We have a water pipe line project which requires micro tunneling at a depth of about 20 meter. We plan to push the pipe for a length of about 60 meter. The subsurface soil consists of dense sand/ silty sand. The ground water ia at about 2m below the ground level.
My concerens are as follows:
1. Is it possible to push the pipe for 60 meter and more length?
2. what kind of dewatering system will be approprite?
3. What kind of safety precautions should we take particularly working at 20 meter deep below the ground water level?
4. Any other valuable suggestions.
your comments are greatly appreciated.