Canadian engineer . Kensico Siphon—15 ft. Section of 9 ft. 9 in. x 7-16. in. SteelPipe. Size shown by automobile. Prior to placing the concrete of the envelope a grout iS!poured! into the grooves arranged on the upper surface ofthe cradles. Access is gained from the side. This groutfills the system of grooves beneath the steel plate and effectsa close joint. The placing of the interior shell of cement mortar isone of the most interesting and important matters connectedwith the steel siphon work. This lining is required to havea minimum thickness of two inches and a smooth internal- February 29
Canadian engineer . Kensico Siphon—15 ft. Section of 9 ft. 9 in. x 7-16. in. SteelPipe. Size shown by automobile. Prior to placing the concrete of the envelope a grout iS!poured! into the grooves arranged on the upper surface ofthe cradles. Access is gained from the side. This groutfills the system of grooves beneath the steel plate and effectsa close joint. The placing of the interior shell of cement mortar isone of the most interesting and important matters connectedwith the steel siphon work. This lining is required to havea minimum thickness of two inches and a smooth internal- February 29, 1912. THE CANADIAN ENGINEER 345 surface when finished. A little consideration will show thatwe have here a considerable problem. Of course, any satis-factory solution of the problem must be a commercial experimenting: has been done. A steel form presents, perhaps, the best surface adaptedto securing- the desired smoothness. It would, perhaps, be. Special pump chamber arranged to one side of shaft at depth of 300 ft. Equipped with three horizontal Cameron pumps. difficult to provide ribs strong- enough, and yet sufficientlyflexible, to permit slight variations in form to be made. Thetube is not a circle—it is, rather, an ellipse. A device forblowing the grout on to the steel, and thus building up therequired thickness was tried for a while. It seemed to putthe mortar on satisfactorily, except that it left a roughsurface expensive to smooth. On the Gillespie contract wooden forms are used. The bottom of the lining is put inby hand. The remainder—about 270 degrees—is placed ata single pouring when a section of form, perhaps 20 feetlong, is ready. This consists of nine segments, each cov-ering about 30 degrees. Each segment is a unit. They areall alike, so that no mistakes can occur in giving strength to one segmental form interlock withribs of the next one, and so on. The interlocking is securedby providing
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
