Engineering and Contracting . o a consular report. About70 per cent of the ties in use on the Federal (|uality of gravel is available for ties are used in tunnels and in lo-calities where the conditions do not permitof good drainage along the railways. Theyare also generally used in street crossings intowns and cities where the track is gradedwith gravel up to the level of the the cost of metal is greatly in excess The Principal Long Tunnels of theWorld. The following table of the principal tun-nels of 2 miles or more in length has beencompiled by the Engineer of Lond
Engineering and Contracting . o a consular report. About70 per cent of the ties in use on the Federal (|uality of gravel is available for ties are used in tunnels and in lo-calities where the conditions do not permitof good drainage along the railways. Theyare also generally used in street crossings intowns and cities where the track is gradedwith gravel up to the level of the the cost of metal is greatly in excess The Principal Long Tunnels of theWorld. The following table of the principal tun-nels of 2 miles or more in length has beencompiled by the Engineer of London. Thereare 52 tunnels listed, of which only one is inthe United States, which is accounted for ob-viously by the fact that the list includes onl;.railway tunnels and also only tunnels whollyin rock. Long tunnels now being constructedoutside of Europe, even those of the classspecified, are also not included, which elim-inates other possible representation, as forexample the Montreal Tunnel, by works ofthe \morican continent:. Fig. 3. Tower and Concrete Chuting System for Euclid Avenue Bridge. railways of Switzerland are metal. The ma-jority of the wooden ties used are made ofSwiss wood. • Metal ties were first used on the Swissroads in 188L since which time they havegradually replaced, to a large extent, thewooden ties. Iron ties are especially recom-mended on the Swiss roads where a good TUNNELS IN EUROPE OF TWO MILES Name of tunnel- Slmplon* St. Gothard Lfischberg Mont Cenis A rlberg Ricken Tauern Ronco Tenda* Jungfraut Severn Turenlno* Wochelner Totlcy Pelorltana* Gravehals* StandPdgp Wnoflhrarl * La Nerthn Kalspr Wllhelm ... Echarmeaux Blal8y Sodbury Credo Vlzzavonat DiBlev Col dp St. MIchelt. Bramhopp Fpstlnlog* Cowhurn ^feudo^ Glovl Col des Loges* Crcmollna* Calrasca* Hauenstein SemmTing ! Countr;..Switzerland-Italytjwitztrland-Italy Switzerland France-Italy Austria Switzerland Austria Italy Italy Austria Switzerland Italy Knglan
Size: 2331px × 1072px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
