The Coffer Dam Process for Piers Practical Examples From Actual Work
The book The Coffer Dam Process for Piers Practical Examples From Actual Work was written by author Charles Evan Fowler Here you can read free online of The Coffer Dam Process for Piers Practical Examples From Actual Work book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Coffer Dam Process for Piers Practical Examples From Actual Work a good or bad book?
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The rock bottom was overlaid with two feet of clay and the clay with eighteen inches of sand and mud, the depth of water over the rock being twenty-eight feet at high tide. The square hemlock timbers used in the walls were halved together and the walls braced together by bolts and round timbers for struts, the round tim- bers allowing the puddle to run around them and pack well as thrown in. THE COFFER-DAM PROCESS FOR PIERS. 39 Clamp timbers 4x6, in two lengths, were held in place by the bolts ...and the struts were braced against 6-inch plank. The dam was built to one-third its height on shore, then towed to position and built up until grounded. Between the timbers and the joints candle-wicking was placed, and the courses drift bolted together every three feet and spiked at the joints. The rock was dredged bare before placing the crib, which was filled with a hard, gravelly clay between the walls after being sunk in place. A rich Portland concrete was dumped inside, from triangular buckets, to seal the bottom and then the dam was pumped out with a 6-inch pump and kept dry by pumping at intervals.
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