$1\mathrm{.}2$ Exercise $2$

There is a project for the construction of an embankment for a railway platform. The soil area is

made up of an initial $5$ meters of gravel resting on $10$ meters of dense sands that are in turn sitting

on a solid rocky substrate of unknown thickness. $5$ meters below the gravel base, there are two

already built large diameter pipes $(3$ meters$),$ with a $7$ meters distance between the centers of the

pipe sections, and made of high$-$resistance steel, with a thickness of $50mm.$

The embankment's axis will meet the middle point between the pipes. The embankment itself will

be $8$ meters high, with $2-$meter$-$high layers.

As a geotechnical engineer, you have been tasked with conducting a study on the possible impact

of the embankment construction on the existing underground pipes, so you will assess tis impact

by applying a Plaxis $2$D numerical model. To carry out this process, you must consider the

following:

How would you model the existing underground large$-$diameter pipes?

What construction phases should the numerical model have?

What results should be analyzed?