南水北调倒虹吸工程裹头附近河床变形研究

Riverbed Deformation near Revetment Works Crossed by Inverted Siphon of South-to-North Water Transfer Project

对白马河倒虹吸工程河段河床演变分析知,人类活动对近期该河段有重要影响。通过动床模型试验得到了倒虹吸工程轴线附近以及两岸裹头的河床冲刷深度,表明倒虹吸埋置深度是安全可靠的。试验数据分析表明裹头工程根部设置铅丝石笼防护带,对保护工程、减轻边岸冲刷非常重要。借助理论与实测资料分析,对裹头附近局部冲刷发展规律进行了研究,提出了裹头附近局部冲刷发展模式,推求了局部冲刷深度随流量变化的模拟方程。

The human activity has an important affect on the river recently by analyzing fluvial process of the Baimahe River reach crossed by the inverted siphon of South-to-North Water Transfer Project. In order to find the scour depths near the inverted siphon axis and revetment works, the movable bed model was constructed and test results indicated that the buried depth of the inverted siphon is safety. Adopting gabions set in the bottom of the revetment works to protect engineering from erosion is necessary. By the analysis of theory and measured -data, the author studied the local scour process near the revetment works, proposed a mode of local scour process, and gave a modeling equation relating to local scour depth and discharge.