融合三维地质体的Revit精细化基坑建模

Revit fine foundation pit modeling fusing three-dimensional geological body

摘要:

首先通过正交试验优选出Revit基坑支护结构模型无缝连接Civil真三维地质体模型的融合方案，解决了当前Revit难以直接创建真三维地质体模型的难题；在此方案基础上，探索并总结出一系列诸如桩、锚、面层等常用基坑支护结构的精细化建模方法；最后结合实际工程案例，对基坑支护综合模型在辅助设计方面做了BIM理念下的初步应用研究：周边环境条件三维具现与漫游展示，支护结构与周边已建地下预制桩碰撞检查，工程量精确统计，不同支护结构空间交界节点设计优化，地下水位面、软弱风化基岩面及淤泥层三维空间展布状态剖切观察，导出可用于指导精确测量放线的二维CAD支护桩位平面图等。

关键词:真三维地质体;精细化;基坑建模;支护设计;BIM;Civil 3D;Revit

Abstract:

Firstly, through orthogonal experiment, this paper optimizes the fusion scheme for seamless connection of the Revit model for the foundation pit supporting structure and the Civil real three-dimensional geological model; thus, solving the difficulty for Revit to directly create the real three-dimensional geological model at present. On the basis of this scheme, a series of fine modeling methods for common supporting structures of foundation pits such as pile, anchor, surface and layer are explored and summarized. Finally, in the context of actual project cases, the preliminary application research of the comprehensive model for supporting structures of foundation pits under the BIM concept is carried out in the field of computer aided design: three-dimensional concretization and roaming display, collision check of supporting structures and the surrounding underground precast piles, accurate calculation of work quantity, design optimization of space intersection joints of different supporting structures, sectional observation of the three-dimensional spatial attitudes of the groundwater table, the poor weathered bedrock surface and the silt layer, the two-dimensional CAD supporting pile position plan which can be used to guide accurate measurement and setting-out, etc.

Key words:real three-dimensional geological model; refinement; foundation pit modeling; support design; BIM; Civil 3D; Revit