Reference problem
---------------------

.. _Toc93483749:

Geometry and meshing
~~~~~~~~~~~~~~~~~~~~~~~

.. figure:: images/10000000000004F5000001F672E5642DC8BEC468.png
 :name: fig1-geom-ssnp006
    :width: 60%

    **Geometry and mesh of the studied slope**


.. _RefImage_10000000000004F5000001F672E5642DC8BEC468.png:


We study a slope made up of homogeneous material with a height of 4.5m with
the rate of the slope equal to 1:2. The model is 18m wide and 6.5m high.

The geometry and mesh of the slope are shown in :numref:`fig1-geom-ssnp006`.


.. _Toc93483751:


Material properties
~~~~~~~~~~~~~~~~~~~~~~

Identical to the Plaxis2D test case, the properties of the material are as follows:


* Unit mass of soil: :math:`{\gamma }_{\mathit{sol}}=16\mathit{kN}`
* Ground friction angle: :math:`\varphi =20\mathit{deg}`
* Soil cohesion: :math:`c=5\mathit{kN}/{m}^{2}`

Stability is analyzed with the Mohr-Coulomb failure criterion.

.. _Toc93483752:

Boundary conditions and loads
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Stability under the effect of gravity alone is analyzed.

The following mechanical loads are therefore applied to the model:

* Gravity with :math:`g=\mathrm{9,81}m/{s}^{2}`