一种基于三维模型的输电线路塔基设计方法

A Design Method of Tower Foundation Based on Three-dimensional Model for Transmission Line

输电线路塔基设计方案一般是在二维图纸上标绘的,这种方式没有充分考虑地形起伏和周边环境对方案的影响,且工程量计算也存在偏差。三维设计技术在输电线路中的应用,为塔基设计提供了新的手段。文中分析了塔基设计的工作内容,提出了一种基于三维模型的塔基设计方法。首先,对比二、三维设计的优缺点后,确定了通过建立塔位三维虚拟小场景和大场景可更直观地评估和优化塔基设计方案;然后,基于参数化建模的思想,确定了塔基设计包含的模型类型并分析其建模规则;最后,利用塔基三维建模程序及GIS平台,以工程中实际塔位为例建立三维数字化模型,直观评估塔基设计方案的合理性并采取优化措施,其准确性较二维设计有明显提高。

At present,the design of tower foundation for transmission line is plotted on two-dimensional(2D)drawings,but this method does not fully consider the impact of topography and surrounding environment on the scheme,and there also exists deviations in the calculation of quantities.The application of three-dimensional(3D)design technology in transmission line provides a new method for tower foundation design.The work contents of tower foundation design are analyzed,and a new tower foundation design method based on 3D model is proposed.Firstly,after comparing the advantages and disadvantages of 2D and 3D design,it is confirmed that through the establishment of virtual 3D small scene and 3D large scene of tower location,the evaluation and optimization of tower foundation design scheme can be more intuitive.And then based on the idea of parametric modeling,the model types included in tower foundation design are defined and its modeling rules are analyzed.Finally,an actual tower location in the project is chosen to build a 3D digital model by using 3D modeling program of tower foundation and GIS platform.The rationality of tower foundation design scheme is intuitively evaluated.Compared with the 2D design,the proposed method can improve the accuracy obviously.