Eduardo da Silva Lopes

Classificação e custos de estradas em florestas plantadas na região sudeste do Brasil

The classification of forest roads is essential because it allows communication without terminology problems, providing subsidies to the planning, implementation, conservation and evaluation of the existing roads. The objective of this work was to elaborate a classification of forest roads and their respective construction costs and apply this classification to a Brazilian forest company. Through the combination of quality indexes, 20different classes of roads were obtained with their respective transport vehicle operational speed and 120 different types of roads were obtained with their respective construction costs. In the area where this work was conducted, three categories of road were observed: main, secondary and tertiary, with construction cost estimate of R

Avaliação do treinamento de operadores de harvester com uso de simulador de realidade virtual

9050.00, R

Avaliação da umidade na compactação do solo submetido ao tráfego de máquinas de colheita florestal

4050.00 and R

Análise técnica e de custos do transporte de madeira com diferentes composições veículares

2937.00/km, respectively.

Avaliação técnica do trator florestal arrastador "skidder" com diferentes tipos de rodados na extração de madeira em povoamentos de pinus

The present work aimed to evaluate the potential gains from the use off virtual reality simulators in the training of harvester operators. Data were collected during the training of 39 operators, regarding their performance in the following variables: time of execution, fall direction, cut height, processing efficiency and piling up and productivity. The results led to conclude that virtual reality simulators are viable and essential tools in the training of forest machine operators, increasing quality and productivity. Productivity presented the best operator performance with gains of 41.3% in relation to the beginning of the training, followed by time of execution with 38.8% and fall direction, with a mean gain of 36.1%.

Harvesting and wood transport planning with SNAP III program (Scheduling and Network Analysis Program) in a pine plantation in Southeast Brazil

This study evaluated the moisture effect in soil compaction submitted to wood harvesting machine traffic in Pinus taeda L. stands. The study was conducted in the operational areas of a forestry company located in Santa Catarina. The data were obtained in a Humic Cambisol soil in different periods in order to contemplate variations in soil moisture. It was compared the situation without traffic (WT) and after machine traffic (AT) by determining the bulk density (Ds) and soil total porosity (Pt) at the depths of 0 to 15, 15 to 30 and 30 to 50 cm, and soil penetration resistance (PR) in the depths between 0 to 80 cm. The results showed that the major changes caused by traffic of machines in the physical properties occurred with increasing of moisture content. It was also detected changes in the entire soil profile. This demonstrated that the wood harvesting when performed in soils with high moisture contents will cause greater compaction. Among the models compared to estimate the soil penetration resistance, Stepwise Arithmetic Model with Mixed variables (MSAM), which estimated the RP by inverse Ds and Ug in pure form was the one with the best adjustement, explaining 71% of the variation of this property, and evidencing the possible influence of other factors in the estimation of soil compaction.

Compactação de um Solo Submetido ao Tráfego do Harvester e do Forwarder na Colheita de Madeira / Compaction of a Soil Subjected to the Traffic of Harvesters and Forwarders During Wood Harvesting

O transporte de madeira no Brasil e realizado predominantemente pelo modal rodoviario, chegando o frete a representar ate 60% do custo logistico total. Objetivou-se neste trabalho analisar os fatores tecnicos e de custos do transporte de madeira com diferentes composicoes veiculares de carga, na regiao do Vale do Rio Doce, MG. Realizou-se um estudo de tempos e movimentos do ciclo operacional de transporte realizado nos periodos diurno e noturno, da operacao de carregamento e descarregamentode madeira. As analises foram divididas em tres regioes de producao de madeira com diferentes distâncias de transporte. Os resultados indicam quea regiao de Nova Era apresentou o maior tempo produtivo (78,71%) e o pior improdutivo (9,26%). Em relacao aos custos operacionais, as regionais, que utilizavam o bitrem como veiculo de transporte de madeira. Os valores por km de transporte encontrados foram 0,341 R

Avaliação da carga de trabalho físico e da postura de trabalhadores na produção de mudas florestais

/m³.km-1 para Nova Era e 0,249.R

Avaliação técnica de um sistema de pesagem no carregamento florestal

/m³.km-1.para Rio Doce. Para a regiao de Guanhaes, obteve-se o maior custo final da madeira (27,14 R

Soil Compaction Due to Wood Harvesting Traffic at Different Extraction Distances

/m³.km-1).A utilizacao do tritrem como veiculo para transporte de madeira, apresentou os menores custos de m³ transportado por km.