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  • Users: sgsibob
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  1. sgsibob

    Grouting in vertical fissures in rock

    Isn't the resultant fluid force on a vertical boundary limited by the volume of fluid available to exert the force? I am going to use an example of a fissure in rock but the same could be said of a retaining wall with a finite amount of flowable material behind it, for example a wall cut into...
  2. sgsibob

    Uncompacted rock fill

    Does anyone have any data on the compressibility or settlement of tall (>50 ft) end-dumped and uncompacted rock fill? This occurs in surface mining applications when waste dumps have to be used for some thing else. Information on the shear strength (related to some measure of particle...
  3. sgsibob

    Janbu vs Morgenstern-Price and Spencer in block stability

    We have compared stability analysis methods using SLOPE/W for a block failure geometry in a large rock slope. The problem is a tall slope at roughly 45 degrees which is backed by a fault zone which dips steeper than the slope, and various hypothetical inclined slip surfaces exiting the slope...
  4. sgsibob

    Consolidation settlement of stiff, unsaturated calcareous clays

    I read the old thread on the expected consolidation of clays compacted wet vs dry of optimum and found it interesting but not determinative of a situation we have encountered. How would the expected consolidation parameters differ for an undersaturated stiff clay versus a saturated stiff clay...
  5. sgsibob

    Soldier pile lagging top down installation

    Can someone please enlighten me about the constructibiity pitfalls of top-down lagging of soldier pile walls? If, for example, a lift is excavated 5 ft with lagging in place, what keeps the lagging there -- earth pressure on the back side of the lagging? Suppose the wall is 50+ ft high -- is...
  6. sgsibob

    Should CPT shear values be supported by testing?

    I would like some opinions on whether the standard of practice is met if one relies exclusively on cone penetrometer (CPT) correlations to derive soil shear strength properties for design of critical facilities such as tall retaining walls, bridges, and large culverts, or whether such...
  7. sgsibob

    Modulus K-factor in COM624p for rock

    We are estimating lateral deflections for a socket in yielding rock and have developed p-y curves to take into account the potential for lateral shifting at the top of rock. I am uncertain as to what to enter for the soil modulus parameter k (pci) because I do not know how the program uses the...
  8. sgsibob

    Soil Nail installation costs

    Does anyone have a range of pre-each or footage unit rates for installation of soil nails (just the nails, not the full wall with shotcrete)? Essentially this is just a long, nearly horizontal self drilling soil anchor. I could use cost data for self drilled nails or open-hole drilled nails...

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