Physical Soil Properties and Slope Treatments Effects on Hydraulic Excavator Productivity for Forest Road Construction

Parsakho, A; Hosseini, Seyed Ataollah; Jalilvand, H.; Lotfalian, Majid

doi:10.3923/pjbs.2008.1422.1428

Cited by 11 publications

(3 citation statements)

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“…In excavation work beyond ME, other random conditions may vary. For instance, terrain, soil stoniness, soil moisture, soil bulk density, and prevalence of tree stumps, are all particularly prudent to calculating productivity in forestry work (Filipsson and Eriksson, 1989;Parsakho et al, 2008). Optimal and adverse descriptions of these kinds of random condition relative to ME (based on the researchers' practical experiences and the literature) are shown Table I.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The latter concept can be seen in practice in Plate 1(C) and is explained technically in Figure 1. Soil (and hence spoil) conditions generally, can considerably affect excavator productivity (Parsakho et al, 2008). All of these productivity modifying factors can yield significant variance in productivity calculations.…”

Section: Excavator Productivity Modifying Factorsmentioning

confidence: 99%

“…loading excavated spoil into another vehicle for moving) are more generically defined as earthmoving operations (BS EN 474-1, 2006, p. 10). Excavator productivity when performing these types of work is usually expressed in cubic volume of excavated material per unit of time (Parsakho et al, 2008;Pratt, 2010), e.g. m 3 /hr.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of interrelationships among excavator productivity modifying factors

Holt

Edwards

2015

International Journal of Productivity and Performance Management

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Purpose – Excavator productivity calculations embrace myriad variables, which in turn, can be modelled in several ways. A key productivity variable is operator competence (O c ) because this can impact on so many of the other variables. Earlier research has studied excavator productivity, but little has attempted to simultaneously model productivity variables in relation to O c . The purpose of this paper is to address the void in extant literature. Design/methodology/approach – A numeric, theoretical analysis is undertaken using the Caterpillar® hydraulic excavator productivity model to estimate excavator production, given: first, variance in modifying factors based on derived maximum and minimum values; and second, variance resulting from linear calculations based on excavator operator competence. Findings – Excavator productivity resulting from incremental variance of modifying factors in isolation is shown to be linear except, in the case of bucket payload. Simultaneous application of modifying variables results in a greater, curvilinear productivity trend; while it is demonstrated that quantification of key modifying factors can to a significant extent be related to operator competence. Research limitations/implications – Findings add to productivity literature generally and to that of plant and equipment more specifically. Results will help productivity estimation of excavation in a practical sense while informing subsequent design of an empirical academic research of this problem. Originality/value – Originality relates principally to determining modifying factor ranges and their analysis of simultaneous effect on each other, especially, as influenced on assumptions of operator competence.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Excavator Productivity Modifying Factorsmentioning

confidence: 99%

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Analysis of interrelationships among excavator productivity modifying factors

Holt

Edwards

2015

International Journal of Productivity and Performance Management

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An environmental assessment of forest stands damages caused by excavators during road construction in Beech forests

Melemez

2012

Int. J. Environ. Sci. Technol.

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Construction of forest roads can cause shortterm and long-term negative effects on forest ecosystems in different ways if they are not well planned and appropriately maintained. In this research, environmental damages caused by an excavator during road construction were examined in steep terrain covered by beech (Fagus orientalis L.) stands. The study was conducted along a 1.5 km road in western Blacksea Region of Turkey. All of the road construction operations were monitored during a construction period, and measurements of cross sections sizes and stand damages were measured during and after the construction activities. The road construction was evaluated according to the appropriate method and standards. The average widths of roadway, fill slope and construction zone were 4.82, 6.91, and 16.61 m, respectively. Along the 1,500 m road, forested area impacted was 24,915 m 2 while the number of trees cut was 1,495 and rate of the damaged trees below the fill slope was found to be 24.7 %. In the study, based on the appropriate method and standards, less forested area might have been impacted (23 %). As a result of regression analysis, it was found that the rate of damaged trees increased as the values of the proportion of rocks, the width of the road surface and the width of the cut-slope increased. To reduce the negative effects of forest road construction on the environment, new forest road construction by excavators should be performed using appropriate methods within mountainous terrains.

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