辐射井的抽水降落曲面模型

Curved surface model of the pumping descent for radiation well

辐射井的渗流系复杂的三维流,目前其出水量的确定尚无较准确的理论计算方法,如何确定其抽水的降落曲面是理论计算和工程实践中需要解决的问题。本文根据辐射井抽水试验降落曲线的特点,建立了单层辐射管均匀布设的辐射井抽水降落曲面方程,利用该方程可计算出任一抽水时刻的影响半径及空间任一点的水位高度。最后通过实例验证,表明模型计算结果与实测数据吻合较好,可较真实地反映辐射井抽水时地下水的分布情况。

Seepage flow of radiation well is a complex three-dimensional flow. At present, there is a lack of the accurate method of theoretical calculation for confirming the water output of the whole radiation well. While bow to give the pumping descent curved surface is a main problem to be solved in theoretical calculation and engineering practice. In this paper, the equation of the pumping descent curved surface for single radiant tube with uniformly distribution is firstly constructed. By this equation the influence radius at any pumping time and the height of water level in any point in space can be calculated. Finally, an experiment example is given to validate that the calculated result of the model is coincide to the measured data, and it really reflects the distribution of groundwater around the radiation well in pumping process.