Subsurface

Invisible

By definition the subsurface is opaque. Whether you have to look 2 meters, 200 meters or 2 kilometers deep for a project, you simply cannot see what is below the surface. For this purpose, ground investigations are carried out (CPT's, SPT's or borings) and in some cases also geophysical surveys (GPR, EM, seismics). Often a walk-over survey of the project area is useful to get an idea of ​​the general geological, geohydrological and physical conditions.

Geology is the basis

We use geology as a basis for interpreting ground investigations. Without knowledge of geology it is very difficult to connect the different data. The best way is to start with a conceptual 3D model of the subsurface. This model can subsequently be refined with the ground investigation data. In the Netherlands much basic information is publicly available, which can be found in the Dinoloket. In other countries the available information is often only in the form of geological maps.

From 3D model to design

A conceptual model can be converted into a 3D computer model. This is usually done with specialized 3D GIS software, such as Rockworks or GiNT. A 3D computer model of the subsurface can be used in design packages such as Civil 3D, Autocad and inserted in a BIM. This allows the information of the subsurface to be integrated into the design process.