Experimental and theoretical study of skew bridge backwater

For lack of the theoretical calculation method at present,the skew bridge backwater is simulated in adopting circle pier and embank uncompressing river through hydraulic models.With the change of skew angle,the change of backwater is analysis.The model experiment indicates the immanence law of the change of the height of backwater around the skew bridge.The calculation formula for the correct coefficient of the skew bridge backwater height is given through the regress analysis.Considering interaction of piers,the calculation formula for skew bridge backwater height is deduced based on the flow character of the skew bridge and theory of trail flow.