Reinforcement with Geosynthetics of Walls of the Saltpans of the Aveiro Lagoon

The aim of this article is to investigate the solution for the reinforcement of the walls of the saltpans of the Aveiro lagoon by using geosynthetics. For that purpose literature research has been done to collect both the properties and the geometry of the walls and of the soils. Simultaneously, methods for the design of reinforced soils using geosynthetics were collected, particularly to allow the consideration of two types of backfill soil: granular and fine. So, two solutions for such walls were studied using granular and fine soils, respectively. The design methods used were the ones proposed by: Jewell (1996) and Rogbeck et al. (2002) for granular soils and Naughton et al. (2001) for fine soils. Finally, the verification of the external stability of the profiles of a selected wall has been made using the methodology described in Eurocode 7: EN1997-1: 2004

Nuclear Mass Number

An optical potential abrasion-ablation collision model is used to calculate hadronic dissociation cross sections for a 14.6A GeV 28 Si beam fragmenting in aluminum, tin, and lead targets. The frictionalspectator -interaction (FSI) contributions are computed with two different formalisms for the energy-dependent mean free path. These estimates are compared with experimental data and with estimates obtained from semiempirical fragmentation models commonly used in galactic cosmic ray transport studies. Introduction As the era of career astronauts who will crew Space Station Freedom, establish lunar bases, and explore the solar system approaches, concern is mounting over the possible harmful effects to these crews from the high-energy heavy ion component of solar and galactic cosmic rays (refs. 1 and 2). To adequately assess these risks, knowledge of cosmic ray interactions in bulk matter is required. A major source of uncertainty in these radiation risk assessments is the fragmentation ..