ABSTRACT
As stated in the Preface, this book is not a cookbook and, in my opinion, nor should it be. Given the variability of nature and the limitless plausible scenarios for a tunnel, it is impossible to write a simple guide that dictates how to design a tunnel under every imaginable circumstance. The art of tunnelling lies in applying knowledge to the unique situation facing an engineer. To aid this process, this chapter discusses the logic that underpins good design practice.
