Analysis of Talus Slopes Behavior by Geomechanic Simulation in the Stretch between San Rafael de Tabay and Mucurubá in Mérida State

Authors: Núñez R. Yaneth del V.
                Ramírez G. William A.

Tutor: Ing. Sosa C. Grelys A.

Abstract

The Finite-Element Method (FEM) has acquired a huge significance in the solution of engineering problems. Its importance is because it helps solving cases that, until recently, were almost impossible of solving using traditional mathematical methods; however, it is still an approximate method of calculation due to the simplifications taken when it is applied.

The object of this investigation is to analyze the talus slope behavior between San Rafael de Tabay and Mucurubá applying  geomechanical simulation, by means of numerical methods using the suite of software ABAQUS. The studied area has specific geological, hydrological, geomorphological and structural characteristics that determine the proper conditions of every talus slope, which also make them prone to possible mass movement.

In order to carry out this research, it is performed a series previous study phases with the purpose of recognizing the area to study, collecting samples of every talus slope, and determining the geomechanical properties through laboratory assays to use them in the simulation.

The movement values for all the simulations are around an approximate range from 0.1473 m to 0.9947m; while the stresses are around -8.923 E+3 to -9.056 E+6 and the deformations oscillate between 1.617 E-2 to 4.976 E-4. In some areas it is experienced plastic deformation with values superior to 0.003.

The susceptible areas for the occurrence of possible mass movement are located in Los Aleros, Cacute, San Rafael de Tabay and Mucurubá. The studied area is sectorized in levels of susceptibility as: low, medium and high.

Keywords: Finite-Element; Susceptibility; Simulation; ABAQUS.