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  • Users: Blairsy
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  1. Blairsy

    Organic "Fines"

    Just curious, is it realistically possible to have organic particles that are finer then the No. 200 sieve? If one were to run a minus 200 wash sieve on a sample of predominately fine sand with apparent organic particles that are also quite fine, could someone make the case that some of those...
  2. Blairsy

    Any Engineering Geologists in the house?

    Are there any geotechnical engineers here who also practice (or have practiced) as an "engineering geologist" or geologist? If so, how did it affect your professional career? I have a master's degree in geotechnical engineering but I am just as equally interested in geology, hydrogeology, etc...
  3. Blairsy

    Excavation and Replacement of Non-Engineered Fill - Contract Question

    I practice in an area where there a few native sites being developed. Most sites are covered with a decent thickness of non-engineered fill ranging from practically trash to soils that require an experienced eye to discern whether it is made ground or not. Since such materials are "undocumented"...
  4. Blairsy

    Folder structure for geotech topics, manuals, research papers, etc.

    I've accumulated a lot of PDFs over the years (research papers, field manuals, design manuals, etc.) related to various topics in geotechnical engineering such as soil and rock mechanics, shallow and deep foundation design, slope stability, and ground improvement, to name a few. I started saving...
  5. Blairsy

    Grouted Riprap Design for Dams and Revetments

    Hopefully I am posting in the correct location. Is anyone familiar with design of grouted riprap for dam spillways or revetments based on expected overtopping flow velocities? I am trying to determine if there would be a considerable reduction in stone size and layer thickness between loose...
  6. Blairsy

    Coefficient of Consolidation (Cv) Question with Project Background

    I am attempting to estimate the time rate of primary consolidation for a particular soil profile due to placement of a large area fill load. We drilled several SPT borings at the site and determined that the subsurface profile generally consists of 10 feet of existing fill (mostly granular...
  7. Blairsy

    Ground Improvement Question - Migration of Fines into Compacted Stone Columns / Aggregate Piers

    Should the migration of soil fines into non-grouted compacted stone columns be considered during design if the stone columns are expected to penetrate fill comprised of sand with less than 15% fines and terminate at the top of a dense native sand stratum? The stone columns will be constructed...
  8. Blairsy

    Help Please - permeability testing above groundwater table

    Here is my issue: I was recently tasked with conducting field permeability tests inside cased/partially cased boreholes at a site with low permeability (glacial till) deposits and a deep groundwater table to aid in appropriately sizing a proposed stormwater infiltration chamber. All of the...
  9. Blairsy

    Construction oversight resources for young field engineers

    I think most of know how important geotechnical engineering oversight/observations (and documentation of observations) are to the success of a structures performance and adherence to project specifications. The company I work for recently hired a couple field engineers right out of school that...

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