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  1. georam

    Equivalent ISO or Eurcode standards

    Hello I wonder if anyone can provide an equivalent or similar ISO for the following ASTM standards ASTM D854 specific gravity test of soils ASTM D7012 – unconfined compressive test of rocks ASTM G57 – resistivity test of soil for grounding (Wenner method) ASTM G162 – soil corrosivity...
  2. georam

    Estimating rockfill unit weight based on its gradation characteristics

    This may be a simple solution. Assume no moisture - rockfill materials. When rockfill is placed in a truck for weighing (assume loose), the unit weight would be unique, based on (a) gradation, (b) particle shapes, and (c) Specific gravity of rocks. For (a), the well graded the rockfill, the...
  3. georam

    Software to do supplies of materials during construction

    Is there a sophisticated software available in the market which can handle management flows for construction materials (such as granular and impervious fills) for a large dam project? The software should be able to provide supplies and demand from various deposit/ borrow sources, time flows...
  4. georam

    How typically a Scale Factor is used on a construction site?

    For a large project, such as a hydroelectric development, the construction drawing will contain a project layout and control drawings, in which dimensions will be provided in true lengths, rather than in a UTM coordinates, such as NAD 83 coordinate system. Since the topo maps are established...
  5. georam

    Basic guide for survey stationing (metric and imperial)

    Could someone remind me on the basic guide on how to assign stations numbering for roadways, dykelines, etc? Any difference between metric and imperial system ? Example: A dykeline 15 km long: Start from 0+00 and end at 15+00 or Start from 0+000 and end at 15+000 A road 20 miles long: How...
  6. georam

    What size of anchor block to moor a barge?

    What size of anchor block is required for mooring a 4000 tonnes barge (gross weight) on a jetty? Is there a rule of thumb to use, i.e how big is the concrete block and how many?
  7. georam

    Name of an expert in hydrogeologist for dam project

    Who are the prominent experts in the field of hydrogeologist? I am thinking about an expert with practical experience, but understand about the hydrogeological modeling in the context of a major dam construction. Concerns related to karstic limestone bedrock as well as potential overburden...
  8. georam

    Powerhouse founded on soil

    Most of the hydroelectrical projects, especially those with high output power utilizing large size turbines in their powerhouses, the powerhouse is usually founded on sound bedrock. This will eliminate long term foundation settlement, potential instabillity due to earthquake, liquefactions, etc...
  9. georam

    Powerhouse founded on overburden

    Most of the hydroelectrical projects, especially those with high output power utilizing large size turbines in their powerhouses, the powerhouse is usually founded on sound bedrock. This will eliminate long term foundation settlement, potential instabillity due to earthquake, liquefactions, etc...
  10. georam

    numerical methods and modeling for dams

    To obtain stresses and strains in a dam foundation, as a dam is being constructed and the water is impounded afterwards, what is the most appropriate software available in the market today to carry out such a modeling analysis? Is FLAC the software of choice for solving geomechanics problems...
  11. georam

    ks value for rocks - need info

    I wonder if there is a table which provide some information about Modulus Subgrade Reaction (ks) for various type and quality of rocks. In particular, I am looing for ks value for a dolomitic limestone bedrock. Is there any relationshipp between ks and Young's modulus of the rock, or between...
  12. georam

    list of geotechnical experts

    I am wondering who do you think are prominent expertise in geotechnics in the following area Soil mechanics - Morgenstern, Meyerhoff, Ralph Peck Permafrost foundations Foundations on soft soils - R.D Holtz Liquefaction and seismic - Ambroesays Geosynthetics - Giroud marine clay/soft clay...
  13. georam

    list of geotechnical experts

    I am wondering who do you think are prominent expertise in geotechnics in the following area Soil mechanics - Morgenstern, Meyerhoff, Ralph Peck Permafrost foundations Foundations on soft soils - R.D Holtz Liquefaction and seismic - Ambroesays Geosynthetics - Giroud marine clay/soft clay...
  14. georam

    Determining Ca/Mg in Limestone rock

    How to determine Ca (calcite) and Mg (dolomite) components of Limestone rock accurately ? There is an XRD (X ray diffraction) method which is used , based on calibration curve suggested by Tennant and Berger (1957 paper). There is also aother method based on Rietveld refinement of XRD patterns...
  15. georam

    Determination of Ca/Mg in Limestone bedrock

    How to determine Ca (calcite) and Mg (dolomite) components of Limestone rock accurately ? There is an XRD (X ray diffraction) method which is used , based on calibration curve suggested by Tennant and Berger (1957 paper). There is also aother method based on Rietveld refinement of XRD patterns...
  16. georam

    Gradation for shear key materials

    A shear key construction requires crushed rock materials, with maximum sizes between 6 and 8 in. What typical gradation should be selected to get the maximum density without compaction effort. The crushed rock will be dumped by the excavator bucket (no compaction), after a 3m wide shear key...
  17. georam

    Selecting gradation of material for shear key construction

    A shear key construction requires a crushed rock materials, with maximum sizes between 6 and 8 in. What typical gradation should be selected to get the best density without compaction effort. The crushed rock will be dumped by the excavator bucket, after a 3m wide shear key trench (up to 6m...
  18. georam

    Probe drilling below foundation

    When I was working in Riyadh, SA, it was very common to probe the foundation Limestone for large structures, particularly if it is a sensitive and huge structure. The area was notorious for having large cavities in the limestone bedrock formation. Why is it a big fuss to probe under the...
  19. georam

    Slope Stabilization Techniques

    How much access do you get for research paper in geotechnical field ? I did some research work a while back and the following papers from Can geotech journal maybe helpful. Also , an excellent book Landslides: Investigation and Mitigation, transportation Research Board, Special report 247...
  20. georam

    Designing core of a dam in seismically active zone

    For an earth core dam with outer granular shell layers, the designed for the core of the dam is usually based on economic and availability of the fill materials. If the impervious fill material (clay) is readily available and cheaper than granular fills, the dam can be designed with relatively...

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