It is studied the mechanical behaviour of pile supported embankments during construction, by means of three-dimensional elastic plastic finite-difference numerical analyses. Two main types of foundations are considered: end-bearing piles and floating piles. Particular focus is given to the role of pile-soil interface friction on the evolution of the system. The numerical results are then interpreted in the framework of the macro-element approach: for each type of foundation, rheological models of the system are introduced which are capable of reproducing the numerical evolution of average and differential settlements at the top. The simplifying assumption of drained conditions is assumed.
Si studia il comportamento meccanico di rilevati in terra su pali durante la costruzione. Si utilizzano analisi numeriche tridimensionali alle differenze finite. Vengono considerati due tipi di fondazioni: pali che poggiano su strato rigido e pali completamente immersi in terreno scadente. Verrà data particolare importanza al ruolo dell’attrito all’interfaccia tra palo e terreno di fondazione sull’evoluzione del sistema globale. I risultati delle analisi numeriche sono poi interpretati facendo riferimento alla teoria del macro-elemento: per ogni tipo di fondazione si introducono modelli reologici in grado di riprodurre l’evoluzione numerica dei cedimenti medi e differenziali al top del rilevato. Si assumono condizioni idrauliche drenate.
Numerical analysis and theoretical interpretation of the mechanical response of earth embankments on piled foundations
Corigliano, Matteo
2019/2020
Abstract
It is studied the mechanical behaviour of pile supported embankments during construction, by means of three-dimensional elastic plastic finite-difference numerical analyses. Two main types of foundations are considered: end-bearing piles and floating piles. Particular focus is given to the role of pile-soil interface friction on the evolution of the system. The numerical results are then interpreted in the framework of the macro-element approach: for each type of foundation, rheological models of the system are introduced which are capable of reproducing the numerical evolution of average and differential settlements at the top. The simplifying assumption of drained conditions is assumed.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/170202