基于Revit二次开发的机电工程算量研究

机电安装工程具有专业众多，构件类型多样和几何关系复杂等特点，且不同类型的构件有不同的计算规则，一些专用计量软件应用时会有不同程度的限制，所以其工程量的准确计算一直是行业中备受关注的问题。为此本文对比了Revit与我国《通用安装工程工程量计算规范》(GB50856-2013)中计算规则的异同，采用Revit插件开发的方式，利用C# 计算机程序语言重新编制计算规则，开发出的插件解决了一些异型连接件处构件工程量不准确问题，实现了工程量按照规范导出，并将编辑好的含有清单属性的映射表与构件一一匹配，最后汇总导出清单工程量表与构件明细表。通过某实际工程应用将导出的工程量与市面上现有机电算量插件计算结果对比，精确度基本满足要求，实现了三维模型下的快速算量，为机电安装工程计量计价提高效率提供了新思路。

Research of Mechanical and Electrical Engineering Quantity Calculation Based on Revit Secondary Development

MEP engineering has the characteristics of numerous specialties, diverse types of components and complex geometric relations, etc. And different types of components have different calculation rules, and some dedicated metering software has different degrees of restrictions in application, so the accurate calculation of the mechanical and electrical installation engineering quantity has always been the concern in the industry. Therefore, this article compares the similarities and differences between Revit software and the calculation rules in my country's Standard Method of Measurement for General Building Services Works (GB50856-2013). Adopting Revit plug-in development, the article reformulates the calculation rules by using C# computer programming language. The developed plug-in solves the problem of inaccurate quantities of components at some special-shaped fittings, and the interface is simple to operate. The quantities are exported in accordance with the specifications. Meanwhile the edited mapping table is matched with the bill attributes to the components one by one. Finally, the table of component detail and bill of quantities is summarized and exported. Through a practical engineering application, the engineering quantity derived is compared with the calculation results of the existing e-mechanical and electrical calculation plug-in in the market. The accuracy basically meets the requirements, and the rapid calculation under the 3D model is realized, which provides a new idea for improving the efficiency of the measurement and valuation of mechanical and electrical installation engineering.