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Ground settlement occurs ahead or behind the jacking face for pipe-jacking?
It's reported by Lake (1992) that settlements are expected at ground surface at a distance of 1-2 times of tunnel depth ahead of tunnel face and 80% to 90% of settlement to be finished at a similar distance behind the face. Though in the paper 'Monitoring of ground response associated with pipe jacking works - recent experience in Hong Kong', the author highlighted that based on their experience, development of longitudinal settlement was observed at a distance of 3-4 times of tunnel depth behind the tunnel face and little settlements were reported immediately above the tunnelling face.
Classification Based on Availability: Forest departments categorized timbers based on the availability as X=Most common. 1415 m 3 or more per year Y=Common. 355 m 3 to 1415
In some nations such as Britain, specification for concrete doesn'tusually require cube tests for standard mixes of concrete. Quality control of standard mixes in Britain is achiev
Write difference between the working stress method and limit step methode
the nick name of FeS is fool''s gold-explain
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Grouted or Penetration Macadam: This is a specification where the binder is sprayed on a compacted layer of stone aggregates and is allowed to penetrate and bind the aggregat
QUESTION (a) What is the definition of Day light Factor (D)? (b) Determine the daylight factor of a room of an area of 100m 2 with an opening of 50m 2 of glazing. As wha
i want to know more about civil engineering
Compression Members: Compression members in steel need special care in design. Steel possesses high strength in tension/compression; hence the sections are generally small com
grading surface area of Aggregate
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