The entrance of a tunnel being created by a tunnel boring machine can be as fascinating as the TBM itself.nbsp Countless systems are being fed and networked to workers miles away. nbspThat intricacy doesnrsquot just stop there. Even a seemingly simple task like routine maintenance can be a complex undertaking.nbsp When poor ground conditions and or water is encountered, the engineering and coordination involved get taken to the next level.nbsp Utilizing polyurethane injection, grouting contractor SubTechnical, Inc. consistently provides engineered solutions in ground and water control for the tunneling industry.nbsp
