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  1. Chewi00

    cold vs. hot rolled piling

    sorry to follow up, what I do know is that I believe cold formed is more expensive (maybe irrelevant if contractor owns supply), and the interlock strenghts may be limited. Again....thanks in advance.
  2. Chewi00

    cold vs. hot rolled piling

    Contractor is proposing to use cold formed piles in lieu of hot rolled piling that was specified. THis is for a combination bulkhead wall. Looking for general pro's and con's between the two types. My familiarity is soley with hot rolled piling. THanks in Advance, Adam
  3. Chewi00

    ice loading

    I have a bulkhead and sheetpile enclosure (as part of dredging) that I am designing on the Hudson River. What are the recomended manuals for designing for ice loading (jamming and impact)? Thanks in Advance, Adam
  4. Chewi00

    Duck-billed anchors

    has anyone used duckbill anchors to support temporary excavations? any opinions would be appreciated.
  5. Chewi00

    Sheet Piles in Rock

    oohhh. I forgot, we used "rock teeth" in once instance. These are fabricated to the bottom of the piles and help with obstructions and rock. That was a very stiff sheet, impact hammer and rock with poor RQD though.
  6. Chewi00

    Sheet Piles in Rock

    I have used rock pins like PEInc suggested. usually you attach a sleeve to the pile before driving, clean out sleeve then drill into rock, place your pins and grout into place. If you fix your toes in the design, it should give you the shear force at the bottom you need to design the pins...
  7. Chewi00

    Soldier pile installation question

    I have 94' long W36x150 soldier piles going in as part of a bulkhead. what im wondering is the maximum length these can be installed without splicing....and how much does splicing reduce intallation production (e.g. 25% reduction). These piles are going to be installed from a barge and this is...
  8. Chewi00

    Sheetpile Rock Pin design

    Does anyone have a good design reference for rock pins used for shear support at the toe of a sheetpile wall which cannot develop enough embedment resistance due to shallow bedrock? Thanks in Advance, Adam
  9. Chewi00

    testing for sheet piles

    How are you proposing putting deadman in? If your retaining a slope that is on the verge of failure, won't you need to perform excavation on the slope to install deadman sheets? I would think tiebacks are your best bet....maybe im not understanding completely though.
  10. Chewi00

    auger refusal standard

    THanks for the input...I also have said numerous times that there is so many variables that the on-site engineer with the driller would make a field call as to refusal.....ive never had to define it in a workplan.
  11. Chewi00

    auger refusal standard

    Is there a standard for definition of auger refusal on rock when drilling? I have language in a workplan that states soil stabilization will occur to bedrock (known elevation) or auger refusal....the state came back wanting to define auger refusal. I seem to recall 6 inches in 15 minutes from...
  12. Chewi00

    Articulated Concrete Block Mattress

    I just finished a Articulated Concrete Block design for protection dwostream of a water control structure. All the design guidances I have seen (as well as technical guidance from Submar) treat the blocks individually, not as a cabled system. If you provide an email address I can forward a...
  13. Chewi00

    Slope/W 2007 question

    any of them? or just the auto-locate? Is there any particular reasoning?
  14. Chewi00

    Slope/W 2007 question

    Does anyone have any thoughts on the slip-surface auto-locate function on SLope/W? Im wondering what the advantages are rather than a grid and radius solution. Thanks in Advance, AChwalibog
  15. Chewi00

    Deadman and Reaction Sheeting

    Can anyone reference me to a good design manual for Reaction sheeting with deadman anchors? Thanks in Advance.
  16. Chewi00

    Gradation testing of river rock

    can rip-rap/river rock be tested using ASTM D422. THe soil has up to 9" rock. I wouldnt think you can run a sieve on this material, but if not how do they determine the gradation?
  17. Chewi00

    class I & II concrete

    Typically, in the US anyways: Type I/IA are general purpose cements suitable for all uses where the special properties of other types are not required, where Type II cements contain no more than 8% tricalcium aluminate (C3A) for moderate sulfate resistance. Like advised above, check the ACI or...
  18. Chewi00

    Heavy Section vs. Bracing

    Thank you all! these responses have helped validate our design teams thoughts and concerns and made me more confident that our initial braced design was indeed the best approach.
  19. Chewi00

    Heavy Section vs. Bracing

    I agree....all the client sees is the cost savings of using cantilevered system brought up by the peer reviewer, and cant understand the risks involved. I am likely to say either the peer reviewer can stamp a cantilevered design, or we can go with the current braced design. Thanks for all the...
  20. Chewi00

    Heavy Section vs. Bracing

    well there is a shallow water table and the dig is going to approximately 20'....so perimeter sheeting is being used for dewatering purposes and also the client is concerned to cut back slopes due to the potential for uncovering additional contaminants that they arent currently required to...

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