基于虚拟三维建模的土方计算方法

Earthwork Calculation Method Based on Virtual Three-dimensional Model

为了解决包含了斜坡、弧度在内的基准面土方计算,提出了基于设计面建立虚拟三维模型进行土方计算的新方法,在采用设计图纸的图形和标高的基础上,通过南方CASS构建基于设计面的虚拟三维模型,以更直观、精准的模拟设计面元,并利用四个以上同名点与实地模型(Digital Terrain Model, DTM)嵌套,以提高模型计算精度。通过实例测量计算,对该方法的可行性进行研究,并对计算结果的精度与传统方法进行了对比。

In order to solve the earthwork calculation of datum surface including slope and radians, this paper proposes a new method for earthwork calculation based on design surface to establish virtual three-dimensional model. Based on the graphics and elevation of design drawings, it is constructed by Southern CASS. Based on the virtual 3 D model of the design surface, the panel is designed with more intuitive and accurate simulation, and more than four points with the same name and the Digital Terrain Model( DTM) are used to improve the calculation accuracy of the model. In this paper, the feasibility of the method is studied by the example measurement calculation, and the accuracy of the calculation results is compared with the traditional method.