Tekhné

12

Authors: Heriberto Echezuría

It was possible to store up to 49 m3 of viscous fluids in clays with different conditions. The injected fluid was stored in ellipsoidal cavities. The orientation of the ellipsoid axes can be defined according to injection needs. For the case of the 49 m3 bulb, it was oriented vertically with a major axis of 5,8 m and a horizontal axis of 4,0 m.It was also demonstrated experimentally that there exists a viscosity threshold above which the bulb can grow without limit, whereas below it only soil fracturing occurs. All the amounts of fluid injected were measured to compare and verify bulb sizes. Verification of the shape of the bulb was performed by tomographic techniques and SPT tests. It was detected that as the bulb grew it could cause failure of the ground above it up to the surface. This failure process was studied with the aid of anchor theories because it was controlled by the depth and size of the bulb. Induced pore pressures during injection indicate that flow during dissipation occursfrom the surrounding soil towards the bulb. The techniques developed during the process of cavity expansion can be applied to dispose materials in delicate areas for which transportation of those materials increase dramatically the operation costs. In addition, those techniques can also be applied to create lenses of soils with improved engineering properties in poor geotechnical profiles to fund with piles or to form columns of granular materials at low cost.

14

Authors: Katherin Jardim, César Itriago

Inventory management is the basis of all good planning for the flow of products. The objective of this study was to propose improvements to the inventory management of a secondary distribution center of a massive consume company, where the type of investigation is not experimental, with a workable project mode and descriptive level. In the work unit, formed by the Secondary Distribution Center (CEDIS), presents the description and analysis of the logistics activities and tasks related, using data recollecting techniques such as the direct non participative observation and non structured interviews techniques, obtaining as result the shipping and handling delay of products, the unknowledge of the capacity and failures of products in the warehouse, where improvement proposal was generated dividing the area in two: warehouse management and transportation of goods from the principal warehouse to the CEDIS. A primordial aspect for inventory management, is the need of having a warehouse with: adequate capacity, meets safety standards, defined operational areas and right storage of their products; for this reason was made the study of this aspects, defining the suitable reposition control for the inventory to prevent failure of customers orders. For the realization of the proposal were used several Industrial Engineering tools such as: Ishikawa diagrams, SWOT analysis (Strengths, Weaknesses, Opportunities y Threats), criticality analysis, entity relationship (E-R), ABC classification, average distance traveled, vertical space utilization, positioning labels creation, use of indicators and the creation of a program that facilitate the realization of purchase orders and maintenance of the inventory control.

23

Authors: Xavier Matheus, Rafael Torres

This paper proposes a calculation methodology for the development of highway bridge decks reinforced concrete beams in bridges located on main roads and secondary roads or agricultural penetration, using the AASHTO LRFD(1). During development of the subject, is appended to each equation the article stated in the rule. The separation between beams and the length of the flights of the slab, are selected for optimum conditions the design hypothesis is based on economic criteria. All beams of the bridges must be of equal resistance, therefore equal amount of reinforcing steel, as such, are selected separation between beams and flown, such that the difference between the maximum reinforcing steel (As major) and minimum (As minor) required for the different beams will not exceed 10%, ie. The final separation between beams is rounded to multiples of five centimeters, facilities construction, this condition implies not have values of ε = 0% (optimum condition). With the permanent loads and variable determining the shear stress and moment which are combi HTO LRFD (1), by the theory of limit state of fatigue resistant reinforcing steels obtained by cutting and flexion.