. Shield and compressed air tunneling . SINGLE TRACK TUNNELS 5ixih Ave-Hudson &ManhaHan NY TWIN TUNNELS. [<?- 2235 Rapid Transif,Boston ? --- Spree, Berlin 10 20 30 Fig. 7.—Cross sections of rapid transit railroad tunnels. such a clear space is provided it will be sufficient for a foot walkon which a man can stand safely while a train is passing by, and SIZE AXi) shaiE of tunnels . which will servo to remove the passengers from a stalled trainin an emergency without danger from the contact rail. 5. Station Tunnels.—At stations the tunnels must be widenedto make room
. Shield and compressed air tunneling . SINGLE TRACK TUNNELS 5ixih Ave-Hudson &ManhaHan NY TWIN TUNNELS. [<?- 2235 Rapid Transif,Boston ? --- Spree, Berlin 10 20 30 Fig. 7.—Cross sections of rapid transit railroad tunnels. such a clear space is provided it will be sufficient for a foot walkon which a man can stand safely while a train is passing by, and SIZE AXi) shaiE of tunnels . which will servo to remove the passengers from a stalled trainin an emergency without danger from the contact rail. 5. Station Tunnels.—At stations the tunnels must be widenedto make room for the platform. It is absolutely essential forefficient service of the railroad that the platform be wide enough
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Keywords: ., bookcentury1900, bookdecade1920, bookidshieldcompre, bookyear1922
