Definitionn. large watertight chamber used for construction under water
Last update: August 23, 2015
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Formerly when bridge piers had to be placed where a firm bearing stratum could only be reached at a considerable depth, a timber cofferdam was used in which piles were driven down to the firm stratum. [Please select]
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The foundations were put down by means of a cofferdam which was kept dry by pumping. [Please select]
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The cofferdam consisted of triple-lap sheet piling, of the Wakefield pattern, the planks being 2 ins. [Please select]
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Referring to the cost of cofferdam work, we see that, in order to excavate the 58 cu. [Please select]
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A hand pump served to keep the cofferdam dry enough for excavating; but in more open material a power pump is usually required. [Please select]
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The cofferdam work was done in connection with the construction of the fourth pier, this pier being the only one coming in the bed of the river to be built entirely new. [Please select]
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