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Autonomous excavator constructs a six-metre-high dry-stone wall (ethz.ch)

568 points by belter · 1001 days ago · 185 comments on HN

Article summary

Researchers at ETH Zurich have developed an autonomous excavator that can construct dry-stone walls using locally sourced materials. The excavator, called HEAP, uses sensors and machine vision to scan and grab large stones, and an algorithm to determine the best position for each stone. The team built a six-metre-high and sixty-five-metre-long dry-stone wall using this technology. The wall is part of a digitally planned and autonomously excavated landscape and park.

Main themes

  • autonomous construction
  • dry-stone walls
  • environmental sustainability
  • construction technology
  • job assistance
  • human labor reduction
  • structural integrity
  • automation in construction

What commenters say

  • The autonomous excavator's ability to construct dry-stone walls is impressive, but its lack of human-like precision and attention to detail is a limitation.
  • The use of shotcrete to reinforce the wall could compromise its environmental benefits due to the high CO2 output of concrete production.
  • Gabions could be a better alternative to shotcrete for stabilizing the wall, but they require careful planning, anchoring, and leveling to ensure stability.
  • The autonomous excavator has the potential to reduce human labor and improve job assistance in the construction industry, but it is not a replacement for human workers.
  • The excavator's greedy algorithm may not be the most efficient approach to constructing dry-stone walls, and alternative algorithms could lead to better results.
  • The environmental benefits of dry-stone walls, such as using locally sourced materials and allowing for water drainage, are important considerations in their construction.
  • The use of automation in construction can help reduce the physical toll on human workers and improve the quality of life for those in the industry.
  • The stability and safety of dry-stone walls constructed by autonomous excavators are concerns that need to be addressed through further research and development.