CAJ | 학술논문

中小型水库增设深孔泄洪闸是其除险加固过程中提高水库防洪标准的重要工程措施。相比直道水流，深孔泄洪闸闸后弯道出流会出现一些特殊的水力现象，进而后续建筑的消能防冲问题更为复杂。基于实际工程，通过改变闸后弯道底坡来研究弯道水流的横向超高及流速变化，通过不同试验方案来研究水库下游的消能防冲问题。结果表明：调低弯道底坡可以减小弯道内水流超高；在消力池内增设辅助消能工和弯道调坡适当结合可以满足设计条件下对消能防冲的要求。深孔泄洪闸后弯道中部出现最大水流超高值，增大弯道曲率半径可有效降低水流横向超高并缓解弯道作用产生的冲击波。
중소형수고증설심공설홍갑시기제험가고과정중제고수고방홍표준적중요공정조시。상비직도수류，심공설홍갑갑후만도출류회출현일사특수적수력현상，진이후속건축적소능방충문제경위복잡。기우실제공정，통과개변갑후만도저파래연구만도수류적횡향초고급류속변화，통과불동시험방안래연구수고하유적소능방충문제。결과표명：조저만도저파가이감소만도내수류초고；재소력지내증설보조소능공화만도조파괄당결합가이만족설계조건하대소능방충적요구。심공설홍갑후만도중부출현최대수류초고치，증대만도곡솔반경가유효강저수류횡향초고병완해만도작용산생적충격파。
Small and medium sized reservoirs added with deep hole sluice gate is important in the process of consolidation engineering measures,which can improve the flood control standard of reservoir. Compared with straight flow,the problems of bend flow after deep hole sluice gate becomes more complicated,which appears some special hydraulic phenomenon. Based on the actual project,the transverse lateral high and velocity variation of bend flow were studied by changing the bottom slope;and three contrast tests were designed to study the striking problems of energy dissipation and erosion control. The results prove that lowering the bottom slope can reduce the transverse ultra-high of bend flow;with the design condition of adding baffle block and auxiliary energy dissipation work in the stilling basin,the requirements of energy dissipation and erosion control can be met after lowering the bottom slope. The middle bend of deep hole sluice gate appears the maximum high value of flow,increasing the bend radius of curvature can effectively reduce the cross flow ultra high and ease the bend effect generated in the subsequent shock wave.