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设置辐射井排渗系统是降低粉煤灰坝坝体浸润线的有效手段,已经在多个工程中应用,效果显著。决定辐射井的排渗效果的关键在于辐射管的布设,特别是在已成工程中设置辐射井时,由于灰面以下地形复杂,辐射管长度、角度均受制于地层情况和库底地形条件,传统的平面设计方法很难充分考虑这些因素,常常会导致辐射管布设不合理、排渗效果不理想。基于三维立体建模技术和布尔运算的灰坝辐射井排渗系统三维立体设计方法能有效地避免以上问题,达到精确设计并指导施工的目的,并可以与渗流仿真分析无缝结合,是进行辐射井设计和验证的先进而有效的手段。结合灰坝辐射井排渗工程实例,提出了辐射井三维立体设计方法,并采用数值仿真分析验证了设计的合理性,证明三维立体设计方法的可行性。
Setting up the radiation well drainage system is an effective way to reduce the wetting line of the fly ash dam. It has been applied in many projects and the effect is obvious. The key to determine the effect of radiation wells is the layout of radiant tubes. In particular, when the wells are installed in a well, the length and the angle of the radiant tubes are subject to the formation conditions and the topographic features of the bottom due to the complex topography below the gray surface. The traditional graphic design method is difficult to fully consider these factors, often lead to unreasonable radiant tube layout, drainage effect is not satisfactory. Based on the three-dimensional modeling technology and the Boolean operation, the three-dimensional design method of the ash dam radiation well drainage system can effectively avoid the above problems, achieve the purpose of accurate design and guidance of construction and can be seamlessly combined with the simulation of seepage flow, Well-designed and validated well-established and effective means. Combined with the example of the draining seepage engineering of the radiation dam in the gray dam, a three-dimensional design method of the radial well was proposed. The feasibility of the three-dimensional design method was proved by numerical simulation analysis.