中进行的 .试验中利用先进的量测设备测量了水位、流速、推移质输沙率以及河床形态的变化 .试验结果表明 ,河床建筑物加大了河床阻力 ,与无建筑物时相比 ,河道水深增大 ,输沙能力有所降低 ,河床形态及水流结构更加复杂 ;并表明 ,不同工程措施对河床的防冲效果不同 .
By means of laboratory experiment the paper discusses the influences of different nature-friendly river training measures on river bed morphology, bed load transport as well as their effects on river bed stabilization. The experiments were conducted in a 24 m long, trapezoidal flume with movable bed. The hydraulic and sediment transport parameters such as water level, flow velocity distribution, bed load transport and bed morphology were measured using modern measuring instruments. The results show that with the nature-friendly river training measures the water depth increased and the bed load transport capacity decreased compared with that of the river without these measures. The bed morphology was diversified. The experimental results indicate that various measures had different effects on restraining bed erosion.
出处
《华北水利水电学院学报》
2001年第3期79-83,共5页
North China Institute of Water Conservancy and Hydroelectric Power
关键词
模型试验
丁坝
潜坝
推移质输沙
河床形态
laboratory experiment
nature-friendly river training measures
bed load transport
bed morphology
