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Geomechanics and Engineering
  Volume 11, Number 1, July 2016, pages 59-76

Numerical simulations of deep penetration problems using the material point method
R. Lorenzo, Renato P. da Cunha, Manoel P. Cordão Neto and John A. Nairn

    Penetration problems in geomechanics are common. Usually the soil is heavily disturbed around the penetrating bodies and large deformations and distortions can occur. The simulation of the installation of displacement piles is a good example of the interest of these types of problems for geomechanics. In this paper the Material Point Method is used to overcome the difficulties associated with the simulations of problems involving large deformation and full displacement type penetration. Recent modifications of the Material Point Method known as Generalized Interpolation Material Point and the Convected Particle Domain Interpolation are also used and evaluated in some of the examples. Herein a footing submitted to large settlements is presented and simulated, together with the processes associated to a driven pile under undrained conditions. The displacements of the soil surrounding the pile are compared with those obtained by the Small Strain Path Method. In addition, the Modified Cam Clay model is implemented in a code of MPM and used to simulate the process of driving a pile in dry sand. Good and rather encouraging agreement is found between compared data.
Key Words
    MPM; penetration problems; pile installation effects; large deformation; MCC; SSPM
(1) R. Lorenzo:
Department of Civil Engineering, Federal University of Tocantins, Av NS 15 Bala I, Palmas, Tocantins, Brazil;
(2) Renato P. da Cunha, Manoel P. Cordão Neto:
Department of Civil and Environmental Engineering, University of Brasilia, Campus Darcy Ribeiro, Asa Norte, Brasilia, Brazil;
(3) John A. Nairn:
Wood Science and Engineering, Oregon State University, Corvallis, OR 97331, USA.

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