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  • Users: groblert
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  1. groblert

    Percussion drilling in old mine workings

    Good day We are a geotechnical engineering company and we are busy with a project where we will need to do percussion drilling into old bord and pillar coal workings. We are concerned about the possibility of drilling into methane and are concerned that this might cause combustion. Can anyone...
  2. groblert

    Membrane correction

    How should one calculate the membrane correction for a triaxial test (CU or CD? I am busy updating our calculation sheets, and for some reason this has been omitted from the older sheets. Thank you in advance.
  3. groblert

    Quick Undrained Shearbox Test

    As far as I understand a shearbox test is a drained test(assumption that excess pore pressure is 0). I do however have clients who require "quick undrained" tests on partially saturated soils. This can surely, at best, be a total stress test? Any recommendations on how quickly I should shear the...

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