> For the complete documentation index, see [llms.txt](https://docs.openbrim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openbrim.org/templates/cable-stayed-bridge-workflow/loading-csb/loads-csb/earth-pressure-csb/abutment-earth-pressure-csb.md).

# Abutment Earth Pressure \[CSB]

The Abutment Earth Pressure workflow item is used to apply horizontal earth pressure loads on abutment walls. It supports both active earth pressure and live load surcharge loading conditions.

## General

**Abutment:** Select the abutment on which the earth pressure will be applied.

**Stage:** Select the construction stage at which the earth pressure load is applied.

**Load Type \[Earth Pressure/Live Load Surcharge]:** Specify the type of earth pressure loading. "Earth Pressure" applies a linearly varying lateral pressure based on the soil's unit weight and the active pressure coefficient. "Live Load Surcharge" applies a uniform lateral pressure over the abutment wall height.

**Active Lateral Earth Pressure Coefficient (Ka):** The active lateral earth pressure coefficient used to calculate the horizontal pressure from the backfill soil.

**Backfill Soil Unit Weight:** The unit weight of the backfill soil behind the abutment.

**Heel Side Width:** The width of the heel side of the abutment footing. This parameter is only applicable when the Load Type is set to "Live Load Surcharge".


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