diaphragm seal retains Tunnel boring machine (TBM) cool by a continuous water provide. The Cross Rail challenge is an east-west rail route that passes beneath the city of London using new twin-bore 21km tunnels.
EuroFlo pumps and the tanks are positioned on the floor; the water is pumped from there down to the shaft and all alongside the tunnel as a lot as the TBM. Once the water has handed via the TBM system the remaining water comes again through a filtration system to the tanks on the surface, out of the tunnel.
The water circuit provides 20 l/s to every TBM and eight l/s is used within the TBM for various works and 12 l/s returns to the tanks. The inlet stress wanted ranges between four and 10 bar. On one web site three TBM’s are operating and the pump system delivers 60 l/s, with the tools consisting of one single tank (3200m3) and one industrial pump used per tunnel. On one other web site, the installation support’s the excavation with only one TBM with 20 litres/second and the water storage tank capability of 1100m3
EuroFlo use 37 kW vertical multistage Industrial pumps for the cooling system while the TBM excavates via a serious underground section of the Cross rail challenge.
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