低水头多孔闸调度水力冲淤模型试验研究

双台子河闸位于辽河下游感潮河段,枢纽工程中的新建浅孔闸为低水头高淹没度的拦潮闸。由于受到海潮的影响,在涨潮时,海水携带大量的泥沙并沉积在闸下,导致拦潮闸下游处于淤积的状态,下游河床由于淤沙的沉积而不断抬升。为有效解决河道抬升及淤沙问题,在水工模型试验的基础上,通过多种闸门调度运行方案并结合定床和动床调度试验,测量和分析了不同闸门开启方式下的流速、流态等水力要素及动床冲刷情况,得到科学合理的闸门调度方案,即隔孔开启,可有效改善双台子河闸闸下淤沙问题。

Test Research on Scheduling Washing Silt of Low-Head Porous Gate

Shuangtaizi sluice is located in the downstream tidal reach of Liaohe River. The new constructing flood control sluice in this project is a low-head, high-submergence-degree tidal barrage. Owing to the impact of tide, seawater will carry lots of sediments which deposit under the gate when the tide is rising, which results in a depositing state in the downstream of the tide lock and a continuous rise of the riverbed. To solve the problem of river channel uplifting and silting effectively, based on the hydraulic model test, scientific and rational gate scheduling schemes can be acquired through researching various gate operation schemes and combining immovable and movable bed trials results, as well as measuring and analyzing the flow velocity, the flow state and the movable-bed erosion. Thus, it will improve the silting problem in Shuangtaizi sluice effectively.