规划总图设计软件GPCAD是基于AUTOCAD软件开发的，用于城市总体规划、控制性详细规划，主要功能有地形处理、地形分析、土石方量计算等。GPCAD软件采用方格网法进行土石方量计算，本文介绍了规划总图设计软件GPCAD计算土石方的基本原理，介绍了方格网划分、零点位置计算和工程量计算公式。矿山地质环境问题主要包括地形地貌破坏、土地资源占压和生态破坏等，矿山开采过程中形成的大量废弃土石方是造成上述问题的根源。因此，矿山地质环境治理工程项目设计、施工通常涉及到大面积的地形整治工程和大规模土石方量的计算，本文结合矿山地质环境治理工程设计实例，通过计算范围确定、方格网布设、自然标高采集、设计标高设定，介绍了各步骤的操作方法，运用GPCAD进行大规模土石方量计算，计算得出区块土石方挖、填方量和净方量。%GPCAD, a general layout design software, is developed on AUTOCAD software for general plan of city and control detailed planning .The main function contains terrain processing, terrain analysis, earthwork calculation etc. GPCAD software calculates the earthwork by using the method of grid net. The thesis summarizes the principle of earthwork calculation with GPCAD software and introduces the steps of grid division, zero position calculation and engineering quantity calculation. Mine geological environment problems mainly include topography, destruction of land resources and ecological damage inlfuence etc. A large number of wastes in the process of mining are the root cause of the problem. So the engineering of design and construction usually involves the calculation of large area terrain remediation projects and large-scale earthwork calculation. Combining the example of the mine geological environment project design, by means of ascertaining calculation scope, setting grid net, collecting natural elevation, setting design elevation, the amount of large-scale earthwork, the earthwork excavation, ifll volume and the net weight are calculated by the GPCAD software.
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