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基于TIN的土方量计算,是依靠变形观测点建立三角网,利用地形表面TIN模型和设计表面TIN模型的叠加,求出在两个表面上对应的三角形单元所夹土方量,通过土方量的大小来间接地反映地面总体沉降情况,以便采用相应的预防措施。以土方量作为研究对象,选用泊松曲线模型对所得土方量数据进行拟合,建立预测模型,并进行精度评定。通过研究发现,该方法能较好地反映地面总体整体沉降情况,可以在地面产生不均匀沉降时,探求地面沉降变化的规律性。
The calculation of earthwork based on TIN is based on the deformation of observation points to establish a triangular network, the use of terrain surface TIN model and design surface TIN model superposition, obtained on the two surfaces corresponding to the triangular unit earthwork amount, through the earthwork size To indirectly reflect the overall settlement of the ground in order to adopt the appropriate preventive measures. Taking earthwork as the research object, the Poisson curve model was chosen to fit the earthwork data. The forecasting model was established and the accuracy was evaluated. The results show that this method can reflect the overall settlement of the ground as a whole, and can explore the regularity of the variation of land subsidence when there is uneven settlement on the ground.