Sistemas de drenagens em obras de contenções de taludes

Abstract

In slope containment works, whether road or not, the presence of water in the massif should be taken into account, so that its effects are minimized and eliminated, since their accumulation is one of the main factors determining slope instabilities, which may lead to some pathological manifestations, both in steel and concrete, increasing maintenance costs, reducing the safety of the massif, and even compromising the stability of the slope. For this, in addition to hydrogeological considerations, defined in terms of water table position and preferred flow directions, slope contentions should be dimensioned taking into account the hydrostatic force of the waters or diverting their flow. Thus, it is necessary to implement a properly sized and properly drained drainage system, when necessary, taking appropriate measures for energy dissipation, capable of efficiently and cost-effectively attending, in the same way as it is extremely important the provision of periodic monitoring for this system. These solutions for the proper handling of the water flows present in the soil masses can be possible with the use of surface drainage devices, such as the execution of hydraulic stairs, barbacans, sub-horizontal drains, and deep drainage. The objective of this work is to present and discuss the most efficient drainage for certain soil containment works with the vision of the executive methodology of each of the methods, raising some cases of works whose solution was done through a drainage system. Experiments are also developed to compare the efficiency between different draining devices. Key words: Drainage. Slopes. Containment.