Site Investigation in Tunnelling

[Update: This post is by Mr. Ramadoss Muthukuar, details here. He will also be contributing to this blog hereafter]

Each tunnel project is unique! 

A week back I was checking out my collections to study about the Site investigation  I came across  a chapter  "Investigation and description of the ground" from an ebook "Tunnelling and tunnel mechanics—a rational approach to tunnelling" by Dimitrios Kolymbas, Springer Publications, Germany. I found this material is providing necessary guidelines and use of site investigations for planning and design of tunnels.It also provides an overall approach or perspective rather than cookbook solutions. I feel that  inflexible rules or cookbook solutions often work for some situations in design of civil works but not in all geotechnical investigations.

Find below the download link:
https://drive.google.com/file/d/0B2sXZENzNEsLMVhSVXE1bUYtQnc/edit?usp=sharing