The load applied will be equal in magnitude and opposite in direction to the actual stress on the boundary (field stress + stress redistribution due to excavation).

Note: it is recommended that Induced Stress Loads be used as opposed to Field Stress Vector Loads (legacy feature from RS2 9.0).

See the Tunnel Lining Design tutorial for an example of how to implement the use of an Induced Stress Load (Note: previous versions of this tutorial used a Field Stress Vector Load- the tutorial has been altered to reflect the recommended Induced Stress Load function in RS2 2019).