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A platform for research: civil engineering, architecture and urbanism
Forward and reverse scouring dredging method for diversion canal of hydropower station and diversion canal structure
The invention provides a forward and reverse scouring dredging method for a diversion canal of a hydropower station and a diversion canal structure. The method comprises the steps that S10, the gradation of deposited silt in the diversion canal is determined; S20, the representative particle size and the corresponding starting flow velocity of the deposited silt are determined according to a gradation curve of the deposited silt; S30, the starting flow needed for removing the deposited silt through water flow scouring is determined according to the Manning formula; S40, the target opening degree of a gate of the diversion canal is determined according to the starting flow and a flow discharge capacity curve of the diversion canal; and S50, according to the target opening degree, a diversion gate at the head of the diversion canal is opened firstly for forward scouring, and then a power generation diversion tunnel gate at the tail of the diversion canal is opened for reverse scouring. Based on the technical scheme, forward and reverse scouring dredging is achieved through hydraulic power, a large amount of deposited silt is removed with low cost, and the power generation loss and the dredging cost caused by silt deposition of the hydropower station are reduced.
本发明提供了一种水电站引水渠正反向冲刷清淤方法及引水渠结构，该方法包括：步骤S10、确定引水渠中的淤积泥沙的级配；步骤S20、根据所述淤积泥沙的级配曲线确定所述淤积泥沙的代表粒径及对应的起动流速；步骤S30、根据曼宁公式，确定通过水流冲刷来清除所述淤积泥沙所需的起动流量；步骤S40、根据所述起动流量与所述引水渠的泄流能力曲线，确定所述引水渠闸门的目标开度；步骤S50、按照所述目标开度，先打开所述引水渠渠首的引水闸门进行正向冲刷，然后打开所述引水渠渠尾的发电引水洞闸门进行反向冲刷。基于本发明的技术方案，采用水力正反向冲刷清淤，用较小的代价清除大量的淤积泥沙，降低了水电站因泥沙淤积造成的发电损失与清淤成本。
Forward and reverse scouring dredging method for diversion canal of hydropower station and diversion canal structure
The invention provides a forward and reverse scouring dredging method for a diversion canal of a hydropower station and a diversion canal structure. The method comprises the steps that S10, the gradation of deposited silt in the diversion canal is determined; S20, the representative particle size and the corresponding starting flow velocity of the deposited silt are determined according to a gradation curve of the deposited silt; S30, the starting flow needed for removing the deposited silt through water flow scouring is determined according to the Manning formula; S40, the target opening degree of a gate of the diversion canal is determined according to the starting flow and a flow discharge capacity curve of the diversion canal; and S50, according to the target opening degree, a diversion gate at the head of the diversion canal is opened firstly for forward scouring, and then a power generation diversion tunnel gate at the tail of the diversion canal is opened for reverse scouring. Based on the technical scheme, forward and reverse scouring dredging is achieved through hydraulic power, a large amount of deposited silt is removed with low cost, and the power generation loss and the dredging cost caused by silt deposition of the hydropower station are reduced.
本发明提供了一种水电站引水渠正反向冲刷清淤方法及引水渠结构，该方法包括：步骤S10、确定引水渠中的淤积泥沙的级配；步骤S20、根据所述淤积泥沙的级配曲线确定所述淤积泥沙的代表粒径及对应的起动流速；步骤S30、根据曼宁公式，确定通过水流冲刷来清除所述淤积泥沙所需的起动流量；步骤S40、根据所述起动流量与所述引水渠的泄流能力曲线，确定所述引水渠闸门的目标开度；步骤S50、按照所述目标开度，先打开所述引水渠渠首的引水闸门进行正向冲刷，然后打开所述引水渠渠尾的发电引水洞闸门进行反向冲刷。基于本发明的技术方案，采用水力正反向冲刷清淤，用较小的代价清除大量的淤积泥沙，降低了水电站因泥沙淤积造成的发电损失与清淤成本。
Forward and reverse scouring dredging method for diversion canal of hydropower station and diversion canal structure
一种水电站引水渠正反向冲刷清淤方法及引水渠结构
SHENG YUMING (author) / WANG DANGWEI (author) / ZHANG GUOLAI (author) / DENG ANJUN (author) / YU XIANGRONG (author) / GUO QINGCHAO (author) / BAI CUNZHONG (author) / SHI HONGLING (author) / YAN HONGWEI (author) / JI ZUWEN (author)
2021-04-20
Patent
Electronic Resource
Chinese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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