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<p>As tether-assist feller-bunchers become a fast-growing technology to harvest trees in steep terrain, concerns regarding impacts to soil and water have also grown. These concerns owe to soil in steep terrain being significantly more prone to erosion and potential water quality issues when disturbed. Previous studies show that cable assistance might help with the pressure distribution under tracked feller-bunchers, potentially reducing compaction, compared to those operating without assistance. We implemented a field test in which pressure was measured under the rigid tracks of a stationary feller-buncher, as the operator changed the boom and cabin positions. We found that cable assistance not only reduced the peak ground pressures, but also better distributed the pressure under the track surface. The largest effects of the cable assistance are seen when the equipment is facing downhill, at the bottom of the track (downhill), which is also the highest-pressure scenario under conditions without assistance.</p>

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Characterization of Ground Pressure at Different Cable Tension on Tether-Assist Tracked Self-Leveling Feller-Buncher

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Francisca Belart,
  • Ben Leshchinsky,
  • Woodam Chung

摘要

As tether-assist feller-bunchers become a fast-growing technology to harvest trees in steep terrain, concerns regarding impacts to soil and water have also grown. These concerns owe to soil in steep terrain being significantly more prone to erosion and potential water quality issues when disturbed. Previous studies show that cable assistance might help with the pressure distribution under tracked feller-bunchers, potentially reducing compaction, compared to those operating without assistance. We implemented a field test in which pressure was measured under the rigid tracks of a stationary feller-buncher, as the operator changed the boom and cabin positions. We found that cable assistance not only reduced the peak ground pressures, but also better distributed the pressure under the track surface. The largest effects of the cable assistance are seen when the equipment is facing downhill, at the bottom of the track (downhill), which is also the highest-pressure scenario under conditions without assistance.