灌区洪水入泄对干渠水力特性影响试验研究  

Experimental study on the influence of inflow and discharge of irrigation area on the hydraulic characteristics of trunk canal

作　　者：韩钰亮 HAN Yuliang(Luoyang Water Resources Surveying and Designing Co.Ltd,Luoyang 471000,China)

机构地区：[1]洛阳水利勘测设计有限责任公司,河南洛阳471000

出　　处：《水科学与工程技术》2023年第1期93-96,共4页Water Sciences and Engineering Technology

摘　　要：为研究小浪底南岸灌区工程外洪入泄时对干渠水力特征影响,采用物理模型试验方法开展单、双侧入泄时水力特性分析。双侧入泄下干渠流速高于单侧,且稳定性也较高;当入泄流量愈高,则流速水平愈大,单、双侧入泄方式下干渠平均流速随每梯次入泄量分别增长20.6%、28.6%。同一种流量工况下,两种入泄方式下干渠压强变化特征呈一致,仅存在压强量值与峰、谷压强断面差异。泄流量愈高,压强愈大。泥沙淤积厚度在同种入泄方式下具有变化一致性,单、双侧分别呈递减、先增后减变化,且后者淤积厚度低于前者,两种入泄方式的下游断面淤积厚度均存在较小差幅,可为研究灌区工程输水干渠的防洪与调水管理提供参考。In order to study the influence of the hydraulic characteristics of the main canal during the inflow and discharge of external flood in the south bank irrigation area of Xiaolangdi, the hydraulic characteristics of single and bilateral inflow and discharge were analyzed by physical model test method. The flow velocity of the main channel under the discharge of both sides is higher than that of one side, and the stability is also higher;When the inflow and discharge flow is higher, the flow velocity level is larger. Under the single and bilateral inflow and discharge mode, the average flow velocity of the main channel increases by 20.6% and 28.6% respectively with the inflow and discharge volume of each step. Under the same flow condition, the pressure variation characteristics of the main channel under the two discharge modes are consistent, and there is only the difference between the pressure value and the peak and valley pressure sections. The higher the discharge, the greater the pressure. The sediment deposition thickness has the same change consistency under the same inflow and discharge mode. The single and double sides show the change of decreasing, increasing first and then decreasing respectively, and the deposition thickness of the latter is lower than that of the former. There is a small difference in the deposition thickness of the downstream section of the two inflow and discharge modes. This paper can provide a reference for the study of flood control and water transfer operation of water transmission trunk canal in irrigation area.

关 键 词：小浪底南岸灌区 输水干渠 水力特性 模型试验 

分 类 号：TV135.2[水利工程—水力学及河流动力学]