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《Journal of Water Resources and Architectural Engineering》 2015-03
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A New Analytical Method of Caculating Water Surface Profile of Gradually Varied Steady Flow for Typical Long Tunnels Without Pressure

WANG He-yao;HUANG Chao-xuan;Zhejiang Ninghai County Water Conservancy Bureau;Zhejiang Design Institute of Water Conservancy & Hydro-electric Power;  
The existing analytical method for calculating water surface profile adopts section by section trial calculation which is tedious and inconvenient.Here the gradually varied steady flow depth of the typical long non-pressure tunnels with horseshoe-shaped cross-section and oval cross-section was mathematically deduced,and then its basic differential equation was transformed into an analytical integral function with high-precision based on the numerical analysis theory and dimensionless principle,from which the analytical formula for calculating water surface profile of gradually varied steady flow for typical long non-pressure tunnels was obtained.The water depth can be calculated directly according to this formula and it's more convenient and simple than the recommended method in the specification for design of hydraulic tunnel.According to the analysis of its application in an actual construction project,this method is more convenient and simple,and it can provide more accurate and reliable results that meet the requirements of the construction.
【Fund】: 水利部公益性行业科研专项项目(201401010);; 围垦院软基水闸创新团队科标业项目
【CateGory Index】: TV135
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