Advanced geometry made simple using computation design techniques

Abstract

The demand for heightened precision in the development of intricate geometries associated with civil infrastructure necessitates a shift in the approach of civil engineers towards digital techniques. Digital modelling of linear road infrastructure has a long history, with 3D modelling tools like Autodesk Civil3D (and others) being in use for numerous years. This software solution is well-suited for designing string-based, linear infrastructure. Additionally, software such as Autodesk Revit, has become established as valuable supplementary tools for creating bridge models and other elements of civil infrastructure. However, this software package needs more sophisticated modelling techniques to accommodate extreme geometry which does not conform to the normal road geometry design rules. This paper showcases the application of computational design techniques in developing a reinforced concrete underpass tanking slab. The primary function of this tanking slab is to prevent groundwater from inundating a newly constructed railway underpass, part of a level crossing removal project. Micro piles, irregularly placed along the road alignment, are used to anchor the tanking slab, and prevent it from floating when the ground water levels rise. The final geometry of the slab is heavily influenced by the complexity of the road design, the integration of concrete details, and the critical flood level considerations. This paper will illustrate how the Autodesk software suite coupled with visual programming can be leveraged to achieve highly intricate 3D geometries. Furthermore, the paper will shed light on the assumptions and limitations of the techniques used in developing the geometry of the reinforced concrete tanking slab.