. Engineering und Contracting. , So dass nicht mehr als 2 oder 3 Stunden, Arbeit für theshovel auf der dritten Schicht. Dieser linken Fast thewhole der dritten Schicht für das Bohren der liftholes. Lüftung - Weehawken considerabledifficulty wurde durch Nebel und Rauch ac-Kumulierung im Tunnel nach dem Strahlen verursacht. Thiswas generell schlechter an den Tagen, wenn der Baro - metrische Druck außerhalb gering war, und noch schlimmer Passagen zwischen dem, in dem die Lüfter wasplaced und die Münder der Tunnel shouldbe blockiert fest. Es gab einige Schwierigkeiten inkeeping Diese enge Sperrung wegen der forceof dem Strahlen Ausblasen der b

• Bildanbieter: The Reading Room / Alamy Stock Foto
• Bild-ID: 2AFHCJR
• Dateigröße: 7,1 MB (207,1 KB Komprimierter Download)
• Freigaben (Releases): Model - nein | Eigentum - nein
• Format: 1752 x 1426 px | 29,7 x 24,1 cm | 11,7 x 9,5 inches | 150dpi

Weitere Informationen

Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel

. Engineering and Contracting. , leaving not more than 2 or 3 hrs, work for theshovel on the third shift. This left nearly thewhole of the third shift for drilling the liftholes. Ventilation.—At Weehawken considerabledifficulty was caused by fog and smoke ac-cumulating in the tunnels after blasting. Thiswas generally worse on days when the baro-metric pressure was low outside, and worse passages between that in which the fan wasplaced and the mouths of the tunnels shouldbe blocked tight. There was some difficulty inkeeping this blocking tight, owing to the forceof the blasting blowing out the bulkheads.The fan, however, did good service when itand the bulkheads were in good order. Thecompressed air discharged from the drillskept the headings fairly clear, as well as thatpart of the tunnel between the headings andthe fan. The fan was moved ahead to thenext cross-passage at Station 277 when thework had progressed far enough, and wasused there for some time; it was found, how-ever, that by the time the excavation had. (700 ft. in from the portal), but was neverworked properly. Apparently, the men, atleast the walking bosses and foremen, had ht-tle faith in the fan as a means of ventilation;no real attempt was made to keep it in orderor operate it properly, and a great deal oftime and money was lost groping around inthe smoke and fog, the density of which in-creased, not onlv with the state of the atrnos-phere, but also with the direction of the wind.On some days the tunnels easily cleared them-selves, and on others the smoke was so thickthat a candle held at arms length could not beseen. At this end the South Tunnel was gen-erally worse than the North. After the head-ings were holed through between the portaland the Central Shaft there was very littletrouble, there being usually a strong up-draftthrough the shaft. This was so pronouncedwhen the wind was blowing toward the por-tal, that the moisture-laden air, as it ascendedfrom the mouth of the shaft, presented theapp

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• bookdecade1900