Breakthroughs at Krolsky, Seville

摘要

Lovat has been busy with its TBMs achieving breakthrough on the Krolsky rail tunnel in Russia, and the Seville metro, whilst securing another order in China for the Chengdu metro. The 9.5m diameter mixed face TBM completed the 2,250m long rail bore at Krolsky, in east Siberia, which had varied and difficult geology with fissures, fractures and high inflow rates. Geology along the route comprises slate and granite of up to UCS 250MPa, and blocky sections, as well as saturated loose strata. Inflow varied up to 300m~3 per hour.