Instructivo para el análisis estático de las estructuras de contención y de control de sedimentos en un sistema fluvial de derivación cimentado en suelo

Abstract

In the present work, procedures are developed and applied for the static analysis of the retaining structures (dam made of local material and concrete), in the river diversion systems, as well as the concrete walls that are part of the conventional gritters in such systems. The analysis of these structures is carried out for five scenarios. each identified through: a) a basic geotechnical condition of the foundation soil (friction coefficient); b) a characteristic hydraulic condition (unit flow for the design flood; c) the normal operating level of the diversion system. The analysis that is developed for each of the proposed scenarios includes: verification of reduced stability (circular in the case of the dam made of local material and flat in the case of the dam and concrete walls); verification of mechanical resistance through the main forces in the cross section with the highest loading; Verification of resistance to seepage along the seepage flow in the foundation soil and in the earthen dam. The concrete dam considered is with built-in discharge which, therefore, required the configuration of the hydraulic profile and the analysis of energy dissipation in the downstream link. Finally, for the dam and concrete walls, the need to carry out the deep gradual analysis was verified, in case there is a possibility of shear failure inside the foundation soil.