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  1. kidCivil

    Helical Piles

    5125er at 95% dry density the load bearing capacity of the ground is pretty high. In my xperience, installing screw piles into engineered fill is more difficult then into natural material because it's been compacted so much. if it's shale at 95% youre talking about, it'll be so hard you;ll get...
  2. kidCivil

    Helical Piles

    this is a great thread I havent heard of anyone in Australia galvanising screw piles but I sure would like to learn more about how they behave/ costs associated with. Most of the time corrosion isnt a major issue for us here, but sometimes it is the predominant requirement and needs to be dealt...
  3. kidCivil

    Cleanliness of piles

    If you're really worried, blow it out with compressed air.
  4. kidCivil

    Helical Pier Capacity

    I agree with DRC's hard granite comment above. I dont come across much granite here in Australia, but your point is noted.
  5. kidCivil

    Helical Piles

    For corrosion, the galvanised and stainless steel options you listed would be rather expensive (rare manufacturing too). Our screw piles are not corrosion proofed, the reason being: 1. The mild steel tube has a thin coating on it from the steel manufacturer (not much but it's something). 2...
  6. kidCivil

    Helical Pier Capacity

    Large column loads can be dealt with by installing multiple screw piles under a pile cap - simple. Seating the screw piles into rock is not new. The pile will not 'spin' just short of the bedrock because it is the helix that advances the pile, not the tip. Besides, there's a higher pressure...
  7. kidCivil

    Helical Piles

    Finally, a subject that falls within my range of experience! lol, check below... Helical (screw) piles are always proprietary products from different companies, ie there is no standard screw pile design spec but many companies make their own. I work for a screw piling company here in Australia...
  8. kidCivil

    Concrete adhesion to steel?

    thanks guys much appreciated -John
  9. kidCivil

    Concrete adhesion to steel?

    What if the mechanical properties were ignored? That is, chemical bonding to the smooth walls of the section?
  10. kidCivil

    Concrete adhesion to steel?

    Hello everyone, I'm working on a design and need some pointers on either some literature or people's experiences with concrete adhesion to steel (not ribbed reinforcement). The design calls for steel screw piles (steel circular hollow section) to be installed under a conc floor. The piles need...
  11. kidCivil

    Competing against engineers that under-design

    my dolution would be to alert the client that the competitors design be checked by a third party (peer review), also notify the client that under designing can void their building insurance... that should make them see the light.
  12. kidCivil

    Soil Classification

    good point bigH I have never been exposed to different log particle size scales because here in Australia, we always use the USCS particle sizes (each chart displays the full spectrum) - thats what makes it easier to compare 'em but it's useful to be aware that a difference can exist and to be...
  13. kidCivil

    Soil Classification

    wasjay well graded means (in figurative terms) that the curve on the particle size distribution graph is smooth and concave (think of it as a pizza with the lot - there's a bit of everything on it) the flatter the curve - the broader the spectrum of particle sizes, the steeper the curve...

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