Estimación de los parámetros de resistencia cortante para suelo tipo conglomerado

Abstract

The present work focuses on the study of conglomerate, a heterogeneous soil formed by blocks, rocks that cover a wide range of sizes (larger than 3") and the matrix formed by gravel, sand and fines. This soil is commonly found on the banks of rivers in the city of Cuenca. The main objective is to approximate the parameters of shear strength, friction and cohesion, by means of two methodologies: empirical relationships and back-analysis; for this, first, characterization and strength tests were performed on the matrix. For the first methodology, the theory for Bimsoils presented by Kalender et. al (2014), and the one presented by Duncan (2012) were applied, the first one requires parameters such as: percentage and characteristics of the blocks, and resistance of the matrix, after applying this methodology an approximate friction angle of 39° and a cohesion between 12 and 24 KPa were obtained; on the other hand, the second empirical methodology takes into account parameters such as granulometry, relative density and confining pressure, with this one a friction angle of 51.37° was determined. With the back-analysis methodology, a friction angle close to 53° and cohesion of 2.6 KPa were determined. Finally, comparing results it is identified that the difference in the values obtained is due to the different conditions under which the study is performed, being the empirical methods a more practical and applicable option than the back analysis due to the limitations of the method and the information it requires.