نتایج جستجو برای: rut depth

تعداد نتایج: 161431  

2001
Abdullah E. Akay

ABSTRACT: A model is developed to minimize the sum of road construction plus forwarding costs with the constraint that rut depth caused by the forwarder cannot exceed a maximum depth during the anticipated season of operation. Road spacing, forwarder trail spacing, and forwarder capacity are used as decision variables in developing the transportation plan. The total cost was minimized using the...

2012
Juang Rata Matangaran

Soil compaction by machine used in forest harvesting operation caused negative impacts for regeneration and tree growth. This research was intended to analyze the effectiveness of using slash to decrease soil compaction, to analyze soil compaction at various soil depths, and to measure rut depth at soil surface. Valmet 860.1 forwarder was used in this research. Soil compaction was measured thro...

Journal: :Remote Sensing 2017
Paavo Nevalainen Aura Salmivaara Jari Ala-Ilomäki Samuli Launiainen Juuso Hiedanpää Leena Finér Tapio Pahikkala Jukka Heikkonen

The rut formation during forest operations is an undesirable phenomenon. A methodology is being proposed to measure the rut depth distribution of a logging site by photogrammetric point clouds produced by unmanned aerial vehicles (UAV). The methodology includes five processing steps that aim at reducing the noise from the surrounding trees and undergrowth for identifying the trails. A canopy he...

Journal: :ماشین های کشاورزی 0
احمد شریفی مالواجردی محمد یونسی الموتی احمد محسنی منش

soil compaction can occur as a result of a number of factors. one of the most important factors is soil response to pressures imposed by wheels and soil engaging tools. this research investigated the effect of tyre load and inflation pressure on soil compaction-related factors. these factors include rut width, rut depth, cone index and horizontal force in different layers of soil profile. in th...

2013
Isa Jacoba Marx Niël van Wyk Salome Smit Daniel Jacobson Marinda Viljoen-Bloom Heinrich Volschenk

BACKGROUND The lignocellulosic enzymes of Trichoderma species have received particular attention with regard to biomass conversion to biofuels, but the production cost of these enzymes remains a significant hurdle for their commercial application. In this study, we quantitatively compared the lignocellulolytic enzyme profile of a newly isolated Trichoderma asperellum S4F8 strain with that of Tr...

Journal: :international journal of transportation engineereing 2016
saeed sadeghpour galooyak masoud palassi ahmad goli hossein zanjirani farahani

in this study, different contents of nano-silica, 2 wt.%, 4 wt.% and 6 wt.%, have been added to bitumen tomodify the physical, mechanical and rheological properties of warm mix asphalt (wma). wma iscontaining 2 wt.% of sasobit (mixture of long-chain hydrocarbons). various quality control tests have beencarried out to characterize the modified bitumen and wma. the rheological investigations show...

Journal: :Advances in Materials Science and Engineering 2021

The water accumulated in the rutted road sections poses a threat to safety of vehicles. Water-filled ruts will cause partial or complete loss friction between tires and surface, leading driving hazards such as hydroplaning sliding. At present, maximum depth left right is mostly adopted analyze water-filled ruts, ignoring uneven change direction cross-section direction, which cannot fully reflec...

2014
Ramin Naghdi Ahmad Solgi

Skidding operations induce changes in soil physical properties, which have the potential to impact soil sustainability and forest productivity. Our objective was to investigate the effects of traffic frequency, trail slope, and soil moisture content on soil compaction, total porosity and rut depth. Treatments included a combination of three different traffic intensities (3, 7, and 14 passes), t...

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