oa Civil Engineering = Siviele Ingenieurswese - Some significant developments in the design and construction of water-retaining structures

Volume 8, Issue 12
  • ISSN : 1021-2000



The Author has given a most interesting resume of recent innovations in the design and construction of water retaining structures, and in connection with two aspects of his paper, certain points involving technique are worthy of mention. In the case of Henley Dam, holes up to 4 in. diameter and 150 ft deep had to be drilled to tolerances of I in. in 10 ft for verticality and in. in 10 ft for straightness which are extremely close tolerances in normal percussion drilling practice.

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