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城区渗流场中地下阻水结构物众多,由于结构物的角点为奇异点,而且结构物的尺寸跟整个城区渗流场的尺寸相比非常小,这导致现有的计算方法难以对城区渗流场进行模拟分析。针对城区渗流场的这些特点,通过引进流体力学的复势、偶极子等理论,采用抽注水井对结构物进行模拟。通过控制井流量的大小,以形成强弱程度不同的阻水效果,而单元尺寸可以以井点间距为尺度,用较少的节点和单元即可对地下结构物进行处理,达到简化计算的目的。抽注水井法是一种简化的模拟算法,它忽略了结构物附近局部区域流场失真的情况,强调在宏观上与真实流场接近。
There are many underground water blocking structures in the seepage field of urban area. Because the corners of the structure are singular points, and the size of the structure is very small compared with the size of the seepage field in the entire urban area, it is difficult for the existing calculation methods to estimate the seepage field Simulation analysis. According to these characteristics of urban seepage field, by introducing the theory of complex potentials and dipoles of hydrodynamics, the pumping wells are used to simulate the structures. By controlling the flow rate of the well, the water blocking effect with different degree of strength is formed, and the unit size can be based on the spacing of well points, and the underground structure can be processed with fewer nodes and units, so as to simplify the calculation . The injection well method is a simplified simulation algorithm that ignores the flow field distortion in the local area near the structure and emphasizes that it is macroscopically close to the real flow field.