Study On Control Section Design And Storage-routing Method Of The Weir-gateway Combination Of The Spillway

Spillway project is an important part of the earth-rock dam hub, and in the spillway project the control section is the important part of the designing. On the basis of the control section of the spillway using gateway control, this paper proposes the use of the weir-gateway combination in the control section, and researches the control section design and storage-routing method of the weir-gateway combination of the spillway detailed. Here the weir-gateway combination is different from traditional gateway built on the weir, but it has gateway and weir in the control section of the spillway. Weir-gateway combination which relatives to the other schemes has the advantages of the pure gateway and pure weir, and is more economical and reasonable, in large and medium-sized reservoirs spillway project has a good application prospect. The main contents and conclusions of the paper are as follows:(1)The layout of the control section for weir-gateway combination has been analyzed in detail. This paper mainly analyses the "side type" and "symmetric-al type" two forms' characteristics and suitable conditions of the weir-gateway combination, geological, in the direction of flow and other natural conditions, weir type(WES weir, hard dine practical weir, maze weir)suitable for weir-gateway combination characteristics, researches a reasonable selection method of layout of the weir-gateway combination, proposes layout principle, from discharge capacity, topography condition, economic and the other aspects, and the weir type existing suitable for weir-gateway combination compared, proposes the selection method of the weir type.(2)The discharge characteristics of weir-gateway combination have been analyzed, basing on the existing reservoir storage-routing methods and storage-routing theory and combining with the discharge characteristics of the weir and the gateway, this paper proposes storage-routing principles and storage-routing methods of the weir-gateway combination. Using the regression software, the existing flow coefficients of the weir and the gateway have been analyzed, this paper puts forward the method to determine the flow coefficient.(3)From the benefits and costs analysis, combined with the engineering practice -- the economic scheme comparison of the spillway control section Yangzhuang Reservoir, puts forward the economic comparison method of the spillway control section for the weir-gateway combination and the pure gateway, pure weir.