TECHNICAL | DATA & DIGITAL
Above, figure 3: Screenshot of Civil 3D with Dynamo plugin
(tunnels, shafts, cut-and-cover structures, and cross
passages) which can be very tedious and time consuming.
OVERVIEW OF CAD AUTOMATION CAD was initially developed with the aim to use computers in a way that could mimic the traditional manual drafting process. The focus has been to use CAD to produce printed 2D drawings on paper as opposed to generating digital models in 3D for design analysis. However, recently there has been a shift in emphasis, with tools like Autodesk Civil 3D and Bentley OpenRoads, which have been developed to also represent model entities like alignments, road corridors, topographic points, surfaces, and pipe networks. These software suites are integrated with packages and
advanced entities to support the Building Information Modelling (BIM) approach for civil engineering infrastructure projects. As highlighted by Kontothanasis et al (2019), one
of the key changes that BIM brings to infrastructure projects is interoperability, that is the integrated model which combines all desired disciplines, design- construction stages and input from all parties in a Common Data Environment (CDE). To facilitate this kind of integration and CDE, Autodesk have provided a plugin known as Dynamo within its Civil 3D software, enabling the use of visual programming to pull-in data from other software/design tools and create workflows to automate the design process. Figure 3 shows a screenshot of Civil 3D with the Dynamo plugin on the top/right corner.
Inputs
Alignment and vertical profile
Ground Surface Right, figure 4:
Flowchart of settlement analysis procedure showing how different tools were linked
Building outlines (polygons)
Utilities (alignments or GIS output file)
Excel Input Parameters
Dynamo Graphs (bring together inputs from different sources (Civil 3D, Excel))
Python / C# (calculation of settlements and building damage)
Convert to contours using API
AutoDesk Civil 3D Dynamo
Output Settlement Contours
28 | December 2023
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