The 9 km long Kallidromo tunnel of the new highspeed railway line Athens-Thessaloniki, Greece, tunnel sections in squeezing ground

摘要

In course of the new highspeed railway line from Athens to Thessaloniki, the approx. 9 km long Kallidromo tunnel is to be constructed with two single-track tubes. After completion of approx. 2X1.5 km on either side, the works had to be interrupted in 2002. Difficult heading and failures of the support had to be dealt with in squeezing ground. Design for the remaining tunnel sections was re-done. For the tunnel sections in squeezing ground, a yielding support with a slotted shotcrete membrane and a special type of yielding anchors is foreseen in the new design.