Taken from a collection of papers presented at the prestigious 2010 North American Tunneling Conference, the authors take you deep inside projects from around the world to explore advancements in technology and sustainability, design considerations, project planning, and case histories of small-diameter and conventional tunneling.High accuracy (as low as Ap1cm), positioning anywhere on the earth and working in any weather conditions are the advantages of satellite positioning. ... other interfering signal users ac Does not work under water ac Does not work underground or in tunnels ac Satellite signals can be switched off in specific areas ... This technique is used for horizontal directional drilling (HDD) and detecting the metal utilities.
|Title||:||North American Tunneling 2010 Proceedings|
|Author||:||Lawrence R. Eckert, Matthew E. Fowler, Michael F. Smithson, Jr., Bradford F. Townsend|
|Publisher||:||SME - 2010|