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The Structural Engineer, Volume 74, Issue 10, 1996
Safe use of computers The benefits and hazards of computer use continue to intrigue members. Redmond Holloway has written from Dublin: Having read correspondence on the above with interest, I find that no one has yet answered the very Pertinent questions on computer error posed by Verulam some months ago and worth repeating: Verulam
When driving tunnels by pipe-jacking, relatively compressible packing material distributes the load of the jacking force at joints between pipes to reduce the risk of excessive local contact stresses. Concentrated stresses usually occur where the tunnel excavation departs from the intended line, causing sudden changes in pipeline direction. R.F. Haslem