Minutes of Proceedings of the Institution of Civil Engineers Volume 64, PT. 2

Minutes of Proceedings of the Institution of Civil Engineers Volume 64, PT. 2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 edition. Excerpt: ...into silt or gravel. When the middle level sluice, at St. Germains, near Kings Lynn failed, and large numbers of whole-timber bearing-pilos were washed out of their places, by the silty soil in which they had been driven being scoured away, it was found that a very large proportion of them had been thoroughly crushed by over-driving, some of them being doubled up into little more than half their original length, and he was cognisant of other like instances. The injury thus caused was by no means confined to the end near the shoe, though it was most frequent there, and it was not.always caused by any defect in the timber. He was also sure that nothing would have been gained by any longer interval between the blows given to the piles by the monkey, in the case of the pile-driving at Portsmouth, it being found that if the driving were resumed after an interval, the piles resisted the effort of the monkey more than if the driving had been continuous. A record of some pile-driving by steam and hand-engines was appended to his Paper. It must, however, be remarked, that the record as to the time expended in the driving by steam must be taken to include an entire stoppage of the work at every fifth blow of the ram to record the result, whereas with the hand-engines no such stoppage was necessary. Mr. Meyer. The timber used at Portsmouth for temporary and permanent works, was nearly all of the same description and quality, and much that had been used for temporary purposes found its way into the permanent work, with certainly no injury to the latter.-With regard to what Mr. Hayter said as to the disadvantage of through tie-bolts below water-level in cofferdams, he must admit that such bolts did occasionally cause leaks by allowing water to pass...show more

Product details

  • Paperback | 182 pages
  • 189 x 246 x 10mm | 336g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236955994
  • 9781236955999