基于BIM技术的隧道工程自动算量方法

针对当前使用Revit软件建立隧道掘进模型效率低、生成算量复杂等问题，在软件现有功能基础上创新建模方法提高了建模速度；结合参数化族实现模型的可重复使用；使用明细表功能实现了自动算量，提升了BIM技术在隧道施工过程中的应用能力。利用结构梁族断面可参数化和绘制简便的特点，创建参数化梁族。在Revit软件中可利用断面参数化梁族通过拾取轴线命令快速绘制隧道掘进模型。利用面墙和面屋顶绘制多层喷射混凝土模型，为4D施工模拟提供了方便。通过墙与拱顶明细表可快速得到喷射混凝土方量。利用幕墙嵌板族绘制单根锚杆模型从而实现了锚杆模型的参数化，提高了建模效率。利用钢筋网片命令解决了侧墙钢筋网绘制困难的问题，通过改变钢筋网片参数可实现对钢筋网尺寸的控制，方便得到工程算量并提高了模型的可控性。

BIM-based Automatic Calculation Method of Tunnel Engineering

In view of the current problems of low efficiency and complex calculation existing in establishing tunnel excavation model by using Revit software, this paper innovates the modeling method on the basis of existing functions of the software, improving the modeling speed. The parameterized component family contributes to the reusable model, and the detailed list function contributes to the automatic operand, both resulting in better application of BIM technology in the tunnel excavation and construction. In that the structural beam possesses parametric cross sections, and can be drawn easily, it is used to create parametric beam family. The section parametric beam family is then applied in Revit to rapidly draw the tunnel excavation model by picking up axis command. Both the surface wall and surface roof families are applied to create models for multi-layer sprayed concrete, which provides convenience for the 4D construction simulation. The detailed lists of wall and vault are used for instant calculation of the concrete quantity for spray. The curtain panel family is used for the modeling of single anchor, making the model parameterized, which improves the modeling efficiency. The command of reinforcement mesh is applied to solve the difficulties in drawing reinforcement mesh of side wall. By changing the parameters of steel mesh, the size of steel mesh can be controlled, leading to easy obtaining the calculation quantity and better controllability of the model.