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Recent content by RCEJD

  1. RCEJD

    Subgrade Softening

    I am looking for papers and research on subgrade softening related to dynamic loading (traffic) in cohesive soils. Thanks.
  2. RCEJD

    Pictured soil clasification

    Try the NavFac 7.1 manual for an inital review. The same company has 7.2 which addresses foundations and walls. These tend to be bibles for most geotechs and will be a good reference for you.http://vulcanhammer.net/geotechnical/dm7_01.pdf
  3. RCEJD

    Slope Stability

    We have had good success in these circumstances (details are not available to be sure) with the use of a geosythetic stabilization fabric followed by a gravel layer (1 to several feet thick). Arches and easy to place to form a hard layer to compact against. We have used this approach in...
  4. RCEJD

    Slope stability software

    Forgot to mention, segmented wall design (incl seismic) can also be done by MSEW (http://www.reslope.com/msewindex.htm) by Adama Engineering, recognized as one of the leading segmented retaining wall desogn programs. Fairly flexible, about $1,000. The company is difficult to deal with, but it...
  5. RCEJD

    Slope stability software

    Stedwin (www.stedwin.com) is a widely used program that will provide you with the information for approximatelt $1,200 (US) and has good graphics, used friendly windows environemnt and we can usually have our engineers learn program immediately. We also use the latest Slope/W...
  6. RCEJD

    Detension Ponds on flat sites?

    Check the web. Several companies, ADS, Contech, NDS and several other companies have good, economical underground detention and retention facilities. Hard to estimate a cost based on what you provided but on the order of 15 to 40k type numbers. Just do a search on Google. The companies will...
  7. RCEJD

    self-compacting gravel? really?

    Gravel when dumped does not self compact. It is just that under most applications it is not subject to excess settlement due to arching or the in place density. As dickwewerrat correctly alludes to, if the gravel is subjected to dynamic loading (or larger static loads) it will settle (i.e...
  8. RCEJD

    How many numbers of piles to be tested?

    Good answer by jdonville. FHWA also has specific publications. Also look at Dr. Reese publications for piles (www.ensoftinc.com) Good luck.
  9. RCEJD

    Equivalent fluid pressure

    You must also look at what the other soils that may occur within the active wedge of the retaining wall so as not violate Coulomb's and Rankin's principles. You do not mention whether there is an additional loading from a sloping backfill. Simply consult your geotechnical engineer .. this is...
  10. RCEJD

    I ommitted quantity on bid form, owner wants compensated.

    The question that should be analyzed is simple: Did your negligent omission of the quantity result in damages to the City and/or the Client, and would another reasonable and prudent engineer have foreseen this and not committed the error ? Engineers (myself included) tend to say, hey you had...
  11. RCEJD

    Soil Nail Design

    http://www.fhwa.dot.gov/bridge/geopub.htm#reinforcedsoilstructures
  12. RCEJD

    Concrete Separation

    Agree with the previous posts, and Dr Lymon Reese, out of Texas, is by far the leading expert in the field. We caught a contractor placing concrete with heavy renforcement (bundles of #8 rebar, etc) in 4 foot diameter piles for a landslide mitigation where he dropped concrete 75 feet (against...
  13. RCEJD

    Water line design on steel bridge

    To: Gigi02 We have done many bridges for various applications and have placed the pipes in different configurations. The advice given by Stanier and SlideRuleEra are on point. Typically only see pvc for short term applications ... as pointed out by other posts, for the reasonss stated. Good...
  14. RCEJD

    Soil Nail Design

    FHWA, Caltrans and University of California Davis all have publications and programs that you can use.
  15. RCEJD

    California Start up's (Civil)

    Your E&O will be based on your gross receipts for a company such as CNA or the other major companies. I am not sure if there are still issues about the amount of time you are in business but you can check. The equation also depends on the amount of insurance aggregate for the year and per...
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