Data Sources for Ground Investigations (Ground Layers)

Ground Investigations (Ground Layers)

In Gemini Terrain, we can handle multiple ground layers when designing roads and excavation pits. The following layers (in addition to tunnel) can be used in various combinations:

Figure: A = Vegetation, B = Topsoil, C = Mass replacement, D = Soil, E = Rock

Initially, we have no information about the soil types in the ground. In a planning phase, we must therefore perform ground investigations to determine the layers in the ground.

From fully analyzed point and line data from ground investigations, we can create models for the ground layers. The accuracy of these layers depends on the number of soil borings done in the relevant area.

Workflow for Establishing a Ground Model

To establish a ground model, we must:

1. Have information about x, y, and depth for all boreholes
2. Import this data into an application layer
3. Triangulate the data
4. Define the layer as a relative layer

Note

In many cases, we agree on a fixed offset for the ground layers. This can be solved simply by entering the offset value.

See the dialog help for Layers for a more detailed description of relative layers.

Tip

The advantage of using relative layers is that a change in the reference layer will automatically be reflected in the relative layer.

Example Collection

See also the example collection for implementation:

Exercise 1.4 - Establish gmi layer with borehole data