Blanka tunnel collapse

摘要

Dear Sir, The August issue of Tunnels and Tunnelling International contained, on page 14 in the News column, an article by Kris Mole titled: Questions asked as Blanka Tunnel collapses for third time.The ITA-AITES Czech Tunnelling Association supposes that it must let you know about its opinion on the content of the above-mentioned article.A third collapse of a mined tunnel on a single tunnelling project is certainly a serious matter. Nevertheless, it is necessary to know that the Blanka Complex of Tunnels project is exceptionally extensive and has been implemented in very difficult and variable geotechnical conditions.