构 TIN 法填挖方计算方法研究

为了提高填挖方计算精度，采用构建不规则三角网法，构建设计模型与现实模型。通过一次构TIN进行填挖方计算时，在填挖分界处计算模型复杂，很难用计算机自动化实现。为了解决这些问题，采用二次构TIN法，通过解算矢量三角形，使计算模型简单化，以便于计算机自动化实现。阐述了二次构TIN实现填挖方计算的方法和具体步骤，给出了计算过程中所用到的数学模型。

Study on Constructing TIN for Calculating Cut & Fill Earthwork Volume

To improve the accuracy of cut &; fill earthwork volume calculation，triangulate irregular network（TIN）was adopted to build the design model and real model.　In the earthwork volume calculation by means of primary construction of TIN model，it was difficult to realize the calculation by computer as the model was complex at the division boundary between the cut and fill earthwork.To solve it，secondary TIN construction was conducted to simplify the calculation mode by solving vector triangle calculation so as to facilitate the automatic realization by computer.The method and specific procedure for cut &; fill earthwork volume by twice construction of TIN and the mathematical models used in the calculation are described.