Dear Nurmalita Meivanesa

it is possible to download the tutorial for Phase2 from the website Roscience https://www.rocscience.com/downloads/phase2/Phase2_TutorialManual

In the image that you posted the surface constraints do not allow its free movement following the gravity action.

Regards

C.O.

how about this sir Claudio Oggeri , iam confused to define the surface ?

should I use actual ground surface ? or

should I use ground surface elevation ? if I use ground surface elevation, where should I put it?

Hi, the model follows real geometry when a near surface struture is analysed.

G.S.E. is an auxiliary function. I am attaching in brackets the help online by RocScience web site. Consider that some initial adjustments to displacement can be necessary. In addition chek the boundary conditions also at the upper lateral corners of the model.

"The reason the displacements are upward is rebound. The initial stress due to the gravity loading for a particular element is higher than the body force due to the elements above it. This can be because 1) the unit weight you're using for gravity loading is higher than the material unit weight used for body forces and 2) the ground surface elevation is at the top of the slope. If the initial stress is higher than the weight of the material above a certain element it will expand. This is why the surface moves up and is a common phenomenon when modeling surface excavations. Generally, what people do is use the first stage to get the initial condition correct then look at relative displacements between stages. You can do this through the Data->Stage Settings option in Interpret. Also see: Phase2 Developer's Tip: Setting up the Initial Stress State for Surface Models Also see the Gravity Field Stress topic. The Use Actual Ground Surface option can now be used to obtain a much better estimate of the initial stress field under a non-horizontal ground surface. Previously it was only possible to define a single datum elevation from which to measure the vertical stress."

Regards