运东船闸下游引航道通航条件改善措施

Improvement measures of navigation flow in Yundong ship lock' s lower approach channel

运东船闸位于江苏省干线航道网通扬线起点,规划将老船闸拆除,并在原址进行船闸扩容工程建设。通过1∶40物理模型研究工程或非工程修复措施对改善通航水流条件的效果。结果显示:延长泄水阀门开启时间可降低泄流过程中的流量峰值,使得引航道内最大水面比降、最大流速、水面波动幅度有所减小;植物护坡能够有效削减泄水波、船行波能量;空箱结构护岸可以有效降低水流对岸壁的冲击力、削减水波动能,保护航道护岸及人字门;空箱护岸长度越长,水流改善效果越明显。

Yundong ship lock is located at the beginning point of Tongyang navigation channel which is one of main channels in Jiangsu province. The old lock is planned to be replaced by a greater new one. A physical model of 1：40 scale ratio is applied to study the effects of some management measures and engineering ones on water wave and flow. The results show that long valve opening time could lower the peak value of flow rate, therefore the water surface slope, water wave and water flow could be reduced. Plants revetment could cut down long wave energy effectively. Hollow caisson structure has positive effect on reducing impact force against the channel walls and the miter gate, and the longer of hollow caisson structure revetment is, the better effects it produces.