Burdock piling

Burdock piling (牛蒡積み, gobouzumi) is an advanced Japanese technique for building stone walls, named after the resemblance of the rough stones used to the ovate shapes of the blossoms of Japanese burdock plants.[1][2] It was used to build ishi gaki (石垣, stone wall), sloped stone walls which make up the foundations of many Japanese castles, such as Osaka Castle.[3]

The ishigaki of Ōzu Castle

Large rocks are fitted together over a mound of earth, and the remaining cracks are filled in with pebbles. This stone fill is called kuri ishi (栗石, chestnut stones) because of their small size. No mortar was used in the building of castle walls, which allowed the individual stones to move slightly during earthquakes without causing significant wall damage.

This technique grew from an earlier Japanese wall-building technique known as disordered piling.[2]

See also

References
  1. Japanese Architecture and Art Net Users System - gobouzumi
  2. pacificu.edu - Japanese Castles Archived 2013-02-05 at the Wayback Machine
  3. Thinkquest.org - The Castles of Japan: Walls/Moats Archived November 12, 2011, at the Wayback Machine


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