Determination of rock foundation levels for the expansion of the Cañaveral - Colombia shopping center, based on geophysical tests and their correlation with direct exploration Determinación de los niveles de cimentación en roca para la ampliación del Centro Comercial Cañaveral a partir de ensayos geofísicos y su correlación con exploración directa

Abstract

The Cañaveral shopping center is located by recent alluvial deposits of low consistency, supported on sedimentary rock, influenced by the presence of a geological fault. Considering that the loads on the foundation are of great magnitude, it is necessary to build deep caisson foundations to reach the rock. However, performing a borehole on each one of them represented a very high cost and long execution times. Therefore, an alternative was proposed to determine the depth levels of the rock through different geophysical tests and try to calibrate the results through the correlation of some boreholes. During the execution and data processing phase of the geophysical tests,

difficulties were encountered due to the level of environmental noise and the obtaining of the wave records, given the variability of the rock levels and eventhe effect that in some sectors of the study area the rock is very sub-surface. In conclusion, it was possible to identify the strengths and weaknesses of each of the exploration methods and generate a 3D map of the depths of the rock levels that served as input for the design and budget of the foundations, which were verified by constant supervision during construction to determine the error percentages.