Analysis of the effects of the cost and benefit in the channeling of the stream of the 84 street in the city of Barranquilla

To date the problem of streams is a reality that all Barranquilleros face in Winter time, where the sectors of economy and industry in the city are affected, causing economic, material and in some cases human losses. One of the solutions by the District of Barranquilla has been the implementation of conducting rainwater through box-culverts and underground pipes, as it is for the case of the stream of the 84 street (Siape). The main objective of this research is to analyze the most relevant effects from the social, economic and environmental point of view during all stages of this construction project. In the first phase of the research, different techniques were used to search and collect information, which allowed finding the most important effects in the social, economic and environmental aspects that this project generated. The tools used for this were official technical documents of the designs, tenders, environmental management plans and statistical techniques such as surveys and interviews, which served to expand knowledge of the area of influence. The results show that the negative effects occur during the construction phase; however there are more positive effects that result in the implementation of the project, being in this case a significant valorization of the area and increase in the quality of life of the inhabitants, the most relevant effects of this construction project.Hasta la fecha la problemática de los arroyos es una realidad que todos los barranquilleros afrontan en época de invierno, donde se ven afectados los sectores de la economía y de la industria en la ciudad, provocando pérdidas económicas, materiales y en algunos casos humanas. Una de las soluciones por parte del Distrito de Barranquilla ha sido la implementación de conducir las aguas lluvias por medio de box-culverts y tuberías subterráneas, como lo es para el caso del arroyo de la calle 84 (Siape). El objetivo principal de esta investigación es analizar los efectos más relevantes desde el ámbito social, económico y ambiental durante todas las etapas de este proyecto de construcción. En la primera fase de la investigación se empelaron diferentes técnicas para la búsqueda y recolección de información, que permitiera hallar los efectos más importantes en los aspectos sociales, económicos y ambientales que este proyectó generó. Las herramientas utilizadas para esto fueron: documentos técnicos oficiales de los diseños, licitaciones, planes de manejo ambiental y técnicas estadísticas como encuestas y entrevistas, que sirvieron para ampliar el conocimiento de la zona de influencia. Los resultados demuestran que los efectos negativos ocurren durante la etapa de construcción, sin embargo son más los efectos positivos que resultan en la puesta en marcha del proyecto, siendo para este caso una significativa valorización de la zona y aumento en la calidad de vida de los habitantes, los efectos más relevantes de este proyecto de construcción

The incidence of alternative minimum load values in masonry partition and lightweight partition systems with a cost analysis in Barranquilla, Colombia

This paper presents the structural behaviour of a 11-storey tall rectangular building for residential use in three configurations with different partition systems. The three partition systems considered were as follows: masonry partitions made from clay brick, masonry partitions made from concrete block and lightweight partitions made from drywall. The structural analysis was carried out considering dead, live and earthquake loads. For the calculation of the dead loads generated by the non-structural elements such as partition walls two type of analysis were considered for each partition system. The first one with the alternative minimum loads suggested by the Colombian Earthquake Resistant Building Regulations, NSR-10 and the second one with the real calculated loads. In total six structural analyses were carried out. Lower values as much as 17% for maximum vertical deformations and 18% for story drifts have been obtained for the analysis with the alternative minimum loads compared to the real calculated loads. For both type of analysis, the building with lightweight partition system behaved best, lower values as much as 12% for deformations and 19% for drifts have been obtained. Also, the cost analysis shows that it is more economical to construct the building with drywall partitions, the reduction in cost being 12% in comparison to masonry partitions

Current legal regulations applicable during the life cycle stages of civil projects of public works in the city of Barranquilla

Los proyectos civiles de obras públicas en la ciudad de Barranquilla han jugado un papel muy importante en el desarrollo de la ciudad y es por ello que se hace necesario el conocimiento de las normativas que se deben cumplir en cada una de las etapas de sus ciclos de vida, ya que cada día el número de proyectos aumenta y esta necesidad crece. Atendiendo a esta necesidad, con esta investigación se pretende compilar la normativa legal vigente aplicable durante las etapas del ciclo de vida de los proyectos civiles de obras públicas en la ciudad de Barranquilla. En primer lugar se realiza la identificación de las etapas del ciclo de vida de los proyectos y las entidades que las regulan a nivel nacional, partiendo así del análisis de la información recolectada. Las herramientas utilizadas para la realización de este estudio fueron la guía del PMBOK, entrevistas realizadas a profesionales del área, opiniones de participantes indirectos y las fuentes bibliográficas.Civil projects of public works in the city of Barranquilla have played a very important role in the development of the city and that is why it becomes necessary to know the regulations that must be fulfilled in each of the stages of its life cycles, being that each day the number of projects increases and this need grows. In response to this need, this research aims to compile the current legal regulations applicable during the life cycle stages of civil projects of public works in the city of Barranquilla. Firstly, the identification of the stages of the life cycle of the projects and the entities that regulate them at the national level is carried out, starting from the analysis of the information collected. The tools used to carry out this study were the PMBOK guide, interviews with professionals in the field, opinions of indirect participants and bibliographic sources

Urban quality of life assessment in the main cities of Colombia

La evaluación de la calidad de vida urbana se desarrolla a través de indicadores denominados índices de calidad de vida urbana (ICVU), que permiten expresarla en escala numérica siendo de gran importancia para investigadores, planificadores y encargados de la gestión pública en la toma de decisiones. En Colombia no se ha realizado trabajos previos que comparen integralmente según su Calidad de Vida Urbana (CVU) las diferentes ciudades, es por ello que en el presente artículo se realiza una evaluación de esta en las seis principales ciudades colombianas, diseñando y evaluando un ICVU que integra cuatro dimensiones (Social, Económica, Ambiental, Servicios y Gestión), se toma en cuenta para ello diez indicadores y cuarenta y nueve sub-indicadores. El estudio comprende datos de los años 2011, 2012 y 2013

Chemical and nano-mineralogical study for determining potential uses of legal Colombian gold mine sludge: Experimental evidence

The present study is focused on the chemical and nano-mineralogical characterization of sludge from gold mine activities, in order to put forward diverse solution alternatives, where lack of knowledge has been found. The sample was collected from “La Estrella” mine of Suarez, located in Department of Cauca, south-west Colombia. The sludge micro-structure and chemical composition were analyzed using a high resolution transmission electron microscopy (HR-TEM) equipped with a dispersive X-ray detector (EDS). X-ray diffraction technique was employed to identify the mineralogical phases present in the sludge. Additional mineralogical characterization was done by using RAMAN spectroscopy. Main findings points to its potential to be used as a fertilizer, this is why, mine sludge contains macronutrients such as P, Ca and S, together with micronutrients like Cu. However, the presence of goethite could decrease the mobilization of nutrients to soils, thus additional alternatives, for instance, a mixture with humus or another material containing Humic Acids should be done, in order to minimizing its retention effect. Additionally, another possible uses to explore could be as construction and ceramic material or in the wastewater treatment for nutrient retention and organic material removal. Rutile (TiO2 nanoparticles) particles have been also detected, what could cause health concern due to its nanoparticle toxic character, mainly during gold extraction process