淤地坝坝体体积的计算

对于已确定的淤地坝坝址,坝体的纵断面（即沟道横断面）是一定的。根据实测的沟造横断面,以沟底最低点为坐标原点,沟道一侧的岸壁曲线可用幂函数形式表示之。利用这种幂函数关系,对于坝坡均一的坝体．在设定坝顶宽、坝高和上下游边坡之后,作者推导出沟道一侧坝体体积的计算公式;沟道两侧的坝体体积即为坝体总体积。对于非均一坝坡、设有马道的坝和坝体加高的体积,可将坝体横断面分割为由几个均一坝坡组成的坝体断面,分别计算其体积。这种计算方法的精度,取决于坝址横断面岸壁曲线回归方程与实际岸壁的符合程度。

Calculation of Volume of Dam Body of a Silt-arrester

To the dam body with even dam slope,after giving a top width,height and gradients in upper and lower reaches of the dam, the author induces a formula for calculating volume of one side of the dam body;the total valume is the sum of volumes of two sides.To the dam bodies with uneven dam slope,n horse road" or a hightened part,the cross section of the dam body can be divided into several parts with even dam slope,then each volume is calculated separately,theacuracy of this method depands upon the accordance of regression equation curve of cross section in dam address to actual bank wall.