Evaluación probabilística del riesgo de inundaciones bajo escenarios de cambio climático en una cuenca de los Cintis Chuquisaca

Abstract

This document presents the analysis of two types of subgrade soils, A-2-4 and A-2-6, which, according to their characterization, exhibit different behaviors due to the structural composition of the internal particles of the soil itself. This behavior is also affected by the moisture content introduced in the soil study.  The resilient modulus was determined using both the empirical and experimental methods. The empirical method consists of using empirical equations based on the California Bearing Ratio (CBR), while the experimental method involves determining the resilient modulus in seven samples for each type of soil using the Servo-Pneumatic Universal Testing Machine CRT-UTM-UN from COOPER TECHNOLOGY, which incorporates the parameters of the AASHTO T307-99 standard. The samples for the study have varying moisture content percentages. For A-2-4 soil, the following moisture percentages were considered: wopt+2, wopt+1, wopt, wopt-1. For A-2-6 soil, the moisture percentages considered were: wopt+2, wopt+1, wopt, wopt-1, wopt-2.  The behavior of the resilient modulus under axial stress applied within a confining pressure was observed, and the accumulated deformation during the test, as well as the variation of the resilient modulus with respect to the deviatoric stress, were verified. A flexible pavement design was carried out following the South African mechanistic-empirical design method (SAMDM). The application of the design was done using pavement analysis software EVERSTRESS 5.0, which performed the elastic layer analysis, determining stresses, deformations and deflections, and appropriately incorporating the resilient modulus results into a structural pavement analysis.”