. Baltimore and Ohio employees magazine . DOE GULLY CUT, CLEARLY SHOWING THE BENCHING OF ROCK CLIFFS TO PREVENT SLIDES 20 THE BALTIMORE AND OHIO EMPLOYES MAGAZINE work. As far as I know, it was the firsttime that such a machine had been usedabove the bench in driving a tunnel. Third: We used, for the first time,steel I-beams for segments instead of thewooden ones which have heretofore beenused in tunnels. This enabled the con-tractor to make his excavation a closer fit problem on account of the restrictedspace in which we had to work, and thenecessity of not burdening the operatingdepartment o
. Baltimore and Ohio employees magazine . DOE GULLY CUT, CLEARLY SHOWING THE BENCHING OF ROCK CLIFFS TO PREVENT SLIDES 20 THE BALTIMORE AND OHIO EMPLOYES MAGAZINE work. As far as I know, it was the firsttime that such a machine had been usedabove the bench in driving a tunnel. Third: We used, for the first time,steel I-beams for segments instead of thewooden ones which have heretofore beenused in tunnels. This enabled the con-tractor to make his excavation a closer fit problem on account of the restrictedspace in which we had to work, and thenecessity of not burdening the operatingdepartment or interfering with their flowof traffic. A steel form about one hun-dred feel long was devised, with derrickson top, and with a solid top, rigged upto run on rails, and straddling the op-. APPROACH CUT OF RANDOLPH TUNNEL IN FOREGROUND AND DOE GULLY CUT INPROCESS OF EXCAVATION IN BACKGROUND to the section required for the arching,the steel segments being curved to thearch while the wooden segments arestraight and form a, polygon, leavingwaste spaces at the joints. Fourth: We used a traveling form tobuild the intertrack wall on Section portion of Section 6 had a very steepbank and a high hill rising four or fivehundred feet, the slope of which aver-aged about a 1 to 1 (one foot up for everyfoot advance made on a level), and wefelt very squeamish about cutting intothe side of the slope. After long consid-eration we thought the best way to handleit was to build a wall and cut as little ofthe slope as we could. It was quite a erated tracks, and it also carried a steelframe for the intertrack wall. This travehng frame was served on theriver side by concrete trains bringingbatches from a mixing plant. Thesebatches were elevated on top of the trav-ehng frame and from there
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbaltimo, bookyear1912
