3. Modeling A

3.1. Characteristics of modeling

This is a D_ PLAN_HM modeling using quadratic HM- XFEM elements.

3.2. Characteristics of the mesh

The block on which the modeling is performed is divided into 49 QUAD8.

3.3. Tested sizes and results

We test the value of the vertical displacements for the nodes \(A\), \(B\) and \(C\) which are located on each of the three interface branches as well as the value of the pressure of the fluid in the interface at these 3 points. These values are summarized in the table below:

Quantities tested	Reference type	Reference value
DY (node A below)	“NON_REGRESSION”	-3.334386E-6 m
DY (node A above)	“NON_REGRESSION”	1.12056089E-4 m
DY (node B below)	“NON_REGRESSION”	-6.262943E-5 m
DY (node B above)	“NON_REGRESSION”	7,36284608E-5 m
DY (node C below)	“NON_REGRESSION”	8.077092E-7 m
DY (node C above)	“NON_REGRESSION”	6.88647E-5 m
PRE_FL1 (node A)	“NON_REGRESSION”	646077 Pa
PRE_FL1 (node B)	“NON_REGRESSION”	579537 Pa
PRE_FL1 (node C)	“NON_REGRESSION”	343080 Pa

3.4. notes

The pore pressure field and the amplified deformation (X1000) were also visualized (Figure). It is verified that the two hydraulic interface branches supplied with fluid propagate to the junction, meet and then feed the third hydraulic interface branch.

Figure 3.4-a : Field of pre**s** amplified pore and deformed (X1000)