Design Features
There are two types of design features available:
Ditch
Rock Shelf
Ditch
You can activate or deactivate the ditch in the slope calculation, and change the four parameters used to describe the ditch. The ditch will only be calculated for a cut situation.
Activate
The standard value is an active ditch. If the field for Activate is empty the ditch is deactivated and none of the parameters are used in the slope calculation.
Parameters
There are four parameters that describe the ditch: Depth Inner Ditch, Width Bottom of Ditch. Slope Inner Ditch, Slope Bottom of Ditch. These four parameters are shown in the figure above.
Rock Shelf
The rock shelf is a shelf in a cut situation between the rock and soil layer. You can activate or deactivate a rock shelf in the slope calculation, and change the four parameters used to describe the rock shelf. The rock shelf will only be calculated for a cut situation.
Activate
The standard value is an active rock shelf. If the field for Activate is empty the rock shelf is deactivated and none of the parameters are used in the slope calculation.
Parameters
There are two parameters that describe the Rock Shelf, Width of Rock Shelf, and Rock Shelf Widening.
Width of Rock Shelf - This is the horizontal width of the rock shelf. The rock shelf will be made after the rock cut is stopped and before the soil cut slope starts. The standard value is 1.0 meter. You can type in the parameter they want. See the figure under Design Feature.
Rock Shelf Widening - Rock shelf widening is a parameter for widening the rock shelf depending in the height of the rock slope. The standard value is 0.1, but the user can type in the parameter they want. This means that the width of the rock shelf will increase by 0.1m per 1.0m rock slope height. If the rock cut slope is 2.0m high and the rock shelf is 1.0m wide and the rock shelf widening is 0.1 the total width of the rock shelf will be 1.2m wide (1.0m + (0.1 x 2m) = 1.2m). This will automatically be calculated for rock cut slopes of more than 1/1.
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