1.0Robbinshttps://www.robbinstbm.com/es/The Return of TBMs to Norway at Røssåga HEPP—TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges - Robbinsrich600338<blockquote class="wp-embedded-content" data-secret="6rMYlZPMu3"><a href="https://www.robbinstbm.com/es/rossaga/">The Return of TBMs to Norway at Røssåga HEPP—TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.robbinstbm.com/es/rossaga/embed/#?secret=6rMYlZPMu3" width="600" height="338" title="“The Return of TBMs to Norway at Røssåga HEPP—TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges” — Robbins" data-secret="6rMYlZPMu3" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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https://www.robbinstbm.com/wp-content/uploads/2017/07/Image-5-1.jpg30722304The TBM that broke though at Røssåga HEPP in December 2015 was the first to breakthrough in Norway in more than 20 years. During the excavation the TBM encountered extremely hard rock (over 280 MPa), which posed an extreme challenge for both the TBM and the cutters.