Earthbag root cellar progress

We just started our earthbag root cellar addition to our earthbag earthship. The workshop went really well and progress continues. Our next workshop will be building an earthbag chicken coup in Leicester, NC on May 26th and 27th. More info at http://sustainablelifeschool.com

I'm curious if anyone is aware of earthbag construction to form a dome which would then be covered with dirt (for a root cellar). Does Kelly Hart's book address this (earthbag ceiling)?

Tim Skufca wrote:I'm curious if anyone is aware of earthbag construction to form a dome which would then be covered with dirt (for a root cellar). Does Kelly Hart's book address this (earthbag ceiling)?

Like this?

Minidome.

Progress update.

Any more progress on this project? I want to include a root cellar in my future place, and was thinking earth bags would be a good choice to limit wear and tear from the elements, without using concrete.