Canadian engineer . sluiceways for the first was January, 1911, before the cof-ferdam was put under way again, whenit was raised about two feet and tracklaid on top to carry stone filling andother material. The lake had by then lowered threefeet, so with a falling river, it was de-cided to cofferdam the whole channeland cribwork was begun from theQuebec shore. The advantage is thatthis method allows the foundation slab and cut-offwalls to be built without joint. With a cofferdamhalf way across, the part parallel to the current requiresto be a double crib with clay in the middle. Otherw
Canadian engineer . sluiceways for the first was January, 1911, before the cof-ferdam was put under way again, whenit was raised about two feet and tracklaid on top to carry stone filling andother material. The lake had by then lowered threefeet, so with a falling river, it was de-cided to cofferdam the whole channeland cribwork was begun from theQuebec shore. The advantage is thatthis method allows the foundation slab and cut-offwalls to be built without joint. With a cofferdamhalf way across, the part parallel to the current requiresto be a double crib with clay in the middle. Otherwise, thecurrent .will scour away staunching material from the ex-posed face, and in this case a boulder bottom prevents thedriving of sheet piles. An inexperienced force, cold windy weather, and theswift current made crib setting very slow and several cribswere lost by upsetting or breaking away of tackle. By the first week of February, the new cribwork wasconnected to that built in October, and by the middle of the.
Size: 1621px × 1541px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
