Hi,

While browsing around, I have seen this fine article in Tunnelling Journal and I thought it would interest you too.

The author (Richard Lewis of YL Associates) delves into the design of Slurry type Tunnel Boring Machines and gives a detailed comparison of European and Japanese approaches to slurry design.

Enjoy!

https://secure.viewer.zmags.com/publication/6a16a32c#/6a16a32c/21